JP7374054B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7374054B2 JP7374054B2 JP2020139105A JP2020139105A JP7374054B2 JP 7374054 B2 JP7374054 B2 JP 7374054B2 JP 2020139105 A JP2020139105 A JP 2020139105A JP 2020139105 A JP2020139105 A JP 2020139105A JP 7374054 B2 JP7374054 B2 JP 7374054B2
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- 239000004065 semiconductor Substances 0.000 title claims description 78
- 239000012535 impurity Substances 0.000 claims description 81
- 239000000758 substrate Substances 0.000 claims description 41
- 230000015556 catabolic process Effects 0.000 claims description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims description 10
- 239000011574 phosphorus Substances 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 250
- 238000010586 diagram Methods 0.000 description 16
- 238000004088 simulation Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 230000010355 oscillation Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000002513 implantation Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000005224 laser annealing Methods 0.000 description 2
- -1 phosphorus ions Chemical class 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
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Description
図1は、実施の形態1に係る半導体装置であるIGBTの主要部の断面図である。本実施の形態では、IGBTの例として、1200V耐圧クラスのIGBTを示す。また、以下は、第1導電型をN型とし、第2導電型をP型として説明を行う。
(a)耐圧750V以下であり、N型ドリフト層1の比抵抗が20Ω・cm以上40Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が50μm以上80μm以下
(b)耐圧1200Vであり、N型ドリフト層1の比抵抗が50Ω・cm以上90Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が100μm以上130μm以下
(c)耐圧1700Vであり、N型ドリフト層1の比抵抗が90Ω・cm以上130Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が170μm以上210μm以下
(d)耐圧2000Vであり、N型ドリフト層1の比抵抗が130Ω・cm以上180Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が200μm以上260μm以下
(e)耐圧3300Vであり、N型ドリフト層1の比抵抗が200Ω・cm以上350Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が340μm以上420μm以下
(f)耐圧4500Vであり、N型ドリフト層1の比抵抗が300Ω・cm以上450Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が420μm以上540μm以下
(g)耐圧6500Vであり、N型ドリフト層1の比抵抗が600Ω・cm以上900Ω・cm以下、且つ、N型ドリフト層1の厚みとN型バッファ層10の厚みとの合計が580μm以上720μm以下
なお、N型バッファ層10の厚みは、第1バッファ層101、第2バッファ層102、第3バッファ層103および第4バッファ層104の各厚みの合計である。
実施の形態1では、半導体装置の例としてIGBTを示したが、実施の形態2では、半導体装置としてダイオードを用いる。図19は、実施の形態2に係る半導体装置であるダイオードの主要部の断面図である。
Claims (12)
- 半導体基板の第1主面と第2主面との間に設けられた第1導電型のドリフト層と、
前記ドリフト層と前記第1主面との間に設けられ、前記ドリフト層よりも不純物ピーク濃度が高い第1導電型のバッファ層と、
を備え、
前記バッファ層は、前記第1主面側から、第1バッファ層、第2バッファ層、第3バッファ層および第4バッファ層がこの順に配置された構造を有し、
前記第1バッファ層の不純物ピーク位置と前記第2バッファ層の不純物ピーク位置との間の距離をL12、前記第2バッファ層の不純物ピーク位置と前記第3バッファ層の不純物ピーク位置との間の距離をL23とすると、L23/L12≧3.5の関係が満たされている、
半導体装置。 - 前記第1バッファ層を構成する不純物はリンであり、
前記第2バッファ層、前記第3バッファ層および前記第4バッファ層を構成する不純物はプロトンである、
請求項1に記載の半導体装置。 - 前記第2バッファ層の不純物ピーク濃度をC2、前記第3バッファ層の不純物ピーク濃度をC3、前記第4バッファ層の不純物ピーク濃度をC4とすると、C2>C3>C4の関係が満たされている、
請求項1または請求項2に記載の半導体装置。 - 前記第2バッファ層、前記第3バッファ層および前記第4バッファ層の不純物ピーク濃度は、2.0×1015/cm3以下である
請求項1から請求項3のいずれか一項に記載の半導体装置。 - 前記第3バッファ層の不純物ピーク位置と前記第4バッファ層の不純物ピーク位置との間の距離をL34とすると、L23/L34>1の関係が満たされている、
請求項1から請求項4のいずれか一項に記載の半導体装置。 - 耐圧750V以下であり、前記ドリフト層の比抵抗が20Ω・cm以上40Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が50μm以上80μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 耐圧1200Vであり、前記ドリフト層の比抵抗が50Ω・cm以上90Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が100μm以上130μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 耐圧1700Vであり、前記ドリフト層の比抵抗が90Ω・cm以上130Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が170μm以上210μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 耐圧2000Vであり、前記ドリフト層の比抵抗が130Ω・cm以上180Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が200μm以上260μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 耐圧3300Vであり、前記ドリフト層の比抵抗が200Ω・cm以上350Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が340μm以上420μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 耐圧4500Vであり、前記ドリフト層の比抵抗が300Ω・cm以上450Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が420μm以上540μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。 - 耐圧6500Vであり、前記ドリフト層の比抵抗が600Ω・cm以上900Ω・cm以下、且つ、前記ドリフト層の厚みと前記バッファ層の厚みとの合計が580μm以上720μm以下である、
請求項1から請求項5のいずれか一項に記載の半導体装置。
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US17/336,012 US11545564B2 (en) | 2020-08-20 | 2021-06-01 | Semiconductor device |
DE102021119689.2A DE102021119689B4 (de) | 2020-08-20 | 2021-07-29 | Halbleitervorrichtung |
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JP2014099643A (ja) | 2009-11-02 | 2014-05-29 | Fuji Electric Co Ltd | 半導体装置 |
WO2016120999A1 (ja) | 2015-01-27 | 2016-08-04 | 三菱電機株式会社 | 半導体装置 |
JP2019096897A (ja) | 2015-06-17 | 2019-06-20 | 富士電機株式会社 | 半導体装置 |
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JP6508099B2 (ja) * | 2016-03-18 | 2019-05-08 | 三菱電機株式会社 | 半導体素子 |
EP3240040A1 (en) * | 2016-04-26 | 2017-11-01 | ABB Schweiz AG | Insulated gate bipolar transistor and method for manufacturing such an insulated gate bipolar transistor |
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JP2019096897A (ja) | 2015-06-17 | 2019-06-20 | 富士電機株式会社 | 半導体装置 |
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