JP7132340B2 - 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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- JP7132340B2 JP7132340B2 JP2020542477A JP2020542477A JP7132340B2 JP 7132340 B2 JP7132340 B2 JP 7132340B2 JP 2020542477 A JP2020542477 A JP 2020542477A JP 2020542477 A JP2020542477 A JP 2020542477A JP 7132340 B2 JP7132340 B2 JP 7132340B2
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Description
図1~図8を用いて、実施の形態1に係る半導体装置100の構成を説明する。なお、図2では、説明の便宜のため、封止樹脂9および第2配線部材61は図示されていない。図1に示されるように、半導体装置100は、半導体素子1と、接合材2と、ヒートスプレッダ3と、封止樹脂9とを含んでいる。半導体装置100は、配線接合材5と、金属層7と、絶縁層8と、第1配線部材60と、第2配線部材61とをさらに含んでいてもよい。半導体装置100は、電力用のパワー半導体装置である。
実施の形態1に係る半導体装置100によれば、図3に示されるように、露出面1eは、第1外周端1oと接合材2との間に配置されている。第1外周端1oおよび露出面1eは、接合材2から露出している。このため、接合材2は、第1外周端1oに達していない。よって、半導体素子1の端部に生じる熱応力を小さくすることができる。
次に、図11~図13を用いて、実施の形態2に係る半導体装置100の構成を説明する。実施の形態2は、特に説明しない限り、上記の実施の形態1と同一の構成および作用効果を有している。したがって、上記の実施の形態1と同一の構成には同一の符号を付し、説明を繰り返さない。
実施の形態2に係る半導体装置100によれば、図12に示されるように、ヒートスプレッダ3は、周辺部32をさらに含んでいる。周辺部32は、突出部31から隙間を空けて突出部31を取り囲んでいる。このため、突出部31が周辺部32に取り囲まれていない場合に比べて、ヒートスプレッダ3を切削する加工を減らすことが可能となる。よって、ヒートスプレッダ3の加工に要する工程が簡略化され得る。したがって、半導体装置100の製造コストを小さくすることができる。
次に、図14を用いて、実施の形態3に係る半導体装置100の構成を説明する。実施の形態3は、特に説明しない限り、上記の実施の形態1と同一の構成および作用効果を有している。したがって、上記の実施の形態1と同一の構成には同一の符号を付し、説明を繰り返さない。
実施の形態3に係る半導体装置100によれば、図14に示されるように、半導体装置100は、ケース4をさらに含んでいる。ケース4および金属層7は、半導体装置100の筐体として構成されている。このため、図示されない冷却器および図示されない外部配線などを半導体装置100の筐体に容易に接続することができる。よって、半導体装置100の製造工程が簡略化されるため、半導体装置100の製造コストを小さくすることができる。
本実施の形態は、上述した実施の形態1~実施の形態3にかかる半導体装置を電力変換装置に適用したものである。本開示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、三相のインバータに本開示を適用した場合について説明する。
Claims (7)
- 第1外周端を有する主面を含む半導体素子と、
前記主面に配置された接合材と、
前記接合材によって前記主面に接合されたヒートスプレッダと、
前記半導体素子と、前記接合材と、前記ヒートスプレッダとを封止する封止樹脂とを備え、
前記ヒートスプレッダは、前記接合材に対して前記半導体素子とは反対側に配置された本体部と、前記第1外周端よりも内側において前記本体部から前記主面に向かって突出した突出部とを含み、
前記突出部は、突出面を含み、かつ前記接合材によって前記主面に接合されており、
前記半導体素子は、前記接合材によって前記突出部に接合された第1電極を含み、
前記主面は、前記第1外周端と前記接合材との間に配置された露出面を有し、
前記第1外周端および前記露出面は、前記接合材から露出し、かつ前記封止樹脂に封止され、
前記第1電極が前記露出面を有する前記主面を含んでおり、
前記接合材は、前記突出面を延長した位置で接する第1接合部と、第2接合部とを含んでおり、
前記第1接合部は、前記第1外周端よりも内側において高さ位置で前記主面から前記突出面まで延びており、
前記第1接合部の寸法は、前記突出面を延長した位置を起点として前記突出面から前記主面に向かって大きくなり、
前記第2接合部は、前記第1外周端よりも内側において高さ位置で前記突出面から前記本体部に向かって延びている、半導体装置。 - 前記接合材は、前記主面に配置された第2外周端を含み、
前記露出面を挟む前記第1外周端と前記第2外周端との距離は、50μm以上300μm以下である、請求項1に記載の半導体装置。 - 前記突出部は、第3外周端を有しかつ前記接合材に接合された突出面を含み、
前記突出面に沿った前記第1外周端と前記第3外周端との距離は、50μm以上300μm以下である、請求項2に記載の半導体装置。 - 前記ヒートスプレッダは、前記本体部から前記主面に向かって突出しかつ前記接合材から離れて配置された周辺部をさらに含み、
前記周辺部は、前記突出部から隙間を空けて前記突出部を取り囲んでいる、請求項1~3のいずれか1項に記載の半導体装置。 - 前記封止樹脂の材料は、トランスファーモールド樹脂である、請求項1~4のいずれか1項に記載の半導体装置。
- 内部空間を含むケースをさらに備え、
前記内部空間に前記ヒートスプレッダと、前記接合材と、前記半導体素子とが配置された状態で、前記封止樹脂は、前記ケースの前記内部空間に充填されている、請求項1~4のいずれか1項に記載の半導体装置。 - 請求項1~6のいずれか1項に記載の前記半導体装置を有し、入力される電力を変換して出力する主変換回路と、
前記主変換回路を制御する制御信号を前記主変換回路に出力する制御回路とを備えた電力変換装置。
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WO2017099122A1 (ja) | 2015-12-11 | 2017-06-15 | ローム株式会社 | 半導体装置 |
WO2018179981A1 (ja) | 2017-03-29 | 2018-10-04 | トヨタ自動車株式会社 | 半導体装置 |
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WO2017099122A1 (ja) | 2015-12-11 | 2017-06-15 | ローム株式会社 | 半導体装置 |
US20190043790A1 (en) | 2017-01-05 | 2019-02-07 | Stmicroelectronics, Inc. | Modified leadframe design with adhesive overflow recesses |
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