JP6020731B2 - 半導体モジュール、半導体装置、及び自動車 - Google Patents
半導体モジュール、半導体装置、及び自動車 Download PDFInfo
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- JP6020731B2 JP6020731B2 JP2015533865A JP2015533865A JP6020731B2 JP 6020731 B2 JP6020731 B2 JP 6020731B2 JP 2015533865 A JP2015533865 A JP 2015533865A JP 2015533865 A JP2015533865 A JP 2015533865A JP 6020731 B2 JP6020731 B2 JP 6020731B2
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- semiconductor module
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Description
図1は、本発明の実施の形態1に係る半導体モジュールを示す断面図である。ベース板1は、固定面(上面)と、固定面と反対の面である放熱面(下面)とを有する。ベース板1は、放熱面に少なくとも1つ以上の突起構造2を持つ。この突起構造2は放熱フィンであり、流水によるベース板1の放熱面の冷却効率を高める。ベース板1と突起構造2の材質は同じでも異なっていてもよい。例えば、放熱性を上げるため、突起構造2の材質としてベース板1よりも熱伝導率が高いものを使用してもよい。
図12は、本発明の実施の形態2に係る半導体モジュールを示す断面図である。本実施の形態では、配線部材としてCuフレーム40,41を用いている。半導体チップ7,8の上面はそれぞれ半田6を介してCuフレーム40に接続される。半導体チップ9,10の上面はそれぞれ半田6を介してCuフレーム41に接続される。Cuフレーム40,41はケース14の外部へ取り出され電極として働く。また、半導体チップ7,8はCuフレーム40を介して導電パターン5に接続される。
図14は、本発明の実施の形態3に係る半導体モジュールを示す断面図である。本実施の形態では、絶縁基板3、Cuフレーム40,41、及び導電パターン4,5の少なくとも一部をポリイミド膜42が覆っている。このポリイミド膜42により、絶縁基板3、配線部材、及び導電パターン4,5と樹脂16との密着性が向上するため、半導体モジュール27のHC,PC寿命が向上する。
図15は、本発明の実施の形態4に係る半導体モジュールを示す断面図である。本実施の形態では樹脂16の代わりに、半導体チップ7〜10及び配線部材の周辺を封止する第1の樹脂43と、第1の樹脂43の外側を封止する第2の樹脂44とを用いている。
図16は、本発明の実施の形態5に係る半導体モジュールを示す断面図である。本実施の形態では樹脂16はモールド樹脂であり、ケース14等が存在しない。その他の構成は実施の形態2と同様である。このようにモールド樹脂を用いた場合でも同様の効果を得ることができる。なお、実施の形態1と同様に配線部材としてAlワイヤを用いてもよく、実施の形態3,4の構成を組み合わせてもよい。
Claims (17)
- 固定面と、前記固定面と反対の面である放熱面とを有するベース板と、
前記ベース板の前記固定面に接合された絶縁基板と、
前記絶縁基板上に設けられた第1及び第2の導電パターンと、
前記第1の導電パターン上に設けられた半導体チップと、
前記半導体チップと前記第2の導電パターンを接続する配線部材と、
前記ベース板の前記固定面、前記絶縁基板、前記第1及び第2の導電パターン、前記半導体チップ、及び前記配線部材を封止する樹脂とを備え、
前記ベース板は、金属部と、前記金属部内に設けられ前記金属部より高いヤング率を持つ強化材とを有し、
前記強化材の材質は前記絶縁基板の材質と同じであることを特徴とする半導体モジュール。 - 前記樹脂の線膨張係数は、前記金属部の線膨張係数と前記強化材の線膨張係数の間の数値であることを特徴とする請求項1に記載の半導体モジュール。
- 前記樹脂の線膨張係数は8〜16ppm/℃であり、
前記ベース板の線膨張係数は10〜20ppm/℃であることを特徴とする請求項2に記載の半導体モジュール。 - 前記強化材の厚みは前記絶縁基板の厚みと同じであることを特徴とする請求項1に記載の半導体モジュール。
- 前記配線部材は金属ワイヤであることを特徴とする請求項1〜4の何れか1項に記載の半導体モジュール。
- 前記配線部材は金属フレームであることを特徴とする請求項1〜4の何れか1項に記載の半導体モジュール。
- 前記絶縁基板、前記配線部材、及び前記第1及び第2の導電パターンの少なくとも一部を覆って前記樹脂との密着性を向上させる被膜を更に備えることを特徴とする請求項6に記載の半導体モジュール。
- 前記樹脂は、前記半導体チップ及び前記配線部材の周辺を封止する第1の樹脂と、前記第1の樹脂の外側を封止する第2の樹脂とを有し、
前記第1の樹脂は前記第2の樹脂よりも高いヤング率を持つことを特徴とする請求項1〜7の何れか1項に記載の半導体モジュール。 - 前記ベース板の前記固定面に接着され、前記絶縁基板、前記第1及び第2の導電パターン、前記半導体チップ、及び前記配線部材を囲むケースを更に備え、
前記樹脂は、前記ケースを鋳型として用いてポッティングされたものであることを特徴とする請求項1〜8の何れか1項に記載の半導体モジュール。 - 前記樹脂はモールド樹脂であることを特徴とする請求項1〜8の何れか1項に記載の半導体モジュール。
- 前記ベース板は、前記放熱面に少なくとも1つ以上の突起構造を持つことを特徴とする請求項1〜10の何れか1項に記載の半導体モジュール。
- 前記ベース板と前記絶縁基板は溶湯接合されていることを特徴とする請求項1〜11の何れか1項に記載の半導体モジュール。
- 前記ベース板と前記絶縁基板は接合材により接合されていることを特徴とする請求項1〜11の何れか1項に記載の半導体モジュール。
- 前記半導体チップは前記第1の導電パターン上に超音波接合されていることを特徴とする請求項1〜13の何れか1項に記載の半導体モジュール。
- 前記強化材に少なくともひとつの開口が設けられていることを特徴とする請求項1〜14の何れか1項に記載の半導体モジュール。
- 請求項1〜15の何れか1項に記載の半導体モジュールと、
前記半導体モジュールの前記ベース板の前記放熱面側に取り付けられ、前記半導体モジュールを冷却するための冷却ジャケットとを備えることを特徴とする半導体装置。 - 請求項1〜15の何れか1項に記載の半導体モジュールと、
バッテリと、
モータとを備え、
前記半導体モジュールが前記バッテリの直流電流を交流電流に変換して前記モータに供給することを特徴とする自動車。
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