JPWO2015079600A1 - パワーモジュール - Google Patents
パワーモジュール Download PDFInfo
- Publication number
- JPWO2015079600A1 JPWO2015079600A1 JP2015550534A JP2015550534A JPWO2015079600A1 JP WO2015079600 A1 JPWO2015079600 A1 JP WO2015079600A1 JP 2015550534 A JP2015550534 A JP 2015550534A JP 2015550534 A JP2015550534 A JP 2015550534A JP WO2015079600 A1 JPWO2015079600 A1 JP WO2015079600A1
- Authority
- JP
- Japan
- Prior art keywords
- power module
- power semiconductor
- main terminal
- semiconductor element
- bonding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000004020 conductor Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 239000004065 semiconductor Substances 0.000 claims description 152
- 239000000758 substrate Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 29
- 229920005989 resin Polymers 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 description 46
- 239000002184 metal Substances 0.000 description 46
- 238000005304 joining Methods 0.000 description 22
- 238000007789 sealing Methods 0.000 description 17
- 238000003466 welding Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 14
- 230000001965 increasing effect Effects 0.000 description 14
- 229910000679 solder Inorganic materials 0.000 description 14
- 238000005452 bending Methods 0.000 description 11
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 238000006664 bond formation reaction Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
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- H01L23/053—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having an insulating or insulated base as a mounting for the semiconductor body
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Abstract
Description
図1は、この発明の実施の形態1のパワーモジュールの断面構造模式図である。図1において、パワーモジュール100は、放熱用金属ベース板1、第一の基材部である絶縁基板2、第二の基材部であるパワー半導体素子3、表面電極4、導体部である主端子5,10、開口部である開口6、配線部であるボンディングリボン7、ケース8、封止樹脂11を備える。
本実施の形態2においては、実施の形態1で用いた開口6を備えた主端子5の開口6をなくし、ボンディングリボン7の一端が主端子5のパワー半導体素子3と対向する面側に超音波溶接され、ボンディングリボン7の他端がパワー半導体素子3の表面電極4に超音波溶接された点が異なる。このようにボンディングリボン7の近傍を用いて接合したので、使用するボンディングリボン7の量を低減することができる。
本実施の形態3においては、実施の形態1で用いた主端子10と絶縁基板2とをハンダ接合とした接合部分を、主端子5の場合と同様に、主端子10に開口6を形成し、ボンディングリボン7を介して絶縁基板2と接合した点が異なる。このように、主端子5および主端子10の接合を同一工程で形成することができ、工程数を削減できる。また、主端子10と絶縁基板2との接合の信頼性を向上することができる。
本実施の形態4においては、実施の形態1で用いた主端子5の開口6を、複数個所形成し、ボンディングリボン7を介した接合箇所を複数とする構成とした点が異なる。このように接合箇所を増やすことで、パワー半導体素子3の電流密度を増加させることができる。また、パワー半導体素子3の電流密度が同じ場合では、各ボンディングリボン7に流れる電流密度を小さくすることができるため、接合の信頼性をさらに向上することが可能となる。
本実施の形態5においては、実施の形態4で用いた主端子5の開口6を複数個所形成し、主端子5との複数個所でのボンディングリボン7を介する接合を、ステッチ接続とした点が異なる。このように、ステッチ接続とすることで超音波溶接する箇所数が減少するため、工程のリードタイムを短縮することができる。
本実施の形態6においては、実施の形態4で用いた主端子5のパワー半導体素子3と対向する面内かつ、ボンディングリボン7を形成しない箇所にも1つ以上の開口12を形成する構成とした点が異なる。このように、主端子5とパワー半導体素子3との間への封止樹脂11の注入性を高めることができ、製造歩留まりを向上することができる。
本実施の形態7においては、実施の形態4および5で用いた主端子5とパワー半導体素子3との接合を、接合箇所を複数としたように、実施の形態3における主端子10と絶縁基板2との間の接合においても、接合箇所を複数とする構成とした点が異なる。このように、主端子10と絶縁基板2との間の接合においても、接合の信頼性を向上することができる。
本実施の形態8においては、実施の形態6で用いた主端子5とパワー半導体素子3との接合において、ボンディングリボン7を形成しない箇所にも1つ以上の開口12を形成する構成としたが、実施の形態8における主端子10と絶縁基板2との間の接合においても、ボンディングリボン7を形成しない箇所にも1つ以上の開口12を形成する構成とした点が異なる。このように、主端子10に開口12を設けることで、主端子10と絶縁基板2との間の接合においても、封止樹脂11の注入性を向上することができる。
本実施の形態9においては、実施の形態1で用いた主端子5と接合するパワー半導体素子3を1つとした構成を、主端子5を複数のパワー半導体素子3に接合する構成とした点が異なる。
本実施の形態10においては、実施の形態1〜9で用いたケース型のパワーモジュールを、トランスファーモールド型のパワーモジュールとした点が異なる。このように、トランスファーモールド型としたことで、一括成形が可能となり製造コストが低減し、生産性を向上することが可能となる。
Claims (17)
- 一方の面に電極部が形成された基材部と、
前記基材部に対向させて配置された導体部と、
前記電極部と前記導体部の前記一方の面に対向する面とに接続された配線部と、
を備えたことを特徴とするパワーモジュール。 - 前記配線部は、前記配線部の一端が前記電極部と接合され、前記配線部の他端が前記導体部の前記一方の面と対向する面に接合されたことを特徴とする請求項1に記載のパワーモジュール。
- 前記導体部は、開口部を有し、前記開口部に対応する位置で前記配線部の他端が前記電極部に接合されたことを特徴とする請求項2に記載のパワーモジュール。
- 前記導体部は、開口部を有し、前記配線部は前記開口部を跨いで、両端が前記導体部と接合され、前記開口部に対応する位置で一部が前記電極部に接合されたことを特徴とする請求項1に記載のパワーモジュール。
- 前記開口部は、前記導体部に複数設けられたことを特徴とする請求項3または請求項4に記載のパワーモジュール。
- 前記導体部は、前記複数の開口部を跨いで前記配線部が形成されていることを特徴とする請求項5に記載のパワーモジュール。
- 前記導体部は、前記配線部が跨いで形成されていない前記開口部を有することを特徴とする請求項5に記載のパワーモジュール。
- 前記基材部は、第一の基材部と第二の基材部とを備えたことを特徴とする請求項1〜請求項7のいずれか1項に記載のパワーモジュール。
- 複数の前記第二の基材部を有することを特徴とする請求項8に記載のパワーモジュール。
- 前記第一の基材部は、絶縁基板であることを特徴とする請求項8または請求項9に記載のパワーモジュール。
- 前記第二の基材部は、半導体素子であることを特徴とする請求項8〜請求項10のいずれか1項に記載のパワーモジュール。
- 前記基材部、前記導電部、および前記帯状導電部がケースを用いて樹脂封止されたことを特徴とする請求項1〜請求項11のいずれか1項に記載のパワーモジュール。
- 前記基材部、前記導電部、および前記帯状導電部がトランスファーモールド樹脂を用いて封止されたことを特徴とする請求項1〜請求項11のいずれか1項に記載のパワーモジュール。
- 前記配線部は、ワイヤまたはリボンであることを特徴とする請求項1〜請求項13のいずれか1項に記載のパワーモジュール。
- 配線部を導体部に超音波接合を用いて接合する工程と、前記配線部を接合した面側が下面となるように前記導体部を回転させる工程と、前記配線部を基材部に形成された電極部に超音波接合を用いて接合する工程と、
を備えたことを特徴とするパワーモジュールの製造方法。 - 前記導体部は開口部を有し、前記開口部を通したボンディング冶具を用いて前記配線部を前記基材部に形成された前記電極部に超音波接合を用いて接合する工程とを特徴とする請求項15に記載のパワーモジュールの製造方法。
- 前記配線部は、ワイヤまたはリボンであることを特徴とする請求項15または請求項16に記載のパワーモジュールの製造方法。
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