JP6689406B2 - 半導体装置および電力変換装置 - Google Patents
半導体装置および電力変換装置 Download PDFInfo
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Description
図1は、本実施の形態1における半導体装置の平面図である。本実施の形態1における半導体装置は、例えばモータの駆動に使用される三相(U相、V相、W相)一体型の半導体モジュール(即ち、6個のスイッチング素子を搭載した半導体装置)である。
本実施の形態1における半導体装置は、絶縁基板1上に配置された導電層11と、導電層11の前記絶縁基板1と反対側の面に、互いに隙間を隔てて接合された第1の半導体素子(即ちスイッチング素子S1)および第2の半導体素子(即ち還流ダイオードD1)と、第1の半導体素子の導電層11と反対側の面および第2の半導体素子の導電層11と反対側の面に、隙間にまたがって接合された電極部材21と、導電層11、第1の半導体素子、第2の半導体素子、電極部材21を封止する樹脂2と、を備え、導電層11の絶縁基板1と反対側の隙間に対応する面には、隙間に沿って凹状パターン4が形成されている。
図6は、実施の形態1の第1の変形例における半導体装置の断面図である。図6の断面は、図2中の線分A−Aに沿った半導体装置の断面に対応している。
図7は、実施の形態1の第2の変形例における半導体装置の平図である。図7は、図1における領域R1を拡大した半導体装置の平面図に対応している。
図8は、実施の形態1の第3の変形例における半導体装置の断面図である。図8の断面は、図2中の線分B−Bに沿った半導体装置の断面に対応している。
図9は、実施の形態1の第4の変形例における半導体装置の断面図である。図9の断面は、図2中の線分B−Bに沿った半導体装置の断面に対応している。
図10は、本実施の形態2における半導体装置の平面図である。図10は、図1における領域R1を拡大した半導体装置の平面図に対応している。また、図11は、図10中の線分C−Cに沿った半導体装置の断面図である。
本実施の形態2における半導体装置において、凹状パターン5は、複数の凹部51を備える。従って、凹状パターンが複数の凹部51を備えることにより、半導体装置の内部に樹脂2を注入する際、トンネル状の空間において樹脂2の流路を広くすることが可能である。よって、トンネル状の空間において樹脂2の流路が広くなるため、スイッチング素子S1と還流ダイオードD1との隙間において樹脂2の内部に気泡が残留することを抑制できる。従って、樹脂2の内部において気泡の残留が抑制されることにより、半導体装置の信頼性および絶縁性の低下を抑制することが可能である。
図12は、本実施の形態3における半導体装置の断面図である。図12の断面は、図2中の線分A−Aに沿った半導体装置の断面に対応している。
図13は、実施の形態3の変形例における半導体装置の断面図である。本変形例において、溝211Aは、実施の形態3における溝211と同様に、電極部材21の導電層11側の面に平面視でスイッチング素子S1と還流ダイオードD1との隙間に沿って形成される。図13に示すように、溝211Aは奥側の幅よりも表面側の幅が大きくなっている。
本実施の形態は、上述した実施の形態1から3のいずれかにおける半導体装置を電力変換装置に適用したものである。本発明は特定の電力変換装置に限定されるものではないが、以下、実施の形態4として、三相インバータの電力変換装置について説明する。
本実施の形態4における電力変換装置200は、入力される電力を変換して出力する主変換回路201と、主変換回路201を駆動する駆動信号を、主変換回路201に出力する駆動回路202と、駆動回路202を制御する制御信号を、駆動回路202に出力する制御回路203と、を備え、主変換回路201は、実施の形態1から3のいずれかの半導体装置を少なくとも1つ備える。従って、本実施の形態4における電力変換装置200の信頼性および絶縁性の低下を抑制することが可能である。また、電力変換装置200の製造コストの増大も抑制することが可能である。
Claims (7)
- 絶縁基板(1)上に配置された導電層(11)と、
前記導電層(11)の前記絶縁基板(1)と反対側の面に、互いに隙間を隔てて接合された第1の半導体素子および第2の半導体素子と、
前記第1の半導体素子の前記導電層(11)と反対側の面および前記第2の半導体素子の前記導電層(11)と反対側の面に、前記隙間にまたがって接合された電極部材(21)と、
前記導電層(11)、前記第1の半導体素子、前記第2の半導体素子、前記電極部材(21)を封止する樹脂(2)と、
を備え、
前記導電層(11)の前記絶縁基板(1)と反対側の前記隙間に対応する面には、前記隙間に沿って延在する溝を備えた凹状パターン(4)が形成されており、
前記凹状パターン(4)の前記溝の両端部分のそれぞれにおいて、端に向かって前記溝の幅が広くなる、
半導体装置。 - 絶縁基板(1)上に配置された導電層(11)と、
前記導電層(11)の前記絶縁基板(1)と反対側の面に、互いに隙間を隔てて接合された第1の半導体素子および第2の半導体素子と、
前記第1の半導体素子の前記導電層(11)と反対側の面および前記第2の半導体素子の前記導電層(11)と反対側の面に、前記隙間にまたがって接合された電極部材(21)と、
前記導電層(11)、前記第1の半導体素子、前記第2の半導体素子、前記電極部材(21)を封止する樹脂(2)と、
を備え、
前記導電層(11)の前記絶縁基板(1)と反対側の前記隙間に対応する面には、前記隙間に沿って延在する溝を備えた凹状パターン(4)が形成されており、
前記凹状パターン(4)の前記溝の両端部分のそれぞれから中間部分に向けて、前記溝の深さが小さくなるか、又は大きくなる、
半導体装置。 - 前記凹状パターン(4,5)は、前記導電層(11)の一辺から前記導電層(11)の他辺まで形成されている、
請求項1又は請求項2に記載の半導体装置。 - 前記電極部材(21)の前記導電層(11)側の面には、平面視で前記隙間に沿って溝(211)が形成されている、
請求項1から請求項3のいずれか一項に記載の半導体装置。 - 前記電極部材(21)の前記溝(211A)は、奥側の幅よりも表面側の幅が大きい、
請求項4に記載の半導体装置。 - 前記第1の半導体素子は、上面および下面のそれぞれに主電極を備えたスイッチング素子S1であり、
前記第2の半導体素子は、上面および下面のそれぞれに主電極を備えた還流ダイオードD1である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 入力される電力を変換して出力する主変換回路(201)と、
前記主変換回路を駆動する駆動信号を、前記主変換回路に出力する駆動回路(202)と、
前記駆動回路を制御する制御信号を、前記駆動回路に出力する制御回路(203)と、
を備え、
前記主変換回路(201)は、請求項1から請求項6のいずれか一項に記載の半導体装置を少なくとも1つ備える、
電力変換装置(200)。
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