WO2018043129A1 - 回路モジュールおよびその製造方法 - Google Patents
回路モジュールおよびその製造方法 Download PDFInfo
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- WO2018043129A1 WO2018043129A1 PCT/JP2017/029439 JP2017029439W WO2018043129A1 WO 2018043129 A1 WO2018043129 A1 WO 2018043129A1 JP 2017029439 W JP2017029439 W JP 2017029439W WO 2018043129 A1 WO2018043129 A1 WO 2018043129A1
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- Prior art keywords
- connection electrode
- circuit module
- connection
- sealing member
- substrate
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Definitions
- the present invention relates to a circuit module and a manufacturing method thereof, and more particularly to a circuit module in which a flat substrate and a frame substrate are connected and a manufacturing method thereof.
- FIG. 17 is a cross-sectional view of the circuit module 200 described in Patent Document 1.
- the circuit module 200 includes a flat substrate 210, a frame substrate 220, and electronic components 217 and 218.
- the terminal electrode 229 of the frame substrate 220 is connected to a connection electrode 214 provided on one main surface (lower surface in the drawing) side of the flat substrate 210.
- the electronic component 218 is connected to the other main surface (upper surface in the drawing) side of the flat substrate 210.
- the electronic component 217 is disposed in a cavity constituted by one main surface of the flat substrate 210 and the inner surface of the frame substrate 220 and is sealed with a sealing member 230.
- the sealing member 230 is filled in the cavity. Since the electronic component 217 is sealed by the sealing member 230, adhesion of solder balls and flux residues to the electronic component 217 is suppressed when the circuit module 200 is reflow-connected to the circuit board. That is, short circuit failure of the circuit module 200 after connection to the circuit board can be suppressed, and long-term reliability can be improved.
- the sealing member 230 since the sealing member 230 is filled in the cavity after the flat substrate 210 and the frame substrate 220 are connected, the sealing member 230 always contacts the inner surface of the frame substrate 220. It will be. Generally, a liquid sealing member shrinks in volume when solidified. Therefore, in the manufacturing process of the circuit module 200, when the liquid sealing member 230 is solidified, the inner side surface of the frame-shaped substrate 220 is pulled inward by contraction of the sealing member 230. That is, a shear stress is generated between the flat substrate 210 and the frame substrate 220. As a result, the connection member between the connection electrode 214 of the flat substrate 210 and the terminal electrode 229 of the frame substrate 220 may be broken.
- the thermal expansion coefficient of the frame-shaped substrate 220 and the thermal expansion coefficient of the sealing member 230 are different in a state where the frame-shaped substrate 220 and the sealing member 230 are in contact with each other.
- the thermal expansion coefficient of the sealing member 230 is larger
- the circuit module 200 is reflow-connected to the circuit board of the electronic device
- the inner surface of the frame-like substrate 220 is expanded due to the volume expansion of the sealing member 230. It is pushed outward.
- a shear stress opposite to the above occurs between the flat substrate 210 and the frame substrate 220.
- the connection member between the connection electrode 214 of the flat substrate 210 and the terminal electrode 229 of the frame substrate 220 may be broken as described above.
- an object of the present invention is to provide a circuit module having a high connection reliability between a flat substrate and a frame substrate, and a manufacturing method thereof.
- the shape and the forming method of the sealing member are improved.
- the present invention is first directed to a circuit module.
- the circuit module according to the present invention includes a flat substrate, a frame substrate, a first electronic component, and a first sealing member having the following characteristics.
- a plurality of first connection electrodes are arranged on the peripheral edge of the one main surface of the flat substrate.
- a plurality of second connection electrodes are arranged at positions corresponding to the first connection electrodes on one main surface of the frame-shaped substrate.
- the first connection electrode and the second connection electrode are connected via a first connection member.
- the first electronic component is sealed with a first sealing member.
- the first electronic component and the first sealing member are disposed in a cavity including one main surface of the flat substrate and the inner surface of the frame substrate.
- the first sealing member is isolated from the inner side surface of the frame-shaped substrate.
- the frame-shaped substrate and the first sealing member are not in contact. Therefore, when the first sealing member is cured and when the circuit module is reflow-connected to the circuit board of the electronic device, no shear stress is generated between the flat plate-like substrate and the frame-like substrate. Therefore, the first connection member between the flat substrate and the frame substrate is not broken, and the electrical and mechanical connection reliability between the flat substrate and the frame substrate is high.
- the circuit module according to the present invention preferably has the following features. That is, the first sealing member contains a photocurable resin material.
- the shape of the first sealing member is separated from the inner surface of the frame-shaped substrate with high accuracy according to the accuracy of the mask pattern for exposure. ing.
- the circuit module according to the present invention and its preferred form preferably have the following features. That is, the first connection member includes a metal material having a melting point of 900 ° C. or higher.
- the melting point of the first connecting member is sufficiently higher than the reflow temperature when the circuit module is connected to the circuit board of the electronic device. Therefore, the first connecting member does not remelt during reflow, and the breaking strength of the first connecting member is high, so that the electrical and mechanical connection reliability between the flat substrate and the frame substrate is high. It is high.
- the circuit module according to the present invention and its preferred form have the following characteristics. That is, the first connection member includes an anisotropic conductive resin material, and seals the first connection electrode and the second connection electrode.
- the first connection member is disposed so as to seal the first connection electrode and the second connection electrode, whereby one main surface of the flat substrate. And also functions as an underfill between the main surface of the frame substrate. That is, the first connection member not only electrically connects the first connection electrode and the second connection electrode but also mechanically connects the flat substrate and the frame substrate. . Therefore, the electrical and mechanical connection reliability between the flat substrate and the frame substrate is further increased.
- the circuit module according to the present invention and its preferred form have the following characteristics. That is, the first connection member includes a metal material containing Sn, and the first connection electrode, the second connection electrode, and the first connection member are sealed with an insulating resin member. .
- the first connection member containing a metal material containing Sn is responsible for the electrical connection between the first connection electrode and the second connection electrode.
- the metal material containing Sn include a Sn—Ag—Cu-based Pb-free solder material.
- the insulating resin member is disposed so as to seal the first connection electrode, the second connection electrode, and the first connection member, so that one main surface of the flat substrate and one of the frame substrates are arranged. It functions as an underfill between the main surfaces. Therefore, the electrical and mechanical connection reliability between the flat substrate and the frame substrate is further increased.
- the circuit module according to the present invention its preferred form, and further preferred form have the following characteristics. That is, the metal film is disposed on the surface of the first sealing member on the side facing the surface on the one main surface side of the flat substrate.
- the metal film is also connected to the circuit board of the electronic device. Connected with electrodes. That is, the number of connection points between the circuit module and the circuit board of the electronic device increases. Therefore, mechanical connection reliability is high.
- heat generated from the first electronic component during operation of the circuit module can be efficiently released to the circuit board of the electronic device through the metal film. That is, damage due to self-heating of the first electronic component is suppressed. Therefore, the lifetime reliability of the circuit module is increased.
- the present invention is also directed to a method for manufacturing a circuit module.
- a method for manufacturing a circuit module according to the present invention is for manufacturing a circuit module including a flat substrate, a frame substrate, a first electronic component, and a first sealing member.
- the circuit module has the following features.
- a plurality of first connection electrodes are arranged on the peripheral edge of the one main surface of the flat substrate.
- a plurality of second connection electrodes are arranged at positions corresponding to the first connection electrodes on one main surface of the frame-shaped substrate.
- the first connection electrode and the second connection electrode are connected via a first connection member.
- the first electronic component is sealed with a first sealing member.
- the circuit module manufacturing method according to the present invention includes the following four steps.
- the first step is a step of preparing a flat substrate and a frame substrate.
- the second step is a step of connecting the first electronic component on one main surface of the flat substrate.
- the third step is a step of forming the first sealing member on one main surface of the flat substrate.
- the first sealing member having a predetermined shape is formed first. Thereafter, the first connection electrode and the second connection electrode are connected via the first connection member. Therefore, the first sealing member can be reliably isolated from the inner surface of the frame-like substrate, and the connection reliability between the flat plate-like substrate and the frame-like substrate can be increased.
- the method for manufacturing a circuit module according to the present invention preferably has the following features. That is, the first sealing member contains a photocurable resin material.
- the third process includes the following two sub-processes.
- the first sub-process is a process of placing the photocurable precursor of the first sealing member on the one main surface.
- the second sub-process is a process in which the photocurable precursor of the first sealing member is exposed to form a first sealing member having a predetermined shape.
- the first sealing member can be cured without heating or by heating at a low temperature. Therefore, thermal damage to the first electronic component sealed by the first sealing member can be suppressed.
- the shape of the first sealing member is separated from the inner surface of the frame-shaped substrate with high accuracy according to the accuracy of the mask pattern for exposure. It can also be made.
- the method for manufacturing a circuit module according to the present invention preferably includes the following features. That is, the first sealing member includes a thermosetting resin material.
- the third step includes the following five substeps.
- the first sub-process is a process of placing a photocurable precursor of a resist member on one main surface.
- the second sub-process is a process of exposing the photocurable precursor of the resist member to a resist member having a shape that is a negative pattern having a predetermined shape.
- the third sub-process is a process of disposing the thermosetting precursor of the first sealing member on the one main surface provided with the resist member.
- the fourth sub-process is a process for heating the thermosetting precursor of the first sealing member to obtain a first sealing member having a predetermined shape.
- the fifth sub-process is a process of peeling the resist member from the one main surface.
- thermosetting resin material can be used as the first sealing member. Therefore, the manufacturing cost of the circuit module can be kept low.
- the method for manufacturing a circuit module according to the present invention and a preferable mode thereof have the following characteristics. That is, the third step further includes a sub-step of disposing a metal film on the surface of the first sealing member on the side facing the one main surface side of the flat substrate.
- a circuit module having many mechanical connection reliability with a large number of connection points with a circuit board of an electronic device can be manufactured.
- the method for manufacturing a circuit module according to the present invention and a preferable mode thereof have the following characteristics. That is, the fourth process includes the following three sub-processes.
- the first sub-process is a process of disposing a metal material paste containing metal material nanoparticles having a melting point of 900 ° C. or higher on at least one of the first connection electrode and the second connection electrode.
- the second sub-process is a process in which the first connection electrode and the second connection electrode are opposed to each other through a metal material paste.
- the metal material paste is heated and sintered to include a metal material having a melting point of 900 ° C. or higher and to electrically connect the first connection electrode and the second connection electrode. This is a step of forming a first connecting member.
- the first connection electrode and the second connection electrode are formed using a metal material paste containing nanoparticles of a metal material having a melting point of 900 ° C. or higher. Are electrically connected.
- the metal material paste include an Ag (melting point: about 962 ° C.) nanoparticle paste, but are not limited thereto.
- the above metal material paste has a sintering temperature of about 180 ° C., which is lower by 50 ° C. or more than a solder paste usually used for various connections. Therefore, in the method for manufacturing a circuit module having the above steps, thermal damage to the first electronic component can be suppressed.
- the melting point of the first connection member after sintering is 900 ° C. or higher, when the reflow connection is made between the circuit module and the circuit board of the electronic device using the solder paste, the first connection member is Melting does not occur. Therefore, in the method for manufacturing a circuit module having the above steps, the electrical and mechanical connection reliability between the flat substrate and the frame substrate can be increased.
- the method for manufacturing a circuit module according to the present invention and a preferable mode thereof preferably include the following features. That is, the fourth process includes the following three sub-processes.
- the first sub-process is a process of disposing a liquid resin containing an uncured anisotropic conductive resin material on at least one of the first connection electrode and the second connection electrode.
- the first connection electrode and the second connection electrode are opposed to each other through the liquid resin, and the first connection electrode and the second connection electrode are relatively close to each other.
- This is a step of pressurizing the liquid resin between the first connection electrode and the second connection electrode, and further embedding the first connection electrode and the second connection electrode in the liquid resin.
- the liquid resin is heated and cured to electrically connect the first connection electrode and the second connection electrode, and the first connection electrode and the second connection electrode. Is a step of forming a first connection member.
- a liquid resin containing an uncured anisotropic conductive resin material is formed in a region between the first connection electrode and the second connection electrode.
- Conductivity can be obtained by applying pressure.
- insulation can be obtained in a region surrounding the first connection electrode and the second connection electrode to which no pressure is applied. That is, in the method for manufacturing a circuit module having the above-described steps, a region electrically connected to the first connection electrode and the second connection electrode and a region functioning as an underfill are formed with one liquid resin. Can be formed.
- a circuit module having high electrical and mechanical connection reliability between the flat substrate and the frame substrate can be manufactured easily and at low cost. can do.
- the method for manufacturing a circuit module according to the present invention and a preferable mode thereof preferably include the following features. That is, the fourth process includes the following three sub-processes.
- a metal material bump including a metal material containing Sn is disposed on one of the first connection electrode and the second connection electrode, and an uncured insulating resin material is included.
- the metal material bump is brought into contact with the other of the first connection electrode and the second connection electrode in which the liquid resin is disposed, and the first connection electrode and the second connection electrode In this step, the metal material bump is embedded in the liquid resin.
- the third sub-process applies ultrasonic vibration to the metal material bump to form a first connection member that electrically connects the first connection electrode and the second connection electrode, and heats the liquid resin.
- This is a step of forming an insulating resin member that seals the first connection electrode, the second connection electrode, and the first connection member by curing.
- the first connecting member is not heated. Therefore, thermal damage to the first electronic component can be suppressed. Further, the first connection electrode, the second connection electrode, and the first connection member are embedded in the insulating resin member, and the insulating resin member functions as an underfill. Therefore, in the method for manufacturing a circuit module having the above steps, a circuit module with high mechanical connection reliability between the flat substrate and the frame substrate can be manufactured.
- connection member between the flat substrate and the frame substrate is not broken, and the connection reliability between the flat substrate and the frame substrate is high.
- the first sealing member can be reliably separated from the inner surface of the frame-shaped substrate. Connection reliability can be increased.
- FIG. 1 is an external perspective view of a circuit module 100 which is a first embodiment of a circuit module according to the present invention. It is the external view which looked at the circuit module 100 from the arrow direction shown in FIG. 3 is a cross-sectional view of the circuit module 100 taken along the line III-III shown in FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents typically the preparation or preparation process (1st process) of the flat board
- FIG. 1 It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing showing the formation process of the 2nd sealing member 40 typically. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing showing the formation process of the 2nd sealing member 40 typically. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents typically the connection process (2nd process) of the 1st electronic component 17.
- FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents typically the formation process (3rd process) of the 1st sealing member 30.
- FIG. 100 It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents typically the formation process (3rd process) of the 1st sealing member 30.
- FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents typically the formation process (3rd process) of the 1st sealing member 30.
- FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents typically the connection process (4th process) of the frame-shaped board
- FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100, and is sectional drawing which represents the completed circuit module 100 typically.
- FIG. 1 It is a figure for demonstrating another example of the manufacturing method of the circuit module 100, and is sectional drawing which represents the completed circuit module 100 typically. It is sectional drawing of circuit module 100A which is 2nd Embodiment of the circuit module which concerns on this invention. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100A, and is sectional drawing which represents typically the connection process (2nd process) of the 1st electronic component 17. FIG. It is a figure for demonstrating an example of the manufacturing method of 100 A of circuit modules, and is sectional drawing which represents typically a part of formation process (3rd process) of the 1st sealing member 30. FIG.
- FIG. 1 It is a figure for demonstrating an example of the manufacturing method of 100 A of circuit modules, and is sectional drawing which represents typically a part of formation process (3rd process) of the 1st sealing member 30.
- FIG. It is a figure for demonstrating an example of the manufacturing method of 100 A of circuit modules, and is sectional drawing which represents typically a part of formation process (3rd process) of the 1st sealing member 30.
- FIG. It is a figure for demonstrating an example of the manufacturing method of 100 A of circuit modules, and is sectional drawing which represents typically another part of the formation process (3rd process) of the 1st sealing member 30.
- FIG. 100A It is a figure for demonstrating an example of the manufacturing method of 100 A of circuit modules, and is sectional drawing which represents typically another part of the formation process (3rd process) of the 1st sealing member 30.
- FIG. It is a figure for demonstrating an example of the manufacturing method of 100 A of circuit modules, and is sectional drawing which represents typically another part of the formation process (3rd process) of the 1st sealing member 30.
- FIG. It is sectional drawing of the circuit module 100B which is 3rd Embodiment of the circuit module which concerns on this invention. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100B, and is sectional drawing which represents typically the connection process (4th process) of the frame-shaped board
- FIG. 100B It is a figure for demonstrating an example of the manufacturing method of the circuit module 100B, and is sectional drawing which represents typically the connection process (4th process) of the frame-shaped board
- FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100B, and is sectional drawing which represents typically the connection process (4th process) of the frame-shaped board
- FIG. It is a figure for demonstrating an example of the manufacturing method of the circuit module 100B, and is sectional drawing which represents the completed circuit module 100B typically. It is sectional drawing of the circuit module 100C which is 4th Embodiment of the circuit module which concerns on this invention.
- FIG. 100C It is a figure for demonstrating an example of the manufacturing method of 100 C of circuit modules, and is sectional drawing which represents typically the connection process (4th process) of the frame-shaped board
- FIG. 100C It is a figure for demonstrating an example of the manufacturing method of 100 C of circuit modules, and is sectional drawing which represents typically the connection process (4th process) of the frame-shaped board
- FIG. 100C It is a figure for demonstrating an example of the manufacturing method of the circuit module 100C, and is sectional drawing showing typically the completed circuit module 100C.
- circuit module 100D which is 5th Embodiment of the circuit module which concerns on this invention. It is a figure for demonstrating an example of the manufacturing method of circuit module 100D, In the formation process (3rd process) of the 1st sealing member 30, the metal film 31 is arrange
- positioned on the surface of the 1st sealing member 30 In the formation process (3rd process) of the 1st sealing member 30, the metal film 31 is arrange
- FIG. It is sectional drawing of the circuit module 200 of background art.
- circuit module to which the present invention is applied include, but are not limited to, a hybrid IC used in a mobile communication device such as a mobile phone.
- circuit module 100 which is the first embodiment of the circuit module according to the present invention
- Each drawing is a schematic view and does not necessarily reflect the actual product dimensions. Further, variations in the shape of each component generated in the manufacturing process are not necessarily reflected in each drawing. That is, it can be said that the drawings used hereinafter represent the actual product in an essential aspect even if there are different parts from the actual product.
- FIG. 1 is an external perspective view of the circuit module 100.
- FIG. 2 is an external view (so-called bottom view) of the circuit module 100 viewed from the direction of the arrow shown in FIG. 3 is a cross-sectional view taken along the line III-III of the circuit module 100 shown in FIG.
- the circuit module 100 includes a flat substrate 10, a first electronic component 17, a second electronic component 18, a frame substrate 20, a first sealing member 30, and a second sealing member 40. It has.
- the flat substrate 10 includes an insulator layer 11, a pattern conductor 12, and a via conductor 13.
- the insulator layer 11 is made of, for example, a ceramic material that is a Ba—Al—Si-based oxide, or a composite material that includes a woven or nonwoven fabric such as glass or silica, and an insulating resin such as an epoxy resin. It comprises an insulator material selected from the inside.
- the pattern conductor 12 and the via conductor 13 include a metal material such as Cu.
- a plurality of first connection electrodes 14 are arranged on the peripheral portion of one main surface 10F (the lower surface side in FIG. 3) of the flat substrate 10.
- a plurality of third connection electrodes 15 are arranged in the vicinity of the central portion of the one main surface 10F of the flat substrate 10.
- a first electronic component 17 is connected to the third connection electrode 15 via a second connection member J2. The first electronic component 17 is sealed inside a first sealing member 30 formed on the one main surface 10F of the flat substrate 10.
- the first connection electrode 14 and the third connection electrode 15 include a metal material such as Cu.
- the first electronic component 17 is selected as necessary from passive components such as capacitors and active components such as ICs.
- the first sealing member 30 includes an insulating photocurable resin material described later. By using the photocurable resin material, the shape of the first sealing member 30 is controlled with high accuracy.
- fine particles of glass material, fine particles of Si oxide, or the like may be dispersed as a filler.
- a Sn—Ag—Cu Pb-free solder material or the like is used for example.
- a plurality of fourth connection electrodes 16 are arranged in the vicinity of the center of the other main surface 10S (upper surface side in FIG. 3) of the flat substrate 10.
- a second electronic component 18 is connected to the fourth connection electrode 16 via a third connection member J3.
- the second electronic component 18 is sealed inside a second sealing member 40 formed on the other main surface 10S of the flat substrate 10.
- the fourth connection electrode 16 includes a metal material such as Cu. Similarly to the first electronic component 17, the second electronic component 18 is selected from various electronic components as necessary.
- the second sealing member 40 includes an insulating thermosetting resin material. Note that the second sealing member 40 may include an insulating photocurable resin material. In the second sealing member 40, for example, fine particles of glass material or fine particles of Si oxide may be dispersed as a filler.
- the third connecting member J3 is made of the same solder material as the second connecting member J2.
- the same solder material may be used for the 2nd connection member J2 and the 3rd connection member J3, and a different solder material may be used.
- the frame-like substrate 20 includes an insulator layer 21 and via conductors 23.
- the insulator layer 21 includes the same insulator material as that of the insulator layer 11 of the flat substrate 10.
- the via conductor 23 includes a metal material such as Cu.
- the frame-shaped substrate 20 has a single window frame shape connected in a ring shape, but may be a combination of, for example, two L-shaped substrates, or two square C-shapes. A combination of shaped substrates may be used.
- a plurality of second connection electrodes 24 are arranged at positions corresponding to the first connection electrodes 14 on one main surface 20F (upper surface side in FIG. 3) of the frame-shaped substrate 20.
- a plurality of fifth connection electrodes 29 are arranged on the other main surface 20 ⁇ / b> S (the lower surface side in FIG. 3) of the frame substrate 20.
- the fifth connection electrode 29 serves as a connection electrode with an input / output electrode and a ground electrode of a circuit board (not shown) of the electronic device.
- the second connection electrode 24 and the fifth connection electrode 29 comprise a metal material such as Cu.
- the first connection electrode 14 and the second connection electrode 24 are connected via the first connection member J1.
- the first electronic component 17 and the first sealing member 30 are disposed in a cavity C configured to include the one main surface 10F of the flat substrate 10 and the inner surface 20I of the frame substrate 20.
- the first sealing member 30 is isolated from the inner side surface 20I of the frame-shaped substrate 20.
- the first connecting member J1 includes, for example, a metal material having a melting point of 900 ° C. or higher, which is a sintered body of Ag nanoparticle paste. Such a first connection member J1 does not remelt during reflow and has a high breaking strength, so that the electrical and mechanical connection reliability between the flat substrate 10 and the frame substrate 20 is high. It has become.
- the problem to be solved by the invention is between the flat substrate 10 and the frame substrate 20 when the first sealing member 30 is cured and when the reflow connection of the circuit module 100 to the circuit substrate of the electronic device is performed. Shear stress due to the action described in the item does not occur. Therefore, the first connection member J1 between the flat substrate 10 and the frame substrate 20 is not broken, and the electrical and mechanical connection reliability between the flat substrate 10 and the frame substrate 20 is high. It has become.
- FIGS. 4A to 6B are cross-sectional views schematically showing the main part of each step sequentially performed in an example of the method for manufacturing the circuit module 100.
- FIGS. 4A to 6B corresponds to a cross-sectional view (see FIG. 3) of the circuit module 100 in FIG. 2 (see FIG. 3) (the same applies to the following cross-sectional views).
- FIG. 4A is a cross-sectional view schematically showing a production process or a preparation process (first process) of the flat substrate 10 and the frame substrate 20.
- the flat substrate 10 and the frame substrate 20 having a desired shape and configuration are produced.
- it may be prepared by diverting it.
- the description of the structure of the flat substrate 10 and the frame substrate 20 has already been made in the item of the structure of the circuit module 100, and is omitted here.
- FIG. 4B is a cross-sectional view schematically showing the connection process of the second electronic component 18.
- the second electronic component 18 is connected to the fourth connection electrode 16 disposed on the other main surface 10S (the upper surface side in FIG. 4B) of the flat substrate 10 via the third connection member J3. Is done.
- this process is not implemented when the 2nd electronic component 18 is unnecessary.
- FIG. 4C and FIG. 4D are cross-sectional views schematically showing the formation process of the second sealing member 40.
- the second electronic component 18 connected to the fourth connection electrode 16 is sealed by the second sealing member 40. Note that this step is not performed when the second electronic component 18 is not connected to the flat substrate 10. Even if the second electronic component 18 is connected to the flat substrate 10, this step may not be performed.
- FIG. 4C shows a state in which the precursor 40p of the second sealing member 40 is arranged on the other main surface 10S of the flat substrate 10 so that the second electronic component 18 is embedded therein.
- the precursor 40p may be either photocuring or thermosetting, and the curability is not particularly limited.
- FIG. 4D shows a state in which the precursor 40p is cured by light exposure or heating having a predetermined wavelength to become the second sealing member 40 that seals the second electronic component 18.
- FIG. 5A is a cross-sectional view schematically showing a connection process (second process) of the first electronic component 17.
- the third connection disposed on the one main surface 10F (upper surface side in FIG. 5A) of the flat substrate 10 is turned upside down on the flat substrate 10 on which the second sealing member 40 is formed.
- the first electronic component 17 is connected to the electrode 15 via the second connection member J2.
- 5B to 5D are cross-sectional views schematically showing the process of forming the first sealing member 30.
- the first electronic component 17 connected to the third connection electrode 15 is sealed by the first sealing member 30.
- FIG. 5B shows a sub-process in which the photocurable precursor 30p of the first sealing member 30 is arranged on the one main surface 10F of the flat substrate 10 so that the first electronic component 17 is embedded therein.
- FIG. 5C and FIG. 5D represent a sub-process in which the photocurable precursor 30p of the first sealing member 30 is exposed to form the first sealing member 30 having a predetermined shape.
- FIG. 5C shows that the peripheral region of the first electronic component 17 of the photocurable precursor 30p is exposed by light having a predetermined wavelength through a mask pattern (not shown) having a predetermined opening.
- the state which became the 1st sealing member 30 before hardening and was developed is represented.
- FIG. 5D shows development by removing the uncured photocurable precursor 30p, and the first sealing member 30 having a predetermined shape and sealing the first electronic component 17 is formed. Represents a state.
- the photocurable precursor 30p may be either a negative type (exposed portion remains after development) or a positive type (non-exposed portion remains after development).
- the first sealing member 30 having a predetermined shape is formed by selecting either a negative mask pattern or a positive mask pattern according to the curability of the photocurable precursor 30p.
- the predetermined shape is a state in which the first sealing member 30 is isolated from the inner side surface 20I of the frame-shaped substrate 20 when the frame-shaped substrate 20 is connected to the one main surface 10F of the flat substrate 10. The shape that becomes.
- FIG. 6A is a cross-sectional view schematically showing a connection step (fourth step) for the frame substrate 20.
- the first connection electrode 14 disposed on the peripheral portion of the one main surface 10F (upper surface side in FIG. 6A) of the flat substrate 10 and the one main surface 20F (lower surface in FIG. 6A) of the frame substrate 20 are disposed.
- the second connection electrode 24 arranged on the side) is connected via the first connection member J1.
- the first connecting member J1 is, for example, a sintered body of Ag nanoparticle paste. Thereby, a cavity C including the one main surface 10F of the flat substrate 10 and the inner surface 20I of the frame substrate 20 is formed.
- FIG. 6B is a cross-sectional view schematically showing a state in which the circuit module 100 is completed by inverting the top and bottom after the completion of each process described above.
- the first sealing member 30 that seals the first electronic component 17 is in a state of being isolated from the inner surface 20I of the frame-shaped substrate 20 in the cavity C.
- FIGS. 7A to 7E are cross-sectional views schematically showing the main part of each step sequentially performed in another example of the method for manufacturing the circuit module 100.
- ⁇ Second sealing member forming step> A description of the production or preparation process (first process) of the flat substrate 10M and the frame substrate 20 in the assembled state and the connection process of the second electronic component 18 is omitted.
- FIG. 7A is a cross-sectional view schematically showing a process of forming the second sealing member 40M using the flat plate-like substrate 10M in the assembled state. In this step, the second sealing member 40M is formed on the other main surface 10MS of the flat substrate 10M in the assembled state to which the second electronic component 18 is connected so as to seal the second electronic component 18.
- the method for forming the second sealing member 40M is the same as the forming step (FIGS. 4C and 4D) of the second sealing member 40 in the method for manufacturing the circuit module 100 described above. Further, the necessity of this step is the same as that in the method for manufacturing the circuit module 100 described above.
- FIG. 7B is a cross-sectional view schematically showing the formation process (third process) of the first sealing member 30.
- the plurality of first sealing members 30 are sealed on the one main surface 10MF of the assembled flat substrate 10M to which the first electronic components 17 are connected so as to seal the first electronic components 17. It is formed.
- the forming method of the first sealing member 30 is the same as the forming step (FIGS. 5B to 5D) of the first sealing member 30 in the method for manufacturing the circuit module 100 described above.
- FIG. 7C is a cross-sectional view schematically showing the connection step (fourth step) of the frame-shaped substrate 20.
- the plurality of frame-shaped substrates 20 are connected to the one main surface 10MF of the flat plate substrate 10M in the aggregated state, and the circuit module 100M in the aggregated state is manufactured.
- the method for connecting the frame-shaped substrate 20 to the flat plate-shaped substrate 10M in the assembled state is the same as the frame-shaped substrate connection step (FIG. 6A) in the method for manufacturing the circuit module 100 described above.
- FIG. 7D is a cross-sectional view schematically showing a process of dividing the circuit module 100M in the assembled state. In this step, the assembled circuit modules 100M manufactured by the steps described above are separated into individual circuit modules 100. The circuit module 100M in the assembled state is separated into pieces by a known method such as cutting with a dicing saw.
- FIG. 7E is a cross-sectional view schematically showing a state in which the circuit module 100 is completed by inverting the upper and lower sides after the completion of each process described above.
- circuit module 100A that is the second embodiment of the circuit module according to the present invention will be described with reference to FIG.
- the circuit module 100A differs from the circuit module 100 in the material and formation method of the first sealing member 30A. Since the other components are common to the circuit module 100, the description of the common components may be omitted.
- FIG. 8 is a cross-sectional view of the circuit module 100A.
- the circuit module 100 ⁇ / b> A includes a flat substrate 10, a first electronic component 17, a second electronic component 18, a frame substrate 20, a first sealing member 30 ⁇ / b> A, and a second sealing member 40. It has.
- the first sealing member 30A includes an insulating thermosetting resin material.
- Insulating thermosetting resin materials have many types as compared with photo-curing resin materials and are generally inexpensive, so that the circuit module 100A has a low manufacturing cost of the circuit module.
- fine particles of glass material, fine particles of Si oxide, or the like may be dispersed as a filler.
- FIGS. 9A to 10C are cross-sectional views schematically showing the main part of each step sequentially performed in an example of the method for manufacturing the circuit module 100A.
- FIG. 9A is a cross-sectional view schematically showing a connection step (second step) of the first electronic component 17.
- the first electronic component 17 is connected to the third connection electrode 15 disposed on the one main surface 10F (upper surface side in FIG. 9A) of the flat substrate 10 via the second connection member J2. Is done.
- FIG. 9B to FIG. 10C are cross-sectional views schematically showing the formation process (third process) of the first sealing member 30A.
- the first electronic component 17 connected to the third connection electrode 15 is sealed by the first sealing member 30A.
- FIG. 9B shows a sub-process of disposing the photocurable precursor 50p of the resist member 50 on the one main surface 10F of the flat substrate 10.
- the photocurable precursor 50p a known material can be used.
- FIG. 9C shows that the first electronic component 17 is exposed by exposing light having a predetermined wavelength through a mask pattern (not shown) having a predetermined opening and removing the uncured photocurable precursor 50p. This represents a sub-process in which the resist member 50 having the predetermined opening 50a is formed.
- the photocurable precursor 50p may be either a negative type or a positive type. Depending on the curability of the photocurable precursor 50p, either a negative mask pattern or a positive mask pattern is selected to form an opening having a predetermined shape.
- This predetermined shape means that when the first sealing member 30A formed by filling the opening 50a is connected to the one main surface 10F of the flat substrate 10, the frame substrate The shape which becomes the state isolated from the inner surface 20I of 20 is said.
- FIG. 9D shows a sub-process of disposing the thermosetting precursor 30Ap of the first sealing member 30A on the one main surface 10F of the flat substrate 10 provided with the resist member 50.
- the thermosetting precursor 30Ap is filled in the opening 50a.
- the thermosetting precursor 30 ⁇ / b> Ap is disposed so as to cover the resist member 50.
- the thermosetting precursor 30 ⁇ / b> Ap is disposed so as to be flush with the resist member 50.
- FIG. 10A and FIG. 10B represent a sub-process in which the thermosetting precursor 30Ap is heated to form a first sealing member 30A having a predetermined shape.
- FIG. 10A shows a state in which the thermosetting precursor 30Ap is cured by heating and becomes the first sealing member 30A.
- FIG. 10B shows a state where the thickness of the first sealing member 30A is adjusted by, for example, polishing, and a first sealing member 30A having a predetermined thickness and a flat outer surface is obtained.
- the thickness adjustment of the first sealing member 30A is a process performed as necessary, and is not essential.
- FIG. 10C shows a sub-process of peeling the resist member 50 from the one main surface 10A of the flat substrate 10.
- a first sealing member 30 ⁇ / b> A having a predetermined shape and sealing the first electronic component 17 is formed on the one main surface 10 ⁇ / b> A of the flat substrate 10.
- the circuit module 100A is completed through the connection step (fourth step) of the frame-shaped substrate 20. Since the connection process of the frame-shaped substrate 20 is the same as the manufacturing method of the circuit module 100, description thereof is omitted.
- circuit module 100B which is the third embodiment of the circuit module according to the present invention will be described with reference to FIG.
- the circuit module 100B differs from the circuit module 100 in the material and forming method of the first connecting member J1A. Since the other components are common to the circuit module 100, the description of the common components may be omitted.
- FIG. 11 is a cross-sectional view of the circuit module 100B.
- the basic components of the circuit module 100B are the same as those of the circuit module 100.
- the first connection member J1A includes an anisotropic conductive resin material, and seals the first connection electrode 14 and the second connection electrode 24.
- the first connecting member J1A seals the first connecting electrode 14 and the second connecting electrode 24
- the first connecting member J1A includes the one main surface 10F of the flat substrate 10 and the frame substrate. 20 is a state in which both the main surfaces 20F are in contact with each other and the exposed surfaces of the first connection electrode 14 and the second connection electrode 24 are covered.
- the first connection member J1A is a conductive region between the first connection electrode 14 and the second connection electrode 24 due to mutual contact of the conductive filler. Further, the first connecting member J1A also functions as an underfill between the one main surface 10F of the flat substrate 10 and the one main surface 20F of the frame substrate 20. In other words, the first connection member not only electrically connects the first connection electrode and the second connection electrode, but also mechanically connects the flat substrate and the frame substrate. Yes. Therefore, the electrical and mechanical connection reliability between the flat substrate and the frame substrate is further increased.
- FIGS. 12A to 12D are cross-sectional views schematically showing main parts of respective steps sequentially performed in an example of the method for manufacturing the circuit module 100B.
- FIG. 12A to 12C are cross-sectional views schematically showing a connection step (fourth step) for the frame-shaped substrate 20.
- the one main surface 10F (upper surface side in FIG. 12B) of the flat substrate 10 and the one main surface 20F (lower surface side in FIG. 12B) of the frame substrate 20 are interposed via the first connecting member J1A. Connected.
- the first connection member J1A includes the anisotropic conductive resin material and seals the first connection electrode 14 and the second connection electrode 24.
- FIG. 12A shows a sub-process in which the liquid resin J1Ap including an uncured anisotropic conductive resin material is disposed on the first connection electrode 14.
- the liquid resin J1Ap may be disposed on the second connection electrode 24, or may be disposed on both the first connection electrode 14 and the second connection electrode 24. .
- the first connection electrode 14 and the second connection electrode 24 are opposed to each other via the liquid resin J1Ap, and the first connection electrode 14 and the second connection electrode 24 approach each other (arrows).
- the liquid resin J1Ap between the first connection electrode 14 and the second connection electrode 24 is pressurized, and the first connection electrode 14 and the second connection electrode 24 are further displaced. This represents a sub-process embedded in the liquid resin.
- the liquid resin J1Ap contains an uncured anisotropic conductive resin material, the conductive fillers come into contact with each other in the pressurized region and become conductive.
- the first connection electrode 14 and the second connection electrode 24 are embedded in the liquid resin J1Ap by pressurization, but the one main surface 10F of the flat substrate 10 and the one main surface 20F of the frame substrate 20 Since almost no pressure is applied to the region surrounding the periphery of the first connection electrode 14 and the second connection electrode 24, the liquid resin J1Ap in this region is insulative.
- FIG. 12C shows that the first connection electrode 14 and the second connection electrode 24 are electrically connected by heating and curing the liquid resin J1Ap, and the first connection electrode 14 and the second connection electrode are electrically connected.
- 24 is a sub-process for sealing the first connecting member J1A.
- the conductive region for electrically connecting the connection electrodes and the one main surface 10F of the flat substrate 10 and the one main surface 20F of the frame substrate 20 are mechanically connected as an underfill.
- a first connecting member J1A having an insulating region is formed.
- FIG. 12D is a cross-sectional view schematically showing a state where the circuit module 100B is completed by inverting the upper and lower sides after the completion of each process described above.
- circuit module 100C which is a fourth embodiment of the circuit module according to the present invention, will be described with reference to FIG.
- the circuit module 100C is different from the circuit module 100 in the material and formation method of the first connecting member J1B, and has an insulating resin member J1C. Since the other components are common to the circuit module 100, the description of the common components may be omitted.
- FIG. 13 is a cross-sectional view of the circuit module 100C.
- the basic components of the circuit module 100B are the same as those of the circuit module 100.
- the first connecting member J1B includes a metal material containing Sn.
- the metal material containing Sn include a Sn—Ag—Cu-based Pb-free solder material.
- the insulating resin member J1C is disposed so as to seal the first connection electrode 14, the second connection electrode 24, and the first connection member J1B, whereby one main surface 10F of the flat substrate 10 is provided. And an underfill between one main surface 20F of the frame-shaped substrate 20.
- the insulating resin member J1C includes an insulating resin material such as an epoxy resin.
- an insulating resin material such as an epoxy resin.
- fine particles of glass material, fine particles of Si oxide, or the like may be dispersed as a filler.
- the insulating resin member J1C seals the first connecting electrode 14, the second connecting electrode 24, and the first connecting member J1B.
- the insulating resin member J1C is one main surface of the flat substrate 10. 10F and the one main surface 20F of the frame-shaped board
- the electrical connection between the first connection electrode 14 and the second connection electrode 24 is performed by the first connection member J1B including a metal material containing Sn. Then, the insulating resin member J1C is disposed so as to seal the first connection electrode 14, the second connection electrode 24, and the first connection member J1B, whereby one main surface 10F of the flat substrate 10 is provided. And an underfill between one main surface 20F of the frame-shaped substrate 20.
- the first connecting member J1B is a metal material such as a Pb-free solder material containing Sn, the electrical conductivity is high and the breaking strength is also high.
- the insulating resin member J1C mechanically connects the flat substrate 10 and the frame substrate 20 as an underfill. Therefore, in the circuit module 100C, the electrical and mechanical connection reliability between the flat substrate and the frame substrate is further increased.
- FIGS. 14A to 14D are cross-sectional views schematically showing the main part of each step sequentially performed in an example of the method for manufacturing the circuit module 100C.
- FIG. 14A to 14C are cross-sectional views schematically showing a connection step (fourth step) for the frame-shaped substrate 20.
- the one main surface 10F (upper surface side in FIG. 14B) of the flat substrate 10 and the one main surface 20F (lower surface side in FIG. 14B) of the frame substrate 20 are connected to the first connecting member J1B and the insulating property. It is connected via the resin member J1C.
- the first connecting member J1B includes a metal material such as Pb-free solder containing Sn.
- the insulating resin member J1C includes an insulating resin material such as an epoxy resin in which a filler is dispersed.
- FIG. 14A shows a case where a liquid resin J1Cp containing an uncured insulating resin material is arranged on the first connection electrode 14 and a metal material bump J1Bb using Pb-free solder containing Sn is used for the second connection.
- the sub-process arranged on the electrode 24 is represented.
- the liquid resin J1Cp may be disposed on the second connection electrode 24, and the metal material bump J1Bb may be disposed on the first connection electrode 14.
- the metal material bump J1Bb arranged on the second connection electrode 24 is brought into contact with the first connection electrode 14 on which the liquid resin J1Cp is arranged, and the first connection electrode 14 and the second connection are connected.
- FIG. 14C shows the first connection member J1B that electrically connects the first connection electrode 14 and the second connection electrode 24 by applying ultrasonic vibration to the metal material bump J1Bb, and heats the liquid resin J1Cp. This represents a sub-step of forming the insulating resin member J1C for sealing the first connection electrode 14, the second connection electrode 24, and the first connection member J1B by curing.
- FIG. 14D is a cross-sectional view schematically showing a state where the circuit module 100C is completed by inverting the upper and lower sides after the completion of each process described above.
- circuit module- ⁇ Circuit module structure ⁇ A structure of a circuit module 100D which is the fifth embodiment of the circuit module according to the present invention will be described with reference to FIG.
- the circuit module 100 ⁇ / b> D is different from the circuit module 100 in that the metal film 31 is disposed on the surface of the first sealing member 30. Since the other components are common to the circuit module 100, the description of the common components may be omitted.
- FIG. 15 is a cross-sectional view of the circuit module 100D.
- the basic components of the circuit module 100B are the same as those of the circuit module 100.
- the metal film 31 is disposed on the surface of the first sealing member 30 on the side facing the surface on the one main surface 10F side of the flat substrate 10.
- the metal film 31 includes a metal material such as Ag and Cu.
- the metal film 31 may contain a binder component such as a resin material as necessary in addition to the metal material.
- the metal film 31 may be arranged so as to extend on the side surface of the first sealing member 30.
- the fifth connection electrode (input / output electrode and ground electrode) 29 and the metal film 31 are arranged so as to be flush with each other, but this is not restrictive.
- the metal film 31 is connected to a connection electrode (not shown) on the circuit board of the electronic device together with the fifth connection electrode 29 of the circuit module 100D at the time of reflow connection to the circuit board of the electronic device of the circuit module 100D. That is, the number of connection points between the circuit module 100 ⁇ / b> D and the circuit board of the electronic device is larger than that of the circuit module 100. Therefore, in the circuit module 100D, the mechanical connection reliability is high.
- heat generated from the first electronic component 17 during the operation of the circuit module 100D can be efficiently released to the circuit board of the electronic device through the metal film 31. That is, damage due to self-heating of the first electronic component 17 is suppressed. Therefore, the circuit module 100D has high lifetime reliability.
- FIGS. 16A to 16C are cross-sectional views schematically showing the main part of each step sequentially performed in an example of the method for manufacturing the circuit module 100D.
- First Sealing Member Forming Process (Third Process) Including Subprocess of Metal Film 31 Arrangement> From the production or preparation process (first process) of the flat substrate 10 and the frame-shaped substrate 20, the first sealing member 30 is formed in the first sealing member 30 formation process (third process). Description of the sub-process up to is omitted.
- 16A and 16B are cross-sectional views schematically showing a case where the metal film 31 is disposed on the surface of the first sealing member 30 in the first sealing member 30 forming step (third step). It is. In this step, the metal film 31 is disposed on the surface of the molded first sealing member 30 on the side facing the surface on the one main surface 10F side of the flat substrate 10.
- FIG. 16A shows a state in which the first sealing member 30 of the photocurable resin is formed on the one main surface 10F of the flat substrate 10 in the same manner as the method for manufacturing the circuit module 100 described above.
- the first sealing member 30 ⁇ / b> A made of a thermosetting resin may be formed on the one main surface 10 ⁇ / b> F of the flat substrate 10 in the same manner as the manufacturing method of the circuit module 100 ⁇ / b> A.
- FIG. 16B shows a sub-process of disposing the metal film 31 on the surface of the first sealing member 30 on the side facing the surface on the one main surface 10F side of the flat substrate 10.
- the metal film 31 is formed, for example, by screen printing a metal material paste containing Ag particles and a resin material.
- the metal film 31 may be formed by a thin film forming method such as sputtering or vapor deposition using, for example, Cu or an alloy containing Cu as a base material.
- the photocurable precursor 30p of the first sealing member 30 is once set in a semi-cured state and the previously formed metal film 31 is transferred, the photocured precursor 30p in the semi-cured state is cured and the first cured member 30p is cured.
- the metal film 31 may be disposed on the surface of the first sealing member 30.
- the metal film 31 may be disposed on the surface of the first sealing member 30A.
- the metal film 31 is disposed on the surface of the first sealing member 30A, as shown in FIG. 16C, the metal film 31 is formed on the first sealing member 30A before the resist member 50 is peeled off. It may be arranged on the surface. In this case, since the metal film 31 is disposed on the surface of the first sealing member 30A with the resist member 50 and the first sealing member 30A being flush with each other, the metal film 31 can be easily formed and transferred. To be implemented. Further, since the metal film 31 is disposed on the surface of the first sealing member 30A in a state where the resist member 50 covers the first connection electrode 14 and the periphery thereof, the first connection electrode 14 and the periphery thereof are made of metal. It is not contaminated by the components of the film 31.
- 100, 100A, 100B, 100C, 100D circuit module 10 flat substrate, 10F, 20F one main surface, 10S, 20S other main surface, 11 first insulator layer, 12 pattern conductor, 13 first via conductor, 14 1st connection electrode, 15 3rd connection electrode, 16 4th connection electrode, 17 1st electronic component, 18 2nd electronic component, 20 Frame-shaped substrate, 20I inner surface, 21 2nd insulator Layer, 23 second via conductor, 24 second connection electrode, 29 fifth connection electrode, 30, 30A first sealing member, 30 Ap thermosetting precursor, 30 p, 50 p photocurable precursor, 31 Metal film, 40 second sealing member, 40p precursor, 50 resist member, 50a opening, C cavity, J1, J1A, J1B first connection member, J1Bb Metallic material bumps, J1C insulating resin member, J2 second connecting member, J3 third connecting member.
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- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
Abstract
Description
この発明に係る回路モジュールは、以下の特徴を有する、平板状基板と、枠状基板と、第1の電子部品と、第1の封止部材とを備えている。平板状基板の一方主面の周縁部には、複数の第1の接続電極が配置されている。枠状基板の一方主面の第1の接続電極に対応する位置には、複数の第2の接続電極が配置されている。第1の接続電極と第2の接続電極とは、第1の接続部材を介して接続されている。第1の電子部品は、第1の封止部材により封止されている。
この発明に係る回路モジュールの製造方法は、平板状基板と、枠状基板と、第1の電子部品と、第1の封止部材とを備えた回路モジュールを製造するためのものである。回路モジュールは、以下の特徴を有している。平板状基板の一方主面の周縁部には、複数の第1の接続電極が配置されている。枠状基板の一方主面の第1の接続電極に対応する位置には、複数の第2の接続電極が配置されている。第1の接続電極と第2の接続電極とは、第1の接続部材を介して接続されている。第1の電子部品は、第1の封止部材により封止されている。そして、この発明に係る回路モジュールの製造方法は、以下の4つの工程を備えている。
≪回路モジュールの構造≫
この発明に係る回路モジュールの第1の実施形態である回路モジュール100の構造について、図1ないし図3を用いて説明する。各図面は模式図であり、実際の製品の寸法は必ずしも反映されていない。また、製造工程上で発生する各構成要素の形状のばらつきなども、各図面に必ずしも反映されていない。すなわち、以後で用いる図面は、たとえ実際の製品と異なる部分があったとしても、本質的な面で実際の製品を表すものと言うことができる。
この発明に係る回路モジュールの第1の実施形態である回路モジュール100の製造方法の一例について、図4Aないし図6Bを用いて説明する。図4Aないし図6Bは、回路モジュール100の製造方法の一例において順次行われる各工程の要部をそれぞれ模式的に表す断面図である。なお、図4Aないし図6Bの各図は、図2における回路モジュール100のIII-III矢視断面図(図3参照)に相当する(以下の断面図についても同様)。
図4Aは、平板状基板10および枠状基板20の作製または準備工程(第1の工程)を模式的に表す断面図である。第1の工程では、所望の形状および構成を有する平板状基板10および枠状基板20を作製する。あるいは、平板状基板10および枠状基板20の少なくとも一方が既存である場合は、それを流用して準備するようにしてもよい。平板状基板10および枠状基板20の構造の説明は、回路モジュール100の構造の項目で既に行なわれているので、ここでは省略される。
図4Bは、第2の電子部品18の接続工程を模式的に表す断面図である。この工程で、平板状基板10の他方主面10S(図4Bでは上面側)に配置されている第4の接続電極16に、第3の接続部材J3を介して第2の電子部品18が接続される。なお、第2の電子部品18が不要である場合は、この工程は実施されない。
図4Cおよび図4Dは、第2の封止部材40の形成工程を模式的に表す断面図である。この工程で、第4の接続電極16に接続された第2の電子部品18が第2の封止部材40により封止される。なお、第2の電子部品18が平板状基板10に接続されていない場合は、この工程は実施されない。また、第2の電子部品18が平板状基板10に接続されている場合であっても、この工程は実施されないことがある。
図5Aは、第1の電子部品17の接続工程(第2の工程)を模式的に表す断面図である。この工程で、第2の封止部材40が形成された平板状基板10の上下が反転され、平板状基板10の一方主面10F(図5Aでは上面側)に配置されている第3の接続電極15に、第2の接続部材J2を介して第1の電子部品17が接続される。
図5Bないし図5Dは、第1の封止部材30の形成工程を模式的に表す断面図である。この工程で、第3の接続電極15に接続された第1の電子部品17が第1の封止部材30により封止される。
図6Aは、枠状基板20の接続工程(第4の工程)を模式的に表す断面図である。この工程で、平板状基板10の一方主面10F(図6Aでは上面側)の周縁部に配置されている第1の接続電極14と、枠状基板20の一方主面20F(図6Aでは下面側)に配置された第2の接続電極24とが、第1の接続部材J1を介して接続される。第1の接続部材J1は、前述したように、例えばAgナノ粒子ペーストの焼結体である。これにより、平板状基板10の一方主面10Fと枠状基板20の内側面20Iとを含むキャビティCが構成される。
以上で説明した回路モジュール100の製造方法では、個片化された平板状基板10に第1の電子部品17および第2の電子部品18が接続され、第1の封止部材30および第2の封止部材40が形成され、枠状基板20が接続されている。一方、集合状態の平板状基板10Mを用いて各工程が実施されるようにしてもよい。
<第2の封止部材の形成工程>
集合状態の平板状基板10Mおよび枠状基板20の作製または準備工程(第1の工程)、および第2の電子部品18の接続工程の説明は省略される。図7Aは、集合状態の平板状基板10Mを用いた第2の封止部材40Mの形成工程を模式的に表す断面図である。この工程で、第2の電子部品18が接続された集合状態の平板状基板10Mの他方主面10MSに、第2の電子部品18を封止するように第2の封止部材40Mが形成される。
第1の電子部品17の接続工程(第2の工程)の説明は省略される。図7Bは、第1の封止部材30の形成工程(第3の工程)を模式的に表す断面図である。この工程で、第1の電子部品17が接続された集合状態の平板状基板10Mの一方主面10MFに、第1の電子部品17を封止するように複数の第1の封止部材30が形成される。
図7Cは、枠状基板20の接続工程(第4の工程)を模式的に表す断面図である。この工程で、集合状態の平板状基板10Mの一方主面10MFに、複数の枠状基板20が接続され、集合状態の回路モジュール100Mが製造される。枠状基板20の集合状態の平板状基板10Mへの接続方法は、前述の回路モジュール100の製造方法における枠状基板の接続工程(図6A)と同様である。
図7Dは、集合状態の回路モジュール100Mの個片化工程を模式的に表す断面図である。この工程で、上記で説明した工程により製造された、集合状態の回路モジュール100Mが個片化され、個々の回路モジュール100とされる。集合状態の回路モジュール100Mの個片化は、ダイシングソーによる切断など、周知の方法で実施される。図7Eは、以上で説明した各工程の終了後、上下を反転して回路モジュール100が完成された状態を模式的に表す断面図である。
≪回路モジュールの構造≫
この発明に係る回路モジュールの第2の実施形態である回路モジュール100Aの構造について、図8を用いて説明する。回路モジュール100Aは、第1の封止部材30Aの材質および形成方法が回路モジュール100と異なる。それ以外の構成要素は回路モジュール100と共通であるため、共通する構成要素については説明が省略されることがある。
この発明に係る回路モジュールの第2の実施形態である回路モジュール100Aの製造方法の一例について、図9Aないし図10Cを用いて説明する。図9Aないし図10Cは、回路モジュール100Aの製造方法の一例において順次行われる各工程の要部をそれぞれ模式的に表す断面図である。
平板状基板10および枠状基板20の作製または準備工程(第1の工程)、第2の電子部品18の接続工程、および第2の封止部材40の説明は省略される。図9Aは、第1の電子部品17の接続工程(第2の工程)を模式的に表す断面図である。この工程で、平板状基板10の一方主面10F(図9Aでは上面側)に配置されている第3の接続電極15に、第2の接続部材J2を介して第1の電子部品17が接続される。
図9Bないし図10Cは、第1の封止部材30Aの形成工程(第3の工程)を模式的に表す断面図である。この工程で、第3の接続電極15に接続された第1の電子部品17が第1の封止部材30Aにより封止される。
≪回路モジュールの構造≫
この発明に係る回路モジュールの第3の実施形態である回路モジュール100Bの構造について、図11を用いて説明する。回路モジュール100Bは、第1の接続部材J1Aの材質および形成方法が回路モジュール100と異なる。それ以外の構成要素は回路モジュール100と共通であるため、共通する構成要素については説明が省略されることがある。
この発明に係る回路モジュールの第3の実施形態である回路モジュール100Bの製造方法の一例について、図12Aないし図12Dを用いて説明する。図12Aないし図12Dは、回路モジュール100Bの製造方法の一例において順次行われる各工程の要部をそれぞれ模式的に表す断面図である。
平板状基板10および枠状基板20の作製または準備工程(第1の工程)から第1の封止部材30の形成工程(第3の工程)までの説明は省略される。図12Aないし図12Cは、枠状基板20の接続工程(第4の工程)を模式的に表す断面図である。この工程で、平板状基板10の一方主面10F(図12Bでは上面側)と、枠状基板20の一方主面20F(図12Bでは下面側)とが、第1の接続部材J1Aを介して接続される。
≪回路モジュールの構造≫
この発明に係る回路モジュールの第4の実施形態である回路モジュール100Cの構造について、図13を用いて説明する。回路モジュール100Cは、第1の接続部材J1Bの材質および形成方法が回路モジュール100と異なり、また絶縁性樹脂部材J1Cを有している。それ以外の構成要素は回路モジュール100と共通であるため、共通する構成要素については説明が省略されることがある。
この発明に係る回路モジュールの第4の実施形態である回路モジュール100Cの製造方法の一例について、図14Aないし図14Dを用いて説明する。図14Aないし図14Dは、回路モジュール100Cの製造方法の一例において順次行われる各工程の要部をそれぞれ模式的に表す断面図である。
平板状基板10および枠状基板20の作製または準備工程(第1の工程)から第1の封止部材30の形成工程(第3の工程)までの説明は省略される。図14Aないし図14Cは、枠状基板20の接続工程(第4の工程)を模式的に表す断面図である。この工程で、平板状基板10の一方主面10F(図14Bでは上面側)と、枠状基板20の一方主面20F(図14Bでは下面側)とが、第1の接続部材J1Bおよび絶縁性樹脂部材J1Cを介して接続される。
≪回路モジュールの構造≫
この発明に係る回路モジュールの第5の実施形態である回路モジュール100Dの構造について、図15を用いて説明する。回路モジュール100Dは、第1の封止部材30の表面に、金属膜31が配置されていることが回路モジュール100と異なる。それ以外の構成要素は回路モジュール100と共通であるため、共通する構成要素については説明が省略されることがある。
この発明に係る回路モジュールの第5の実施形態である回路モジュール100Dの製造方法の一例について、図16Aないし図16Cを用いて説明する。図16Aないし図16Cは、回路モジュール100Dの製造方法の一例において順次行われる各工程の要部をそれぞれ模式的に表す断面図である。
平板状基板10および枠状基板20の作製または準備工程(第1の工程)から、第1の封止部材30の形成工程(第3の工程)のうち第1の封止部材30を成形するまでの副工程の説明は省略される。図16Aおよび図16Bは、第1の封止部材30の形成工程(第3の工程)において、第1の封止部材30の表面に金属膜31が配置される場合を模式的に表す断面図である。この工程で、成形された第1の封止部材30の、平板状基板10の一方主面10F側の表面と対向する側の表面に、金属膜31が配置される。
Claims (13)
- 一方主面の周縁部に複数の第1の接続電極が配置された平板状基板と、一方主面の前記第1の接続電極に対応する位置に複数の第2の接続電極が配置された枠状基板と、第1の電子部品と、第1の封止部材とを備え、前記第1の接続電極と前記第2の接続電極とが、第1の接続部材を介して接続され、前記第1の電子部品は、前記第1の封止部材により封止されている回路モジュールにおいて、
前記第1の電子部品および前記第1の封止部材は、前記平板状基板の一方主面と前記枠状基板の内側面とを含んで構成されるキャビティ内に配置され、
前記第1の封止部材は、前記枠状基板の内側面から隔離されている、回路モジュール。 - 前記第1の封止部材は、光硬化性樹脂材料を含んでなる、請求項1に記載の回路モジュール。
- 前記第1の接続部材は、融点が900℃以上の金属材料を含んでなる、請求項1または請求項2に記載の回路モジュール。
- 前記第1の接続部材は、異方導電性樹脂材料を含んでなり、かつ前記第1の接続電極と前記第2の接続電極とを封止している、請求項1または請求項2に記載の回路モジュール。
- 前記第1の接続部材は、Snを含む金属材料を含んでなり、かつ前記第1の接続電極と前記第2の接続電極と前記第1の接続部材とは、絶縁性樹脂部材により封止されている、請求項1または請求項2に記載の回路モジュール。
- 前記第1の封止部材の、前記平板状基板の一方主面側の表面と対向する側の表面には、金属膜が配置されている、請求項1ないし請求項5のいずれか1項に記載の回路モジュール。
- 一方主面の周縁部に複数の第1の接続電極が配置された平板状基板と、一方主面の前記第1の接続電極に対応する位置に複数の第2の接続電極が配置された枠状基板と、第1の電子部品と、第1の封止部材とを備え、前記第1の接続電極と前記第2の接続電極とが、第1の接続部材を介して接続され、前記第1の電子部品は、前記第1の封止部材により封止されている回路モジュールの製造方法において、
前記平板状基板および前記枠状基板を準備する第1の工程と、
前記第1の電子部品を前記平板状基板の一方主面上に接続する第2の工程と、
前記第1の接続電極と前記第2の接続電極とを接続することにより、前記平板状基板の一方主面と前記枠状基板の内側面とを含むキャビティが構成された際に、前記第1の電子部品を封止し、かつ前記枠状基板の内側面から隔離された所定の形状となるように、前記第1の封止部材を前記平板状基板の一方主面上に形成する第3の工程と、
前記第1の接続電極と前記第2の接続電極とを前記第1の接続部材を介して接続する第4の工程とを備えている、回路モジュールの製造方法。 - 前記第1の封止部材は、光硬化性樹脂材料を含んでなり、
前記第3の工程は、前記一方主面上に前記第1の封止部材の光硬化性前駆体を配置する副工程と、
前記第1の封止部材の光硬化性前駆体を露光して、前記所定の形状の前記第1の封止部材とする副工程とを備えている、請求項7に記載の回路モジュールの製造方法。 - 前記第1の封止部材は、熱硬化性樹脂材料を含んでなり、
前記第3の工程は、前記一方主面上にレジスト部材の光硬化性前駆体を配置する副工程と、
前記レジスト部材の光硬化性前駆体を露光して、前記所定の形状のネガパターンである形状のレジスト部材とする副工程と、
前記レジスト部材が設けられた前記一方主面上に第1の封止部材の熱硬化性前駆体を配置する副工程と、
前記第1の封止部材の熱硬化性前駆体を加熱して、前記所定の形状の前記第1の封止部材とする副工程と、
前記レジスト部材を前記一方主面から剥離する副工程とを備えている、請求項7に記載の回路モジュールの製造方法。 - 前記第3の工程は、前記第1の封止部材の前記平板状基板の一方主面側の表面と対向する側の表面に金属膜を配置する副工程をさらに含む、請求項7ないし請求項9のいずれか1項に記載の回路モジュールの製造方法。
- 前記第4の工程は、融点が900℃以上の金属材料のナノ粒子を含んでなる金属材料ペーストを、前記第1の接続電極および前記第2の接続電極の少なくとも一方上に配置する副工程と、
前記第1の接続電極と前記第2の接続電極とを前記金属材料ペーストを介して対向させる副工程と、
前記金属材料ペーストを加熱して焼結させることにより、融点が900℃以上の金属材料を含み、かつ前記第1の接続電極と前記第2の接続電極とを電気的に接続する、前記第1の接続部材とする副工程とを備えている、請求項7ないし請求項10のいずれか1項に記載の回路モジュールの製造方法。 - 前記第4の工程は、未硬化の異方導電性樹脂材料を含んでなる液状樹脂を、前記第1の接続電極および前記第2の接続電極の少なくとも一方上に配置する副工程と、
前記第1の接続電極と前記第2の接続電極とを前記液状樹脂を介して対向させ、かつ前記第1の接続電極と前記第2の接続電極とを互いに接近する方向に相対的に変位させて、前記第1の接続電極と前記第2の接続電極との間の前記液状樹脂を加圧し、さらに前記第1の接続電極と前記第2の接続電極とを前記液状樹脂中に埋め込む副工程と、
前記液状樹脂を加熱して硬化させることにより、前記第1の接続電極と前記第2の接続電極とを電気的に接続し、かつ前記第1の接続電極と前記第2の接続電極とを封止する、前記第1の接続部材とする副工程とを備えている、請求項7ないし請求項10のいずれか1項に記載の回路モジュールの製造方法。 - 前記第4の工程は、Snを含む金属材料を含んでなる金属材料バンプを、前記第1の接続電極または前記第2の接続電極の一方上に配置し、かつ未硬化の絶縁性樹脂材料を含んでなる液状樹脂を、前記第1の接続電極または前記第2の接続電極の他方上に配置する副工程と、
前記金属材料バンプを、前記液状樹脂が配置されている前記第1の接続電極または前記第2の接続電極の他方に接触させ、かつ前記第1の接続電極と前記第2の接続電極と前記金属材料バンプとを、前記液状樹脂中に埋め込む副工程と、
前記金属材料バンプに超音波振動を加えて、前記第1の接続電極と前記第2の接続電極とを電気的に接続する前記第1の接続部材とし、かつ前記液状樹脂を加熱して硬化させることにより、前記第1の接続電極と前記第2の接続電極と前記第1の接続部材とを封止する絶縁性樹脂部材とする副工程とを備えている、請求項7ないし請求項10のいずれか1項に記載の回路モジュールの製造方法。
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