WO2016059702A1 - 半導体モジュール - Google Patents
半導体モジュール Download PDFInfo
- Publication number
- WO2016059702A1 WO2016059702A1 PCT/JP2014/077545 JP2014077545W WO2016059702A1 WO 2016059702 A1 WO2016059702 A1 WO 2016059702A1 JP 2014077545 W JP2014077545 W JP 2014077545W WO 2016059702 A1 WO2016059702 A1 WO 2016059702A1
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- circuit board
- semiconductor element
- semiconductor
- rectangular parallelepiped
- connector
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- H10W40/00—Arrangements for thermal protection or thermal control
- H10W40/20—Arrangements for cooling
- H10W40/22—Arrangements for cooling characterised by their shape, e.g. having conical or cylindrical projections
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- H10W40/00—Arrangements for thermal protection or thermal control
- H10W40/20—Arrangements for cooling
- H10W40/22—Arrangements for cooling characterised by their shape, e.g. having conical or cylindrical projections
- H10W40/226—Arrangements for cooling characterised by their shape, e.g. having conical or cylindrical projections characterised by projecting parts, e.g. fins to increase surface area
- H10W40/228—Arrangements for cooling characterised by their shape, e.g. having conical or cylindrical projections characterised by projecting parts, e.g. fins to increase surface area the projecting parts being wire-shaped or pin-shaped
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- H10W40/00—Arrangements for thermal protection or thermal control
- H10W40/20—Arrangements for cooling
- H10W40/25—Arrangements for cooling characterised by their materials
- H10W40/255—Arrangements for cooling characterised by their materials having a laminate or multilayered structure, e.g. direct bond copper [DBC] ceramic substrates
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- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/20—Conductive package substrates serving as an interconnection, e.g. metal plates
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- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/40—Leadframes
- H10W70/464—Additional interconnections in combination with leadframes
- H10W70/468—Circuit boards
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- H10W72/00—Interconnections or connectors in packages
- H10W72/60—Strap connectors, e.g. thick copper clips for grounding of power devices
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- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/073—Connecting or disconnecting of die-attach connectors
- H10W72/07331—Connecting techniques
- H10W72/07336—Soldering or alloying
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/073—Connecting or disconnecting of die-attach connectors
- H10W72/07331—Connecting techniques
- H10W72/07337—Connecting techniques using a polymer adhesive, e.g. an adhesive based on silicone or epoxy
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- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/076—Connecting or disconnecting of strap connectors
- H10W72/07631—Techniques
- H10W72/07636—Soldering or alloying
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- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/076—Connecting or disconnecting of strap connectors
- H10W72/07631—Techniques
- H10W72/07637—Techniques using a polymer adhesive, e.g. an adhesive based on silicone or epoxy
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/60—Strap connectors, e.g. thick copper clips for grounding of power devices
- H10W72/651—Materials of strap connectors
- H10W72/652—Materials of strap connectors comprising metals or metalloids, e.g. silver
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- H10W72/00—Interconnections or connectors in packages
- H10W72/60—Strap connectors, e.g. thick copper clips for grounding of power devices
- H10W72/651—Materials of strap connectors
- H10W72/655—Materials of strap connectors of outermost layers of multilayered strap connectors, e.g. material of a coating
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- H10W90/00—Package configurations
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- H10W90/22—Configurations of stacked chips the stacked chips being on both top and bottom sides of a package substrate, interposer or RDL
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- H10W90/00—Package configurations
- H10W90/20—Configurations of stacked chips
- H10W90/24—Configurations of stacked chips at least one of the stacked chips being laterally offset from a neighbouring stacked chip, e.g. chip stacks having a staircase shape
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- H10W90/00—Package configurations
- H10W90/20—Configurations of stacked chips
- H10W90/288—Configurations of stacked chips characterised by arrangements for thermal management of the stacked chips
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- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/731—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors
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- H—ELECTRICITY
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/731—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors
- H10W90/732—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors between stacked chips
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- H—ELECTRICITY
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/751—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
- H10W90/752—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between stacked chips
Definitions
- the present invention relates to a semiconductor module.
- Patent Documents 1 to 4 Semiconductor modules having a plurality of semiconductor elements are known (for example, Patent Documents 1 to 4).
- a semiconductor module it is required to integrate a plurality of semiconductor elements at high density.
- a structure in which a plurality of semiconductor elements are stacked via connectors is considered.
- a plurality of semiconductor elements are arranged adjacent to each other in the stacking direction via the connector, so that part of the heat released from each semiconductor element is adjacent to the other via the connector. Flows into the semiconductor element. Therefore, each semiconductor element is heated by the heat released from the other semiconductor elements, and there is a problem in terms of heat dissipation.
- an object of this invention is to provide the semiconductor module which can thermally radiate the heat
- a semiconductor module includes a first circuit board having thermal conductivity, a second circuit board having thermal conductivity disposed opposite to the first circuit board, Bonded to the first semiconductor element bonded to the facing surface of the first circuit board facing the second circuit board, and to the facing surface of the second circuit board facing the first circuit board.
- a portion sandwiched between one semiconductor element and the second circuit board is in contact with the first semiconductor element and the second circuit board.
- the connector has a portion that is sandwiched between the first semiconductor element and the second circuit board without passing through the second semiconductor element. Therefore, at least a part of the heat of the first semiconductor element is directly transmitted to the second circuit board without passing through the second semiconductor element. Thereby, the heat of the first semiconductor element can be efficiently radiated from both the first circuit board and the second circuit board. In addition, since heat flowing from the first semiconductor element into the second semiconductor element is reduced, it is possible to suppress the second semiconductor element from being heated by the heat released from the first semiconductor element. Therefore, according to the present invention, a semiconductor module with high heat dissipation can be provided.
- a semiconductor module 1A according to the first embodiment includes a first circuit board 2, a second circuit board 3 disposed to face the first circuit board 2, and a first circuit board 2.
- the first semiconductor element 4 bonded to the circuit board 2, the second semiconductor element 5 bonded to the second circuit board 3, and the first semiconductor element 4 and the second semiconductor element 5 are mutually connected.
- a connector 6 for electrical connection is provided.
- the first circuit board 2 and the second circuit board 3 of the present embodiment are, for example, ceramic substrates having thermal conductivity, and plate-shaped ceramic plates 21 and 31 having insulation properties, and ceramic plates 21 and 31, respectively. And conductive layers 22 and 32 provided on the main surface of 31.
- the first circuit board 2 and the second circuit board 3 are provided with conductive layers 22 and 32 on both main surfaces of the ceramic plates 21 and 31.
- the conductive layers 22 and 32 may be conductive, but are preferably made of a material having high electrical conductivity such as copper.
- the first circuit board 2 and the second circuit board 3 are arranged so that one of the conductive layers 22A and 32A (hereinafter referred to as the first conductive layers 22A and 32A) faces each other. 31 are arranged at intervals in the thickness direction.
- the first conductive layers 22A and 32A of the first circuit board 2 and the second circuit board 3 constitute a circuit of the semiconductor module 1A together with the first semiconductor element 4, the second semiconductor element 5 and the connector 6. It is formed as a wiring pattern.
- the first semiconductor element 4 is bonded to the first conductive layer 22A of the first circuit board 2, and the second semiconductor element 5 is bonded to the first conductive layer 32A of the second circuit board 3.
- a conductive adhesive such as solder
- One main surface of the semiconductor element 5 is joined to the first conductive layer 32A of the second circuit board 3 by a conductive adhesive (not shown) such as solder.
- the first semiconductor element 4 is electrically connected to the first conductive layer 22A of the first circuit board 2
- the second semiconductor element 5 is electrically connected to the first conductive layer 32A of the second circuit board 3. It is connected.
- the electrode of the first semiconductor element 4 bonded to the first circuit board 2 and the electrode of the second semiconductor element 5 bonded to the second circuit board 3 are different from each other. It is configured.
- the first semiconductor element 4 and the second semiconductor element 5 joined as described above are arrows in a direction (FIG. 1A) orthogonal to the facing surface of the first circuit board 2 facing the second circuit board 3. They are arranged at positions that do not overlap each other when viewed from the direction A (hereinafter referred to as a circuit board orthogonal direction A).
- the direction in which the first semiconductor elements 4 and the second semiconductor elements 5 are arranged is the first circuit board surface direction.
- the direction orthogonal to the circuit board orthogonal direction A and the first circuit board surface direction B (the direction of the arrow C in FIG. 1B) will be described as the second circuit board surface direction C.
- the connector 6 is made of, for example, a conductive material such as copper, and plays a role of electrically connecting the first semiconductor element 4 and the second semiconductor element 5.
- the connector 6 is joined to the first semiconductor element 4 and the second semiconductor element 5, and also to the first conductive layers 22 ⁇ / b> A and 32 ⁇ / b> A of the first circuit board 2 and the second circuit board 3. It is joined.
- the connector 6 of the present embodiment includes a first element junction 61 that is joined to the first semiconductor element 4, a second element junction 62 that is joined to the second semiconductor element 5, And a connection portion 63 for connecting the one element junction portion 61 and the second element junction portion 62. These are arranged in the order of the first element bonding portion 61, the connecting portion 63, and the second element bonding portion 62 from one side to the other side in the first circuit board surface direction B, and are integrally formed.
- the first element joint portion 61 is formed in a substantially rectangular parallelepiped shape whose surface faces the circuit board orthogonal direction A, the first circuit board surface direction B, and the second circuit board surface direction C.
- the first element junction 61 is arranged so as to overlap with the first semiconductor element 4 in the circuit board orthogonal direction A and not overlap with the second semiconductor element 5.
- the end surface on the first semiconductor element 4 side is bonded to the main surface of the first semiconductor element 4 by a conductive adhesive (not shown) such as solder, and the second circuit.
- the end face on the substrate 3 side is joined to the first conductive layer 32A of the second circuit board 3 by a conductive adhesive (not shown) such as solder. That is, the first element junction 61 is sandwiched between the first semiconductor element 4 and the second circuit board 3 without the second semiconductor element 5 interposed therebetween.
- the first element joint 61 of the connector 6 and the second semiconductor element 5 are both joined to the first conductive layer 32A of the second circuit board 3, but the first of the second circuit board 3 In the conductive layer 32A, the region where the first element junction 61 of the connector 6 is joined and the region where the second semiconductor element 5 is joined are electrically independent.
- the second element joint portion 62 is formed in a substantially rectangular parallelepiped shape whose surfaces face the circuit board orthogonal direction A, the first circuit board surface direction B, and the second circuit board surface direction C, respectively.
- These are arranged in order of the first rectangular parallelepiped portion 62a, the connecting portion 62c, and the second rectangular parallelepiped portion 62d from one side to the other side in the first circuit board surface direction B, and are integrally formed.
- the first rectangular parallelepiped portion 62a, the second rectangular parallelepiped portion 62b, and the connecting portion 62c are formed so that the dimensions in the second circuit board surface direction C are substantially the same.
- the dimension of the element junction 61 is set to be smaller than the dimension in the second circuit board surface direction C.
- connection part 62c of the 1st rectangular parallelepiped part 62a and the end surface by the side of the 1st rectangular parallelepiped part 62a of the connection part 62c are connected, and the end face by the side of the 1st circuit board 2 of the connection part 62c A part of the end face of the second rectangular parallelepiped portion 62b on the second circuit board 3 side is connected.
- the connecting part 62c is formed with a dimension in the first circuit board surface direction B smaller than that of the second rectangular parallelepiped part 62b.
- the second element joint portion 62 is arranged so as to overlap the second semiconductor element 5 in the circuit board orthogonal direction A and not overlap with the first semiconductor element 4.
- the end surface on the second semiconductor element 5 side is joined to the main surface of the second semiconductor element 5 by a conductive adhesive (not shown) such as solder, and the first circuit board.
- the end surface on the 2 side is separated from the first circuit board 2.
- the end face on the first circuit board 2 side is joined to the first conductive layer 22A of the first circuit board 2 by a conductive adhesive (not shown) such as solder,
- the end face on the second circuit board 3 side is separated from the second circuit board 3.
- the connecting portion 62 c is not bonded to the bonded first circuit board 2, second circuit board 3, first semiconductor element 4, and second semiconductor element 5.
- the second element junction 62 having the first rectangular parallelepiped part 62a, the second rectangular parallelepiped part 62b, and the connecting part 62c is connected to the second semiconductor element 5 without the first semiconductor element 4 interposed therebetween. It is sandwiched between the first circuit board 2.
- the second element joint portion 62 of the connector 6 and the first semiconductor element 4 are both joined to the first conductive layer 22A of the first circuit board 2, but the first of the first circuit board 2 In the conductive layer 22A, the region where the second element junction 62 of the connector 6 is joined and the region where the first semiconductor element 4 is joined are electrically independent.
- connection portion 63 is formed in a substantially rectangular parallelepiped shape whose surface faces the circuit board orthogonal direction A, the first circuit board surface direction B, and the second circuit board surface direction C, and the first element joint portion 61 and the second circuit board surface direction B are formed. It arrange
- the connection portion 63 is not joined to the first circuit board 2, the second circuit board 3, the first semiconductor element 4, and the second semiconductor element 5.
- the connector 6 may be joined to an external connection lead (not shown).
- the connector 6 may be provided with an external connection portion 64 that is joined to the external connection lead.
- the external connection portion 64 shown in FIG. 2 is formed in a shape extending from the first element joint portion 61 in a direction away from the connection portion 63 in the first circuit board surface direction B.
- the semiconductor module 1A of the present embodiment may include, for example, a connection terminal (not shown) for connecting the circuit of the semiconductor module 1A to the outside.
- the connection terminal may be bonded to, for example, the first semiconductor element 4, the second semiconductor element 5, and the first conductive layers 22A and 32A.
- the heat generated in the first semiconductor element 4 due to energization is transmitted to the first circuit board 2 and the first element joint portion of the connector 6 It is transmitted to the second circuit board 3 via 61.
- heat generated in the second semiconductor element 5 is transmitted to the second circuit board 3 and also transmitted to the first circuit board 2 via the second element joint portion 62 of the connector 6.
- the heat of the first semiconductor element 4 and the second semiconductor element 5 transmitted to the first circuit board 2 and the second circuit board 3 can be released to the outside of the semiconductor module 1A.
- a heat sink is brought into contact with the other conductive layers 22 and 32 located on the opposite side of the first conductive layers 22A and 32A in the first circuit board 2 and the second circuit board 3, so that the heat described above is transferred to the semiconductor. It can be efficiently discharged outside the module 1A.
- the semiconductor module 1A according to the first embodiment the first semiconductor element 4 and the second semiconductor element 5 are arranged at positions that do not overlap each other in the circuit board orthogonal direction A, and the connector 6 is the second semiconductor.
- the first element junction 61 is sandwiched between the first semiconductor element 4 and the second circuit board 3 without the element 5 interposed therebetween. Thereby, the heat of the first semiconductor element 4 can be directly transferred to the second circuit board 3 without passing through the second semiconductor element 5.
- the connector 6 since the connector 6 has the second element joint portion 62 sandwiched between the second semiconductor element 5 and the first circuit board 2 without the first semiconductor element 4 interposed, The heat of the semiconductor element 5 can be directly transferred to the first circuit board 2 without going through the first semiconductor element 4. For this reason, the heat of the first semiconductor element 4 and the second semiconductor element 5 can be efficiently radiated from both the first circuit board 2 and the second circuit board 3.
- a part of the first semiconductor element 4 and a part of the second semiconductor element 5 are superimposed in the circuit board orthogonal direction A.
- the area where the first semiconductor element 4 and the second semiconductor element 5 overlap when viewed from the circuit board orthogonal direction A is preferably, for example, 1/3 to 1/2 of the area of the first semiconductor element 4. .
- the connector 7 includes a first element joint 71 joined to the first semiconductor element 4, a second element joint 72 joined to the second semiconductor element 5, and have.
- the first element joint portion 71 and the second element joint portion 72 are integrally formed.
- the first element joint portion 71 is a first rectangular parallelepiped portion formed in a substantially rectangular parallelepiped shape whose surfaces face the circuit board orthogonal direction A, the first circuit board surface direction B, and the second circuit board surface direction C, respectively.
- 71a and a second rectangular parallelepiped portion 71b are arranged in the order of the first rectangular parallelepiped portion 71a and the second rectangular parallelepiped portion 71b from the first circuit board 2 side to the second circuit board 3 side in the circuit board orthogonal direction A, and are integrally formed.
- the first rectangular parallelepiped portion 71a and the second rectangular parallelepiped portion 71b are formed so that the dimensions in the second circuit board surface direction C are substantially the same.
- the first rectangular parallelepiped portion 71a is formed to have a larger dimension in the first circuit board surface direction B than the second rectangular parallelepiped portion 71b.
- the end surface on the first semiconductor element 4 side is joined to the main surface of the first semiconductor element 4 by a conductive adhesive (not shown) such as solder, and the second circuit board.
- the end face on the 3 side is partly joined to the second rectangular parallelepiped part 71b, the other part is joined to the second element joint part 72, and the other parts are not joined. It is separated from the second circuit board 3 and the second semiconductor element 5.
- the end surface on the second circuit board 3 side is joined to the first conductive layer 32A of the second circuit board 3 by a conductive adhesive (not shown) such as solder,
- a conductive adhesive such as solder
- the first element joint portion 71 having the first rectangular parallelepiped portion 71a and the second rectangular parallelepiped portion 71b is not connected to the second semiconductor element 5 and the first semiconductor element 4 and the second circuit. It is sandwiched between the substrate 3.
- the first element joint 71 and the second semiconductor element 5 of the connector 7 are both joined to the first conductive layer 32 ⁇ / b> A of the second circuit board 3.
- the region where the first element junction 71 of the connector 7 is joined and the region where the second semiconductor element 5 is joined are electrically independent.
- the 2nd element junction part 72 is the 1st rectangular parallelepiped part formed in the substantially rectangular parallelepiped shape in which the surface faces the circuit board orthogonal direction A, the 1st circuit board surface direction B, and the 2nd circuit board surface direction C, respectively.
- These are arranged in order of the first rectangular parallelepiped portion 72a, the connecting portion 72c, and the second rectangular parallelepiped portion 72b from one side to the other side in the first circuit board surface direction B, and are integrally formed.
- the first rectangular parallelepiped portion 72a, the second rectangular parallelepiped portion 72b, and the connecting portion 72c are formed such that the dimensions in the second circuit board surface direction C are substantially the same. This dimension is set to be smaller than the dimension of the first element bonding portion 61 in the second circuit board surface direction C.
- connection part 72c And the end surface by the side of the 1st rectangular parallelepiped part 72a of the connection part 72c and the end surface by the side of the 1st rectangular parallelepiped part 72a of the connection part 72c are connected, and the end surface by the side of the 1st circuit board 2 of the connection part 72c A part of the end face on the second circuit board 3 side of the second rectangular parallelepiped portion 72b is connected.
- the connecting portion 72c is formed with a dimension in the first circuit board surface direction B smaller than that of the second rectangular parallelepiped portion 72b.
- the end surface on the second semiconductor element 5 side is joined to the main surface of the second semiconductor element 5 by a conductive adhesive (not shown) such as solder, and the first circuit board.
- the end surface on the 2 side is separated from the first circuit board 2.
- the end face of the second rectangular parallelepiped portion 72b on the first circuit board 2 side is joined to the first conductive layer 22A of the first circuit board 2 by a conductive adhesive (not shown) such as solder,
- the end face on the second circuit board 3 side is separated from the second circuit board 3.
- the connecting portion 72 c is not joined to the first circuit board 2, the second circuit board 3, the first semiconductor element 4, and the second semiconductor element 5.
- the second element joint portion 72 having the first rectangular parallelepiped portion 72a, the second rectangular parallelepiped portion 72b, and the connecting portion 72c is connected to the second semiconductor element 5 without the first semiconductor element 4 interposed therebetween. It is sandwiched between the first circuit board 2.
- the second element joint portion 72 of the connector 7 and the first semiconductor element 4 are both joined to the first conductive layer 22A of the first circuit board 2, but the first of the first circuit board 2 In the conductive layer 22A, the region where the second element junction 72 of the connector 7 is joined and the region where the first semiconductor element 4 is joined are electrically independent.
- Such a connector 7 includes the first rectangular parallelepiped portion 71a and the first rectangular parallelepiped portion 71a of the first element joint portion 71 in the portion where the first semiconductor element 4 and the second semiconductor element 5 overlap in the circuit board orthogonal direction A.
- the first rectangular parallelepiped portion 72a of the second element joint portion 72 is connected.
- the heat generated in the first semiconductor element 4 is transmitted to the first circuit board 2 and connected as in the case of the first embodiment. It is transmitted to the second circuit board 3 via the first element joint 71 of the child 7. Further, the heat generated in the second semiconductor element 5 is transmitted to the second circuit board 3 and also transmitted to the first circuit board 2 via the second element joint portion 72 of the connector 7. The heat of the first semiconductor element 4 and the second semiconductor element 5 transmitted to the first circuit board 2 and the second circuit board 3 can be released to the outside of the semiconductor module 1B.
- the same effects as those of the first embodiment can be obtained.
- a part of the first semiconductor element 4 and a part of the second semiconductor element 5 are arranged so as to overlap in the circuit board orthogonal direction A.
- the size viewed from the circuit board orthogonal direction A can be reduced as compared with the semiconductor module 1A of the first embodiment. That is, it is possible to reduce the size of the semiconductor module 1B.
- the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.
- the conductive layers of the first circuit board 2 and the second circuit board 3 are provided on both main surfaces of the ceramic plates 21, 31. It may be provided only on the main surface.
- a sealing resin for sealing the first semiconductor element 4, the second semiconductor element 5, and the connectors 6 and 7 is provided between the first circuit board 2 and the second circuit board 3, for example. May be.
- the first circuit board 2 and the second circuit board 3 have at least thermal conductivity and conductivity for electrical connection with the first semiconductor element 4 and the second semiconductor element 5. Just do it. Therefore, the first circuit board 2 and the second circuit board 3 are not limited to ceramic substrates, and may be aluminum substrates, for example.
- the first semiconductor element 4 and the second semiconductor element 5 are arranged so that each part thereof overlaps the circuit board orthogonal direction A.
- the first semiconductor element 4 is formed larger than the second semiconductor element 5 when viewed from the circuit board orthogonal direction A, and the first semiconductor element 4 and the entire or substantially entire second semiconductor element 5 may be arranged so as to overlap in the circuit board orthogonal direction A.
- the connector 8 that electrically connects the first semiconductor element 4 and the second semiconductor element 5 is not connected to the first semiconductor element 4 and the second semiconductor element 5 at least. It suffices to have a portion that is sandwiched between the first semiconductor element 4 and the second circuit board 3.
- the 2nd element junction part 62 has the 1st rectangular parallelepiped part 62a, the 2nd rectangular parallelepiped part 62b, and the connection part 62c.
- the second element joint portion 62D does not have the second cuboid portion 62b and the connecting portion 62c, but has the first cuboid portion 62a.
- the end face of the rectangular parallelepiped portion 62a on the second semiconductor element 5 side is joined to the main surface of the second semiconductor element 5 by a conductive adhesive (not shown) such as solder, and the first circuit board 2 side.
- the end surface may be bonded to the first conductive layer 22A of the first circuit board 2 by a conductive adhesive (not shown) such as solder. Even in such a case, the heat generated in the second semiconductor element 5 is not only applied to the second circuit board 3 but also to the first circuit board 2 via the second element joint portion 62D of the connector 6. Can also tell.
- a conductive adhesive such as solder
- the 2nd element junction part 72 has the 1st rectangular parallelepiped part 72a, the 2nd rectangular parallelepiped part 72b, and the connection part 72c.
- the second element joint portion 72E does not have the connecting portion 72c, and includes the first cuboid portion 72a and the second cuboid portion 72b. Then, the end face of the first rectangular parallelepiped portion 72a on the second semiconductor element 5 side is joined to the main surface of the second semiconductor element 5 by a conductive adhesive (not shown) such as solder, and the first circuit.
- Part of the end face on the substrate 2 side is joined to part of the end face on the second circuit board 3 side of the second cuboid part 72b, and the end face on the first circuit board 2 side of the second cuboid part 72b. May be bonded to the first conductive layer 22A of the first circuit board 2 by a conductive adhesive (not shown) such as solder. Even in such a case, the heat generated in the second semiconductor element 5 is applied not only to the second circuit board 3 but also to the first circuit board 2 via the second element joint portion 72E of the connector 7. Can also tell.
- the connectors 6, 7, and 8 are formed in a shape in which substantially rectangular parallelepiped members are combined, but the substantially cylindrical shape or cross-sectional shape is substantially Z-shaped, rod-shaped or plate-shaped. It may be formed into a suitable shape such as a shape in which members such as shapes are combined.
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- Combinations Of Printed Boards (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
Abstract
Description
したがって、本発明によれば、放熱性の高い半導体モジュールを提供することができる。
以下、本発明の第一の実施形態による半導体モジュールについて、図1A、図1Bおよび図2に基づいて説明する。
図1Aおよび図1Bに示すように、第一の実施形態による半導体モジュール1Aは、第一の回路基板2と、第一の回路基板2に対向配置された第二の回路基板3と、第一の回路基板2に接合された第一の半導体素子4と、第二の回路基板3に接合された第二の半導体素子5と、第一の半導体素子4および第二の半導体素子5を相互に電気接続する接続子6と、を備えている。
具体的には、第一の半導体素子4の一方の主面が、はんだ等の導電性接着剤(不図示)によって第一の回路基板2の第一の導電層22Aに接合され、第二の半導体素子5の一方の主面が、はんだ等の導電性接着剤(不図示)によって第二の回路基板3の第一の導電層32Aに接合されている。これにより、第一の半導体素子4が第一の回路基板2の第一の導電層22Aに電気接続され、第二の半導体素子5が第二の回路基板3の第一の導電層32Aに電気接続されている。
上記のように接合された第一の半導体素子4および第二の半導体素子5は、第二の回路基板3と対向する第一の回路基板2の対向面に直交する方向(図1A)において矢印Aの方向、以下、回路基板直交方向Aとする)から見て、互いに重畳しない位置に配置されている。
ここで、回路基板直交方向Aに直交する方向で、第一の半導体素子4および第二の半導体素子5が配列されている方向(図1Aにおいて矢印Bの方向)を第一の回路基板面方向Bとし、回路基板直交方向Aおよび第一の回路基板面方向Bに直交する方向(図1Bにおいて矢印Cの方向)を第二の回路基板面方向Cとして以下説明する。
本実施形態の接続子6は、第一の半導体素子4と接合されている第一の素子接合部61と、第二の半導体素子5と接合されている第二の素子接合部62と、第一の素子接合部61と第二の素子接合部62とを接続する接続部63と、を有している。これらは、第一の素子接合部61、接続部63、第二の素子接合部62の順に第一の回路基板面方向Bの一方側から他方側に配列され、一体に形成されている。
接続子6の第一の素子接合部61および第二の半導体素子5は、ともに第二の回路基板3の第一の導電層32Aに接合されているが、第二の回路基板3の第一の導電層32Aにおいて、接続子6の第一の素子接合部61が接合される領域と、第二の半導体素子5が接合される領域とは、電気的に独立している。
第二の素子接合部62は、第二の半導体素子5とは回路基板直交方向Aに重畳し、第一の半導体素子4とは重畳しないように配置されている。
第二の直方体部62bのうち、第一の回路基板2側の端面は、はんだ等の導電性接着剤(不図示)によって第一の回路基板2の第一の導電層22Aに接合され、第二の回路基板3側の端面は、第二の回路基板3と離間している。
連結部62cは、接合第一の回路基板2、第二の回路基板3、第一の半導体素子4、および第二の半導体素子5に接合されていない。
接続子6の第二の素子接合部62および第一の半導体素子4は、ともに第一の回路基板2の第一の導電層22Aに接合されているが、第一の回路基板2の第一の導電層22Aにおいて、接続子6の第二の素子接合部62が接合される領域と、第一の半導体素子4が接合される領域とは、電気的に独立している。
なお、接続子6は、外部接続リード(不図示)に接合されていてもよい。例えば、図2に示すように、接続子6に外部接続リードと接合される外部接続部64が設けられていてもよい。図2に示す外部接続部64は、第一の素子接合部61から第一の回路基板面方向Bの接続部63と離間する方向に延びる形状に形成されている。
そして、第一の回路基板2および第二の回路基板3に伝わった第一の半導体素子4および第二の半導体素子5の熱は、半導体モジュール1Aの外部に放出することが可能である。例えば、第一の回路基板2や第二の回路基板3において第一の導電層22A,32Aと反対側に位置する他方の導電層22,32にヒートシンクを接触させることで、上記した熱を半導体モジュール1Aの外部に効率よく放出することができる。
第一の実施形態による半導体モジュール1Aでは、第一の半導体素子4と第二の半導体素子5とが回路基板直交方向Aに互いに重畳しない位置に配置されていて、接続子6が第二の半導体素子5を介さずに第一の半導体素子4と第二の回路基板3との間に挟み込まれた第一の素子接合部61を有する。これにより、第一の半導体素子4の熱を第二の半導体素子5を介さずに直接第二の回路基板3に伝えることができる。
また、接続子6が第一の半導体素子4を介さずに第二の半導体素子5と第一の回路基板2との間に挟み込まれた第二の素子接合部62を有することにより、第二の半導体素子5の熱を第一の半導体素子4を介さずに直接第一の回路基板2に伝えることができる。
このため、第一の半導体素子4および第二の半導体素子5の熱を、第一の回路基板2と第二の回路基板3との双方から効率よく放熱させることができる。
以上のことから、放熱性の高い半導体モジュール1Aを提供することができる。
次に、第二の実施形態について、添付図面に基づいて説明するが、上述の第一の実施形態と同一又は同様な部材、部分には同一の符号を用いて説明を省略し、第一の実施形態と異なる構成について説明する。
第二の直方体部71bのうち、第二の回路基板3側の端面は、はんだ等の導電性接着剤(不図示)によって第二の回路基板3の第一の導電層32Aに接合され、第一の回路基板2側の端面は、第一の直方体部71aに接合されている。
接続子7の第一の素子接合部71および第二の半導体素子5は、ともに第二の回路基板3の第一の導電層32Aに接合されているが、第二の回路基板3の第一の導電層32Aにおいて、接続子7の第一の素子接合部71が接合される領域と、第二の半導体素子5が接合される領域とは、電気的に独立している。
第二の直方体部72bのうち、第一の回路基板2側の端面は、はんだ等の導電性接着剤(不図示)によって第一の回路基板2の第一の導電層22Aに接合され、第二の回路基板3側の端面は、第二の回路基板3と離間している。
連結部72cは、第一の回路基板2、第二の回路基板3、第一の半導体素子4、および第二の半導体素子5に接合されていない。
接続子7の第二の素子接合部72および第一の半導体素子4は、ともに第一の回路基板2の第一の導電層22Aに接合されているが、第一の回路基板2の第一の導電層22Aにおいて、接続子7の第二の素子接合部72が接合される領域と、第一の半導体素子4が接合される領域とは、電気的に独立している。
そして、第一の回路基板2および第二の回路基板3に伝わった第一の半導体素子4および第二の半導体素子5の熱は、半導体モジュール1Bの外部に放出することが可能である。
また、本実施形態の半導体モジュール1Bによれば、第一の半導体素子4の一部と第二の半導体素子5の一部とが、回路基板直交方向Aに重畳するように配置されていることにより、第一の実施形態の半導体モジュール1Aと比較して、回路基板直交方向Aから見た大きさを小さくすることができる。すなわち、半導体モジュール1Bの小型化を図ることができる。
例えば、上記の実施形態では、第一の回路基板2および第二の回路基板3の導電層は、セラミック板21,31の両主面に設けられているが、セラミック板21,31の一方の主面のみに設けられてもよい。
また、第一の回路基板2と第二の回路基板3との間には、例えば第一の半導体素子4、第二の半導体素子5および接続子6,7を封止する封止樹脂が設けられてもよい。
このような場合にも、第二の半導体素子5において発生した熱を、第二の回路基板3だけではく、接続子6の第二の素子接合部62Dを介して第一の回路基板2にも伝えることができる。
このような場合にも、第二の半導体素子5において発生した熱を、第二の回路基板3だけではく、接続子7の第二の素子接合部72Eを介して第一の回路基板2にも伝えることができる。
2 第一の回路基板
3 第二の回路基板
4 第一の半導体素子
5 第二の半導体素子
6,7,8 接続子
A 回路基板直交方向
Claims (3)
- 熱伝導性を有する第一の回路基板と、
前記第一の回路基板と対向配置された熱伝導性を有する第二の回路基板と、
前記第二の回路基板と対向する前記第一の回路基板の対向面に接合された第一の半導体素子と、
前記第一の回路基板と対向する前記第二の回路基板の対向面に接合された第二の半導体素子と、
前記第一の半導体素子と前記第二の半導体素子とを電気接続する接続子と、を含み、
前記接続子は、前記第二の半導体素子を介さずに前記第一の半導体素子と前記第二の回路基板との間に挟み込まれて前記第一の半導体素子と前記第二の回路基板とに接する部分を有する半導体モジュール。 - 前記接続子は、前記第一の半導体素子を介さずに前記第二の半導体素子と前記第一の回路基板との間に挟み込まれて前記第二の半導体素子と前記第一の回路基板とに接する部分を有する請求項1に記載の半導体モジュール。
- 前記第一の半導体素子と前記第二の半導体素子は、前記第一の回路基板の対向面と直交する方向から見て、互いに重畳しない位置に配置されている請求項2に記載の半導体モジュール。
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| US14/786,295 US9704828B2 (en) | 2014-10-16 | 2014-10-16 | Semiconductor module |
| EP14889184.9A EP3208838B1 (en) | 2014-10-16 | 2014-10-16 | Semiconductor module |
| JP2015522811A JP5950488B1 (ja) | 2014-10-16 | 2014-10-16 | 半導体モジュール |
| PCT/JP2014/077545 WO2016059702A1 (ja) | 2014-10-16 | 2014-10-16 | 半導体モジュール |
| CN201480022408.7A CN105723508B (zh) | 2014-10-16 | 2014-10-16 | 半导体模块 |
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| WO2018047485A1 (ja) * | 2016-09-06 | 2018-03-15 | ローム株式会社 | パワーモジュールおよびインバータ装置 |
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| WO2018211680A1 (ja) | 2017-05-19 | 2018-11-22 | 新電元工業株式会社 | 電子モジュール |
| JP6602981B2 (ja) * | 2017-08-24 | 2019-11-06 | 新電元工業株式会社 | 半導体装置 |
| JP6732118B2 (ja) * | 2017-09-14 | 2020-07-29 | 新電元工業株式会社 | 電子モジュール及び電子モジュールの製造方法 |
| CN111602239B (zh) * | 2018-01-11 | 2023-10-24 | 阿莫善斯有限公司 | 功率半导体模块 |
| JP7025948B2 (ja) * | 2018-02-13 | 2022-02-25 | ローム株式会社 | 半導体装置および半導体装置の製造方法 |
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Also Published As
| Publication number | Publication date |
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| US9704828B2 (en) | 2017-07-11 |
| JPWO2016059702A1 (ja) | 2017-04-27 |
| JP5950488B1 (ja) | 2016-07-13 |
| EP3208838B1 (en) | 2021-11-24 |
| US20160254250A1 (en) | 2016-09-01 |
| CN105723508A (zh) | 2016-06-29 |
| CN105723508B (zh) | 2018-06-12 |
| EP3208838A1 (en) | 2017-08-23 |
| EP3208838A4 (en) | 2018-05-30 |
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