JPWO2016136457A1 - パワーモジュール - Google Patents
パワーモジュール Download PDFInfo
- Publication number
- JPWO2016136457A1 JPWO2016136457A1 JP2017502045A JP2017502045A JPWO2016136457A1 JP WO2016136457 A1 JPWO2016136457 A1 JP WO2016136457A1 JP 2017502045 A JP2017502045 A JP 2017502045A JP 2017502045 A JP2017502045 A JP 2017502045A JP WO2016136457 A1 JPWO2016136457 A1 JP WO2016136457A1
- Authority
- JP
- Japan
- Prior art keywords
- wiring member
- main electrode
- power module
- adapter
- power semiconductor
- 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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- 239000004065 semiconductor Substances 0.000 claims abstract description 150
- 239000000758 substrate Substances 0.000 claims abstract description 124
- 239000000463 material Substances 0.000 claims abstract description 82
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims description 101
- 239000011347 resin Substances 0.000 claims description 101
- 239000004020 conductor Substances 0.000 claims description 74
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 239000003566 sealing material Substances 0.000 claims description 22
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 4
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 74
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- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 7
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 4
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- JVPLOXQKFGYFMN-UHFFFAOYSA-N gold tin Chemical compound [Sn].[Au] JVPLOXQKFGYFMN-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
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- 239000010703 silicon Substances 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
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- 238000003466 welding Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
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- 239000003779 heat-resistant material Substances 0.000 description 1
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- 238000009766 low-temperature sintering Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H01L24/91—Methods for connecting semiconductor or solid state bodies including different methods provided for in two or more of groups H01L24/80 - H01L24/90
- H01L24/92—Specific sequence of method steps
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- H01L23/043—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body
- H01L23/051—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having a conductive base as a mounting as well as a lead for the semiconductor body another lead being formed by a cover plate parallel to the base plate, e.g. sandwich type
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- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3142—Sealing arrangements between parts, e.g. adhesion promotors
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- H01L2224/37138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
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Abstract
Description
図1は本発明の実施の形態1によるパワーモジュールの断面模式図であり、図2は図1のアダプタを示す図である。図3は本発明の実施の形態1によるパワーモジュールの鳥瞰図であり、図4は図3のアダプタ内部構造を示す上面図である。図5は図4の配線部材を示す鳥瞰図であり、図6は図4のアダプタの裏面鳥瞰図である。図7及び図8は、図1のパワーモジュールの製造過程を示す図である。パワーモジュール100は、パワー半導体素子1と、パワー半導体素子1が搭載された回路基板であるセラミック基板2と、パワー半導体素子1の表面電極14に接続される配線部材を有するアダプタ10と、放熱フィン6とを備える。
図9は、本発明の実施の形態2によるパワーモジュールの断面模式図である。実施の形態2によるパワーモジュール100は、パワー半導体素子1の信号電極14sの周辺に開口部39を形成し、ワイヤ71によって信号電極14sと図示しない外部電極とを接続する例である。図9において、信号配線部材32は図示しない他のパワー半導体素子の信号電極や、パワー半導体素子1の微細ピッチでない信号電極14sに接続するものである。図9では、セラミック基板2の導体層22における信号配線部材32と接続する部分を導体層22xとし、銀シンター接合部42における導体層22xと信号配線部材32とを接合する部分を銀シンター接合部42xと表記した。
実施の形態3では、パワー半導体素子1の裏面に形成されたコレクタ電極(裏面主電極)13にセラミック基板2の導体層22を介して接続する主電極配線部材33を備えたパワーモジュール100を説明する。図10は本発明の実施の形態3によるパワーモジュールの鳥瞰図であり、図11は図10のアダプタの配線部材及びセラミック基板の導体層を示す鳥瞰図である。なお、図10、図11において、セラミック基板2のセラミック基材21、導体層23、放熱フィン6は省略した。主電極配線部材33は、裏面主電極であるコレクタ電極13に接続するので、裏面主電極配線部材である。
図12は本発明の実施の形態4によるパワーモジュールの断面模式図であり、図13は図12のアダプタ及びパワー半導体素子を示す図である。実施の形態4のパワーモジュール100は、実施の形態1のパワーモジュール100とは、パワー半導体素子1が2つ搭載され、1つの主電極配線部材31で2つのパワー半導体素子1の表面主電極に接続している点で異なる。ここでは、2つのパワー半導体素子1として、スイッチング素子1iとダイオード1dの例を説明する。スイッチング素子1iは、例えばIGBTである。
図16は、本発明の実施の形態5によるパワーモジュールの断面模式図である。実施の形態5のパワーモジュール100は、銀シンター接合部41、42が隙間封止材81により覆われた点で、実施の形態1のパワーモジュール100と異なる。実施の形態1で説明したように、パワー半導体素子1をアダプタ10及びセラミック基板2に銀シンター接合部41、42を介して接合した後に、セラミック基板2を放熱グリス5を用いて放熱フィン6に搭載して接着する。最後に、必要に応じて、ワイヤ接続部323とワイヤ71のワイヤボンド接合部やワイヤ接続部313とワイヤ7のワイヤボンド接合部などが浸かるようにゲル(シリコーン樹脂)やポッティング封止樹脂(エポキシ)などで封止する。この際、ゲルやポッティング封止樹脂は、アダプタ10におけるセラミック基板2と対向する対向部からセラミック基板2から離れる方向に延伸する外周部と、セラミック基板2におけるアダプタ10の外周部周辺とをも同時に被覆している。
Claims (21)
- 回路基板に搭載されたパワー半導体素子と、前記パワー半導体素子の表面主電極に接続されたアダプタを備えたパワーモジュールであって、
前記アダプタは、前記パワー半導体素子の前記表面主電極に接続された主電極配線部材を備え、
前記主電極配線部材は、前記パワー半導体素子の前記表面主電極に接続された素子接続部と、前記素子接続部の外側に配置されると共に前記回路基板に接続された基板接続部と、前記素子接続部の外側に配置されると共に外部電極に接続材を介して接続する接続材接続部を備えることを特徴とするパワーモジュール。 - 前記主電極配線部材の前記接続材接続部は、前記回路基板と実質的に平行に配置されたことを特徴とする請求項1記載のパワーモジュール。
- 前記主電極配線部材の前記接続材接続部は、前記素子接続部の逆側面と同じ高さに、又は前記素子接続部の逆側面よりも低い高さに配置されたことを特徴とする請求項1または2に記載のパワーモジュール。
- 前記アダプタは、前記パワー半導体素子の表面信号電極に接続された信号配線部材を備え、
前記信号配線部材は、前記パワー半導体素子の前記表面信号電極に接続された素子信号接続部と、前記素子信号接続部の外側に配置されると共に前記回路基板に接続された基板信号接続部と、前記素子信号接続部及び前記基板信号接続部が配置された面と逆側である逆側面に、前記素子信号接続部の外側に配置されると共に外部電極に接続材を介して接続する接続材信号接続部を備えることを特徴とする請求項1から3のいずれか1項に記載のパワーモジュール。 - 前記回路基板は、前記パワー半導体素子の裏面主電極に接続された導体層を備え、
前記アダプタは、前記導体層を介して前記パワー半導体素子の前記裏面主電極に接続された裏面主電極配線部材を備え、
前記裏面主電極配線部材は、前記導体層に対する接続面と逆側である逆側面に、外部電極に接続材を介して接続する接続材接続部を備えることを特徴とする請求項1から3のいずれか1項に記載のパワーモジュール。 - 前記回路基板は、前記パワー半導体素子の裏面主電極に接続された導体層を備え、
前記アダプタは、前記導体層を介して前記パワー半導体素子の前記裏面主電極に接続された裏面主電極配線部材を備え、
前記裏面主電極配線部材は、前記導体層に対する接続面と逆側である逆側面に、外部電極に接続材を介して接続する接続材接続部を備えることを特徴とする請求項4記載のパワーモジュール。 - 前記パワー半導体素子であるスイッチング素子及びダイオードが前記回路基板に搭載され、
前記アダプタの前記主電極配線部材は、前記主電極配線部材が前記スイッチング素子及び前記ダイオードの各表面主電極に接続されたことを特徴とする請求項1から3のいずれか1項に記載のパワーモジュール。 - 前記パワー半導体素子であるスイッチング素子及びダイオードが前記回路基板に搭載され、
前記アダプタの前記主電極配線部材は、前記主電極配線部材が前記スイッチング素子及び前記ダイオードの各表面主電極に接続されたことを特徴とする請求項4記載のパワーモジュール。 - 前記パワー半導体素子であるスイッチング素子及びダイオードが前記回路基板に搭載され、
前記アダプタの前記主電極配線部材は、前記主電極配線部材が前記スイッチング素子及び前記ダイオードの各表面主電極に接続されたことを特徴とする請求項5記載のパワーモジュール。 - 前記パワー半導体素子であるスイッチング素子及びダイオードが前記回路基板に搭載され、
前記アダプタの前記主電極配線部材は、前記主電極配線部材が前記スイッチング素子及び前記ダイオードの各表面主電極に接続されたことを特徴とする請求項6記載のパワーモジュール。 - 前記主電極配線部材は、前記素子接続部が配置された面と逆側である逆側面が樹脂により被覆されたことを特徴とする請求項1から3、及び7のいずれか1項に記載のパワーモジュール。
- 前記主電極配線部材は、前記素子接続部が配置された面と逆側である逆側面が樹脂により被覆され、
前記信号配線部材は、前記素子信号接続部が配置された面と逆側である逆側面が前記樹脂により被覆されたことを特徴とする請求項4または8に記載のパワーモジュール。 - 前記主電極配線部材は、前記素子接続部が配置された面と逆側である逆側面が樹脂により被覆され、
前記裏面主電極配線部材は、前記導体層に対する接続面と逆側である逆側面の一部が前記樹脂により被覆されたことを特徴とする請求項5または9に記載のパワーモジュール。 - 前記主電極配線部材は、前記素子接続部が配置された面と逆側である逆側面が樹脂により被覆され、
前記信号配線部材は、前記素子信号接続部が配置された面と逆側である逆側面が前記樹脂により被覆され、
前記裏面主電極配線部材は、前記導体層に対する接続面と逆側である逆側面の一部が前記樹脂により被覆されたことを特徴とする請求項6または10に記載のパワーモジュール。 - 前記主電極配線部材の前記素子接続部は隙間封止材により被覆されており、
前記アダプタにおける前記回路基板と対向する対向部から前記回路基板から離れる方向に延伸する外周部と、前記回路基板とが外周部の封止材により被覆されており、
前記隙間封止材は、前記外周部の封止材よりも耐熱性が高いことを特徴とする請求項11または13に記載のパワーモジュール。 - 前記主電極配線部材の前記素子接続部、及び前記信号配線部材の前記素子信号接続部は隙間封止材により被覆されており、
前記アダプタにおける前記回路基板と対向する対向部から前記回路基板から離れる方向に延伸する外周部と、前記回路基板とが外周部の封止材により被覆されており、
前記隙間封止材は、前記外周部の封止材よりも耐熱性が高いことを特徴とする請求項12または14に記載のパワーモジュール。 - 前記アダプタは、インサートモールド工法により熱可塑性インサートモールド樹脂で一部が被覆されたアダプタであり、
前記樹脂は、前記熱可塑性インサートモールド樹脂であり、
前記パワー半導体素子は、軟化した前記熱可塑性インサートモールド樹脂により被覆されたことを特徴とする請求項11から14のいずれか1項に記載のパワーモジュール。 - 前記パワー半導体素子は、前記表面主電極よりも小電流が流れる表面信号電極を備え、
前記表面信号電極の上方に、前記表面信号電極から前記表面信号電極に接続する接続材が配置される開口部を備えたことを特徴とする請求項1から3のいずれか1項に記載のパワーモジュール。 - 前記接続材は、アルミ又は銅製の、ワイヤ又はリボンであることを特徴とする請求項1から18のいずれか1項に記載のパワーモジュール。
- 前記パワー半導体素子は、ワイドバンドギャップ半導体材料により形成されていることを特徴とする請求項1から19のいずれか1項に記載のパワーモジュール。
- 前記ワイドバンドギャップ半導体材料は、炭化ケイ素、窒化ガリウム系材料、またはダイヤモンドのうちのいずれかであることを特徴とする請求項20記載のパワーモジュール。
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US10559538B2 (en) | 2020-02-11 |
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