JP7533146B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7533146B2 JP7533146B2 JP2020190383A JP2020190383A JP7533146B2 JP 7533146 B2 JP7533146 B2 JP 7533146B2 JP 2020190383 A JP2020190383 A JP 2020190383A JP 2020190383 A JP2020190383 A JP 2020190383A JP 7533146 B2 JP7533146 B2 JP 7533146B2
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- 108010075750 P-Type Calcium Channels Proteins 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
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Description
本開示に係る半導体装置は、基板に形成され、該基板の上面側に、p型アノード領域と、該p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、該基板に形成され、境界領域を介して該FWD領域を平面視で囲み、該基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、該FWD領域と該境界領域と該IGBT領域を平面視で囲む外周領域と、該基板の上面のエミッタ電極と、を備え、該第1トレンチは、平面視で該FWD領域の外縁に沿って環状に形成され、該第2トレンチは、平面視で該境界領域の外縁に沿って環状に形成され、該境界領域の上面側にはp型領域のみがあり、該p型領域は、第1p型領域と、該第1p型領域よりp型不純物濃度が低い第2p型領域と、を有し、該第1p型領域と該第2p型領域は該エミッタ電極に接し、該第1p型コンタクト領域は、ユニットセル毎に形成され、かつ平面視で該第1トレンチと平行に細長い形状を有し、該第1p型領域は、平面視で該FWD領域を囲む環状の形状を有することを特徴とする。
本開示に係る半導体装置は、基板に形成され、該基板の上面側に、p型アノード領域と、該p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、該基板に形成され、境界領域を介して該FWD領域を平面視で囲み、該基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、該FWD領域と該境界領域と該IGBT領域を平面視で囲む外周領域と、を備え、該第1トレンチは、平面視で該FWD領域の外縁に沿って環状に形成され、該第2トレンチは、平面視で該境界領域の外縁に沿って環状に形成され、該境界領域の上面側にはp型領域のみがあり、該第1p型コンタクト領域は、ユニットセル毎に形成され、かつ平面視で該第1トレンチと平行に、複数の長方形部分を有し、該複数の長方形部分の各々の長手方向長さは、該複数の長方形部分の間の距離より大きいことを特徴とする。
本開示に係る半導体装置は、基板に形成され、該基板の上面側に、p型アノード領域と、該p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、該基板に形成され、境界領域を介して該FWD領域を平面視で囲み、該基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、該FWD領域と該境界領域と該IGBT領域を平面視で囲む外周領域と、該基板の上面のエミッタ電極と、を備え、該第1トレンチは、平面視で該FWD領域の外縁に沿って環状に形成され、該第2トレンチは、平面視で該境界領域の外縁に沿って環状に形成され、該境界領域の上面側にはp型領域のみがあり、該p型領域は、第1p型領域と、該第1p型領域よりp型不純物濃度が低い第2p型領域と、を有し、該第1p型領域と該第2p型領域は該エミッタ電極に接し、該p型アノード領域は、平面視で直線的に形成され平面視で該第1p型コンタクト領域と重なる部分と、平面視で直線的に形成され平面視で該第1p型コンタクト領域と重ならない部分と、を有し、平面視で、該第1p型領域と該第2p型領域が交互に設けられたことで、該p型領域が環状になっていることを特徴とする。
図1は、実施の形態1に係る半導体装置100の平面図である。図1にはチップ状態の半導体装置の全体が示されている。この半導体装置は、IGBT領域101、FWD領域102、外周領域103及びゲートパッド領域104を備えるRC-IGBTである。主電極領域はIGBT領域101とFWD領域102で形成されている。IGBT領域101は平面視で境界領域を介してFWD領域102を囲む。そして、主電極領域の周りに外周領域103が形成されている。外周領域103は、FWD領域102と境界領域とIGBT領域101を平面視で囲む。
図6は、実施の形態2に係る半導体装置の一部平面図である。図6は、図1の破線部分の平面図に対応する。図7-9はそれぞれ、図6に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図10は、実施の形態3に係る半導体装置の一部平面図である。図10は、図1の破線部分の平面図に対応する。図11-13はそれぞれ、図10に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図14は、実施の形態4に係る半導体装置の一部平面図である。図14は、図1の破線部分の平面図に対応する。図15-17はそれぞれ、図14に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図18は、実施の形態5に係る半導体装置の一部平面図である。図18は、図1の破線部分の平面図に対応する。図19-21はそれぞれ、図18に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図22は、実施の形態6に係る半導体装置の一部平面図である。図22は、図1の破線部分の平面図に対応する。図23-25はそれぞれ、図22に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図26は、実施の形態7に係る半導体装置の一部平面図である。図26は、図1の破線部分の平面図に対応する。図27-29はそれぞれ、図26に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図30は、実施の形態8に係る半導体装置の一部平面図である。図30は、図1の破線部分の平面図に対応する。図31-33はそれぞれ、図30に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図34は、実施の形態9に係る半導体装置の一部平面図である。図34は、図1の破線部分の平面図に対応する。図35-37はそれぞれ、図34に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図38は、実施の形態10に係る半導体装置の一部平面図である。図38は、図1の破線部分の平面図に対応する。図39-41はそれぞれ、図38に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
図42は、実施の形態11に係る半導体装置の一部平面図である。図42は、図1の破線部分の平面図に対応する。図43-45はそれぞれ、図42に示されたA´-A´線における断面図、B´-B´線における断面図、C´-C´線における断面図である。
Claims (12)
- 基板に形成され、前記基板の上面側に、p型アノード領域と、前記p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、
前記基板に形成され、境界領域を介して前記FWD領域を平面視で囲み、前記基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、
前記FWD領域と前記境界領域と前記IGBT領域を平面視で囲む外周領域と、
前記基板の上面のエミッタ電極と、
を備え、
前記第1トレンチは、平面視で前記FWD領域の外縁に沿って環状に形成され、
前記第2トレンチは、平面視で前記境界領域の外縁に沿って環状に形成され、
前記境界領域の上面側にはp型領域のみがあり、
前記p型領域は、第1p型領域と、前記第1p型領域よりp型不純物濃度が低い第2p型領域と、を有し、
前記第1p型領域と前記第2p型領域は前記エミッタ電極に接し、
平面視で、前記FWD領域におけるユニットセルあたりの前記第1p型コンタクト領域の面積比率を第1面積比率、前記境界領域におけるユニットセルあたりの前記第1p型領域の面積比率を第2面積比率、前記IGBT領域におけるユニットセルあたりの前記第2p型コンタクト領域の面積比率を第3面積比率としたとき、前記第1面積比率と前記第2面積比率の和は、前記第3面積比率よりも小さいことを特徴とする半導体装置。 - 平面視で、前記FWD領域におけるユニットセルあたりの前記p型アノード領域の面積比率を第4面積比率、前記境界領域におけるユニットセルあたりの前記第2p型領域の面積比率を第5面積比率としたとき、前記第1面積比率と前記第2面積比率の和は、前記第4面積比率と前記第5面積比率の和より小さいことを特徴とする請求項1に記載の半導体装置。
- 前記外周領域はp型のウェル領域を有し、平面視で前記ウェル領域と前記第2p型コンタクト領域が接したことを特徴とする請求項1または2に記載の半導体装置。
- 基板に形成され、前記基板の上面側に、p型アノード領域と、前記p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、
前記基板に形成され、境界領域を介して前記FWD領域を平面視で囲み、前記基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、
前記FWD領域と前記境界領域と前記IGBT領域を平面視で囲む外周領域と、
前記基板の上面のエミッタ電極と、
を備え、
前記第1トレンチは、平面視で前記FWD領域の外縁に沿って環状に形成され、
前記第2トレンチは、平面視で前記境界領域の外縁に沿って環状に形成され、
前記境界領域の上面側にはp型領域のみがあり、
前記p型領域は、第1p型領域と、前記第1p型領域よりp型不純物濃度が低い第2p型領域と、を有し、
前記第1p型領域と前記第2p型領域は前記エミッタ電極に接し、
前記第1p型コンタクト領域は、ユニットセル毎に形成され、かつ平面視で前記第1トレンチと平行に細長い形状を有し、
前記第1p型領域は、平面視で前記FWD領域を囲む環状の形状を有することを特徴とする半導体装置。 - 平面視で、前記第2p型領域が前記第2トレンチに接し、前記第1p型領域は前記第2トレンチに接しないことを特徴とする請求項1に記載の半導体装置。
- 基板に形成され、前記基板の上面側に、p型アノード領域と、前記p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、
前記基板に形成され、境界領域を介して前記FWD領域を平面視で囲み、前記基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、
前記FWD領域と前記境界領域と前記IGBT領域を平面視で囲む外周領域と、を備え、
前記第1トレンチは、平面視で前記FWD領域の外縁に沿って環状に形成され、
前記第2トレンチは、平面視で前記境界領域の外縁に沿って環状に形成され、
前記境界領域の上面側にはp型領域のみがあり、
前記第1p型コンタクト領域は、ユニットセル毎に形成され、かつ平面視で前記第1トレンチと平行に、複数の長方形部分を有し、前記複数の長方形部分の各々の長手方向長さは、前記複数の長方形部分の間の距離より大きいことを特徴とする半導体装置。 - 基板に形成され、前記基板の上面側に、p型アノード領域と、前記p型アノード領域よりもp型不純物濃度が高い第1p型コンタクト領域と、第1トレンチと、を有するFWD領域と、
前記基板に形成され、境界領域を介して前記FWD領域を平面視で囲み、前記基板の上面側に、n型エミッタ領域と、第2p型コンタクト領域と、第2トレンチと、を有するIGBT領域と、
前記FWD領域と前記境界領域と前記IGBT領域を平面視で囲む外周領域と、
前記基板の上面のエミッタ電極と、
を備え、
前記第1トレンチは、平面視で前記FWD領域の外縁に沿って環状に形成され、
前記第2トレンチは、平面視で前記境界領域の外縁に沿って環状に形成され、
前記境界領域の上面側にはp型領域のみがあり、
前記p型領域は、第1p型領域と、前記第1p型領域よりp型不純物濃度が低い第2p型領域と、を有し、
前記第1p型領域と前記第2p型領域は前記エミッタ電極に接し、
前記p型アノード領域は、平面視で直線的に形成され平面視で前記第1p型コンタクト領域と重なる部分と、平面視で直線的に形成され平面視で前記第1p型コンタクト領域と重ならない部分と、を有し、
平面視で、前記第1p型領域と前記第2p型領域が交互に設けられたことで、前記p型領域が環状になっていることを特徴とする半導体装置。 - 前記第1p型コンタクト領域と前記第1p型領域の面積の和は、前記p型アノード領域と前記第2p型領域の面積の和より小さいことを特徴とする請求項7に記載の半導体装置。
- 平面視で前記第1p型コンタクト領域の面積は前記p型アノード領域の面積より小さいことを特徴とする請求項6に記載の半導体装置。
- 前記FWD領域のトレンチピッチは前記IGBT領域のトレンチピッチより広くなっていることを特徴とする請求項1から9のいずれか1項に記載の半導体装置。
- 前記IGBT領域のうち、前記境界領域と接しているユニットセルでは、前記境界領域に接していないユニットセルと比べて、前記第2p型コンタクト領域の面積比率が小さいことを特徴とする請求項1から10のいずれか1項に記載の半導体装置。
- 前記IGBT領域のうち、前記境界領域と接しているユニットセルでは、前記境界領域に接していないユニットセルと比べて、前記第2p型コンタクト領域の面積比率が大きいことを特徴とする請求項1から10のいずれか1項に記載の半導体装置。
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JP6221974B2 (ja) * | 2014-07-14 | 2017-11-01 | トヨタ自動車株式会社 | 半導体装置 |
JP6261494B2 (ja) * | 2014-12-03 | 2018-01-17 | 三菱電機株式会社 | 電力用半導体装置 |
JP6659516B2 (ja) * | 2016-10-20 | 2020-03-04 | トヨタ自動車株式会社 | 半導体装置 |
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JP2020190383A (ja) | 2019-05-23 | 2020-11-26 | パナソニックIpマネジメント株式会社 | 熱交換器 |
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WO2013030943A1 (ja) | 2011-08-30 | 2013-03-07 | トヨタ自動車株式会社 | 半導体装置 |
JP2013197122A (ja) | 2012-03-15 | 2013-09-30 | Toshiba Corp | 半導体装置 |
WO2014125584A1 (ja) | 2013-02-13 | 2014-08-21 | トヨタ自動車株式会社 | 半導体装置 |
WO2015068203A1 (ja) | 2013-11-05 | 2015-05-14 | トヨタ自動車株式会社 | 半導体装置 |
JP2015165542A (ja) | 2014-03-03 | 2015-09-17 | トヨタ自動車株式会社 | 半導体装置を製造する方法及び半導体装置 |
JP2016072359A (ja) | 2014-09-29 | 2016-05-09 | トヨタ自動車株式会社 | 半導体装置 |
JP2016096222A (ja) | 2014-11-13 | 2016-05-26 | 三菱電機株式会社 | 半導体装置 |
JP2016100464A (ja) | 2014-11-21 | 2016-05-30 | 三菱電機株式会社 | 逆導通型半導体装置 |
WO2017141998A1 (ja) | 2016-02-15 | 2017-08-24 | 富士電機株式会社 | 半導体装置 |
JP2020072137A (ja) | 2018-10-30 | 2020-05-07 | 三菱電機株式会社 | 半導体装置 |
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