JP6907670B2 - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- JP6907670B2 JP6907670B2 JP2017081446A JP2017081446A JP6907670B2 JP 6907670 B2 JP6907670 B2 JP 6907670B2 JP 2017081446 A JP2017081446 A JP 2017081446A JP 2017081446 A JP2017081446 A JP 2017081446A JP 6907670 B2 JP6907670 B2 JP 6907670B2
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Description
本発明に係る半導体装置の製造方法は、基板の上面に設けられた金属パターンの上に半導体チップを搭載する工程と、該基板を囲むケースと、平板状の裏面電極端子と、を設ける工程と、該裏面電極端子と該金属パターンとをワイヤで接続するワイヤボンド工程と、該裏面電極端子と並行し該半導体チップの直上まで伸びる平板状の表面電極端子を、該裏面電極端子の上方に設け、該表面電極端子と該半導体チップの上面とを接合する工程と、ワイヤボンド工程よりも後に、該ケースの内部を封止材で封止する封止工程と、を備え、該封止工程よりも後に、該表面電極端子を該裏面電極端子の上方に設ける。
本発明に係る半導体装置の製造方法では、表面電極端子が半導体チップの上面と直接接合される。このため、ワイヤによる接続と比較して、表面電極端子と半導体チップとの接合部の熱サイクルストレスに対する耐性を高めることができる。また、一般に表面電極端子側と比較して低温となる裏面電極端子をワイヤで接続することにより、裏面電極端子を半導体チップと直接接合する場合と比較して半導体装置を小型化できる。従って、半導体装置を長寿命化および小型化できる。
図1は、実施の形態1に係る半導体装置100の断面図である。半導体装置100は、ベース板10を備える。ベース板10は、銅またはアルミ等から形成される。ベース板10の上には基板16が設けられる。基板16の裏面には金属パターン18が設けられる。基板16は金属パターン18を介してはんだ14によりベース板10に接合されている。基板16は上面に金属パターン20を有する。基板16および金属パターン18、20は絶縁基板を構成する。
図4は実施の形態2に係る半導体装置300の断面図である。半導体装置300において、裏面電極端子28は、ケース326と一体化されている。また、表面電極端子32はケース326および裏面電極端子28とは別に設けられる。表面電極端子32は、ケース326の上に取り付けられる。これにより、表面電極端子32は裏面電極端子28の上方に設けられる。図4は、表面電極端子32がケース326から取り外された状態を示す。また、図4において、便宜上、封止材44およびフタ46は省略されている。
図7は、実施の形態3に係る半導体装置400の断面図である。半導体装置400は、ベース板10とはんだ14を備えない。本実施の形態に係る基板416は、ベース板をかねる構造を備える。基板416の裏面には金属パターン418が設けられる。基板416の上面には金属パターン420が設けられる。基板416および金属パターン418、420は絶縁基板を構成する。
Claims (10)
- 上面に金属パターンを有する基板と、
前記金属パターンの上に設けられた半導体チップと、
前記金属パターンとワイヤで接続された平板状の裏面電極端子と、
前記裏面電極端子の上方において前記裏面電極端子と並行し、前記半導体チップの直上まで伸び、前記半導体チップの上面と接合された平板状の表面電極端子と、
前記基板を囲むケースと、
前記ケースの内部を封止する封止材と、
を備え、
前記裏面電極端子は、前記ケースと一体化され、
前記表面電極端子は、前記ケースの上に取り付けられることで前記裏面電極端子の上方に設けられることを特徴とする半導体装置。 - 前記半導体チップを複数備え、
前記表面電極端子は、リードフレームを備え、
前記リードフレームは、前記複数の半導体チップの上面と接合されることを特徴とする請求項1に記載の半導体装置。 - 前記ケースは、前記基板を隙間なく囲むことを特徴とする請求項1または2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、スイッチング素子とダイオードとを備え、
前記スイッチング素子と前記ダイオードの一方はワイドバンドギャップ半導体によって形成され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。 - 前記ワイドバンドギャップ半導体は、炭化珪素、窒化ガリウム系材料またはダイヤモンドであることを特徴とする請求項4または5に記載の半導体装置。
- 前記表面電極端子は、前記半導体チップの上面とはんだで接合されることを特徴とする請求項1〜6の何れか1項に記載の半導体装置。
- 基板の上面に設けられた金属パターンの上に半導体チップを搭載する工程と、
前記基板を囲むケースと、平板状の裏面電極端子と、を設ける工程と、
前記裏面電極端子と前記金属パターンとをワイヤで接続するワイヤボンド工程と、
前記裏面電極端子と並行し前記半導体チップの直上まで伸びる平板状の表面電極端子を、前記裏面電極端子の上方に設け、前記表面電極端子と前記半導体チップの上面とを接合する工程と、
ワイヤボンド工程よりも後に、前記ケースの内部を封止材で封止する封止工程と、
を備え、
前記ケースと前記裏面電極端子とは一体成形され、
前記表面電極端子を前記ケースの上に取り付けることで、前記表面電極端子は前記裏面電極端子の上方に設けられることを特徴とする半導体装置の製造方法。 - 基板の上面に設けられた金属パターンの上に半導体チップを搭載する工程と、
前記基板を囲むケースと、平板状の裏面電極端子と、を設ける工程と、
前記裏面電極端子と前記金属パターンとをワイヤで接続するワイヤボンド工程と、
前記裏面電極端子と並行し前記半導体チップの直上まで伸びる平板状の表面電極端子を、前記裏面電極端子の上方に設け、前記表面電極端子と前記半導体チップの上面とを接合する工程と、
ワイヤボンド工程よりも後に、前記ケースの内部を封止材で封止する封止工程と、
を備え、
前記封止工程よりも後に、前記表面電極端子を前記裏面電極端子の上方に設けることを特徴とする半導体装置の製造方法。 - 前記表面電極端子は、前記半導体チップの上面とはんだで接合されることを特徴とする請求項8または9に記載の半導体装置の製造方法。
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