JP5383621B2 - パワー半導体装置 - Google Patents
パワー半導体装置 Download PDFInfo
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- JP5383621B2 JP5383621B2 JP2010235094A JP2010235094A JP5383621B2 JP 5383621 B2 JP5383621 B2 JP 5383621B2 JP 2010235094 A JP2010235094 A JP 2010235094A JP 2010235094 A JP2010235094 A JP 2010235094A JP 5383621 B2 JP5383621 B2 JP 5383621B2
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- power semiconductor
- external terminal
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- 239000004065 semiconductor Substances 0.000 title claims description 127
- 238000004891 communication Methods 0.000 claims description 59
- 229920005989 resin Polymers 0.000 claims description 40
- 239000011347 resin Substances 0.000 claims description 40
- 238000012546 transfer Methods 0.000 claims description 40
- 238000005452 bending Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 26
- 239000002184 metal Substances 0.000 description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 21
- 238000005304 joining Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 18
- 239000010949 copper Substances 0.000 description 14
- 229910000679 solder Inorganic materials 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000843 powder Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 239000011889 copper foil Substances 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229920000647 polyepoxide Polymers 0.000 description 7
- 229910000881 Cu alloy Inorganic materials 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 4
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- 229910000838 Al alloy Inorganic materials 0.000 description 2
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 240000004050 Pentaglottis sempervirens Species 0.000 description 2
- 235000004522 Pentaglottis sempervirens Nutrition 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 230000007774 longterm Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000006664 bond formation reaction Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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Description
<A−1.構成>
図1は、本発明の実施の形態1にかかるパワー半導体装置を示す断面模式図である。図1に示すように、本実施の形態1のパワー半導体装置は、パワー半導体装置の熱を放熱する金属放熱体である金属板1の一方の面(上面)に、下地としての、高熱伝導性の絶縁層2が設けられている。さらにこの高熱伝導性の絶縁層2の上面には、金属箔の配線パターン3が形成されている。金属板1と高熱伝導性の絶縁層2と配線パターン3とで、回路基板である金属回路基板8を構成している。
次に、本実施の形態1におけるパワー半導体装置の製造方法の一例について説明する。本実施の形態1のパワー半導体装置は、例えば、金属板1として厚み3mmの銅板に、高熱伝導の絶縁層2としてBステージ状態のアルミナ粉末を含有するエポキシ樹脂シートを載せ、その上に厚み0.3mmの銅箔を重ねる。
図2は、本発明の実施の形態1にかかる外部装置であるプリント配線板13とパワー半導体装置とが外部端子10、外部端子11で接続されている断面模式図である。L字形状を有した外部端子10、直線形状を有した外部端子11において、外部端子10、外部端子11の一方の先端が連通部6内に挿入されていると同時に、他方の先端が外部装置であるプリント配線板13のスルーホール部14、またはランド部15に接合されることにより、パワー半導体装置とプリント配線板13に、外部端子10、外部端子11を用い一括で接続することが可能であるため、プロセス的にも簡単であると同時に、長期信頼性を向上させることが可能である。
本発明にかかる実施の形態1によれば、パワー半導体装置において、下地としての絶縁層2上の配線パターン3に裏面が接合され、裏面に対向する表面に表面電極を有する、パワー半導体素子5と、パワー半導体素子5の表面電極上、および/または配線パターン3上に底面が接合された、筒状の連通部6と、連通部6の上面を露出させる凹部20、凹部12を有し、連通部6の上面以外と、絶縁層2と、配線パターン3と、パワー半導体素子5とを覆うトランスファーモールド樹脂7と、一端が連通部6の上面に挿入され、他端が上方へ導かれた外部端子11、外部端子10とを備え、少なくとも1つの外部端子10は、両端部間においてL字曲折する曲折領域21を有し、曲折領域21は、トランスファーモールド樹脂7の凹部12に埋没することで、パワー半導体素子5上方において、沿面絶縁距離を保ちつつ装置上の端子間の距離を短くすることが可能となり、所望の位置に外部端子を引き回し、装置の小型化を実現することができる。
<B−1.構成>
図5〜9は、L字形状を有した外部端子において、連通部6内に接合される部位とプリント配線板13のスルーホール部14、またはランド部15に接合される部位とが各々1つ以上を有するL字形状を有した外部端子の構造図を示す。
本発明にかかる実施の形態2によれば、パワー半導体装置において、外部端子100〜105、外部端子110はその両端部にそれぞれ1または複数の接続部を有することで、発熱集中の度合と小型化の要請とを考慮しながら、接続部の形状、数量を最適化することが可能となる。
<C−1.構成>
図10は、L字形状を有した外部端子100の連通部6、さらにはプリント配線板13のスルーホール部14、ランド部15への接合方法として、はんだ接合を用いる場合の外部端子100の構造を示す。
本発明にかかる実施の形態3によれば、パワー半導体装置において、外部端子106、外部端子107の少なくともいずれかの端部は、プレスフィットを用いて接合されることで、はんだレス接合が可能になり、接合部の信頼性向上、組み立て加工費の低減が可能となる。
<D−1.構成>
パワー半導体装置上面に引き回された異電極の外部端子10間、さらには外部端子11間のトランスファーモールド樹脂7表面に、凸形状16が形成されたパワー半導体装置を図15に示す。
本発明にかかる実施の形態4によれば、パワー半導体装置において、トランスファーモールド樹脂7は、凹部20、凹部12を複数備え、トランスファーモールド樹脂7は、所定の凹部20、凹部12の間に、凸形状16および/または凹形状17を有することで、沿面距離を長くすることが出来るため、外部端子10間、外部端子11間の実質的な横距離を縮めることが可能になり、パワー半導体装置の小型化が可能となり、低コスト化が達成できる。
Claims (9)
- 下地上の配線パターンに裏面が接合され、前記裏面に対向する表面に表面電極を有する、パワー半導体素子と、
前記パワー半導体素子の前記表面電極上、および/または前記配線パターン上に底面が接合された、筒状の連通部と、
前記連通部の上面を露出させる凹部を有し、前記連通部の上面以外と、前記下地と、前記配線パターンと、前記パワー半導体素子とを覆うトランスファーモールド樹脂と、
一端が前記連通部の上面に挿入され、他端が上方へ導かれた外部端子とを備え、
少なくとも1つの前記外部端子は、両端部間においてL字曲折する曲折領域を有し、
前記曲折領域は、前記トランスファーモールド樹脂の前記凹部に埋没する、
パワー半導体装置。 - 前記外部端子の上方に配置された、プリント配線板をさらに備え、
前記外部端子の他端は、前記プリント配線板のスルーホール部、又はランド部に接合される、
請求項1に記載のパワー半導体装置。 - 前記外部端子は、前記曲折領域において、前記トランスファーモールド樹脂の前記凹部の側面に係合される突起を有する、
請求項1または2に記載のパワー半導体装置。 - 前記外部端子はその両端部にそれぞれ1または複数の接続部を有する、
請求項1〜3のいずれかに記載のパワー半導体装置。 - 前記外部端子の前記曲折領域は、前記外部端子の長さ方向と略直交する方向の幅が、前記外部端子のそれ以外の領域の幅より広い、
請求項1〜4のいずれかに記載のパワー半導体装置。 - 前記パワー半導体素子は、ワイドバンドギャップ半導体からなる、
請求項1〜5のいずれかに記載のパワー半導体装置。 - 前記外部端子の少なくともいずれかの端部は、プレスフィットを用いて接合される、
請求項1〜6のいずれかに記載のパワー半導体装置。 - 前記外部端子の少なくともいずれかの端部は、スプリングを用いて接合される、
請求項1〜7のいずれかに記載のパワー半導体装置。 - 前記トランスファーモールド樹脂は、前記凹部を複数備え、
前記トランスファーモールド樹脂は、所定の前記凹部の間に、凸形状および/または凹形状を有する、
請求項1〜8のいずれかに記載のパワー半導体装置。
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