JP7364027B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- 230000001133 acceleration Effects 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
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- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
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Description
特許文献1 特開2015-138801号公報
特許文献2 特開2017-11000号公報
特許文献3 国際公開第2018/030440号
特許文献4 国際公開第2019/142706号
Claims (17)
- トランジスタ部とダイオード部とを備える半導体装置であって、
半導体基板に設けられた第1導電型のドリフト領域と、
前記トランジスタ部および前記ダイオード部において、前記ドリフト領域よりも前記半導体基板のおもて面側に設けられた第1導電型の蓄積領域と、
前記トランジスタ部および前記ダイオード部において、前記半導体基板のおもて面側に設けられた第1ライフタイム制御領域と
を備え、
前記蓄積領域は、
前記ドリフト領域よりも前記おもて面側に設けられた第1の蓄積領域と、
前記第1の蓄積領域の下方に設けられた第2の蓄積領域と
を有し、
前記第1の蓄積領域と前記第2の蓄積領域のドーズ量は同一であり、前記第1の蓄積領域と前記第2の蓄積領域のドーズ量の合計が、1E12cm -2 以上、1E13cm -2 以下である半導体装置。 - 前記第1ライフタイム制御領域は、前記半導体基板の全面に設けられる
請求項1に記載の半導体装置。 - 前記半導体基板の裏面側の全面に設けられた第2ライフタイム制御領域を備える
請求項1または2に記載の半導体装置。 - 前記半導体基板のおもて面に設けられた複数のトレンチ部を備え、
前記第1ライフタイム制御領域の深さは、前記複数のトレンチ部の深さよりも深い
請求項1から3のいずれか一項に記載の半導体装置。 - 前記蓄積領域の深さは、複数のトレンチ部のトレンチ深さ以内である
請求項1から4のいずれか一項に記載の半導体装置。 - 前記第1ライフタイム制御領域の深さは、前記蓄積領域の前記ドリフト領域との境界の深さの2倍よりも深い
請求項1から5のいずれか一項に記載の半導体装置。 - 前記第1ライフタイム制御領域の深さは、5μm以上、20μm以内である
請求項1から6のいずれか一項に記載の半導体装置。 - 前記第1ライフタイム制御領域のライフタイムキラーのドーズ量は、0.5E10cm-2以上、1E13cm-2以下である
請求項1から7のいずれか一項に記載の半導体装置。 - 前記第1ライフタイム制御領域は、前記半導体基板の裏面側から注入されている
請求項8に記載の半導体装置。 - 前記蓄積領域の深さは、1μm以上、5μm以下である
請求項1から9のいずれか一項に記載の半導体装置。 - 前記トランジスタ部は、前記ドリフト領域よりも高ドーピング濃度である第1導電型のエミッタ領域を有し、
前記蓄積領域は、平面視において、前記エミッタ領域が設けられた領域よりも広範囲に設けられる
請求項1から10のいずれか一項に記載の半導体装置。 - 前記トランジスタ部は、
前記ダイオード部と隣接する境界部と、
エミッタ電極と電気的に接続されたダミートレンチ部と
を有し、
前記境界部のトレンチ部は、前記ダミートレンチ部である
請求項1から11のいずれか一項に記載の半導体装置。 - 前記境界部は、
前記蓄積領域と、
前記おもて面側に設けられた第2導電型のベース領域と、
前記ベース領域よりも前記おもて面側に設けられ、前記ベース領域よりもドーピング濃度の高いコンタクト領域と、
前記コンタクト領域のおもて面側に設けられ、前記コンタクト領域よりもドーピング濃度の高い第2導電型のプラグ領域と
を有する
請求項12に記載の半導体装置。 - 前記境界部は、エミッタ領域を有さない
請求項12または13に記載の半導体装置。 - トランジスタ部とダイオード部とを有する半導体装置の製造方法であって、
半導体基板に第1導電型のドリフト領域を設ける段階と、
前記トランジスタ部および前記ダイオード部において、前記ドリフト領域よりも前記半導体基板のおもて面側に第1導電型の蓄積領域を設ける段階と、
前記トランジスタ部および前記ダイオード部において、前記半導体基板のおもて面側に第1ライフタイム制御領域を設ける段階と
を備え、
前記蓄積領域は、
前記ドリフト領域よりも前記おもて面側に設けられた第1の蓄積領域と、
前記第1の蓄積領域の下方に設けられた第2の蓄積領域と
を有し、
前記第1の蓄積領域と前記第2の蓄積領域のドーズ量は同一であり、前記第1の蓄積領域と前記第2の蓄積領域のドーズ量の合計が、1E12cm -2 以上、1E13cm -2 以下である製造方法。 - 前記第1ライフタイム制御領域を設ける段階は、前記半導体基板の裏面側から不純物を照射する段階を有する
請求項15に記載の製造方法。 - 前記第1ライフタイム制御領域を設ける段階は、0.5E10cm-2以上、1E13cm-2以下のドーズ量で不純物を注入する段階を有する
請求項15または16に記載の製造方法。
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