JP6233285B2 - 半導体モジュール、電力変換装置 - Google Patents
半導体モジュール、電力変換装置 Download PDFInfo
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Description
図1は、本発明の実施の形態1に係る半導体モジュール10の断面図である。半導体モジュール10は、ベース板11と壁部12を有するケース13を備えている。ケース13には信号端子14と電力端子16が埋め込まれている。信号端子14はケース13の内部に露出する部分とケース13の外部に露出する部分を備えている。電力端子16も同様である。
図3は、実施の形態2に係る半導体モジュールの断面図である。ケース13の中の、磁気シールド32の上には、制御回路基板60が設けられている。制御回路基板60は例えばプリント基板である。制御回路基板60の上面と下面にはそれぞれ電子部品62、64が固定されている。制御回路基板60には、半導体モジュールの外部に伸びる端子66が固定されている。端子66から制御回路基板60に伝送された制御信号は、電子部品62、64で予め定められた処理を受け、信号端子14とワイヤ28aを経由して半導体素子24に達する。
図5は、実施の形態3に係る半導体モジュールの断面図である。磁気シールド32の中には、封止樹脂30よりも熱伝導率の高い物質を混入させている。これにより、磁気シールド32の熱伝導率は、封止樹脂30の熱伝導率より高くなっている。例えば、エポキシ樹脂で形成された封止樹脂30の熱伝導率は0.21[W・m-1・K-1]であるので、その熱伝導率より高い熱伝導率を有する物質を磁気シールド32に混入する。磁気シールド32に含有させた磁性体がフェライト粉末の場合、そのフェライト粉末が「封止樹脂よりも熱伝導率の高い物質」に該当することが多い。磁気シールドの熱伝導率を十分に高めるためには、磁気シールドに金、銀、又は銅などの熱伝導率が非常に高い物質を混入させることが好ましい。
図6は、本発明の実施の形態4に係る電力変換装置の概念図である。この電力変換装置は筐体90を備えている。筐体90の中には、実施の形態1で説明した半導体モジュール10が設けられている。半導体モジュール10を実施の形態2又は3の半導体モジュールに置き換えても良い。筐体90の中には、半導体素子に対し制御信号を伝送する制御回路92が設けられている。制御回路92は半導体モジュール10の外部に設けられている。
Claims (14)
- ケースと、
前記ケースの中に設けられた、電流をスイッチングする半導体素子と、
前記ケースの中に設けられた、前記半導体素子を覆う封止樹脂と、
前記封止樹脂に接する、磁性体を含有する磁気シールドと、
前記ケースの中に埋め込まれた、磁性体を含有する埋め込み磁気シールドと、を備えたことを特徴とする半導体モジュール。 - 前記磁気シールドは、前記封止樹脂の上面全体に形成されたことを特徴とする請求項1に記載の半導体モジュール。
- 前記埋め込み磁気シールドは前記半導体素子の側面を囲むことを特徴とする請求項1又は2に記載の半導体モジュール。
- 前記埋め込み磁気シールドは前記半導体素子の下面側に設けられたことを特徴とする請求項1〜3のいずれか1項に記載の半導体モジュール。
- 前記ケースの中の、前記磁気シールドの上に設けられた制御回路基板と、
前記制御回路基板に固定された電子部品と、を備えたことを特徴とする請求項1〜4のいずれか1項に記載の半導体モジュール。 - ケースと、
前記ケースの中に設けられた、電流をスイッチングする半導体素子と、
前記ケースの中に設けられた、前記半導体素子を覆う封止樹脂と、
前記封止樹脂に接する、磁性体を含有する磁気シールドと、
前記ケースの中の、前記磁気シールドの上に設けられた制御回路基板と、
前記制御回路基板に固定された電子部品と、を備えたことを特徴とする半導体モジュール。 - 前記電子部品は磁界の授受により通信を行うマイクロトランスを備えることを特徴とする請求項5又は6に記載の半導体モジュール。
- 前記磁気シールドの熱伝導率は、前記封止樹脂の熱伝導率より高く、
前記磁気シールドの上面の表面粗さは、前記封止樹脂の上面の表面粗さより大きいことを特徴とする請求項1〜7のいずれか1項に記載の半導体モジュール。 - 前記磁気シールドは、磁性体を含有する樹脂であることを特徴とする請求項1〜8のいずれか1項に記載の半導体モジュール。
- 前記磁気シールドは、フェライト粉末を含有したエポキシ樹脂であることを特徴とする請求項9に記載の半導体モジュール。
- 前記磁気シールドは、液体、ゲル、ゴム、又はエラストマーのいずれかであることを特徴とする請求項1〜8のいずれか1項に記載の半導体モジュール。
- 前記半導体素子はワイドバンドギャップ半導体によって形成されていることを特徴とする請求項1〜11のいずれか1項に記載の半導体モジュール。
- 前記ワイドバンドギャップ半導体は、炭化珪素、窒化ガリウム系材料又はダイヤモンドであることを特徴とする請求項12に記載の半導体モジュール。
- ケースと、前記ケースの中に設けられた、電流をスイッチングする半導体素子と、前記ケースの中に設けられた、前記半導体素子を覆う封止樹脂と、前記封止樹脂に接する、磁性体を含有する磁気シールドと、前記ケースの中に埋め込まれた、磁性体を含有する埋め込み磁気シールドと、を備えた半導体モジュールと、
前記半導体モジュールの外部に設けられ、前記半導体素子に対し制御信号を伝送する制御回路と、を備えた電力変換装置。
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