JP7444084B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7444084B2 JP7444084B2 JP2021003999A JP2021003999A JP7444084B2 JP 7444084 B2 JP7444084 B2 JP 7444084B2 JP 2021003999 A JP2021003999 A JP 2021003999A JP 2021003999 A JP2021003999 A JP 2021003999A JP 7444084 B2 JP7444084 B2 JP 7444084B2
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- 239000003566 sealing material Substances 0.000 claims description 14
- 229910000679 solder Inorganic materials 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 7
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- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
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- 239000010703 silicon Substances 0.000 description 2
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- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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。金属製のベース板1の上にケース2が接合されている。ケース2内部においてベース板1の上に絶縁基板3が設けられている。絶縁基板3は、セラミック等の絶縁板4と、絶縁板4の下面の金属パターン5と、絶縁板4の上面の回路パターン6,7,8とを有する。金属パターン5はベース板1にはんだ9により接合されている。回路パターン6,7,8の材料は銅であり、例えばC1020、C1921等である。
図4は、実施の形態2に係る過電流遮断機構を示す斜視図である。図5は、実施の形態2に係る過電流遮断機構を示す断面図である。過電流遮断機構15の第1及び第2の導体部22,23は、絶縁基板3の上面に対して直立した平行平板を構成している。これにより、絶縁基板3からくびれ部24までの距離を確保することができる。従って、過電流が流れてくびれ部24が破裂した際の衝撃を装置の外側に逃がしやすくなり、絶縁基板3の破損を抑制できる。さらに、半導体装置の絶縁性を確保できるため、半導体装置が取り付けられる装置内に電流が漏れるのを防ぐことができる。また、平行平板形状であるため、過電流遮断機構15のインダクタンスの上昇を防ぐことができる。その他の構成及び効果は実施の形態1と同様である。
図6は、実施の形態3に係る過電流遮断機構を示す斜視図である。図7は、実施の形態3に係る過電流遮断機構を示す断面図である。実施の形態2において平行平板となる第1及び第2の導体部22,23同士が接触すると、くびれ部24に電流が流れず、遮断機能が損なわれる。そこで、本実施の形態では、平行平板となる第1及び第2の導体部22,23の間に絶縁物26を挿入している。これにより、平行平板となる第1及び第2の導体部22,23同士が接触して遮断機能が損なわれるのを防ぐことができる。その他の構成及び効果は実施の形態2と同様である。
図8は、実施の形態4に係る過電流遮断機構を示す斜視図である。図9は、実施の形態4に係る過電流遮断機構を示す断面図である。過電流遮断機構15の周りに筐体27が設けられている。くびれ部24が筐体27の内部の空洞に配置され、くびれ部24の少なくとも1面がエポキシ樹脂など硬い封止材20から露出している。これにより、安定した遮断機構を得ることができる。
図12は、実施の形態5に係る過電流遮断機構を示す斜視図である。図13は、実施の形態5に係る過電流遮断機構を示す断面図である。封止材20から露出したくびれ部24が、封止材20とは異なる材料からなる絶縁材28で覆われている。絶縁材28により電流遮断時に周囲部品の損傷を防ぐことができる。この場合、装置上部のフタ21は無くてもよい。
Claims (11)
- 回路パターンを有する絶縁基板と、
前記絶縁基板の上に実装され、前記回路パターンに接続された半導体チップと、
前記回路パターンと同一の材料で構成され、前記回路パターンに直列にはんだにより接続され、過電流が流れると溶融し断線する過電流遮断機構とを備えることを特徴とする半導体装置。 - 前記過電流遮断機構は、第1の導体部と、第2の導体部と、前記第1の導体部と前記第2の導体部の間に接続されたくびれ部とを有することを特徴とする請求項1に記載の半導体装置。
- 前記第1及び第2の導体部の断面積は前記くびれ部の断面積よりも大きいことを特徴とする請求項2に記載の半導体装置。
- 前記第1及び第2の導体部の長さは前記くびれ部の長さよりも大きいことを特徴とする請求項2又は3に記載の半導体装置。
- 前記第1及び第2の導体部の厚みは0.5mm以上であることを特徴とする請求項2~4の何れか1項に記載の半導体装置。
- 前記過電流遮断機構は1つの導電体から構成されることを特徴とする請求項2~5の何れか1項に記載の半導体装置。
- 前記第1及び第2の導体部は、前記絶縁基板の上面に対して直立した平行平板を構成することを特徴とする請求項2~6の何れか1項に記載の半導体装置。
- 前記平行平板となる前記第1及び第2の導体部の間に絶縁物が挿入されていることを特徴とする請求項7に記載の半導体装置。
- 前記絶縁基板及び前記半導体チップを封止する封止材と、
フタとを更に備え、
前記くびれ部の少なくとも1面が、前記封止材から露出し、かつ前記フタにより覆われていることを特徴とする請求項2~8の何れか1項に記載の半導体装置。 - 前記絶縁基板及び前記半導体チップを封止する封止材を更に備え、
前記くびれ部の少なくとも1面が、前記封止材から露出し、前記封止材とは異なる材料からなる絶縁材で覆われていることを特徴とする請求項2~8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1~10の何れか1項に記載の半導体装置。
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