JP7231064B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7231064B2 JP7231064B2 JP2021570669A JP2021570669A JP7231064B2 JP 7231064 B2 JP7231064 B2 JP 7231064B2 JP 2021570669 A JP2021570669 A JP 2021570669A JP 2021570669 A JP2021570669 A JP 2021570669A JP 7231064 B2 JP7231064 B2 JP 7231064B2
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Description
特許文献1 特開2017-135339号公報
特許文献2 特開2014-175517号公報
図1Aは、本実施形態の実施例1に係る半導体装置100の部分上面図である。半導体装置100は、IGBT等のトランジスタ素子を含むトランジスタ部70と、還流ダイオード(FWD)等のダイオード素子を含むダイオード部80とを有する半導体基板を備える。
A≦6W・・・[式(1)]
S1≧(S1+S2)/10・・・[式(2)]
(S1+S2)>S3≧S1・・・[式(3)]
図4は、本実施形態の実施例2に係る半導体装置200の部分断面図である。ここで、半導体装置100と共通する要素には同じ符号を付し、説明を省略する。
図5Aは、本実施形態の実施例3に係る半導体装置300の部分上面図である。ここで、半導体装置100と共通する要素には同じ符号を付し、説明を省略する。
(S1+S2)≧S1>S3・・・[式(4)]
図6Aは、本実施形態の実施例4に係る半導体装置400の部分上面図である。図6Bは、図6Aにおけるa-a'断面を示す図である。ここで、半導体装置100と共通する要素には同じ符号を付し、説明を省略する。
Claims (18)
- トランジスタ部とダイオード部とを有する半導体基板を備え、
前記トランジスタ部は、前記半導体基板の上面視で前記ダイオード部側の端部において、第2導電型キャリアの注入を抑制する注入抑制領域を有し、
前記ダイオード部は、ライフタイムキラーを含むライフタイム制御領域を有し、
前記トランジスタ部及び前記ダイオード部の双方が、前記半導体基板の表面に第2導電型のベース領域を有し、
前記トランジスタ部は、前記半導体基板の表面に、第1導電型のエミッタ領域と、前記ベース領域よりドーピング濃度が高い第2導電型の引き抜き領域とをさらに有し、
前記注入抑制領域には、前記エミッタ領域及び前記引き抜き領域が設けられておらず、
前記ダイオード部の前記ベース領域のドーピング濃度は、1×e 16 cm -3 以上、1×e 18 cm -3 以下であり、
前記ライフタイム制御領域の前記注入抑制領域側の端部は、前記ダイオード部の前記注入抑制領域側の端部より1μm以上、100μm以下の距離だけ前記ダイオード部内に後退した位置にあり、
前記トランジスタ部及び前記注入抑制領域は、
前記トランジスタ部及び前記ダイオード部の延伸方向に延伸し、前記トランジスタ部及び前記ダイオード部の配列方向に配列される複数のトレンチ部の間に、前記延伸方向に延伸する複数のメサ部
を有し、
前記注入抑制領域のメサ部には、前記エミッタ領域又は前記引き抜き領域のいずれかが、前記トランジスタ部側に隣接するメサ部に配置された前記エミッタ領域のそれぞれと隣接するように配置される
半導体装置。 - 前記ライフタイム制御領域は、前記ダイオード部から前記注入抑制領域の少なくとも一部にわたって設けられる
請求項1に記載の半導体装置。 - 前記半導体基板の上面視で、前記注入抑制領域において、前記トランジスタ部及び前記ダイオード部の配列方向における前記ライフタイム制御領域の幅は、20μm以上、1500μm以下である
請求項2に記載の半導体装置。 - 前記半導体基板の上面視で、前記トランジスタ部及び前記ダイオード部の配列方向における前記注入抑制領域の幅は、20μm以上、900μm以下である
請求項1から3のいずれか一項に記載の半導体装置。 - 前記半導体基板の上面視で、前記ダイオード部の延伸方向における端部と活性領域の外周との間に前記注入抑制領域がさらに設けられる
請求項1から4のいずれか一項に記載の半導体装置。 - 前記半導体基板の上面視で、前記ダイオード部の面積は、前記ダイオード部及び前記注入抑制領域の合計面積の10%以上である
請求項1から5の何れか一項に記載の半導体装置。 - 前記半導体基板の上面視で、前記ダイオード部の総面積は、前記半導体装置の面積の1.4%以上、22%以下である
請求項1から6の何れか一項に記載の半導体装置。 - 前記注入抑制領域における前記ベース領域のドーピング濃度は、前記ダイオード部の前記ベース領域のドーピング濃度以下である
請求項1から7の何れか一項に記載の半導体装置。 - 前記注入抑制領域における前記ベース領域のドーピング濃度は、1×e16cm-3以上、5×e19cm-3以下である
請求項8に記載の半導体装置。 - 前記引き抜き領域のドーピング濃度は、5×e18cm-3以上、5×e20cm-3以下である
請求項1から9の何れか一項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基板を備え、
前記トランジスタ部は、前記半導体基板の上面視で前記ダイオード部側の端部において、第2導電型キャリアの注入を抑制する注入抑制領域を有し、
前記ダイオード部は、ライフタイムキラーを含むライフタイム制御領域を有し、
前記トランジスタ部及び前記ダイオード部の双方が、前記半導体基板の表面に第2導電型のベース領域を有し、
前記トランジスタ部及び前記注入抑制領域は、前記半導体基板の表面に、第1導電型のエミッタ領域と、前記ベース領域よりドーピング濃度が高い第2導電型の引き抜き領域とをさらに有し、
前記注入抑制領域における前記エミッタ領域及び前記引き抜き領域の比率は、前記トランジスタ部における前記エミッタ領域及び前記引き抜き領域の比率より低い
半導体装置。 - 前記トランジスタ部及び前記注入抑制領域は、
前記トランジスタ部及び前記ダイオード部の延伸方向に延伸し、前記トランジスタ部及び前記ダイオード部の配列方向に配列される複数のトレンチ部の間に、前記延伸方向に延伸する複数のメサ部
を有し、
前記注入抑制領域のメサ部には、前記エミッタ領域又は前記引き抜き領域のいずれかが、前記トランジスタ部側に隣接するメサ部に配置された前記エミッタ領域のそれぞれと隣接するように配置される
請求項11に記載の半導体装置。 - 前記注入抑制領域の前記エミッタ領域は、前記延伸方向において前記引き抜き領域と隣接する
請求項12に記載の半導体装置。 - 前記注入抑制領域において前記ダイオード部に隣接するメサ部には、前記エミッタ領域が配置されていない
請求項1および11から13のいずれか一項に記載の半導体装置。 - 前記半導体基板の上面視で、前記トランジスタ部及び前記ダイオード部の延伸方向において、前記引き抜き領域の長さは0.5μm以上である
請求項1および11から14の何れか一項に記載の半導体装置。 - 前記半導体基板の上面視で、前記トランジスタ部及び前記ダイオード部の配列方向において、前記引き抜き領域の長さは0.3μm以上である
請求項1および11から15の何れか一項に記載の半導体装置。 - 前記注入抑制領域において、前記半導体基板の上面視で前記エミッタ領域及び前記引き抜き領域が配置されていない部分に前記ベース領域が配置されている
請求項1および11から16の何れか一項に記載の半導体装置。 - 前記半導体基板の内部において、第1導電型の蓄積領域をさらに有する
請求項1から17の何れか一項に記載の半導体装置。
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