JP7359053B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7359053B2 JP7359053B2 JP2020056272A JP2020056272A JP7359053B2 JP 7359053 B2 JP7359053 B2 JP 7359053B2 JP 2020056272 A JP2020056272 A JP 2020056272A JP 2020056272 A JP2020056272 A JP 2020056272A JP 7359053 B2 JP7359053 B2 JP 7359053B2
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Description
図1から図5を用いて実施の形態1に係る半導体装置の構成を説明する。図1および図2は実施の形態1に係る半導体装置を示す平面図である。図2は、図1に記載のA部を拡大した平面図であり、半導体基板の第1主面側の構造を示す平面図である。図2において、半導体基板の第1主面より上側に設けられる電極等の記載は省略している。図3から図5は実施の形態1に係る半導体装置を示す断面図である。図3は図2に記載のB-B線での断面図である。図4は図2に記載のC-C線での断面図である。図5は図2に記載のD-D線での断面図である。図1から図5には説明の便宜上のために方向を示すXYZ直交座標軸も示している。
図13および図14を用いて実施の形態2に係る半導体装置の構成を説明する。図13および図14は実施の形態2に係る半導体装置を示す平面図である。図14は、図13に記載のE部を拡大した図であり、半導体基板の第1主面側の構造を示す平面図である。図14において、半導体基板の第1主面より上側に設けられる電極等の記載は省略している。図13および図14には説明の便宜上のために方向を示すXYZ直交座標軸も示している。なお、実施の形態2において、実施の形態1で説明したものと同一の構成要素については同一符号を付して説明は省略する。
図15および図16を用いて実施の形態3に係る半導体装置の構成を説明する。図15および図16は実施の形態3に係る半導体装置を示す平面図である。図16は、図15に記載のF部を拡大した図であり、半導体基板の第1主面側の構造を示す平面図である。図16において、半導体基板の第1主面より上側に設けられる電極等の記載は省略している。図15および図16には説明の便宜上のために方向を示すXYZ直交座標軸も示している。なお、実施の形態3において、実施の形態1および2で説明したものと同一の構成要素については同一符号を付して説明は省略する。
2 ダイオード領域
6a ゲート絶縁膜
7a ゲート電極
8 エミッタ層
9 ベース層
10 キャリア注入抑制層
11 アノード層
12 ドリフト層
13 コレクタ層
15 カソード層
20 絶縁ゲート型バイポーラトランジスタ領域
21 キャリア注入抑制層
30 絶縁ゲート型バイポーラトランジスタ領域
30a 第1の領域
30b 第2の領域
31 キャリア注入抑制層
100 半導体装置
200 半導体装置
300 半導体装置
S1 第1主面
S2 第2主面
W1 エミッタ層の幅
W2 キャリア注入抑制層の幅
Claims (8)
- 第1主面と前記第1主面に対向する第2主面との間に第1導電型のドリフト層を有する半導体基板に、絶縁ゲート型バイポーラトランジスタ領域およびダイオード領域が隣接して設けられた半導体装置であって、
前記絶縁ゲート型バイポーラトランジスタ領域は、
前記半導体基板の前記第1主面側の表層に設けられた第2導電型のベース層と、
前記ベース層の前記第1主面側の表層に選択的に設けられた第1導電型のエミッタ層と、
前記半導体基板の前記第1主面側に設けられ、前記第1主面に沿った第1方向に複数並んで配置され、ゲート絶縁膜を介して前記エミッタ層、前記ベース層および前記ドリフト層に面するゲート電極と、
前記ベース層の前記第1主面側の表層に選択的に設けられ、前記第1方向で前記第1方向に互いに隣接する前記ゲート電極間で前記ベース層に挟まれた第1導電型のキャリア注入抑制層と、
前記半導体基板の前記第2主面側の表層に設けられた第2導電型のコレクタ層と、を備え、
前記ダイオード領域は、
前記半導体基板の前記第1主面側の表層に設けられた第2導電型のアノード層と、
前記半導体基板の前記第2主面側の表層に設けられた第1導電型のカソード層と、を備え、
平面視において、互いに隣接する前記ゲート電極間における前記キャリア注入抑制層が配置された面積の比率は、前記ダイオード領域に近いほど大きい、
半導体装置。 - 前記キャリア注入抑制層は、前記第1方向と直交し前記第1主面に沿った第2方向で前記エミッタ層に挟まれて配置されている、
請求項1に記載の半導体装置。 - 前記第2方向において前記エミッタ層と前記キャリア注入抑制層とが接している、
請求項2に記載の半導体装置。 - 平面視において前記キャリア注入抑制層および前記エミッタ層のそれぞれは長手方向と前記長手方向と直交する方向に短手方向とを有し、
前記キャリア注入抑制層の短手方向の幅は前記エミッタ層の短手方向の幅よりも狭い、
請求項1から3のいずれか1項に記載の半導体装置。 - 前記絶縁ゲート型バイポーラトランジスタ領域は、互いに隣接する前記ゲート電極間に前記キャリア注入抑制層が設けられた第1の領域と、互いに隣接する前記ゲート電極間に前記キャリア注入抑制層が設けられていない第2の領域と、を有し、
前記第1の領域は、前記第2の領域より前記ダイオード領域に近い、
請求項1から4のいずれか1項に記載の半導体装置。 - 前記エミッタ層と前記キャリア注入抑制層とは同一の第1導電型の不純物を有する、
請求項1から5のいずれか1項に記載の半導体装置。 - 前記ベース層は、
前記第1主面側の表層に高不純物濃度ベース層と、
前記高不純物濃度ベース層よりも前記第2主面側に設けられ、前記高不純物濃度ベース層よりも不純物濃度の低い低不純物濃度ベース層と、
を有する、
請求項1から6のいずれか1項に記載の半導体装置。 - 前記アノード層は、
前記第1主面側の表層に高不純物濃度アノード層と、
前記高不純物濃度アノード層よりも前記第2主面側に設けられ、前記高不純物濃度アノード層よりも不純物濃度の低い低不純物濃度アノード層と、
を有する、
請求項1から7のいずれか1項に記載の半導体装置。
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