JP2020145307A - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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Abstract
Description
図1は、実施の形態1に係る半導体装置を示す断面図である。図2は、実施の形態1に係る半導体装置の内部を示す平面図である。図1は図2のI−IIに沿った断面に対応する。
図9は、実施の形態2に係る半導体装置を示す断面図である。ケース10の窪み23とカバー20の嵌合部20bを無くし、その代わりにカバー20が接着剤25によりケース10に取り付けられている。これにより、ケース10とカバー20の設計自由度を向上させることができる。その他の構成及び効果は実施の形態1と同様である。
図10は、実施の形態3に係る半導体装置を示す断面図である。凹部20aがカバー20の上面に設けられている。この場合でも実施の形態1と同様の効果を得ることができる。ただし、カバー20が半導体チップ6,7等の内部部品に近づくため、内部部品上部の封止樹脂21とカバー20の剛性の合計値が下がるような設計が必要である。例えば、カバー20の厚みを薄くするか又はヤング率の低い材料を選択するなど、カバー20の剛性を下げる必要がある。
図11及び図12は、実施の形態4に係る半導体装置の製造方法を示す断面図である。図11に示すように、封止樹脂21を全てポッティングした際に空洞22が想定通り形成できた場合の封止樹脂21の水位においてケース10の内側面に水位基準線26を形成しておく。図12に示すように、カバー20の凹部20aに封止樹脂21が入り込んで空洞22を想定通りに形成できていない場合、封止樹脂21の水位が水位基準線26より低くなる。そこで、封止樹脂21を全てポッティングした際の封止樹脂21の水位が水位基準線26より低い場合に空洞22の形成不良と判定する。これにより不良品を容易に判定することができる。
Claims (9)
- 半導体チップと、
前記半導体チップを収納するケースと、
前記半導体チップにボンディングされたワイヤと、
前記ケースの内部に固定され、前記半導体チップ及び前記ワイヤの上方に凹部を有するカバーと、
前記ケースの内部にポッティングされ、前記半導体チップ、前記ワイヤ及び前記カバーを封止する封止樹脂とを備え、
前記凹部の内部に前記封止樹脂が充填されず空洞が設けられていることを特徴とする半導体装置。 - 前記凹部は前記カバーの下面に設けられていることを特徴とする請求項1に記載の半導体装置。
- 前記凹部は前記カバーの上面に設けられていることを特徴とする請求項1に記載の半導体装置。
- 前記カバーは前記ケースに嵌合されていることを特徴とする請求項1〜3の何れか1項に記載の半導体装置。
- 前記カバーは接着剤により前記ケースに取り付けられていることを特徴とする請求項1〜3の何れか1項に記載の半導体装置。
- 前記半導体チップはワイドバンドギャップ半導体によって形成されていることを特徴とする請求項1〜5の何れか1項に記載の半導体装置。
- 半導体チップをケースに収納し、前記半導体チップにワイヤをボンディングする工程と、
前記半導体チップ及び前記ワイヤの上方にカバーの凹部が位置するように前記カバーを前記ケースの内部に固定する工程と、
前記ケースの内部に封止樹脂をポッティングして前記半導体チップ、前記ワイヤ及び前記カバーを封止する工程とを備え、
前記凹部の内部に前記封止樹脂が充填されず空洞が設けられていることを特徴とする半導体装置の製造方法。 - 前記封止樹脂の一部のみをポッティングして前記半導体チップ及び前記ワイヤを封止する工程と、
前記封止樹脂の前記一部をポッティングした後に前記半導体チップ及び前記ワイヤの上方に前記カバーを固定する工程と、
前記封止樹脂の残りをポッティングして前記カバーを封止する工程とを備えることを特徴とする請求項7に記載の半導体装置の製造方法。 - 前記封止樹脂を全てポッティングした際の前記封止樹脂の水位が、前記ケースの内側面に形成された水位基準線より低い場合に前記空洞の形成不良と判定することを特徴とする請求項7又は8に記載の半導体装置の製造方法。
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