KR101012713B1 - 고전압 실리콘 카바이드 반도체 디바이스를 위한 환경변화에 강한 패시베이션 구조 - Google Patents
고전압 실리콘 카바이드 반도체 디바이스를 위한 환경변화에 강한 패시베이션 구조 Download PDFInfo
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- KR101012713B1 KR101012713B1 KR1020087016786A KR20087016786A KR101012713B1 KR 101012713 B1 KR101012713 B1 KR 101012713B1 KR 1020087016786 A KR1020087016786 A KR 1020087016786A KR 20087016786 A KR20087016786 A KR 20087016786A KR 101012713 B1 KR101012713 B1 KR 101012713B1
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- silicon nitride
- silicon carbide
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 26
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 68
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 67
- 238000002161 passivation Methods 0.000 title claims description 53
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 49
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 38
- 239000001257 hydrogen Substances 0.000 claims description 29
- 229910052739 hydrogen Inorganic materials 0.000 claims description 29
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 23
- 239000000758 substrate Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 8
- 230000003071 parasitic effect Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 230000005669 field effect Effects 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000010348 incorporation Methods 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract 3
- 230000005684 electric field Effects 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 235000012431 wafers Nutrition 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
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- 230000008018 melting Effects 0.000 description 1
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Abstract
Description
Claims (36)
- 패시베이션된 반도체 구조로서,고전계에 동작하는 실리콘 카바이드계 디바이스;상기 디바이스 내의 활성 영역; 및상기 활성 영역을 위한 에지 종단 패시베이션을 포함하고,상기 에지 종단 패시베이션은,표면 상태를 충족시키고 계면 밀도를 낮추기 위한, 상기 디바이스의 실리콘 카바이드 부분들 중 적어도 일부 상의 옥사이드층,수소가 포함되는 것(incorporation)를 방지하고, 기생 커패시턴스(parasitic capacitance)를 감소시키며, 트래핑(trapping)을 최소화하기 위한, 상기 옥사이드층 상의 실리콘 나이트라이드의 비화학량적인 층(non-stoichiometric layer), 및상기 비화학량적인 층 및 상기 옥사이드층을 캡슐화하기 위한, 상기 비화학량적인 층 상의 실리콘 나이트라이드의 화학량적인 층(stoichiometric layer)을 포함하는,패시베이션된 반도체 구조.
- 제1항에 있어서,상기 실리콘 카바이드 부분들은 단결정이며, 3C, 4H, 6H, 및 15R 폴리 타입의 실리콘 카바이드로 이루어진 군으로부터 선택된 폴리 타입을 가지는, 패시베이션된 반도체 구조.
- 제1항에 있어서,상기 디바이스는, 쇼트키 다이오드, 금속 산화물 반도체 전계 효과 트랜지스터(MOSFET), 절연 게이트 바이폴러 트랜지스터(IGBT), PIN 다이오드, 바이폴러 접합 트랜지스터(BJT), 및 사이리스터로 이루어진 군으로부터 선택되는,패시베이션된 반도체 구조.
- 제3항에 있어서,상기 디바이스는 쇼트키 다이오드이고,상기 활성 영역은,상기 실리콘 카바이드 에피택셜층 상의 쇼트키 금속; 및상기 에피택셜층을 지지하는 실리콘 카바이드 기판을 포함하는,패시베이션된 반도체 구조.
- 제4항에 있어서,상기 실리콘 카바이드 에피택셜층 및 상기 실리콘 카바이드 기판은 모두 n형이고,상기 쇼트키 금속은 니켈, 크롬, 티타늄, 및 백금으로 이루어지는 군에서 선택되는, 패시베이션된 반도체 구조.
- 제3항에 있어서,상기 디바이스는 소스 콘택트, 게이트 콘택트 및 드레인 콘택트를 각각 포함하는 MOSFET이며,상기 에지 종단 패시베이션은 상기 콘택트들 중 적어도 하나에 인접하여 있는,패시베이션된 반도체 구조.
- 제6항에 있어서,상기 MOSFET은 p채널 MOSFET인 것을 특징으로 하는, 패시베이션된 반도체 구조.
- 제6항에 있어서,상기 MOSFET은 n채널 MOSFET인 것을 특징으로 하는, 패시베이션된 반도체 구조.
- 제3항에 있어서,상기 디바이스는 베이스 콘택트, 이미터 콘택트, 및 콜렉터 콘택트를 각각 포함하는 바이폴러 접합 트랜지스터이고,상기 에지 종단 패시 베이션은 상기 콘택트들 중 적어도 하나에 인접하여 있는,패시베이션된 반도체 구조.
- 제9항에 있어서,상기 바이폴러 접합 트랜지스터는 npn 바이폴러 접합 트랜지스터인 것을 특징으로 하는, 패시베이션된 반도체 구조.
- 제9항에 있어서,상기 바이폴러 접합 트랜지스터는 pnp 바이폴러 접합 트랜지스터인 것을 특징으로 하는, 패시베이션된 반도체 구조.
- 제3항에 있어서,상기 디바이스는 베이스 콘택트, 이미터 콘택트, 및 콜렉터 콘택트를 각각 포함하는 절연 게이트 바이폴러 트랜지스터이고,상기 에지 종단 패시 베이션은 상기 콘택트들 중 적어도 하나에 인접하여 있는,패시베이션된 반도체 구조.
- 제12항에 있어서,상기 절연 게이트 바이폴러 트랜지스터는 n형 드리프트 영역을 포함하는 것을 특징으로 하는, 패시베이션된 반도체 구조.
- 제12항에 있어서,상기 절연 게이트 바이폴러 트랜지스터는 p형 드리프트 영역을 포함하는 것을 특징으로 하는, 패시베이션된 반도체 구조.
- 제3항에 있어서,상기 디바이스는 애노드 콘택트, 캐소드 콘택트, 및 게이트 콘택트를 각각 포함하는 사이리스터이고,상기 에지 종단 패시 베이션은 상기 콘택트들 중 적어도 하나에 인접하여 있는,패시베이션된 반도체 구조.
- 제3항에 있어서,상기 디바이스는 애노드 콘택트 및 캐소드 콘택트를 각각 포함하는 PIN 다이오드로서,상기 에지 종단 패시 베이션은 상기 콘택트들 중 적어도 하나에 인접하여 있는,패시베이션된 반도체 구조.
- 제1항에 있어서,상기 옥사이드층은 열산화층인, 패시베이션된 반도체 구조.
- 제17항에 있어서,상기 열산화층은 100 내지 500 옹스트롬의 두께를 가지는 실리콘 다이옥사이드인, 패시베이션된 반도체 구조.
- 제1항에 있어서,상기 실리콘 나이트라이드의 비화학량적인 층은 실질적으로 수소가 존재하지 않는, 패시베이션된 반도체 구조.
- 제1항에 있어서,상기 실리콘 나이트라이드의 비화학량적인 층의 두께는 1000 내지 2000 옹스트롬인, 패시베이션된 반도체 구조.
- 제1항에 있어서,상기 실리콘 나이트라이드의 비화학량적인 층은 1.85 내지 1.95의 굴절률을 가지는, 패시베이션된 반도체 구조.
- 제1항에 있어서,상기 실리콘 나이트라이드의 화학량적인 층은 실질적으로 수소가 존재하지 않는, 패시베이션된 반도체 구조.
- 패시베이션된 반도체 구조로서,고전계에 동작하는 실리콘 카바이드계 디바이스;기판을 포함하는 상기 디바이스 내의 활성 영역; 및상기 활성 영역을 위한 에지 종단 패시베이션을 포함하고,상기 에지 종단 패시베이션은,상기 활성 영역에 인접하는 상기 실리콘 카바이드 부분 상에 형성되고, 실리콘 카바이드 부분과의 사이에서 계면 밀도를 낮추기 위한, 산화층(oxidation layer),기생 커패시턴스를 감소시키고, 디바이스 트래핑을 최소화하기 위한, 상기 산화층 상에 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제1 층,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제1 층 상에, 상기 구조를 캡슐화하지 않으면서 또한 상기 기판에 의거하여 다음의 패시베이션층들의 위치 설정을 위한, 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제2 층,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제2 층 상에, 상기 구조를 캡슐화하고 상기 패시베이션층들의 수소 장벽 특성(hydrogen barrier property)을 강화하기 위한, 스퍼터링된 화학량적인 실리콘 나이트라이드층, 및상기 구조를 캡슐화하는 상기 스퍼터링된 화학량적인 실리콘 나이트라이드층 상에, 스텝 커버리지(step coverage) 및 균열 방지를 위한, 화학 기상 증착된 화학량적인 실리콘 나이트라이드의 주위 장벽층(environmental barrier layer)을 포함하는,패시베이션된 반도체 구조.
- 제23항에 있어서,상기 산화층은 열산화층인, 패시베이션된 반도체 구조.
- 제24항에 있어서,상기 열산화층은 100 내지 500 옹스트롬의 두께를 가지는 실리콘 다이옥사이드인, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제1 층은 실질적으로 수소가 존재하지 않는, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제1 층의 두께는 1000 내지 2000 옹스트롬인, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제1 층은 1.85 내지 1.95의 굴절률을 가지는, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제2 층은 실질적으로 수소가 존재하지 않는, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제2 층의 두께는 1000 내지 3000 옹스트롬인, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 스퍼터링된 비화학량적인 실리콘 나이트라이드의 제2 층은 1.85 내지 1.95의 굴절률을 가지는, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 구조를 캡슐화하는 상기 스퍼터링된 화학량적인 실리콘 나이트라이드층의 두께는, 1000 내지 3000 옹스트롬인, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 구조를 캡슐화하는 상기 스퍼터링된 화학량적인 실리콘 나이트라이드층은 실질적으로 수소가 존재하지 않는, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 주위 장벽층은 2000 내지 5000 옹스트롬인, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 주위 장벽층 및 상기 구조를 캡슐화하는 상기 스퍼터링된 화학량적인 실리콘 나이트라이드층은 모두 Si3N4를 포함하는, 패시베이션된 반도체 구조.
- 제23항에 있어서,상기 실리콘 카바이드 부분은 단결정이며, 3C, 4H, 6H, 및 15R 폴리 타입의 실리콘 카바이드로 이루어진 군으로부터 선택되는 것을 특징으로 하는, 패시베이션된 반도체 구조.
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JP5254037B2 (ja) | 2013-08-07 |
EP1972013B1 (en) | 2010-06-09 |
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WO2007081528A3 (en) | 2007-09-20 |
CN101356649B (zh) | 2010-04-14 |
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US7696584B2 (en) | 2010-04-13 |
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US7598576B2 (en) | 2009-10-06 |
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ATE470955T1 (de) | 2010-06-15 |
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US20070018272A1 (en) | 2007-01-25 |
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