JP2021197522A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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Abstract
Description
図1は実施の形態1に係る半導体装置100の構成の概要を示す上面図、図2は図1のA−A断面位置で切断した半導体装置100の要部断面図である。図1は封止材8を取り除いて示した図で、破線は電界抑制板9で覆われた半導体素子1の外形である。半導体装置100は、半導体素子1を内蔵する半導体モジュール11と、半導体モジュール11が備えた絶縁放熱部材3に熱的に接続されたヒートシンク4と、電界抑制板9とを有し、電力変換を行う装置などに用いられる。
半導体モジュール11は、図2に示すように、板状の半導体素子1、半導体素子1の一方の面に電気的に接続された導体である第1のリードフレーム6、一方の面が半導体素子1の他方の面に熱的かつ電気的に接続された放熱板2、放熱板2の一方の面に電気的に接続された導体である第2のリードフレーム10、半導体素子1と第1のリードフレーム6と第2のリードフレーム10と放熱板2とを封止する樹脂部材である封止材8、及び封止材8から露出した放熱板2の他方の面に熱的に接続された絶縁放熱部材3を有する。また、半導体モジュール11は一部が封止材8から露出した制御端子7を備える。制御端子7は、半導体素子1の一方の面に電気的に接続された導体であるワイヤ導体5を介して、半導体素子1のボンディングパッド(図示せず)と電気的に接続されている。
本願の要部である電界抑制板9の構成について説明する。電界抑制板9は、図2に示すように、板状の覆い部分9aと接続部分9bとを備える。覆い部分9aは、ガードリング1a上の局所的に高電界が発生する領域を含むように半導体素子1の一方の面を覆って、半導体素子1とは間隔を空けて対向し、封止材8に封止されている。接続部分9bは覆い部分9aからヒートシンク4の側に延出し、ヒートシンク4と熱的かつ電気的に接続されている。ヒートシンク4は接地されているため、ヒートシンク4に電気的に接続された電界抑制板9の電位も接地電位となる。電界抑制板9の接続部分9bは、半導体モジュール11の外部でヒートシンク4と接続されている。接続部分9bを半導体モジュール11の外部でヒートシンク4と接続することで、接続部分9bとヒートシンク4との接続を、例えばねじ止めで行うことができる。接続部分9bとヒートシンク4との接続にねじ止めを採用することで、製造工程が簡易になり、半導体装置100の生産性を向上させることができる。なお、半導体素子1の一方の面と電界抑制板9の覆い部分9aとの間の距離は、例えば、1mm以内である。
実施の形態2に係る半導体装置100について説明する。図3は、実施の形態2に係る半導体装置100の構成の概要を示す断面図である。図3は図1のA−A断面位置と同等の位置で切断した半導体装置100の要部断面図である。実施の形態2に係る半導体装置100は、実施の形態1とは接続部分9bとヒートシンク4とを接続する箇所が異なる構成になっている。
実施の形態3に係る半導体装置100について説明する。図4は実施の形態3に係る半導体装置100の電界抑制板9の構成の概要を示す図で、図4(a)は上面図、図4(b)は側面図である。実施の形態3に係る半導体装置100は、電界抑制板9が貫通孔9cを備えた構成になっている。
実施の形態4に係る半導体装置100について説明する。図5は実施の形態4に係る半導体装置100の構成の概要を示す図で、図5(a)は上面図、図5(b)は図5(a)のB−B断面位置で切断した断面図である。図6は半導体装置100の電界抑制板9の構成の概要を示す図で、図6(a)は上面図、図6(b)は側面図である。図5(a)は封止材8を取り除いて示した図で、電界抑制板9は一点鎖線で外形のみを示している。実施の形態4に係る半導体装置100は、実施の形態1とはワイヤ導体5および第1のリードフレーム6と半導体素子1との接続の構成が異なっている。
従って、例示されていない無数の変形例が、本願明細書に開示される技術の範囲内において想定される。例えば、少なくとも1つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも1つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。
Claims (8)
- 板状の半導体素子、前記半導体素子の一方の面に電気的に接続された導体、一方の面が前記半導体素子の他方の面に熱的かつ電気的に接続された放熱板、前記半導体素子と前記導体と前記放熱板とを封止する樹脂部材、及び前記樹脂部材から露出した前記放熱板の他方の面に熱的に接続された絶縁放熱部材を有した半導体モジュールと、
前記絶縁放熱部材に熱的に接続されたヒートシンクと、
前記半導体素子の一方の面を覆って間隔を空けて対向し、前記樹脂部材に封止されている板状の覆い部分、及び前記覆い部分から前記ヒートシンクの側に延出し、前記ヒートシンクと熱的かつ電気的に接続されている接続部分を有する電界抑制板と、を備えた半導体装置。 - 前記電界抑制板の接続部分は、前記半導体モジュールの外部で前記ヒートシンクと接続されている請求項1に記載の半導体装置。
- 前記電界抑制板の接続部分は、前記半導体モジュールの内部で前記ヒートシンクと接続されている請求項1に記載の半導体装置。
- 前記電界抑制板は、前記電界抑制板の前記覆い部分に貫通孔が設けられている請求項1から3のいずれか1項に記載の半導体装置。
- 前記導体が、前記貫通孔を貫通して延出した請求項4に記載の半導体装置。
- 導電性プラスチックからなる前記電界抑制板を備えた請求項1から5のいずれか1項に記載の半導体装置。
- 前記半導体素子の一方の面と前記電界抑制板の前記覆い部分との間の距離は1mm以内である請求項1から6のいずれか1項に記載の半導体装置。
- 炭化ケイ素からなる前記半導体素子を備えた請求項1から7のいずれか1項に記載の半導体装置。
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JPH0697321A (ja) * | 1992-06-04 | 1994-04-08 | Shinko Electric Ind Co Ltd | 半導体装置 |
JP2012159935A (ja) * | 2011-01-31 | 2012-08-23 | Murata Mfg Co Ltd | 電子部品モジュール、電子部品モジュールの製造方法、多機能カード |
WO2015133024A1 (ja) * | 2014-03-06 | 2015-09-11 | 三菱電機株式会社 | 電力用半導体装置 |
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JPH0697321A (ja) * | 1992-06-04 | 1994-04-08 | Shinko Electric Ind Co Ltd | 半導体装置 |
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