Source: https://patents.google.com/patent/JP2010129797A/en
Timestamp: 2020-03-30 23:52:38
Document Index: 686026678

Matched Legal Cases: ['art 50', 'art, 11', 'art, 11', 'art, 20', 'art, 20', 'art,\n80']

JP2010129797A - Semiconductor device for power - Google Patents
Semiconductor device for power Download PDF
JP2010129797A
JP2010129797A JP2008303333A JP2008303333A JP2010129797A JP 2010129797 A JP2010129797 A JP 2010129797A JP 2008303333 A JP2008303333 A JP 2008303333A JP 2008303333 A JP2008303333 A JP 2008303333A JP 2010129797 A JP2010129797 A JP 2010129797A
JP2008303333A
JP4607995B2 (en
2008-11-28 Application filed by Mitsubishi Electric Corp, 三菱電機株式会社 filed Critical Mitsubishi Electric Corp
2008-11-28 Priority to JP2008303333A priority Critical patent/JP4607995B2/en
2010-06-10 Publication of JP2010129797A publication Critical patent/JP2010129797A/en
2011-01-05 Publication of JP4607995B2 publication Critical patent/JP4607995B2/en
An object of the present invention is to provide a power semiconductor device using a power semiconductor module sealed with a resin by a transfer mold and capable of realizing an improvement in productivity and a reduction in cost by downsizing and simplification of wiring.
A power semiconductor module having a cylindrical conductive body bonded substantially perpendicular to a wiring pattern and having an opening exposed on the surface of a transfer mold resin, a ceiling portion and a peripheral wall portion, and is fitted into the ceiling portion. An insert case provided with an external terminal having a connection portion on the outer surface side and the inner surface side of the ceiling portion, and the power semiconductor module is inserted into the insert case by inserting the inner surface side connection portion of the external terminal into the cylindrical conductor. It is set.
The present invention relates to a power semiconductor device using a power semiconductor module, and more particularly to a power semiconductor device that can be miniaturized and has excellent productivity.
A power semiconductor device is required to be small and have a large current. As one means for increasing the current, a method is adopted in which power semiconductor modules having the same capacity are wired in parallel to increase the current.
As a means for reducing the size of the power semiconductor device, there is a method of using a power semiconductor module sealed with transfer mold resin. Among power semiconductor modules sealed with this transfer mold resin, as a power semiconductor module that can be particularly miniaturized, a power semiconductor element is mounted on a circuit pattern of a circuit board, and for connection to an external wiring. Some terminals are provided by being joined substantially perpendicularly to the surface of the circuit pattern, and the terminals are exposed on the surface of the transfer mold resin.
For the terminals of the power semiconductor module, a copper block, a cylinder with a screw hole, and a resin-molded nut are used. The connection to the external wiring is made by solder at the terminal of the copper block, and is made by bolt at the terminal in which the cylinder with the screw hole and the nut are resin-molded (for example, see Patent Document 1).
JP 2007-184315 A (7th page, 8th page, FIG. 2 and FIG. 3)
In order to increase the current, when the power semiconductor modules described in Patent Document 1 are wired in parallel, the wiring members between the power semiconductor modules are connected by solder connection or bolt connection. It is necessary to sequentially connect the wiring members for each of them, and also in each power semiconductor module, it is necessary to connect the wiring members for each of the plurality of terminals provided.
That is, each power semiconductor module is connected to each unit, and since a plurality of terminals are connected one by one, the number of connection wiring members increases, the connection process becomes complicated, and the number of connection processes also increases. However, there is a problem that the productivity of the power semiconductor device is lowered and the cost is increased. In addition, a space between the power semiconductor modules is required to perform the wiring member connection work, and there is a problem that the power semiconductor device becomes large because the space between the power semiconductor modules becomes wide.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power semiconductor device using a power semiconductor module sealed with a transfer mold with a resin. The object is to provide a power semiconductor device capable of realizing productivity improvement and cost reduction by simplification.
A power semiconductor device according to the present invention is a power semiconductor device including a power semiconductor module sealed with a transfer mold resin, and an insert case for setting the power semiconductor module. The power semiconductor element is mounted on the wiring pattern of the circuit board, the cylindrical conductor having an opening is joined to the wiring pattern substantially vertically, the opening is exposed on the surface of the transfer mold resin, and the insert case is And an external terminal having a ceiling portion and a peripheral wall portion, the portion facing the ceiling portion being open, being fitted in the ceiling portion and having connecting portions on the outer surface side and the inner surface side of the ceiling portion, and The inner surface side connection portion of the external terminal is inserted into the conductive body, and the power semiconductor module is set in the insert case.
A power semiconductor device according to the present invention is a power semiconductor device including a power semiconductor module sealed with a transfer mold resin, and an insert case for setting the power semiconductor module. The power semiconductor element is mounted on the wiring pattern of the circuit board, the cylindrical conductor having an opening is joined to the wiring pattern substantially vertically, the opening is exposed on the surface of the transfer mold resin, and the insert case is And an external terminal having a ceiling portion and a peripheral wall portion, the portion facing the ceiling portion being open, being fitted in the ceiling portion and having connecting portions on the outer surface side and the inner surface side of the ceiling portion, and A power semiconductor module is set in the insert case by inserting the inner terminal side connection part of the external terminal into the conductor and can be downsized and simplified in wiring A.
FIG. 1 is a schematic cross-sectional view of a power semiconductor device according to Embodiment 1 of the present invention.
As shown in FIG. 1, in the power semiconductor device 100 of the present embodiment, the power semiconductor module 80 is set in the insert case 20, and the external terminal 9 provided on the insert case 20 is disposed on the inner surface side of the insert case 20. The protruding portion is inserted and connected to the cylindrical conductive body 1 having an opening on a surface (referred to as an upper surface) facing the inner surface of the insert case 20 of the power semiconductor module 80.
FIG. 2 is a schematic perspective view (a) of a power semiconductor module used in the power semiconductor device according to the first embodiment of the present invention, and a schematic cross-sectional view (b) showing the arrangement of members.
As shown in FIG. 2A, the power semiconductor module 80 used in the present embodiment is sealed with a transfer mold resin 2 that is excellent in reliability, and the upper surface of the cylindrical conductor 1 is formed on the upper surface thereof. The opening is exposed.
As shown in FIG. 2B, the power semiconductor module 80 used in the present embodiment includes a wiring pattern 3c via a metal base plate 3a which is a circuit board and an insulating sheet 3b which is a high thermal conductive insulating layer. The power semiconductor element 5 is connected to the metal circuit board 3 on which is formed by a conductive adhesive such as solder, and wiring is formed by wire bonding. Further, the cylindrical conductor 1 is connected to the wiring pattern 3c substantially perpendicularly to the surface of the wiring pattern 3c.
The metal circuit board 3, the power semiconductor element 5, the wire bond, and the cylindrical conductor 1 are sealed with the transfer mold resin 2, but opposite to the surface on which the circuit pattern of the metal base plate 3a is provided. The side surface and the opening of the cylindrical conductor 1 are exposed from the transfer mold resin 2.
In this embodiment, the metal circuit board 3 is used as the circuit board. However, instead of the metal circuit board, a ceramic circuit board or a board having a shape in which the ceramic circuit board and the metal base plate are joined by solder may be used.
FIG. 3 is a schematic perspective view (a) and a schematic cross-sectional view (b) of an insert case used in the power semiconductor device according to the first embodiment of the present invention.
As shown in FIG. 3, in the insert case 20 used in the present embodiment, when the power semiconductor module 80 is set, a portion (referred to as a ceiling portion) 20 a facing the upper surface of the power semiconductor module 80 and And a peripheral wall portion 20b surrounding the peripheral side portion of the power semiconductor module 80, and the opposite side of the ceiling portion 20a is open. A flange portion 20c is provided on the opening side of the pair of opposed peripheral wall portions 20b, and a through hole 7 is formed in the flange portion 20c. The through hole 7 is used for fixing the power semiconductor module 80 to a cooling fin (not shown).
A rib 8 is formed on the inner surface side of the peripheral wall portion 20b of the insert case 20.
Two types of external terminals are provided on the ceiling portion 20 a of the insert case 20. One of them is that the connecting portion exposed on the outer surface side of the ceiling portion 20a (referred to as an outer surface side connecting portion) has a screw structure, and the connecting portion protruding to the inner surface side of the ceiling portion 20a (referred to as an inner surface side connecting portion) is pressed. It is the 1st external terminal 10 which is a fitting structure. The other is the second external terminal 11 in which the outer surface side connection portion of the ceiling portion 20a has a bar structure and the inner surface side connection portion of the ceiling portion 20a has a press fit structure. A nut embedded in the ceiling portion 20a of the insert case 20 is used for the screw structure portion of the first external terminal 10, and the size of the nut is appropriately determined depending on the current capacity.
In the present embodiment, the insert case 20 is formed by a resin injection molding method, and the first and second external terminals 10 and 11 are collectively provided on the ceiling portion 20 a of the insert case 20. The insert case 20 is preferably made of PPS (polyphenylene sulfide), PBT (polybutylene terephthalate), or the like, which is a thermoplastic resin, but is not limited as long as it is a resin material that can be injection-molded.
The position of the through hole 7 for fixing the cooling fin of the flange portion 20c in the insert case 20 is a portion where the pressure applied to the power semiconductor module 80 from the cooling fin is the largest. The through hole 7 may be a hole of the thermoplastic resin itself, but it is desirable to insert a metal cylinder into the hole in order to obtain a larger fastening strength.
FIG. 4 is a diagram illustrating a state in which the power semiconductor module is set in the insert case in the power semiconductor device according to the first embodiment of the present invention.
As shown in FIG. 4, when the power semiconductor module 80 is set in the insert case 20, the press-fit structure portion 10 b that is the inner surface side connection portion of the first external terminal 10 and the inner surface side connection of the second external terminal 11. The press-fit structure portion 11b, which is a portion, is inserted and connected to the cylindrical conductor 1 of the power semiconductor module 80, and the screw structure portion 10a that is the outer surface side connection portion of the first external terminal 10 and the second external terminal 11 is connected to a predetermined circuit of the power semiconductor module 80 to form the power semiconductor device 100.
In the present embodiment, the first external terminal 10 is used for high current output, and the second external terminal 11 is used for the gate and emitter signals of the power semiconductor module.
In the power semiconductor device 100 of the present embodiment, the screw structure portion 10a of the first external terminal 10 and the rod structure portion 11a of the second external terminal 11 on the outer surface side of the insert case 20 are electrically connected to each other. It becomes a conduction | electrical_connection part with each circuit of the semiconductor module 80 for a circuit.
Therefore, the power semiconductor device 100 can be easily attached to the conductor portion of the bus bar substrate or the plate-like metal conductor, and the wiring process when using a plurality of power semiconductor devices for increasing the capacity can be reduced. The productivity of the power semiconductor device is improved, and the interval between the power semiconductor devices can be reduced, and the size can be reduced. In addition, since wiring between a plurality of power semiconductor devices can be performed with a conductor portion or a plate-like metal conductor, the number of wiring members can be reduced, and the cost can be reduced.
Further, in the power semiconductor device 100 of the present embodiment, since the rib 8 is provided in the insert case 20, the press-fit structure portions 10b and 11b of the first and second external terminals are used as the power semiconductor module. Since the depth inserted into the 80 cylindrical conductors 1 can be kept constant, the external terminals can be fixed with high accuracy, and the connection reliability of the external terminals is improved.
Further, in the power semiconductor device 100 of the present embodiment, since the external terminal of the insert case 20 is press-fitted and set to the cylindrical conductor 1 of the power semiconductor module 80, the connection reliability by a vibration test or the like is soldered. There is an advantage that multiple points can be connected at a time as well as higher than the joining. Moreover, the power semiconductor module 80 can be easily removed, and the repairability is excellent.
FIG. 5 is a schematic perspective view (a) of the power semiconductor device according to the second embodiment of the present invention and a schematic perspective view (b) of the power semiconductor module used in the power semiconductor device.
In the power semiconductor device 200 of the present embodiment, three power semiconductor modules 80 shown in FIG. 5B are set in one insert case 30.
That is, the insert case 30 used in the power semiconductor device 200 of the present embodiment is the same as the insert case of the first embodiment, but has a size that allows three power semiconductor modules 80 to be set simultaneously. . The ceiling portion 30 a is provided with external terminals for three power semiconductor modules 80, which are inserted and connected to the cylindrical conductor 1 provided in each power semiconductor module 80. Yes. The external terminals used in the present embodiment are the first external terminal 10 and the second external terminal 11 similar to those used in the first embodiment.
Since power semiconductor device 200 of the present embodiment has the above-described structure, it has the same effect as power semiconductor device 100 of the first embodiment, and a plurality of power semiconductor modules are arranged closer to each other. Thus, the power semiconductor device can be further miniaturized.
In the present embodiment, the number of power semiconductor modules is three, but any number may be used as long as it can be physically set.
In the present embodiment, the power semiconductor module to be set is the power semiconductor module 80 shown in FIG. 2, but the present invention is not limited to this.
FIG. 6 is a schematic cross-sectional view of an insert case used in the power semiconductor device according to the third embodiment of the present invention.
As shown in FIG. 6, the insert case 40 of the power semiconductor device according to the present embodiment is provided with a plurality of press-fit structure portions 10 b as inner surface side connection portions of the first external terminals 10. The screw structure portion 10a that is the outer surface side connection portion and the plurality of press fit structure portions 10b that are the inner surface side connection portions are connected by an internal wiring 10c that is embedded in the ceiling portion 40a of the insert case 40. .
The second external terminal 11 is also provided with a plurality of press-fit structure portions 11b as inner surface side connection portions. The bar structure portion 11a that is the outer surface side connection portion and the plurality of press fit structure portions 11b that are the inner surface side connection portions are connected by an internal wiring 11c that is embedded in the ceiling portion 40a of the insert case 40. . For the internal wirings 10c and 11c, a copper-based material having excellent electrical conductivity is used.
In the present embodiment, the internal wirings 10 c and 11 c are embedded in the ceiling portion of the insert case 40, but may be provided in contact with the inner surface of the ceiling portion 40 a of the insert case 40.
Also in the present embodiment, the power semiconductor module is set in the insert case 40, and the press-fit structure portion 10 b that is the inner surface side connection portion of the first external terminal 10 and the inner surface side connection portion of the second external terminal 11 are used. A certain press-fit structure portion 11b is inserted and connected to a cylindrical conductor of a power semiconductor module (not shown) to form a power semiconductor device.
The power semiconductor device according to the present embodiment includes a press-fit structure provided in the insert case 40, in which the first external terminal 10 is a plurality of inner surface side connection portions to the screw structure portion 10a which is one outer surface side connection portion. The portion 10b is connected by the internal wiring 10c, and the second external terminal 11 is connected to the rod structure portion 11a which is one outer surface side connection portion and the press fit structure portion 11b which is a plurality of inner surface side connection portions is connected to the internal wiring 11c. Therefore, the external wiring between the first external terminals and the external wiring between the second external terminals outside the insert case 40 become unnecessary.
Therefore, the power semiconductor device according to the present embodiment has the same effects as the power semiconductor device according to the first embodiment, and can further reduce the size of the power semiconductor device and simplify the manufacturing process.
Also in the present embodiment, a plurality of power semiconductor modules may be set in one insert case.
FIG. 7 is a schematic cross-sectional view of an insert case used in the power semiconductor device according to the fourth embodiment of the present invention.
As shown in FIG. 7, in the insert case 50 of the power semiconductor device of the present embodiment, the control printed board 13 is installed inside the insert case 50.
The printed circuit board 13 for control is installed between the ceiling part 50a of the insert case 50 and the formation part of the rib 8, and there is no problem in setting the power semiconductor module.
The control printed circuit board 13 is provided with a plurality of press-fit printed circuit board terminals 13b on the surface facing the power semiconductor module, and these are electrically connected by wiring in the printed wiring board. In addition, it is electrically connected to the inner surface side connection portion of the second external terminal 11 provided on the ceiling portion 50a of the insert case 50. Further, the press-fit structure 10 b of the first external terminal 10 penetrates the control printed board 13.
The control printed circuit board 13 is installed in a mold at the time of molding the insert case and integrated with the molding or in a molded insert case. In terms of cost, a method of fitting in a molded insert case is advantageous. When the control printed circuit board is fitted into the molded insert case, it is connected to the second external terminal 11 with solder or the like after the fitting.
Also in the present embodiment, a power semiconductor module is set in the insert case 50, and a press-fit structure printed board having a press-fit structure 10b that is an inner surface side connection portion of the first external terminal 10 and the control printed board 13 is used. The terminal 13b is inserted and connected to a cylindrical conductor of a power semiconductor module (not shown) to form a power semiconductor device.
In the power semiconductor device of the present embodiment, the control printed circuit board 13 is installed in the insert case 50, and the plurality of printed circuit board terminals 13 b provided on the control printed circuit board 13 are electrically connected to the second external terminal 11. Therefore, external wiring on the outside of the insert case 50 becomes unnecessary.
FIG. 8 is a schematic cross-sectional view of an insert case used in the power semiconductor device according to the fifth embodiment of the present invention.
As shown in FIG. 8, the insert case 60 of the power semiconductor device according to the present embodiment has a rod structure on the outer surface side connection portion of the ceiling portion 60a in all the external terminals 12, and the inner surface side connection portion of the ceiling portion 60a. Is a press-fit structure.
FIG. 9 shows a third external terminal (a), a fourth external terminal (b), a fifth external terminal (c), and a sixth external terminal used in the power semiconductor device according to the fifth embodiment of the present invention. It is a schematic diagram which shows an external terminal (d).
The external terminal 12 used in the power semiconductor device of the present embodiment is such that the outer surface side connection portion of the ceiling portion 60a of the insert case has a third external terminal 12a having a coil spring structure and a plate as shown in FIG. It is one of the fourth external terminal 12b having a spring structure, the fifth external terminal 12c having a solder connection structure, and the sixth external terminal 12d having a press-fit structure.
In this Embodiment, the inner surface side connection part in all the external terminals 12a, 12b, 12c, 12d is a press-fit structure. Examples of the press-fit structure include compliant pins and star pins.
The external terminal used in this embodiment is excellent in electrical conductivity and strength, and needs to have spring elasticity, so a copper alloy is preferably used.
Also in the present embodiment, the power semiconductor module is set in the insert case 60, and the press-fit structure portion that is the inner surface side connection portion of the external terminal 12 is inserted into the cylindrical conductor of the power semiconductor module (not shown). The power semiconductor device is connected.
In the power semiconductor device of the present embodiment, which of the third to sixth external terminals 12a, 12b, 12c, and 12d is used is selected depending on the structure of the connection portion of the external wiring to which the external terminals are connected. .
In the present embodiment, a printed wiring board (not shown) is used for the external wiring connected to the external terminal. For example, the third and fourth external terminals 12a and 12b are used when the external terminal is pressed against the pad portion of the printed wiring board and joined, and soldered and joined to the through hole of the printed wiring board. The fifth external terminal 12c is used, and the sixth external terminal 12d is used for press-fitting and connecting to the through hole of the printed wiring board.
Therefore, in the power semiconductor device using the third and fourth external terminals 12a and 12b, the printed wiring board to be connected can be miniaturized, and the power semiconductor device using the fifth and sixth external terminals 12c and 12d can be used. In the semiconductor device, the current capacity of the printed wiring board to be connected can be increased.
That is, the power semiconductor device of the present embodiment has the same effects as the power semiconductor device of the first embodiment, and can be further miniaturized and simplified in the manufacturing process. In addition, it can be electrically connected to external wirings of various shapes, and is excellent in convenience.
The power semiconductor device according to the present invention is effective for a power semiconductor device that requires a large capacity because an external terminal provided in the insert case is inserted into the cylindrical conductor of the power semiconductor module and connected to the external wiring. Available to:
1 is a schematic cross-sectional view of a power semiconductor device according to a first embodiment of the present invention. It is the perspective schematic diagram (a) of the power semiconductor module used for the power semiconductor device which concerns on Embodiment 1 of this invention, and the cross-sectional schematic diagram (b) which shows arrangement | positioning of a member. They are a perspective schematic diagram (a) and a cross-sectional schematic diagram (b) of an insert case used in the power semiconductor device according to the first embodiment of the present invention. In the power semiconductor device of Embodiment 1 of this invention, it is a figure explaining the state which sets a power semiconductor module to an insert case. It is the perspective schematic diagram (a) of the power semiconductor device which concerns on Embodiment 2 of this invention, and the perspective schematic diagram (b) of the power semiconductor module used for this power semiconductor device. It is a cross-sectional schematic diagram of the insert case used for the power semiconductor device which concerns on Embodiment 3 of this invention. It is a cross-sectional schematic diagram of the insert case used for the power semiconductor device which concerns on Embodiment 4 of this invention. It is a cross-sectional schematic diagram of the insert case used for the power semiconductor device which concerns on Embodiment 5 of this invention. Third external terminal (a), fourth external terminal (b), fifth external terminal (c), and sixth external terminal (d) used in the power semiconductor device according to the fifth embodiment of the present invention. ).
1 cylindrical conductor, 2 transfer mold resin, 3 metal circuit board,
3a metal base plate, 3b insulating sheet, 3c wiring pattern, 5 power semiconductor element, 7 through hole, 8 rib, 9 external terminal, 10 first external terminal, 10a screw structure,
10b Press-fit structure, 10c internal wiring, 11 second external terminal,
11a Bar structure part, 11b Press fit structure part, 11c Internal wiring,
12 external terminal, 12a third external terminal, 12b fourth external terminal,
12c 5th external terminal, 12d 6th external terminal, 13 printed circuit board for control,
13b Printed circuit board terminal, 20, 30, 40, 50, 60 Insert case,
20a, 30a, 40a, 50a, 60a ceiling part, 20b peripheral wall part, 20c collar part,
80 Power semiconductor module, 100, 200 Power semiconductor device.
A power semiconductor device comprising: a power semiconductor module sealed with a transfer mold resin; and an insert case for setting the power semiconductor module, wherein the power semiconductor module has a power applied to a wiring pattern of a circuit board. The semiconductor element for mounting is mounted, a cylindrical conductor having an opening in the wiring pattern is joined substantially vertically, the opening is exposed on the surface of the transfer mold resin, and the insert case is connected to the ceiling portion. An external terminal having a peripheral wall portion, opening in a portion facing the ceiling portion, passing through the ceiling portion and having connecting portions on an outer surface side and an inner surface side of the ceiling portion, and the cylinder A power semiconductor device in which the inner surface side connection portion of the external terminal is inserted into a conductive body, and the power semiconductor module is set in the insert case.
The plurality of inner surface side connection portions are provided in one external terminal, and the plurality of inner surface side connection portions are connected by internal wiring embedded in the ceiling portion of the insert case. Power semiconductor device.
A control printed circuit board is provided in the insert case, the inner surface side connection portion of the external terminal is connected to a surface of the control printed circuit board facing the ceiling portion of the insert case, and the insert of the control printed circuit board is inserted. A plurality of printed circuit board terminals are formed on a surface opposite to a surface facing the ceiling portion of the case, and the inner surface side connection section and the plurality of printed circuit board terminals are connected by wiring of the control printed circuit board, The power semiconductor device according to claim 1, wherein a plurality of printed circuit board terminals are inserted into the cylindrical conductor.
4. The power semiconductor device according to claim 1, wherein a plurality of power semiconductor modules are set in the insert case. 5.
The power semiconductor device according to any one of claims 1 to 4, wherein the inner-surface-side connection portion of the external terminal has a press-fit structure.
6. The power semiconductor device according to claim 1, wherein the outer surface side connection portion of the external terminal has a screw structure.
The power semiconductor device according to any one of claims 1 to 5, wherein the outer surface side connection portion of the external terminal has a spring structure.
The power semiconductor device according to any one of claims 1 to 5, wherein the outer surface side connection portion of the external terminal has a press-fit structure.
The power semiconductor device according to claim 1, wherein a rib is provided on an inner surface of the peripheral wall portion of the insert case.
The power semiconductor according to any one of claims 1 to 9, wherein a flange portion is formed on an outer surface of the peripheral wall portion on the opening side of the insert case, and a through hole is provided in the flange portion. apparatus.
JP2008303333A 2008-11-28 2008-11-28 Power semiconductor device Active JP4607995B2 (en)
JP2008303333A JP4607995B2 (en) 2008-11-28 2008-11-28 Power semiconductor device
US12/582,246 US8610261B2 (en) 2008-11-28 2009-10-20 Power semiconductor device
DE102009055882A DE102009055882B4 (en) 2008-11-28 2009-11-26 Power semiconductor device
JP2010129797A true JP2010129797A (en) 2010-06-10
JP4607995B2 JP4607995B2 (en) 2011-01-05
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