JP7479307B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7479307B2 JP7479307B2 JP2021004053A JP2021004053A JP7479307B2 JP 7479307 B2 JP7479307 B2 JP 7479307B2 JP 2021004053 A JP2021004053 A JP 2021004053A JP 2021004053 A JP2021004053 A JP 2021004053A JP 7479307 B2 JP7479307 B2 JP 7479307B2
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Description
図1は、実施の形態1に係る半導体装置100の断面模式図である。図1のように、半導体装置100は、パワー半導体素子である半導体素子1が、ケース2に収容され、封止材3で封止された構造を有するパワー半導体装置である。半導体素子1は、ケイ素(Si)や炭化ケイ素(SiC)、窒化ガリウム(GaN)などを用いて形成されたIGBT(Insulated Gate Bipolar Transistor)やMOSFET(Metal Oxide Semiconductor Field Effect Transistor)などである。
図7は、実施の形態2に係る半導体装置の断面模式図である。また、図8は、実施の形態2における低透湿シート11の上面図および断面図である。実施の形態2では、低透湿シート11は、その周縁部、すなわちケース2と蓋12とに挟持される部分に凸部11aを有しており、ケース2には、低透湿シート11の凸部11aが挿入される溝2bが設けられている。
図9は、実施の形態3に係る半導体装置100の断面模式図である。図9のように、実施の形態3の半導体装置100では、ケース2とベース板6との接着界面に低透湿シート14(第2の低透湿シート)が設けられている。低透湿シート14の形状は、図10のように平面視でフレーム状であり、封止材3を取り囲むようにケース2とベース板6との接着界面に延在する。低透湿シート14を構成する低透湿性材料は、封止材3を覆う低透湿シート11と同様でよく、その透湿度は1g/m2×24Hr以下が望ましい。
図15は、実施の形態4に係る半導体装置100の断面模式図である。実施の形態4に係る半導体装置100の構成は、実施の形態3(図9)の構成に対し、ケース2とベース板6との接着界面に設けられた低透湿シート14の厚さを、接着剤8の厚さと同じにしたものである。低透湿シート14の厚さと接着剤8の厚さとが同じであるため、実施の形態2でケース2に設けた溝2cおよびベース板6に設けた溝6aは不要になり、生産性の向上および加工コストの低減に寄与できる。
Claims (10)
- 半導体素子と、
前記半導体素子を収容したケースと、
前記半導体素子が収容された前記ケース内に充填された封止材と、
前記封止材を覆い、透湿度が1g/m2×24Hr以下の低透湿性材料からなる第1の低透湿シートと、
前記第1の低透湿シートの上を覆うとともに、前記ケースの開口部を塞ぐ蓋と、
を備え、
前記第1の低透湿シートの周縁部が、前記ケースと前記蓋とに挟持されている、
半導体装置。 - 半導体素子と、
前記半導体素子を収容したケースと、
前記半導体素子が収容された前記ケース内に充填された封止材と、
前記封止材を覆い、透湿度が1g/m 2 ×24Hr以下の低透湿性材料からなる第1の低透湿シートと、
前記ケースの開口部を塞ぐ蓋と、
を備え、
前記第1の低透湿シートの周縁部が、前記ケースと前記蓋とに挟持されており、
前記ケースは、前記開口部の周縁に座ぐり部を有し、
前記蓋は、前記ケースの前記開口部に嵌合された凸部を有し、
前記第1の低透湿シートは、前記ケースの前記座ぐり部と前記蓋の前記凸部とに挟持されている、
半導体装置。 - 半導体素子と、
前記半導体素子を収容したケースと、
前記半導体素子が収容された前記ケース内に充填された封止材と、
前記封止材を覆い、透湿度が1g/m 2 ×24Hr以下の低透湿性材料からなる第1の低透湿シートと、
前記ケースの開口部を塞ぐ蓋と、
を備え、
前記第1の低透湿シートの周縁部が、前記ケースと前記蓋とに挟持されており、
前記ケースと前記蓋とは、前記第1の低透湿シートを挟持しない部分で、第1の接着剤を用いて接着されており、
前記第1の接着剤の厚さ方向は、前記ケースと前記蓋とに挟持された部分における前記第1の低透湿シートの厚さ方向と同じである、
半導体装置。 - 半導体素子と、
前記半導体素子を収容したケースと、
前記半導体素子が収容された前記ケース内に充填された封止材と、
前記封止材を覆い、透湿度が1g/m 2 ×24Hr以下の低透湿性材料からなる第1の低透湿シートと、
前記ケースの開口部を塞ぐ蓋と、
を備え、
前記第1の低透湿シートの周縁部が、前記ケースと前記蓋とに挟持されており、
前記第1の低透湿シートは、前記ケースと前記蓋とに挟持された部分に凸部を有し、
前記ケースは、前記第1の低透湿シートの前記凸部が挿入された溝を有する、
半導体装置。 - 半導体素子と、
前記半導体素子を収容したケースと、
前記半導体素子が収容された前記ケース内に充填された封止材と、
前記封止材を覆い、透湿度が1g/m 2 ×24Hr以下の低透湿性材料からなる第1の低透湿シートと、
前記ケースの開口部を塞ぐ蓋と、
を備え、
前記第1の低透湿シートの周縁部が、前記ケースと前記蓋とに挟持されており、
前記ケースは、前記半導体素子が搭載されたベース板に第2の接着剤を用いて接着されており、
前記ケースと前記ベース板との接着界面に延在し、透湿度が1g/m2×24Hr以下の低透湿性材料からなるフレーム状の第2の低透湿シートをさらに備える、
半導体装置。 - 前記ケースと前記ベース板との接着界面において、前記第2の接着剤は、前記第2の低透湿シートの両側に設けられている、
請求項5に記載の半導体装置。 - 前記ケースおよび前記ベース板は、前記第2の低透湿シートの一部が挿入された溝を備える、
請求項5または請求項6に記載の半導体装置。 - 前記第2の低透湿シートの厚さは、前記第2の接着剤の厚さと同じである、
請求項5または請求項6に記載の半導体装置。 - 半導体素子と、
前記半導体素子を収容したケースと、
前記半導体素子が収容された前記ケース内に充填された封止材と、
前記封止材を覆い、透湿度が1g/m 2 ×24Hr以下の低透湿性材料からなる第1の低透湿シートと、
前記ケースの開口部を塞ぐ蓋と、
を備え、
前記第1の低透湿シートの周縁部が、前記ケースと前記蓋とに挟持されており、
前記第1の低透湿シートの表面に凹凸が設けられている、
半導体装置。 - 前記低透湿性材料は、フッ素系樹脂である、
請求項1から請求項9のいずれか一項に記載の半導体装置。
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