KR101631783B1 - 컨포멀한 금속 실리사이드 막들을 형성하는 방법 - Google Patents
컨포멀한 금속 실리사이드 막들을 형성하는 방법 Download PDFInfo
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- KR101631783B1 KR101631783B1 KR1020147023965A KR20147023965A KR101631783B1 KR 101631783 B1 KR101631783 B1 KR 101631783B1 KR 1020147023965 A KR1020147023965 A KR 1020147023965A KR 20147023965 A KR20147023965 A KR 20147023965A KR 101631783 B1 KR101631783 B1 KR 101631783B1
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 172
- 239000002184 metal Substances 0.000 title claims abstract description 166
- 238000000034 method Methods 0.000 title claims abstract description 107
- 229910021332 silicide Inorganic materials 0.000 title claims abstract description 65
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000000758 substrate Substances 0.000 claims abstract description 191
- 230000001603 reducing effect Effects 0.000 claims abstract description 44
- 230000008021 deposition Effects 0.000 claims abstract description 36
- 206010010144 Completed suicide Diseases 0.000 claims abstract description 27
- 239000002243 precursor Substances 0.000 claims abstract description 24
- -1 titanium halide Chemical class 0.000 claims description 45
- 238000000151 deposition Methods 0.000 claims description 41
- 239000010936 titanium Substances 0.000 claims description 28
- 229910052715 tantalum Inorganic materials 0.000 claims description 18
- 229910052719 titanium Inorganic materials 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 238000000137 annealing Methods 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000011733 molybdenum Substances 0.000 claims description 10
- 239000010937 tungsten Substances 0.000 claims description 10
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 9
- 229910021341 titanium silicide Inorganic materials 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 claims description 6
- 229910021344 molybdenum silicide Inorganic materials 0.000 claims description 6
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 claims description 6
- 229910021342 tungsten silicide Inorganic materials 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 3
- VKTGMGGBYBQLGR-UHFFFAOYSA-N [Si].[V].[V].[V] Chemical compound [Si].[V].[V].[V] VKTGMGGBYBQLGR-UHFFFAOYSA-N 0.000 claims 2
- 229910052756 noble gas Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 94
- 239000007789 gas Substances 0.000 description 86
- 239000000463 material Substances 0.000 description 28
- 239000011261 inert gas Substances 0.000 description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 12
- 238000012876 topography Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000006227 byproduct Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229910008484 TiSi Inorganic materials 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 5
- 229910016006 MoSi Inorganic materials 0.000 description 4
- 238000000231 atomic layer deposition Methods 0.000 description 4
- 229910001507 metal halide Inorganic materials 0.000 description 4
- 150000005309 metal halides Chemical class 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910003811 SiGeC Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- 229910004529 TaF 5 Inorganic materials 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Abstract
Description
도 2a 내지 도 2c는 본 발명의 일 실시예에 따라 기판 상에 금속 실리사이드 막을 형성하기 위한 프로세스 흐름의 개략적 단면도들을 도시한다.
도 3은 본 발명의 다른 실시예들에 따라 기판 상에 금속 실리사이드 막을 형성하는 방법의 흐름도이다.
도 4a 내지 도 4d는 본 발명의 다른 실시예들에 따라 기판 상에 금속 실리사이드 막을 형성하기 위한 프로세스 흐름의 개략적 단면도들을 도시한다.
도 5a 내지 도 5b는 본 발명의 다른 실시예에 따라 기판 상에 금속 실리사이드 막을 형성하기 위한 프로세스 흐름의 개략적 단면도들을 도시한다.
도 6은 본 발명의 다른 실시예에 따라 기판 상에 금속 실리사이드 막을 형성하기 위한 방법의 흐름도이다.
도 7a 내지 도 7d는 본 발명의 실시예에 따라 기판 상에 금속 실리사이드 막을 형성하기 위한 프로세스 흐름의 개략적 단면도들을 도시한다.
Claims (22)
- 기판 상에 금속 실리사이드 층을 형성하는 방법에 있어서,
a) 프로세스 챔버에 기판을 제공하는 단계;
b) 금속 전구체(metal precursor)를 포함하는 증착 가스로부터 생성된 플라즈마에 제 1 기판 온도로 상기 기판을 노출시키는 단계로서, 상기 플라즈마 노출은 자기-제한적 프로세스(self-limiting process)에서 상기 기판 상에 컨포멀한 금속-함유 층(conformal metal-containing layer)을 형성하는 것인, 상기 노출시키는 단계; 및
c) 플라즈마 없이 환원성 가스에 제 2 기판 온도로 금속-함유층을 노출시키는 단계를 포함하고,
상기 단계 b) 및 c)는 금속 실리사이드 층을 형성하기 위해 적어도 한번 교번적으로 수행되고, 상기 증착 가스는 상기 환원성 가스를 포함하지 않는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법. - 제 1 항에 있어서, 상기 금속 전구체는 티타늄 할로겐화물, 몰리브덴 할로겐화물, 텅스텐 할로겐화물, 탄탈륨 할로겐화물, 또는 바나듐 할로겐화물, 또는 이들 중 2개 이상의 혼합물을 포함하는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 1 항에 있어서, 상기 금속 실리사이드 층은 티타늄 실리사이드, 몰리브덴 실리사이드, 텅스텐 실리사이드, 탄탈륨 실리사이드, 또는 바나듐 실리사이드, 또는 이들 중 2개 이상의 혼합물을 포함하는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 1 항에 있어서, 상기 금속 실리사이드 층은 상기 기판에 형성되는 딥 트랜치(deep trench)의 표면들 위에 컨포멀하게(conformally) 증착되는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 4 항에 있어서, 상기 딥 트랜치는 50nm와 100nm 사이의 폭, 2000nm와 5000nm 사이의 깊이, 및 40:1과 100:1 사이의 종횡비를 갖는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 1 항에 있어서, 상기 금속 전구체는 티타늄 할로겐화물을 포함하고, 상기 환원성 가스는 H2를 포함하고, 상기 금속 실리사이드 층은 티타늄 실리사이드를 포함하는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 6 항에 있어서, 상기 제 1 및 제 2 기판 온도는 450℃와 650℃ 사이인 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 기판 상에 금속 실리사이드 막을 형성하는 방법에 있어서,
a) 프로세스 챔버에 기판을 제공하는 단계;
b) 금속 전구체(metal precursor)를 포함하는 증착 가스로부터 생성된 플라즈마에 제 1 기판 온도로 상기 기판을 노출시키는 단계로서, 상기 플라즈마 노출은 자기-제한적 프로세스(self-limiting process)에서 상기 기판 상에 컨포멀한 금속-함유 층(conformal metal-containing layer)을 증착하는 것인, 상기 노출시키는 단계;
c) 플라즈마 없이 환원성 가스에 제 2 기판 온도로 금속-함유층을 노출시키는 단계로서, 상기 단계 b) 및 c)는 상기 기판 상에 금속 막을 형성하기 위해 적어도 한번 교번적으로 수행되고, 상기 증착 가스는 상기 환원성 가스를 포함하지 않는 것인, 상기 노출시키는 단계; 및
d) 상기 금속 실리사이드 막을 형성하기 위해 제 3 기판 온도로 상기 기판을 어닐링하는 단계를 포함하고 상기 제 3 기판 온도는 상기 제 2 기판 온도보다 높은 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법. - 제 8 항에 있어서, 상기 단계 d)는, 상기 어닐링하는 단계 이전에 상기 금속 막 상에 실리콘을 증착하는 단계를 더 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 8 항에 있어서, 상기 증착 가스는 티타늄 할로겐화물, 몰리브덴 할로겐화물, 텅스텐 할로겐화물, 탄탈륨 할로겐화물, 또는 바나듐 할로겐화물, 또는 이들 중 2개 이상의 혼합물을 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 8 항에 있어서, 상기 금속 실리사이드 막은 티타늄 실리사이드, 몰리브덴 실리사이드, 텅스텐 실리사이드, 탄탈륨 실리사이드, 또는 바나듐 실리사이드, 또는 이들 중 2개 이상의 혼합물을 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 8 항에 있어서, 상기 금속 실리사이드 막은 상기 기판에 형성되는 딥 트랜치(deep trench)의 표면들 위에 컨포멀하게(conformally) 증착되는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 12 항에 있어서, 상기 딥 트랜치는 50nm와 100nm 사이의 폭, 2000nm와 5000nm 사이의 깊이, 및 40:1과 100:1 사이의 종횡비를 갖는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 8 항에 있어서, 상기 금속 전구체는 티타늄 할로겐화물을 포함하고, 상기 환원성 가스는 H2를 포함하고, 상기 금속 실리사이드 층은 티타늄 실리사이드를 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 14 항에 있어서, 상기 제 1 및 제 2 기판 온도는 450℃ 미만인 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 기판 상에 금속 실리사이드 막을 형성하는 방법에 있어서,
a) 프로세스 챔버에 기판을 제공하는 단계;
b) 플라즈마 없이 금속 전구체(metal precursor)를 포함하는 증착 가스에 제 1 기판 온도로 상기 기판을 열적으로 노출시키는 단계로서, 상기 열적 노출은 자기-제한적 프로세스(self-limiting process)에서 상기 기판 상에 컨포멀한 금속-함유 층(conformal metal-containing layer)을 형성하는 것인, 상기 노출시키는 단계;
c) 비활성 가스(noble gas)를 포함하는 플라즈마로의 노출에 의해 제 2 기판 온도로 금속-함유층을 개질시키는 단계; 및
d) 플라즈마 없이 환원성 가스에 제 2 기판 온도로 상기 개질된 금속-함유층을 노출시키는 단계를 포함하고, 상기 단계 b) 내지 d)는 상기 금속 실리사이드 막을 형성하기 위해 적어도 한번 순차적으로 그리고 교번적으로 수행되는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법. - 제 16 항에 있어서, 상기 증착 가스는 티타늄 할로겐화물, 몰리브덴 할로겐화물, 텅스텐 할로겐화물, 탄탈륨 할로겐화물, 또는 바나듐 할로겐화물, 또는 이들 중 2개 이상의 혼합물을 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 16 항에 있어서, 상기 금속 실리사이드 막은 티타늄 실리사이드, 몰리브덴 실리사이드, 텅스텐 실리사이드, 탄탈륨 실리사이드, 또는 바나듐 실리사이드, 또는 이들 중 2개 이상의 혼합물을 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 16 항에 있어서, 상기 금속 실리사이드 막은 상기 기판에 형성되는 딥 트랜치(deep trench)의 표면들 위에 컨포멀하게(conformally) 증착되는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 19 항에 있어서, 상기 딥 트랜치는 50nm와 100nm 사이의 폭, 2000nm와 5000nm 사이의 깊이, 및 40:1과 100:1 사이의 종횡비를 갖는 것인, 기판 상에 금속 실리사이드 층을 형성하는 방법.
- 제 16 항에 있어서, 상기 금속 전구체는 티타늄 할로겐화물을 포함하고, 상기 환원성 가스는 H2를 포함하고, 상기 금속 실리사이드 층은 티타늄 실리사이드를 포함하는 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
- 제 21 항에 있어서, 상기 제 1 및 제 2 기판 온도는 450℃와 650℃ 사이인 것인, 기판 상에 금속 실리사이드 막을 형성하는 방법.
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US13/427,343 US8785310B2 (en) | 2012-01-27 | 2012-03-22 | Method of forming conformal metal silicide films |
PCT/US2013/023303 WO2013112941A1 (en) | 2012-01-27 | 2013-01-25 | Method of forming conformal metal silicide films |
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US10204764B2 (en) * | 2014-10-28 | 2019-02-12 | Applied Materials, Inc. | Methods for forming a metal silicide interconnection nanowire structure |
WO2016111832A1 (en) * | 2015-01-09 | 2016-07-14 | Applied Materials, Inc. | Laminate and core shell formation of silicide nanowire |
US10199230B2 (en) * | 2015-05-01 | 2019-02-05 | Applied Materials, Inc. | Methods for selective deposition of metal silicides via atomic layer deposition cycles |
US9972504B2 (en) * | 2015-08-07 | 2018-05-15 | Lam Research Corporation | Atomic layer etching of tungsten for enhanced tungsten deposition fill |
KR102441431B1 (ko) * | 2016-06-06 | 2022-09-06 | 어플라이드 머티어리얼스, 인코포레이티드 | 표면을 갖는 기판을 프로세싱 챔버에 포지셔닝하는 단계를 포함하는 프로세싱 방법 |
US10573522B2 (en) * | 2016-08-16 | 2020-02-25 | Lam Research Corporation | Method for preventing line bending during metal fill process |
US10535527B2 (en) * | 2017-07-13 | 2020-01-14 | Applied Materials, Inc. | Methods for depositing semiconductor films |
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WO2020191068A1 (en) * | 2019-03-20 | 2020-09-24 | Tokyo Electron Limited | Method of selectively forming metal silicides for semiconductor devices |
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US20230115130A1 (en) * | 2021-10-13 | 2023-04-13 | Applied Materials, Inc. | Methods for preparing metal silicides |
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