JP7070373B2 - 半導体装置の製造方法、半導体装置、電力変換装置 - Google Patents
半導体装置の製造方法、半導体装置、電力変換装置 Download PDFInfo
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- JP7070373B2 JP7070373B2 JP2018222284A JP2018222284A JP7070373B2 JP 7070373 B2 JP7070373 B2 JP 7070373B2 JP 2018222284 A JP2018222284 A JP 2018222284A JP 2018222284 A JP2018222284 A JP 2018222284A JP 7070373 B2 JP7070373 B2 JP 7070373B2
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Description
本願の開示に係る半導体装置は、ケースと、金属パターンを有し、該ケースに固定された絶縁基板と、該ケースの中に設けられ、該金属パターンに固定された半導体チップと、該半導体チップを覆う樹脂層と、該ケースの中の該半導体チップの上方に、該絶縁基板と対向して設けられた格子と、該ケースの内の該格子の上方に設けられた上部格子と、を備えたことを特徴とする。
図1-3を参照して実施の形態1に係る半導体装置の製造方法を説明する。図1は、製造途中の半導体装置の断面斜視図である。まず、絶縁基板12の金属パターン12cに、半導体チップ16を固定する。例えば、金属パターン12cの上に、Ag若しくはCuなどの焼結材、又ははんだを材料とする接合材14を設け、その接合材14で半導体チップ16を金属パターン12cに固定する。絶縁基板12は例えば、金属ベース板12a、金属ベース板12aの上に形成された絶縁層12b、及び絶縁層12bの上に形成された金属パターン12cを備える。
図4-6は、実施の形態2に係る半導体装置の製造方法を示す図である。実施の形態2に係る半導体装置には上部格子50が提供される。上部格子50は、ケース30の中の格子32の上に設けられる。上部格子50のケース30の内壁への固定は、接着剤又は嵌合によってなし得る。一例によれば、上部格子50によって提供される開口は、格子32によって提供される開口より大きい。格子32は比較的小さい封止樹脂を支持し得るのに対し、上部格子50の開口は大きいので小さい封止樹脂を支持することはできず比較的大きい封止樹脂を保持し得る。
実施の形態3に係る半導体装置の製造方法と半導体装置では、ケースと格子を別部品とした。図7は、実施の形態3に係る格子32の構成例を示す平面図である。格子32には、例えば、端子を通すために複数の断線部32a、32b、32c、32dが設けられる。断線部の大きさと位置は、製品の仕様に応じて決められる。このような格子32は、複数の樹脂をケースの中に提供する前に、ケース30に組み込むことができる。例えば、ケース30に絶縁基板12を固定した後に、ケース30に格子32を組み込み、樹脂を投入し得る。ケースと格子を別部品とすることは、樹脂の物性、パワーモジュール内部の形状、又は端子の配置に応じた最適な格子の提供を可能とする。
図8は、実施の形態4に係る半導体装置で用いる格子32の構成例を示す平面図である。この格子32は、絶縁体部分32Aと金属部分32Bを有する。金属部分32Bは、パワーモジュールの電気的配線を行うための配線パターンとして利用し得る。
本実施の形態は、上述した実施の形態1から4にかかる半導体装置を電力変換装置に適用したものである。この電力変換装置は特定の電力変換装置に限定されるものではないが、以下、実施の形態5として、三相のインバータに、上述した実施の形態1から4にかかる半導体装置を適用した場合について説明する。
Claims (17)
- ケースの中に、金属パターンを有する絶縁基板、半導体チップ、前記半導体チップに塗布された焼結材、及び端子を提供することと、
前記ケースの中に設けられた格子によって支持される顆粒状の複数の封止樹脂を提供することと、
前記ケースの内部を室温より高い第1温度まで加熱することで、気化した前記焼結材の溶剤が前記格子の隙間と前記複数の封止樹脂の隙間から前記ケースの外に排気されることと、
前記ケースの内部を前記第1温度より高い第2温度まで加熱することで、溶けた前記複数の封止樹脂が前記格子の隙間をとおって前記半導体チップを覆う樹脂層となることと、を備えたことを特徴とする半導体装置の製造方法。 - 前記ケースの中を前記第2温度まで加熱する際には、前記ケースの周りの雰囲気を大気圧より低い圧力とすることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記焼結材は、前記半導体チップと前記端子を接合することを特徴とする請求項1又は2に記載の半導体装置の製造方法。
- 前記ケースの内部を前記第1温度まで加熱した後に、前記ケースの内部を冷却することなく、前記ケースの内部を前記第2温度まで加熱することを特徴とする請求項1から3のいずれか1項に記載の半導体装置の製造方法。
- 前記格子によって支持される前記複数の封止樹脂を提供した後に、前記ケースの中の前記格子の上に設けられた上部格子によって支持される、前記複数の封止樹脂より融点が高い顆粒状の複数の補助封止樹脂を提供することと、
前記ケースの内部を前記第2温度まで加熱した後に、前記ケースの内部を前記第2温度より高い第3温度まで加熱することで、溶けた前記複数の補助封止樹脂が前記上部格子の隙間をとおって前記樹脂層の上の補助樹脂層となること、とを備えたことを特徴とする請求項1から4のいずれか1項に記載の半導体装置の製造方法。 - 前記ケースの温度を前記第3温度まで加熱する際には、前記ケースの周りの雰囲気を大気圧より低い圧力とすることを特徴とする請求項5に記載の半導体装置の製造方法。
- 前記ケースの内部を前記第2温度まで加熱した後に、前記ケースの内部を冷却することなく、前記ケースの内部を前記第3温度まで加熱することを特徴とする請求項5又は6に記載の半導体装置の製造方法。
- 前記上部格子の隙間は、前記格子の隙間より大きく、
前記複数の補助封止樹脂は、前記複数の封止樹脂より大きいことを特徴とする請求項5から7のいずれか1項に記載の半導体装置の製造方法。 - 前記複数の封止樹脂を提供する前に、前記格子を前記ケースに組み込むことを特徴とする請求項1から8のいずれか1項に記載の半導体装置の製造方法。
- 前記格子は金属部分を有することを特徴とする請求項9に記載の半導体装置の製造方法。
- 前記金属部分は前記端子に直接又は導電材を介して接したことを特徴とする請求項10に記載の半導体装置の製造方法。
- ケースと、
金属パターンを有し、前記ケースに固定された絶縁基板と、
前記ケースの中に設けられ、前記金属パターンに固定された半導体チップと、
前記半導体チップを覆う樹脂層と、
前記ケースの中の前記半導体チップの上方に、前記絶縁基板と対向して設けられた格子と、
前記ケースの内の前記格子の上方に設けられた上部格子と、
を備えたことを特徴とする半導体装置。 - 前記格子は、前記ケースに接着剤で固定されたことを特徴とする請求項12に記載の半導体装置。
- 前記格子は、前記ケースに嵌合されたことを特徴とする請求項12に記載の半導体装置。
- 前記格子は金属部分を有することを特徴とする請求項12から14のいずれか1項に記載の半導体装置。
- 前記金属部分と直接又は導電材を介して接した端子を備えたことを特徴とする請求項15に記載の半導体装置。
- 請求項12から16のいずれか1項に記載の半導体装置を有し、入力される電力を変換して出力する主変換回路と、
前記主変換回路を制御する制御信号を前記主変換回路に出力する制御回路と、を備えたことを特徴とする電力変換装置。
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US11195770B2 (en) | 2021-12-07 |
US20210391231A1 (en) | 2021-12-16 |
CN111243969B (zh) | 2024-02-06 |
US11664288B2 (en) | 2023-05-30 |
JP2020088227A (ja) | 2020-06-04 |
DE102019217774A1 (de) | 2020-05-28 |
US20200168519A1 (en) | 2020-05-28 |
CN111243969A (zh) | 2020-06-05 |
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