KR101047947B1 - 트렌치 금속 산화물 반도체 - Google Patents
트렌치 금속 산화물 반도체 Download PDFInfo
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- KR101047947B1 KR101047947B1 KR1020080036192A KR20080036192A KR101047947B1 KR 101047947 B1 KR101047947 B1 KR 101047947B1 KR 1020080036192 A KR1020080036192 A KR 1020080036192A KR 20080036192 A KR20080036192 A KR 20080036192A KR 101047947 B1 KR101047947 B1 KR 101047947B1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 58
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 18
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 82
- 239000002184 metal Substances 0.000 claims abstract description 82
- IYYIVELXUANFED-UHFFFAOYSA-N bromo(trimethyl)silane Chemical compound C[Si](C)(C)Br IYYIVELXUANFED-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 58
- 229920005591 polysilicon Polymers 0.000 claims abstract description 58
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- 230000004888 barrier function Effects 0.000 claims abstract description 10
- 230000005669 field effect Effects 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims description 54
- 239000000758 substrate Substances 0.000 claims description 45
- 239000007943 implant Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 31
- 239000011810 insulating material Substances 0.000 claims description 22
- 238000005530 etching Methods 0.000 claims description 14
- 239000005380 borophosphosilicate glass Substances 0.000 claims description 13
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 6
- 230000008021 deposition Effects 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 238000005389 semiconductor device fabrication Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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Abstract
Description
Claims (22)
- 트렌치 금속 산화물 반도체(MOS) 배리어 쇼트키(TMBS) 장치를 포함하는 반도체 장치에 있어서, 상기 TMBS 장치는,도전성 재료가 제1 트렌치들에 퇴적되어 있는, 복수의 제1 트렌치가 형성된 기판;상기 제1 트렌치들 사이의 영역들을 구비하는 액티브 영역, 및상기 영역들 위 및 상기 제1 트렌치들 위에 형성된 소스 메탈층을 구비하고, 상기 액티브 영역 내에, 상기 소스 메탈층이 상기 기판과 전기적으로 접촉하나 상기 제1 트렌치 내에 배치된 상기 도전성 재료와는 절연되며, 상기 제1 트렌치 내의 상기 도전성 재료는 상기 TMBS 장치의 액티브 영역의 외측에 있는 콘택트에 전기적으로 결합되어 있는 반도체 장치.
- 제1항에 있어서, 상기 액티브 영역은 상기 제1 트렌치들간에 형성된 복수의 메사를 포함하고, 상기 메사들은 제1 높이의 사이드월을 갖고, 상기 도전성 재료는 상기 제1 높이보다 낮은 제2 높이로 상기 제1 트렌치들을 충전하는, 반도체 장치.
- 제2항에 있어서, 상기 도전성 재료는 상기 메사 너머의 거리를 상기 기판을 통해 연장되고, 상기 도전성 재료는 상기 콘택트 및 상기 TMBS 장치의 상기 액티브 영역 외측에 연장되는, 반도체 장치.
- 제1항에 있어서, 상기 기판으로부터 또한 상기 소스 메탈층으로부터 상기 도전성 재료를 분리하는 절연 재료를 더 포함하는, 반도체 장치.
- 제4항에 있어서, 상기 절연 재료는 게이트 산화물을 포함하는, 반도체 장치.
- 제1항에 있어서, 상기 기판은 p형 실리콘 기판을 포함하고 상기 도전성 재료는 폴리실리콘을 포함하는, 반도체 장치.
- 제1항에 있어서, 상기 소스 메탈층은 티타늄 질화물, 티타늄, 및 알루미늄으로 구성되는 그룹으로부터 선택된 재료를 포함하는, 반도체 장치.
- 제1항에 있어서, 금속 산화물 반도체 전계 효과 트랜지스터(MOSFET)를 더 포함하고, 상기 MOSFET 및 상기 TMBS 장치는 조합되어 모놀리틱으로 집적된 구조를 포함하는, 반도체 장치.
- 제8항에 있어서, 상기 MOSFET는,상기 기판 내에 형성되고 또한 그에 상기 도전성 재료가 배치된 복수의 제2 트렌치; 및상기 제2 트렌치의 각각에 인접하나 상기 절연 재료에 의해 상기 제2 트렌치들에 있어서 상기 도전성 재료로부터 분리되어 있는 소스 임플란트를 포함하고,상기 MOSFET는, 상기 소스 메탈층이 상기 제2 트렌치 상에 배치되어 있고 또한 상기 제2 트렌치들 간의 상기 기판에 형성된 p-보디 임플란트와 전기적으로 접촉하고 있는 액티브 영역을 갖고, 상기 제1 트렌치들의 도전성 재료와 게이트 메탈 간의 전기적 콘택트는 상기 MOSFET의 액티브 영역의 외측에서 이루어지는, 반도체 장치.
- 트렌치 금속 산화물 반도체(MOS) 배리어 쇼트키(TMBS) 장치를 포함하는 반도체 장치의 제조 방법에 있어서, 상기 방법은,기판에 복수의 제1 트렌치를 형성하되, 상기 제1 트렌치들이 메사에 의해 분리되고, 상기 제1 트렌치들이 제1 높이의 사이드월을 갖고;상기 제1 높이보다 낮은 높이로 상기 제1 트렌치 내에 도전성 재료를 퇴적하고;상기 도전성 재료 상에 절연 재료의 층을 형성하고;상기 제1 트렌치와 상기 메사들을 둘러싸는 제1 영역 상에 소스 메탈층을 형성하되, 상기 제1 영역 내에, 상기 소스 메탈층이 상기 절연 재료에 의해 상기 제1 트렌치 내측의 상기 도전성 재료로부터 분리되고 상기 소스 메탈층은 상기 메사와 접촉하고;상기 제1 트렌치들에 있어서의 상기 도전성 재료와 상기 소스 메탈층 간에 제1 전기적 콘택트를 형성하되, 상기 제1 전기적 콘택트가 상기 제1 영역의 외측에 있는, 반도체 장치의 제조 방법.
- 제10항에 있어서, 상기 소스 메탈층의 형성에 앞서,상기 메사 및 상기 제1 트렌치들 상에 유전체층을 형성하고;상기 유전체층의 부분들을 에칭하고 상기 메사들을 노출시켜, 상기 소스 메탈층이 이어서 형성될 때 상기 소스 메탈층이 상기 메사와 접촉하도록 하고, 상기 절연 재료는 상기 에칭이 행해진 후 상기 도전성 재료 상에 잔류하는, 반도체 장치의 제조 방법.
- 제11항에 있어서, 상기 유전체층이, TEOS(tetraethylorthosilicate)의 층 및 BPSG(borophosphosilicate glass)의 층을 포함하는 유전체 스택을 포함하는, 반도체 장치의 제조 방법.
- 제10항에 있어서, 상기 절연 재료는 게이트 산화물을 포함하고, 상기 기판은 p형 실리콘 기판을 포함하고, 상기 도전성 재료는 폴리실리콘을 포함하고, 상기 소스 메탈층은 티타늄 질화물, 티타늄 및 알루미늄으로 구성되는 그룹으로부터 선택된 재료를 포함하는, 반도체 장치의 제조 방법.
- 제10항에 있어서, 상기 기판 상에 형성된 금속 산화물 반도체 전계 효과 트랜지스터(MOSFET)를 더 포함하고, 상기 MOSFET 및 상기 TMBS 장치는 조합되어 모놀리틱으로 집적된 구조를 포함하는, 반도체 장치의 제조 방법.
- 제14항에 있어서,제2 트렌치들 내에도 상기 도전성 재료가 퇴적되는, 상기 기판 내에 복수의 제2 트렌치를 형성하고;상기 제2 트렌치들 간에 p-보디 임플란트를 형성하되, 상기 제2 트렌치 및 상기 p-보디 임플란트를 포함하는 제2 영역 상에 상기 소스 메탈층이 배치되고;상기 제2 트렌치들의 각각에 인접하나 상기 절연 재료에 의해 상기 제2 트렌치들에 있어서 상기 도전성 재료로부터 분리되는 소스 임플란트를 형성하고,상기 제2 트렌치들에 있어서의 상기 도전성 재료와 게이트 메탈 간에 제2 전기적 콘택트를 형성하되, 상기 제2 전기적 콘택트는 상기 제2 영역의 외측에 있는, 반도체 장치의 제조 방법.
- 트렌치 금속 산화물 반도체(MOS) 배리어 쇼트키(TMBS) 장치를 포함하는 반도체 장치에 있어서, 상기 TMBS 장치는,제1 높이의 사이드월을 갖는 복수의 메사가 형성된 기판;상기 메사들 간에 위치된 복수의 제1 트렌치 내에 배치되고, 상기 제1 높이보다 낮은 제2 높이로 상기 제1 트렌치들을 충전하는 도전성 재료; 및상기 제1 트렌치 내측의 도전성 재료를 상기 기판으로부터 또한 상기 메사들 및 상기 제1 트렌치 상에 배치된 소스 메탈층으로부터 분리시키는 절연 재료를 포함하고, 상기 소스 메탈층은 상기 TMBS 장치의 액티브 영역 내에 상기 메사들과 전기적으로 접촉하고, 상기 액티브 영역은 상기 제1 트렌치들 간의 영역들을 포함하고, 상기 제1 트렌치의 상기 도전성 재료와 상기 소스 메탈층 간의 전기적 콘택트가 상기 TMBS 장치의 액티브 영역의 외측에서 이루어지는 반도체 장치.
- 제16항에 있어서, 상기 절연 재료는 게이트 산화물을 포함하고, 상기 기판은 p형 실리콘 기판을 포함하고, 상기 도전성 재료는 폴리실리콘을 포함하고, 상기 소스 메탈층은 티타늄 질화물, 티타늄 및 알루미늄으로 구성되는 그룹으로부터 선택된 재료를 포함하는, 반도체 장치.
- 제16항에 있어서, 상기 기판 상에 형성된 금속 산화물 반도체 전계 효과 트랜지스터(MOSFET)를 더 포함하고, 상기 MOSFET 및 상기 TMBS 장치는 조합되어 모놀리틱으로 집적된 구조를 포함하는, 반도체 장치.
- 제18항에 있어서, 상기 MOSFET는, 상기 기판 내에 형성되고 또한 그에 상기 도전성 재료가 배치된 복수의 제2 트렌치를 포함하고; 상기 MOSFET의 액티브 영역 내에, 상기 제2 트렌치 상에 또한 상기 제2 트렌치들간의 상기 기판에 형성된 p-보디 임플란트 상에 상기 소스 메탈층이 배치되어 있고, 상기 제2 트렌치들의 도전성 재료와 게이트 메탈간의 전기적 콘택트는 상기 MOSFET의 액티브 영역의 외측에서 이루어지고, 상기 소스 메탈층은 상기 p-보디 임플란트와 전기적으로 접촉하나 상기 제2 트렌치들의 도전성 재료와는 전기적으로 접촉하지 않는, 반도체 장치.
- 제19항에 있어서, 상기 제2 트렌치들의 각각에 인접하지만 상기 절연 재료에 의해 상기 제2 트렌치들의 도전성 재료로부터 분리되는 소스 임플란트를 더 포함하는, 반도체 장치.
- 제19항에 있어서, 상기 제2 트렌치들 상에 배치되나 소스 메탈층과 상기 p-보디 임플란트 간에 전기적 콘택트를 허용하는 갭에 의해 분리되는 유전체층을 더 포함하는, 반도체 장치.
- 제21항에 있어서, 상기 유전체층은, TEOS(tetraethylorthosilicate)의 층 및 BPSG(borophosphosilicate glass)의 층을 포함하는 유전체 스택을 포함하는, 반도체 장치.
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US12/098,950 US8368126B2 (en) | 2007-04-19 | 2008-04-07 | Trench metal oxide semiconductor with recessed trench material and remote contacts |
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JP2006012967A (ja) * | 2004-06-23 | 2006-01-12 | Toshiba Corp | 半導体装置 |
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US8883580B2 (en) | 2014-11-11 |
EP1983576A3 (en) | 2009-09-23 |
KR20080094617A (ko) | 2008-10-23 |
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US20140235023A1 (en) | 2014-08-21 |
JP5197122B2 (ja) | 2013-05-15 |
TWI389312B (zh) | 2013-03-11 |
CN101295712A (zh) | 2008-10-29 |
CN101295712B (zh) | 2012-06-06 |
TW200901469A (en) | 2009-01-01 |
US8368126B2 (en) | 2013-02-05 |
MY147107A (en) | 2012-10-31 |
JP2008270811A (ja) | 2008-11-06 |
US20080258212A1 (en) | 2008-10-23 |
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