WO2005071731A1 - 電子部品の製造方法 - Google Patents
電子部品の製造方法 Download PDFInfo
- Publication number
- WO2005071731A1 WO2005071731A1 PCT/JP2004/018211 JP2004018211W WO2005071731A1 WO 2005071731 A1 WO2005071731 A1 WO 2005071731A1 JP 2004018211 W JP2004018211 W JP 2004018211W WO 2005071731 A1 WO2005071731 A1 WO 2005071731A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mounting
- resin film
- resin
- sealing
- electronic functional
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 229920005989 resin Polymers 0.000 claims abstract description 139
- 239000011347 resin Substances 0.000 claims abstract description 139
- 238000000034 method Methods 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims description 92
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- 229920005992 thermoplastic resin Polymers 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 2
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- IEQUNHXCJVILJQ-UHFFFAOYSA-N aluminum palladium Chemical compound [Al].[Pd] IEQUNHXCJVILJQ-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
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- 230000001788 irregular Effects 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 238000007781 pre-processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
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- 238000004062 sedimentation Methods 0.000 description 1
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Classifications
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- 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
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- H—ELECTRICITY
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- 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
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- 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
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- 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
- H01L21/565—Moulds
- H01L21/566—Release layers for moulds, e.g. release layers, layers against residue during moulding
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67126—Apparatus for sealing, encapsulating, glassing, decapsulating or the like
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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
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- H01L2224/10—Bump connectors; Manufacturing methods related thereto
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- H01L2224/97—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
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- H01L2924/01068—Erbium [Er]
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- H01L2924/01079—Gold [Au]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/095—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00 with a principal constituent of the material being a combination of two or more materials provided in the groups H01L2924/013 - H01L2924/0715
- H01L2924/097—Glass-ceramics, e.g. devitrified glass
- H01L2924/09701—Low temperature co-fired ceramic [LTCC]
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T29/43—Electric condenser making
- Y10T29/435—Solid dielectric type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49146—Assembling to base an electrical component, e.g., capacitor, etc. with encapsulating, e.g., potting, etc.
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
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- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
- Y10T29/49158—Manufacturing circuit on or in base with molding of insulated base
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49169—Assembling electrical component directly to terminal or elongated conductor
- Y10T29/49171—Assembling electrical component directly to terminal or elongated conductor with encapsulating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49169—Assembling electrical component directly to terminal or elongated conductor
- Y10T29/49171—Assembling electrical component directly to terminal or elongated conductor with encapsulating
- Y10T29/49172—Assembling electrical component directly to terminal or elongated conductor with encapsulating by molding of insulating material
Definitions
- the present invention is directed to the manufacture of a laminated CSP electronic component in which an electronic functional element such as a SAW element is bonded to a substrate in a chip size package (CSP) and a resin film is embedded by heat press. It is about the method.
- chip size packages of various structures have been developed in order to reduce the size and height of the knock of a surface acoustic wave filter (SAW).
- SAW surface acoustic wave filter
- Patent Documents 1 and 2 As a method for manufacturing such a resin-sealed package, a heat press method is known.
- the sealing technology by the heat press method is disclosed in Patent Documents 1 and 2.
- the SAW element is mounted on the mounting board by flip-chip bonding so that a vibration space is formed between the mounting board and the SAW element mounted on the mounting board. Then, resin sealing is performed by a heat press method.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-17979
- Patent Document 2 JP 2003-32061 A
- An object of the present invention is to provide a method for manufacturing an electronic component that can be manufactured with simple equipment and is less likely to generate voids and deteriorate characteristics over time.
- the method for manufacturing an electronic component of the present invention includes mounting a plurality of electronic functional elements each having a substrate and an electronic functional unit provided on the substrate on a mounting assembly substrate. A mounting step of mounting and mounting, a placement step of placing a resin film on each of the electronic functional elements mounted on the mounting collective board, and an electronic functional element and the resin film mounted on the mounting collective board.
- each electronic functional element is sealed with the sealing resin portion derived from the resin film in the bag under reduced pressure, so that the sealing resin due to the incorporation of air is used.
- the generation of voids can be reduced, and the deterioration of strength over time and the deterioration of characteristics due to moisture absorption and the deterioration of durability can be suppressed.
- the electronic functional element may be a surface acoustic wave element having a vibrating part as the electronic functional part on a piezoelectric substrate.
- the vibrating portion is provided so as to have a space between the vibrating portion and the mounting collective substrate, and is arranged so as to face the mounting collective substrate.
- the resin film contains a filler, and in the particle size distribution of the filler, the maximum particle size is larger than the gap between the electronic functional element and the mounting collective board; It is preferable that the occupancy of the filler having a particle size larger than the gap between the electronic functional element and the mounting collective board is 5% by weight or more based on the entire filler.
- the amount of infiltration of the sealing resin can be adjusted, and for example, a necessary space can be secured in a portion facing the vibration portion, It can be suitable for manufacturing a surface acoustic wave device.
- the sealing step may further include a thermocompression bonding step of heating the resin film to soften the resin film and pressing the resin film with a roller or a press. According to the above method, the sealing with the resin film can be speeded up by pressing with the roller.
- the arranging step includes a step of attaching a release sheet to one surface of the resin film, and a step of separating the resin film on a mounting collective board on which electronic functional elements are mounted. And arranging the mold sheet so that the mold sheet side is on the outside.
- the sealing resin and the bag are heated by heating when the resin film is softened or when the sealing resin is cured by the resin film force. Can be avoided from being bonded, and manufacturing can be facilitated.
- the surface roughness of the release sheet on the resin film side is 0.01 m-1 O / zm. According to the above method, by setting the surface roughness of the release film on the resin film side to 0.01 m to 10 m, the surface roughness of the top surface of the sealing resin is also 0.01 ⁇ m to 10 m. And the recognition rate of printing on the top surface can be improved.
- the mounting step may be a flip-chip bonding step of flip-chip bonding and mounting the plurality of electronic functional elements via bumps.
- the bag has a multilayer structure having a thermoplastic resin layer in the innermost layer and a heat-resistant resin layer having heat resistance and gas nori- ity more than the thermoplastic resin layer in the outermost layer. It may be made. According to the above method, by adopting the multilayer structure in the bag, the heat sealability can be more reliably imparted to the bag.
- each of the electronic functional elements and the resin film mounted on the mounting collective board are put in a gas-nolia bag and sealed.
- the pressure reduction packing step and the resin film being infiltrated between the electronic function elements mounted on the mounting pack board packed with the pressure reduction by utilizing a pressure difference between the inside and outside of the bag, thereby obtaining the electronic functions.
- the above method can reduce the generation of voids due to infiltration under reduced pressure, suppress the deterioration of durability such as deterioration of strength over time and characteristic deterioration due to moisture absorption, and reduce the pressure only in the bag. Therefore, the above-mentioned reduced pressure can be realized by a simple decompression device, and the conventional large-scale device for reducing the whole pressure can be omitted.
- FIGS. 1A to 1E are process diagrams showing a method for manufacturing an electronic component as one embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a SAW device as an electronic component used in an embodiment of the present invention.
- FIG. 3 is a schematic configuration diagram showing a vacuum packing step in the embodiment of the present invention.
- FIG. 4 is a schematic configuration diagram showing a curing step in the embodiment of the present invention.
- FIG. 5 is a cross-sectional view showing one step of a method for manufacturing an electronic component according to another embodiment of the present invention.
- FIG. 6 is a graph showing the relationship between the surface roughness of the top surface of the sealing resin of the SAW device as an electronic component used in an embodiment of the present invention and the recognition rate in laser printing on the top surface. It is a graph which shows a relation result.
- FIG. 7 is a cross-sectional view showing another example of the electronic component used in the present invention.
- FIG. 8 is a schematic configuration diagram showing another example of the infiltration step in the present invention.
- FIG. 9 is a schematic configuration diagram showing still another example of the infiltration step in the present invention.
- Figure 10 shows the relationship between the vibrating part of the sealing resin and the mounting board when the occupation ratio of the filler having a larger particle size than the gap between the SAW element and the mounting collective board in the total filler is changed.
- FIG. 4 is a diagram showing a change in the amount of intrusion into the space of FIG.
- the structure of a SAW element CSP manufactured by the method for manufacturing an electronic component of the present invention will be described.
- the SAW element (electronic functional element) 2 is mounted on the mounting substrate 1 by flip chip bonding.
- the SAW element is mounted so that the space 5 is secured so as not to hinder the vibration of the SAW element.
- the mounting substrate 1 is made of, for example, alumina, glass epoxy, or the like having electrical insulation properties such as ceramic resin.
- the mounting board 1 has, on the surface facing the SAW element 2, a land la as an electrode for connection with the SAW element 2, a via hole lb penetrating the mounting board 1 in the thickness direction, and the above-described via hole.
- An external terminal lc which is electrically connected to the land la via the lb, is provided.
- the SAW element 2 has at least one comb-shaped electrode portion on a piezoelectric substrate 2a as an electronic function portion, that is, a vibrating portion 2b.
- the vibrating part 2b in the SAW element 2 is This is the area where the surface acoustic wave propagates.
- the mounting board 1 and the SAW element 2 are connected to each other by being joined on the land la by the protruding electrode 3 formed on the SAW element 2 or the land la.
- the bonding by the protruding electrodes 3 includes Au—Au bonding, solder bonding, and plating bump bonding.
- the vibrating portion 2 b having the comb-shaped electrode portion is formed on the surface of the SAW element 2 facing the mounting board 1.
- the vibrating portion 2 b faces a space 5 formed by the height of the protruding electrode 3. Therefore, the existence of the space 5 does not hinder the excitation propagation of the surface acoustic wave in the vibrating portion 2b! /.
- the distance between the SAW element 2 and the mounting board 1 is set to about 19 m.
- the above interval should not be particularly limited as long as it is set as required, but is preferably 5 / zm or more. If the value is less than the above, the surface of the SAW element 2 may come into contact with the mounting substrate 1 due to warpage or unevenness of the mounting substrate 1.
- the protruding electrode 3 is connected to the SAW element 2, which electrically connects the SAW element 2 and the mounting board 1, and the SAW element 2 is mounted on the mounting board 1.
- a protruding electrode for simply mechanically fixing the electrode may be provided.
- a protruding electrode formed to maintain a space between the mounting board 1 and the SAW element 2 may be provided.
- the SAW element 2 is covered and sealed by a sealing resin part 4.
- the material of the sealing resin portion 4 is not particularly limited as long as it has a sealing property and an adhesive property. Examples thereof include thermosetting or thermoplastic resins such as epoxy, polyimide, polyolefin, silicone, and phenol. Resins can be used. In the present embodiment, an epoxy system is used! The curing temperature of the above epoxy resin is 150 ° C, but the curing temperature of the epoxy resin is approximately between 80 ° C and 200 ° C.
- the material constituting the sealing resin portion 4 may contain a filler.
- the filler is not particularly limited, but an appropriate inorganic filler commonly used in resin compositions can be used. Examples of such an inorganic filler include powders of metal oxides such as silica, alumina, magnesium, and calcium oxide. The shape of the filler may be spherical or irregular.
- the filler has a maximum particle size that is larger than the gap between the SAW element 2 and the mounting substrate 11. It is preferable that the distance between adjacent SAW elements 2 is smaller than 1Z2 or less, more preferably 1Z4 or less, and the particle size is larger than the gap between the SAW element 2 and the mounting collective substrate 11. Occupancy is preferably 5% by weight or more with respect to all the fillers.
- FIG. 10 and Table 1 show the relationship between the vibrating portion 2b and the mounting board 1 when the occupation ratio of the filler having a larger particle size than the gap is changed in manufacturing the surface acoustic wave device of the present embodiment.
- the amount of intrusion is represented by the relative amount (%) of the amount of intrusion.
- the relative amount (%) of the infiltration amount is defined as 100% of the infiltration amount of the sealing resin portion 4 into the space 5 when the occupancy power of the filler having a particle size larger than the gap is ⁇ wt%. It means the ratio of the amount of resin infiltrated into the space 5 with respect to the 100%.
- the particle size is defined by the size of the sieve when each sieve of each size! / And each sieve of the eyes! / Is passed through the filter! In addition to the sieve, the particle size may be specified by a classifier (scattering by air or difference in sedimentation speed).
- the manufacturing method includes at least a mounting step, an arranging step, a vacuum (decompression) packing step, a sealing step, and a dividing step, and performs the steps in this order.
- a vibrating portion 2b, an electrode pad (not shown), and a wiring pattern for electrically connecting the two are formed on a piezoelectric substrate 2a by using a conductive metal, for example, aluminum-palladium.
- a conductive metal for example, aluminum-palladium.
- the mounting step is, as shown in FIG. 1 (a), a step of flip-chip bonding a plurality of SAW elements 2 on a mounting collective substrate 11 having external terminals lc (see FIG. 2).
- this step for example, several hundreds of thousands of SAW elements 2 each having a force depending on the chip size of the SAW elements 2 are mounted on a mounting board 11 of 10 cm ⁇ 10 cm in a grid pattern.
- the distance between the mounted SAW elements 2 adjacent to each other is set to 300 ⁇ m in a narrow area and about 800 m in a wide area. This interval can be changed as needed.
- the resin film 12 is arranged on each SAW element 2 mounted on the mounting collective board 11.
- the thickness of the resin film 12 is set to 250 m in the present embodiment.
- the mounting assembly substrate 11, each of the mounted SAW elements 2 and the resin film 12 are put into a bag 13 for vacuum packing, and the inside of the bag 13 is reduced in pressure, for example, to 500 Pa. After that, degas and seal with heat seal.
- the shape of the bag 13 may be a substantially rectangular bag having an opening at one end, and the thickness of the bag 13 is about 80 m.
- the bag 13 may be any bag that has at least flexibility, gas nobility, and heat sealability and can accommodate the mounted assembly board 11 and the like.
- gas barrier properties gas barrier properties
- heat resistance The outer layer is made of a polyester film that excels in heat-sealing and curing temperatures, for example, heat resistance of about 180 ° C to 250 ° C, and the inner layer is a heat-sealing polyethylene film (sealant layer). Having a multilayer structure.
- the temperature of the heat-sealing heater 15 described later for heat sealing is set at about 150 ° C. to about 200 ° C. in the present embodiment, as long as the temperature does not exceed the melting temperature of the inner layer. It has been. It should be noted that instead of the above heat sealing property, a material that can maintain the sealing, that is, the sealing property, may be used by fastening with a clip or the like.
- an aluminum layer may be provided as an intermediate layer for improving gas barrier properties.
- Other examples of the material for the outer layer include polyimide-polyamide having excellent heat resistance.
- Another example of the material for the inner layer is a propylene-based material having heat sealability.
- the package 13 containing the mounting collective substrate 11, the respective SAW elements 2, and the resin film 12 is placed on the mounting table 14 in the sealed container 10.
- the inside of the bag 13 is evacuated so that the inside of the closed container 10 is evacuated (500 Pa or less) by a vacuum pump, and the vicinity of the opening of the bag 13 is heat-sealed from both sides with a heater (heat sealer) 15.
- the opening is closed by fusing.
- the above-mentioned vacuum state (under reduced pressure) may be a pressure lower than the pressure applied under pressure or under reduced pressure in the curing step described later, but is preferably 500 Pa or less.
- a method of airtightly inserting a metal pipe connected to a vacuum pump into the opening of the bag 13 and degassing the inside of the bag 13 can be mentioned.
- the portions of the openings facing each other are also in close contact with each other, and while the metal pipe is being pulled out in this state, the vicinity of the openings is fused by a heat sealing heater (heat sealer) 15. Let's close the opening.
- the sealing step includes an infiltration step and a curing step.
- the resin film 12 is heated together with the bag 13; for example, less than the curing temperature of the resin film 12, and in this embodiment, less than 150 ° C., 100 ° C. C Soften by heating to 140 ° C.
- the softened resin film 12 is pressed between the SAW elements 2 mounted on the mounting collective substrate 11 vacuum-packed by the bag 13 due to the pressure difference between the inside and the outside of the bag 13. By invading. As a result, each SAW element 2 is covered and sealed by the sealing resin precursor 4a from the resin film 12.
- the top surface of the resin film 12 is kept substantially parallel to the mounting collective substrate 11 by the tension of the bag 13 and becomes substantially flat when the infiltration is completed.
- the curing temperature of the sealing resin precursor 4a from each of the SAW elements 2, the mounting collective substrate 11, and the resin film 12 is increased to 150 ° C. in the present embodiment. It is heated to cure the sealing resin precursor 4a. As a result, as shown in FIG. 1 (d), a sealing resin portion 4 covering each SAW element 2 is formed.
- the mounting assembly substrate 11, each SAW element 2, and the sealing resin precursor 4 a vacuum-packed by the bag 13 are combined with the internal space 16 a of the sealed container 16. Placed inside.
- a pressure to the bag 13 by the pressure medium 17 pressure-controlled by the pressure control unit 18 in the internal space 16a because uniform pressure can be applied.
- the pressure medium include air, water, and oil.
- the pressure control may be performed by any method as long as an appropriate pressure can be applied to the bag 13 under vacuum.
- the pressure adjustment may be pressurization at a higher pressure or atmospheric pressure at a lower pressure than the atmospheric pressure.
- the space between the SAW element 2 and the mounting collective substrate 11 is formed by using high-viscosity resin. If it is desired that the sealing resin part 4 also penetrates, the pressure applied to the sealing resin precursor 4a via the bag 13 may be controlled by adjusting the surrounding pressure during curing. Since such pressure control can be performed, the allowable range for the property and shape of the sealing resin portion 4 is widened. The shape and dimensions of the space 5 are easy to manage.
- the sealing resin portion 4 cured in such a curing step a concave portion of about several meters is formed at a boundary portion between the SAW elements 2 adjacent to each other.
- the recess does not particularly hinder the cutting in the dividing step described later.
- the occurrence of the recess In order to avoid this, the thickness of the resin film 12 to be used should be increased.
- each SAW element 2 resin-sealed by the sealing resin part 4 is taken out of the bag 13 and, as shown in FIG.
- Each element 2 is divided along the virtual dividing line 9 by an appropriate method such as a dicing method or a cut-break.
- the mounting aggregate substrate 11 on which each SAW element 2 is mounted and the resin film 12 are overlapped with each other, and these are vacuum-packed with the bag 13. Then, each SAW element 2 is sealed, and then the soft resin film 12 is cured. As a result, the air inside the bag 13 is exhausted, so that a laminate type CSP type SAW device that does not generate voids can be obtained.
- the only devices used are a simple vacuum packing machine and a small heating furnace. Therefore, while avoiding the generation of voids, SAW devices of several hundreds and thousands can be collectively and inexpensively manufactured using one mounting collective board 11.
- the resin film 12 When a resin having a small filler particle diameter and a low elasticity is used as the resin film 12, the resin also penetrates into the gap between the SAW element 2 and the mounting collective substrate 11. be able to
- a gap between the mounting collective board 11 and the SAW element 2 is required. It is preferable to use a resin film 12 having a larger maximum filler particle size and a high elasticity when softening. Thereby, the space portion 5 can be reliably formed between the mounting collective substrate 11 and the SAW element 2. Also, by appropriately setting the thickness of the resin film 12 to be used, the product thickness of the obtained SAW device can be controlled.
- the productivity can be improved and the sealing can be performed at low cost with a simple vacuum device and a simple construction method, and the entire surface of the bag 13 can be uniformly pressed using the atmospheric pressure. Therefore, according to the above-described manufacturing method, it is less susceptible to the thickness variation of the mounting collective substrate 11 and the SAW element 2 as compared with the mouth opening method and the pressing method.
- the entire SAW element 2 can be covered with the sealing resin portion 4, and a sufficient sealing width can be obtained. Therefore, as compared with the case where a thin film is used, in the above-described manufacturing method, the sealing property can be improved, and the surface area of the mounting substrate 1 and the surface area of the top surface of the sealing resin portion 4 can be made substantially equal to each other. Therefore, it is easy to secure the mountability of the obtained SAW device.
- the release sheet 19 may be attached to one entire surface of the resin film 12, that is, the entire outer surface.
- the release sheet 19 is made of a material having heat resistance equal to or higher than that of the outer layer of the bag 13 and having a low affinity for the inner layer of the bag 13 and the sealing resin 4, that is, low adhesiveness. Anything should do.
- PET polyethylene terephthalate
- the like can be mentioned.
- the release sheet 19 is peeled off. Accordingly, it is possible to prevent adhesion of dirt such as dust on the surface of the sealing resin portion 4 during the curing process and to prevent the occurrence of irregularities, and to prevent the inner layer of the bag 13 from sealing even when heated at the curing temperature. It is possible to prevent the oil portion 4 from adhering to each other. Therefore, the manufacturing process can be simplified.
- the surface roughness of the release film 19 on the resin film 12 side is transferred to the surface of the sealing resin portion 4 from the resin film 12, and the surface of the sealing resin portion 4 in a good surface state is formed. Since the top surface of the package is obtained, good laser printing without performing pre-processing can be performed on the top surface of the package.
- the relationship between the surface roughness (m) of the package top surface of the sealing resin part 4 and the recognition rate (%) in laser printing was examined by changing the surface roughness in various ways.
- the results shown in Fig. 6 were obtained.
- the surface roughness is a value measured using a non-contact three-dimensional surface roughness meter. From this result, the surface roughness of the release film 19 on the resin film 12 side was 0.01 m to 10 m. It can be seen that the range is preferred.
- electronic components such as the SAW element 2 and the semiconductor element 22 may be face-down bonded onto the mounting substrate 1 or the package, and the periphery may be sealed with a sealing resin part.
- the printing may not be clear due to unevenness or dirt on the surface of the sealing resin part 4.
- a countermeasure a method has been used in which a resin for printing having further coloring properties is applied onto a sealing resin portion and then laser printing is performed. As a result, there is a problem that the number of processes is increased and the cost is increased.
- each SAW element 2 face-down bonded on the mounting collective substrate 11 is covered with a resin film 12, and a release sheet 19 is further placed on the resin film 12. Then, the resin film 12 may be softened and cured. Thereby, it is possible to prevent irregularities and dirt on the surface (top surface) of the sealing resin portion 4 from the resin film 12 which occurs during curing.
- the force using the example of the SAW element is not limited to the above.
- the SAW element 2 for example, as shown in FIG. May be used.
- the space 5 shown in FIG. 2 does not need to be secured, so that the space 5 may be filled with the sealing resin portion 4 as an underfill material.
- heating / pressing rollers 26, 26 may be used. That is, the resin film 12 is placed on each SAW element 2 mounted on the mounting substrate 11 via the protruding electrodes 3, and the resin film 12 is placed on the flat plate 24, The bag 13 is transported together with the flat plate 24 between the two heating / pressing rollers 26, 26 to perform an infiltration step.
- the pressure may be applied by fitting the bag 13 into the press frame 28c of the press machine 28.
- the bag 13 containing the mounting assembly board 11, the respective SAW elements 2 and the resin film 12 is placed on the lower table 28b of the press machine 28,
- the resin film 12 is buried by pressing the resin film 12 from above by lowering the upper press 28a with a jig such as a press frame 28c attached to the lower surface of the upper press 28a.
- a bag 13 as an adhesive film is formed around the mount collective substrate 11. Spacers may be placed to form air gaps and provide air holes (air passages)
- An air hole may be provided in a part of the mounting collective substrate 11 side or in a part of the heat-softened adhesive resin film 12.
- the air hole may be opened somewhere in the space formed between the resin film 12 and the mounting collective substrate 11 in order to ensure the adhesion by the atmospheric pressure after the vacuum packing process.
- the inside of the bag 13 may be further degassed after being replaced with an inert gas such as dry nitrogen.
- an inert gas such as dry nitrogen.
- heat fusion is preferred, but any method can be used as long as it can block the surrounding air, such as pressure bonding with an adhesive device.
- the degree of vacuum at the time of evacuation is adjusted so as to minimize the amount of penetration of the sealing resin portion 4, and an appropriate residual amount is formed. Sealing may be performed with care.
- the degree of vacuum at this time varies depending on the volume of the space 5 to be formed and the shape of the product, but lOOPa—500Pa is preferred! / ⁇ .
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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DE112004002236T DE112004002236B4 (de) | 2004-01-22 | 2004-12-07 | Herstellungsverfahren einer elektronischen Komponente |
JP2005517197A JP4386039B2 (ja) | 2004-01-22 | 2004-12-07 | 電子部品の製造方法 |
US10/595,988 US7752747B2 (en) | 2004-01-22 | 2004-12-07 | Manufacturing method of electronic component |
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JP2004014492 | 2004-01-22 | ||
JP2004-014492 | 2004-01-22 |
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WO2005071731A1 true WO2005071731A1 (ja) | 2005-08-04 |
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PCT/JP2004/018211 WO2005071731A1 (ja) | 2004-01-22 | 2004-12-07 | 電子部品の製造方法 |
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US (1) | US7752747B2 (ja) |
JP (1) | JP4386039B2 (ja) |
KR (1) | KR100782280B1 (ja) |
CN (1) | CN100390949C (ja) |
DE (1) | DE112004002236B4 (ja) |
TW (1) | TWI263403B (ja) |
WO (1) | WO2005071731A1 (ja) |
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JP2009010942A (ja) * | 2007-05-29 | 2009-01-15 | Nippon Dempa Kogyo Co Ltd | 圧電部品及びその製造方法 |
JP2009021559A (ja) * | 2007-06-12 | 2009-01-29 | Nippon Dempa Kogyo Co Ltd | 電子部品及びその製造方法 |
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DE102009017763A1 (de) | 2008-04-16 | 2009-11-05 | Murata Manufacturing Co. Ltd., Nagaokakyo-shi | Verfahren und Vorrichtung zum Herstellen einer elektronischen Komponente |
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JP2014192446A (ja) * | 2013-03-28 | 2014-10-06 | Toray Ind Inc | 電子部材の製造方法 |
WO2015015982A1 (ja) * | 2013-08-01 | 2015-02-05 | 日東電工株式会社 | 封止用シート、及び、当該封止用シートを用いた半導体装置の製造方法 |
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Also Published As
Publication number | Publication date |
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KR100782280B1 (ko) | 2007-12-04 |
JPWO2005071731A1 (ja) | 2007-07-26 |
CN100390949C (zh) | 2008-05-28 |
CN1883043A (zh) | 2006-12-20 |
TWI263403B (en) | 2006-10-01 |
KR20060117957A (ko) | 2006-11-17 |
US7752747B2 (en) | 2010-07-13 |
DE112004002236B4 (de) | 2011-12-15 |
TW200525883A (en) | 2005-08-01 |
DE112004002236T5 (de) | 2007-10-25 |
JP4386039B2 (ja) | 2009-12-16 |
US20080313895A1 (en) | 2008-12-25 |
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