WO1995008189A1 - Multi-chip module - Google Patents
Multi-chip module Download PDFInfo
- Publication number
- WO1995008189A1 WO1995008189A1 PCT/JP1994/001517 JP9401517W WO9508189A1 WO 1995008189 A1 WO1995008189 A1 WO 1995008189A1 JP 9401517 W JP9401517 W JP 9401517W WO 9508189 A1 WO9508189 A1 WO 9508189A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wiring board
- printed wiring
- chip
- bare
- chip module
- Prior art date
Links
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Classifications
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- H—ELECTRICITY
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- H01L25/50—Multistep manufacturing processes of assemblies consisting of devices, the devices being individual devices of subclass H10D or integrated devices of class H10
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- H01L23/18—Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device
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- H01L23/538—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
- H01L23/5385—Assembly of a plurality of insulating substrates
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- H01L25/065—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10D89/00
- H01L25/0655—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10D89/00 the devices being arranged next to each other
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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Definitions
- the present invention relates to a multi-chip module (MCM) in which a plurality of bare IC chips are mounted on one printed wiring board.
- MCM multi-chip module
- the IC mounted on the printed wiring board 1 shown in FIG. 1 has changed from a package type IC 2 to a bare IC chip 3 shown in FIG. Further progress has been made to the multi-chip module 5 shown in Figure 3.
- the structure shown in FIG. 2 is a structure in which the bare IC chip 3 is directly mounted on the printed wiring board 1 by a die bonding method, a die bonding method, or the like.
- the mounting area becomes smaller as compared with a case where a package type IC 2 covered with a plastic material / ceramic material package is surface-mounted on the printed wiring board 1.
- the work (repair) for removing only the defective bare IC chip 3 is required. Because it is difficult and troublesome, the entire printed circuit board is discarded. In other words, there was a disadvantage that the yield in the manufacturing process was poor.
- the manufacturing process of the multi-chip module 5 will be briefly described with reference to FIGS.
- the bare IC chip 52 is die-bonded and fixed on the multilayer printed wiring board 51, and furthermore, Connect each part with wire bonding.
- a dam frame 53 is attached to each bare IC chip 52 and sealed with a resin.
- a galling type (Gull) is formed on an electrode pad provided on the peripheral portion of the printed wiring board 51 as an external electrode.
- the multi-chip module 5 is completed by soldering the lead terminals 5 5 of the Wing Type).
- this multi-chip module 5 it is possible to test the operation of the module alone, so that only a good multi-chip module 5 can be used as a printed circuit board such as a mother board (hereinafter referred to as the main printed circuit board) 1. Can be implemented.
- the conventional multichip module 5 has the following disadvantages.
- a large number of lead terminals 55 must be soldered around the printed wiring board 51, which increases the number of work steps, and the lead terminals 55 become the main printed wiring board 1.
- the electronic component mounting density of the main printed wiring board 1 is reduced by the portion occupying the upper part.
- a circuit pattern (not shown) for electrically connecting the plurality of bare IC chips 52 needs to be arranged around the bare IC chip 52, and is mounted on the printed wiring board 51.
- the printed wiring board 51 becomes larger than the size of the bare IC chip 52.
- the dam frame 53 for sealing the bare IC chip 52 with the resin 57 is attached, the area occupied by the dam frame 53 mounted around the individual bare IC chip 52 is large. From this point, the printed wiring board 51 becomes larger.
- the dam frame 53 is positioned by inserting the protrusion 53a provided in the dam frame 53 into the hole 51a of the printed wiring board 51 and positioning the dam frame 53.
- a multi-module is to be provided by providing a resistor element (resistor) for circuit adjustment and a capacitor in the multi-chip module 5, and a chip module is to be provided, a chip resistor element and chip capacitor will be provided around the bare IC chip 52. Therefore, it is necessary to provide a space for the soldering and an electrode pad for soldering these components, and therefore, the printed wiring board 51 is further increased in size. Also, after the bare IC chip 52 is sealed with resin, these chip components must be soldered. That is, the number of man-hours increases.
- the conventional multi-chip module requires a lot of man-hours for mounting the lead terminals. Also, the size is increased by the amount of the lead terminals. In addition, the printed wiring board becomes larger because circuit patterns for connecting the bare IC chips are arranged. In addition, the man-hour for attaching the dam frame to each bare IC chip increases. Also, by installing a dam frame As a result, the printed wiring board becomes larger. Also, it was difficult to vacuum-adsorb the dam frame to adsorb the multi-chip module to the main printed wiring board.
- the disadvantage is that the multi-chip module becomes larger and the main printed wiring board on which the module is mounted becomes larger. there were.
- the present invention has been made to solve the above-mentioned conventional drawbacks, and can be made smaller than the conventional multi-chip module, the number of manufacturing steps is reduced, and the process of mounting on a main printed wiring board by vacuum suction is performed.
- An object of the present invention is to provide a multi-chip module that facilitates the operation.
- a multi-chip module is configured such that the first invention includes a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, and the printed wiring board is formed of another printed wiring board.
- the outer peripheral surface of the printed circuit board has a shape in which a through hole is cut in half lengthwise, and an external electrode pad to be soldered to another printed circuit board is provided.
- a second invention comprises a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, and a multi-layer printed wiring board mounted on another printed wiring board.
- a circuit pattern is provided on a surface of at least one of a plurality of regions of a printed wiring board on which a plurality of bare IC chips are mounted, and an insulating layer is provided on this circuit pattern.
- a circuit pattern is provided on at least one surface of a plurality of regions of the printed wiring board on which a plurality of bare IC chips are mounted, and an insulating film is provided on the circuit pattern. Layers are provided.
- a fourth invention is a multi-chip module including a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, wherein the printed wiring board is mounted on another printed wiring board.
- At least one of a printed resistor element and a printed dielectric is provided on a surface of at least one of a plurality of regions of the printed wiring board on which a plurality of bare IC chips are mounted,
- An insulating layer is provided on the printed resistive element and the printed dielectric.
- the multi-chip module according to the fifth invention is characterized in that at least one of the printed resistive element and the printed dielectric is provided on a surface of at least one of a plurality of regions of the printed wiring board on which a plurality of bare IC chips are mounted. One is provided, and an insulating layer is provided on the printed resistance element and the printed dielectric.
- a sixth invention comprises a printed wiring board, and a plurality of bare IC chips mounted on the printed wiring board, wherein the printed wiring board is mounted on another printed wiring board.
- the printed wiring board is formed in multiple layers, and an interstitial via hole is provided from the mounting surface side of the bare IC chip to the inner layer. It is configured to be electrically connected through a conductor layer provided in the semiconductor device.
- the printed wiring board is formed in multiple layers, and the printed wiring board extends from the mounting surface side of the bare IC chip to the inner layer.
- a provisional via hole is provided, and the bare IC chips are electrically connected to each other through the interstitial via hole and a conductor layer provided in an inner layer.
- An eighth invention is a multi-chip module comprising a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, wherein the printed wiring board is mounted on another printed wiring board.
- the printed wiring board is formed in multiple layers, and a resistance element having both ends electrically connected to a conductor layer provided in the inner layer is provided in the inner layer.
- the multi-chip module of the ninth invention has a configuration in which the printed wiring board is formed in multiple layers, and a resistance element whose both ends are electrically connected to a conductor layer provided in the inner layer is provided in the inner layer.
- a tenth invention is a multichip module including a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, wherein the printed wiring board is mounted on another printed wiring board.
- the printed wiring board is formed in multiple layers, and a dielectric layer in which both surfaces are electrically connected to a conductor layer provided in the inner layer is provided in the inner layer.
- the multi-chip module of the eleventh invention has a configuration in which a printed wiring board is formed in multiple layers and a dielectric layer in which both surfaces are electrically connected to a conductor layer provided in the inner layer is provided in the inner layer.
- a printed wiring board comprising a plurality of bare IC chips mounted on the printed wiring board, wherein the printed wiring board is mounted on another printed wiring board.
- the printed wiring board is formed in multiple layers, and the printed circuit board provided in the inner layer is provided.
- the resistance element whose both ends are electrically connected to the body layer and the dielectric layer whose both surfaces are electrically connected to the conductor layer provided in the inner layer are provided in the inner layer.
- the printed wiring board is formed in multiple layers, and both ends are electrically connected to the conductor element provided in the inner layer and the conductor element provided in the inner layer. Is a configuration in which a dielectric layer electrically connected is provided in the inner layer.
- the multi-chip module according to the fourteenth aspect of the present invention has at least one of a printed resistive element for trimming and a printed dielectric, which is capable of trimming, on the surface of the printed wiring board and outside the mounting area of the bare IC chip. This is the configuration provided.
- the fifteenth invention is configured to include a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, and the printed wiring board is mounted on another printed wiring board.
- the printed wiring board is configured to surround a plurality of bare IC chips and to be provided with a dam frame filled with a resin for sealing the bare IC chips.
- the multi-chip module of the sixteenth invention has a configuration in which a printed wiring board surrounds a plurality of bare IC chips and is provided with a dam frame filled with a resin for sealing the bare IC chips.
- the dam frame of the multi-chip module has a configuration in which a reinforcing portion is provided so as to partition between bare IC chips.
- the printed wiring board is provided with an electrode pad on the periphery of the bare IC chip mounting surface, and a boundary between the electrode pad and the periphery of the electrode pad is formed. This is the reference position for attaching the dam frame to the printed wiring board.
- an electrode pad is provided on the printed wiring board on the periphery of the bare IC chip mounting surface side, and a solder resist is provided adjacent to the electrode pad. The boundary between the solder and the solder register is the reference position for attaching the dam frame to the printed wiring board.
- the multi-chip module of the second invention is configured so that the resin for sealing bare IC chips is filled in the dam frame within a range in which the upper surface does not become higher than the upper end surface of the dam frame.
- the multi-chip module according to the twenty-first invention has a configuration in which a bare IC chip is mounted on a printed wiring board by flip-chip bonding.
- the twenty-second invention is configured to include a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, and the printed wiring board is mounted on another printed wiring board In the multi-chip module, through holes are provided at the ends of the printed wiring board as external electrode pads that are soldered to other printed wiring boards.
- the twenty-third invention comprises a printed wiring board and a plurality of bare IC chips mounted on the printed wiring board, and the printed wiring board is mounted on another printed wiring board.
- an external electrode pad to be soldered to another printed wiring board is formed to extend on the outer peripheral surface of the printed wiring board.
- the twenty-fourth invention has a configuration in which the multichip module is arranged in a parallel or vertical state on another printed wiring board, and the external electrode pads are soldered to the land of the other printed wiring board.
- the multi-chip module according to the twenty-fifth invention dams bare IC chips. It is arranged in a frame, filled with resin, sealed with the paired IC chips, and further arranged with bare IC chips on the dam frame and the resin.
- the multichip module of the 26th invention has a configuration in which a through-hole or a concave portion for disposing a bare IC chip is provided in a printed wiring board, and a bare IC chip is disposed in the through-hole or concave portion to perform connection by wire bonding. is there.
- the multi-chip module according to the twenty-seventh aspect of the present invention provides a through-hole in another printed wiring board, fits the multi-chip module into the through-hole, and arranges the external electrode pad of the multi-chip module to another printed circuit board. It is configured to connect to the land pattern of the printed circuit board.
- the multichip module of the twenty-eighth invention has a configuration in which a bare IC chip is directly connected to an external electrode pad by wire bonding.
- the multi-chip module according to the twentieth aspect of the invention has a configuration in which at least one of a printed resistor element and a printed dielectric is formed, and a printed conductor that is an inductor for processing a high-frequency signal is formed.
- a multi-chip module according to a thirtieth aspect of the present invention has a configuration in which a flexible wiring board is used as another printed wiring board on which the multi-chip module is arranged.
- the multi-chip module of the thirty-first invention is configured such that the dam frame is made of a metal member for radiating heat of the bare IC chip, and the bare IC chip is sealed with a heat conductive resin.
- a multi-chip module according to a thirty-second aspect of the present invention has a configuration in which a member of a dam frame made of a metal member extends to a position for closing an upper part of the bare IC chip, and seals the bare IC chip with a heat conductive resin.
- the multi-chip module of the 33rd invention is configured to include a conductive cover for electromagnetically shielding a bare IC chip arranged on a printed wiring board.
- the multi-chip module according to the thirty-fourth aspect has a configuration provided with a conductive cover disposed on another printed wiring board for electromagnetically shielding the multi-chip module.
- the multi-chip module according to the thirty-fifth invention is configured such that a multilayer printed wiring board is one or a combination of a ceramic material, a glass epoxy material, and a resin material.
- the multi-chip module according to the first, fifth, seventh, ninth, ninth, eleventh, sixteenth, twenty-second, twenty-third, and twenty-eighth inventions according to this configuration uses this multi-chip module.
- the shape of a through-hole cut in half vertically for soldering to another printed wiring board to be placed or the external electrode pad of the through-hole, and the external electrode pad extends and the printed wiring board Since the bare IC chip is directly connected to the external electrode pad by wire bonding, the bare IC chip is connected to the peripheral edge of the printed wiring board like a conventional multi-chip module. There is no need to provide a lead terminal.
- a circuit pattern is formed on the bottom surface side of the bare IC chip on the surface of the printed wiring board. This reduces the number of circuit patterns required around the bare IC chip.
- a lead terminal is provided similarly to the multi-chip module according to the first and second aspects. No longer needed, Bear I. Chips
- a resistor is provided on the surface of the printed wiring board and on the bottom side of the bare IC chip. Since elements, capacitors, and inductors can be formed, there is no need to provide chip resistor elements, chip capacitors, and inductors around the bare IC chip.
- the multi-chip module includes a ceramic material, a glass epoxy material, a resin material, or a combination of multiple layers.
- a plurality of bare IC chips are electrically connected to each other through a conductor layer provided in an inner layer of the printed wiring board and an interstitial via hole. Therefore, the number of circuit patterns that need to be provided around the bare IC chip is reduced.
- the resistance element can be formed in the inner layer of the printed wiring board, it is not necessary to provide the chip resistance element on the surface of the printed wiring board.
- the capacitor is formed in the inner layer of the printed wiring board, so that it is not necessary to provide the chip capacitor on the surface of the printed wiring board.
- the multi-chip module according to the first, second, third, and sixth inventions has a resistive element, a capacitor, and an inductor formed in an inner layer of a printed wiring board. Therefore, there is no need to provide chip resistance elements, chip capacitors, and inductors on the surface of the printed wiring board.
- a printable resistive element, a printed dielectric, and a printed inductor that can be trimmed are provided, and any one of the first to the thirteenth is provided.
- a plurality of bare IC chips are surrounded by one dam frame, and it is not necessary to provide a dam frame for each bare IC chip.
- the reinforcing portion is provided on the dam frame, so that thermal distortion during resin sealing and reflow soldering can be reduced.
- the dam frame is attached to the printed wiring board with reference to the boundary between the electrode pad and the periphery of the electrode pad.
- a solder resist for example, green
- an electrode pad for example, gold
- the portion surrounded by the dam frame of the multi-chip module is vacuum-adsorbed. It can be easily absorbed by a vessel.
- the bare IC chip is mounted on the printed wiring board by flip chip bonding, so that the surface of the printed wiring board is bonded around the bare IC chip. There is no need to provide additional pads.
- the multi-chip module according to the twenty-fourth aspect since the multi-chip module is arranged in a state parallel or perpendicular to another printed wiring board, the degree of freedom of the arrangement can be obtained.
- the bare IC chip is filled in the dam frame with resin and sealed, and the bare IC chip is further disposed on the dam frame and the resin. Are deployed more.
- the bare IC chip is arranged in the through hole or the concave portion of the printed wiring board and is connected by wire bonding.
- the overall thickness is reduced.
- the multi-chip module since the multi-chip module is arranged on the flexible wiring board, the three-dimensional arrangement is possible.
- the dam frame of the metal member is sealed with the heat conductive resin, the bare IC chip is reliably radiated.
- the bare IC chip or the multichip module is electromagnetically shielded by surrounding it with a conductive cover so that the electrodes are not short-circuited.
- FIG. 1 is a plan view showing a printed wiring board on which a conventional package type IC is mounted.
- FIG. 2 is a perspective view showing a printed wiring board on which a conventional bare IC chip is mounted.
- FIG. 3 is a perspective view showing a conventional multichip module.
- FIG. 4 is an enlarged view showing a main part of a printed wiring board and a dam frame of the multi-chip module shown in FIG.
- FIG. 5 is a manufacturing process diagram of the multi-chip module shown in FIG.
- FIG. 6 is a cross-sectional view showing a state in which the multichip module shown in FIG. 1 is mounted.
- FIG. 7 is an exploded perspective view showing the multichip module of the first embodiment of the present invention.
- FIG. 8 is a perspective view showing an assembled state of the multichip module shown in FIG.
- FIG. 9 is a perspective view showing a state in which the multichip module of FIG. 8 is mounted on a main printed wiring board.
- FIG. 10 is a cross-sectional view showing a main part of the multichip module of FIG.
- FIG. 11 is a perspective view showing a multichip module according to a second embodiment of the present invention.
- FIG. 12 is a perspective view showing a printed wiring board in the multichip module of FIG.
- Fig. 13 is a perspective view showing the printed wiring board shown in Fig. 12 from the back.
- FIG. 14 is a plan view showing the printed wiring board of FIG.
- FIG. 15 is a perspective view showing a dam frame in the multi-chip module of FIG.
- FIG. 16 is a perspective view showing a printed wiring board with a dam frame.
- FIG. 17 is a perspective view showing a state in which a bare IC chip is mounted on a printed wiring board with a dam frame.
- FIG. 18 is a manufacturing process diagram of a printed wiring board with a dam frame.
- FIG. 19 is a mounting process diagram of the bare IC chip.
- FIG. 20 is a sectional view showing a state in which the multichip module of FIG. 17 is mounted.
- FIG. 21 is a cutaway perspective view showing a printed wiring board of a multichip module according to a third embodiment of the present invention.
- FIG. 22 is an enlarged view showing a main part of the printed wiring board of FIG.
- FIG. 23 is an enlarged view showing a main part of the printed wiring board of FIG.
- FIG. 24 is an exploded perspective view showing a multichip module according to a fourth embodiment of the present invention.
- FIG. 25 is a perspective view showing an assembled state of the multi-chip module of FIG.
- FIG. 26 is a perspective view showing a state where the multichip module of FIG. 25 is mounted on a main printed wiring board.
- FIG. 27 is a perspective view showing a modification of the external electrode pad.
- FIG. 28 is a modified example of the embodiment, and is a cross-sectional view showing a state in which the multichip module is attached to the main printed wiring board.
- FIG. 29 is a modified example of the embodiment and is a cross-sectional view showing an arrangement state of a multi-chip module.
- FIG. 30 is a modified example of the embodiment, and is a perspective view showing a state in which a multi-chip module is arranged on a flexible wiring board.
- FIG. 31 is a modified example of the embodiment, and is a perspective view showing a state where a bare IC chip is covered with a conductive member cover and electromagnetically shielded.
- FIG. 32 is a perspective view showing a modified example of the embodiment, in which the entire multi-chip module is covered with a conductive member cover and electromagnetically shielded.
- FIGS. 7 to 26 a multichip module according to a preferred embodiment of the present invention will be described with reference to FIGS. 7 to 26.
- FIG. 7 is an exploded perspective view showing the configuration of the first embodiment of the multichip module of the present invention
- FIG. 8 is a perspective view of the first embodiment
- FIG. 9 is a perspective view of a multi-chip module mounted on a main printed wiring board
- FIG. 10 is a cross-sectional view of a main part of the multi-chip module.
- the multi-chip module 5A of the first embodiment is, for example, a multilayer printed wiring board configured by combining or combining ceramic materials, glass epoxy materials, and resin materials. 100, and three types of bare IC chips 201, 202, and 203 mounted on the printed wiring board 1 ⁇ 0.
- the bare IC chip 201 is mounted in the area 101 indicated by a dashed line on the surface of the printed wiring board 100, and the bare IC chip 202 is located at a point on the surface of the printed wiring board 1-0. It is mounted in the area 1 ⁇ 2 indicated by the dashed line.
- the bare IC chip 2 ⁇ 3 is the area indicated by the solid line on the surface of the printed wiring board 100. Implemented in region 103.
- This external electrode pad 105 has a so-called through-hole cut in half vertically (through direction), and is provided around the conductor layer portion 105 a and the conductor layer portion 1 ⁇ 5 a. Conductor layer portion 105b.
- a large number of lead pads 107 for wire bonding are arranged on the surface of the printed wiring board 100 so as to surround the regions 101 to 103.
- a circuit pattern 109 formed on the surface of the printed wiring board 100 and a printed wiring board 1 ⁇ 0 are formed between the lead pad 107 and the external electrode pad 105.
- the through-holes 1 1 1 and 1 2 are connected via an interstitial via hole 1 1 2.
- the circuit pattern 109 on the surface of the printed wiring board 1 ⁇ 0 and the conductor layer of the inner layer 116 are connected by an interstitial via hole 112.
- the interstitial via hole 112 does not penetrate to the back side of the printed wiring board 10 ⁇ , and when the multi-chip module 5A is mounted on the main printed wiring board 1 in a later process. No short circuit occurs between the conductor on the main printed wiring board 1 side.
- the circuit pattern 109 on the surface of the printed wiring board 100 is provided up to the inside of the areas 101 and 102, and other areas of the printed wiring board 100 are provided in this area.
- solder-resist (Insulating layer) 1 15 is provided.
- an island formed of a conductor layer is provided on a printed wiring board, and the bare IC chip is mounted on this island by die bonding.
- the base IC chips 2 ⁇ 1, 202 which do not necessarily need to secure the ground potential on the printed wiring board 10 ⁇
- the circuit pattern 109 is provided in the part.
- the number of circuit patterns 109 that need to be arranged around the bare IC chips 201 to 203 is reduced. That is, the mounting area of the printed wiring board 100 is reduced, so that the size is reduced.
- Silver paste is applied to each of the regions 1 1 to 1 3 of the printed wiring board 100, and the bare IC chips 201 to 203 are die-bonded. Then, as shown in Fig. 8, the lead pad 1 ⁇ 7 of the printed wiring board 1 ⁇ 0 and the electrodes of the bare IC chip 2 ⁇ 1-2 ⁇ 3, and the lead 2 ⁇ 5 to the wire 208 Then, the multi-chip module 5A is completed by wire bonding.
- the multi-chip module 5A was subjected to a function test using the external electrode pad 105, and only a good multi-chip module 5A was mounted on the main printed wiring board 1 as shown in Fig. 9. it can.
- the external electrode pads 105 formed on the outer peripheral surface of the printed wiring board 100 are soldered to the main printed wiring board 1, so that The mounting area (area) of the multi-chip module required on the printed wiring board 1 side should have a space of about 10 ⁇ area of the printed wiring board.
- FIG. 11 is a perspective view showing the configuration of the second embodiment
- FIG. 12 is a perspective view of a printed wiring board.
- FIG. 13 is a perspective view showing the printed wiring board from the back
- FIG. 14 is a plan view of the printed wiring board.
- FIG. 15 is a perspective view of a dam frame
- FIG. 16 is a perspective view of a printed wiring board with a dam frame.
- FIG. 17 is a perspective view showing a state in which a bare IC chip is mounted on a printed wiring board with a dam frame
- FIG. 18 is a manufacturing process diagram of the printed wiring board with a dam frame.
- FIG. 19 is a mounting process diagram of a bare IC chip
- FIG. 20 is a cross-sectional view showing mounting of a multi-chip module using a vacuum suction device.
- the multi-chip module 5B of the second embodiment has three types of bare IC chips 201 to 2 mounted on a multilayer printed wiring board 10OA.
- a dam frame 222 for sealing the resin is provided on the printed wiring board 10 OA so as to surround the bare IC chip 203 and the bare IC chips 201 to 203.
- This dam frame 22 ° is filled with a resin 23 ° for sealing the chips 23 ⁇ 2 ° 3.
- the structure of the printed wiring board 10 ° A is the same as that of the printed wiring board 10 ⁇ 0 of the first embodiment.
- a large number of external electrode pads 105 are provided on the outer peripheral surface of the printed wiring board 10OA in the shape of a through hole cut in half vertically. I have. Also, on the surface of the printed wiring board 100A, a number of lead pads for wire bonding are formed so as to surround the mounting area 101 to 103 of the bare IC chips 201 to 203. 107 is provided.
- solder resists 115 serving as insulating layers are formed so as to cover areas other than the external electrode pad 105, the lead pad 107 and the region 103. Are formed.
- the solder register 115 is also provided between the external electrode pads 105 to prevent the occurrence of solder bridges between the external electrode pads 105. I have.
- the resin sealing dam frame 220 has a square shape large enough to surround the entire bare IC chip 201 to 203.
- a reinforcing portion 221 is provided so that thermal distortion does not occur in the printed wiring board 10 ° A at the time of resin sealing and reflow soldering. That is, it is divided into two parts.
- an adhesive is applied to a predetermined portion of the printed wiring board 10OA, and the mounting to the adhesive is performed using an automatic machine.
- this adhesive is applied to two external electrode pads (gold) 105 at diagonal positions (circles A and B) on the printed wiring board 10 OA, The border between this solder pad and the solder resist ( ⁇ ) adjacent to this pad 105 The difference is identified by an optical reader, and the boundary between the two is used as a reference position and applied to a predetermined portion of the printed wiring board 10 OA.
- the external electrode pad 105 is made of gold, and the solder resist 115 has a color (for example, green) that is easier to recognize than the printed wiring board 10 OA substrate (usually translucent). Therefore, the two boundaries can be accurately identified by the optical reader.
- the dam frame 220 is placed at a predetermined position where the adhesive of the printed wiring board 10 OA is applied, using the above two boundary portions as reference positions, and the adhesive is cured to form the dam frame 220. Fix it to the printed wiring board 10 OA (Fig. 16).
- the positioning of the dam frame 220 optically identifies the boundary between the external electrode pad 105 and the solder resist 115 based on the color difference, and uses this boundary as a reference. This is done as a position. In this case, it is not necessary to form and arrange a conventional positioning hole in the printed wiring board 1 • 0 A, and the processing step is facilitated.
- the bare IC chip mounting process is as follows: first, a silver paste is applied to the printed wiring board 1 After bonding, the lead pad 107 of the printed wiring board 10 ° A and the electrode pads of the bare chips 2 ⁇ 1 to 203 are wire-bonded with the wire 208 (Fig. 17). ). Then, the resin 230 is filled into the dam frame 220, and the bare IC chips 201 to 203 are sealed with the resin (FIG. 11). After curing, the function test is performed. Also, in the multi-chip module 5B of the second embodiment, FIG.
- a process is adopted in which the portion surrounded by the dam frame 220 is suctioned using the vacuum suction device 7 and mounted on the main printed wiring board 1.
- the dam frame 220 since the dam frame 220 has a size surrounding the three bare IC chips 201 to 203, a sufficient suction area can be secured.
- the resin 230 is filled so that the upper surface thereof is equal to or slightly lower than the upper end surface of the dam frame and maintains a predetermined flatness, the multi-chip module using the adsorber 7 is used. 5 B can be easily and reliably adsorbed.
- a dam frame 220 is provided and filled with a resin 23 ° for sealing the chips 201 to 230. Therefore, another bare IC chip 201 to 203 can be arranged on the dam frame 220 and the resin 230.
- a more versatile multi-chip module can be configured by the stacked bay IC chips 2 ⁇ 1-2 ° 3.
- the heat radiation of the bare IC chips 210 to 203 can be increased. it can.
- the bare IC chips 201 to 203 can efficiently emit heat when performing power amplification or the like.
- the area of the dam frame is increased by extending the dam frame 220 to the resin 230, the heat radiation area is increased, and heat is more efficiently radiated.
- FIG. 21 is a partially cutaway perspective view of a printed wiring board according to the third embodiment
- FIG. 22 is a cross-sectional view of a resistance element portion of the printed wiring board of FIG. Fig. 17 shows the capacitor of the printed wiring board in Fig. 21. It is sectional drawing.
- the multi-chip module according to the third embodiment includes a resistor element and a capacitor for signal adjustment with another multi-chip module mounted on the main printed wiring board 1 by using the multi-chip module according to the first or second embodiment. It is designed to be incorporated into modules 5A and 5B. Therefore, the printed wiring board 1 • 0B is formed by laminating substrates 118 made of ceramic material, glass epoxy material, resin material, and other materials.
- a large number of external electrode pads 1 ⁇ 5 each having a through hole cut in half vertically are provided on the outer peripheral surface.
- a large number of lead pads 107 are provided on the surface so as to surround the mounting area of the bare IC chips 201 to 203.
- a circuit pattern 109 provided on the surface of the printed wiring board 1 ⁇ 0B, a through-through hole 111, an interface They are connected by one stationary via hole 112 and a conductor layer 119 provided in the inner layer.
- a resistive element 121 and a capacitor 122 are formed inside the printed wiring board 100B.
- the resistive element 122 is formed by forming a resistive element 124 on a substrate 118 by screen printing or the like. 1 1 9 connected.
- the capacitor 122 prints a dielectric layer 126 on one conductor layer 119, and forms one conductor layer 119 and the other conductor layer 112 as shown in FIG.
- the substrate 9 is formed by laminating the substrates 118 so as to sandwich the dielectric layer 126 between them. Note that the conductor layer 119 connected to the resistor 122 and the capacitor 122 is an interface.
- an Ag—Pd-based paste or a Rh oxide-based paste is used as the resistance element 124, and a barium titanate crystallized glass material or the like is used as the dielectric layer 126.
- the resistive element 121 and the capacitor 122 are arranged in the printed wiring board 100B, the resistive element and the capacitor can be formed without increasing the size of the multi-chip module. It can be incorporated into a multichip module.
- FIG. 24 is an exploded perspective view showing the configuration of the fourth embodiment
- FIG. 25 is a perspective view of a multichip module
- FIG. 26 is a perspective view of a multi-chip module mounted on a main printed wiring board.
- a plurality of bare IC chips are surface-mounted on a printed wiring board by flip chip bonding.
- the multi-chip module 5D includes a multilayer printed wiring board 100D and three types of bare IC chips 201D and 202 mounted on the printed wiring board 100D. D, 2 ⁇ 3D.
- the bare IC chips 201D to 203D are surface-mounted on regions 101D, 102D, and 103D indicated by dashed lines on the surface of the printed wiring board 100D, respectively.
- a number of external electrode pads 1 ⁇ 5 soldered to the main printed wiring board 1 shown in Fig. 26 are provided on the outer peripheral surface of the printed wiring board 10 ⁇ D.
- a number of pads 131 for flip-chip bonding are provided in regions 101D to 103D.
- the circuit pattern 109, the printed resistive element 133, the printed dielectric 134, and the printed circuit board 100D provided on the surface of the printed circuit board 100D are provided between the pad 131 and the external electrode pad 1 ° 5. Are connected by the through hole 1 1 1 and the interstitial via hole 1 1 2.
- the circuit pattern 109 on the printed wiring board 1 ⁇ 0 D and the inner layer conductor are connected to each other by the interstitial via holes 112 so that the printed wiring board 100 The number of circuit patterns that need to be arranged on the surface of D is reduced.
- the area immediately below the flip-chip bonded base IC chips 201D to 203D, that is, the area A printed resistive element 133 and a printed dielectric 134 are provided in the portions 101D to 103D.
- the multichip module can be further downsized.
- the surface of the printed wiring board 100D is provided with a flip-chip bonding pad 131 and an external electrode pad 105. Except for the portion, a solder resist 115 is provided.
- a print resistor element 136 for trimming On the surface of the printed wiring board 1 ⁇ D, outside the areas 101D to 1 ⁇ 3D, there are provided a print resistor element 136 for trimming and a print derivative 137 for trimming. Have been. Especially high frequencies In the high-frequency circuit handled, when a resistive element or dielectric is formed by printing, fine adjustments such as setting the tuning frequency to a predetermined center frequency and matching the characteristic impedance are required. When the printed dielectric is formed in the inner layer or below the bare IC chip, fine adjustment cannot be performed. A printed dielectric material 137 is provided on the surface of the printed wiring board 100D.
- the above printed wiring board 100 D area 1 0 1 D to 103 D pad 1 3 1 bears a bare IC chip 2 ⁇ 1 D to 203 D by flip chip bonding method As a result, a multi-chip module 5D is formed.
- this flip chip bonding method there is no need to provide a bonding pad around the bare IC chip, so the multi-chip module can be smaller than the bonding method.
- the multi-chip module 5D was subjected to a function test using the external electrodes 105 in the same manner as the multi-chip module 5A in the first embodiment, and then, as shown in FIG. Then, only the good multi-chip module 5D is mounted on the main printed wiring board 1.
- the base for mounting this multi-chip module 5D on the surface is also soldered to the main printed wiring board 1 because the external electrodes 105 formed on the outer peripheral surface of the printed wiring board 100D are soldered.
- the mounting area of the multi-chip module required on the side of the main printed wiring board 1 should secure a space of about 1 ⁇ 0 D area of the printed wiring board. To.
- the printing resistor element and the printing in the third embodiment and the fourth embodiment together with the dielectric (capacitor), it is possible to form a printed conductor that is an inductor.
- an oscillation circuit / tuning circuit for processing a high frequency signal can be configured.
- the external electrode pad 105 has a shape in which the through hole is cut in half lengthwise (through direction). However, as shown in FIG. In addition, a through hole 106a may be provided in its place, and this through hole may be used as an external electrode pad. In this case, when the printed circuit board 100 has a structure in which the outer periphery may come into contact with the metal member, short circuit (contact) can be prevented. The same applies to the second to fourth embodiments.
- the land part of the external electrode pad is replaced with a printed wiring board 100 0 as shown in FIG.
- a pattern 106 b extending to the outer periphery of the printed circuit board may be provided, and each pattern 106 b may be connected to the main printed wiring board (another printed wiring board) 1. . This stage also simplifies the preparation process.
- the multi-chip module is arranged parallel to the main printed wiring board (other printed wiring board) 1, but as shown in FIG. May be arranged and connected.
- two main printed wiring boards (other printed wiring boards) 1 arranged in parallel may be arranged vertically.
- the degree of freedom of the arrangement is obtained.
- the thickness of the main printed wiring board 1 can be reduced.
- a bare IC chip may be provided in a printed wiring board with a through-hole or a recess formed therein and fitted into the through-hole or the recess. The same applies to the second to fourth embodiments. In this case, the thickness can be reduced.
- the multi-chip module is formed by connecting the lead pad 107 of the printed wiring board 100 and the electrode pad 205 of the bare IC chips 201 to 203 with the wire 208. Bonding is performed, but depending on the electrical configuration, the lead pad 107 is not provided, and the electrode pad 205 of the bare IC chip 201 to 203 is connected to the wire 208.
- the external electrode pads 1 0 5 which may c this so as to directly connect the case to the configuration of the print wiring board 1 0 0 is simplified. The same applies to the third embodiment to the fourth embodiment.
- the flexible printed circuit board F when used for the main printed circuit board 1, a three-dimensional arrangement of the multi-chip module becomes possible.
- the bare IC chip can be covered with a cover Sa made of a conductive member (metal, conductive resin) and electromagnetically shielded.
- the multi-chip module may be covered with a cover Sb of a conductive member (metal, conductive resin) to electromagnetically shield the entire multi-chip module.
- the multi-chip module of the twenty-eighth invention has a shape in which a through hole for soldering to another printed wiring board on which the multi-chip module is arranged is cut in half lengthwise or an external electrode pad of the through hole, and the like.
- the external electrode pad extends and is arranged on the outer peripheral surface of the printed wiring board, and the bare IC chip is directly connected to the external electrode pad by wire bonding. This eliminates the need for a lead terminal on the periphery of the printed wiring board as in conventional multi-chip modules, and improves the mounting density of electronic components on other printed wiring boards.
- a circuit pattern is provided on the bottom side of the bare IC chip on the surface of the printed wiring board. As a result, the number of circuit patterns required around the bare IC chip is reduced, and the printed wiring board can be reduced in size accordingly.
- the lead terminals are provided in the same manner as the multi-chip modules according to the first and second aspects. There is no need to provide them, and the number of circuit patterns that need to be provided around the bare IC chip is reduced.
- a resistor is provided on the surface of the printed wiring board and on the bottom side of the bare IC chip. Chip resistors and chip capacitors around the bare IC chip to form elements, capacitors, and inductors. This eliminates the need to provide sensors and inductors, and has the effect of reducing the size of the printed wiring board.
- the multi-chip module includes a ceramic material, a glass epoxy material, a resin material, or a combination of multiple layers.
- a plurality of bare IC chips are electrically connected to each other through a conductor layer provided in an inner layer of the printed wiring board and an interstitial via hole. This has the effect of reducing the number of circuit patterns that need to be provided around the bay IC chip and reducing the size of the printed wiring board accordingly.
- the resistive element can be formed in the inner layer of the printed wiring board, it is not necessary to provide the chip resistive element on the surface of the printed wiring board, and the printed circuit is accordingly reduced. This has the effect that the wiring board can be reduced in size.
- the capacitor is formed on the inner layer of the printed wiring board, and it is not necessary to provide a chip capacitor on the surface of the printed wiring board. This has the effect of reducing the size of the printed wiring board by a corresponding amount.
- the resistive element, the capacitor, and the inductor are formed in the inner layer of the printed wiring board, the chip resistor is provided on the surface of the printed wiring board. There is no need to provide elements, chip capacitors, and inductors, and this has the effect of reducing the size of the printed wiring board by that much.
- a printable resistive element In the multi-chip module according to the fourteenth, sixteenth, and twenty-ninth inventions, a printable resistive element, a printed dielectric, and a printed inductor that can be trimmed are provided, and any one of the first to the thirteenth is provided.
- a single dam frame surrounds a plurality of bare IC chips, and there is no need to provide a dam frame for each bare IC chip. This has the effect that the area to be closed can be reduced, and the work of sucking and transporting the upper surface of the dam frame with a vacuum suction device can be performed easily and reliably.
- the multi-chip module according to the seventeenth aspect of the present invention has the same effect as the fifteenth or sixteenth aspect, but also has a reinforcing portion provided on the dam frame, so that thermal distortion during resin sealing and reflow soldering can be reduced, and Has the effect that it can be easily performed.
- the dam frame is attached to the printed wiring board based on the boundary between the electrode pad and the periphery of the electrode pad, so that any one of the fifteenth to seventeenth aspects is provided.
- the boundary between the solder resist provided adjacent to the electrode pad and the electrode pad to prevent a solder bridge between the electrode pads is used as the reference position for mounting the dam frame.
- the boundary part becomes color difference and clear, the identification when the optical identification device is used is surely performed, and the working efficiency is improved.
- the portion surrounded by the dam frame of the multi-chip module is vacuum-adsorbed. It has the effect of being able to be easily absorbed by a vessel and improving the work efficiency.
- the bare IC chip is mounted on the printed wiring board by flip chip bonding, so that the surface of the printed wiring board is bonded around the bare IC chip. There is no need to provide a pad for use with the printed wiring board, and the printed wiring board can be reduced in size accordingly.
- the multi-chip module since the multi-chip module is arranged in a state parallel or perpendicular to another printed wiring board, there is an effect that a degree of freedom in arrangement can be obtained.
- the bare IC chip is filled in the dam frame with resin and sealed, and the bare IC chip is further disposed on the dam frame and the resin. It is possible to arrange more components, and it has the effect that the degree of freedom of the circuit configuration and the more complicated configuration become possible.
- the bare IC chip is arranged in the through hole or the concave portion of the printed wiring board and connected by wire bonding.
- the bare IC chip is arranged in the through hole or the concave portion of the printed wiring board and connected by wire bonding.
- the multi-chip module of the third invention since the multi-chip module is arranged on the flexible wiring board, the three-dimensional
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
- Combinations Of Printed Boards (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/617,843 US6147876A (en) | 1993-09-14 | 1994-09-14 | Multi-chip module having printed wiring board comprising circuit pattern for IC chip |
DE69434952T DE69434952D1 (de) | 1993-09-14 | 1994-09-14 | Viel-chip-modul |
CA002171458A CA2171458C (en) | 1993-09-14 | 1994-09-14 | Multi-chip module |
AU76650/94A AU690920B2 (en) | 1993-09-14 | 1994-09-14 | Multi-chip module |
EP94927045A EP0720232B1 (en) | 1993-09-14 | 1994-09-14 | Multi-chip module |
FI961176A FI961176A0 (fi) | 1993-09-14 | 1996-03-13 | Monisiruinen moduuli |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22864493 | 1993-09-14 | ||
JP5/228644 | 1993-09-14 | ||
JP6/191455 | 1994-08-15 | ||
JP19145594A JP3461204B2 (ja) | 1993-09-14 | 1994-08-15 | マルチチップモジュール |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/636,714 Division US6418030B1 (en) | 1993-09-14 | 2000-08-11 | Multi-chip module |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995008189A1 true WO1995008189A1 (en) | 1995-03-23 |
Family
ID=26506700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/001517 WO1995008189A1 (en) | 1993-09-14 | 1994-09-14 | Multi-chip module |
Country Status (9)
Country | Link |
---|---|
US (2) | US6147876A (ja) |
EP (1) | EP0720232B1 (ja) |
JP (1) | JP3461204B2 (ja) |
CN (6) | CN1041035C (ja) |
AU (1) | AU690920B2 (ja) |
CA (1) | CA2171458C (ja) |
DE (1) | DE69434952D1 (ja) |
FI (1) | FI961176A0 (ja) |
WO (1) | WO1995008189A1 (ja) |
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WO1998007193A1 (de) * | 1996-08-09 | 1998-02-19 | Robert Bosch Gmbh | Multichipmodul |
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- 1994-09-14 WO PCT/JP1994/001517 patent/WO1995008189A1/ja active IP Right Grant
- 1994-09-14 CN CN94193352A patent/CN1041035C/zh not_active Expired - Fee Related
- 1994-09-14 CA CA002171458A patent/CA2171458C/en not_active Expired - Fee Related
- 1994-09-14 EP EP94927045A patent/EP0720232B1/en not_active Expired - Lifetime
- 1994-09-14 AU AU76650/94A patent/AU690920B2/en not_active Ceased
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1998
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- 1998-04-27 CN CN98107886A patent/CN1214547A/zh active Pending
- 1998-04-27 CN CN98107887A patent/CN1198593A/zh active Pending
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2000
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WO1998007193A1 (de) * | 1996-08-09 | 1998-02-19 | Robert Bosch Gmbh | Multichipmodul |
US5953213A (en) * | 1996-08-09 | 1999-09-14 | Robert Bosch Gmbh | Multichip module |
Also Published As
Publication number | Publication date |
---|---|
EP0720232A4 (en) | 1996-11-13 |
CN1198594A (zh) | 1998-11-11 |
CN1130958A (zh) | 1996-09-11 |
EP0720232A1 (en) | 1996-07-03 |
AU690920B2 (en) | 1998-05-07 |
CN1203454A (zh) | 1998-12-30 |
CN1198593A (zh) | 1998-11-11 |
AU7665094A (en) | 1995-04-03 |
US6418030B1 (en) | 2002-07-09 |
DE69434952D1 (de) | 2007-05-24 |
FI961176L (fi) | 1996-03-13 |
CN1214548A (zh) | 1999-04-21 |
FI961176A0 (fi) | 1996-03-13 |
US6147876A (en) | 2000-11-14 |
JPH07135290A (ja) | 1995-05-23 |
EP0720232B1 (en) | 2007-04-11 |
CA2171458C (en) | 2001-11-27 |
CA2171458A1 (en) | 1995-03-23 |
CN1041035C (zh) | 1998-12-02 |
JP3461204B2 (ja) | 2003-10-27 |
CN1214547A (zh) | 1999-04-21 |
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