JP7159395B2 - 回路基板および半導体モジュール - Google Patents
回路基板および半導体モジュール Download PDFInfo
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- JP7159395B2 JP7159395B2 JP2021093522A JP2021093522A JP7159395B2 JP 7159395 B2 JP7159395 B2 JP 7159395B2 JP 2021093522 A JP2021093522 A JP 2021093522A JP 2021093522 A JP2021093522 A JP 2021093522A JP 7159395 B2 JP7159395 B2 JP 7159395B2
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Description
窒化珪素基板として表1に示す2種類の基板を用意した。
Claims (8)
- 第1の面と第2の面とを有する、厚さ0.33mm以下で且つ3点曲げ強度500MPa以上の窒化珪素基板と、
前記第1の面に接合された第1の銅板と、前記第1の銅板の表面から突出する凸部と、を有する第1の金属部と、
前記第2の面に接合された第2の銅板を有する第2の金属部と、を具備する回路基板であって、
前記凸部は、前記第1の銅板の一部、リードフレームの一部、またはリードピンの一部であり、
前記第1の銅板の合計体積に対する前記第2の銅板の合計体積の比が1.0よりも大きく、
前記窒化珪素基板が長辺方向に沿って第1の分割部、第2の分割部、および第3の分割部に等分割されるとき、
前記第1の金属部は、前記第1の分割部に重畳する第1の領域と、前記第2の分割部に重畳する第2の領域と、前記第3の分割部に重畳する第3の領域と、を有し、
前記第2の金属部は、前記第1の分割部に重畳する第4の領域と、前記第2の分割部に重畳する第5の領域と、前記第3の分割部に重畳する第6の領域と、を有し、
前記第1の領域の体積V1、前記第2の領域の体積V2、前記第3の領域の体積V3、前記第4の領域の体積V4、前記第5の領域の体積V5、および前記第6の領域の体積V6は、
(V4/V1)+(V6/V3)≦2(V5/V2)と、
0.5≦V4/V1≦2と、
0.5≦V5/V2≦2と、
0.5≦V6/V3≦2と、を満足する数であり、
前記凸部が前記第1の領域および前記第3の領域の少なくとも一つからはみ出すはみ出し部を含むとき、前記はみ出し部の体積は、前記体積V1および前記体積V3に含まれず、
前記窒化珪素基板の前記長辺方向の反り量および短辺方向の反り量のそれぞれは、0.1mm未満である、回路基板。
- 前記はみ出し部は、前記リードフレームの一部である、請求項1に記載の回路基板。
- 前記窒化珪素基板の前記長辺方向の長さおよび前記短辺方向の長さのそれぞれは、10mm以上200mm以下である、請求項1または請求項2に記載の回路基板。
- 前記第1の銅板および前記第2の銅板の少なくとも一つの側面は傾斜している、請求項1ないし請求項3のいずれか一項に記載の回路基板。
- 前記第1の銅板および前記第2の銅板の少なくとも一つは、接合層を介して接合され、
前記接合層は、Agと、Cuと、Ti、Zr、およびHfから選ばれる少なくとも一つの元素と、を含む、請求項1ないし請求項4のいずれか一項に記載の回路基板。 - 請求項1ないし請求項5のいずれか一項に記載の回路基板と、
前記第1の金属部に搭載された半導体素子と、を具備する、半導体モジュール。 - 前記回路基板を実装するための放熱部材をさらに具備する、請求項6に記載の半導体モジュール。
- 前記回路基板は、ねじにより前記放熱部材に固定されている、請求項7に記載の半導体モジュール。
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