JP7325536B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP7325536B2 JP7325536B2 JP2021563873A JP2021563873A JP7325536B2 JP 7325536 B2 JP7325536 B2 JP 7325536B2 JP 2021563873 A JP2021563873 A JP 2021563873A JP 2021563873 A JP2021563873 A JP 2021563873A JP 7325536 B2 JP7325536 B2 JP 7325536B2
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Description
実施の形態1に係る半導体装置の一例について説明する。図1および図2に示すように、半導体装置1では、絶縁基板としてのセラミック基板5に、半導体素子19として、パワー半導体素子21とIC素子24とが搭載されている。パワー半導体素子21は、たとえば、電力を制御するIGBT(Insulated Gate Bipolar Transistor)とダイオードとを含む。IC素子24は、たとえば、スイッチング素子を含む。
実施の形態2に係る半導体装置の一例について説明する。ここでは、主に、半導体装置の製造方法について説明する。なお、前述した半導体装置1の構成と同様の構成については同一符号を付し、必要である場合を除きその説明を繰り返さないこととする。
ここでは、冷却機構を含む半導体装置のバリエーションについて説明する。なお、図1および図2に示す半導体装置1の構成と同様の構成については同一符号を付し、必要である場合を除きその説明を繰り返さないこととする。
図16に示すように、第1例に係る半導体装置1は、冷却機構として水冷フィン41を備えている。水冷フィン41には、冷却水42が流れる複数の流路41aが設けられている。水冷フィン41の上に絶縁層3を介在させて、半導体素子19を搭載したセラミック基板5が配置されている。そのセラミック基板5を取り囲むように、ケース13が水冷フィン41に固定されている。
第1例では、冷却機構としての水冷フィン41の一部と封止材37との間に、プライマ層35が介在する半導体装置1について説明したが、図17に示すように、冷却フィン43(空冷フィン)そのものにプライマ層が形成されていない態様の半導体装置1でもよい。第2例に係る半導体装置1は、図1および図2に示す半導体装置1と実質的に同様の構成を有しており、特に、冷却機構39として、たとえば、冷却フィン43を適用した態様の半導体装置1である。
各実施の形態では、半導体素子19等がワイヤ25、27、29によって電気的に接続されている場合について説明した。第3例では、半導体素子等が、導電性部材としてのリードフレームによって電気的に接続されている半導体装置について説明する。
実施の形態4に係る半導体装置の一例について説明する。ここでは、半導体装置の構造とその製造方法とについて説明する。なお、図1および図2に示す半導体装置1の構成と同様の構成については同一符号を付し、必要である場合を除きその説明を繰り返さないこととする。
ここでは、上述した実施の形態1~4において説明した半導体装置を適用した電力変換装置について説明する。本開示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4として、三相のインバータに本開示を適用した場合について説明する。
Claims (11)
- 半導体素子を封止材によって封止した半導体装置の製造方法であって、
前記封止材によって封止される、前記半導体素子を含む被封止部材を形成する工程と、
前記被封止部材をケース内に収容する工程と、
シランカップリング剤の溶液を前記ケース内に流し込む工程と、
前記ケース内の前記溶液を除去する工程と、
前記溶液を前記ケース内に流し込む工程において前記被封止部材に付着した前記溶液に処理を施すことによって、前記被封止部材の表面にプライマ層を形成する工程と、
前記ケース内に封止材を充填することによって、前記プライマ層が形成された前記被封止部材を封止する工程と、
を備え、
前記プライマ層を形成する工程は、前記半導体素子の表面に前記プライマ層を形成する工程を含む、半導体装置の製造方法。 - 前記シランカップリング剤の前記溶液の溶媒として、水およびエタノールのいずれかを用いる、請求項1記載の半導体装置の製造方法。
- 前記溶液における前記シランカップリング剤の濃度は、1~10%である、請求項1または2に記載の半導体装置の製造方法。
- 前記被封止部材を形成する工程は、前記半導体素子を絶縁基板に搭載する工程を含み、
前記プライマ層を形成する工程は、前記半導体素子を搭載した前記絶縁基板の表面に前記プライマ層を形成する工程を含む、請求項1~3のいずれか1項に記載の半導体装置の製造方法。 - 前記被封止部材を形成する工程は、前記半導体素子と外部とを電気的に接続する導電性部材を形成する工程を含み、
前記プライマ層を形成する工程は、前記導電性部材の表面に前記プライマ層を形成する工程を含む、請求項1~4のいずれか1項に記載の半導体装置の製造方法。 - 前記溶液を除去する工程は、ノズルにより前記溶液を吸引する工程を含む、請求項1~5のいずれか1項に記載の半導体装置の製造方法。
- 前記溶液を除去する工程は、前記ケースを傾けることによって、前記ケース内の前記溶液を一箇所に集めながら前記ノズルにより吸引する工程を含む、請求項6記載の半導体装置の製造方法。
- 前記溶液を除去する工程は、前記ノズルを移動させながら前記溶液を吸引する工程を含む、請求項6または7に記載の半導体装置の製造方法。
- 前記溶液を除去する工程は、前記ケース内の底面に傾斜を設けることによって、前記ケース内における、前記底面の位置が最も低い箇所に、最終的に残ることになる前記溶液を前記ノズルにより吸引する工程を含む、請求項6記載の半導体装置の製造方法。
- 前記溶液を除去する工程と前記プライマ層を形成する工程との間に、
前記被封止部材以外の、前記ケースの外壁面を含む部分を、カバー部材によって覆う工程と、
前記カバー部材が配置された状態で、前記ケース内に残る前記溶液を空気により吹き飛ばす工程と
を含む、請求項1~9のいずれか1項に記載の半導体装置の製造方法。 - 前記溶液を除去する工程と前記プライマ層を形成する工程との間に、
前記ケースに振動および回転の少なくともいずれかを与える工程を含む、請求項1~10のいずれか1項に記載の半導体装置の製造方法。
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