JP2019079905A - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- JP2019079905A JP2019079905A JP2017205040A JP2017205040A JP2019079905A JP 2019079905 A JP2019079905 A JP 2019079905A JP 2017205040 A JP2017205040 A JP 2017205040A JP 2017205040 A JP2017205040 A JP 2017205040A JP 2019079905 A JP2019079905 A JP 2019079905A
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Abstract
Description
(装置構成)
図1は、実施の形態1における半導体装置100の構成を示す断面図である。図2は、実施の形態1における半導体装置100の構成を示す上面図である。半導体装置100は、金属板1、半導体素子2、配線板3、導体およびその導体とは異なる別の導体を含む。以下の実施の形態において、導体を第1導体4、別の導体を第2導体5という。また、実施の形態1においては、半導体装置100は、さらに放熱板6および封止材7を含む。
実施の形態1における半導体装置100の製造方法について説明する前に、前提技術における半導体装置の製造方法における課題を述べる。一般的に、半導体素子2の表面電極から外部電極への配線の接続は、アルミ等の金属ワイヤをワイヤボンディングにより配線され、金属ワイヤと電極とは固相接合される。大電流をスイッチング制御する電力半導体装置には、複数の金属ワイヤが並列に配設されており、また、各ワイヤの線径は500μm程度を有する太い金属ワイヤが採用されていた。しかし、電力半導体装置で扱う電気容量または接合箇所の寿命において限界が生じている。電力半導体装置の小型化が進むにことにより、半導体素子のサイズも小さくなるため、金属ワイヤの並列数を増加させることは困難である。また、従来よりも大きい線径を有する金属ワイヤが採用される場合、金属ワイヤの接合面である表面電極において印加する圧力、振動を高めて接合する必要がある。これらの圧力または応力が過大な場合、半導体素子が破壊され得る。さらに、電力半導体装置は、過酷なヒートサイクル、パワーサイクルに耐える必要がある。電力半導体装置の仕様出力は、数百ボルト、数千ボルトと増大し続ける傾向にある。配線の接続に関して、高電流に対応し、電気抵抗の低減を促し、かつ過酷な環境下でも、接合部の信頼性および高寿命化を図る必要がある。
実施の形態2における半導体装置および半導体装置の製造方法を説明する。
実施の形態3における半導体装置および半導体装置の製造方法を説明する。なお、実施の形態1または2と同様の構成および動作については説明を省略する。
実施の形態4における半導体装置および半導体装置の製造方法を説明する。なお、他の実施の形態と同様の構成および動作については説明を省略する。
実施の形態5における半導体装置および半導体装置の製造方法を説明する。なお、他の実施の形態と同様の構成および動作については説明を省略する。
Claims (24)
- 金属板と、
表面に設けられる第1電極と裏面に設けられる第2電極とを含み、前記第2電極が前記金属板に接続されて前記金属板上に保持される半導体素子と、
互いに対面する第1面および第2面を含み、前記第1面が前記半導体素子の前記第1電極に対面して接続される配線板と、
板状の形状を有し、一端が外部に接続可能に配置され、かつ、他端の一方面側が前記配線板の前記第2面に固定されて、前記半導体素子の前記第1電極に配線される導体と、を備え、
前記導体は、前記他端の前記一方面に少なくとも1つの凸型の段差を含み、
前記導体が含む前記少なくとも1つの凸型の段差の頂部は、前記配線板の前記第2面に対して平行な接触面を含み、
前記導体の前記他端は、前記接触面と前記配線板の前記第2面とが密着することにより前記配線板の前記第2面に固定される半導体装置。 - 前記導体は、
前記一方面の前記少なくとも1つの凸型の段差に対応する他方面における位置に凹型の段差を含む請求項1に記載の半導体装置。 - 前記導体は、
前記導体の前記接触面に設けられた貫通孔を含む請求項1または請求項2に記載の半導体装置。 - 前記導体の前記接触面は、
前記貫通孔の外周に連続的に沿って、前記配線板の前記第2面に密着する請求項3に記載の半導体装置。 - 前記配線板の前記第1面と前記半導体素子の前記第1電極とは、または、前記金属板と前記半導体素子の前記第2電極とは、Ag、CuまたはSnを含みかつ導電性を有する接合材を介して接続される請求項1から請求項4のいずれか一項に記載の半導体装置。
- 前記半導体素子の前記第1電極と、前記導体を固定する前記配線板との間に、金属からなる少なくとも1つの接続板をさらに備える請求項1から請求項4のいずれか一項に記載の半導体装置。
- 前記接続板と前記半導体素子の前記第1電極とは、または、前記接続板と前記配線板とは、Ag、CuまたはSnを含みかつ導電性を有する接合材を介して接続される請求項6に記載の半導体装置。
- 板状の形状を有し、一端が外部に接続可能に配置され、かつ、他端の一方面側が前記金属板の一面に固定されて、前記半導体素子の前記第2電極に配線される、前記導体とは異なる別の導体をさらに備え、
前記別の導体は、前記他端の一方面に少なくとも1つの凸型の段差を含み、
前記別の導体が含む前記少なくとも1つの凸型の段差の頂部は、前記金属板の前記一面に対して平行な接触面を含み、
前記別の導体の前記他端は、前記別の導体の前記接触面と前記金属板の前記一面とが密着することにより前記金属板の前記一面に固定される請求項1から請求項7のいずれか一項に記載の半導体装置。 - 前記別の導体は、
前記別の導体の前記一方面の前記少なくとも1つの凸型の段差に対応する他方面における位置に凹型の段差を含む請求項8に記載の半導体装置。 - 前記別の導体は、
前記別の導体の前記接触面に設けられた貫通孔を含む請求項8または請求項9に記載の半導体装置。 - 前記別の導体の前記接触面は、
前記別の導体の前記接触面に設けられた前記貫通孔の外周に連続的に沿って、前記金属板の前記一面に密着する請求項10に記載の半導体装置。 - 金属板と、表面に設けられる第1電極と裏面に設けられる第2電極とを含み前記第2電極が前記金属板に接続されて前記金属板上に保持される半導体素子と、互いに対面する第1面および第2面を含む配線板と、板状の形状を有する導体と、を準備し、
前記配線板の前記第1面を前記半導体素子の前記第1電極に対面して接続し、
前記導体の一端を外部に接続可能に配置し、かつ、前記導体の他端の一方面側を前記配線板の前記第2面に固定して、前記半導体素子の前記第1電極に前記導体を配線し、
前記導体は、前記他端の前記一方面に少なくとも1つの凸型の段差を含み、
前記導体が含む前記少なくとも1つの凸型の段差の頂部は、接触面を含み、
前記導体の前記他端の前記一方面側を前記配線板の前記第2面に固定する際、
前記接触面が前記配線板の前記第2面に対して平行に接触するよう前記導体を載置し、
前記導体の前記接触面と前記配線板の前記第2面とをレーザ接合して密着させ、前記導体の前記他端を前記配線板の前記第2面に固定する半導体装置の製造方法。 - 前記導体は、
前記一方面の前記少なくとも1つの凸型の段差に対応する他方面における位置に凹型の段差を含む請求項12に記載の半導体装置の製造方法。 - 前記導体は、
前記導体の前記接触面に設けられた貫通孔を含む請求項12または請求項13に記載の半導体装置の製造方法。 - 前記貫通孔の外周に連続的に沿って、前記配線板の前記第2面に前記導体の前記接触面をレーザ接合して密着させる請求項14に記載の半導体装置の製造方法。
- 前記導体の前記接触面と前記配線板の前記第2面とをレーザ接合する際、
ファイバーレーザから発振される波長500nmから1200nmのレーザによってレーザ接合する請求項12から請求項15のいずれか一項に記載の半導体装置の製造方法。 - 前記配線板の前記第1面と前記半導体素子の前記第1電極とを、または、前記金属板と前記半導体素子の前記第2電極とを、接合材を介して接続し、
前記接合材は、AgもしくはCuを含む焼結材が焼結して形成され、または、Snを含むインサート材が液相拡散接合して形成される請求項12から請求項16のいずれか一項に記載の半導体装置の製造方法。 - 前記半導体素子の前記第1電極と、前記導体を固定する前記配線板との間に、金属からなる少なくとも1つの接続板をさらに接続する請求項12から請求項16のいずれか一項に記載の半導体装置の製造方法。
- 前記接続板と前記半導体素子の前記第1電極とを、または、前記接続板と前記配線板とを、接合材を介して接続し、
前記接合材は、AgもしくはCuを含む焼結材が焼結して形成され、または、Snを含むインサート材が液相拡散接合して形成される請求項18に記載の半導体装置の製造方法。 - 板状の形状を有し、前記導体とは異なる別の導体をさらに準備し、
前記別の導体の一端を外部に接続可能に配置し、かつ、前記別の導体の他端の一方面側を前記金属板の一面に固定して、前記半導体素子の前記第2電極に前記別の導体を配線し
前記別の導体は、前記別の導体の前記他端の前記一方面に、少なくとも1つの凸型の段差を含み、
前記別の導体が含む前記少なくとも1つの凸型の段差の頂部は、前記金属板の前記一面に接触する接触面を含み、
前記別の導体の前記他端の前記一方面側を前記金属板の前記一面に固定する際、
前記別の導体の前記接触面が前記金属板の前記一面に対して平行に接触するよう前記別の導体を載置し、
前記別の導体の前記接触面と前記金属板の前記一面とをレーザ接合して密着させ、前記別の導体の前記他端を前記金属板の前記一面に固定する請求項12から請求項19のいずれか一項に記載の半導体装置の製造方法。 - 前記別の導体は、
前記別の導体の前記一方面の前記少なくとも1つの凸型の段差に対応する他方面における位置に凹型の段差を含む請求項20に記載の半導体装置の製造方法。 - 前記別の導体は、
前記別の導体の前記接触面に設けられた貫通孔を含む請求項20または請求項21に記載の半導体装置の製造方法。 - 前記別の導体の前記接触面に設けられた前記貫通孔の外周に連続的に沿って、前記金属板の前記一面に前記別の導体の前記接触面をレーザ接合して密着させる請求項22に記載の半導体装置の製造方法。
- 前記別の導体の前記接触面と前記金属板の前記一面とをレーザ接合する際、
ファイバーレーザから発振される波長500nmから1200nmのレーザによってレーザ接合する請求項20から請求項23のいずれか一項に記載の半導体装置の製造方法。
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JP2021019038A (ja) * | 2019-07-18 | 2021-02-15 | 昭和電工マテリアルズ株式会社 | 半導体装置 |
JP7484097B2 (ja) | 2019-07-18 | 2024-05-16 | 株式会社レゾナック | 半導体装置 |
JP2022053224A (ja) * | 2020-09-24 | 2022-04-05 | 株式会社東芝 | 半導体装置 |
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US11923270B2 (en) | 2020-09-24 | 2024-03-05 | Kabushiki Kaisha Toshiba | Semiconductor device |
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US20190122998A1 (en) | 2019-04-25 |
CN109698179A (zh) | 2019-04-30 |
JP6945418B2 (ja) | 2021-10-06 |
CN109698179B (zh) | 2023-03-24 |
DE102018217231B4 (de) | 2024-01-25 |
DE102018217231A1 (de) | 2019-04-25 |
US10615131B2 (en) | 2020-04-07 |
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