WO1997002596A1 - Composant electronique et son procede de fabrication - Google Patents
Composant electronique et son procede de fabrication Download PDFInfo
- Publication number
- WO1997002596A1 WO1997002596A1 PCT/JP1996/001492 JP9601492W WO9702596A1 WO 1997002596 A1 WO1997002596 A1 WO 1997002596A1 JP 9601492 W JP9601492 W JP 9601492W WO 9702596 A1 WO9702596 A1 WO 9702596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- functional element
- wiring board
- wiring
- electronic component
- gap
- Prior art date
Links
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1085—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a non-uniform sealing mass covering the non-active sides of the BAW device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
- H01L21/561—Batch processing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/60—Attaching or detaching leads or other conductive members, to be used for carrying current to or from the device in operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/13—Mountings, e.g. non-detachable insulating substrates characterised by the shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3135—Double encapsulation or coating and encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/315—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed the encapsulation having a cavity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49805—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers the leads being also applied on the sidewalls or the bottom of the substrate, e.g. leadless packages for surface mounting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/93—Batch processes
- H01L24/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L24/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- Y10T29/49146—Assembling to base an electrical component, e.g., capacitor, etc. with encapsulating, e.g., potting, etc.
Definitions
- the present invention relates to a surface acoustic wave device and an EP ROM (Erasab1e).
- the present invention relates to electronic components such as devices, charge coupled devices), semiconductor lasers, light emitting diodes, and the like, and to a method of manufacturing the same, and more particularly to an electronic component having a device mounted face down on a substrate and a method of manufacturing the same.
- the surface acoustic wave element Due to its function, the surface acoustic wave element requires an air gap on the surface of the transducer portion where the surface wave propagates, and the presence of a foreign material layer on the surface adversely affects the propagation of the surface wave. The properties are impaired. For this reason, a means for accommodating the surface acoustic wave element in a package has been adopted. In this case, the resin sealing means used in ICs, etc. cannot be applied because the resin covers the transducer part that excites and propagates the surface wave, and is usually airtight using a metal package or ceramic package. Sealing means called structures are frequently used.
- the hermetic sealing structure using the above-mentioned metal package or ceramic package has poor productivity and does not increase the mounting density.
- the face-down type surface acoustic wave device disclosed in Japanese Patent Application Laid-Open No. Hei 4-56510 and Japanese Patent Application Laid-Open No. 5-55303 discloses a surface acoustic wave in which a transducer portion and a bonding pad portion are formed.
- a gap is provided in the space, and it is joined via a conductive material such as a bump and covered and fixed with resin.
- Surface acoustic wave device is provided.
- a sealing resin for manufacturing such a surface acoustic wave device a liquid thermosetting epoxy resin for potting or the like is used, but because of its low viscosity, a transformer is required before the resin is cured. The surface of the duplexer is covered with the liquid resin. For this reason, a frame-shaped insulating member or dam must be formed so as to surround the propagation path of the surface acoustic wave generated by the transducer section on the element before being integrally covered and fixed with resin.
- FIG. 46 (a) is a cross-sectional view
- FIG. 46 (b) is a cross-sectional view taken along a line A—A in FIG. 46 (a).
- FIG. 2 shows a plan view of a substrate.
- 201 and 202 indicated by dotted lines indicate the positions of the surface acoustic wave element 203 and the conductive bump 204, respectively.
- the wiring substrate 205 has a conductive wiring pattern 206 formed on both surfaces of the insulating substrate and end surfaces continuous with both surfaces.
- a transducer section 207 comprising a comb-shaped electrode pattern, and a wiring pattern 2 electrically connected to the comb-shaped electrode pattern for supplying signals. 0 8 is formed.
- the transducer part 2007 of the surface acoustic wave element 203 and the wiring board 205 are disposed so as to form a gap part 209 and face each other.
- the wiring pattern 208 and the wiring pattern 206 on the wiring board 205 are electrically connected by conductive bumps 204 made of gold (Ai), silver (g), or the like. I have.
- the connection between the surface acoustic wave element 203 with the conductive bumps 204 and the wiring board 205 and the surface acoustic wave element 203 are covered with a resin material 210 such as epoxy resin. .
- a resin material 210 such as epoxy resin.
- a liquid thermosetting epoxy resin or the like is used as the sealing resin material.
- a frame-shaped member made of polyimide resin or the like is used. Insulating members or dams 211 are provided.
- the wiring board 20 is formed so that the resin 210 covering the whole or a part of the transducer section 207 of the surface acoustic wave element 203 covers the whole element so that the resin 210 does not flow out from the peripheral edge of the wiring board 205.
- 5 Frame-shaped insulating part formed of polyimide resin, etc. Lumber or dams 2 1 2 are provided.
- Fig. 46 (b) shows the frame-shaped insulating member or dam 2 11
- FIG. 3 is a plan view of a wiring board 205 on which 2 12 is formed.
- the sealing resin 210 of the surface acoustic wave element 203 is blocked by the frame-shaped insulating member or the dam 211, and flows into the void 209 until the resin 210 is cured.
- the surface acoustic wave element does not enter the surface acoustic wave propagation path, and the surface of the surface acoustic wave element is held in a hollow shape, so that the characteristics are not impaired.
- the resin 210 is formed on the wiring board by the dam 2 12 provided on the periphery of the wiring board.
- the effective area of the transducer section which is the functional surface of the surface acoustic wave element, must be limited to a small amount by forming a frame-shaped insulating member and a dam. For this reason, for example, a surface acoustic wave for mobile communication is required. While there is a strong demand for miniaturization of the device, there has been a problem that it is insufficient to fully exhibit the characteristics and functions of the surface acoustic wave device.
- the present invention has been made in view of such circumstances.
- An object of the present invention is to provide an electronic component that does not adversely affect the characteristics of elements mounted on the electronic component and that can be easily sealed with a resin, and a method of manufacturing the electronic component.
- An object of the present invention is to provide an electronic component suitable for miniaturization and high-density mounting. It is to provide a manufacturing method.
- the present invention does not adversely affect the characteristics of elements mounted on electronic components, can be easily resin-sealed, is resistant to electrical noise, is easy to mark, and improves productivity and reliability. It is an object of the present invention to provide an electronic component and a manufacturing method thereof.
- resin sealing can be easily performed without adversely affecting the characteristics of elements mounted on electronic components, and stress distortion caused by differences in resin curing and thermal expansion is reduced, and further sealing is achieved. It is an object of the present invention to provide an electronic component and a method for manufacturing the same, which reduce unfavorable effects of characteristics on characteristics and improve productivity and reliability.
- the present invention provides an electronic device that does not adversely affect the characteristics of an element mounted on an electronic component, can be easily sealed with a resin, solves a problem due to a thickness of a joining member, and improves productivity and reliability. It is intended to provide a component and a method for manufacturing the same.
- ADVANTAGE OF THE INVENTION This invention does not adversely affect the characteristic of the element mounted in an electronic component, can be easily resin-sealed, and furthermore, since the sealed resin works as a surface acoustic wave absorber, for example, the surface wave absorption performance is further improved. It is an object of the present invention to provide an electronic component capable of improving (sound absorbing effect) and improving productivity and reliability, and a method for manufacturing the same. Another object of the present invention is to provide an electronic component having an electromagnetic shielding effect (shielding effect), which is unlikely to induce external noise and operates stably, and a method for manufacturing the same.
- Another object of the present invention is to provide a surface acoustic wave device that prevents the surface acoustic wave element of the sealing member from entering the transducer section, and a method of manufacturing the same. It is another object of the present invention to provide a surface acoustic wave device having a high strength while preventing a sealing member, particularly an elongated surface acoustic wave element, from entering a transducer portion, and a method of manufacturing the same.
- An object of the present invention is to provide an electronic component capable of effectively securing a gap between a mounted functional element and a wiring board, and a method of manufacturing the electronic component.
- the present invention provides an electronic component with high reliability of connection, which can effectively secure a gap between the mounted functional element and the wiring board, and can sufficiently maintain the bonding strength between the functional element and the wiring board. It is intended to provide a manufacturing method thereof.
- An object of the present invention is to provide an electronic component having a high degree of freedom in design and a method of manufacturing the electronic component without requiring a frame-shaped member for preventing a sealing member from flowing.
- An object of the present invention is to provide an electronic component which does not require a frame-shaped member for preventing the sealing member from flowing in, and which can sufficiently exhibit the function of the active element, and a method for manufacturing the same.
- An object of the present invention is to provide an electronic component having high bonding strength between a mounted element and a wiring board and high connection reliability, and a method for manufacturing the same.
- the method for manufacturing an electronic component according to the present invention includes: (a) a step of disposing the first surface of the wiring board and the first surface of the functional element to face each other; and (b) the first surface of the wiring board and / or Arranging a heat melting type member above a second surface of the functional element; A step of heating and melting the mold member and sealing the gap while leaving at least a gap between the wiring substrate and the functional element.
- the method for manufacturing an electronic component of the present invention may further include, prior to the step (a), a step of disposing a frame-shaped member on the first surface of the wiring board so as to surround the gap. .
- the heat melting type member in the step (c), may be heated and melted so as to cover the entire second surface of the functional element. In the method of manufacturing an electronic component according to the present invention, in the step (c), the heat melting type member may be heated and melted while exposing the entire second surface of the functional element. In the method for manufacturing an electronic component according to the present invention, in the step (c), the heat melting type member may be heated and melted while exposing a part of the second surface of the functional element. In the method for manufacturing an electronic component of the present invention, in the step (a), the first surface of the wiring board and the first surface of the functional element may be arranged to face each other via a conductive bonding member. Good.
- the functional element is a surface acoustic wave element
- the connection pattern on the first surface of the wiring substrate and the elastic surface wave element may be opposed to the connection pattern via a conductive bonding member by a face down bonding method.
- the functional element is a quartz oscillator
- a connection pattern on a first surface of the wiring board and a first pattern of the quartz oscillator are provided.
- the electrodes on the surface are opposed to each other by a face-down bonding method via a conductive bonding member, and the wiring pattern on the first surface of the wiring board is electrically connected to the electrodes on the second surface of the crystal unit.
- Electrically connecting by a connecting means and further comprising, between the steps (a) and (b), arranging a surrounding member on the wiring substrate so as to surround the quartz oscillator;
- a heat melting type member may be arranged at least on the surrounding member.
- the functional element is a piezoelectric vibrator
- the connection pattern on the first surface of the wiring board and the piezoelectric vibrator is opposed to the electrode on the first surface of the wiring substrate by a face-down bonding method via a conductive bonding member.
- the electrode on the surface may be electrically connected by an electrical connection means.
- the functional element is a photo-power blur having a pair of a light transmitting unit and a light receiving unit
- the connection pattern on the first surface of the wiring board is provided.
- a wiring pattern on each first surface of the photocoupler are opposed to each other by a face-down bonding method via a conductive bonding member, and between the steps (a) and (b),
- the method may further include a step of arranging a surrounding member on the wiring board so as to surround the wiring member.
- the wiring substrate is a substrate that transmits light
- the functional element is an EPROM
- the first surface of the wiring substrate is The light-receiving surface of the EPROM may be arranged to face.
- the wiring substrate is a substrate that transmits light
- the functional element is a CCD
- the first surface of the wiring substrate and the CCD May be disposed so as to face the light receiving surface.
- the wiring substrate is a substrate that transmits light
- the functional element is a semiconductor laser
- the first surface of the wiring substrate is The light emitting surface of the semiconductor laser may be disposed to face.
- the wiring substrate is a substrate that transmits light
- the functional element is a light emitting diode
- the first surface of the wiring substrate is The light emitting surface of the light emitting diode may be arranged to face.
- the functional element has a bump
- the bumps of the functional element are arranged so as to face the wiring board;
- the heat-melting member is made of a resin. Is also good.
- the heat-meltable member may be a thermosetting resin.
- the heat-meltable member may be epoxy resin.
- the heat-meltable member may be a phenol-based epoxy resin.
- the heat-meltable member may be a silicone resin.
- the heat-meltable member may be a low-melting glass.
- Low melting point glass having a melting point of 250 ° C. to 400 ° C. may be used.
- Low melting point glass having a melting point of C to 350 ° C. may be used.
- the heat melting type member may be a lead borosilicate glass.
- the heat-fusible member may be at least one of lead borosilicate glass and bismuth borosilicate glass.
- the method for manufacturing an electronic component of the present invention may include a step of temporarily fixing the wiring board and the functional element before the step (a).
- the heat-fusible member may have a shape larger than the shape of the functional element and substantially equal to the shape of the wiring substrate.
- the heat-meltable member may be a material obtained by cold-pressing a powder material.
- the shape of the ripening / melting mold member before heating and melting may be a shape in which a peripheral portion thereof is suspended.
- the step (c) may include a plurality of heating steps.
- the heating and melting of the heat melting type member is performed at a curing temperature of 100 to 200 ° C. and a curing time of 20 to 2 hours. You may.
- An electronic component includes a wiring board having a first surface and a second surface, a first surface and a second surface, wherein the first surface faces the first surface of the wiring substrate. And a heat melting type member that seals the void while leaving a void between the first surface of the wiring substrate and the first surface of the functional element. It is characterized by:
- the electronic component may further include a frame-shaped member disposed on the first surface of the wiring board and surrounding the void.
- the heat melting type member may be disposed so as to cover the entire second surface of the functional element.
- the heat melting type member may be arranged so as to cover a part of the second surface of the functional element.
- the heat melting type member may be arranged so as to expose the entire second surface of the functional element.
- the electronic component of the present invention may further include a conductive bonding member disposed between the first surface of the wiring board and the first surface of the functional element.
- the functional element is a surface acoustic wave element, and a connection pattern between a connection pattern on a first surface of the wiring board and a connection pattern on a first surface of the surface acoustic wave element is provided.
- the semiconductor device may further include a conductive bonding member bonded by a face-down bonding method.
- the functional element is a quartz oscillator, and face-down bonding is performed between the connection pattern on the first surface of the wiring board and the electrode on the first surface of the quartz oscillator. Electrically connecting a conductive bonding member to be bonded by a method, a wiring pattern on a first surface of the wiring substrate, and an electrode on a second surface of the crystal unit. And electrical connection means connected thereto.
- the functional element is a piezoelectric vibrator, and face-down bonding is performed between the connection pattern on the first surface of the wiring board and the electrode on the first surface of the piezoelectric vibrator.
- a conductive bonding member for bonding by a method, and electrical connection means for electrically connecting a wiring pattern on a first surface of the wiring substrate to an electrode on a second surface of the piezoelectric vibrator. May be.
- the functional element is a photo force blur having a pair of a light transmitting portion and a light receiving portion, and the connection pattern on the first surface of the wiring substrate and each of the photo force blurs are included.
- a conductive joining member that joins the wiring pattern on the first surface by a face-down bonding method, and a surrounding member that is disposed on the first surface of the wiring board and surrounds the photo-power bra.
- the heat melting type member may be arranged at least on the surrounding member.
- the wiring substrate may be a substrate that transmits light
- the functional element may be an EPROM whose first surface is a light receiving surface.
- the wiring substrate may be a substrate that transmits light
- the functional element may have a first surface that is a CCD.
- the wiring substrate may be a substrate that transmits light
- the functional element may be a semiconductor laser having a first surface having a light emitting surface
- the wiring substrate may be a substrate that transmits light
- the functional element may be a light emitting diode whose first surface is a light emitting surface.
- the heat melting type member may be a resin.
- the heat melting type member may be a thermosetting resin.
- the heat melting type member may be an epoxy resin.
- the heat melting type member may be a phenol-based epoxy resin. Further, in the electronic component of the present invention, the heat melting type member may be a silicone resin.
- the heat melting type member may be a low melting point glass.
- the heat melting type member may have a temperature of 250 °.
- Low melting point glass having a melting point of C to 400 ° C. may be used.
- the heat melting type member may be a low melting point glass having a melting point of 320 ° C. to 350 ° C.
- the heat melting type member may be lead borosilicate glass.
- the heat melting type member may be at least one of lead borosilicate glass and bismuth borosilicate glass.
- the wiring board may include a first wiring pattern formed on a first surface, a second wiring pattern formed on a second surface, and an end surface of the wiring substrate. And a third wiring pattern that connects the first wiring pattern and the second wiring pattern.
- An electronic component has a first surface and a second surface, a wiring board having a wiring pattern formed on at least the first surface, and a first surface and a second surface.
- a functional element having a first surface facing the first surface of the wiring board; a conductive film formed on a second surface of the functional element; wiring between the conductive film and the wiring board; And a sealing member that seals the gap while leaving a gap between the first surface of the wiring board and the first surface of the functional element. It is characterized by doing.
- the electronic component of the present invention has a first surface and a second surface, and has a wiring board having a wiring pattern formed on at least the first surface, and a first surface and a second surface, A functional element having a first surface facing the first surface of the wiring substrate, a metallic foil formed on a second surface of the functional device, the metallic foil and the wiring substrate Conductive means for conducting between the wiring pattern and the first surface of the wiring board and the functional element. And a sealing member for sealing the gap while leaving the gap between the first surface and the first surface.
- the electronic component of the present invention has a first surface and a second surface, and has at least a wiring substrate having a wiring pattern formed on the first surface, and a first surface and a second surface, A functional element having a first surface facing the first surface of the wiring substrate, a conductive film formed on a second surface of the functional device, the conductive film and the wiring substrate And a resin in which a magnetic substance that conducts between the wiring pattern and the functional element is dispersed, and the gap is sealed while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element. And a sealing member for stopping.
- the electronic component of the present invention has a wiring board having a first surface and a second surface, and has a first surface and a second surface, wherein the first surface is the same as the first surface of the wiring substrate. It is made of a resin in which a functional element and a metal powder are dispersed to face each other, and the gap is formed while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element.
- the electronic component of the present invention has a wiring board having a first surface and a second surface, and has a first surface and a second surface, wherein the first surface is the same as the first surface of the wiring substrate.
- a functional element disposed oppositely; and a resin in which a magnetic substance powder is dispersed, wherein the void is formed while leaving a void between the first surface of the wiring board and the first surface of the functional element.
- a sealing member for sealing the sealing member.
- the electronic component of the present invention includes a wiring board having a first surface or a second surface, a first surface and a second surface, wherein the first surface is a first surface of the wiring substrate.
- a functional element disposed to face the surface, and a resin in which a radio wave absorber material is dispersed, while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element.
- a sealing member for sealing the gap.
- the electronic component of the present invention includes a wiring board having a first surface or a second surface, a first surface and a second surface, wherein the first surface is a first surface of the wiring substrate.
- a functional element disposed to face the surface; and a resin containing a conductive filler, wherein the void is formed while leaving a void between the first surface of the wiring board and the first surface of the functional element. Seal the part And a sealing member.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having recesses formed at two end surfaces, and a first surface and a second surface.
- a functional element having a first surface disposed opposite to the first surface of the wiring board; and a void between the first surface of the wiring substrate and the first surface of the functional element.
- a sealing member for sealing the gap portion while leaving, and a pair of convex portions engaging with the concave portions provided on the wiring board are provided on the two legs so as to face each other.
- a metal plate that covers the first surface of the substrate and the functional element.
- an electronic component of the present invention has a first surface and a second surface, a concave portion is formed on each of two end surfaces, and a wiring pattern in which a wiring pattern is formed on the inner surface of the concave portion.
- a functional element having a first surface and a second surface, wherein the first surface is disposed so as to face the first surface of the wiring board; and the first surface of the wiring substrate and the function
- a sealing member that seals the gap while leaving a gap between the first surface of the element and an electrical connection to each wiring pattern on the inner surface of the recess while engaging with each recess provided in the wiring board;
- a pair of protrusions that are electrically connected to each other are provided on the two legs so as to be opposed to each other, and include a metal plate that covers the first surface of the wiring board and the functional element.
- the electronic component of the present invention has a first surface and a second surface, and a wiring board having a stepped portion in which the first surface is an upper stage at each of two end surfaces, A functional element having a first surface and a second surface, wherein the first surface is arranged to face the first surface of the wiring board; and the first surface of the wiring substrate and the functional element.
- a metal plate is provided on the leg portion so as to face each other, and the first surface of the wiring board and the metal plate covering the functional element are provided.
- the electronic component of the present invention has a first surface or a second surface, the first surface side is an upper stage on each of two end surfaces, and a wiring pattern is provided on a lower stage surface.
- a functional element having a first surface and a second surface, the first surface being opposed to the first surface of the wiring substrate;
- the first side and the front side of the wiring board A sealing member for sealing the gap while leaving a gap between the first surface of the functional element and each wiring of the lower step portion that engages with each stepped portion provided on the wiring board;
- a pair of projecting portions electrically connected to the pattern are provided on the two legs so as to face each other, and a first plate of the wiring board and a metal plate covering the functional element are provided. It is characterized by.
- the electronic component of the present invention has a wiring board having a first surface and a second surface, and has a first surface and a second surface, wherein the first surface is the same as the first surface of the wiring substrate.
- a functional element disposed to face, a cushioning material disposed on a second surface of the functional element, and a gap between a first surface of the wiring board and a first surface of the functional element.
- a sealing member that seals the gap while leaving the gap.
- the electronic component of the present invention includes a wiring board having a first surface or a second surface, a first surface and a second surface, wherein the first surface is a first surface of the wiring substrate.
- a functional element disposed to face the surface, and a resin containing a glass filler, wherein the void is formed while leaving a void between the first surface of the wiring board and the first surface of the functional element.
- a sealing member for sealing the sealing member.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface, A wiring pattern is formed on the first surface, and the first surface is arranged so as to face the first surface of the wiring board, and the functional element is concentratedly arranged in a region near the center of the functional element.
- a joining member that electrically connects a wiring pattern of the wiring board and a wiring pattern of the functional element; and a gap between a first surface of the wiring substrate and a first surface of the functional element.
- a sealing member for sealing the gap while leaving the portion.
- the electronic component of the present invention has a first surface and a second surface, a wiring substrate having a wiring pattern formed on the first surface, and a first surface and a second surface, A wiring pattern is formed on the first surface, and the first surface is arranged so as to face the first surface of the wiring substrate, and the functional element is arranged intensively in a region near the center of the functional element.
- a first connecting member that electrically connects a wiring pattern of the wiring board and a wiring pattern of the functional element; and a wiring pattern of the wiring board, which is disposed in a peripheral region of the functional element.
- a second joining member that is not involved in the electrical connection between the wiring board and the functional element; and a gap between the first surface of the wiring board and the first surface of the functional element while leaving a gap.
- a sealing member for sealing the gap for sealing the gap.
- the electronic component of the present invention has a first surface and a second surface, and the first surface has a first wiring pattern made of a conductive material having a first thickness and a second wiring pattern thicker than the first thickness.
- a sealing member that seals the gap while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element.
- the electronic component of the present invention has a first surface and a second surface, a first region made of a substrate material having a first thickness, and a substrate having a second thickness greater than the first thickness.
- a wiring substrate having a second region made of a material, a wiring pattern formed on the first region and the second region on the first surface, and a first surface and a second surface.
- a functional element having a wiring pattern formed on the first surface, the first surface being disposed so as to face the first surface of the wiring substrate; and a wiring pattern of a second region of the wiring substrate.
- a conductive bonding member disposed between the wiring pattern of the functional element and the void while leaving a void between the first surface of the wiring board and the first surface of the functional element; And a sealing member for sealing the sealing member.
- the electronic component of the present invention has a first surface and a second surface, a wiring substrate having a wiring pattern formed on the first surface, and a first surface and a second surface, A functional element having a wiring pattern formed on a first surface, the first surface being arranged to face the first surface of the wiring board; a wiring pattern on the first surface of the wiring board; A conductive bonding member disposed between the wiring patterns on the first surface of the element and having bumps stacked in accordance with an interval between the wiring patterns; a first surface of the wiring substrate and a first surface of the functional element; A sealing member for sealing the gap while leaving the gap between the surface and the surface.
- the electronic component of the present invention has a first surface or a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface.
- a functional element that is a surface acoustic wave element having a wiring pattern and a sound absorbing agent formed on a first surface, wherein the first surface is arranged to face the first surface of the wiring substrate; and
- a conductive joining member having a height exceeding the thickness of the sound absorbing agent, and a first surface of the wiring board and a first surface of the functional element.
- a sealing member for sealing the gap while leaving the gap between the surface and the surface.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface, A function as a surface acoustic wave element in which a wiring pattern is formed on a first surface, a sound absorbing agent is formed on a second surface, and the first surface is arranged to face the first surface of the wiring board.
- An element, a conductive bonding member disposed between a wiring pattern of the wiring board and a wiring pattern of the functional element, and between a first surface of the wiring substrate and a first surface of the functional element.
- a sealing member for sealing the gap while leaving the gap.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface, A function as a surface acoustic wave element in which a wiring pattern is formed on a first surface, a sound absorbing agent is formed on a second surface, and the first surface is arranged to face the first surface of the wiring board.
- a conductive bonding member disposed between a wiring pattern of the wiring substrate and a wiring pattern of the functional element; a metal foil disposed on a second surface of the functional element; and the wiring board.
- a sealing member for sealing the gap while leaving a gap between the first surface of the functional element and the first surface of the functional element.
- a heat melting type member may be used as the sealing member.
- thermosetting member may be used as the sealing member.
- the electronic component of the present invention is disposed on the first surface of the wiring board, A surrounding frame-shaped member may be further provided.
- the electronic component of the present invention may be arranged such that the sealing member covers the entire second surface of the functional element.
- the electronic component of the present invention may be arranged such that the sealing member covers a part of the second surface of the functional element.
- the electronic component of the present invention may be arranged such that the sealing member exposes the entire second surface of the functional element.
- the electronic component of the present invention may further include a conductive bonding member disposed between the first surface of the wiring board and the first surface of the functional element.
- the functional element is a surface acoustic wave element, and a face is formed between a connection pattern on a first surface of the wiring board and a connection pattern on a first surface of the surface acoustic wave element.
- a conductive bonding member for bonding by a down bonding method may be further provided.
- the functional element is a quartz oscillator, and a ferrule is provided between the connection pattern on the first surface of the wiring board and the electrode on the first surface of the quartz oscillator.
- the functional element is a piezoelectric vibrator
- a face down bonding method is used between the connection pattern on the first surface of the wiring substrate and the electrode on the first surface of the piezoelectric vibrator.
- electrically connecting means for electrically connecting the wiring pattern on the first surface of the wiring substrate and the electrode on the second surface of the piezoelectric vibrator. Is also good.
- the functional element is a photopower blur having a pair of a light transmitting part and a light receiving part, and a connection pattern on a first surface of the wiring board and a first one of the photopower blurs.
- a conductive joining member that joins with a surface wiring pattern by a face-down bonding method; and a surrounding member that is disposed on the first surface of the wiring board and surrounds the photocoupler.
- a stop member is at least the surrounding member It may be arranged above.
- the wiring substrate may be a substrate that transmits light
- the functional element may be an EPROM whose first surface is a light receiving surface.
- the wiring substrate may be a substrate that transmits light
- the functional element may be a CCD whose first surface is a light receiving surface.
- the wiring substrate may be a substrate that transmits light, and a semiconductor laser whose first surface is a light emitting surface may be used as the functional element.
- the wiring substrate may be a substrate that transmits light, and a light emitting diode whose first surface is a light emitting surface may be used as the functional element.
- the method for manufacturing an electronic component according to the present invention includes the steps of: disposing a first surface of a wiring board and a first surface of a functional element to face each other; and forming a conductive film on a second surface of the functional element. Electrically connecting the conductive film and the wiring pattern on the first surface of the wiring board with a conductive substance, and sealing the gap while leaving at least a gap between the wiring board and the functional element. Sealing with a member.
- the method for manufacturing an electronic component according to the present invention includes the steps of: And a step of sealing the gap with a sealing member made of a resin in which metal powder is dispersed while leaving a gap between at least the wiring substrate and the functional element. It is characterized by having.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element. Sealing the gap with a sealing member made of a resin in which the magnetic powder is dispersed while leaving the gap.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element. Sealing the gap with a sealing member made of a resin in which a radio wave absorber material is dispersed while leaving the gap.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element. Sealing the gap with a sealing member made of a resin containing a conductive filler while leaving the gap.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element.
- a step of arranging the first surface of the wiring substrate and the first surface of the functional element to face each other includes forming a gap between at least the wiring substrate and the functional element.
- a wiring pattern provided on the inner surface of the recess and a wiring pattern provided on the tip of the projection are electrically connected to each other, and the first metal substrate is connected to the first wiring board by the metal plate. Covering the functional element. It is characterized by the following.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element.
- the method for manufacturing an electronic component according to the present invention includes a step of disposing the first surface of the wiring board and the first surface of the functional element to face each other; and a step of disposing a cushioning material on the second surface of the functional element. And sealing the gap with a sealing member while leaving a gap between at least the wiring substrate and the functional element.
- a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other includes forming a gap between at least the wiring board and the functional element. Sealing the gap with a sealing member made of a resin containing a glass filler while leaving the gap.
- the method for manufacturing an electronic component according to the present invention includes the step of disposing a bonding member for electrically connecting a wiring pattern of the wiring board and a wiring pattern of the functional element in a region near a central portion of the functional element. Arranging the first surface and the first surface of the functional element to face each other, and sealing the void while leaving at least a void between the wiring substrate and the functional element. Sealing with a member.
- the first bonding member that electrically connects the wiring pattern of the wiring board and the wiring pattern of the functional element is intensively arranged in a region near the center of the functional element
- the second bonding member which is not involved in the electrical connection between the wiring pattern of the wiring board and the wiring pattern of the functional element, is arranged in the peripheral area of the functional element while the second bonding member is in contact with the first surface of the wiring board.
- the first surface includes a first wiring pattern made of a conductive material having a first thickness and a conductive material having a second thickness larger than the first thickness.
- the first surface of the wiring substrate on which the second wiring pattern is formed and the first surface of the functional element are electrically connected between the second wiring pattern of the wiring substrate and the wiring pattern of the functional element.
- the method for manufacturing an electronic component of the present invention includes the steps of: forming a first region made of a substrate material having a first thickness and a second region made of a substrate material having a second thickness larger than the first thickness.
- the first surface of the wiring board and the first surface of the functional element may be formed by a wiring pattern of the first surface of the wiring substrate and a first surface of the functional element.
- the method for manufacturing an electronic component according to the present invention includes: a first surface of a wiring board; and a first surface of a functional element which is a surface acoustic wave element having a first surface on which a sound absorbing agent is formed.
- the sealing member is formed of a heat-melting member, and the sealing step is performed above the first surface and the Z of the wiring board or the second surface of the functional element. And a step of heating and melting the heat melting type member and sealing the gap while leaving at least a space between the wiring board and the functional element. You may do so.
- the sealing member is made of a thermosetting member, and the sealing step is performed above the first surface and the Z of the wiring board or the second surface of the functional element.
- a step of sealing the seal is made of a thermosetting member, and the sealing step is performed above the first surface and the Z of the wiring board or the second surface of the functional element.
- the sealing member is made of a thermosetting member
- the sealing step heat-curs while dropping the liquid thermosetting member at a predetermined position from above the first surface Z of the wiring substrate or the second surface of the functional element, And a step of sealing the gap while leaving a gap between the wiring substrate and the functional element.
- the method for manufacturing an electronic component according to the present invention may further include a step of arranging a frame-shaped member on the first surface of the wiring board so as to surround the gap before the facing arrangement step.
- the sealing member in the sealing step, may be formed so as to cover the entire second surface of the functional element.
- the sealing member in the sealing step, may be formed while exposing the entire second surface of the functional element.
- the sealing member in the sealing step, may be formed while exposing a part of the second surface of the functional element.
- the first surface of the wiring substrate and the first surface of the functional element may be opposed to each other via a conductive bonding member. Good.
- the functional element is a surface acoustic wave element
- the connection pattern on the first surface of the wiring board and the first surface of the surface acoustic wave element The connection pattern may be opposed to the connection pattern by a face-down bonding method via a conductive bonding member.
- the functional element is a quartz oscillator
- the connection pattern on the first surface of the wiring board and the electrode on the first surface of the quartz oscillator are And a wiring pattern on the first surface of the wiring substrate and an electrode on the second surface of the crystal unit are electrically connected by an electrical connection means.
- the method may further include a step of arranging a surrounding member on the wiring board so as to surround the crystal resonator.
- the functional element is a piezoelectric vibrator;
- the connection pattern on the first surface of the wiring board and the electrode on the first surface of the piezoelectric vibrator are opposed to each other by a face-down bonding method via a conductive bonding member, and the wiring substrate
- the wiring pattern on the first surface and the electrode on the second surface of the piezoelectric vibrator may be electrically connected by an electric connection means.
- the functional element is a photovoltaic brush having a pair of a light transmitting unit and a light receiving unit.
- the wiring pattern on each first surface of the force bra is opposed to each other by a face-down bonding method via a conductive bonding member, and thereafter, a surrounding member is disposed on the wiring board so as to surround the photo force bra. You may make it have the process of performing further.
- the wiring substrate is a substrate that transmits light
- the functional element is an EPROM
- a first surface of the wiring substrate and a light receiving surface of the EPROM are provided. May be arranged to face each other.
- the wiring substrate is a substrate that transmits light
- the functional element is a CCD
- a first surface of the wiring substrate and a light receiving surface of the CCD are provided. May be arranged to face each other.
- the wiring substrate is a substrate that transmits light
- the functional element is a semiconductor laser
- the first surface of the wiring substrate and the semiconductor laser May be arranged facing each other.
- the wiring substrate is a substrate that transmits light
- the functional element is a light emitting diode
- the facing arrangement step the first surface of the wiring substrate and the light emitting diode You may make it oppose a light emission surface.
- the functional element has a bump
- the bump of the functional element is disposed facing the wiring board in the facing step, and thereafter, the bump is provided on the wiring board and / or the bump.
- the method may further include a step of bonding the wiring substrate and the functional element while irradiating infrared rays.
- the method for manufacturing an electronic component includes the steps of: Positioning the plurality of functional elements in the device, assembling the functional element and the assembly of the wiring board at a predetermined interval via a conductive bonding member, Arranging a heat-meltable member on the assembly; heating and melting the heat-meltable member while leaving a gap between the wiring substrate and the functional element; Dividing the assembly together with the heat-melting member to obtain individual electronic components.
- the method for manufacturing an electronic component according to the present invention includes a step of locating a functional element at a predetermined position with respect to a wiring board; and maintaining a predetermined interval between the functional element and the wiring board via a conductive bonding member. And assembling; disposing a heat-meltable member on the wiring board; and heat-melting the heat-meltable member while leaving a gap between the wiring board and the functional element.
- the heat melting type member is a heat melting type flaky resin
- the step of heat melting and curing the flaky resin includes at least (1) a step of determining a resin shape by heat melting of the flaky resin; (2) a step of transitioning to a gelled state while maintaining the resin shape, (3) a step of curing the resin, and the process temperature of (2) is lower than (1) or (3). It is characterized by.
- the method for manufacturing an electronic component according to the present invention includes a step of positioning a surface acoustic wave element at a predetermined position with respect to a wiring board; and a step of positioning the surface acoustic wave element and the wiring board at a predetermined distance via a conductive bonding member. Assembling while maintaining the above, a step of disposing a heat melting type member on the wiring board, and heating and melting the heat melting type member while leaving a gap between the wiring board and the surface acoustic wave element. And forming a plurality of transducer sections and a plurality of wiring patterns electrically connected to the transducer sections on one principal surface of a wafer made of a piezoelectric material constituting the surface acoustic wave element. After forming a plurality of joining members on the upper part, when cutting to form individual surface acoustic wave elements, the speed of the blade at the time of cutting is 10ran3 ⁇ 4 / 50mn3 ⁇ 4 / sec. .
- the method for manufacturing an electronic component according to the present invention includes a step of locating a surface acoustic wave element at a predetermined position with respect to a wiring board; and Assembling while maintaining a predetermined interval, and heating and melting the wiring board A step of disposing a mold member; and a step of heating and melting the heat-melting mold member while leaving a gap between the wiring substrate and the surface acoustic wave element, thereby constituting the surface acoustic wave element.
- a plurality of transducer portions and a plurality of wiring patterns electrically connected to the transducer portions are formed on one main surface of a wafer made of a piezoelectric material, and a plurality of joining members are formed on a part of the wiring patterns, and then cut.
- the specific resistance of water used for cutting is 0.11 MQ cm or more.
- the method for manufacturing an electronic component according to the present invention includes a step of locating a functional element at a predetermined position with respect to a wiring board; and maintaining a predetermined interval between the functional element and the wiring board via a conductive bonding member. And assembling; disposing a heat-meltable member on the wiring board; and heat-melting the heat-meltable member while leaving a gap between the wiring board and the functional element. After forming the conductive bonding member on a wiring pattern formed on at least one main surface of the wiring board, a predetermined distance is maintained between the functional element and the wiring board via the conductive bonding member. It is characterized by being assembled.
- the functional element of the present invention is a functional element mounted on a substrate by a face-down bonding method, wherein a plurality of connection terminals electrically connected to the substrate are concentrated substantially at the center of one main surface of the functional element. It is characterized by being arranged.
- a functional element having a relatively elongated shape may be used as the functional element.
- a surface acoustic wave element may be used as the functional element.
- the surface acoustic wave element according to the present invention includes: a piezoelectric substrate; a plurality of pairs of comb-shaped electrodes formed on the piezoelectric substrate; and an external connection terminal provided substantially at the center of the piezoelectric substrate.
- a group may be provided.
- the surface acoustic wave element of the present invention may further include a sound absorbing agent formed on the piezoelectric substrate so as to sandwich the comb-shaped electrode.
- the surface acoustic wave device of the present invention may further comprise: Electrode pads that cannot be deposited may be provided.
- the external connection terminal group may include an external connection terminal extending to the comb-shaped electrode and electrically connected thereto.
- An imaging apparatus includes: an optical system that receives imaging light; a wiring board having a first surface and a second surface; and a first surface and a second surface. And a CCD element disposed opposite to the first surface of the wiring substrate; and a gap between the first surface of the wiring substrate and the first surface of the CCD element while leaving a gap between the CCD element and the first surface of the CCD element.
- a heat melting type member for sealing the portion, and a CCD for photoelectrically converting the imaging light incident from the optical system.
- a mobile communication device includes a wiring board having a first surface and a second surface, and a first surface and a second surface, as a bandpass filter in a radio frequency band.
- a surface acoustic wave element whose surface is arranged to face the first surface of the wiring board; and a gap between the first surface of the wiring board and the first surface of the surface acoustic wave element. It is characterized in that a surface acoustic wave filter provided with a heat melting type member for sealing the gap while leaving it is used.
- a mobile communication device includes: a wiring board having a first surface and a second surface; and a first surface and a second surface, as a bandpass filter in an intermediate frequency band.
- a surface acoustic wave element whose surface is arranged to face the first surface of the wiring board; and a gap between the first surface of the wiring board and the first surface of the surface acoustic wave element. It is characterized in that a surface acoustic wave filter provided with a heat melting type member for sealing the gap while leaving it is used.
- a mobile communication device includes, as an oscillator of an FM modulator, a wiring board having a first surface and a second surface, and a first surface and a second surface, wherein the first surface is A surface acoustic wave element arranged to face the first surface of the wiring board; and a gap between the first surface of the wiring board and the first surface of the surface acoustic wave element while leaving a gap between the first surface and the first surface of the surface acoustic wave element.
- the present invention is characterized in that a surface acoustic wave resonator provided with a heat melting type member for sealing a gap is used.
- the oscillation circuit according to the present invention includes an oscillation circuit of an RF A wiring board having a second surface; a surface acoustic wave element having a first surface and a second surface, wherein the first surface is arranged to face the first surface of the wiring substrate; A surface acoustic wave resonator provided with a heat melting type member for sealing the gap while leaving a gap between the first surface of the wiring board and the first surface of the surface acoustic wave element. It is characterized by.
- An oscillation circuit includes an oscillation circuit of an RF modulator, comprising: a wiring board having a first surface and a second surface; a first surface and a second surface; Face-down bonding between a crystal oscillator disposed to face the first surface of the wiring substrate, and a connection pattern on the first surface of the wiring substrate and an electrode on the first surface of the crystal oscillator.
- a conductive bonding member for bonding by a method an electrical connection means for electrically connecting a wiring pattern on a first surface of the wiring substrate and an electrode on a second surface of the crystal unit, and the wiring substrate
- a quartz-crystal vibrating component comprising a heat-melting member for sealing the gap while leaving a gap between the first surface of the quartz-crystal resonator and the first surface of the crystal resonator.
- the method for manufacturing an electronic component according to the present invention includes: (a) a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other; Or a step of pouring a liquid thermosetting member into a predetermined position from above the second surface of the functional element; and (c) heat-curing the poured thermosetting member, and Sealing the gap while leaving the gap between the functional element and the functional element.
- a step of positioning a functional element at a predetermined position with respect to a wiring board; and maintaining a predetermined distance between the functional element and the wiring board via a conductive bonding member An assembling step, a step of disposing a heat melting type member with respect to the wiring board, a step of heating and melting the ripening melting type member while leaving a gap between the wiring board and the functional element, Curing the heated and melted mold member, forming the conductive bonding member on a wiring pattern formed on at least one main surface of the wiring board, and then forming the functional element and the wiring It is characterized in that the substrate and the substrate are assembled while maintaining a predetermined interval via the conductive connecting member.
- the method for manufacturing an electronic component according to the present invention includes the steps of: (B) dropping a liquid thermosetting member to a predetermined position from above the first surface of the wiring substrate and / or the second surface of the functional element. Heat curing and sealing the gap while leaving a gap between at least the wiring substrate and the functional element.
- the method for manufacturing an electronic component according to the present invention includes: (a) a step of disposing the first surface of the wiring board and the first surface of the functional element to face each other; and (b) the first surface of the wiring board and the Z Or a step of disposing a heating-melting member above the second surface of the functional element; and (c) heating and melting the heating-melting member, and at least between the wiring board and the functional element. And sealing the gap while leaving the gap.
- An electronic component includes a wiring board having a first surface and a second surface, a first surface and a second surface, wherein the first surface faces the first surface of the wiring substrate.
- the first surface of the wiring board and the first surface of the functional element leaving a first void portion, and the second surface of the functional element and the heat melting.
- a matured melting mold member for sealing the first gap portion while leaving the second gap portion between the mold member and the mold member.
- the method for manufacturing an electronic component according to the present invention includes: (a) a step of arranging the first surface of the wiring board and the first surface of the functional element so as to face each other; and (b) thermosetting the bottom surface of the concave heat-fusible member. (C) applying the heat-melting mold member above the first surface and the Z of the wiring board or the second surface of the functional element with the thermosetting buffer material interposed therebetween; Disposing, and (d) heat-melting the heat-melting mold member and sealing the gap while leaving at least a gap between the wiring board and the functional element. It is characterized by.
- thermosetting buffer liquid silicone is preferable.
- An electronic component includes a wiring substrate having a first surface and a second surface, a first surface and a second surface, wherein the first surface is a first surface of the wiring substrate.
- a functional element disposed opposite to the first surface of the wiring board and a first surface of the functional element while leaving a first void portion, and a second surface of the functional element and the second surface of the functional element.
- a heating / melting member for sealing the first gap while leaving a second gap between the heating / melting member and the functional element;
- a thermosetting cushioning material interposed between the second surface of the child and the heat-fusible member.
- thermosetting buffer material liquid silicone is suitable.
- the heat-melting member may be provided with a positioning means for the functional element.
- a peripheral portion may have a drooping shape with respect to the functional element.
- the method for manufacturing an electronic component according to the present invention includes: (a) a step of disposing a first surface of a wiring board and a first surface of a functional element to face each other; and (b) a first surface on the second surface of the functional element. Disposing a cushioning material having a packing density of: (c) a second packing density higher than the first packing density above the first surface and the Z of the wiring board or the second surface of the functional element. Arranging a sealing member having a filling density; and (d) sealing the gap while leaving at least a gap between the wiring substrate and the functional element by the sealing member. It is characterized by doing.
- the method for manufacturing an electronic component according to the present invention includes: (a) a step of disposing a first surface of a wiring board and a first surface of a functional element to face each other; and (b) a first surface on the second surface of the functional element. And (c) placing the first and second surfaces above the first surface and Z of the wiring board or the second surface of the functional element. Arranging a sealing member having a third packing density higher than the packing density; and (d) forming a gap between the wiring board and the functional element by the sealing member while leaving at least a gap between the wiring substrate and the functional element. And a step of sealing.
- An electronic component includes a wiring board having a first surface and a second surface, a first surface and a second surface, wherein the first surface faces the first surface of the wiring substrate.
- a heat melting type member that seals the gap while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element; It is characterized in that it comprises a deformation preventing means for preventing deformation of the functional element in the relationship between the element and the heating / melting member.
- the deformation preventing means is a cushioning material arranged between the functional element and the heat melting type member. It is preferable that the deformation preventing means is a gap provided between the functional element and the heat melting type member.
- the deformation preventing means is preferably a large number of bubbles contained in the heat melting type member.
- the first surface of the wiring board and the first surface of the functional element are arranged to face each other at a predetermined interval, and the first surface of the wiring board is provided.
- a heat melting type member is disposed above the second surface of the functional element, the heat melting type member is heated and melted, and the heat melting type member is at least a gap between the wiring board and the functional element. While closing the gap.
- the heating and melting member a member which is melted by any kind of heating may be used.
- a member which is melted by indirect heating such as irradiation of high frequency, electromagnetic wave, ultrasonic wave, or light
- the heating may be any kind of heating, and for example, an indirect heating method such as high frequency, electromagnetic wave, ultrasonic wave, or light irradiation may be used.
- a frame-like insulating member for preventing a sealing resin having a constant viscosity from flowing into a gap formed between a functional element and a wiring board is necessarily required. Therefore, the step of forming the frame-shaped insulating member, which has been required conventionally, can be omitted, and there is an advantage that an electronic component having a simple structure can be obtained.
- a flaky resin molded as a sealing resin and joining by heating and curing it is possible to easily prevent the resin from flowing into the surface of the functional element particularly facing the void.
- the heating may be any heating, and for example, an indirect heating method such as irradiation of high frequency, electromagnetic wave, ultrasonic wave, or light may be used.
- Examples of the material of the wiring board include ceramics such as alumina, magnesia, and silicon carbide, glass-coated ceramics, ceramic multilayer boards such as alumina having conductors and functional parts incorporated therein, and glass epoxy such as FR-4.
- a fat substrate can be used.
- Examples of the functional element include a surface acoustic wave element, a crystal oscillator, a piezoelectric oscillator, a photo-power plastic having at least a pair of a light transmitting unit and a light receiving unit, an EPROM, a CCD, a semiconductor laser, or a light emitting diode. Is mentioned.
- a functional element such as a surface acoustic wave element or a semiconductor element is face-down bonded (a technique of directly turning a chip upside down and directly mounting a package without a die bonding and a wire bonding process; Daijiki “Maruzen Co., Ltd., published March 5, 1985, page 1189.)
- the face-down bonding specifically includes a so-called flip-chip method, a beam lead method, a TAB method, and a pedestal method.
- a heat melting type member for example, a thermosetting flaky resin is used as a member at the time of sealing, and the functional element and the wiring board are melted by heating to melt or cure the resin surface or the whole.
- the sealing can be performed while maintaining a gap between the main surface of the functional element facing the wiring substrate and the wiring substrate.
- the wiring board that forms part of the electronic component of the present invention can form a wiring pattern on only one main surface or on both the main surface and the other main surface depending on the mounting method. Also, for example, in a surface acoustic wave device, in order to secure a gap, a transducer portion composed of a comb-shaped electrode pattern and a wiring pattern electrically connected to the transducer portion are provided on one surface. It needs to be formed.
- the functional element and the wiring board can be joined via a conductive joining member.
- the gap of the void formed by the present invention is determined by the shape of the joining member, it is 10 to 200. It is desirable to secure ⁇ , preferably 20 to 80 / m.
- the conductive bonding member is defined as a means for electrically connecting a semiconductor laser and a wiring board and for fixing both.
- a so-called bump or conductive resin is used.
- the bumps include ball bumps and plated bumps, and the conductive resin includes a conductive paste and an anisotropic conductive resin.
- these may be used alone or in combination. These may be used in combination in combination, and these are included in the present invention. That is, in the present invention, for example, a bump and a conductive resin may be used in combination as the conductive bonding member, or a ball bump and an anisotropic conductive resin may be used in combination, for example. You may do so.
- the material for electrically connecting the wiring pattern on the wiring board to the wiring pattern on the functional element, such as a conductive bump, is made of resin ball, gold (Ai), silver (g), solder (Sn) System, Pb system, In system, etc.).
- These conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the functional element by bonding the wiring board and the functional element at a predetermined temperature and pressure. Thus, a gap is formed and secured between the functional element and the wiring board.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the bonded functional element and the wiring board are mounted on the wiring board by covering and hardening with a thermosetting resin to form the electronic component.
- a thermosetting resin used as a thermosetting resin
- the surface or the entire surface of the resin is melted by heating and cured to join the functional element and the wiring board. Therefore, the resin can be prevented from flowing into the void formed on the side of the functional element facing the wiring substrate during curing.
- a frame-shaped insulating partition or dam is not necessarily required. However, by providing a frame-shaped insulating partition, the sealing effect can be further enhanced, and this is included in the present invention.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy potting resins, have low viscosities of about 15 Pas, and even after ripening to 100-200, Since the viscosity does not increase and remains low, without the frame-shaped insulating member, there is a drawback that the functional element and the function of the functional element are impaired because it cannot flow into the void of the wiring board and maintain the void.
- a viscosity of 50 Pa ⁇ s or more is obtained. Therefore, the functional element can be easily covered.
- Such a flaky resin can be easily formed by, for example, cold-press molding a powder made from an epoxy resin into a required shape and weight.
- Heat-fused members such as flaky resin are not the main surface that forms the voids of the functional element.
- the functional element is a surface acoustic wave element
- the wiring pattern of the surface acoustic wave element. Is placed on the other main surface instead of the main surface on which is formed.
- the shape of the flaky resin is larger than the shape of the functional element and is substantially equal to or slightly smaller than the shape of the wiring board. More preferably, the shape of the flaky resin is larger than the shape of the functional element and substantially equal to the shape of the wiring board.
- the size of the functional element is 2 mm X 2 mm and the size of the wiring board is 4 mm 4 mm
- the size of the flake resin is also 4 mm X 4 mm .
- this dimension can be appropriately selected depending on the volume of the functional element and the thickness of the flaky resin.
- the heat melting type member such as a flaky resin, placed on the surface of the functional element opposite to the surface facing the void portion, adheres to or is integrated with at least the other main surface of the element by heat melting and curing.
- the surface acoustic wave element is sealed with the wiring board by encapsulating the element.
- the heat melting temperature of the heat melting mold member such as a flaky resin is 100 to 200, and the curing time is Is carried out in 20 hours to 2 hours. More preferably, after heating and melting at 110 to 170, the curing is carried out at 100 ° C to 160 on the order of 3 to 20 hours.
- a buffer material sheet having a shape smaller than the shape of the heat-meltable member is adhered to the main surface of the heat-meltable member, and the buffer material sheet surface of the heat-meltable member is wired.
- the functional element having the pattern-formed main surface is placed facing the other main surface of the functional element, and at least the other main surface of the element and the cushioning sheet are brought into close contact with each other by heat melting and curing. While enclosing the element, the element can be sealed with a wiring board.
- the cushioning material sheet include a material having high elasticity such as a rubber elastic body sheet.
- a metal foil / paraffin paper having two layers may be arranged.
- the size of the sheet of each layer is not necessarily required to be the same as long as it is smaller than the flaky resin shape, and may be any shape. With such a configuration, stress distortion of the resin caused by shrinkage during resin curing and a difference in thermal expansion can be reduced. Further, since the position of the cushioning sheet can be easily determined between the sealing resin portion and the surface acoustic wave element, productivity and reliability are improved.
- the wiring pattern from one main surface of the wiring board is exposed between the peripheral edge of the resin part and the peripheral edge of the wiring board, and the resin part covers the wiring pattern.
- the wiring pattern is continuous with the concave wiring pattern formed on the side end surface of the wiring board.
- connection portion on the circuit board and a concave wiring pattern formed on a side end surface of the wiring board are soldered. Can be easily connected.
- the height of a wiring pattern connected to a conductive bonding member serving as an electrical connection portion between a wiring board and a functional element is set to the thickness of the wiring board material or the wiring pattern.
- an electronic component of the present invention for example, a surface acoustic wave device
- when forming a wiring pattern of a wiring board at least a part of the wiring pattern is applied a plurality of times by a screen printing method using a conductive paste. It can also be baked or co-fired.
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 / zm.
- the method for manufacturing an electronic component when forming a wiring pattern on a wiring board, at least a part of the wiring pattern is separated from other parts of the wiring pattern by a film forming method such as evaporation or sputtering. Thick films can also be formed.
- This difference is preferably at least 0.5 ⁇
- a green sheet corresponding to a portion opposed to a bonding member serving as an electrical connection portion and a region in the vicinity thereof is added and fired. After that, a wiring pattern can be formed on the wiring board.
- the difference between the thickness of the portion baked with the green sheet added and the thickness of the other portion is preferably substantially in the range of 5 to 500 ⁇ ⁇ .
- a conductive bonding member serving as an electrical connection portion may be formed by stacking a plurality of conductive bumps at substantially the same position. it can.
- the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 ⁇ ⁇ .
- the thickness of the conductive pole bump can be adjusted by using a conductive pole bump as a conductive bonding member serving as an electrical connection portion, and changing the thickness of the conductive thin wire.
- the conductive bumps are more preferably ball bumps substantially composed of gold, ball bumps substantially composed of tin, and pole bumps substantially composed of lead.
- the functional material when the functional material is applied to at least one main surface of the functional element or a part of another main surface, specifically, for example, at least one main surface or another main surface of the surface acoustic wave element is applied.
- the functional material that is, the elastic surface wave absorbing material can be applied to be thinner than the thickness of the conductive bonding member.
- the method of manufacturing an electronic component according to the present invention may include a step of temporarily fixing the wiring substrate and the functional element before the step (a).
- the arrangement of the wiring board and the functional element can be finely adjusted, and therefore, the wiring board and the functional element can be accurately and vertically arranged.
- the method for manufacturing an electronic component according to the present invention may further include, prior to the step (a), a step of disposing a frame-shaped member on the first surface of the wiring board so as to surround the gap. .
- the step of arranging a frame-shaped member for preventing a resin for sealing from flowing into a void formed by the functional element and the wiring board includes at least the wiring Although it is not always necessary to seal the gap while leaving the gap between the substrate and the functional element, it has a constant viscosity by arranging the frame member so as to surround the gap. It is possible to more reliably prevent the sealing resin from flowing into the gap formed between the functional element and the wiring board.
- the frame-shaped member a frame-shaped member conventionally used can be used as it is.
- the heat melting type member in the method for manufacturing an electronic component according to the present invention, in the step (c), can be ripened and melted so as to cover the entire second surface of the functional element, Further, in the step (c), the entire second surface of the functional element is exposed. The heat melting type member can be heated and melted. Further, in the step (C), the heat melting type member can be heated and melted while exposing a part of the second surface of the functional element.
- the step (c) when the heat melting mold member is heated and melted so as to cover the entire second surface of the functional element, the second surface of the functional element can be completely protected. Further, in the step (c), when the heat melting type member is heated and melted while exposing the entire second surface of the functional element or exposing the negative part, the second surface of the functional element is exposed. Therefore, a wiring pattern is further provided here, and the electronic components can be stacked or connected to other electronic components via the wiring pattern.
- the first surface of the wiring board and the first surface of the functional element are arranged to face each other via a conductive bonding member. Can be.
- the first surface of the wiring board and the first surface of the functional element facing each other with the conductive bonding member interposed therebetween, the first surface of the wiring substrate and the first surface of the functional element are connected to each other. They can be arranged quickly and reliably.
- the joining member is defined as a means for electrically connecting the element (functional element) and the wiring board and fixing the both.
- a so-called bump or conductive resin is used.
- the bumps include ball bumps and plated bumps
- the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member for electrically connecting the wiring pattern on the wiring board to the wiring pattern on the surface acoustic wave element is made of a resin pole with conductive metal, gold (Ax), silver (g), or the like. And metal bumps made of solder (Sii, Pb, In, etc.).
- conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element by bonding the wiring board and the surface acoustic wave element at a predetermined temperature and pressure.
- a gap is formed between the surface acoustic wave element and the wiring board to play a role.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- a conductive bonding member serving as an electrical connection portion may be formed by stacking a plurality of conductive bumps at substantially the same position.
- the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 ⁇ 150.
- the thickness of the conductive ball bump can be adjusted by changing the thickness of the conductive thin wire by using a conductive ball bump as a conductive bonding member to be an electrical connection portion.
- the conductive bumps are more preferably ball bumps made of substantially gold, pole bumps made of substantially tin, pole bumps made of substantially lead, and the like.
- an elastic surface acoustic wave element is used as the functional element.
- the connection pattern on the first surface of the wiring board and the elastic surface The connection pattern on the first surface of the wave element can be opposed to the connection pattern by a face-down bonding method via a conductive bonding material.
- a flaky resin is used as a heat melting type member at the time of sealing, and the resin surface or the whole is melted and cured by heating.
- the surface acoustic wave element and the wiring board can be sealed while holding a gap between the transducer section provided on the surface acoustic wave element and the wiring board.
- a frame-shaped insulating member for preventing the heat-melting member for sealing from flowing into the gap formed by the surface acoustic wave element and the wiring board.
- the configuration of the device can be simplified.
- a heat-melting mold member for sealing for example, by using a molded flaky resin and joining by heating and curing, it is particularly easy for the resin to flow into the surface of the transducer portion of the surface acoustic wave element.
- the surface acoustic wave propagation path of the surface acoustic wave element is not adversely affected, and a void is formed between the surface acoustic wave element and the wiring board to facilitate the resin-sealed surface acoustic wave device.
- the frame-like insulating member is not necessarily used to prevent the sealing resin having a constant viscosity from flowing into the gap formed between the main surface of the surface acoustic wave element on the transducer side and the wiring board, for example.
- a surface acoustic wave device with a simple structure that can be prevented without the need Have the advantage. Since the electronic component of the present invention does not require the frame-shaped insulating member or the surrounding member, the electronic component can be downsized. Therefore, an electronic component suitable for high-density mounting can be provided. Further, according to the method for manufacturing an electronic component of the present invention, a functional element can be mounted on a wiring board without the need for a frame-shaped insulating member or a surrounding member. Can be. In addition, electronic components suitable for high-density mounting can be manufactured.
- thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is melted and cured by heating, so that the surface acoustic wave element and the wiring board are brought into contact with each other.
- the sealing is performed while maintaining a gap between the transducer section provided in the wave element and the wiring board.
- the first surface of the wiring board and the main surface of the surface acoustic wave element are arranged on the side of the transducer via the conductive bonding member.
- the main surface on the part side can be arranged quickly and reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 ⁇ .
- a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the surface acoustic wave element as the conductive bonding member, the wiring pattern on the wiring board and the surface acoustic wave element It is also possible to join the upper wiring pattern.
- annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partitions play a role in securely holding a gap formed between the surface acoustic wave element and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- a quartz oscillator is used as the functional element. In this case, in the step (a), the connection pattern on the first surface of the wiring board and the quartz oscillator are used.
- the electrode of the first surface is opposed to the electrode of the first surface of the wiring board via a conductive bonding member by a face-down bonding method, and the electrode of the second surface of the crystal unit is Further comprising a step of arranging a surrounding member on the wiring board so as to surround the crystal unit between the steps (a) and (b), In the step (b), a heat melting type member can be arranged at least on the surrounding member.
- a surrounding member is arranged around the crystal unit in order to secure the vibration of the crystal unit, and the enclosing member is disposed on the surrounding member.
- a flake-like resin is used as the ripening and melting type member, and the resin surface or the whole is melted and cured by heating to secure the vibration of the crystal oscillator and a gap between the crystal oscillator and the wiring board. It is possible to seal while holding the part.
- the bonding wire is not encapsulated in the heat-fusible member, so that the wiring pattern on the first surface of the wiring board and the gap between the crystal unit and the wiring pattern are formed.
- the electrodes formed on the surface other than the surface facing the surface can be electrically connected by an electrical connection means such as a bonding switch.
- gap part formed of a crystal oscillator and a wiring board is not necessarily needed, and a structure is simplified. be able to.
- a heat-melting mold member for sealing for example, a molded flaky resin is joined by heating and melting and hardening, so that it is particularly suitable for the gap formed by the crystal screw element and the wiring board. It is possible to easily prevent the heat melting type member from flowing in, and it is possible to perform resin sealing without causing any adverse effect on the vibration of the crystal unit.
- thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is melted and cured by heating to form a gap between the crystal unit and the wiring substrate. It is possible to seal while holding the part.
- the first surface of the wiring board and the first surface of the crystal unit to face each other via the conductive bonding member, the first surface of the wiring substrate and the first surface of the crystal unit can be quickly connected. In addition, they can be arranged reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 m, preferably 20 to 80 m. Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the electrode on the first surface of the crystal unit as the conductive bonding member, the wiring pattern on the wiring board is directly The electrode on the first surface of the crystal unit can also be joined.
- annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partitions play a role in securely holding a gap formed between the crystal unit and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- the functional element may be a piezoelectric vibrator.
- the connection pattern on the first surface of the wiring substrate and the piezoelectric vibrator The electrode on the first surface is opposed to the electrode on the first surface by a face-down bonding method via a conductive bonding member, and the wiring pattern on the first surface of the wiring board and the electrode on the second surface of the piezoelectric vibrator are connected to each other. It can be electrically connected by an electrical connection means such as a bonding wire.
- the present invention relates to a method of mounting a piezoelectric vibrator by face-down bonding, wherein, for example, a flaky resin is used as a heat melting type member at the time of sealing placed on the piezoelectric vibrator, and the resin surface or the whole is heated. Is melted and cured, whereby sealing can be performed while maintaining a gap between the piezoelectric vibrator and the wiring board.
- the piezoelectric vibrator If a cushioning material is provided between the heating and melting member at the time of sealing, the heating and melting member does not directly contact the piezoelectric vibrator, and the piezoelectric vibrator can reliably exhibit its function. . It is desirable that the cushioning material is larger than the second surface of the piezoelectric vibrator.
- the bonding wire connects the wiring pattern on the first surface of the wiring board to the electrode formed on the surface other than the surface facing the gap of the piezoelectric vibrator. Can be electrically connected.
- the present invention it is possible to simplify the configuration without necessarily requiring a frame-shaped insulating member for preventing the heat-fused mold member for sealing from flowing into the gap formed by the piezoelectric vibrator and the wiring board.
- a heat melting type member for sealing for example, a molded flake resin is heated and melted and joined by curing, thereby forming a heat melting mold in a void formed by the piezoelectric vibrator and the wiring board.
- the members can be easily prevented from flowing, and the piezoelectric vibrator can be sealed without adversely affecting the vibration.
- thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is melted and cured by heating to form a gap between the piezoelectric vibrator and the wiring substrate. It is possible to seal while holding.
- the first surface of the wiring board and the first surface of the piezoelectric vibrator in opposition via the conductive bonding member, the first surface of the wiring substrate and the first surface of the piezoelectric vibrator can be quickly connected. In addition, they can be arranged reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 / m.
- the bumps are formed by partially increasing the thickness of the wiring pattern on the wiring board or the electrode on the first surface of the piezoelectric vibrator as the conductive bonding member, the wiring pattern on the wiring board is directly An electrode on the first surface of the piezoelectric vibrator can also be joined.
- annular insulating partition wall may be formed along the inside of each joining member and / or the outside of each joining member of the trajectory formed by the plurality of joining members. These annular insulating partitions are formed in the gaps formed between the piezoelectric vibrator and the wiring board. Plays a role in ensuring that
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- the functional element may be a photo-power blur having a pair of a light transmitting unit and a light receiving unit.
- the first The connection pattern on the surface and the wiring pattern on each first surface of the photo-power blur are opposed to each other by a face-down bonding method via a conductive bonding member, and between the steps (a) and (b) And a step of arranging a surrounding member on the wiring board so as to surround the photo-power bra.
- a heat-melting member is arranged at least on the surrounding member.
- a surrounding member is disposed around the photo power bra to secure an optical path of the photo power bra, and a sealing member is disposed on the surrounding member.
- a flaky resin is used as the heat-melting type member, and the resin surface or the whole is melted and cured by heating, so that the optical path of the photo-power bra is secured and a gap is formed between the photo-power bra and the wiring board. It is possible to seal while holding the seal.
- gap part formed by a photo-force blur and a wiring board is not necessarily needed, and a structure is simplified.
- a heat-melting mold member for sealing for example, by using a molded flake resin and joining by heating and curing, the resin flows into the gap formed by the photo-force bra and the wiring board. Can be easily prevented, and resin sealing can be performed without causing an adverse effect on the optical path of the photo-power blur.
- the frame-shaped insulating member can be prevented from flowing into the space
- thermosetting flaky resin is used as a member at the time of sealing, Therefore, the resin surface or the whole is melted and hardened, so that sealing can be performed while holding a gap between the photo-force blur and the wiring board.
- the first surface of the wiring board and each first surface of the photo power blur are arranged. And can be arranged quickly and reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 / zm, preferably 20 to 80 / m.
- the bumps are formed by partially increasing the thickness of the electrode on the first surface of the wiring pattern or the wiring pattern on the wiring board as the conductive bonding member, the wiring pattern on the wiring board is directly
- the electrodes can be joined to the electrodes on each of the first surfaces of the photo force blur.
- annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partitions play a role in securely holding a gap formed between the photobra and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- the wiring substrate is a light-transmitting substrate
- the functional element is an EPROM.
- the first surface of the wiring substrate And the light receiving surface of the EPROM can be opposed to each other.
- an ultraviolet-transmitting substrate may be used so that at least the EPROM can be irradiated with ultraviolet light, and examples thereof include a glass substrate.
- the present invention relates to a method for mounting an EPROM by face-down bonding, wherein, for example, a flake-like resin is used as a heat-melting mold member at the time of sealing, and the resin surface or the whole is melted and cured by heating, thereby obtaining an EPROM.
- the wiring board and- It is designed to seal while maintaining a gap between the light receiving section of the EP ROM and the wiring board.
- a frame-shaped insulating member for preventing a heat-melting member for sealing from flowing into a gap formed between an EPROM and a wiring board it is not always necessary to provide a frame-shaped insulating member for preventing a heat-melting member for sealing from flowing into a gap formed between an EPROM and a wiring board. It can be simplified. Also, as a heat-melting mold member for sealing, for example, by using a molded flaky resin and joining by heating and curing, it is particularly easy for the resin to flow into the light receiving part of the EPROM. It is possible to easily manufacture a mounting type EPROM in which a gap is formed between the EPROM and the wiring board and which is sealed with a resin without adversely affecting the optical control of the EPROM.
- an EPROM and a wiring board are provided in the EPROM by using, for example, a thermosetting flaky resin as a member at the time of sealing, and melting and curing the resin surface or the whole by heating.
- the sealing can be performed while holding the gap between the light receiving portion and the wiring board.
- the first surface of the wiring board and the main surface of the EPROM on the light receiving section side are connected to each other. Can be arranged quickly and reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 ⁇ m, preferably 20 to 80 ⁇ m. Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the EPROM as the conductive bonding member, the wiring pattern on the wiring board and the wiring pattern on the EPROM are directly connected. And can be joined. Further, in the present invention, an annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partition walls play a role in securely holding a gap formed between the EPROM and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, the bonding strength is increased and the connection reliability is improved. Can be made.
- the wiring substrate may be a light-transmitting substrate
- the functional element may be a CCD
- the first surface of the wiring substrate and the CCD The light receiving surface can be arranged to face the light receiving surface.
- any substrate having optical flat characteristics may be used.
- an ultraviolet transmission type substrate or the like that can irradiate ultraviolet rays to the light receiving surface of the CCD may be used, and for example, a glass substrate may be used. .
- the present invention relates to a method of mounting a CCD by face-down bonding, in which, for example, a flaky resin is used as a heat-melting type member at the time of sealing, and the resin surface or the whole is melted and cured by heating, thereby obtaining a CCD. And the wiring substrate can be sealed while maintaining a gap between the light receiving portion of the CCD and the wiring substrate.
- the configuration of the CCD can be simplified. Also, as a heat-melting mold member for sealing, for example, by using a molded flaky resin and joining it by aging and curing, it is possible to easily prevent resin from flowing into the light receiving part of the CCD, in particular. This makes it possible to easily manufacture a mounted CCD in which a gap is formed between the CCD and the wiring board and sealed with resin without causing any adverse effect on the control of the CCD.
- thermosetting flaky resin is used as the sealing member, and the CCD and the wiring board are provided on the CCD by melting and curing the resin surface or the whole by heating.
- the sealing can be performed while holding a gap between the light receiving section and the wiring board.
- the first surface of the wiring board and the main surface on the light receiving portion side of the CCD are connected. They can be arranged quickly and reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive joining member, but it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 m. - Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the CCD as a conductive bonding member, the wiring pattern on the wiring board and the wiring pattern on the CCD are directly And can be joined.
- annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partitions play a role in reliably maintaining a gap formed between the CCD and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, the bonding strength can be increased and the reliability of the connection can be improved.
- the wiring substrate may be a light-transmitting substrate
- the functional element may be a semiconductor laser.
- the light emitting surface of the semiconductor laser can be arranged to face each other.
- a light-transmitting substrate may be used so that at least the laser light from the light emitting surface of the semiconductor laser is transmitted through the wiring substrate and output to the outside.
- a glass substrate may be used.
- the present invention provides a method for mounting a semiconductor laser by face-down bonding, wherein, for example, a flaky resin is used as a heat-melting mold member at the time of sealing, and the resin surface or the whole is melted and cured by heating.
- the semiconductor laser and the wiring board can be sealed while maintaining a gap between the light emitting surface of the semiconductor laser and the wiring board.
- a frame-shaped insulating member for preventing a heat melting type member for sealing from flowing into a gap formed between a semiconductor laser and a wiring board. It can be simplified.
- a molded flaky resin is used as a heat-fusible mold member for encapsulation, and is bonded by heat-melting and curing, thereby easily preventing the resin from flowing particularly into the light emitting surface of the semiconductor laser. It is possible to easily manufacture a mounting type semiconductor laser in which a gap is formed between the semiconductor laser and the wiring board and resin-sealed without causing a bad influence on the output of the semiconductor laser to the outside. it can.
- a semiconductor laser and a wiring board are provided in the semiconductor laser by using, for example, a thermosetting flaky resin as a member at the time of sealing and melting and curing the resin surface or the whole by heating.
- the sealing is performed while maintaining a gap between the light emitting unit and the wiring board.
- the first surface of the wiring board and the main surface on the light emitting portion side of the semiconductor laser are arranged.
- Surfaces can be arranged quickly and reliably.
- the space of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 m, preferably 20 to 80 m.
- a bump is formed by partially increasing the thickness of a wiring pattern on a wiring board or a wiring pattern on a semiconductor laser as a conductive bonding member, the wiring pattern on the wiring board is directly connected to the wiring pattern on the semiconductor laser. Can be joined to the wiring pattern.
- annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partitions play a role in securely holding a gap formed between the semiconductor laser and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- the wiring substrate may be a light-transmitting substrate
- the functional element may be a light-emitting diode.
- the surface and the light emitting surface of the light emitting diode can be arranged to face each other.
- a light-transmitting substrate may be used so that at least light from the light-emitting surface of the light-emitting diode passes through the wiring substrate and is output to the outside.
- a glass substrate may be used.
- a flaky resin when mounting a light emitting diode by face-down bonding, for example, a flaky resin is used as a heat melting type member at the time of sealing, and the resin surface or the whole is melted and cured by ripening. Further, the light emitting diode and the wiring board can be sealed while holding a gap between the light emitting surface of the light emitting diode and the wiring board.
- the present invention it is not always necessary to provide a frame-shaped insulating member for preventing the heat-fused mold member for sealing from flowing into the gap formed by the light emitting diode and the wiring board.
- the configuration can be simplified.
- a heat-melting mold member for sealing for example, by using a molded flaky resin and joining by heating and curing, it is possible to easily prevent the resin from flowing into the light-emitting surface of the light-emitting diode in particular.
- thermosetting flaky resin is used as a member at the time of sealing, and the surface or the whole of the resin is melted and cured by heating, so that the light emitting diode and the wiring board are connected to each other. It is possible to seal while maintaining a gap between the substrate and the wiring board.
- the first surface of the wiring board and the main surface of the light emitting diode side facing each other via the conductive bonding member By disposing the first surface of the wiring board and the main surface of the light emitting diode side facing each other via the conductive bonding member, the first surface of the wiring board and the main surface of the light emitting diode side of the light emitting diode can be separated. Can be arranged quickly and reliably.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 / zm, preferably 20 to 80 ⁇ . Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the light emitting diode as the conductive bonding member, the wiring pattern on the wiring board and the wiring pattern on the light emitting diode are directly formed. Can be joined with Wear.
- annular insulating partition wall may be formed along the inside of each joint member and / or along the outside of each joint member of the trajectory formed by the plurality of joint members.
- annular insulating partitions play a role in securely holding a gap formed between the light emitting diode and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- a bump is provided on the functional element, and at this time, the bump of the functional element is arranged to face the wiring board in the step (a), and the steps (a) and ( During the step b), the wiring board and / or the functional element can be joined while irradiating the wiring board and / or the bumps with infrared rays.
- the first surface of the wiring substrate and the first surface of the functional element By arranging the first surface of the wiring substrate and the first surface of the functional element to face each other via the bumps provided on the functional element, the first surface of the wiring substrate and the first surface of the functional element can be connected to each other. They can be arranged quickly and reliably.
- the wiring pattern on the wiring board and the wiring pattern on the functional element can be directly joined.
- a bump is defined as a means for electrically connecting a functional element and a wiring board, or for fixing both.
- Bumps include pole bumps and plated bumps, and conductive paste such as conductive paste or anisotropic conductive resin. Some bumps are used.
- the conductive bumps that can electrically connect the wiring pattern on the wiring board to the wiring pattern on the functional element include resin balls, gold (Ai), silver (), solder (Sn) System, Pb system, In system, etc.).
- These bumps fix the wiring board and the functional element by bonding the wiring board and the functional element at a predetermined temperature and pressure, and further connect the wiring pattern on the wiring board and the wiring pattern on the light emitting diode. Make an electrical connection. Then, it plays a role of forming and securing a gap between the functional element and the wiring board.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the surface of the functional element on which the bumps are not formed can be heated by infrared rays to transfer the heat to the bumps to indirectly heat the pump. Since the entire device is heated, special attention must be paid to the heating temperature and heating time.
- the surface of the functional element on which the bump is formed and the surface of the wiring board facing the functional element are directly ripened to heat and join the bump.
- the bumps are heated to a temperature sufficient to join the functional element and the wiring board, which depends on the type of the bumps, but is typically heated to several hundred degrees. Since it is preferable that heating of the bumps be performed promptly, a halogen lamp, for example, is used as the infrared light source.
- a halogen lamp for example, is used as the infrared light source.
- the gap of the void formed in the present invention is determined by the shape of the bump
- the functional element and the wiring board can be joined via the bumps, and sealing with resin can be performed.
- thermosetting resin in the method for manufacturing an electronic component according to the present invention, a resin, for example, a thermosetting resin can be used as the heat-meltable member.
- an electronic component is mounted on a wiring board by covering and bonding the bonded functional element and the wiring board with a heat-melting type member, for example, a thermosetting resin.
- a heat-melting type member for example, a thermosetting resin.
- the functional element and the wiring board are joined together, so that the viscosity of the resin can be kept high and the functional element can be cured during curing.
- the resin can be reliably prevented from flowing into the void formed on the first surface.
- the resin which is the heat melting mold member into a flake shape for example, it can be molded by a cold compression molding method.
- the ripened molten mold member is formed so as to be larger than the shape of the functional element and to have substantially the same shape as the wiring board, the positioning of the ripened molten mold member with respect to the functional element and the wiring board is performed. This can be performed reliably, and the functional element and the wiring board can be reliably sealed. Furthermore, by processing the shape of the heat melting type member before the heat melting into a shape in which the peripheral portion is hung, the functional element and the wiring substrate can be more reliably sealed.
- a concave portion can be provided on a part of the surface of the flaky resin on the functional element side.
- This recess is provided with a recess slightly larger than the outer shape of the functional element.
- a concave portion formed in the resin a concave portion is formed in two steps, a void portion is provided in advance in a narrow concave portion, and when heated and melted, a void is easily formed between the device and the cushioning material (gas ) Is also exhibited.
- the effect of the positioning or the effect of the shock absorbing material (by gas) can be obtained for the resin whose peripheral portion is hung down.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy-based potting resins, have low viscosities of about 15 Pas, and even when heated to 100 to 200 Since the viscosity does not increase and remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the gaps between the functional element and the wiring board and cannot be maintained, thereby impairing the function of the functional element.
- thermosetting resin obtained by cold-pressing a powder material into a flake having the required shape and weight
- a high-viscosity state is maintained until melting is started by heating.
- a viscosity of at least 50 Pa ⁇ s is obtained. Therefore, the functional element can be easily covered.
- thermosetting resin examples thereof include an epoxy resin, a silicone resin, and a urethane resin.
- An epoxy resin is preferred, and a phenol-based epoxy resin is more preferred.
- bisphenol A epoxy resin and phenol novolak epoxy resin are suitable for the method for producing an electronic component of the present invention.
- the flaky resin placed on a surface different from the surface facing the void of the functional element is brought into close contact with at least a surface different from the surface facing the void of the element by heating, melting, and hardening. And the functional element is sealed with the wiring board.
- the heat melting temperature of the heat melting type member for example, the flaky resin
- the curing time is from 100 to 200 hours. More preferably, after heating and melting at 110 ° C. to 170 ° C., curing (cooling) is performed at 100 ° C.
- the heating temperature and the heating time need not always be constant, and may take several forms as needed. For example, after ripening at about 160 for 3 hours, 1
- the heat-meltable member for example, the flaky resin
- low melting point glass can be used for the same purpose.
- a low-melting glass powder (frit) obtained by cold compression molding into a flake shape is used.
- a small amount of wax, polyvinyl alcohol, or the like may be used as a binder.
- the melting point of the low-melting glass is 250 to 400, more preferably 300 to 350 ° C.
- lead borosilicate glass having a melting point in the above range is suitable.
- PbO is 50 weight 0 /. The above are the most suitable.
- ZnO, Al203, Ti02, Bi203, PbF2, and those containing a small amount of CuO may be used.
- bismuth borosilicate glass may be used. These glasses can be used in combination.
- the heat melting type member for example, the low melting glass has a heat melting temperature of 250 to 400, and the curing time is one hour. Carried out in ⁇ 2 hours. More preferably, after heating and melting at 300 ⁇ : ⁇ 350, the curing is carried out for about 100-160 for about 1-20 hours.
- the heating temperature and the heating time need not always be constant, and may take several forms as needed. For example, after heating at about 300 for about 3 hours, heating at about 120 for about 3 hours can be performed. In this way, the heat melting type member, for example, the low melting point glass is melted as a whole while maintaining an appropriate viscosity, and is hardened while maintaining a reliable sealing form.
- An electronic component includes a wiring substrate having a first surface and a second surface, a first surface and a second surface, wherein the first surface is a first surface of the wiring substrate.
- a functional element disposed opposite to the heat-melting member that seals the void while leaving a void between the first surface of the wiring substrate and the first surface of the functional element. It is characterized by doing.
- the first surface of the wiring board and the first surface of the functional element are located at different positions.
- a heat-melting member is disposed opposite to the first surface of the wiring board at a predetermined interval, or a heat-melting member is disposed above the second surface of the functional element. Both seal the gap while leaving the gap between the wiring board and the functional element.
- the electronic component of the present invention it is necessary to provide a frame-shaped insulating member for preventing the heat melting type sealing member having a constant viscosity from flowing into the gap formed between the functional element and the wiring board. This eliminates the need for a frame-shaped insulating member that has been required in the past, and has the advantage that an electronic component having a simple structure can be obtained.
- Materials for the wiring board include ceramics such as alumina, magnesia, and silicon carbide; glass-coated ceramics; ceramic multilayer boards such as alumina with internal conductors and functional parts; and resins such as FR-4 and glass epoxy.
- a substrate can be used.
- the functional elements include, for example, surface acoustic wave elements, crystal oscillators, piezoelectric oscillators
- a photo power blur having a pair of a light transmitting unit and a light receiving unit; EPROM, CCD, a semiconductor laser or a light emitting diode.
- a functional element such as a surface acoustic wave element or a semiconductor element is face-down bonded (a technique of directly turning a chip upside down and directly mounting a package without a die bonding and a wire bonding process; (See page 1189, issued March 5, 1985).
- the face-down bonding specifically includes a so-called flip-chip method, a beam lead method, a TAB method, a Vestel method, and the like.
- a hot-melt type member obtained by cold-press-molding a powder raw material for example, a thermosetting flaky resin is used, and the resin surface or the whole is melted and cured by heating.
- the functional element and the wiring board are sealed while maintaining a gap between the main surface of the functional element facing the wiring board and the wiring board.
- the wiring board that constitutes a part of the electronic component of the present invention may have only one main surface, or both main surface and another main surface, or one main surface and another main surface, depending on the mounting method.
- the wiring pattern can be formed over the end face.
- the wiring pattern formed on one main surface and the other main surface can be connected through the wiring pattern on the end surface.
- a transducer part composed of a comb-shaped electrode pattern and a wiring pattern that is electrically connected to the transducer part are formed on one surface. It is necessary to do.
- the functional element and the wiring board can be joined via a joining member.
- the gap of the void is determined by the shape of the joining member, but is preferably 10 to 200 ⁇ , preferably 20 to 20 ⁇ . It is desirable to secure ⁇ 80 ⁇ .
- the conductive bonding member is defined as a means for electrically connecting an element (functional element) and a wiring board, and for fixing both.
- a so-called bump or conductive resin is used.
- the bumps include ball bumps and plated bumps, and the conductive resin includes a conductive paste and an anisotropic conductive resin.
- the electronic component of the present invention does not necessarily require a frame-shaped insulating partition or dam. However, by providing a frame-shaped insulating partition, the sealing effect can be further enhanced, and this is included in the present invention.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy potting resins, have low viscosities of about 15 Pas, and even when heated to 100 to 200
- the viscosity does not increase and the viscosity remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the gap between the functional element and the wiring board, and the gap cannot be maintained, thereby impairing the function of the functional element.
- a high-viscosity state is maintained until melting is started by heating by using, for example, a flake-shaped epoxy resin as the heat-melting mold member.
- a viscosity of at least 50 Pa ⁇ s is obtained. Therefore, the functional element is easily covered.
- Such a flaky resin must be, for example, a powdery one made from an epoxy resin. It can be easily formed by cold compression molding to the required shape and weight.
- the flaky resin placed on the surface of the functional element opposite to the surface facing the gap is heated and melted and hardened to closely adhere to at least the other main surface of the element and wrap the element. Cover and seal the surface acoustic wave element with the wiring board.
- a buffer material sheet having a shape smaller than the shape of the heat-fusible member is adhered to the main surface of the heat-fusible member, and the buffer material sheet surface of the heat-fusible member is connected to the wiring pattern
- the surface acoustic wave element having the main surface with the surface formed thereon is placed facing the other main surface, and at least the other main surface of the element and the cushioning sheet are brought into close contact with each other by heating and melting and curing.
- the element can be sealed with a wiring board.
- the cushioning material sheet include a material having high elasticity such as a rubber elastic sheet.
- a metal foil / paraffin paper having two layers may be arranged.
- the size of the sheet of each layer does not necessarily have to be the same size as long as it is smaller than the flaky resin shape, and may have any shape.
- stress distortion of the resin caused by shrinkage during curing of the resin and a difference in thermal expansion can be reduced.
- the positioning of the cushioning material sheet between the sealing resin portion and the functional element can be easily performed, which leads to an improvement in productivity and reliability.
- liquid silicone can be applied to the functional element side of the resin part, placed on the functional element so as to cover the functional element, and heated and melted to seal the functional element. . At that time, the liquid silicone becomes rubbery and functions as a cushioning material.
- a void may be provided between the resin portion and the element as a cushioning material. That is, as the material of the resin portion, the filling density of the epoxy resin may be reduced, bubbles may be left in the resin, and the void may be left even after heating and melting. Further, two layers of resin materials having different filler densities, that is, different bubble densities, may be used. In other words, it can be realized by using epoxy resin with low packing density (material with low fluidity) on the side facing the element and resin with high packing density (material with high fluidity) on the other layers. It is. The fluidity of the material used here changes the amount of the curing agent or filler. Thus, control is possible.
- the wiring pattern from one main surface of the wiring board is exposed between the peripheral edge of the resin part and the peripheral edge of the wiring board, and the resin part covers the wiring pattern.
- the wiring pattern is continuous with the concave wiring pattern formed on the side end surface of the wiring board.
- connection portion on the circuit board and the concave wiring pattern formed on the side end surface of the wiring board are easily soldered. Can be connected to
- the height of the wiring pattern to be connected to the conductive joining member which is an electrical connection portion between the wiring board and the functional element is determined by the thickness of the wiring board material or the thickness of the conductive material of the wiring pattern.
- the wiring pattern of the wiring board when forming the wiring pattern of the wiring board, at least a part of the wiring pattern may be applied a plurality of times by a screen printing method using a conductive paste, and may be baked or fired simultaneously. .
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 / zm.
- the wiring pattern of the wiring board when forming the wiring pattern of the wiring board, at least a part of the wiring pattern may be made thicker than other parts of the wiring pattern by a film forming method such as evaporation or sputtering. it can.
- This difference is preferably at least 0.5 ⁇ 3 ⁇ 4.
- the wiring board may have a structure in which a green sheet corresponding to a portion facing the joining member to be an electrical connection portion and a region in the vicinity thereof is added. May be formed. It is preferable that the difference between the thickness of the portion fired with the Darine sheet added and the thickness of the other portion is substantially in the range of 5 to 500 / ⁇ .
- the thickness of the joining member can be added to the thickness of the wiring board material or the conductive material in the wiring pattern portion. Since an appropriate amount of voids can be effectively secured, the joint strength between the surface acoustic wave element and the wiring board is sufficiently maintained, especially in the case of a surface acoustic wave element in which a surface acoustic wave absorbing material is arranged. It is possible to increase the bonding strength and the connection reliability.
- a plurality of conductive bumps can be stacked at substantially the same position as a conductive bonding member serving as an electrical connection portion, in order to secure an appropriate amount of void.
- the sum of the thicknesses of the plurality of conductive bumps is
- the thickness of the conductive ball bump can be adjusted by using a conductive pole bump as a conductive bonding member serving as an electrical connection portion and changing the thickness of the conductive thin wire.
- the conductive bumps ball bumps substantially made of gold, ball bumps substantially made of tin, ball bumps substantially made of lead, and the like are more preferable.
- the functional material is applied to at least one principal surface of the functional element or a part of another principal surface, specifically, for example, at least one principal plane or another surface of the surface acoustic wave element is applied.
- the functional material that is, the surface acoustic wave absorbing material can be applied thinner than the thickness of the conductive bonding member.
- a frame-shaped member can be arranged on the first surface of the wiring board so as to surround the void.
- the arrangement of the frame-shaped member that prevents the heat-fusible mold member for sealing from flowing into the void formed by the functional element and the wiring board is at least It is not always necessary to seal the gap while leaving a gap between the wiring substrate and the functional element. It is possible to more reliably prevent the heat melting type member for stopping from flowing into the void formed by the functional element and the wiring board.
- the frame member a frame member that has been conventionally used can be used as it is.
- the heat melting type member can be arranged so as to cover the entire second surface of the functional element, and the entirety of the second surface of the functional element can be disposed. Can be exposed. Further, a part of the second surface of the functional element can be exposed.
- the heat melting type member When the heat melting type member is disposed so as to cover the entire second surface of the functional element, the second surface of the functional element can be completely protected. Further, when the entire second surface of the functional element is exposed or a part of the functional element is exposed, the second surface of the functional element is exposed. It is also possible to stack electronic components together or to connect to other electronic components via the. Further, in the electronic component according to the present invention, a configuration may be adopted in which the first surface of the wiring board and the first surface of the functional element are opposed to each other via a conductive bonding member.
- the conductive bonding member is defined as a means for electrically connecting the functional element and the wiring board and fixing the both.
- bumps and conductive resin are used.
- the bumps include pole bumps and plated bumps, and the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member that electrically joins the wiring pattern on the wiring board to the electrode on the first surface of the surface acoustic wave element such as a conductive bump, may be made of a resin metal-plated metal (Ai) or a conductive metal.
- Metal bumps made of silver () or solder (Sn, Pb, In, etc.) are available.
- conductive bumps join the wiring board and the functional element at a predetermined temperature and pressure. This electrically connects the wiring pattern on the wiring board to the electrode on the first surface of the functional element, and serves to form and secure a gap between the functional element and the wiring board. Will be.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- a conductive bonding member serving as an electrical connection portion may be formed by stacking a plurality of conductive bumps at substantially the same position. In this case, the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 / i iri.
- the thickness of the conductive pole bump can be adjusted by using a conductive ball bump as a conductive bonding member serving as an electrical connection portion, and changing the thickness of the conductive thin wire.
- the conductive bumps are more preferably ball bumps substantially composed of gold, ball bumps substantially composed of tin, and pole bumps substantially composed of lead.
- the functional element is a surface acoustic wave element, and a face is formed between a connection pattern on a first surface of the wiring board and a connection pattern on a first surface of the surface acoustic wave element.
- a conductive bonding member arranged by a down bonding method can be provided.
- a flaky resin is used as a heat-melting type member at the time of sealing, and a gap is held between a functional element and a wiring board. It is what was sealed while doing.
- the frame-shaped insulating member which prevents the heat melting type
- thermosetting flaky resin is used as a member at the time of sealing, and a functional element and a wiring board are provided, and a gap is provided between a transducer section provided on the surface acoustic wave element and the wiring board. It is sealed while holding.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 / zm, preferably 20 to 80 m.
- a wiring pattern or a surface acoustic wave element on a wiring board may be used as the conductive bonding member.
- the bumps are formed by partially increasing the thickness of the upper wiring pattern, it is also possible to directly join the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element.
- annular insulating partition wall may be provided along the inside of each joining member and / or along the outside of each joining member of the trajectory formed by the plurality of joining members.
- annular insulating partitions play a role of securely holding a gap formed between the functional element and the wiring board.
- the functional element is a quartz oscillator, and the connection pattern on the first surface of the wiring board and the electrode on the first surface of the quartz oscillator are face-down bonding.
- a conductive wire for electrically connecting the wiring pattern on the first surface of the wiring substrate and the electrode on the second surface of the crystal unit, for example. Can be.
- the frame-shaped insulating member which prevents that the heat melting type
- the resin is particularly filled in the void formed by the crystal unit and the wiring board. It can be easily prevented from flowing in and can be sealed with resin without causing any adverse effects on the vibration of the crystal unit.
- the resin for sealing which has fixed viscosity can be prevented from flowing into the space
- thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is melted and cured by heating to form a gap between the crystal unit and the wiring substrate. Sealed while holding the part.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 / zm.
- the wiring pattern on the wiring board or the first 1492 is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 / zm.
- the wiring pattern on the wiring board can be directly joined to the electrode on the first surface of the crystal unit.
- annular insulating partition wall may be provided along the inside of each joining member and / or along the outside of each joining member of the trajectory formed by the plurality of joining members.
- annular insulating partitions play a role in securely holding a gap formed between the crystal unit and the wiring board.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- a surrounding member may be arranged on the wiring board so as to surround the crystal unit, and a heat melting type member can be arranged at least on the surrounding member. At this time, the oscillation of the crystal oscillator is completely maintained.
- the functional element may be a piezoelectric vibrator.
- the connection pattern on the first surface of the wiring board and the second piezoelectric vibrator may be formed by a face-down bonding method.
- a wire a wire.
- the present invention relates to a method of mounting a piezoelectric vibrator by face-down bonding, wherein, for example, a flaky resin is used as a heat-melting member at the time of sealing to be disposed on the piezoelectric vibrator, and It is sealed while holding a gap between them.
- a cushioning material can be provided between the piezoelectric vibrator and the resin at the time of sealing. There is no direct contact, and the piezoelectric vibrator can reliably perform its function.
- This cushioning material is desirably larger than the second surface of the piezoelectric vibrator.
- the electronic component of a simple structure does not necessarily need the frame-shaped insulating member which prevents the heat melting type
- a heat melting type member for sealing for example, a molded flaky resin is used to join by heat melting and curing, so that the resin is filled in a void formed by the piezoelectric vibrator and the wiring board. Inflow can be easily prevented, and the resin can be sealed without adversely affecting the vibration of the piezoelectric vibrator.
- thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is melted and cured by heating to form a gap between the piezoelectric vibrator and the wiring substrate. It is sealed while maintaining f.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 / z m.
- the bumps are formed by partially increasing the thickness of the wiring pattern on the wiring board or the electrode on the first surface of the piezoelectric vibrator as the conductive bonding member, the wiring pattern on the wiring board is directly An electrode on the first surface of the piezoelectric vibrator can also be joined.
- annular insulating partition wall may be provided along the inside of each conductive joining member and / or along the outside of each conductive joining member on the trajectory formed by the plurality of conductive joining members.
- annular insulating partitions play a role in securely holding a gap formed between the piezoelectric vibrator and the wiring board.
- the functional element may be a photo-power blur having a pair of a light-sending unit and a light-receiving unit.
- the connection pattern on the first surface and the photo- A conductive bonding member that opposes the wiring pattern on each first surface of the force bra; a surrounding member that surrounds the photo power bra on the wiring board; It has a member.
- a surrounding member is disposed around the photo power bra to secure an optical path of the photo power bra, and a sealing member is disposed on the surrounding member.
- a flaky resin is used as the heat-melting type member, and sealing is performed while maintaining a gap between the photo-power bra and the wiring board while securing the optical path of the photo-power bra.
- gap part formed by a photo-force blur and a wiring board is not necessarily needed, and a structure is simplified.
- a heat-melting mold member for sealing for example, a molded flaky resin is used and bonded by heat-melting and hardening, so that the optical path of the photo-force bra is not adversely affected, and the resin can be sealed. it can.
- the frame-shaped insulating member can be prevented from flowing into the space
- thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is melted and cured by heating, so that a gap is formed between the photo-force bra and the wiring board. It is sealed while holding.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 ⁇ .
- the bumps are formed by partially increasing the thickness of the electrode on the first surface of the wiring pattern or the wiring pattern on the wiring board as the conductive bonding member, the wiring pattern on the wiring board is directly And the electrodes on each first surface of the photo force bra.
- annular insulating partition wall may be provided along the inside of each conductive joining member and / or along the outside of each conductive joining member on the trajectory formed by the plurality of conductive joining members.
- the wiring substrate may be a substrate that transmits light
- the functional element may be an EP ROM.
- an ultraviolet-transmitting substrate may be used so that at least the EPROM can be irradiated with ultraviolet light, and examples thereof include a glass substrate.
- a flake-shaped resin is used as a heat-melting type member at the time of sealing, and the EP ROM and the wiring board are connected to each other with the light receiving portion of the EPROM and the wiring board. And sealed while maintaining a gap between the two.
- mold of a simple structure does not necessarily need the frame-shaped insulating member which prevents the heat melting type
- a mature curable flaky resin as a member at the time of sealing, for example, a mature curable flaky resin is used,
- the EPROM and the wiring board are sealed while holding a gap between the light receiving portion provided on the EPROM and the wiring board.
- the space of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 / zm, preferably 20 to 80 / zm. Also, when bumps are formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the EP ROM as the conductive bonding member, the wiring pattern on the wiring board and the wiring pattern on the EP ROM are directly And can be joined. Further, in the present invention, an annular insulating partition wall may be provided along the inside of each conductive joining member and / or along the outside of the conductive joining member on the trajectory formed by the plurality of conductive joining members.
- annular insulating partition walls play a role in securely holding a gap formed between the EPROM and the wiring board.
- the wiring substrate is a substrate that transmits light
- the functional element is a CCD
- a first surface of the wiring substrate a light receiving surface of the CCD.
- any substrate having optical flat characteristics may be used.
- an ultraviolet transmission type substrate or the like which can irradiate ultraviolet light to the CCD light receiving surface may be used, and examples thereof include a glass substrate.
- a flake-shaped resin is used as a heat-melting type member at the time of sealing, and the CCD and the wiring substrate are moved between the light receiving portion of the CCD and the wiring substrate.
- the sealing is carried out while maintaining the gap.
- wearing type CCD of a simple structure does not necessarily need the frame-shaped insulating member which prevents that the heat melting type
- thermosetting flaky resin is used as a member at the time of sealing, and the CCD and the wiring substrate are sealed while holding a gap between the light receiving portion provided on the CCD and the wiring substrate. It was done.
- the gap of the void formed in the present invention is determined by the shape of the conductive joining member, but it is desirable to secure 10 to 200 / xm, preferably 20 to 80 ⁇ . Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the CCD as a conductive bonding member, the wiring pattern on the wiring board and the wiring pattern on the CCD are directly And can be joined.
- annular insulating partition wall may be provided along the inside of each conductive joining member and / or along the outside of each conductive joining member on the trajectory formed by the plurality of conductive joining members.
- annular insulating partitions play a role in reliably maintaining a gap formed between the CCD and the wiring board.
- the wiring substrate is a substrate that transmits light
- the functional element is a semiconductor laser
- a first surface of the wiring substrate and a light emitting surface of the semiconductor laser are opposed to each other. Can be placed.
- a light transmission type substrate may be used so that at least the laser light from the light emitting surface of the semiconductor laser passes through the wiring substrate and is output to the outside. Glass substrate.
- a flaky resin is used as a heat-melting member at the time of sealing, and the semiconductor laser and a wiring substrate are connected to each other using a light emitting surface of a semiconductor laser. It is sealed while maintaining a gap between the substrate and the wiring board.
- gap part formed of a semiconductor laser and a wiring board is not necessarily needed, and mounting of a simple structure is carried out.
- Type semiconductor laser for example, a molded flaky resin is joined by heating and melting and hardening so as not to adversely affect the output of the semiconductor laser to the outside. A gap can be formed between them, and a resin-sealed mounting type semiconductor laser can be obtained.
- a semiconductor laser and a wiring board are provided in the semiconductor laser by using, for example, a thermosetting flaky resin as a member at the time of sealing and melting and curing the resin surface or the whole by heating. It is sealed while maintaining a gap between the light emitting unit and the wiring board.
- the gap of the void formed by the present invention is determined by the shape of the electronic component and the conductive joining member to be applied, but it should be 10 to 200 m, preferably 20 to 80 / xm. Is desirable.
- the wiring pattern on the wiring board and the wiring on the semiconductor laser are directly connected. It can be joined with a pattern.
- annular insulating partition wall may be provided along the inside of each conductive joining member and / or along the outside of each conductive joining member on the trajectory formed by the plurality of conductive joining members.
- annular insulating partitions play a role in securely holding a gap formed between the semiconductor laser and the wiring board.
- the wiring board may include a substrate that transmits light.
- the functional element may be a light emitting diode, and the first surface of the wiring substrate and the light emitting surface of the light emitting diode may be arranged to face each other.
- a light-transmitting substrate may be used so that at least light from the light-emitting surface of the light-emitting diode passes through the wiring substrate and is output to the outside.
- a glass substrate may be used.
- a flaky resin is used as a heat melting type member at the time of sealing, and a light emitting diode and a wiring board are connected to a light emitting surface of the light emitting diode. It is sealed while holding a gap between it and the wiring board.
- the frame-shaped insulating member which prevents the heat melting type
- a heat-melting mold member for sealing for example, by using a molded flaky resin and joining by heating and curing, it is possible to easily prevent the resin from flowing into the light-emitting surface of the light-emitting diode in particular.
- thermosetting flaky resin is used as a member at the time of sealing, and the surface or the whole of the resin is melted and cured by heating, so that the light emitting diode and the wiring board are illuminated by the light emitting diode. It is possible to seal while maintaining a gap between the portion and the wiring board.
- the space of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 / zm, preferably 20 to 80zm. Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the light emitting diode as the conductive bonding member, the wiring pattern on the wiring board and the wiring pattern on the light emitting diode are directly And can be joined.
- each conductive member of a locus formed by a plurality of conductive bonding members An annular insulating partition may be provided along the inside of the conductive joining member and / or along the outside of each conductive joining member.
- annular insulating partitions play a role in securely holding a gap formed between the light emitting diode and the wiring board.
- a resin for example, a thermoplastic resin or a mature curable resin can be used as the heat-meltable member.
- an electronic component is configured by mounting the bonded functional element and the wiring board on a wiring board by covering and solidifying a flaky heat-melting mold member, for example, a thermosetting resin.
- a flaky heat-melting mold member for example, a thermosetting resin.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy potting resins, have low viscosities of about 15 Pas, and even when heated to 100 to 200
- the viscosity does not increase and the viscosity remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the gap between the functional element and the wiring board, and the gap cannot be maintained, thereby impairing the function of the functional element.
- a resin for example, a thermosetting resin obtained by cold-pressing a powder material into a flake having the required shape and weight, a high-viscosity state is maintained until melting is started by heating. By controlling the curing, a viscosity of at least 50 Pa ⁇ s is obtained. For this reason, the functional element is reliably covered.
- thermosetting resin examples thereof include an epoxy resin, a silicone resin, and a urethane resin.
- An epoxy resin is preferable, and a phenol-based epoxy resin is more preferable.
- bisphenol A epoxy resin and phenol novolak epoxy resin are suitable for the electronic component of the present invention.
- the flaky resin placed on a surface different from the surface of the functional element facing the void portion has at least a surface different from the surface of the functional element facing the void portion by heating, melting and curing.
- the functional element is sealed by covering the element, and the functional element is sealed with the wiring board.
- the heat melting type member for example, the heat melting temperature of a flaky resin is
- low melting point glass can be used for the same purpose instead of resin.
- a low-melting glass powder (frit) obtained by cold compression molding into a flake shape is used.
- a trace amount of wax or polyvinyl alcohol may be used as a binder.
- the melting point of the low-melting glass is from 250 ° to 400 °, more preferably from 300 ° to 350 °, and for example, lead borosilicate glass having a melting point in the above-mentioned range is suitable.
- P b O is most suitable not less than 50 weight 0 / o.
- ZnO, Al203, Ti02, Bi2 ⁇ 3, PbF2, and those containing a small amount of CuO may be used.
- bismuth borosilicate glass may be used.
- the method for manufacturing an electronic component according to the present invention includes: a step of positioning a plurality of functional elements at a predetermined position with respect to an aggregate of a plurality of wiring boards; and a method of conductively joining the functional element and the aggregate of the wiring boards.
- a step of assembling while maintaining a predetermined interval via a member; a step of arranging a heat melting type member with respect to the assembly of the wiring board and the functional element; a gap between the wiring board and the functional element A step of heating and melting the heat melting type member while leaving a portion; and a step of dividing the aggregate of the plurality of wiring boards together with the heat melting type member to obtain individual electronic components. I do.
- a plurality of functional elements are positioned at predetermined positions with respect to an aggregate of a plurality of wiring boards, and the functional element and the aggregate of the wiring boards are separated by a predetermined distance via a conductive bonding member. Is maintained and assembled.
- a heat melting type member is disposed with respect to the assembly of the wiring substrate and the functional element, and the heat melting type member is heated and melted while leaving a gap between the wiring substrate and the functional element. .
- the assembly of the plurality of wiring boards is divided together with the heat-melting mold member to obtain a plurality of individual electronic components at once.
- a conductive bonding member and a surface acoustic wave element which is a functional element, are assembled at once on an assembly of one wiring board, and thereafter, one heat melting type member, for example, Since the flaky resin is placed and sealed, that is, so-called multi-cavity, productivity can be improved.
- the frame-shaped insulating member which prevents the heat melting type
- a flaky resin molded as a heat-melting mold member for sealing and joining by heating and curing it is easy for resin to flow into the surface of each functional element, especially facing the void. It is possible to easily produce an electronic component which is formed by forming a gap between each functional element and the wiring board and sealed with resin without causing any adverse effect on each functional element.
- Materials for the wiring board include ceramics such as alumina, magnesia, and silicon carbide; glass-coated ceramics; ceramic multilayer boards such as alumina with internal conductors and functional parts; and resins such as FR-4 and glass epoxy.
- a substrate can be used.
- the wiring board may be provided with a marker for defining a division range in preparation for division.
- the functional elements include, for example, surface acoustic wave elements, crystal oscillators, piezoelectric oscillators
- a photo power blur having a pair of a light transmitting unit and a light receiving unit; EPROM, CCD, a semiconductor laser or a light emitting diode.
- a plurality of functional elements for example, a surface acoustic wave element and a semiconductor element are face-down bonded (a technique in which a chip is turned upside down and directly mounted on a package without die bonding and wire bonding steps).
- the face-down bonding specifically includes a so-called flip-chip method, a beam lead method, a TAB method and a pedestal method.
- thermosetting flaky resin is used as a member at the time of sealing, and the functional surface and the wiring board are melted and cured by heating so that each functional element and the wiring board are connected to each other. Between the main surface of each opposing functional element and the wiring board W 702
- the sealing can be performed while maintaining the gap.
- a wiring pattern is formed on only one main surface or on both the main surface and the other main surface, depending on the mounting method, on each of the wiring boards that constitute a part of the electronic component of the present invention. can do. Also, for example, in the case of a surface acoustic wave device, in order to secure a void portion, a transducer portion composed of a comb-shaped electrode pattern and a wiring pattern electrically connected to the transducer portion should be formed on one surface. Is required.
- the gap of the void formed by the present invention is determined by the shape of the joining member. It is desirable to ensure 0 ⁇ , preferably 20 to 80 ⁇ .
- the joining member is defined as a means for electrically connecting an element (functional element) and a wiring board, and for fixing both.
- a so-called bump or conductive resin is used.
- the bumps include ball bumps and plated bumps, and the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member that electrically joins a wiring pattern on a wiring board to a wiring pattern on an element (functional element), such as a conductive bump, includes a resin ball, gold ( ⁇ ), silver (fig), There are metal bumps made of solder (Sn, Pb, In, etc.).
- conductive bumps electrically connect the wiring pattern on the wiring board to the wiring pattern on the element (functional element) by bonding the wiring board and the element (functional element) at a predetermined temperature and pressure. In addition, it plays a role of forming and securing a gap between the element (functional element) and the wiring board. In order to secure a certain gap, a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- each of the bonded functional elements and the wiring board are mounted on the wiring board by covering with a single thermosetting resin, and the electronic component is divided. At this time, for example, it is molded into flakes as thermosetting resin.
- the viscosity of the resin can be maintained at a high level.
- the resin can be prevented from flowing into the void formed on the side of the functional element facing the wiring board.
- a frame-shaped insulating partition or dam is not necessarily required. However, by providing the frame-shaped insulating partition, the sealing effect can be further enhanced, and this is included in the present invention.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy-based potting resins, have low viscosities of about 15 Pa ⁇ s, so even if they are heated to 100 to 200 Since the viscosity does not increase and remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the functional element and the wiring board and the gap cannot be maintained, thereby impairing the function of the functional element.
- a high viscosity state is maintained until melting is started by heating, and curing is performed after melting.
- a viscosity of 5 O Pa ⁇ s or more is obtained. For this reason, each functional element can be easily covered.
- Such a flaky resin can be easily formed by, for example, cold-press molding a powder made from an epoxy resin into a required shape and weight.
- the flaky resin is not the main surface that forms the void of the functional element.
- each functional element is a surface acoustic wave element
- the wiring pattern of each surface acoustic wave element is formed. It is placed on the other main surface side instead of the main surface.
- the shape of the flaky resin that is substantially equal to or slightly smaller than the shape of the divided wiring board. More preferably, the shape of the flaky resin is substantially equal to the shape of the wiring board before the division.
- the selection of this dimension can be appropriately selected depending on the total volume of each functional element and the thickness of the flaky resin.
- the flaky resin which is a hot-melt mold member placed on the surface of each functional element on the side opposite to the surface facing the gap, is heated at least to the other main surface of the element by heating and melting.
- the functional element is sealed by covering the element and sealing the functional element with the wiring board.
- the heat melting temperature of the flaky resin is 100 to 200, and the curing time is 20 hours to 2 hours. Implemented in time. More preferably, after heating and melting at 110 ° C. to 170 ° C., the curing is performed at about 100 to 160 for 3 to 20 hours.
- a buffer material sheet having a shape smaller than the shape of the heat-meltable mold member is adhered to one main surface of the heat-meltable mold member to absorb the shock of the heat-meltable mold member.
- the surface of the material sheet is placed facing the other main surface of each surface acoustic wave element having a main surface on which a wiring pattern is formed, and at least the other main surface of each element is heated and melted and cured.
- the cushioning material sheet may be in close contact with each other to cover each element, and the wiring board may seal each element.
- a material having high elasticity such as a rubber elastic sheet can be used.
- two layers of metal foil / paraffin paper may be arranged. In this case, the size of the sheet of each layer is not necessarily required to be the same as long as the shape is smaller than the shape of the heat melting type member, and may be any shape.
- the height of a wiring pattern connected to a conductive bonding member serving as an electrical connection portion between a wiring board and each functional element is determined by the thickness of the wiring board material or the conductive material of the wiring pattern.
- the thickness By controlling the thickness by partially changing the thickness, or by controlling the height itself of the conductive bonding member that becomes the electrical connection portion, an appropriate amount of gap between each functional element and the wiring board can be obtained.
- the functional element is, for example, a surface acoustic wave element in which a surface acoustic wave absorbing material is arranged, the bonding strength between each surface acoustic wave element and the wiring board can be sufficiently maintained. To improve connection reliability Can be up.
- an electronic component of the present invention for example, a surface acoustic wave device
- when forming a wiring pattern of a wiring board at least a part of the wiring pattern is applied a plurality of times by a screen printing method using a conductive paste. It can also be baked or co-fired.
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 ⁇ .
- the method for manufacturing an electronic component when forming a wiring pattern on a wiring board, at least a part of the wiring pattern is separated from other parts of the wiring pattern by a film forming method such as evaporation or sputtering. Thick films can also be formed.
- This difference is preferably at least 0.5 / mi3 ⁇ 4.
- a green sheet corresponding to a portion opposed to a bonding member serving as an electrical connection portion and a region in the vicinity thereof is added and fired. After that, a wiring pattern can be formed on the wiring board.
- the difference between the thickness of the portion to which the green sheet is added and fired and the thickness of the other portion is preferably substantially in the range of 5 to 500 ⁇ .
- the thickness of the joining member is small, it can be added to the thickness of the wiring board material or conductive material of the wiring pattern portion.
- the bonding strength between the surface acoustic wave element and the wiring board can be maintained sufficiently, the connection strength can be increased, and the connection reliability can be increased.
- a plurality of conductive bumps stacked at substantially the same position can be used as a conductive bonding member serving as an electrical connection portion.
- the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 ni.
- a conductive pole bump is used as a conductive bonding member serving as an electrical connection portion, and the conductive ball The thickness of the bump can be adjusted by changing the thickness of the conductive thin wire.
- the conductive bumps are more preferably ball bumps substantially composed of gold, ball bumps substantially composed of tin, pole bumps substantially composed of lead, and the like.
- the functional material when the functional material is applied to at least one principal surface of each functional element or a part of another principal surface, specifically, for example, at least one principal plane or another principal surface of each surface acoustic wave element is applied.
- the functional material that is, the surface acoustic wave absorbing material can be applied to be thinner than the thickness of the conductive bonding member.
- the method for manufacturing an electronic component according to the present invention includes a step of locating a functional element at a predetermined position with respect to a wiring board; and maintaining a predetermined interval between the functional element and the wiring board via a conductive bonding member. And assembling; disposing a heat-meltable member on the wiring board; and heat-melting the heat-meltable member while leaving a gap between the wiring board and the functional element.
- the heat melting type member is a heat melting type flaky resin
- the steps relating to heat melting and curing of the flaky resin include at least (1) determining a resin shape by heat melting of the flaky resin. (2) transitioning to a gelled state while maintaining the resin shape, (3) curing the resin, and wherein the process temperature of (2) is lower than (1) or (3). It is characterized by the following.
- the functional element is arranged at a predetermined position with respect to the wiring board.
- the functional element and the wiring board are assembled with a predetermined distance therebetween via a conductive bonding member, and the hot-melt flaky resin is disposed on the wiring board.
- the heat-melt flaky resin is heat-melt-hardened while leaving a gap between the wiring substrate and the functional element.
- the ripening / melting / curing process involves a plurality of temperature conditions, that is, (1) a step of determining the resin shape by heating and melting the flaky resin, and (2) a gelation state while maintaining the resin shape. At least the transition stage, (3) the stage of curing the resin, is controlled so that the temperature of (2) is the lowest. In this way, by providing a plurality of stepwise temperature conditions in the heat melting / curing process, the functional element and the wiring board are prevented from flowing into the void formed between the functional element and the wiring board. Can be reliably sealed.
- a frame-like insulating member for preventing a sealing resin having a constant viscosity from flowing into a gap formed between a functional element and a wiring board is necessarily required. Therefore, the step of forming the frame-shaped insulating member, which has been required conventionally, can be omitted, and there is an advantage that an electronic component having a simple structure can be obtained.
- a flaky resin molded as a sealing resin and bonding by heating and curing it is possible to easily prevent the resin from flowing into the surface of the functional element particularly facing the void.
- Examples of the material of the wiring board include ceramics such as alumina, magnesia, and silicon carbide, glass-coated ceramics, ceramic multilayer boards such as alumina having conductors and functional parts incorporated therein, and glass epoxy such as FR-4.
- a fat substrate can be used.
- Examples of the functional element include a surface acoustic wave element, a crystal oscillator, a piezoelectric oscillator, a photo power blur having a pair of light transmitting and receiving parts, an EPROM, a CCD, a semiconductor laser, or a light emitting diode. No.
- a functional element such as a surface acoustic wave element or a semiconductor element is face-down bonded (a technique of directly flipping a chip upside down without a die bonding and wire bonding process and directly attaching the chip to a package).
- the face-down bonding specifically includes a so-called flip-chip method, a beam lead method, a TAB method, a pedestal method, and the like.
- a hot-melt type member obtained by cold-press-molding a powder raw material, for example, a thermosetting flaky resin is used, and the resin surface or the whole is melted and cured by heating.
- the functional element and the wiring board can be sealed while maintaining a gap between the main surface of the functional element facing the wiring board and the wiring board. It was done.
- the wiring board that forms part of the electronic component of the present invention can form a wiring pattern on only one main surface or on both the main surface and the other main surface depending on the mounting method. Also, for example, in a surface acoustic wave device, in order to secure a void portion, a transducer portion composed of a comb-shaped electrode pattern and a wiring pattern electrically connected to the transducer portion are formed on one surface. Is necessary.
- the functional element and the wiring board can be joined by interposing a joining member.
- the gap of the void formed by the present invention is determined by the shape of the joining member, but is 10 to 200 ⁇ m. It is desirable to secure 20 to 80 / zm.
- the joining member is defined as a means for electrically connecting an element (functional element) and a wiring board, and for fixing both.
- a so-called bump or conductive resin is used.
- the bumps include ball bumps and plated bumps
- the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member that electrically connects a wiring pattern on a wiring board to a wiring pattern on an element (functional element), such as a conductive bump, is made of a resin metal plated with conductive metal such as gold (Ai) or silver (g). ) And metal bumps made of solder (Sn, Pb, In, etc.).
- conductive bumps electrically connect the wiring pattern on the wiring board to the wiring pattern on the element (functional element) by bonding the wiring board and the element (functional element) at a predetermined temperature and pressure. In addition, it plays a role of forming and securing a gap between the element (functional element) and the wiring board. In order to secure a certain gap, a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the functional component and the wiring substrate are mounted on the wiring substrate by covering the flakes with, for example, a thermosetting resin to form the electronic component. Occasionally, epoki's flakes are formed as mature hardening resin.
- the functional element When the functional element is bonded to the wiring board by melting the surface or the entire surface of the resin by heating using a silicone resin and hardening, the viscosity of the resin can be kept high, and the wiring of the functional element during curing can be maintained. It is possible to prevent the resin from flowing into the gap formed on the side facing the substrate. Also, since it is not a liquid resin, a frame-shaped insulating partition or dam is not necessarily required. However, by providing a frame-shaped insulating partition, the sealing effect can be further enhanced, and this is included in the present invention.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy potting resins, have low viscosities of about 15 Pas, and even when heated to 100 to 200
- the viscosity does not increase and the viscosity remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the gap between the functional element and the wiring board, and the gap cannot be maintained, thereby impairing the function of the functional element.
- a high-viscosity state is maintained until melting is started by heating by using a flake-shaped example, for example, an epoxy-based resin, and even after melting.
- a flake-shaped example for example, an epoxy-based resin
- a viscosity of 50 Pa ⁇ s or more is obtained. Therefore, the functional element can be easily covered.
- Such a flaky resin can be easily formed by, for example, cold-press molding a powder made from an epoxy resin into a required shape and weight.
- the flaky resin is formed on another main surface other than the main surface forming the void portion of the functional element, for example, when the functional element is a surface acoustic wave element, the main surface on which the wiring pattern of the surface acoustic wave element is formed. Instead, it is mounted on other main surfaces.
- the shape of the flaky resin is larger than the shape of the functional element and is substantially equal to or slightly smaller than the shape of the wiring board. More preferably, the shape of the flaky resin is larger than the shape of the functional element and substantially equal to the shape of the wiring board. By doing so, the positioning of the flaky resin with respect to the functional element and the wiring board can be ensured. Further, it is preferable that the shape of the flaky resin is a shape in which the periphery thereof is hung down, because the sealing between the functional element and the wiring board can be more reliably performed. For example, if the dimensions of the functional element are 2 mm x 2 mm and the dimensions of the wiring board are 4 mm x 4 mm, the dimensions of the flaky resin are also 4 mm x 4 mm. Can be
- this dimension can be appropriately selected depending on the volume of the functional element and the thickness of the flaky resin.
- the flaky resin placed on the surface of the functional element on the side opposite to the surface facing the void portion is brought into close contact with at least the other main surface of the element by heating and melting, and covers the element. Then, the functional element is sealed with the wiring board. .
- thermosetting resin examples thereof include an epoxy resin, a silicone resin, and a urethane resin.
- An epoxy resin is preferred, and a phenol-based epoxy resin is more preferred.
- bisphenol A epoxy resin / phenol nopolak epoxy resin is suitable for the method for producing an electronic component of the present invention.
- the flaky resin placed on a surface different from the surface facing the void of the functional element is closely adhered to at least a surface different from the surface facing the void of the element by heating, melting and curing.
- the element is covered and the functional element is sealed with the wiring board.
- the gelation temperature is 90 to 15
- the gelation temperature is 90 to 15
- curing is carried out at about 100 ° C. to about 160 for 3 hours to 20 hours.
- a buffer material sheet having a shape smaller than the shape of the heat melting type member is adhered to the main surface of the heat melting type member to absorb the heat melting type member.
- the material sheet surface is placed facing the other main surface of the surface acoustic wave device having the main surface on which the wiring pattern is formed, and at least the other main surface of the device is heated and melted and cured.
- the cushioning material sheet are closely attached to cover the element, and the element can be sealed with a wiring board.
- the cushioning material sheet include a material having high elasticity, such as a rubber elastic sheet.
- two layers of metal foil / paraffin paper may be arranged.
- the size of the sheet of each layer is not necessarily required to be the same size as long as it is smaller than the flaky resin shape, and may be any shape. With such a configuration, it is possible to reduce stress distortion of the resin caused by shrinkage and thermal expansion difference during resin curing. Further, since the cushioning material sheet can be easily positioned between the sealing resin portion and the surface acoustic wave element, productivity and reliability are improved.
- the wiring pattern from one main surface of the wiring board is exposed between the peripheral edge of the resin portion and the peripheral edge of the wiring board. In this case, it is possible to prevent the resin portion from covering the wiring pattern. In this case, the wiring pattern is continuous with the concave wiring pattern formed on the side end surface of the wiring board.
- connection portion on the circuit board and the concave wiring pattern formed on the side end surface of the wiring board are easily soldered. Can be connected.
- the height of a wiring pattern connected to a conductive bonding member serving as an electrical connection portion between a wiring board and a functional element is set to a thickness of a wiring board material or a wiring pattern.
- an electronic component of the present invention for example, a surface acoustic wave device
- when forming a wiring pattern of a wiring board at least a part of the wiring pattern is applied a plurality of times by a screen printing method using a conductive paste. It can also be baked or co-fired.
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 m.
- a film forming method such as evaporation or sputtering. Thick films can be formed.
- This difference is preferably at least 0.5 / ⁇ ⁇ .
- a green sheet corresponding to a portion opposed to a bonding member serving as an electrical connection portion and a region in the vicinity thereof is added and fired. After that, a wiring pattern can be formed on the wiring board.
- the difference between the thickness of the portion fired by adding the green sheet and the thickness of the other portion is substantially in the range of 5 to 500 ⁇ ⁇ .
- a plurality of conductive bumps stacked at substantially the same position can be used as a conductive bonding member serving as an electrical connection portion.
- the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 / ⁇ ⁇ .
- the thickness of the conductive ball bump can be adjusted by changing the thickness of the conductive thin wire by using a conductive ball bump as a conductive bonding member to be an electrical connection portion.
- the conductive bumps are more preferably ball bumps substantially made of gold, ball bumps substantially made of tin, and ball bumps substantially made of lead.
- the functional material when the functional material is applied to at least one main surface of the functional element or a part of another main surface, specifically, for example, at least one main surface or another main surface of the surface acoustic wave element is applied.
- the functional material that is, the elastic surface wave absorbing material can be applied to be thinner than the thickness of the conductive bonding member.
- the method for manufacturing an electronic component according to the present invention includes a step of positioning a surface acoustic wave element at a predetermined position with respect to a wiring board; and a step of positioning the surface acoustic wave element and the wiring board at a predetermined distance via a conductive bonding member. Assembling while maintaining the above, a step of disposing a heat melting type member on the wiring board, and heating and melting the heat melting type member while leaving a gap between the wiring board and the surface acoustic wave element. And forming a plurality of transducer portions and a plurality of wiring patterns electrically connected to the transducer portions on one main surface of the piezoelectric device comprising the piezoelectric material constituting the surface acoustic wave element. After forming multiple joining members on the upper part, when cutting to form individual surface acoustic wave elements, the blade speed at cutting is 50 mn ⁇ below lOrrn ⁇ per second. To be .
- the surface acoustic wave element is positioned at a predetermined position with respect to the wiring board.
- a transducer portion and a plurality of wiring patterns electrically connected to the transducer portion are formed on one main surface of a wafer made of a piezoelectric material constituting a surface acoustic wave element, and a part of this wiring pattern is formed.
- a plurality of joining members are formed.
- the surface acoustic wave element and the wiring board are assembled while maintaining a predetermined interval via the joining member.
- a heat melting type member is disposed on the wiring substrate, and the heat melting type member is heated and melted while leaving a gap between the wiring substrate and the surface acoustic wave element.
- the surface is cut by a blade adjusted so that the speed of movement is lOmn ⁇ above 50im ⁇ below per second according to the plurality of formed wiring patterns, and individual surface acoustic wave devices are formed.
- a cutting member such as a diamond cutter can be appropriately used.
- a plurality of transducer sections and a wiring pattern electrically connected to the transducer sections are formed on one piezoelectric body, and a conductive bonding member and a surface acoustic wave element are assembled at once. Since a plurality of surface acoustic wave devices are obtained by mounting and sealing the flaky resin and cutting the resin, productivity can be improved.
- the frame-shaped insulating member for preventing the heat-fusible mold member for sealing from flowing into each gap formed by the surface acoustic wave element and the wiring board is not necessarily provided. Since it is not required, the step of forming a frame-shaped insulating member, which has been required conventionally, can be omitted, and there is an advantage that a plurality of electronic components having a simple structure can be obtained at one time.
- the fusible resin molded as a sealing heat melting member is joined by heat melting and curing, so that the heat melting member flows into the surface of the surface acoustic wave element facing the void.
- Materials for the wiring board include ceramics such as alumina, magnesia, and silicon carbide; glass-coated ceramics; ceramic multilayer boards such as alumina with internal conductors and functional parts; and resins such as FR-4 and glass epoxy.
- a substrate can be used.
- the wiring board may be provided with a marker for defining a division range in preparation for division.
- the surface acoustic wave element is subjected to face-down bonding (a technique of directly flipping a chip upside down without a die bonding and a wire bonding process and directly attaching to a package, “Dictionary of Science” Maruzen Co., Ltd.) (See page 1189, issued March 5, 1960).
- the face down bonding specifically includes a so-called flip chip method, a beam lead method, a TAB method and a pedestal method.
- a thermosetting flaky resin is used as a member at the time of sealing, and the resin surface or the whole is cured by ripening. By melting and curing the body, the surface acoustic wave element and the wiring board can be sealed while maintaining a gap between the main surface of the surface acoustic wave element facing the wiring board and the wiring board. It was done.
- a wiring pattern is formed on only one main surface or on both the main surface and the other main surface, depending on the mounting method, on each of the wiring boards that constitute a part of the electronic component of the present invention. can do. Also, in a surface acoustic wave device, it is necessary to form a transducer section composed of a comb-shaped electrode pattern and a wiring pattern electrically connected to the transducer section on one surface in order to secure a gap. .
- the surface acoustic wave element and the wiring board can be joined via a conductive joining member.
- the gap of the void formed by the present invention is determined by the shape of the conductive joining member. It is desirable to secure 0 to 200 / m, preferably 20 to 80 ⁇ .
- the conductive bonding member is defined as a means for electrically connecting the surface acoustic wave element and the wiring board and for fixing the both.
- a so-called bump or conductive resin is used.
- the bumps include ball bumps and plated bumps, and the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member for electrically connecting a wiring pattern on a wiring board to a wiring pattern on a surface acoustic wave element for example, a conductive bump may be made of a resin ball or a gold plated with a conductive metal.
- Metal bumps made of ( ⁇ ), silver (g), solder (Sn, Pb, In, etc.).
- conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element by joining the wiring board and the surface acoustic wave element at a predetermined temperature and pressure. At the same time, a gap is formed between the surface acoustic wave element and the wiring board to play a role of securing the gap.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the surface acoustic wave element and the wiring board that are joined are covered with a heat-melting member, and are mounted on a wiring board, and divided to form a surface acoustic wave device.
- the surface or the entire surface of the resin is melted and cured by heating using a flake-shaped epoxy resin as a heat melting type member, and the surface acoustic wave element and the wiring board are cured.
- the viscosity of the resin can be kept high, and the resin can be prevented from flowing into the void formed on the side of the surface acoustic wave element facing the wiring substrate during curing.
- a frame-shaped insulating partition or dam is not necessarily required. However, by providing the frame-shaped insulating partition, the sealing effect can be further enhanced, and this is included in the present invention.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy-based potting resins, have low viscosities of about 15 Pas, and even when heated to 100 to 200 Since the viscosity does not increase and remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the gaps between the functional element and the wiring board and cannot be maintained, thereby impairing the function of the functional element.
- a high-viscosity state is maintained until melting is started by heating, and even after melting.
- a viscosity of 50 Pa ⁇ s or more is obtained. Therefore, the surface acoustic wave element can be easily covered.
- Such a flaky resin can be easily formed by, for example, cold-press molding a powder of epoxy resin as a raw material into a required shape and weight.
- the flaky resin is placed on another main surface other than the main surface forming the void portion of the surface acoustic wave element, that is, on the other main surface side, not the main surface on which the wiring pattern of the surface acoustic wave element is formed. .
- the shape of the flaky resin that is substantially equal to or slightly smaller than the shape of the divided wiring board. More preferably, the shape of the flaky resin is substantially equal to the shape of the wiring board before the division.
- the flaky resin surface acoustic wave element and the wiring before division can be obtained. Positioning with respect to the substrate can be ensured.
- this dimension can be appropriately selected depending on the total volume of the surface acoustic wave element and the thickness of the flaky resin.
- the flaky resin placed on the surface of the surface acoustic wave element on the side opposite to the surface facing the void portion is brought into close contact with at least the other main surface of the element by heating and melting and hardening thereof. And the surface acoustic wave element is sealed with the wiring board.
- the heat melting temperature of the flaky resin is 100 to 200 ⁇
- the curing time is 20 hours to Will be implemented in 2 hours. More preferably, after heating and melting at 110 to 170 t, the curing is performed at about 100 to 160 for 3 hours to 20 hours.
- a buffer material sheet having a shape smaller than the shape of the heat-meltable member is adhered to one main surface of the heat-meltable member.
- the surface of the material sheet is placed facing the other main surface of the surface acoustic wave element having the main surface on which the wiring pattern is formed, and at least the other elements of the above elements are heated and melted and cured.
- the main surface of the substrate and the cushioning material sheet are in close contact with each other to cover the surface acoustic wave element, and the surface acoustic wave element can be sealed with the wiring board.
- the cushioning material sheet include a material having high elasticity such as a rubber elastic sheet.
- two layers of metal foil / paraffin paper may be arranged.
- the size of the sheet of each layer is not necessarily required to be the same as long as it is smaller than the flaky resin shape, and may be any shape. With such a configuration, it is possible to reduce stress distortion of the resin caused by shrinkage and thermal expansion difference during resin curing.
- the cushioning sheet can be easily positioned between the sealing resin portion and the surface acoustic wave element, productivity and reliability are improved.
- the height of a wiring pattern connected to a conductive bonding member that is an electrical connection portion between a wiring board and a surface acoustic wave element is determined by the thickness of the wiring board material or the conductivity of the wiring pattern. It is controlled by changing the thickness of the material partly, or by controlling the height itself of the conductive joining member that will be the electrical connection. Therefore, an appropriate amount of gap between the surface acoustic wave element and the wiring board can be effectively secured, so that even if the surface acoustic wave element is provided with a surface acoustic wave absorbing material, The bonding strength between the substrate and the substrate can be sufficiently maintained, and the reliability of the connection can be improved.
- the method for manufacturing an electronic component and a surface acoustic wave device when forming a wiring pattern of a wiring board, at least a part of the wiring pattern is applied a plurality of times by a screen printing method using a conductive paste. It can be baked or co-fired.
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 / zm.
- the method for manufacturing an electronic component when forming a wiring pattern on a wiring board, at least a part of the wiring pattern is separated from other parts of the wiring pattern by a film forming method such as evaporation or sputtering. Thick films can also be formed.
- This difference is preferably at least 0.5 ⁇ 3 ⁇ 4.
- a green sheet corresponding to a portion opposed to a bonding member serving as an electrical connection portion and a region in the vicinity thereof is added and fired. After that, a wiring pattern can be formed on the wiring board.
- the difference between the thickness of the portion fired with the Darine sheet added and the thickness of the other portion is preferably substantially in the range of 5 to 500 ⁇ 7).
- the bonding strength between the surface acoustic wave device and the wiring board can be increased, especially in the case of a surface acoustic wave device in which a surface acoustic wave absorbing material is arranged. Can be maintained sufficiently, so that bonding strength can be increased and connection reliability can be increased.
- a plurality of conductive bumps are provided at substantially the same position as a conductive bonding member serving as an electrical connection portion. Stacked ones can also be used.
- the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 / i iri.
- a conductive ball bump can be used as a conductive bonding member serving as an electrical connection portion, and the thickness of the conductive pole bump can be adjusted by changing the thickness of the conductive thin wire.
- the conductive bumps ball bumps substantially made of gold, ball bumps substantially made of tin, ball bumps substantially made of lead, and the like are more preferable.
- the functional material that is, the surface acoustic wave absorbing material is thinner than the thickness of the conductive bonding material. Can be applied.
- the thickness of the conductive bonding member serving as an electrical connection portion an appropriate amount of a gap between the surface acoustic wave element and the wiring board can be effectively secured.
- it is not necessary to partially change the thickness of the wiring board or the thickness of the conductive material it is easier to manufacture a plurality of electronic components.
- the method for manufacturing an electronic component according to the present invention includes a step of positioning a surface acoustic wave element at a predetermined position with respect to a wiring board; and a step of positioning the surface acoustic wave element and the wiring board at a predetermined distance via a conductive bonding member. Assembling while maintaining the above, a step of disposing a heat melting type member on the wiring board, and heating and melting the heat melting type member while leaving a gap between the wiring board and the surface acoustic wave element. And forming a plurality of transducer sections and a plurality of wiring patterns electrically connected to the transducer sections on one principal surface of a wafer made of a piezoelectric material constituting the surface acoustic wave element. After forming a plurality of joining members on the upper part, when cutting to form individual surface acoustic wave elements, the specific resistance of water used for cutting is more than 0.11 ⁇ m
- the surface acoustic wave element is positioned at a predetermined position with respect to the wiring board.
- a transducer part and a plurality of wiring patterns electrically connected to the transducer part are formed on one main surface of a wafer made of a piezoelectric material constituting a surface acoustic wave element, and a part of this wiring pattern is formed.
- a plurality of joining members are formed.
- the surface acoustic wave element and the wiring board are separated by a predetermined distance through the joining member. Is maintained and assembled.
- a heat melting type member is disposed on the wiring substrate, and the heat melting type member is heated and melted while leaving a gap between the wiring substrate and the surface acoustic wave element.
- the individual surface acoustic wave devices are cut by water adjusted so that the specific resistance is between 0.01 MQcm and 100 MQcm, corresponding to the plurality of formed wiring patterns. It is formed.
- a plurality of transducer sections and a wiring pattern electrically connected to the transducer sections are formed on one piezoelectric body, and a conductive bonding member and a surface acoustic wave element are assembled at once. Since a plurality of surface acoustic wave devices are obtained by mounting and sealing the flaky resin and cutting the resin, productivity can be improved.
- the frame-shaped insulating member for preventing the heat-fusible mold member for sealing from flowing into each gap formed by the surface acoustic wave element and the wiring board is not necessarily provided. Since it is not required, the step of forming a frame-shaped insulating member, which has been required conventionally, can be omitted, and there is an advantage that a plurality of electronic components having a simple structure can be obtained at one time.
- the fusible resin molded as a sealing heat melting member is joined by heat melting and curing, so that the heat melting member flows into the surface of the surface acoustic wave element facing the void.
- the surface acoustic wave device can be easily prevented, and the surface acoustic wave device is not adversely affected, and a gap is formed between the surface acoustic wave device and the wiring board, and the surface acoustic wave device can be easily manufactured. it can.
- Materials for the wiring board include ceramics such as alumina, magnesia, and silicon carbide; glass-coated ceramics; ceramic multilayer boards such as alumina with internal conductors and functional parts; and resins such as FR-4 and glass epoxy.
- a substrate can be used.
- the wiring board may be provided with a marker for defining a division range in preparation for division. According to the method of manufacturing an electronic component of the present invention, a surface acoustic wave device is face-down bonded (a technique of directly turning a chip upside down and mounting directly to a package without a die bonding and a wire bonding process. (See page 1189, issued March 5, 1960).
- the face down bonding specifically includes a so-called flip chip method, a beam lead method, a TAB method and a destelling method.
- a thermosetting flaky resin is used as a member at the time of sealing, and the surface or the whole of the resin is melted and cured by heating, so that the surface acoustic wave element and the wiring board are separated from each other.
- the sealing can be performed while maintaining a gap between the main surface of the opposed surface acoustic wave element and the wiring board.
- a wiring pattern is formed on only one main surface or on both the main surface and the other main surface, depending on the mounting method, on each of the wiring boards that constitute a part of the electronic component of the present invention. can do. Also, in a surface acoustic wave device, it is necessary to form a transducer section composed of a comb-shaped electrode pattern and a wiring pattern electrically connected to the transducer section on one surface in order to secure a gap. .
- the surface acoustic wave element and the wiring board can be joined via a joining member, and at this time, the gap of the void formed by the present invention is determined by the shape of the joining member, but it is 10 to 200. It is desirable to secure ⁇ ⁇ , preferably 20 to 80 ⁇ ⁇ .
- the joining member is defined as a means for electrically connecting the surface acoustic wave element and the wiring board and for fixing the both.
- bumps and conductive resin are used.
- the bumps include ball bumps and plated bumps
- the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member for electrically connecting a wiring pattern on a wiring board to a wiring pattern on a surface acoustic wave element for example, a conductive bump may be made of a resin pole or a gold-plated conductive metal.
- Au gold-plated conductive metal.
- P solder
- These conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element by bonding the wiring board and the surface acoustic wave element at a predetermined temperature and pressure. At the same time, a gap is formed between the surface acoustic wave element and the wiring board to play a role of securing the gap.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the surface acoustic wave element and the wiring board that are joined are mounted on the wiring board by covering and solidifying the surface acoustic wave element with a heat-melting mold member, and divided to form a surface acoustic wave device.
- an epoxy-based resin molded into a flake shape as a thermosetting resin is used to melt and cure the surface or the entire surface of the resin by heating, so that the wiring is connected to the surface acoustic wave element.
- the viscosity of the resin can be kept high, and the resin can be prevented from flowing into the void formed on the side of the surface acoustic wave element facing the wiring substrate during curing.
- a frame-shaped insulating partition or dam is not necessarily required. However, by providing the frame-shaped insulating partition, the sealing effect can be further enhanced, and is included in the present invention.
- Liquid thermosetting resins used as conventional sealing resin materials such as epoxy-based potting resins, have low viscosities of about 15 Pas, and even when heated to 100 to 200 Since the viscosity does not increase and remains low, without the frame-shaped insulating member, there is a drawback that the gap flows into the gaps between the functional element and the wiring board and cannot be maintained, thereby impairing the function of the functional element.
- a high-viscosity state is maintained until melting is started by heating, and even after melting.
- a viscosity of 50 Pa ⁇ s or more is obtained. Therefore, the surface acoustic wave element can be easily covered.
- Such a flaky resin must be, for example, a powdery one made from an epoxy resin. It can be easily formed by cold compression molding to the required shape and weight.
- the flaky resin is mounted on another main surface other than the main surface forming the void portion of the surface acoustic wave element, that is, on the other main surface side instead of the main surface on which the wiring pattern of the surface acoustic wave element is formed. You.
- the shape of the flaky resin that is substantially equal to or slightly smaller than the shape of the divided wiring board. More preferably, the shape of the flaky resin is substantially equal to the shape of the wiring board before the division.
- this dimension can be appropriately selected depending on the total volume of the surface acoustic wave element and the thickness of the flaky resin.
- the flaky resin placed on the surface of the surface acoustic wave element on the side opposite to the surface facing the void portion is brought into close contact with at least the other main surface of the element by heating and melting and hardening thereof. And the surface acoustic wave element is sealed with the wiring board.
- the heating and melting temperature of the flaky resin is 100 to 200, and the curing time is 20 hours. Carried out in ⁇ 2 hours. More preferably, after heating and melting at 110 to 170, the curing is carried out at 100 to 160 ° C. for 3 to 20 hours.
- a buffer material sheet having a shape smaller than the shape of the heat-meltable member is adhered to one main surface of the heat-meltable member.
- the surface of the material sheet is placed facing the other main surface of the surface acoustic wave element having the main surface on which the wiring pattern is formed, and at least the other elements are not heated or melted and cured.
- the main surface and the cushioning material sheet are in close contact with each other to cover the surface acoustic wave element, and the surface acoustic wave element can be sealed with the wiring board.
- the cushioning material sheet include a material having high elasticity such as a rubber elastic sheet.
- two layers of metal foil / paraffin paper may be arranged. In this case, the size of the sheet of each layer is not necessarily required to be the same as long as it is a shape smaller than the flaky resin shape, and may be any shape.
- the resin which is caused by contraction and thermal expansion difference during resin curing The stress distortion of the fat can be reduced. Further, since the cushioning sheet can be easily positioned between the sealing resin portion and the surface acoustic wave element, productivity and reliability are improved.
- the height of a wiring pattern connected to a conductive bonding member that is an electrical connection portion between a wiring board and a surface acoustic wave element is determined by changing the wiring board material thickness or wiring pattern. Between the surface acoustic wave element and the wiring board by partially changing the thickness of the conductive material of the surface acoustic wave device, or by controlling the height itself of the conductive joining member to be the electrical connection portion. Since the proper amount of voids can be effectively secured, even in the case of a surface acoustic wave element in which a surface acoustic wave absorbing material is arranged, the bonding strength between the surface acoustic wave element and the wiring board can be sufficiently maintained. However, the reliability of the connection can be improved.
- the method for manufacturing an electronic component and a surface acoustic wave device when forming a wiring pattern of a wiring board, at least a part of the wiring pattern is applied a plurality of times by a screen printing method using a conductive paste. It can be baked or co-fired.
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 ⁇ .
- the wiring pattern when forming a wiring pattern on a wiring board, at least a part of the wiring pattern is formed from another part of the wiring pattern by a film forming method such as evaporation or sputtering. Thick films can also be formed.
- This difference is preferably at least 0.5 ⁇ ⁇ 3 ⁇ 4.
- a green sheet corresponding to a portion opposed to a bonding member serving as an electrical connection portion and a region in the vicinity thereof is added and fired. After that, a wiring pattern can be formed on the wiring board.
- the difference between the thickness of the portion where the green sheet is added and fired and the thickness of the other portion is substantially in the range of 5 to 500 ⁇ .
- the thickness of the joining member is reduced. At least, it can be added to the thickness of the wiring board material or conductive material in the wiring pattern, so that an appropriate amount of gap between the surface acoustic wave element and the wiring board can be effectively secured. Even in the case of a surface acoustic wave element in which a surface acoustic wave absorbing material is arranged, it is possible to sufficiently maintain the bonding strength between the surface acoustic wave element and the wiring board, thereby increasing the bonding strength and improving connection reliability. Can increase the quality.
- a plurality of conductive bumps stacked at substantially the same position may be used as a conductive bonding member serving as an electrical connection portion. it can.
- the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 ⁇ ⁇ .
- the thickness of the conductive ball bump can be adjusted by changing the thickness of the conductive thin wire by using a conductive pole bump as a conductive bonding member serving as an electrical connection portion.
- a ball bump substantially made of gold, a pole bump made substantially of tin, a pole bump made substantially of lead, and the like are more preferable.
- the functional material that is, the surface acoustic wave absorbing material is thinner than the thickness of the conductive joint material. Can be applied.
- a predetermined distance is maintained between the functional element and the wiring board via the conductive bonding member. It is characterized by being assembled.
- the functional element is positioned at a predetermined position with respect to the wiring board. At this time, the conductive bonding member is formed on the wiring pattern formed on at least one main surface of the wiring board.
- the functional element and the wiring board are assembled while maintaining a predetermined interval via the joining member.
- a heat melting type member is disposed on the wiring substrate, and the heat melting type member is heated and melted while leaving a gap between the wiring substrate and the functional element.
- the ripening history of the interface between the functional element and the conductive bonding member during the process can be further reduced, so that the bonding strength can be improved and the reliability can be further improved.
- the frame-shaped insulating member which prevents the heat melting type
- the flaky resin molded as a heat-melting mold member for sealing is joined by heat melting and curing, thereby easily preventing the resin from flowing into the surface of the functional element facing the void. This makes it possible to easily produce a resin-sealed electronic component by forming a gap between the functional element and the wiring board without causing any adverse effect on the functional element.
- Materials for the wiring board include ceramics such as alumina, magnesia, and silicon carbide, glass-coated ceramics, and conductors and functional parts inside.
- a ceramic multilayer substrate such as stored alumina, or a resin substrate such as glass epoxy such as FR-4 can be used. Further, the wiring board may be provided with a marker for defining a division range in preparation for division.
- Examples of the functional element include a surface acoustic wave element, a quartz oscillator, a piezoelectric oscillator, a photo power blur having a pair of a light transmitting unit and a light receiving unit, EPROM, CCD, a semiconductor laser, or a light emitting diode.
- a functional element is directly face-down bonded (inverting a chip directly without die bonding and wire bonding steps). It can be mounted by the technology of attaching it to a package, see “Science Dictionary”, Maruzen Co., Ltd., published on March 5, 1985, page 1189.
- the face-down bonding specifically includes a flip-chip method, a beam lead method, a TAB method, a pedestal method, and the like.
- a thermosetting flaky resin is used as a member at the time of sealing, and the surface or the whole of the resin is polished and cured by heating, whereby the surface acoustic wave element and the wiring board are connected to each other.
- the sealing can be performed while maintaining a gap between the main surface of the surface acoustic wave element facing the semiconductor device and the wiring board.
- a wiring pattern is formed on only one main surface or on both the main surface and the other main surface, depending on the mounting method, on each of the wiring boards that constitute a part of the electronic component of the present invention. can do.
- the functional element and the wiring board are joined via a joining member formed on the wiring board.
- a joining member formed on the wiring board.
- the gap of the void formed by the present invention is determined by the shape of the joining member, it is 10 to It is desirable to secure 200 ⁇ , preferably 20 to 80 / zm.
- the joining member is defined as a means for electrically connecting an element (functional element) and a wiring board, and for fixing both.
- bumps and conductive resin are used.
- the bumps include a pole bump and a plating bump
- the conductive resin includes a conductive paste and an anisotropic conductive resin.
- a member for electrically connecting a wiring pattern on a wiring board to a wiring pattern on an element (functional element), such as a conductive bump, includes a resin pole, gold (Ai), silver (g), There are metal bumps made of solder (Sn, Pb, In, etc.).
- conductive bumps electrically connect the wiring pattern on the wiring board to the wiring pattern on the element (functional element) by bonding the wiring board and the element (functional element) at a predetermined temperature and pressure. And an empty space between the element (functional element) and the wiring board. It will play a role in forming and securing the gap.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the bonded functional element and the wiring board are mounted on the wiring board by covering with a heat-melting type member, for example, a thermosetting resin, and then divided, and the surface acoustic wave is divided.
- an epoxy-based resin molded into a flake shape as a mature curable resin is used, and the surface or the entire surface of the resin is melted by heating, and then the functional element is cured.
- the viscosity of the resin can be kept high, and the resin can be prevented from flowing into the void formed on the side of the functional element facing the wiring board during curing.
- a frame-shaped insulating partition or dam is not necessarily required. However, by providing the frame-shaped insulating partition, the sealing effect can be further enhanced, and is included in the present invention.
- Liquid ripening curable resins used as conventional sealing resin materials such as epoxy-based potting resins, have low viscosities of about 15 Pas, and even when ripened to 100-200 Since the viscosity does not increase and remains low, without the frame-shaped insulating member, there is a drawback that the void flows into the voids of the functional element and the wiring board and cannot be maintained, thereby impairing the function of the functional element.
- a high-viscosity state is maintained until melting is started by ripening by using a flaky epoxy resin, and even after melting.
- a viscosity of 50 Pa ⁇ s or more is obtained. Therefore, the surface acoustic wave element can be easily covered.
- a flaky resin can be easily formed by, for example, cold-pressing a powder made from an epoxy resin into a required shape and weight. The flaky resin is placed on another main surface side other than the main surface forming the void portion of the functional element.
- a shape of the flaky resin that is substantially equal to or slightly smaller than the shape of the divided wiring board. More preferred flaky resin shape is This is almost the same as the wiring board shape.
- this dimension can be appropriately selected depending on the total volume of the functional element and the thickness of the flaky resin.
- the heat melting type member such as a flaky resin, placed on the surface of the functional element opposite to the surface facing the gap portion is in close contact with at least the other main surface of the element by heat melting and curing.
- the element is covered, and the functional element is sealed with the wiring board.
- the heat melting temperature of the flaky resin is 100 to 200 mm, and the curing time is 20 hours. Carried out in ⁇ 2 hours. More preferably, after heating and melting at 110 to 170 ⁇ , curing is performed at about 100 to 160 ⁇ for 3 to 20 hours.
- a buffer sheet having a shape smaller than the shape of the heat-fusible member is adhered to the main surface of the heat-fusible member, and the cushioning material sheet surface of the heat-fusible member is wired.
- the functional element having the main surface on which the pattern is formed is placed facing the other main surface of the functional element, and at least the other main surface of each element and the cushioning material sheet are brought into close contact with each other by heat melting and curing.
- the functional element can be sealed with the wiring board.
- the cushioning material sheet include a material having high elasticity such as a rubber elastic sheet.
- a metal foil / paraffin paper having two layers may be arranged.
- the size of the sheet of each layer is not necessarily required to be the same size as long as the shape is smaller than the flaky resin shape, and may be any shape. With such a configuration, stress distortion of the resin caused by shrinkage and thermal expansion difference when the resin is cured can be reduced. Further, since the cushioning material sheet can be easily positioned between the sealing resin portion and the functional element, productivity and reliability are improved.
- the height of a wiring pattern connected to a conductive bonding member serving as an electrical connection portion between a wiring board and a functional element is set to a thickness of a wiring board material or a wiring pattern. It is controlled by partially changing the thickness of the conductive material.
- the height itself of the conductive bonding member, which is the electrical connection part an appropriate amount of gap between the functional element and the wiring board can be effectively secured, so that it can be used as a surface acoustic wave absorbing material. Even in the case of a functional element on which a functional material is arranged, the bonding strength between the functional element and the wiring board can be sufficiently maintained, and the connection reliability can be improved.
- the difference between the thickness of the portion applied a plurality of times after firing and that of the other portion is in the range of 5 to 100 / ⁇ .
- a film forming method such as evaporation or sputtering. Thick films can also be formed.
- This difference is preferably at least 0.5 / imi.
- a green sheet corresponding to a portion opposed to a bonding member serving as an electrical connection portion and a region in the vicinity thereof is added and fired. After that, a wiring pattern can be formed on the wiring board.
- the difference between the thickness of the portion fired by adding the green sheet and the thickness of the other portion is substantially in the range of 5 to 500 ⁇ 500 ⁇ .
- the thickness of the joining member can be added to the thickness of the wiring board material or the conductive material in the wiring pattern portion.
- the joint strength can be increased and the connection reliability can be increased.
- the sum of the thicknesses of the conductive bumps is preferably in the range of 30 to 150 / zm.
- a conductive contact serving as an electrical connection portion A conductive ball bump can be used as a composite member, and the thickness of the conductive ball bump can be adjusted by changing the thickness of the conductive thin wire.
- the conductive bumps are more preferably pole bumps substantially made of gold, ball bumps substantially made of tin, and pole bumps substantially made of lead.
- the functional material can be applied to at least one main surface or a part of another main surface of the functional element so as to be thinner than the thickness of the conductive bonding member.
- An electronic component of the present invention described below has a wiring board having a first surface and a second surface, a first surface and a second surface, and the first surface is a third surface of the wiring substrate.
- the first surface of the wiring board and the first surface of the functional element are arranged to face each other, and the electronic component is provided above the first surface of the wiring substrate and / or the second surface of the functional element.
- a heat melting type member may be disposed, the heat melting type member may be heated and melted, and the gap may be sealed while at least a gap is left between the wiring board and the functional element. Good.
- the first surface of the wiring board and the first surface of the functional element are arranged to face each other, and a liquid thermosetting liquid is provided from above the first surface and the Z of the wiring substrate or the second surface of the functional element.
- the functional member is poured into a predetermined position, and the poured thermosetting member is heated and cured, and the gap is sealed while at least a gap is left between the wiring board and the functional element. You may.
- the first surface of the wiring board and the first surface of the functional element are arranged to face each other, and a liquid thermosetting liquid is formed from above the first surface and the Z of the wiring substrate or the second surface of the functional element.
- Heat-curing while dropping the conductive member at a predetermined position, and at least The manufacturing may be performed by sealing the gap while leaving the gap between the functional element.
- any heating means may be used for the ripening means, such as melting the heat melting type member or curing the thermosetting member, for example, indirectly using high frequency, electromagnetic wave, ultrasonic wave, light irradiation, or the like.
- a thermal heating method may be used.
- a surface acoustic wave device for example, a surface acoustic wave device, a frame-like insulating member for preventing the sealing resin from flowing into the gap formed between the surface acoustic wave element and the wiring board is necessarily required.
- This has the advantage that a simple structure can be obtained.
- a molded flaky resin as a sealing resin and bonding by heating and melting, it is possible to easily prevent the resin from flowing into the transducer surface of the surface acoustic wave element in particular.
- the sealing resin is applied to the gap formed between the surface acoustic wave element, which is a functional element, and the wiring board.
- the resin wrapping around the side surface of the surface acoustic wave element also acts as a surface acoustic wave absorbing material (sound absorbing material) that absorbs unnecessary surface acoustic waves, thus attenuating unnecessary spurs and creating a surface acoustic wave device. Performance can be improved.
- the elastic surface acoustic wave element can be sealed with the wiring board by curing the liquid resin.
- the electronic component of the present invention has a first surface and a second surface, and has at least a wiring substrate having a wiring pattern formed on the first surface, and a first surface and a second surface.
- a functional element having a first surface facing the first surface of the wiring substrate, a conductive film formed on a second surface of the functional element, the conductive film and the wiring substrate A conductive material that conducts between the wiring pattern and a sealing member that seals the gap while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element.
- one aspect of the electronic component of the present invention for example, a surface acoustic wave device, is that a conductive film is formed over substantially the entire other main surface of the surface acoustic wave device, which is a functional device having one main surface on which a wiring pattern is formed. Is formed, and the conductive film and at least a part of the wiring pattern of the wiring substrate are connected by a conductive material. For this reason, even if external noise is induced, it can be received by the conductive film and grounded through the wiring pattern of the wiring board. It has a so-called electromagnetic shielding effect (shield effect).
- This conductive substance may be a conductive resin containing a conductor such as so-called silver. Further, an anisotropic conductive resin in which a conductor is embedded may be used. Alternatively, the connection may be made using a thin bonding wire such as aluminum, gold, copper, or a solder wire.
- Such a structure includes, for example, a step of arranging a first surface of a wiring board and a first surface of a functional element in opposition, and a step of forming a conductive film on a second surface of the functional element. Conducting a conductive material between the conductive film and the wiring pattern on the first surface of the wiring board with a conductive substance; and sealing the gap with at least a gap between the wiring board and the functional element. Alternatively, it may be manufactured by sealing.
- the electronic component of the present invention has a first surface and a second surface, and has at least a wiring substrate having a wiring pattern formed on the first surface, and a first surface and a second surface, A functional element having a first surface facing the first surface of the wiring substrate, a metallic foil formed on a second surface of the functional device, the metallic foil and the wiring substrate A sealing means for sealing the gap while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element; And characterized in that:
- a metal foil can be used instead of the conductive film and the conductive material. That is, in another aspect of the electronic component of the present invention, for example, a surface acoustic wave device, at least a gap between the other main surface of the surface acoustic wave element having one main surface on which the wiring pattern is formed and the resin portion is provided. A metal foil is provided on a part of the metal foil, and an end of the metal foil is connected to at least a part of a wiring pattern of the wiring board. For this reason, Even if external noise is induced, it can be received by the metal foil and grounded through the wiring pattern of the wiring board.
- Such a structure includes, for example, a step of arranging the first surface of the wiring board and the first surface of the functional element in opposition, and a step of arranging a metallic foil on the second surface of the functional element.
- it may be manufactured by sealing.
- Such a structure is, for example, that a metal foil having a shape smaller than the flaky resin shape is adhered to one main surface of a flaky resin which is a heat melting type member, and the metal foil surface of the resin is bonded to the wiring pattern.
- the surface acoustic wave element having the main surface with the surface formed thereon is placed opposite to the other main surface, and at least the other main surface of the element and the metal foil adhere to each other by heat melting and curing. And enclosing the element, and contacting and connecting the end of the metallic foil to at least a part of the wiring pattern of the wiring board, and sealing the element with the wiring board. it can.
- such a structure is such that a surface acoustic wave element and a wiring board are assembled while maintaining a predetermined interval via an electrical connection portion, and a metal foil is arranged on another main surface of the surface acoustic wave element.
- a liquid component is dropped on the element and adheres to the side of the element.
- the device can be manufactured by tightly covering the element, making an end of the metallic foil contact and connect to at least a part of the wiring pattern of the wiring board, and sealing the element with the wiring board. it can.
- the metallic foil inexpensive ones such as aluminum foil, copper foil, nickel foil, zinc foil and tin foil can be used.
- the metal foil and the element are in close contact with each other, but need not necessarily be integrated. Rather, the small gaps have the advantage of significantly minimizing long-term frequency fluctuations of the device.
- the electronic component of the present invention has a first surface and a second surface, and has a wiring board having a wiring pattern formed on at least the first surface, and a first surface and a second surface, No.
- a functional element having a first surface facing the first surface of the wiring substrate; a conductive film formed on a second surface of the functional device; and a conductive film formed of the conductive film and the wiring substrate.
- a conductive film is provided over substantially the entire other surface of the surface acoustic wave element having one main surface on which a wiring pattern is formed. Is formed, and the conductive film and at least a part of the wiring pattern of the wiring board are connected by a resin in which a magnetic material is dispersed. Ferrite or the like is suitable as the magnetic material.
- the magnetic material acts as an electrically conductive state mainly in a high frequency region of 1 GHz or more, so even if external noise is induced, the conductive film receives the noise and disperses the magnetic material. And through a wiring pattern on the wiring board.
- Such a structure includes, for example, a step of arranging a first surface of a wiring board and a first surface of a functional element in opposition, and a step of forming a conductive film on a second surface of the functional element. Electrically connecting the conductive film and the wiring pattern on the first surface of the wiring board with a resin in which a magnetic substance is dispersed; and forming a gap between the wiring board and the functional element while leaving a gap between at least the wiring board and the functional element. It may be manufactured by sealing the part with a sealing member.
- the electronic component of the present invention has a wiring board having a first surface and a second surface, and has a first surface and a second surface, wherein the first surface is the same as the first surface of the wiring substrate. It is made of a resin in which a functional element and a metal powder are dispersed to face each other, and the gap is formed while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element.
- a sealing member for sealing is
- a sealing member such as a heat melting type member or a thermosetting member is made of a resin in which metal powder is dispersed.
- the resin in which the metal powder is dispersed has a low resistivity and is close to an electrically conductive state. Therefore, even if external noise enters, the wiring pattern on the wiring board is reduced from the resin. And can be grounded You.
- Such a structure includes, for example, a step of arranging the first surface of the wiring substrate and the first surface of the functional element in opposite directions, while leaving a gap between at least the wiring substrate and the functional element.
- the gap may be sealed with a sealing member made of a resin in which a metal powder is dispersed, and then manufactured.
- the electronic component of the present invention has a wiring board having a first surface and a second surface, and has a first surface and a second surface, wherein the first surface is the same as the first surface of the wiring substrate.
- a functional element disposed oppositely; a resin in which magnetic substance powder is dispersed; and a gap between the first surface of the wiring substrate and the first surface of the functional element while leaving a gap between the functional element and the first surface of the functional element.
- a sealing member for sealing the portion.
- a sealing member such as a heat melting type member or a thermosetting member is made of a resin in which magnetic powder is dispersed.
- the magnetic material include ferrite.
- the magnetic substance acts as an electrically conductive state mainly in a high frequency region of 1 GHz or more, so even if external noise is induced, the magnetic substance is further dispersed through the resin in which the magnetic substance powder is dispersed. It can be grounded through a wiring pattern on the wiring board.
- Such a structure includes, for example, a step of arranging the first surface of the wiring substrate and the first surface of the functional element in opposite directions, while leaving a gap between at least the wiring substrate and the functional element.
- the cavity may be manufactured by sealing with a sealing member made of a resin in which magnetic powder is dispersed.
- An electronic component includes a wiring board having a first surface and a second surface, a first surface and a second surface, wherein the first surface faces the first surface of the wiring substrate. And a resin element in which a radio wave absorber material is dispersed, and the gap portion is left while leaving a gap between the first surface of the wiring board and the first surface of the functional element. And a sealing member for sealing the sealing member.
- a sealing member such as a heat melting type member or a thermosetting member is made of a resin in which a radio wave absorber material is dispersed.
- a radio wave absorber material As a material for radio wave absorber, carbon, ferrite or Is a mixture of these.
- the energy of the external electric noise is absorbed by the radio wave absorber, so that the influence of the noise on the surface acoustic wave element, which is a functional element, can be reduced.
- Such a structure includes, for example, a step of vertically disposing the first surface of the wiring board and the first surface of the functional element, while leaving a gap between at least the wiring board and the functional element.
- the cavity may be manufactured by sealing with a sealing member made of a resin in which a radio wave absorber material is dispersed.
- the electronic component of the present invention has a wiring board having a first surface and a second surface, and has a first surface and a second surface, wherein the first surface is the same as the first surface of the wiring substrate.
- a functional element disposed to face, and a resin containing a conductive filler, wherein the void is left while leaving a void between the first surface of the wiring board and the first surface of the functional element.
- a sealing member for sealing.
- a sealing member such as a heat melting type member or a thermosetting member is made of a resin containing a conductive filler.
- a conductive filler is carbon.
- the resin containing the conductive filler has a low resistivity and is close to an electrically conductive state, so that even if external noise enters, the wiring pattern on the wiring board from the resin is reduced. And can be grounded.
- Such a structure includes, for example, a step of arranging the first surface of the wiring substrate and the first surface of the functional element in opposite directions, while leaving a gap between at least the wiring substrate and the functional element.
- the cavity may be manufactured by sealing with a sealing member made of a resin containing a conductive filler.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having concave portions formed at two end surfaces, and a first surface and a second surface.
- a functional element having a first surface opposed to the first surface of the wiring substrate; and a gap between the first surface of the wiring substrate and the first surface of the functional element. Seal the gap while leaving Sealing member, and a pair of protrusions engaging with the respective recesses provided on the wiring board are provided on the two legs so as to face each other, and the first surface of the wiring board and the functional element And a metal plate.
- the electronic component of the present invention has a first surface and a second surface, a concave portion is formed on each of two end surfaces, and a wiring board having a wiring pattern formed on the inner surface of the concave portion.
- a functional element having a first surface and a second surface, wherein the first surface is disposed so as to face the first surface of the wiring substrate; and the first surface of the wiring substrate and the function
- a sealing member that seals the gap while leaving a gap between the first surface of the element and an electrical connection with each wiring pattern on the inner surface of the recess while engaging with each recess provided in the wiring board;
- a pair of conductive protrusions are provided on the two legs so as to oppose each other, and a metal plate that covers the first surface of the wiring board and the functional element is provided.
- a metal plate in which a concave portion is formed on at least two side end surfaces of a wiring board and a convex portion is formed on an end portion is provided. It is installed so as to cover at least a part of the resin part, and the concave part formed on the side end surface of the wiring board and the convex part formed on the end part of the metal plate are integrated by holding each other. It is characterized by becoming.
- the metal plate covers a sealing member such as a heat-meltable member, a thermosetting member, and a wiring board.
- marking is performed on a flat portion of the metal plate by a method such as a stamp. It can be easily formed.
- a surface acoustic wave device at least one of the wiring patterns in which a concave wiring pattern is formed on at least two side end surfaces of the wiring substrate on the one main surface.
- a metal plate that is formed so as to be electrically connected to a part and that has a convex part at the end covers at least a part of a sealing member such as a heat-melting member or a thermosetting member.
- the concave wiring pattern formed on the side end surface of the wiring board and the convex portion formed on the end of the metal plate are held in contact with each other and integrated. I have.
- Such a structure includes, for example, a step of arranging the first surface of the wiring substrate and the first surface of the functional element in opposite directions, while leaving a gap between at least the wiring substrate and the functional element.
- the gap is sealed with a sealing member, and a pair of protrusions provided to face the two legs of the metal plate are provided in the respective recesses provided at the two end surfaces of the wiring board.
- the functional elements may be respectively covered by the metal plate to cover the first surface of the wiring board and the functional element.
- a pair of projections provided to face the two legs of the metal plate are respectively engaged with the respective recesses provided on the two end surfaces of the wiring board.
- the wiring pattern provided on the inner surface may be electrically connected to the wiring pattern provided on the tip of the protrusion, and the first surface of the wiring board and the functional element may be covered with the metal plate. Good.
- an electronic component includes a wiring board having a first surface and a second surface, and a stepped portion having two end surfaces each having a first surface side as an upper stage, A functional element having a first surface and a second surface, wherein the first surface is disposed so as to face the first surface of the wiring substrate; and a first surface of the wiring substrate and a first surface of the functional element.
- a sealing member that seals the gap while leaving a gap between the two surfaces, and a pair of protrusions that engage with each stepped portion provided on the wiring board are provided on two legs.
- a metal plate is provided so as to be opposed to the first surface of the wiring board and covers the functional element.
- the electronic component of the present invention has a stepped portion having a first surface and a second surface, the first surface being an upper stage on each of two end surfaces, and a wiring pattern being provided on a lower stage.
- a functional substrate having a first surface and a second surface, wherein the first surface is arranged to face the first surface of the wiring substrate; and When engaging with a sealing member for sealing the gap while leaving a gap between the first surface and the first surface of the functional element, and with each stepped portion provided on the wiring board.
- Both of the wiring A pair of protrusions electrically connected to the turn are provided on the two legs so as to face each other, and a metal plate covering the first surface of the wiring board and the functional element is provided.
- a surface acoustic wave device for example, a surface acoustic wave device, a metal plate in which a cutout portion is formed in at least two side end surfaces of a wiring board and a protruding portion is formed in the end portion Is provided so as to cover at least a part of a sealing member such as a heat melting type member or a thermosetting member, and is formed at a notch formed at a side end surface of the wiring board and at an end of the metal plate. It is characterized in that the projected portions are integrated by holding each other.
- Such a structure includes, for example, a step of arranging the first surface of the wiring substrate and the first surface of the functional element in opposite directions, while leaving a gap between at least the wiring substrate and the functional element.
- the gap is sealed with a sealing member, and each stepped portion provided at two end surfaces of the wiring board such that the first surface side is an upper stage is opposed to two legs of a metal plate.
- a pair of protrusions provided as described above may be engaged with each other, and the first surface of the wiring board and the functional element may be covered with the metal plate.
- a wiring pattern provided on a lower surface of the end surface and a wiring pattern provided on a tip of the protrusion are electrically connected to each other, and The first surface and the functional element may be covered.
- the metal plate can be accurately fixed to the wiring board, and marking can be easily formed on a flat portion of the metal plate by a method such as a stamp.
- a notch is formed on at least two side end surfaces of the wiring board, and the cutout is formed on the one main surface.
- the metal plate having at least a part of the formed wiring pattern and a wiring pattern formed in at least a part of the notch portion is electrically connected, and a metal plate having a protruding portion formed at an end is formed by the heat melting type member.
- a notch formed on a side end surface of the wiring board and a protrusion formed on an end of the metal plate are installed so as to cover at least a part of a sealing member made of a thermosetting member or the like.
- the metal plate can form a flat portion on the outer surface of the surface acoustic wave device, it has an effect of being easily formed when printing a mark, in addition to an electromagnetic shielding effect.
- a concave portion or a notch portion is formed at at least two places on the side end surface of the wiring board, a convex portion or a protruding portion is formed at the end portion of the metal plate, and the heating is performed by covering the functional element.
- the metal plate is installed so as to cover at least a part of a sealing member made of a fusion mold member, a thermosetting member, or the like, and a concave portion or a notch portion formed on a side end surface of the wiring board is provided.
- the metal plate can be manufactured by integrating the protrusions or protrusions formed at the ends of the metal plate so as to hold each other. Further, it can be easily manufactured by using a metal plate having at least a part that is flat and formed substantially parallel to the wiring board.
- a cushioning member is arranged between a sealing member made of a heat melting type member, a thermosetting member, and the like, and a surface acoustic wave element as a functional element.
- a resin containing a glass filler as a sealing member made of a heat-melting member, a thermosetting member, etc.
- stress distortion due to curing and thermal expansion of the resin, etc. which is a sealing member, can be alleviated. Can reduce undesirable effects on characteristics.
- a cushioning material for example, an elastic body such as rubber may be used, or a resin containing a glass filler is used as a sealing member such as a heat melting type member or a thermosetting member. You may do so.
- a glass filler for example, at least one of a substantially amorphous crushed product, a crystalline crushed product, and a molten crushed product may be used.
- a surface acoustic wave device by arranging the conductive bonding member at a predetermined position, the reliability can be improved by absorbing a difference in thermal expansion, and the sealing resin is preferably used. No intrusion can be prevented.
- an electronic component of the present invention for example, a surface acoustic wave device, a buffer is provided between a sealing member made of a heat-melting member, a thermosetting member, and the like, and a surface acoustic wave element that is a functional element.
- the material sheet can be easily positioned, leading to improved productivity and reliability.
- An electronic component includes a wiring board having a first surface and a second surface, a first surface and a second surface, wherein the first surface faces the first surface of the wiring substrate.
- a functional element disposed as follows; a cushioning material disposed on a second surface of the functional element; and a void portion between a first surface of the wiring substrate and a first surface of the functional element.
- a sealing member for sealing the gap.
- one aspect of the electronic component of the present invention is the above-described functional element, for example, a surface acoustic wave element, and is sealed with, for example, a cured heat-fusible member, a thermally cured liquid resin, or the like. It is characterized in that a cushioning material is arranged between members. Examples of the cushioning material include a material having high elasticity such as a rubber elastic sheet. Alternatively, two layers of metal foil / paraffin paper may be arranged. Further, these buffer materials may be formed of a conductive material. For example, carbon may be used as the conductive filler together with the sealing member to provide conductivity.
- the important point is to prevent the shrinkage of the resin during curing from affecting the properties and functions of the surface acoustic wave element as much as possible. With this configuration, the stress distortion of the resin is reduced. be able to. The same applies to the case where low-melting glass is used as the sealing member.
- Such a structure includes, for example, a step of arranging the first surface of the wiring board and the first surface of the functional element in opposition, and a step of arranging a cushioning material on the second surface of the functional element.
- the gap may be sealed with a sealing member while the gap is left between the wiring board and the functional element, and the functional element may be manufactured.
- a buffer material sheet having a shape smaller than the shape of the heat melting type member is adhered to the main surface of the heat melting type member, and the buffer material sheet surface of the heat melting type member has a main surface on which the wiring pattern is formed.
- the other main surface of the surface acoustic wave element and the cushioning material sheet are adhered to each other by heating, melting, and hardening to cover the element.
- the device may be manufactured by sealing the element with a wiring board.
- a buffer material sheet is adhered to one main surface of the functional element, and placed opposite to another main surface of the surface acoustic wave element having the main surface on which the wiring pattern is formed, and heat is applied from above.
- a liquid resin which is a curable member, is dropped or poured, and is heat-cured so that at least the other main surface of the element and the cushioning sheet are in close contact with each other to cover the element, and the wiring board is used.
- the device may be manufactured by sealing.
- the cushioning sheet for example, a material having high elasticity such as a rubber elastic sheet may be used.
- a metal foil / paraffin paper having two layers may be arranged.
- the size of the sheet of each layer does not necessarily have to be the same size as long as it is smaller than the flaky resin shape, and may have any shape.
- An electronic component includes a wiring board having a first surface and a second surface, a first surface and a second surface, wherein the first surface faces the first surface of the wiring substrate. And a resin containing a glass filler, and sealing the gap while leaving a gap between the first surface of the wiring board and the first surface of the functional element. And a sealing member to be provided.
- the resin serving as the sealing member made of the heat-fusible member or the thermosetting member is made of a resin containing a glass filler. It is characterized by.
- a glass filler for example, a crushed product of a molten sili force, an amorphous sili force, a crystalline sili force, or Examples include PbO-B203, low melting point glass containing Si02, Al203, PbF2, and the like.
- the shape of these glass fillers is preferably such that the average particle diameter is usually in the range of about 0.1 / ⁇ ⁇ 50 / zm. Further, the shape may be elongated.
- a combination of the particles having an average particle diameter of 0.1 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ and the particles having an average particle diameter of 5 ni ⁇ ⁇ 50 ⁇ ⁇ may be used.
- the thermal expansion coefficient of the resin member which is a heat melting type member
- the thermal expansion coefficient of the sealing member resin made of a liquid resin to be cured can be reduced. Rate can be approached.
- the difference in thermal expansion between the constituent elements can be absorbed, the stress distortion can be reduced, and the reliability such as thermal impact can be improved.
- mechanical strength can be improved.
- Such a structure includes, for example, a step of arranging the first surface of the wiring substrate and the first surface of the functional element in opposite directions, while leaving a gap between at least the wiring substrate and the functional element.
- the gap may be manufactured by sealing with a sealing member made of a resin containing a glass filler.
- an electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface, A wiring pattern is formed on the first surface, the first surface is arranged to face the first surface of the wiring substrate, and the functional element is arranged in a region near the center of the functional element.
- a sealing member that seals the gap while leaving the gap.
- the plurality of conductive bonding members are concentratedly arranged at a position facing an area near a central portion of the surface acoustic wave element as the functional element. It is characterized by being.
- the bonding member has a function of electrically connecting the wiring pattern of the surface acoustic wave element and the wiring pattern of the wiring board. Therefore, poor connection must be avoided.
- An important factor in connection failure is stress distortion due to the difference in the coefficient of thermal expansion of each component.
- the concentration of stress strain can be reduced. This is particularly effective when an elongated surface acoustic wave element is used.
- Such a structure can be achieved, for example, by arranging a joining member for electrically connecting a wiring pattern of a wiring board and a wiring pattern of a functional element in a region near a central portion of the functional element, And the first surface of the functional element are disposed opposite to each other, and the gap is sealed with a sealing member while leaving a gap between at least the wiring substrate and the functional element. You may do so.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface, A wiring pattern is formed on the first surface, and the first surface is arranged so as to face the first surface of the wiring board, and the functional element is concentratedly arranged in a region near the center of the functional element.
- a sealing member for sealing the sealing member.
- the plurality of conductive bonding members are concentratedly arranged at a position opposed to a central portion vicinity region of the surface acoustic wave element as the functional element.
- a plurality of other connecting members which are not included in the electrical connection are arranged at positions facing the peripheral region of the element.
- the connection between the surface acoustic wave element and the wiring board can be made more reliable, and a plurality of bonding members arranged at positions facing the peripheral region of the element, for example, the heating member.
- the first bonding member that electrically connects the wiring pattern of the wiring board and the wiring pattern of the functional element is concentrated in a region near the center of the functional element.
- the second bonding member which is arranged and is not confined to the electrical connection between the wiring pattern of the wiring board and the wiring pattern of the functional element, is arranged in the peripheral area of the functional element, and the first surface of the wiring board and the function are arranged.
- a functional element for example, a surface acoustic wave element, in a functional element mounted on a substrate by a face-down bonding method, a plurality of connection terminals electrically connected to the substrate are provided on one principal surface of the functional element.
- the elements that are arranged centrally at the center may be used.
- this functional element may be an element having a relatively elongated shape, which is effective from the viewpoint of the strength of the electronic component.
- the surface acoustic wave element when the functional element is a surface acoustic wave element, the surface acoustic wave element includes a piezoelectric substrate, a plurality of pairs of comb-shaped electrodes formed on the piezoelectric substrate, and a substantially center of the piezoelectric substrate. And an external connection terminal group provided in a centralized manner.
- This surface acoustic wave element may further include, for example, a sound absorbing agent formed so as to sandwich the comb-shaped electrode on the piezoelectric substrate.
- the external connection terminal group may include an external connection terminal that extends to and is electrically connected to the comb-shaped electrode.
- the surface acoustic wave element By controlling the thickness of the substrate material or the thickness of the conductive material of the wiring pattern partially, or by controlling the height of the conductive bonding member that is the electrical connection part, the surface acoustic wave element, which is a functional element, can be controlled. Since an appropriate amount of gap between the wiring board and the wiring board can be effectively secured, the bonding strength between the surface acoustic wave element and the wiring board can be reduced even in the case of a surface acoustic wave element in which a surface acoustic wave absorbing material is arranged. It is possible to improve the reliability of the connection by keeping it to a sufficient level.
- An electronic component has a first surface and a second surface, and a first wiring pattern made of a conductive material having a first thickness on a first surface and a second wiring pattern thicker than the first thickness.
- a functional element having a surface facing the first surface of the wiring substrate; a conductive bonding member disposed between a second wiring pattern of the wiring substrate and the wiring pad of the functional element; And a sealing member that seals the gap while leaving a gap between the first surface of the wiring substrate and the first surface of the functional element.
- the thickness of the conductive material of at least a part of the wiring pattern formed on the main surface of the wiring board is different from that of the other part of the wiring pattern. It is characterized by being thicker than the thickness. This difference is preferably in the range of 5 to 100 ⁇ . With such a structure, even if the thickness of the conductive bonding member is small, the thickness can be added to the thickness of the conductive material.
- Such a structure of an electronic component is, for example, such that when forming a wiring pattern of a wiring board, at least a part of the wiring pattern is applied a plurality of times by a screen printing method using a conductive paste and is baked or baked simultaneously. It may be. In this case, it is preferable that the difference between the thickness of the portion that has been applied a plurality of times after firing and the other portion is in the range of 5 to 100 ⁇ .
- the wiring pattern of a wiring board when forming a wiring pattern of a wiring board, at least a part of the wiring pattern may be formed to be thicker than other parts of the wiring pattern by a film forming method such as evaporation or sputtering.
- a film forming method such as evaporation or sputtering.
- the difference in the film thickness to be formed is at least 5 / m or more.
- the electronic component of the present invention has a first surface and a second surface, a first region made of a substrate material having a first thickness, and a substrate having a second thickness greater than the first thickness.
- the thickness of the wiring board material in at least a part of the wiring pattern formed on the main surface of the wiring board is different from that of the other parts of the wiring pattern. It is characterized by being thicker than the thickness of the wiring board material in the region. This difference is preferably in the range of 5 to 100 ⁇ .
- the bonding strength between the surface acoustic wave element and the wiring board can be sufficiently increased, especially in the case of a surface acoustic wave element in which a surface acoustic wave absorber is disposed. Can be kept.
- Such a structure is, for example, when a wiring board is formed, a green sheet corresponding to a portion opposed to a joining member serving as an electrical connection portion and a region in the vicinity thereof is added and fired, and then the wiring board is formed.
- a wiring pattern may be formed.
- the difference between the thickness of the portion to which the green sheet is added and fired and the thickness of the other portion is substantially in the range of 5 to 500 ⁇ .
- the thickness of the joining member can be added to the thickness of the wiring board material or conductive material in the wiring pattern portion.
- the bonding strength between the elastic surface acoustic wave element and the wiring board can be effectively secured. Can be maintained sufficiently, the joint strength can be increased, and the connection reliability can be increased.
- the electronic component of the present invention has a first surface and a second surface, and the first surface has a wiring pattern.
- a functional element disposed between the wiring pattern on the first surface of the wiring board and the wiring pattern on the first surface of the functional element, and the bumps are stacked in accordance with an interval between the wiring patterns.
- a plurality of conductive bumps are provided at substantially the same position as a conductive joining member serving as an electrical connection portion. It is characterized by using stacked ones. In this case, the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 / zm.
- a conductive pole bump may be used as a conductive bonding member serving as an electrical connection portion, and the thickness of the conductive ball bump may be adjusted by changing the thickness of the conductive thin wire. .
- a pole bump substantially made of gold, a ball bump made substantially of tin, a ball bump made substantially of lead, or the like as the conductive bump.
- at least one principal surface or a part of another principal surface of the surface acoustic wave element may be provided with a surface acoustic wave absorbing material thinner than the thickness of the conductive bonding member.
- Providing a conductive joining member that becomes an electrical connection portion with a controlled thickness in this manner can also effectively secure an appropriate amount of gap between the surface acoustic wave element and the wiring board.
- the manufacturing is further simplified.
- a plurality of conductive bumps stacked at substantially the same position may be used as a conductive bonding member serving as an electrical connection portion.
- the sum of the thicknesses of the plurality of conductive bumps is
- a conductive pole bump may be used as a conductive bonding member serving as an electrical connection part, and the thickness of the conductive pole bump may be adjusted by changing the thickness of the conductive thin wire. You may do it.
- the conductive bumps are more preferably substantially gold ball bumps, substantially tin ball bumps, substantially lead ball bumps, and the like.
- the surface acoustic wave absorbing material is applied to at least one principal surface or a part of another principal surface of the surface acoustic wave element, the surface acoustic wave absorbing material is applied thinner than the thickness of the conductive bonding member. You may do so.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface,
- a functional element which is a surface acoustic wave element having a wiring pattern and a sound absorbing agent formed on a first surface, the first surface being opposed to the first surface of the wiring substrate; and a wiring of the wiring substrate.
- a conductive bonding member arranged between the pattern and the wiring pattern of the functional element, the conductive bonding member having a height exceeding a thickness of the sound absorbing agent; a first surface of the wiring substrate and a first surface of the functional element; And a sealing member for sealing the gap while leaving the gap therebetween.
- the electronic component of the present invention has a first surface and a second surface, a wiring board having a wiring pattern formed on the first surface, and a first surface and a second surface, A function as a surface acoustic wave element in which a wiring pattern is formed on a first surface, a sound absorbing agent is formed on a second surface, and the first surface is arranged to face the first surface of the wiring board.
- An element, a conductive bonding member disposed between a wiring pattern of the wiring board and a wiring pattern of the functional element, and between a first surface of the wiring substrate and a first surface of the functional element.
- a sealing member for sealing the gap while leaving the gap.
- the electronic component of the present invention has a first surface and a second surface, a wiring substrate having a wiring pattern formed on the first surface, and a first surface and a second surface, A function as a surface acoustic wave element in which a wiring pattern is formed on a first surface, a sound absorbing agent is formed on a second surface, and the first surface is arranged to face the first surface of the wiring board.
- a conductive bonding member disposed between a wiring pattern of a board and a wiring pattern of the functional element; a metal foil disposed on a second surface of the functional element; and a first surface of the wiring substrate.
- a sealing member for sealing the gap while leaving a gap between the functional element and the first surface.
- another aspect of the surface acoustic wave device is that a surface acoustic wave absorbing material is disposed on at least one principal surface or a part of another principal surface of the surface acoustic wave element, and
- the thickness of the surface acoustic wave absorber is smaller than the thickness of the joining member. This difference is preferably in the range of 5 to 50 ⁇ .
- An element with a surface acoustic wave absorber requires that the thickness of the absorber be an appropriate amount. With such a configuration, an appropriate amount of gap between the surface acoustic wave element and the wiring board can be effectively secured even if the thickness of the joining member is small.
- the electronic component of the present invention includes a wiring board having a first surface and a second surface, a first substrate and a second surface, and the first surface.
- a functional element disposed to face the first surface of the wiring board; and a void portion while leaving a void between the first surface of the wiring substrate and the first surface of the functional element.
- a sealing member for sealing For example, a heat melting type member may be used as the sealing member, or a thermosetting member may be used, for example.
- the heat melting type member refers to a solid state in an initial state such as a pelletized resin powder
- the thermosetting member refers to a liquid thermosetting resin material such as a liquid.
- the initial state is a liquid that has fluidity that allows dripping and pouring.
- a surface acoustic wave device for example, a surface acoustic wave device, a sealing member made of a heat-fusible member for sealing, a thermosetting member, or the like, and a surface acoustic wave element as a functional element are used.
- a conductive film or a metal foil is formed between them and is connected to the wiring pattern on the wiring board in a direct current or high frequency manner, or, for example, a heat melting type member or a sealing made of a liquid resin to be cured by heating.
- a metal plate is installed on the wiring board so as to cover at least a part of the heat melting type member, and the metal plate surface can be flattened by bonding, so that it is resistant to external noise and has good marking properties. It is possible to provide an electronic component that is excellent in terms of, for example, a surface acoustic wave device.
- a surface acoustic wave device for example, a surface acoustic wave device, a frame-shaped insulating member for preventing a sealing resin from flowing into a gap formed between the surface acoustic wave element and the wiring board is necessarily required.
- This has the advantage that a simple structure can be obtained.
- a molded flaky resin is used as a sealing member to be heated and melted and cured, or a resin having a property of being cured by, for example, heating or photopolymerization is poured and cured as a sealing member while being dropped.
- the frame-shaped insulating member is not necessarily required to prevent the sealing resin having a constant viscosity from flowing into the gap formed between the main surface of the surface acoustic wave element on the transducer section side and the wiring board, for example.
- a surface acoustic wave device having a simple structure can be obtained without being required. Since the electronic component of the present invention does not require a frame-shaped insulating member or a surrounding member, the size of the electronic component can be reduced. Therefore, an electronic component suitable for high-density mounting can be provided. Further, according to the method for manufacturing an electronic component of the present invention, a functional element can be mounted on a wiring board without the need for a frame-shaped insulating member or a surrounding member, and an electronic component smaller than before can be manufactured. be able to. Also, electronic components suitable for high-density mounting can be manufactured.
- an electronic component of the present invention for example, a surface acoustic wave device
- resin having a constant viscosity since resin having a constant viscosity is used, the step of forming a frame-shaped insulating member, which is conventionally required, can be omitted.
- a heat-melting member may be used.
- a thermosetting member may be used as the sealing member.
- a frame-shaped member arranged on the first surface of the wiring board and surrounding the void may be further provided. The frame-shaped member may not be used, but by further using the frame-shaped member, a gap between the wiring board and the functional element can be more reliably secured. Therefore, it is possible to more reliably prevent the functional elements such as the surface acoustic wave element, the light receiving element, and the light emitting element from impairing the function due to the sealing member wrapping around the gap.
- the sealing member may be arranged so as to cover the entire second surface of the functional element. Further, the sealing member may be arranged so as to cover a part of the second surface of the functional element. Further, the sealing member may be arranged so as to expose the entire second surface of the functional element.
- the semiconductor device may further include a conductive bonding member disposed between the first surface of the wiring board and the first surface of the functional element.
- a conductive bonding member disposed between the first surface of the wiring board and the first surface of the functional element.
- the functional element is a surface acoustic wave element, and the connection pattern on the first surface of the wiring board and the connection pattern on the first surface of the surface acoustic wave element are joined by a face down bonding method.
- a conductive joining member may be further provided.
- any functional element may be mounted, examples thereof include a surface acoustic wave element, a quartz oscillator, a piezoelectric oscillator, a photocoupler, an EPROM, a CCD, a semiconductor laser, and a light emitting diode.
- the mounted functional element include a surface acoustic wave element, a quartz oscillator, a piezoelectric oscillator, a photocoupler, an EPROM, a CCD, a semiconductor laser, and a light emitting diode.
- EPROMs For EPROMs, CCDs, semiconductor lasers, light-emitting diodes and other light-receiving elements, light-emitting elements, or photoelectric conversion elements, use a material that transmits light at least in the area of the wiring board where the functional elements are mounted. It may be.
- the functional element is a crystal oscillator, and a conductive bonding member for bonding between the connection pattern on the first surface of the wiring substrate and the electrode on the first surface of the crystal oscillator by a face-down bonding method. And a bonding wire for electrically connecting a wiring pattern on a first surface of the wiring substrate to an electrode on a second surface of the crystal unit. May be further provided.
- the functional element is a piezoelectric vibrator, and a conductive bonding for bonding between the connection pattern on the first surface of the wiring substrate and the electrode on the first surface of the piezoelectric vibrator by a face-down bonding method.
- a member and a bonding wire for electrically connecting a wiring pattern on a first surface of the wiring substrate to an electrode on a second surface of the piezoelectric vibrator may be further provided.
- the functional element is a photo power blur having a pair of a light transmitting part and a light receiving part, and the connection pattern on the first surface of the wiring board and the wiring pattern on each first surface of the photo power blur are provided.
- a surrounding member disposed on the first surface of the wiring board and surrounding the photo-power bra, wherein the sealing member is provided. It may be arranged at least on the surrounding member.
- a substrate that transmits light may be used as the wiring substrate, and the first surface of the functional element may use an EPROM of a light receiving surface.
- a substrate that transmits light may be used as the wiring substrate, and a CCD whose first surface is a light receiving surface may be arranged as the functional element.
- a substrate that transmits light may be used as the wiring substrate, and a semiconductor laser whose first surface is a light emitting surface may be disposed as the functional element.
- a light-transmitting substrate may be used as the wiring substrate, and a light emitting diode whose first surface is a light-emitting surface and a CCD whose light-receiving surface is a light-receiving surface may be disposed as the functional element.
- the electronic component of the present invention is an electronic component of the present invention, which has a wiring board having a first surface and a second surface, a first surface and a second surface, and the first surface is A functional element disposed to face the first surface of the wiring board; and a void portion while leaving a void between the first surface of the wiring substrate and the first surface of the functional element.
- a sealing member for sealing for sealing.
- a heat melting type member may be used as the sealing member, or a thermosetting member may be used, for example.
- the heat-melted mold member is in the initial state, for example, in the form of pelletized resin powder.
- the thermosetting member is a liquid thermosetting material such as a liquid thermosetting resin material that has an initial state of fluidity that allows dripping or pouring. I /
- the first surface of the wiring substrate and the first surface of the functional element are arranged to face each other, and the first surface of the wiring substrate and the Z or the functional element
- a heat melting type member is disposed above the second surface of the heat melting type member, and the heat melting type member is heated and melted, and the gap is sealed while leaving at least a gap between the wiring board and the functional element. It may be manufactured by manufacturing.
- thermosetting member when a liquid thermosetting member is used, the first surface of the wiring substrate and the first surface of the functional element are arranged to face each other, and the first surface of the wiring substrate and Z or the functional element A liquid thermosetting member is poured into a predetermined position from above the second surface, and the poured thermosetting member is heat-cured while leaving a gap between at least the wiring board and the functional element.
- the gap may be sealed and manufactured.
- the first surface of the wiring substrate and the first surface of the functional element are arranged to face each other, and the first surface of the wiring substrate and Z or the functional element A liquid thermosetting member is dropped and dropped at a predetermined position from above the second surface, and heat-cured to seal the gap while leaving at least a gap between the wiring substrate and the functional element. It may be manufactured by manufacturing.
- the electronic component of the present invention has a technology of directly attaching a functional element such as a surface acoustic wave element or a semiconductor element to a package by face-down bonding (ie, without flipping a die and a wire bonding step).
- a functional element such as a surface acoustic wave element or a semiconductor element
- face-down bonding ie, without flipping a die and a wire bonding step.
- a heat melting type member obtained by cold-pressing a powder material, for example, a thermosetting flaky resin, and the resin surface or the whole is melted by heating And hardening, the surface acoustic wave element and the wiring board are separated from the transducer part provided on the surface acoustic wave element and the wiring base.
- the sealing may be performed while holding a gap between the plate and the plate.
- a resin having a property of being cured by heating or light polymerization as a sealing member, the surface acoustic wave element and the wiring board are cured by dropping or curing by pouring the resin into a surface acoustic wave element.
- sealing may be performed while maintaining a gap between the transducer section provided in the wiring board and the wiring board.
- Wiring boards that form part of electronic components such as surface acoustic wave devices must have wiring patterns formed on only one main surface or over both main surfaces and other main surfaces, depending on the mounting method. Can be. Alternatively, it is a wiring board with built-in functions of resistors, capacitors and coils, in which a wiring pattern is formed on one main surface or on both the main surface and the other main surface, and the built-in functional part Electrically connected ones can be used.
- the material of the wiring board include ceramics such as alumina, magnesia, and silicon carbide, glass-coated ceramics, ceramic multilayer boards such as alumina having conductors and functional parts incorporated therein, and glass epoxy such as FR-4.
- a fat substrate can be used.
- a substrate such as a multilayer substrate or a flexible substrate (including a film carrier) may be used.
- transducer portion formed of a comb-shaped electrode pattern on one surface and a wiring pattern electrically connected to the transducer portion.
- the joining member is defined as a means for electrically connecting an element (functional element) and a wiring board, and for fixing both.
- bumps and conductive resin are used.
- the bumps include ball bumps and plated bumps
- the conductive resin includes a conductive paste and an anisotropic conductive resin (ACF). In the present invention, these may be used alone or in combination, and these are included in the present invention.
- the close contact means a state where two different members are in contact with each other, and a state where both can be easily separated by an external force. There may be a small gap between them.
- the term “integration” refers to a state in which two different members are in contact with each other and are fixed to such an extent that they cannot be easily separated by external force.
- the heating may be direct heating or indirect heating, as long as the amount of heat necessary to melt or cure the sealing member is applied.
- a heating method such as heating by high frequency, heating by electromagnetic waves, heating by ultrasonic waves, and heating by light irradiation may be used.
- a member for electrically joining a wiring pattern on a wiring board to a wiring pattern on a functional element such as a surface acoustic wave element, for example, a conductive bump may be made of a resin ball or gold (Ai) coated with a conductive metal. ) Or silver (P%, or solder (Sn-based, Pb-based, In-based, etc.)).
- These conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the functional element by bonding the wiring board and the functional element at a predetermined temperature and pressure. Thus, a gap is formed and secured between the functional element and the wiring board.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 x m. Also, when the bumps are formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the surface acoustic wave element as the conductive bonding member, the wiring pattern on the wiring board and the surface acoustic wave It is also possible to join the wiring pattern on the element.
- such an electronic component of the present invention such as a surface acoustic wave device, for example, in a mounting structure in which a surface acoustic wave element is face-down bonded, for example, a flaky resin is used as a resin at the time of sealing, and the resin is heated. The surface or the whole is melted and hardened so that the surface acoustic wave element and the wiring board are sealed while holding a gap between the transducer portion provided in the surface acoustic wave element and the wiring board. You may.
- the wiring board that forms a part of the surface acoustic wave device of the present invention can have a wiring pattern formed on only the main surface or over both the main surface and the other main surface due to the difference in the mounting method. .
- a transducer section composed of a comb-shaped electrode pattern and a wiring pattern electrically connected to the transducer section.
- the conductive ball bumps may be substantially made of gold.
- the conductive pole bump may be substantially made of tin.
- the conductive ball bumps may be substantially composed of lead.
- the conductive ball bump may be substantially composed of tin and lead, or the conductive ball bump may be substantially composed of tin and silver.
- These conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element by bonding the wiring board and the surface acoustic wave element at a predetermined temperature and pressure. At the same time, a gap is formed between the surface acoustic wave element and the wiring board to play a role of securing the gap.
- a conductive ball bump may be used as the conductive bonding member, and the thickness of the conductive ball bump may be adjusted by changing the thickness of the conductive thin wire.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is desirable to secure 10 to 200 ⁇ , preferably 20 to 80 ⁇ . Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the surface acoustic wave element as the conductive bonding member, the wiring pattern on the wiring board and the surface acoustic wave element It can also be joined to the upper wiring pattern. Furthermore, by forming a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- the functional element having the bump is arranged to face the wiring board.
- the infrared rays may be emitted by, for example, a halogen lamp.
- the peripheral part of the sealing member and the peripheral part of the wiring board are sealed by a sealing member that covers the functional element except for a gap formed between the functional element and the wiring board. You may make it seal.
- a sealing member for example, a heat melting type member may be used, or a liquid thermosetting member may be used.
- a surface acoustic wave device for example, a wiring pattern from one main surface of a wiring board is formed between a peripheral edge of a resin portion and a peripheral edge of the wiring board. It may be exposed. Therefore, since the resin portion does not cover the wiring pattern, the resin portion is continuous with the concave wiring pattern formed on the side end surface of the wiring board.
- connection portion on the circuit board and the concave wiring pattern formed on the side end surface of the wiring board are easily soldered. Can be connected.
- an epoxy resin may be used as the resin portion.
- annular insulating partition wall is formed along the inside of each joining member and / or outside each joining member of the trajectory formed by the plurality of joining members. It is characterized by.
- annular insulating partitions play a role in securely holding a gap formed between the surface acoustic wave element and the wiring board.
- a method for manufacturing a surface acoustic wave device as an electronic component of the present invention for example, a bonded surface acoustic wave element and a wiring board are mounted on a wiring board by covering and hardening with a flaky thermosetting resin.
- a surface acoustic wave device may be constructed. At this time, the surface or the whole of the resin is melted by heating using an epoxy resin molded in a flake shape, and the surface is cured by curing. The wave element and the wiring board may be joined.
- the viscosity of the resin can be kept high, the resin is prevented from flowing into the void formed in the surface of the transducer portion of the surface acoustic wave element during curing.
- a frame-shaped insulating partition or dam is not necessarily required because the resin is not a liquid resin.
- the electronic component of the present invention does not require a frame-shaped insulating member or a surrounding member, the electronic component can be downsized. Therefore, an electronic component suitable for high-density mounting can be provided. Further, according to the method for manufacturing an electronic component of the present invention, a functional element can be mounted on a wiring board without the need for a frame-shaped insulating member or a surrounding member, and an electronic component that is smaller than before can be manufactured. be able to. In addition, electronic components suitable for high-density mounting can be manufactured.
- a frame-shaped insulating partition by providing a frame-shaped insulating partition, the sealing effect can be further enhanced, and this is included in the present invention. Furthermore, by forming a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- Liquid thermosetting resins used as conventional sealing resin materials have low viscosities of about 15 Pa ⁇ s, and immediately after heating to 100 to 200 ⁇ Since the viscosity does not increase and remains low, without the frame-shaped insulating member, the flow into the gaps of the surface acoustic wave element and the wiring board cannot be maintained, and the surface acoustic wave propagation of the surface acoustic wave element cannot be maintained. There is a drawback that impairs the hindrance function.
- an example of a resin molded into a flake shape For example, by using an epoxy resin, a high-viscosity state is maintained until melting is started by heating, and by controlling the curing after melting, at least
- a viscosity of 50 Pa ⁇ s or more is obtained. Therefore, the surface acoustic wave element can be easily covered.
- thermosetting resin obtained by cold-compacting a powder material into a flake shape such as an epoxy resin, maintains a viscosity state until melting is started by heating and controls curing after melting.
- a viscosity of at least 50 Pa ⁇ s or more can be obtained. Therefore, the surface acoustic wave element can be easily covered.
- Such a flaky resin can be easily formed by, for example, cold-press molding a powder made from an epoxy resin into a required shape and weight.
- a thermosetting resin is preferable as the resin.
- epoxy resin, silicone resin, urethane resin and the like can be mentioned.
- An epoxy resin is preferable, and a phenol-based epoxy resin is more preferable.
- bisphenol A type epoxy resin and phenol nopolak type epoxy resin are suitable for the electronic component of the present invention.
- the flaky resin is mounted not on the main surface of the surface acoustic wave element on which the wiring pattern is formed but on the other main surface.
- the flaky resin can be obtained by impregnating a non-woven fabric with a powder raw material and punching and molding the impregnated non-woven fabric, instead of cold compression molding the powder raw material.
- the powdered raw material is mixed and dispersed with an organic binder (binder), for example, a PVB (polyvinyl butyral) or acrylic binder, and the resulting sheet is punched or cut into flakes of a desired shape. Resin can also be obtained.
- an organic binder for example, a PVB (polyvinyl butyral) or acrylic binder
- the flaky resin placed on the surface of the surface acoustic wave element where the transducer section and the wiring pattern electrically connected to the transducer section are not formed is heated and melted and cured at least to the other main parts of the element.
- the surface acoustic wave element is sealed with the wiring board by covering the element in close contact with the surface.
- low melting point glass can be used for the same purpose.
- low-melting glass powder (frit) is cold-pressed into flakes. Is used.
- a trace amount of wax or polyvinyl alcohol may be used as a binder.
- the melting point is 250 ⁇ ⁇ 4003 ⁇ 4, more preferably? ⁇ ⁇ ⁇ ⁇ Mi.
- Lead borosilicate glass is suitable. A material containing a small amount of ZnO, Al203, Ti02, Bi203, PbF2, CuO may be used. Among the components of the lead borosilicate glass, those with PbO of 50% by weight or more are most suitable.
- bismuth borosilicate glass may be used in addition to the lead borosilicate glass.
- Such a flaky resin can be easily formed by, for example, cold-press molding a powder made from an epoxy resin into a required shape and weight.
- the flaky resin is placed not on the main surface on which the wiring pattern of the surface acoustic wave element is formed but on another main surface.
- the shape of the flaky resin is larger than the shape of the surface acoustic wave element and is substantially equal to or slightly smaller than the shape of the wiring board. More preferably, the shape of the flaky resin is larger than the shape of the surface acoustic wave element and substantially equal to the shape of the wiring board.
- the size of the flaky resin will be 4 mm 4 mm .
- this dimension can be appropriately selected depending on the volume of the surface acoustic wave element and the thickness of the flaky resin.
- the flaky resin placed on the surface of the surface acoustic wave element, on which the transducer section and the wiring pattern electrically connected to the transducer section are not formed, is heated and melted and cured to at least the other elements.
- the surface acoustic wave element is sealed with the wiring board by covering the element in close contact with the main surface of the element.
- the heating and melting temperature of the flaky resin is 100 to 200, and the curing time is 20 to 2 hours. You. More preferably, heating at 110-170 ⁇ After melting, curing is performed at about 100 ° C. to about 160 ° C. for 3 hours to 20 hours.
- the heating may be direct heating or indirect heating, as long as the amount of heat required to melt or harden the sealing member is applied.
- a heating method such as heating by high frequency, heating by electromagnetic waves, heating by ultrasonic waves, and heating by light irradiation may be used.
- a sealing member made of a heat-melting flaky resin is melted and then heated and hardened to join the wiring board and the functional element.
- the wiring board and the functional element may be joined by dropping or pouring water.
- the method of manufacturing an electronic component of the present invention using such a liquid thermosetting member as a sealing member includes the steps of: (a) disposing the first surface of the wiring board and the first surface of the functional element to face each other; (B) pouring a liquid thermosetting member to a predetermined position from above the first surface and the Z of the wiring board or the second surface of the functional element, and (c) the heat that has been poured. Heat curing the curable member and sealing the gap while leaving at least a gap between the wiring substrate and the functional element.
- the method for manufacturing an electronic component of the present invention using a liquid thermosetting member as a sealing member includes: (a) a step of disposing the first surface of the wiring board and the first surface of the functional element to face each other; (B) a liquid thermosetting member is dropped from above the first surface and the Z of the wiring substrate or the second surface of the functional element to a predetermined position and heat-cured, and at least the wiring substrate and the function Sealing the gap while leaving a gap between the element and the element.
- a functional element is positioned at a predetermined position with respect to a wiring board, and the functional element and the wiring board are assembled while maintaining a predetermined interval via a conductive bonding member. While ripening the wiring board and the functional element while leaving a gap therebetween, a liquid member is dropped on the functional element and adheres to the side of the functional element, and the functional element is covered by curing. Alternatively, the functional element may be sealed with the wiring substrate.
- the electronic component of the present invention includes, for example, a wiring board, and a conductive joint on the wiring board.
- a functional element electrically connected by a face-down bonding method via a member, and the functional element while heating the wiring board and the functional element while leaving a gap between the wiring board and the functional element.
- a drip-type member formed by dropping a liquid member onto the side surface of the functional element and hardening the liquid element to cover the functional element; and a peripheral part of the drip-type member and a peripheral part of the wiring board. And a sealing portion in contact with the sealing member.
- the method of manufacturing the electronic component of the present invention for example, a surface acoustic wave device, which heats and cures a liquid thermosetting member, includes a surface acoustic wave device, which is a functional device, a mounting structure by a face-down bonding method, and a package. While heating the surface acoustic wave element, the liquid member is dropped or poured onto the surface acoustic wave element to increase the viscosity, and the liquid member is wrapped around the surface of the surface acoustic wave element to have an effect as a surface acoustic wave absorbing material.
- the electronic component for example, the surface acoustic wave element is covered, and the surface acoustic wave element and the wiring board are connected to the transducer section provided on the surface acoustic wave element. It is designed to be able to seal while maintaining a gap between the wiring board and the wiring board.
- the heating may be direct heating or indirect heating, as long as the amount of heat necessary to melt or harden the sealing member can be applied.
- a heating method such as high-frequency heating, electromagnetic wave heating, ultrasonic wave heating, light irradiation, or the like may be used.
- a functional element is positioned at a predetermined position with respect to a wiring board, and the functional element and the wiring board are assembled at a predetermined distance via a conductive bonding member, and assembled.
- the functional element While heating the wiring board and the functional element while leaving a gap between the BE wire substrate and the functional element, a liquid member is dropped on the functional element and adheres to the side of the functional element to be cured.
- the functional element may be covered with the wiring board and the functional element may be sealed with the wiring board.
- Such a structure includes a step of arranging a functional element having a bump on a wiring board, and bonding the wiring board and the functional element while irradiating the wiring board and Z or the bump with infrared rays. And a step between the substrate and the element These may be manufactured by a process of sealing these while leaving a gap.
- the manufacturing may be performed by a process and a process of sealing these while leaving a gap between the substrate and the element.
- the infrared rays may be emitted by, for example, a halogen lamp.
- the peripheral part of the sealing member and the peripheral part of the wiring board are sealed by a sealing member that covers the functional element except for a gap formed between the functional element and the wiring board. You may make it seal.
- a sealing member for example, a heat melting type member may be used, or a liquid thermosetting member may be used.
- the method for manufacturing an electronic component of the present invention in which a liquid resin having a property of curing by ripening, photopolymerization, or the like is used as a sealing member to join the wiring board and the functional element by dripping or pouring is used.
- This has the advantage that a simple structure can be obtained without necessarily requiring a frame-shaped insulating member for preventing the resin from flowing into the gap formed between the functional element, for example, the surface acoustic wave element and the wiring board.
- the resin wrapping around the side surface of the surface acoustic wave element also acts as a surface acoustic wave absorbing material (sound absorbing material) that absorbs unnecessary surface acoustic waves, thus attenuating unnecessary spurious and creating a surface acoustic wave device. Performance can be improved.
- the elastic surface wave element is sealed with the wiring board by the curing of the liquid resin.
- a conductive film or a metal foil is formed between the sealing resin and the surface acoustic wave element, a part of the wiring pattern on the wiring board, for example, a ground pattern is connected, so that external noise is generated. The interference due to the noise is reduced and the noise resistance is improved.
- a sealing resin is a functional element.
- the surface acoustic wave absorbing material sound absorption
- the surface acoustic wave element can be sealed with the wiring board by curing the liquid resin.
- a conductive film or a metal foil is formed between a sealing resin and a surface acoustic wave element, and a wiring pattern on a wiring board is formed. Because of the connection with a part of, for example, a ground pattern, interference due to external noise or the like can be reduced, and noise resistance can be improved.
- the metal plate can be flattened by installing a metal plate so that it covers at least a part of the resin on the wiring board.
- a surface acoustic wave device can be provided.
- a bonding strength is increased by first forming a conductive bonding member serving as an electrical connection portion on a wiring pattern of a wiring board, The reliability of the connection can be improved.
- liquid epoxy resin sealing material generally used for sealing a semiconductor may be used.
- the viscosity is preferably higher, and more preferably 15 Pa ⁇ s or more.
- a liquid low-melting glass may be used instead of the resin.
- the glass composition is preferably a lead borosilicate glass, and more preferably a lead borosilicate glass containing PbO in a weight ratio of 50% or more.
- a liquid resin may be used in combination with a liquid low-melting glass.
- Such an electronic component of the present invention is a technology for face-down bonding of a functional element, for example, a surface acoustic wave element or a semiconductor element (a technique of directly flipping a chip upside down without a die bonding and a wire bonding step, and directly attaching the chip to a package; Dictionary, Maruzen Co., Ltd., March 5, 1985, page 1189) Electronic components having a mounting structure by the method.
- the face-down bonding specifically includes a so-called flip-chip method, a beam lead method, a TAB method, and a pedestal method.
- a heat-melting type member obtained by cold-pressing a powder material for example, a thermosetting flaky resin
- the surface or the whole of the resin is melted and cured by heat to seal the surface acoustic wave element and the wiring board while holding a gap between the transducer portion provided on the surface acoustic wave element and the wiring board. It may be stopped.
- a resin having a property of being cured by heating or light polymerization as a sealing member, the surface acoustic wave element and the wiring board are cured by dropping or curing by pouring the resin into a surface acoustic wave element.
- sealing may be performed while maintaining a gap between the transducer section provided in the wiring board and the wiring board.
- Wiring boards that form part of electronic components such as surface acoustic wave devices should have wiring patterns formed on only one main surface or on both main surfaces and other main surfaces, depending on the mounting method. Can be. Alternatively, it is a wiring board with built-in resistance, capacitor and coil functions, in which wiring patterns are formed on one main surface or on both the main surface and the other main surface. Electrically connected ones can be used. Examples of the material of the wiring board include ceramics such as alumina, magnesia, and silicon carbide; glass-coated ceramics; ceramic multilayer boards such as aluminum having conductors and functional parts therein; glass epoxy such as FR-4; A resin substrate can be used. A substrate such as a multilayer substrate or a flexible substrate (including a film carrier) may be used.
- transducer section formed of a comb-shaped electrode pattern on one surface and a wiring pattern electrically connected to the transducer section.
- the joining member is defined as a means for electrically connecting an element (functional element) and a wiring board, and for fixing both.
- bumps and conductive resin are used.
- the bumps include ball bumps and plated bumps
- the conductive resin includes a conductive paste and an anisotropic conductive resin (ACF). In the present invention, these may be used alone or in combination, and these are included in the present invention.
- the close contact means a state where two different members are in contact with each other, and a state where both can be easily separated by an external force. There is a small gap between them It doesn't matter.
- the term “integration” refers to a state in which two different members are in contact with each other and are fixed to such an extent that they cannot be easily separated by an external force.
- a member for electrically joining a wiring pattern on a wiring board to a wiring pattern on a functional element such as a surface acoustic wave element, for example, a conductive bump is made of a resin ball or gold (Ai) coated with a conductive metal. ), Silver (g), solder (Sn-based, Pb-based, In-based, etc.).
- These conductive bumps electrically connect the wiring pattern on the wiring board and the wiring pattern on the functional element by joining the wiring board and the functional element at a predetermined temperature and pressure, and also connect the functional element to the functional element. It plays a role of forming and securing a gap between the wiring board and the wiring board.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the space of the void formed in the present invention is determined by the shape of the conductive bonding member, but it is desirable to secure 10 to 200 / zm, preferably 20 to 80zm. Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the surface acoustic wave element as the conductive bonding member, the wiring pattern on the wiring board and the surface acoustic wave element The upper wiring pattern can also be joined.
- a member that electrically connects the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element, such as a conductive bump, is made of resin ball, gold ( ⁇ ), silver (), (Sn-based, Pb-based, In-based, etc.).
- the conductive ball bumps may be substantially made of gold.
- the conductive ball bump may be substantially made of tin.
- the conductive pole bump may be made of substantially lead.
- the conductive ball bumps may be substantially composed of tin and lead, and the conductive pole bumps may be substantially composed of tin and silver.
- These conductive bumps connect the wiring board and the surface acoustic wave element at a predetermined temperature and pressure. By joining, the wiring pattern on the wiring board and the wiring pattern on the surface acoustic wave element are electrically connected, and the gap between the surface acoustic wave element and the wiring board is formed and secured. Will fulfill.
- a conductive ball bump may be used as the conductive bonding member, and the thickness of the conductive ball bump may be adjusted by changing the thickness of the conductive thin wire.
- a metal bump made of gold, silver, solder, or the like is particularly preferable as the conductive bump.
- the gap of the void formed in the present invention is determined by the shape of the conductive bonding member, it is preferably 10 to 200, preferably 20 to 80 ⁇ . Also, when a bump is formed by partially increasing the thickness of the wiring pattern on the wiring board or the wiring pattern on the surface acoustic wave element as the conductive bonding member, the wiring pattern on the wiring board and the elastic surface are directly formed. The wiring pattern on the wave element can also be joined. Furthermore, by forming a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- Such a structure includes a step of arranging a functional element having a bump on a wiring board, and a step of joining the wiring board and the functional element while irradiating infrared rays to the wiring board and the bump or the bump. And sealing the element while leaving a gap between the substrate and the element.
- the manufacturing may be performed by a process and a process of sealing these while leaving a gap between the substrate and the element.
- the infrared rays may be emitted by, for example, a halogen lamp.
- a peripheral portion of the sealing member and a peripheral portion of the wiring board are sealed by a sealing member that covers the functional element except for a gap formed between the functional element and the wiring board. You may make it seal.
- a sealing member for example, a heat melting type member may be used, or a liquid thermosetting member may be used.
- a surface acoustic wave device for example, a wiring pattern from one main surface of a wiring board is formed between a peripheral edge of a resin portion and a peripheral edge of the wiring board. It may be exposed. Therefore, since the resin portion does not cover the wiring pattern, the resin portion is continuous with the concave wiring pattern formed on the side end surface of the wiring board.
- connection portion on the circuit board and the concave wiring pattern formed on the side end surface of the wiring board are easily soldered. Can be connected.
- an epoxy resin may be used as the resin portion.
- annular insulating partition wall is formed along the inside of each joining member and / or outside each joining member of the trajectory formed by the plurality of joining members. It is characterized by.
- annular insulating partitions play a role in securely holding a gap formed between the surface acoustic wave element and the wiring board.
- a bonded surface acoustic wave element and a wiring board are mounted on a wiring board by covering and hardening with a flaky thermosetting resin.
- a surface acoustic wave device may be configured. At this time, the surface or the whole of the resin is melted by heating using an epoxy resin molded in a flake shape, and the surface acoustic wave device is cured by heating. The element and the wiring board may be joined.
- a frame-shaped insulating partition or dam is not necessarily required because the resin is not a liquid resin.
- the sealing effect can be further enhanced, and is included in the present invention.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- a surface acoustic wave device which is a functional device having a main surface on which a wiring pattern is formed.
- a conductive film is formed over substantially the entire other main surface, and the conductive film and at least a part of the wiring pattern of the wiring board are connected by a conductive material. For this reason, even if external noise is induced, it can be received by the conductive film and grounded through the wiring pattern of the wiring board. It has a so-called electromagnetic shielding effect (shielding effect).
- This conductive substance may be, for example, a substance obtained by applying a conductive resin paste containing a conductor such as silver and hardening the paste, or using an anisotropic conductive resin in which a conductor is embedded therein. Is also good. Also, a metallic thin wire such as J or Ai or Qx formed by well-known wire bonding may be used. These are electrically connected to a wiring pattern on the wiring board, more specifically, a ground pattern, and serve to conduct. Alternatively, the conductive film and at least a part of the wiring pattern of the wiring board may be connected by dispersing a magnetic material such as ferrite in a liquid resin and dropping and curing the resin as described above. Good.
- the resin in which the magnetic material is dispersed includes a conductive film formed on the other main surface of the surface acoustic wave element in a high frequency region, for example, a region of 1 GHz or more, and a ground pattern formed on the wiring board. It serves to connect with.
- a metal foil can be used instead of the conductive film and the conductive material.
- Another aspect of the method for manufacturing an electronic component and a surface acoustic wave device according to the present invention is a method of mounting a metal foil on another main surface of a surface acoustic wave element having a main surface on which a wiring pattern is formed. An end of the foil is contact-connected to at least a part of a wiring pattern of the wiring board.
- the metal foil Even if external noise is induced, it can be received by the metal foil and grounded through the wiring pattern of the wiring board.
- As a material of the metal foil aluminum, copper, nickel, zinc, tin, and the like are preferable.
- the surface acoustic wave element and the wiring board are assembled while maintaining a predetermined interval via an electrical connection portion, and a metal foil is arranged on another main surface of the surface acoustic wave element.
- a liquid member is dropped on the element and adheres to the side of the element.
- the device can be manufactured by enclosing the element with a wiring board, contacting an end of the metallic foil to at least a part of a wiring pattern of the wiring board, and sealing the element with the wiring board.
- a concave portion or a notch portion is formed in at least two places on a side end surface of a wiring board, and a convex portion or a notch portion is formed on an end portion of a metal plate.
- the metal plate is provided so as to form a protruding portion and to cover at least a part of the cured liquid resin that covers the surface acoustic wave element, and a concave portion formed on a side end surface of the wiring board.
- the notch is integrated with a protrusion or a protrusion formed at an end of the metal plate.
- the metal plate has a structure in which the resin portion or the glass portion and the wiring board are covered. With such a structure, marking can be easily formed on the flat portion of the metal plate by a method such as a stamp. .
- the metal plate itself by electrically grounding the metal plate itself to a part of the wiring pattern of the wiring board, and more preferably to a grounding pattern, it is possible to provide not only the ease of marking but also the electromagnetic shielding effect, and to prevent external noise. Can increase resistance.
- a concave portion or a notch portion is formed at at least two places on the side end surface of the wiring board, a convex portion or a projecting portion is formed at an end portion of the metal plate, and the surface acoustic wave element is covered.
- the metal plate is installed so as to cover at least a part of the formed resin, and a concave portion or a notch portion formed on a side end surface of the wiring board and a convex portion or a protrusion formed at an end portion of the metal plate are provided. It can be manufactured by integrating the parts so that they interlock. Further, it can be easily manufactured by using a metal plate that is at least partially flat and formed in a shape substantially parallel to the wiring board.
- a conductive bonding member as an electrical connection portion is formed on a wiring pattern formed on at least one main surface of the wiring board. After that, the element and the wiring board are assembled while maintaining a predetermined interval via the electrical connection portion.
- the thermal history of the interface between the surface acoustic wave element and the conductive connecting member, which is the electrical connection part, during the process can be reduced, so that the bonding strength can be improved and the reliability can be further improved. Can be improved.
- a bonding member serving as an electrical connection portion is first formed on a wiring pattern of a wiring board, thereby increasing bonding strength and improving connection strength. Reliability can be improved.
- an electronic component of the present invention for example, a surface acoustic wave device, by using an assembly of wiring substrates, sealing the resin which is a heat-meltable member, and then dividing it collectively, Since the process can be simplified, productivity can be increased. Further, by performing the steps of heating, melting and curing of the resin stepwise, the sealing property can be improved and the reliability can be improved.
- deterioration of the wiring pattern of the surface acoustic wave element can be reduced. Prevention and improve connectivity.
- the method of manufacturing an electronic component for example, a surface acoustic wave device, according to the present invention, comprises: This is performed by partially changing the thickness of the conductive material of the pattern, or by controlling the height itself of the conductive joining member that is to be an electrical connection portion.
- This is performed by partially changing the thickness of the conductive material of the pattern, or by controlling the height itself of the conductive joining member that is to be an electrical connection portion.
- a proper amount of gap between the functional element for example, the surface acoustic wave element and the wiring board can be effectively secured, so that even in the case of the surface acoustic wave element in which the surface acoustic wave absorbing material is disposed.
- the bonding strength between the surface acoustic wave element and the wiring board can be sufficiently maintained, and the connection reliability can be improved.
- the method for manufacturing an electronic component of the present invention for controlling the facing distance in the void portion includes a first wiring pattern made of a conductive material having a first thickness on the first surface and a thickness larger than the first thickness.
- the method for manufacturing an electronic component of the present invention for controlling the facing distance in the void portion includes a first region made of a substrate material having a first thickness and a second region having a second thickness larger than the first thickness.
- the method for manufacturing an electronic component of the present invention for controlling the facing distance in the void portion includes the following steps: (a) forming the first surface of the wiring board and the first surface of the functional element; A step of arranging and opposing each other while interposing a conductive bonding member in which bumps are stacked in accordance with an interval between the functional element and the wiring pattern on the first surface; Sealing the gap with a sealing member while leaving a gap therebetween.
- the method for manufacturing an electronic component of the present invention for controlling the facing distance in the void portion includes a first surface of the wiring substrate and a first surface of the functional element which is a surface acoustic wave element in which a sound absorbing agent is formed on the first surface. And a step of interposing a conductive bonding member having a height exceeding the thickness of the sound absorbing agent in the opposite direction, and leaving a gap between at least the wiring board and the functional element. Sealing the gap with a sealing member.
- the first surface of the wiring board and the first surface of the functional element which is a surface acoustic wave element are interposed with a conductive bonding member. Forming a sound absorbing agent on the second surface of the functional element. And a step of sealing the gap with a sealing member while leaving a gap between at least the wiring substrate and the functional element.
- the first surface of the wiring board and the first surface of the functional element which is a surface acoustic wave element are interposed with a conductive bonding member.
- One aspect of the method of manufacturing the electronic component of the present invention for example, a surface acoustic wave device, for controlling the gap between the functional element and the wiring board is to form the wiring pattern of the wiring board. It is characterized in that at least a part is applied a plurality of times by a screen printing method using a conductive paste and is baked or baked simultaneously. In this case, the thickness of the part that has been applied multiple times after firing is different from that of the other parts.
- It is preferably in the range of 5 to 100 ⁇ .
- a film forming method such as evaporation or sputtering. It is characterized in that it is formed thicker than other parts. It is preferable that the difference in the thickness of the film formed is at least 5 ⁇ for the electronic component of the present invention.
- Another aspect of the method for manufacturing a surface acoustic wave device of the present invention for controlling a gap between a functional element and a wiring board is a method for forming a wiring board, comprising: a portion facing a joining member serving as an electrical connection portion; The method is characterized in that a green sheet corresponding to an area in the vicinity is added and fired, and thereafter, a wiring pattern is formed on the wiring board.
- the difference between the thickness of the portion fired by adding the green sheet and the thickness of the other portion is substantially in the range of 5 to 500 ⁇ ⁇ .
- an electrical connection portion is provided in order to secure an appropriate amount of void. It is characterized in that a plurality of conductive bumps are stacked at substantially the same position as a conductive bonding member. In this case, the sum of the thicknesses of the plurality of conductive bumps is preferably in the range of 30 to 150 x m.
- a conductive ball bump is used as a conductive bonding member serving as an electrical connection portion, and the thickness of the conductive ball bump is adjusted by changing the thickness of a conductive thin wire.
- the conductive bumps are more preferably ball bumps substantially made of gold, ball bumps substantially made of tin, and ball bumps substantially made of lead.
- the surface acoustic wave absorbing material is applied to at least one principal surface or a part of another principal surface of the surface acoustic wave element, the surface acoustic wave absorbing material is applied to be thinner than the thickness of the conductive joining member. You may.
- a bonding member to be an electrical connection portion on the wiring pattern of the wiring board first, bonding strength can be increased and connection reliability can be improved.
- Examples of the form of the electronic component of the present invention include, for example, a wiring board, and a functional element electrically connected to the wiring board by a face-down bonding method via a conductive bonding member.
- a sealing portion in which the peripheral portion of the sealing member is in contact with the peripheral portion of the wiring board may be provided.
- a functional part is mounted on a first surface of the functional element, and a second part of the functional element is provided.
- the functional element may not be mounted on the surface, and the second surface may be exposed.
- a functional portion may be mounted on the first surface and the second surface of the functional element, and the functional portion on the second surface may be exposed.
- the second surface of these functional elements and the wiring board may be electrically connected by bonding wires.
- a bonding wire may be embedded in the sealing member.
- the sealing member may be heated and melted while exposing the portion to manufacture the sealing member. Further, the liquid sealing member may be manufactured by being hardened by dropping or pouring.
- the sealing member may be provided such that a functional part is mounted on the first surface of the functional element, the functional element is not mounted on the second surface of the functional element, and the entire second surface is exposed. May be melted by heating. Alternatively, a liquid sealing member may be dropped and cured so that the entire second surface is exposed.
- a functional portion is mounted on the first surface and the second surface of the functional element, and the sealing member is heated and melted so that the functional portion on the second surface is exposed. Is also good. Further, a liquid sealing member may be dropped and cured so that the functional portion is exposed.
- the electronic component of the present invention may be, for example, a wiring board, a functional element electrically connected to the wiring board by a face-down bonding method via a conductive bonding member, and surrounding the functional element.
- a surrounding member and a sealing member that covers and surrounds the surrounding member may be provided.
- a functional portion may be mounted on both front and back surfaces of the functional element.
- a functional part includes, for example, a quartz oscillator.
- the surface of the functional element opposite to the surface facing the wiring substrate and the wiring substrate are electrically connected to each other.
- the connection may be made by using.
- Such a structure includes, for example, a step of positioning a functional element at a predetermined position with respect to a wiring board; a step of assembling the element and the wiring board at a predetermined interval via a conductive bonding member; A step of arranging a surrounding member on the wiring board so as to surround the element; a step of arranging a sealing member on the wiring board and the surrounding member; and a step of heating and melting the sealing member. You may do so.
- the liquid sealing member may be manufactured by dropping or pouring and curing the liquid sealing member.
- Examples of the form of the electronic component of the present invention include, for example, a wiring board, and a piezoelectric vibrator in which a first electrode is electrically connected to the wiring board via a conductive bonding member by a face-down bonding method.
- a connection portion for electrically connecting the second electrode of the piezoelectric vibrator and the wiring substrate i, and a gap formed between the first electrode surface of the piezoelectric vibrator and the wiring substrate are left.
- a sealing member that covers the functional element, and a sealing portion in which a peripheral portion of the sealing member and a peripheral portion of the wiring board are in contact with each other may be provided.
- the connection portion may be configured by an electrical connection means such as a bonding wire, an ACF, or a conductive bump.
- Such a structure includes a step of positioning the piezoelectric vibrator at a predetermined position with respect to the wiring board, and maintaining a predetermined gap between the first electrode of the piezoelectric vibrator and the wiring board via a conductive bonding member. And electrically connecting the second electrode surface of the piezoelectric vibrator to the wiring board by a connecting member, and sealing the wiring board and the piezoelectric vibrator on the wiring board. It may be manufactured by a step of disposing a member and a step of heating and melting the sealing member.
- the electronic component of the present invention includes a wiring board, and a light transmitting unit and a light receiving unit that form a pair of photo-power bras electrically connected to the wiring board by a face-down bonding method via a conductive bonding material. And a surrounding member surrounding the photo-power bra, and a sealing member for covering and sealing the surrounding member.
- a pair of photo A step of positioning the light transmitting unit and the light receiving unit to be configured; a step of assembling the photo power blur and the wiring board at a predetermined distance via a conductive bonding member; and surrounding the photo power blur on a wiring board. And a step of disposing a sealing member on the wiring board and the photo-power bra, and a step of ripening and melting the sealing member. .
- a thermosetting sealing member such as a liquid thermosetting resin may be dropped or poured to be cured.
- a wiring board that transmits light, a light transmitting unit or a light receiving unit faces the wiring board, and is electrically connected to the wiring board by a face down bonding method via a conductive bonding member.
- a sealing element for covering the functional element except for a gap formed between the functional element and the wiring substrate; a peripheral portion of the sealing member and the wiring A sealing portion that is in contact with the peripheral portion of the substrate may be provided.
- Examples of such functional elements include photoelectric conversion devices such as EPROM, CCD, semiconductor lasers, and light emitting diodes.
- the optical properties of the wiring board may be selected and used as needed.
- visible light, infrared light, ultraviolet light, or the like may be selectively transmitted, or optically isotropic or anisotropic materials may be used.
- the functional element is an EPROM
- the light-transmitting portion of the wiring board may have optical flat characteristics.
- the functional element is positioned so that a light transmitting unit or a light receiving unit faces the wiring board at a predetermined position with respect to the wiring board transmitting light, Assembling the substrate with a predetermined distance therebetween via a conductive bonding member; disposing a sealing member for the wiring substrate and the element; and sealing the substrate while leaving a gap between the substrate and the element.
- the members may be manufactured by heating and melting. Alternatively, a liquid sealing member may be cured by dripping or pouring, for example.
- FIG. 1 is a cross-sectional view of a surface acoustic wave device according to a first embodiment of the present invention and a partial plan view thereof.
- FIG. 1 is a partial perspective view of a surface acoustic wave device according to a first embodiment of the present invention.
- FIG. 6 is a plan view of a surface acoustic wave device according to Embodiment 2 of the present invention.
- FIG. 6 is a partial perspective view of a surface acoustic wave device according to a second embodiment of the present invention.
- FIG. 9 is an exploded perspective view of a surface acoustic wave device according to a third embodiment of the present invention.
- FIG. 9 is a manufacturing process diagram of the surface acoustic wave device according to Embodiment 3 of the present invention.
- FIG. 9 is a sectional view of a surface acoustic wave device according to a fourth embodiment of the present invention.
- FIG. 9 is a cross-sectional view, a partial plan view, and a partial perspective view of a surface acoustic wave device according to Embodiment 5 of the present invention.
- FIG. 9 is a cross-sectional view, a partial plan view, and an exploded cross-sectional view of a surface acoustic wave device according to Embodiment 6 of the present invention:
- FIG. 14 is a cross-sectional view of a surface acoustic wave device according to Embodiment 7 of the present invention.
- Example 1 is a cross-sectional view of a surface acoustic wave device according to Example 11 of the present invention.
- FIG. 1 is a cross-sectional view of a surface acoustic wave device according to Examples 12 to 13 of the present invention, and a partial perspective view thereof.
- FIG. 9 is a diagram illustrating a method of manufacturing the surface acoustic wave device according to Example 14 of the present invention.
- Fig. 15 is a diagram illustrating a method of manufacturing the surface acoustic wave device according to Example 14 of the present invention.
- FIG. 9 is a diagram showing heating conditions during the production of the surface acoustic wave device according to Example 15 of the present invention.
- FIG. 1 is a cross-sectional view of a surface acoustic wave device according to Example 18 of the present invention and a partial plan view thereof.
- FIG. 9 is a cross-sectional view of a surface acoustic wave device according to Example 19 of the present invention and a partial plan view thereof.
- FIG. 2 is a cross-sectional view of a surface acoustic wave device according to Example 20 of the present invention and a partial plan view thereof.
- FIG. 9 is a plan view of a surface acoustic wave device according to Example 20 of the present invention.
- FIG. 2 is a plan view of a conventional surface acoustic wave device.
- FIG. 11 is a plan view of a surface acoustic wave device according to Example 21 of the present invention.
- FIG. 9 is a plan view of a surface acoustic wave device according to Example 21 of the present invention.
- FIG. 9 is a sectional view of a surface acoustic wave device according to Example 22 of the present invention.
- Fig. 25 is a sectional view of a surface acoustic wave device according to Example 22 of the present invention.
- FIG. 9 is a sectional view of a surface acoustic wave device according to Example 23 of the present invention.
- FIG. 2 is a cross-sectional view and a partial cross-sectional view of a surface acoustic wave device according to Examples 24 to 26 of the present invention. '
- FIG. 9 is a cross-sectional view and a partial cross-section of a surface acoustic wave device according to Example 27 of the present invention.
- FIG. 9 is a sectional view of a surface acoustic wave device according to Example 28 of the present invention and a partial plan view thereof.
- FIG. 13 is a diagram illustrating a manufacturing process of the surface acoustic wave device according to Example 28 of the present invention.
- Fig. 30 is a diagram illustrating a manufacturing process of the surface acoustic wave device according to Example 28 of the present invention.
- FIG. 9 is a cross-sectional view, a partial plan view, and a partial perspective view of a surface acoustic wave device according to Example 29 of the present invention.
- FIG. 9 is a cross-sectional view of a surface acoustic wave device according to Example 30 of the present invention and a partial plan view thereof.
- FIG. 1 is a cross-sectional view of a surface acoustic wave device according to Examples 31 to 32 of the present invention and a partial perspective view thereof.
- FIG. 14 is a sectional view of a surface acoustic wave device according to Example 34 of the present invention.
- FIG. 15 is a sectional view of a surface acoustic wave device according to Example 35 of the present invention.
- FIG. 13 is a cross-sectional view of a crystal vibrating device according to Example 36 of the present invention.
- FIG. 13 is a sectional view of a piezoelectric vibrating device according to Embodiment 37 of the present invention.
- FIG. 9 is a cross-sectional view and a partial perspective view of a photo force bra according to Example 38 of the present invention.
- FIG. 9 is a cross-sectional view and a partial plan view of an EPROM according to Example 39 of the present invention.
- FIG. 14 is a cross-sectional view of a CCD according to Example 40 of the present invention.
- FIG. 13 is a sectional view of a semiconductor laser according to Example 41 of the present invention.
- FIG. 19 is a diagram illustrating a method for manufacturing the surface acoustic wave device according to Example 42 of the present invention.
- Fig. 4 2
- FIG. 13 is a diagram illustrating a method for manufacturing the surface acoustic wave device according to Example 43 of the present invention.
- Fig. 4 3 is a diagram illustrating a method for manufacturing the surface acoustic wave device according to Example 43 of the present invention.
- FIG. 15 is a sectional view of a CCD camera according to Embodiment 44 of the present invention.
- FIG. 16 is a process diagram of a mobile communication device according to Embodiment 45 of the present invention.
- FIG. 14 is a circuit diagram of an oscillation circuit according to Example 46 of the present invention.
- Embodiment 1 In the first embodiment, the present invention is applied to a surface acoustic wave device.
- FIG. 1A is a cross-sectional view of the surface acoustic wave device according to the first embodiment.
- a wiring board 1 has a conductive wiring pattern 2 formed on both surfaces of an insulating substrate, for example, a resin substrate made of ceramic, glass-coated ceramic, glass epoxy, or the like. Further, on one principal surface of the surface acoustic wave element 3, a transducer section 4 composed of a comb-shaped electrode pattern and a wiring pattern 5 electrically connected to the transducer section are formed. Also, the surfaces of the transducer section 4 and the wiring pattern 5 are disposed so as to face the wiring pattern 2 formed on the wiring board 1.
- a plurality of conductive patterns are formed by face-down bonding. It is assembled via a conductive bonding member, for example, a bump 6 made of metal. These bumps are made of gold (Ai), silver (g), solder (Sn-based, Pb-based, In-based, etc.). Further, the connection between the surface acoustic wave element 3 and the wiring board 1 by the conductive bumps 6 and the surface acoustic wave element 3 are covered with a resin part 11 such as epoxy.
- FIG. 2 is a perspective view showing the wiring board 1 for explaining one mode in the first embodiment. That is, the wiring pattern 2 from one main surface of the wiring board is exposed between the peripheral edge of the resin portion (not shown) and the peripheral edge of the wiring board 1. Is continuous with the circular wiring pattern 12 formed on the substrate. For this reason, when electrically connecting each wiring pattern of the wiring board and the surface acoustic wave element by soldering, the wiring pattern of the wiring board is exposed and the solder area becomes large, so that the soldering work becomes easy. And the electrical connection is made reliably.
- Example 2
- FIG. 3 is a plan view showing the wiring board 1 according to the second embodiment.
- FIG. 3 a dotted line 13 indicates a locus 13 formed by the plurality of conductive bumps 13.
- the position where an annular insulating partition wall is formed along the inside 14 of each bump and the outside 15 of each bump of the trajectory 13 is shown.
- FIG. 4 is a schematic perspective view of the insulating partition wall 17.
- the insulating partition 17 may be provided on one of the inside 14 of the bump and the outside 15 of the bump.
- FIG. 5 is a schematic diagram showing the positional relationship among the resin portion 11, the surface acoustic wave element 3, and the wiring board 1 before assembling the surface acoustic wave device of the present embodiment.
- 6 (c) shows the steps in order.
- FIG. 6A shows a state in which the surface acoustic wave element 3 is joined to the wiring board 1 via a plurality of conductive bumps provided on the surface acoustic wave element 3, and as shown in FIG.
- the molded flaky resin 16 is placed on the wave element 3. Thereafter, by heating at 150 ° C for about 1 minute, the flaky resin 16 melts almost entirely while maintaining high viscosity, and wraps the surface acoustic wave element 3 as shown in Fig. 6 (c). Deformed before overturning The surroundings are joined to the wiring board 1, and then the resin is hardened and the resin shape is determined by subsequent ripening. Subsequent heating, for example, heating at 125 t for 3 hours and further heating at 150 ° C.
- the heating may be direct heating or indirect heating, as long as the amount of heat necessary to melt or cure the sealing member is applied.
- a heating method such as heating by high frequency, heating by electromagnetic waves, heating by ultrasonic waves, and heating by light irradiation may be used. This is the same even when not stated otherwise.
- the resin 16 Since the resin 16 has a sufficiently high thixotropic property and a high viscosity, it does not flow into a part of the transducer surface of the surface acoustic wave element.
- the frame-shaped insulating member is not necessarily prevented from flowing into the void formed between the main surface of the surface acoustic wave element on the transducer side and the wiring board, for example.
- This has the advantage that a surface acoustic wave device having a simple structure that can be prevented without being required is obtained.
- the electronic component of the present invention does not require the frame-shaped insulating member or the surrounding member, the size of the electronic component can be reduced. Therefore, an electronic component suitable for high-density mounting can be provided.
- a functional element can be mounted on a wiring board without the need for a frame-shaped insulating member or a surrounding member. Can be.
- electronic components suitable for high-density mounting can be manufactured.
- the scattering substance of the organic adhesive does not adhere to the comb-shaped electrodes of the surface acoustic wave element 3 so that the surface acoustic wave element can be elastically bonded.
- the sealing and assembling by mass production can be performed more reliably without lowering the function of the surface acoustic wave element 3, and the yield can be improved.
- the flaky resin as described above can be easily formed by cold compression molding an epoxy resin, for example, a powder made of an epoxy resin into a required shape and weight.
- an epoxy resin for example, a powder made of an epoxy resin into a required shape and weight.
- Nitto Denko Corporation Epoxy EP for sealing is suitable.
- a reinforcing sheet may be integrally impregnated with a powder made of an epoxy resin as a raw material, and may be cold-punched into a required shape. It is necessary to control the heating, melting and curing conditions of the flaky resin appropriately. It is appropriate to carry out the heat melting and curing at a temperature of 100 to 200 and a curing time of 20 to 2 hours. More preferably, after heating and melting at 110 to 170 ° C. for about 1 minute, curing is performed at 100 ° C. to 160 ° C. for about 3 hours. And may be included in the present invention.
- FIG. 7 shows a method of manufacturing the surface acoustic wave device according to the fourth embodiment.
- a shape in which the peripheral portion is hung in advance is positioned in the same manner as in FIG. 6, and placed on the surface of the surface acoustic wave element where the transducer section and its wiring pattern are not formed. And then heat and melt and cure. According to this method, it is possible to shorten the assembling time in covering the back surface of the surface acoustic wave element in close contact with the circuit board and sealing the circuit board.
- FIG. 47 (a) A method of manufacturing a surface acoustic wave device according to this application example is shown in FIG. 47 (a). That is, in the method of manufacturing the surface acoustic wave device shown in the third embodiment, the positioning means for the flaky resin 16 with respect to the surface acoustic wave device 3, for example, a part of the surface of the flaky resin 16 on the surface acoustic wave device 3 side Is provided with a concave portion. In this concave portion, a concave portion slightly larger than the outer shape of the surface acoustic wave element 3 is provided. By doing so, it becomes convenient when the flaky resin 16 is manually or automatically arranged on the surface acoustic wave element 3.
- the flaky resin 16 when the flaky resin 16 is placed on the element 3 by vacuum check using an automounter (automatic transfer device), the positioning can be reliably performed, and productivity is improved. It is also possible to provide a slight gap at the bottom of this concave part to form a gap between the top of the element 3 and the resin 16 to slightly form the air part, and the surface acoustic wave caused by the warpage (deformation) of the element 3 Without deteriorating the characteristics. Further, as shown in FIG. 47 (b), when the concave portion 16a formed in the resin 16 is formed in two steps as a shape, a void portion is provided in a narrow concave portion in advance, and then heat melting is performed. A gap is easily formed between the element and the element 3, and the effect of the cushioning material (by gas) is exerted.
- FIG. 8A is a sectional view of the surface acoustic wave device according to the fifth embodiment.
- a wiring board 1 has a conductive wiring pattern 2 formed on both surfaces of an insulating substrate, for example, a resin substrate made of ceramic, glass-coated ceramic, glass epoxy, or the like.
- an insulating substrate for example, a resin substrate made of ceramic, glass-coated ceramic, glass epoxy, or the like.
- a transducer portion 4 composed of a comb-shaped electrode pattern and a wiring pattern 5 electrically connected to the transducer portion are formed.
- a conductive film 31 in which aluminum is deposited almost entirely is formed on the other main surface of the surface acoustic wave element 3.
- the surfaces of the transducer section 4 and the wiring pattern 5 are assembled with the wiring pattern 2 formed on the wiring board 1 by face-down bonding via a plurality of conductive bonding members, for example, bumps 6 made of metal.
- the two wiring patterns 2 and 5 facing each other are electrically connected, and a gap 10 is formed between the surface acoustic wave element 3 and the wiring board 1.
- the bumps are made of gold ( ⁇ ), silver (g), solder (Sn-based, Pb-based, In-based, etc.).
- the conductive film 31 on the other main surface of the surface acoustic wave element 3 and a part of the wiring pattern 2 of the wiring board 1 are electrically connected by the conductive substance 32.
- connection between the surface acoustic wave element 3 and the wiring board 1 by the conductive bumps 6 and the surface acoustic wave element 3 are made of a resin portion mainly composed of a thermosetting bisphenol A type epoxy resin which is a heat-melting type member.
- FIG. 8 (b) shows an example of a plan view of the wiring board 1 before being covered with the resin portion 11, and shows another example of the surface acoustic wave element 3.
- the conductive film 31 formed on the surface is electrically connected to a part of the wiring pattern 2 of the wiring board 1, for example, a ground pattern via the conductive substance 32.
- the conductive substance 32 includes, for example, an epoxy-based conductive paste including a bonding wire such as a copper wire, an A wire, and a Cu wire, an anisotropic conductive resin (ACF), and the like.
- examples of the conductive film 31 include an A film, an Ax film, and the like formed by vapor deposition or sputtering.
- FIG. 9A is a cross-sectional view of the surface acoustic wave device according to the sixth embodiment.
- a wiring board 1 has conductive wiring patterns 2 formed on both surfaces of an insulating substrate, for example, a resin substrate such as a ceramic, a glass-coated ceramic, and a glass epoxy.
- an insulating substrate for example, a resin substrate such as a ceramic, a glass-coated ceramic, and a glass epoxy.
- a transducer portion 4 formed of a comb-shaped electrode pattern and a wiring pattern 5 electrically connected to the transducer portion are formed.
- the surfaces of the transducer section 4 and the wiring pattern 5 are assembled with the wiring pattern 2 formed on the wiring board 1 by face-down bonding via a plurality of conductive bonding members, for example, bumps 6 made of metal.
- the two wiring patterns 2 and 5 facing each other are electrically connected, and a gap 10 is formed between the surface acoustic wave element 3 and the wiring board 1.
- the bumps are made of gold (Ai), silver (fig), solder (Sn-based, Pb-based, In-based, etc.). Further, at least a part of the gap between the other main surface of the surface acoustic wave element 3 and the resin portion 11 is provided with a metal foil 33, and an end 3 4 of the metal foil 3 3 is provided. Are in contact with at least a part of the wiring pattern 2 of the wiring board 1 and are electrically connected. Further, the connection between the surface acoustic wave element 3 and the wiring board 1 by the conductive bumps 6 and the surface acoustic wave element 3 are covered with a resin part 11 of a thermosetting epoxy resin.
- FIG. 9 (b) shows an example of a plan view of the wiring board 1 before being covered with the resin portion 11, and shows the metallic surface mounted on the other main surface of the surface acoustic wave element 3.
- An end 34 of the foil 33 contacts a part of the wiring pattern 2 of the wiring board 1, for example, a ground pattern, and is electrically connected.
- a metallic foil 33 As such a metallic foil 33, a well-known inexpensive aluminum foil such as an aluminum foil can be used. Further, a copper foil, a nickel foil, a zinc foil, a tin foil, or the like may be used. In particular, copper foil is advantageous for higher frequency noise because of its low resistivity.
- FIG. 9 (c) shows an example of a method for manufacturing a surface acoustic wave device of the present invention
- the metallic foil 33 is bonded in advance to the resin portion 11 made of the heat-meltable flaky resin 16. Thereafter, the flaky resin may be melted by heat. In this case, the positioning accuracy can be further improved.
- heating regardless of direct heating or indirect heating, it is only necessary to apply heat required to melt or cure the sealing member.
- a heating method such as heating by high frequency, heating by electromagnetic waves, heating by ultrasonic waves, and heating by irradiation of light may be used.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Acoustics & Sound (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
- Wire Bonding (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Combinations Of Printed Boards (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970709809A KR19990028493A (ko) | 1995-06-30 | 1996-05-31 | 전자부품 및 그 제조방법 |
US08/973,858 US6262513B1 (en) | 1995-06-30 | 1996-05-31 | Electronic component and method of production thereof |
JP50497697A JP3825475B2 (ja) | 1995-06-30 | 1996-05-31 | 電子部品の製造方法 |
EP96920032A EP0840369A4 (en) | 1995-06-30 | 1996-05-31 | ELECTRONIC COMPONENT AND ITS MANUFACTURING METHOD |
US09/772,859 US6754950B2 (en) | 1995-06-30 | 2001-01-31 | Electronic component and method of production thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7/164379 | 1995-06-30 | ||
JP16437995 | 1995-06-30 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/973,858 A-371-Of-International US6262513B1 (en) | 1995-06-30 | 1996-05-31 | Electronic component and method of production thereof |
US09/774,047 Division US6628043B2 (en) | 1995-06-30 | 2001-01-31 | Electronic component and method of production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997002596A1 true WO1997002596A1 (fr) | 1997-01-23 |
Family
ID=15792014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/001492 WO1997002596A1 (fr) | 1995-06-30 | 1996-05-31 | Composant electronique et son procede de fabrication |
Country Status (6)
Country | Link |
---|---|
US (3) | US6262513B1 (ja) |
EP (1) | EP0840369A4 (ja) |
JP (1) | JP3825475B2 (ja) |
KR (1) | KR19990028493A (ja) |
CN (1) | CN1146029C (ja) |
WO (1) | WO1997002596A1 (ja) |
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- 1996-05-31 CN CNB96196393XA patent/CN1146029C/zh not_active Expired - Fee Related
- 1996-05-31 JP JP50497697A patent/JP3825475B2/ja not_active Expired - Lifetime
- 1996-05-31 WO PCT/JP1996/001492 patent/WO1997002596A1/ja not_active Application Discontinuation
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EP0862213A2 (en) * | 1997-02-27 | 1998-09-02 | Oki Electric Industry Co., Ltd. | Semiconductor apparatus, circuit board and combination thereof |
EP0862213B1 (en) * | 1997-02-27 | 2004-05-06 | Oki Electric Industry Co., Ltd. | Semiconductor apparatus, circuit board and combination thereof |
US6722030B1 (en) | 1998-02-18 | 2004-04-20 | Epcos Ag | Process for manufacturing an electronic component, in particular a surface-wave component working with acoustic surface waves |
WO1999043084A1 (de) * | 1998-02-18 | 1999-08-26 | Epcos Ag | Verfahren zur herstellung eines elektronischen bauelements, insbesondere eines mit akustischen oberflächenwellen arbeitenden ofw-bauelements |
EP1076930A4 (en) * | 1998-04-08 | 2001-11-14 | Cts Corp | HOUSING AND MANUFACTURING METHOD FOR ACOUSTIC SURFACE WAVE ARRANGEMENT |
EP1076930A1 (en) * | 1998-04-08 | 2001-02-21 | CTS Corporation | Surface acoustic wave device package and method |
JP2000151347A (ja) * | 1998-11-06 | 2000-05-30 | Hitachi Media Electoronics Co Ltd | 表面実装型弾性表面波フィルタ |
US7134196B2 (en) | 2000-12-18 | 2006-11-14 | Tdk Corporation | Electronic device and manufacturing same |
JP2002203989A (ja) * | 2000-12-21 | 2002-07-19 | Lumileds Lighting Us Llc | 発光装置及びその製造方法 |
JP2003017979A (ja) * | 2001-06-28 | 2003-01-17 | Nagase Chemtex Corp | 弾性表面波デバイスおよびその製法 |
US6873034B2 (en) | 2002-02-20 | 2005-03-29 | Sharp Kabushiki Kaisha | Solid-state imaging device, method for producing same, and mask |
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US7183124B2 (en) | 2002-10-04 | 2007-02-27 | Toyo Communication Equipment Co., Ltd. | Surface mount saw device manufacturing method |
US7261792B2 (en) | 2002-12-06 | 2007-08-28 | Murata Manufacturing Co., Ltd. | Method of producing piezoelectric component and piezoelectric component |
US7816794B2 (en) | 2004-12-24 | 2010-10-19 | Fujitsu Media Devices Limited | Electronic device and method of fabricating the same |
JP2006295164A (ja) * | 2005-04-06 | 2006-10-26 | Korea Advanced Inst Of Sci Technol | イメージセンサモジュール及びその製造方法 |
JP4611235B2 (ja) * | 2005-04-06 | 2011-01-12 | 韓国科学技術院 | イメージセンサモジュール及びその製造方法 |
JP2007051184A (ja) * | 2005-08-16 | 2007-03-01 | Shin Etsu Chem Co Ltd | 熱硬化型エポキシ樹脂組成物及びそれを用いた半導体装置 |
JP2007104401A (ja) * | 2005-10-05 | 2007-04-19 | Sony Corp | 半導体装置及びその製造方法 |
JP2007250852A (ja) * | 2006-03-16 | 2007-09-27 | Asahi Glass Co Ltd | 発光装置の製造方法 |
US8093101B2 (en) | 2006-11-14 | 2012-01-10 | Taiyo Yuden Co., Ltd. | Electronic device and method of fabricating the same |
KR101129107B1 (ko) | 2007-12-11 | 2012-03-23 | 가부시키가이샤 무라타 세이사쿠쇼 | 표면파 장치 및 듀플렉서 |
JP2017005161A (ja) * | 2015-06-12 | 2017-01-05 | 株式会社東芝 | 基板装置 |
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WO2020130051A1 (ja) * | 2018-12-20 | 2020-06-25 | 株式会社村田製作所 | 弾性波素子および弾性波装置 |
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JP2020123906A (ja) * | 2019-01-31 | 2020-08-13 | 株式会社大真空 | 圧電振動デバイス |
TWI707192B (zh) * | 2019-03-08 | 2020-10-11 | 大陸商三贏科技(深圳)有限公司 | 結構光投射模組及其電子裝置 |
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Also Published As
Publication number | Publication date |
---|---|
US6754950B2 (en) | 2004-06-29 |
US6628043B2 (en) | 2003-09-30 |
EP0840369A4 (en) | 2001-12-19 |
US20020149298A1 (en) | 2002-10-17 |
CN1194058A (zh) | 1998-09-23 |
US20010009342A1 (en) | 2001-07-26 |
US6262513B1 (en) | 2001-07-17 |
JP3825475B2 (ja) | 2006-09-27 |
KR19990028493A (ko) | 1999-04-15 |
EP0840369A1 (en) | 1998-05-06 |
CN1146029C (zh) | 2004-04-14 |
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