JP7211516B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7211516B2 JP7211516B2 JP2021532693A JP2021532693A JP7211516B2 JP 7211516 B2 JP7211516 B2 JP 7211516B2 JP 2021532693 A JP2021532693 A JP 2021532693A JP 2021532693 A JP2021532693 A JP 2021532693A JP 7211516 B2 JP7211516 B2 JP 7211516B2
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- Engineering & Computer Science (AREA)
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Electrodes Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Description
特許文献1 WO2018/105299号
Claims (15)
- 第1導電型のドリフト領域を含む半導体基板と、
前記半導体基板の上面と前記ドリフト領域との間に設けられた第2導電型のベース領域を含む内側領域と、
前記ベース領域よりドーピング濃度が高く、且つ、前記半導体基板の上面から前記ベース領域の下端よりも深い位置まで設けられ、前記半導体基板の上面において前記内側領域を挟んで配置されたウェル領域と
を備え、
前記内側領域は、前記半導体基板の前記上面における予め定められた長手方向に長手を有し、前記半導体基板の前記上面から前記ドリフト領域に達するトレンチ部を複数有し、
少なくとも一つの前記トレンチ部は、前記ウェル領域と重ならない領域において、前記長手方向に2つ以上の部分トレンチに分離し、
前記内側領域は、ゲート電圧が印加されるゲートトレンチ部を含むトランジスタ部と、エミッタ電圧が印加されるダミートレンチ部を含むダイオード部とを有し、
前記ダイオード部における少なくとも一つの前記ダミートレンチ部が、前記部分トレンチを有し、
前記ダイオード部の前記ダミートレンチ部は、前記長手方向において2つ以上の部分トレンチに分離している
半導体装置。 - 第1導電型のドリフト領域を含む半導体基板と、
前記半導体基板の上面と前記ドリフト領域との間に設けられた第2導電型のベース領域を含む内側領域と、
前記ベース領域よりドーピング濃度が高く、且つ、前記半導体基板の上面から前記ベース領域の下端よりも深い位置まで設けられ、前記半導体基板の上面において前記内側領域を挟んで配置されたウェル領域と
を備え、
前記内側領域は、前記半導体基板の前記上面における予め定められた長手方向に長手を有し、前記半導体基板の前記上面から前記ドリフト領域に達するトレンチ部を複数有し、
少なくとも一つの前記トレンチ部は、前記ウェル領域と重ならない領域において、前記長手方向に2つ以上の部分トレンチに分離し、
前記内側領域は、ゲート電圧が印加されるゲートトレンチ部を含むトランジスタ部と、エミッタ電圧が印加されるダミートレンチ部を含むダイオード部とを有し、
前記ダイオード部における少なくとも一つの前記ダミートレンチ部が、前記部分トレンチを有し、
前記ダイオード部は、前記長手方向において隣り合う2つの前記部分トレンチの間において、前記半導体基板の前記上面と接して設けられた、第1導電型の第1トレンチ間領域を有する
半導体装置。 - 前記ダイオード部は、前記半導体基板の前記上面の前記長手方向と直交する方向において、前記第1トレンチ間領域を挟む第2導電型の領域を有する
請求項2に記載の半導体装置。 - 前記ダイオード部は、前記半導体基板の前記上面の前記長手方向と直交する方向において、前記第1トレンチ間領域を挟む第1導電型の領域を有する
請求項2に記載の半導体装置。 - 前記ダイオード部は、前記長手方向において隣り合う2つの前記部分トレンチの間において、前記半導体基板の前記上面と接して設けられた、第2導電型の第2トレンチ間領域を更に有し、
前記第1トレンチ間領域は、前記第2トレンチ間領域よりも、前記トランジスタ部から離れて配置されている
請求項2から4のいずれか一項に記載の半導体装置。 - 第1導電型のドリフト領域を含む半導体基板と、
前記半導体基板の上面と前記ドリフト領域との間に設けられた第2導電型のベース領域を含む内側領域と、
前記ベース領域よりドーピング濃度が高く、且つ、前記半導体基板の上面から前記ベース領域の下端よりも深い位置まで設けられ、前記半導体基板の上面において前記内側領域を挟んで配置されたウェル領域と
を備え、
前記内側領域は、前記半導体基板の前記上面における予め定められた長手方向に長手を有し、前記半導体基板の前記上面から前記ドリフト領域に達するトレンチ部を複数有し、
少なくとも一つの前記トレンチ部は、前記ウェル領域と重ならない領域において、前記長手方向に2つ以上の部分トレンチに分離し、
前記内側領域は、
前記長手方向において隣り合う2つの前記部分トレンチの間において、前記半導体基板の前記上面と接して設けられたトレンチ間領域と、
前記トレンチ間領域の下方に設けられ、2つの前記部分トレンチを接続する埋没トレンチと
を有する半導体装置。 - 前記長手方向と直交する方向において前記第1トレンチ間領域を挟んで配置された2つの前記トレンチ部は、第1間隔で配置されており、
前記長手方向において前記第1トレンチ間領域を挟んで配置された2つの前記部分トレンチの距離は、前記第1間隔より小さい
請求項2から5のいずれか一項に記載の半導体装置。 - 前記長手方向において前記第1トレンチ間領域を挟んで配置された2つの前記部分トレンチの距離は、前記長手方向と直交する方向において隣り合う前記部分トレンチの距離より小さい
請求項2から5のいずれか一項に記載の半導体装置。 - 前記長手方向において前記第1トレンチ間領域を挟んで配置された2つの前記部分トレンチの距離は、前記長手方向と直交する方向における前記部分トレンチの幅より小さい
請求項2から5のいずれか一項に記載の半導体装置。 - 第1導電型のドリフト領域を含む半導体基板と、
前記半導体基板の上面と前記ドリフト領域との間に設けられた第2導電型のベース領域を含む内側領域と、
前記ベース領域よりドーピング濃度が高く、且つ、前記半導体基板の上面から前記ベース領域の下端よりも深い位置まで設けられ、前記半導体基板の上面において前記内側領域を挟んで配置されたウェル領域と
を備え、
前記内側領域は、前記半導体基板の前記上面における予め定められた長手方向に長手を有し、前記半導体基板の前記上面から前記ドリフト領域に達するトレンチ部を複数有し、
少なくとも一つの前記トレンチ部は、前記ウェル領域と重ならない領域において、前記長手方向に2つ以上の部分トレンチに分離し、
前記内側領域は、ゲート電圧が印加されるゲートトレンチ部およびエミッタ電圧が印加されるダミートレンチ部を含むトランジスタ部と、前記ダミートレンチ部を含むダイオード部とを有し、
前記トランジスタ部における少なくとも一つの前記ダミートレンチ部が、前記部分トレンチを有する
半導体装置。 - 前記トランジスタ部の前記ダミートレンチ部は、前記長手方向において2つ以上の部分トレンチに分離している
請求項10に記載の半導体装置。 - 第1導電型のドリフト領域を含む半導体基板と、
前記半導体基板の上面と前記ドリフト領域との間に設けられた第2導電型のベース領域を含む内側領域と、
前記ベース領域よりドーピング濃度が高く、且つ、前記半導体基板の上面から前記ベース領域の下端よりも深い位置まで設けられ、前記半導体基板の上面において前記内側領域を挟んで配置されたウェル領域と
を備え、
前記内側領域は、前記半導体基板の前記上面における予め定められた長手方向に長手を有し、前記半導体基板の前記上面から前記ドリフト領域に達するトレンチ部を複数有し、
少なくとも一つの前記トレンチ部は、前記ウェル領域と重ならない領域において、前記長手方向に2つ以上の部分トレンチに分離し、
前記内側領域は、ゲート電圧が印加されるゲートトレンチ部を含むトランジスタ部と、エミッタ電圧が印加されるダミートレンチ部を含むダイオード部とを有し、
前記トランジスタ部における少なくとも一つの前記ゲートトレンチ部が、前記部分トレンチを有し、
前記トランジスタ部の前記ゲートトレンチ部は、前記長手方向において2つ以上の部分トレンチに分離している
半導体装置。 - 前記部分トレンチは、導電部を有し、
前記長手方向において隣り合う前記部分トレンチの前記導電部は、同じ電極に接続している
請求項1から12のいずれか一項に記載の半導体装置。 - 前記長手方向において隣り合う前記部分トレンチの前記導電部は、同電位である
請求項13に記載の半導体装置。 - 第1導電型のドリフト領域を含む半導体基板と、
前記半導体基板の上面と前記ドリフト領域との間に設けられた第2導電型のベース領域を含む内側領域と、
前記ベース領域よりドーピング濃度が高く、且つ、前記半導体基板の上面から前記ベース領域の下端よりも深い位置まで設けられ、前記半導体基板の上面において前記内側領域を挟んで配置されたウェル領域と
を備え、
前記内側領域は、前記半導体基板の前記上面における予め定められた長手方向に長手を有し、前記半導体基板の前記上面から前記ドリフト領域に達するトレンチ部を複数有し、
少なくとも一つの前記トレンチ部は、前記ウェル領域と重ならない領域において、前記長手方向に2つ以上の部分トレンチに分離し、
前記部分トレンチは、導電部を有し、
前記長手方向において隣り合う前記部分トレンチの前記導電部は、同じ電極に接続している
半導体装置。
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