JP4100685B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP4100685B2 JP4100685B2 JP2003296727A JP2003296727A JP4100685B2 JP 4100685 B2 JP4100685 B2 JP 4100685B2 JP 2003296727 A JP2003296727 A JP 2003296727A JP 2003296727 A JP2003296727 A JP 2003296727A JP 4100685 B2 JP4100685 B2 JP 4100685B2
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Description
ところで、ボンディングワイヤをリードフレームに代えて絶縁基板(セラミック板の表裏両面に銅回路パターンを直接接合したDirect Bonding Copper 基板)の銅回路パターン,あるいは該絶縁基板にマウントした半導体チップに半田接合する場合に、その半田層の厚みにバラツキがあると次記のような不具合が生じる。すなわち、半田層が所定の厚みより厚いと半田付けの際に溶融半田が接合面域から周囲に流れ出して他の回路パターンと電気的に短絡することがある。また、逆に半田層の厚みが薄いと、使用環境でのヒートサイクルにより、絶縁基板とリードフレームとの熱膨張差に起因して半田接合部に発生した熱応力で早期に疲労破壊に至るといった問題がある。
ところで、前記した半導体装置における接合半田層の厚さが例えば100μm以上であれば、その半田接合面に形成する突起の高さも100μm以上となるので、機械的な切削加工,切り起こし加工により突起を形成することも可能であるが、半田層の厚さがそれ以下にある半導体装置に適用する場合には突起の高さが短小で、かつ要求される加工精度も高くなることから、機械加工法での突起の形成が困難となる。
本発明は上記の点に鑑みなされたものであり、先記のようにリードフレームまたは絶縁基板の銅回路パターンの半田接合面に突起を形成して半田層の厚みのバラツキを防ぐようにした接続構造において、前記突起を簡易な製法で形成できるように改良した半導体装置の接続構造を提供することを目的とする。
前記リードフレーム, 銅回路パターンのいずれか一方の半田接合面に半田層の厚さに相応した凸状の突起を形成するものとし、この突起を次に記す手法により形成する。
(1) 半田接合面に導電性接着剤を塗布して突起を形成する(請求項1)。
ここで、前記の凸状突起7は、できるだけコストをかけずに簡易な方法で形成するために、次記のような手法で形成するものとする。
(2) リードフレーム3の電極面にレジストを塗布し、エッチング液に浸して所望高さの突起7を形成する。
(3) 突起の材料に導電性接着剤を用い、ディスペンサを使ってリードフレーム3の電極面上に所定箇所に所望の高さとなるように導電性接着剤を点状に塗布した上で、これを硬化させて突起7を形成する。
(4) 前記導電性接着剤の代わりに、ウレタン系,アクリル系,エポキシ系,ポリイミド系などの耐熱性樹脂を用い、これをリードフレーム3の電極面に点状に塗布した上で、硬化処理して所望高さの突起7を形成する。なお、この場合に樹脂材に光硬化形樹脂を用いることにより、加熱処理を行わずに紫外線照射で硬化させることができる。
2 銅回路パターン
3 リードフレーム
4 半導体チップ
5 半田層
7,8 突起
Claims (1)
- 絶縁基板の銅回路パターンもしくは銅回路パターン上にマウントした半導体チップにリードフレームを半田接合した接続構造を有する半導体装置において、
前記リードフレーム, 銅回路パターンのいずれか一方の半田接合面に半田層の厚さに相応した凸状の突起を形成するものとし、かつ該突起を半田接合面に塗布形成した導電性接着剤で形成したことを特徴とする半導体装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003296727A JP4100685B2 (ja) | 2003-08-20 | 2003-08-20 | 半導体装置 |
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Application Number | Priority Date | Filing Date | Title |
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JP2003296727A JP4100685B2 (ja) | 2003-08-20 | 2003-08-20 | 半導体装置 |
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JP2005072098A JP2005072098A (ja) | 2005-03-17 |
JP4100685B2 true JP4100685B2 (ja) | 2008-06-11 |
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JP2003296727A Expired - Fee Related JP4100685B2 (ja) | 2003-08-20 | 2003-08-20 | 半導体装置 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012157584A1 (ja) | 2011-05-13 | 2012-11-22 | 富士電機株式会社 | 半導体装置とその製造方法 |
WO2012157583A1 (ja) | 2011-05-13 | 2012-11-22 | 富士電機株式会社 | 半導体装置とその製造方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007251076A (ja) * | 2006-03-20 | 2007-09-27 | Hitachi Ltd | パワー半導体モジュール |
CN103314437B (zh) * | 2011-03-24 | 2016-03-30 | 三菱电机株式会社 | 功率半导体模块及电源单元装置 |
JP6289583B1 (ja) * | 2016-10-24 | 2018-03-07 | 三菱電機株式会社 | 電力半導体装置 |
-
2003
- 2003-08-20 JP JP2003296727A patent/JP4100685B2/ja not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012157584A1 (ja) | 2011-05-13 | 2012-11-22 | 富士電機株式会社 | 半導体装置とその製造方法 |
WO2012157583A1 (ja) | 2011-05-13 | 2012-11-22 | 富士電機株式会社 | 半導体装置とその製造方法 |
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