KR100623177B1 - 높은 유전율을 갖는 유전체 구조물, 이의 제조 방법, 이를포함하는 불휘발성 반도체 메모리 장치 및 그 제조 방법 - Google Patents
높은 유전율을 갖는 유전체 구조물, 이의 제조 방법, 이를포함하는 불휘발성 반도체 메모리 장치 및 그 제조 방법 Download PDFInfo
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- KR100623177B1 KR100623177B1 KR1020050006547A KR20050006547A KR100623177B1 KR 100623177 B1 KR100623177 B1 KR 100623177B1 KR 1020050006547 A KR1020050006547 A KR 1020050006547A KR 20050006547 A KR20050006547 A KR 20050006547A KR 100623177 B1 KR100623177 B1 KR 100623177B1
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- dielectric layer
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- dielectric structure
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000004065 semiconductor Substances 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 239000002184 metal Substances 0.000 claims abstract description 49
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 38
- 239000010703 silicon Substances 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 29
- 238000005530 etching Methods 0.000 claims description 15
- 150000003624 transition metals Chemical class 0.000 claims description 14
- 229910052723 transition metal Inorganic materials 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 238000005229 chemical vapour deposition Methods 0.000 claims description 10
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 10
- 229920005591 polysilicon Polymers 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910021332 silicide Inorganic materials 0.000 claims description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 5
- 238000000231 atomic layer deposition Methods 0.000 claims description 4
- 229910052735 hafnium Inorganic materials 0.000 claims description 4
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- 238000004549 pulsed laser deposition Methods 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000005240 physical vapour deposition Methods 0.000 claims description 3
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052706 scandium Inorganic materials 0.000 claims description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 167
- ILCYGSITMBHYNK-UHFFFAOYSA-N [Si]=O.[Hf] Chemical compound [Si]=O.[Hf] ILCYGSITMBHYNK-UHFFFAOYSA-N 0.000 description 25
- 229920002120 photoresistant polymer Polymers 0.000 description 19
- CEPICIBPGDWCRU-UHFFFAOYSA-N [Si].[Hf] Chemical compound [Si].[Hf] CEPICIBPGDWCRU-UHFFFAOYSA-N 0.000 description 13
- 238000002955 isolation Methods 0.000 description 12
- 239000002356 single layer Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910021480 group 4 element Inorganic materials 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000004380 ashing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 2
- -1 scandium (Sc) Chemical class 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910019001 CoSi Inorganic materials 0.000 description 1
- 229910008484 TiSi Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- TVGGZXXPVMJCCL-UHFFFAOYSA-N [Si].[La] Chemical compound [Si].[La] TVGGZXXPVMJCCL-UHFFFAOYSA-N 0.000 description 1
- NVZBIFPUMFLZLM-UHFFFAOYSA-N [Si].[Y] Chemical compound [Si].[Y] NVZBIFPUMFLZLM-UHFFFAOYSA-N 0.000 description 1
- CPOIJYXGUPKOCR-UHFFFAOYSA-N [Si][Sc] Chemical compound [Si][Sc] CPOIJYXGUPKOCR-UHFFFAOYSA-N 0.000 description 1
- MANBDHUBXBMZNV-UHFFFAOYSA-N [V]=[Si] Chemical compound [V]=[Si] MANBDHUBXBMZNV-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- LIZIAPBBPRPPLV-UHFFFAOYSA-N niobium silicon Chemical compound [Si].[Nb] LIZIAPBBPRPPLV-UHFFFAOYSA-N 0.000 description 1
- HEHINIICWNIGNO-UHFFFAOYSA-N oxosilicon;titanium Chemical compound [Ti].[Si]=O HEHINIICWNIGNO-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- HWEYZGSCHQNNEH-UHFFFAOYSA-N silicon tantalum Chemical compound [Si].[Ta] HWEYZGSCHQNNEH-UHFFFAOYSA-N 0.000 description 1
- UVGLBOPDEUYYCS-UHFFFAOYSA-N silicon zirconium Chemical compound [Si].[Zr] UVGLBOPDEUYYCS-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910021341 titanium silicide Inorganic materials 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/3141—Deposition using atomic layer deposition techniques [ALD]
Abstract
Description
Claims (25)
- 적어도 하나의 금속 실리콘 산화물로 이루어진 제1 유전층 패턴; 및적어도 하나의 금속 실리콘 산질화물로 이루어진 제2 유전층 패턴을 포함하는 유전체 구조물.
- 제 1 항에 있어서, 상기 금속 실리콘 산화물은 하기 화학식 (1)의 조성을 갖는 것을 특징으로 하는 유전체 구조물.MXSiYO2 ㆍㆍㆍㆍㆍㆍㆍㆍㆍㆍㆍㆍ(1)(여기서, M은 금속 원소를 나타내고, 0≤X≤1이며, 0≤Y≤1이고, X+Y=1이다.)
- 제 2 항에 있어서, 상기 금속 실리콘 산질화물은 하기 화학식 (2)의 조성을 갖는 것을 특징으로 하는 유전체 구조물.MXSiYO2-ZNZㆍㆍㆍㆍㆍㆍㆍㆍㆍㆍㆍㆍ(2)(여기서, 0≤Z≤1이다.)
- 제 3 항에 있어서, 상기 유전체 구조물은 상기 금속 실리콘 산화물 및 상기 금속 실리콘 산질화물이 교대로 반복적으로 적층되어 각각 N개로 형성된 것을 특징으로 하는 유전체 구조물.(여기서, N은 양의 정수이다.)
- 제 1 항에 있어서, 상기 제2 유전층 패턴은 상기 제1 유전층 패턴으로부터 생성되는 것을 특징으로 하는 유전체 구조물.
- 제 1 항에 있어서, 상기 금속 실리콘 산화물은 IV족 전이 금속의 실리콘 산화물, V족 전이 금속의 실리콘 산화물 및 희토류 금속의 실리콘 산화물로 이루어진 그룹으로부터 선택된 어느 하나를 포함하는 것을 특징으로 하는 유전체 구조물.
- 제 6 항에 있어서, 상기 금속 실리콘 산질화물은 IV족 전이 금속의 실리콘 산질화물, V족 전이 금속의 실리콘 산질화물 및 희토류 금속의 실리콘 산질화물로 이루어진 그룹으로부터 선택된 어느 하나를 포함하는 것을 특징으로 하는 유전체 구조물.
- 제 7 항에 있어서, 상기 금속 실리콘 산화물 및 상기 금속 실리콘 산질화물은 티타늄(Ti), 지르코늄(Zr), 하프늄(Hf), 바나듐(V), 니오븀(Nb), 탄탈륨(Ta), 스칸듐(Sc), 이트륨(Y) 및 란탄(La)으로 이루어진 그룹 중에서 선택된 어느 하나를 포함하는 것을 특징으로 하는 유전체 구조물.
- 도전층 패턴이 형성된 기판 상에 금속 실리콘 산화물로 이루어진 제1 유전층을 형성하는 단계;상기 제1 유전층을 플라즈마로 처리하여 상기 제1 유전층 상에 금속 실리콘 산질화물로 이루어진 제2 유전층을 형성하는 단계; 및상기 제1 및 제2 유전층을 부분적으로 식각하여 상기 도전층 패턴 상에 제1 및 제2 유전층 패턴을 형성하는 단계를 포함하는 유전체 구조물의 제조 방법.
- 제 9 항에 있어서, 상기 제1 유전층은 화학 기상 증착 공정, 원자층 증착 공정, 물리 기상 증착 공정 또는 펄스 레이저 증착 공정을 사용하여 형성되는 것을 특징으로 하는 유전체 구조물의 제조 방법.
- 제 9 항에 있어서, 상기 제1 유전층은 암모니아(NH3) 플라즈마 또는 질소(N2) 플라즈마로 처리되는 것을 특징으로 하는 유전체 구조물의 제조 방법.
- 제 11 항에 있어서, 상기 제1 유전층은 300 내지 900℃의 온도 및 250 내지 800W의 전력으로 60 내지 180초 동안 처리되는 것을 특징으로 하는 유전체 구조물의 제조 방법.
- 제 9 항에 있어서, 상기 제1 유전층을 형성하는 단계 및 상기 제2 유전층을 형성하는 단계는 N(여기서, N은 양의 정수이다)회 반복하는 것을 특징으로 하는 유전체 구조물의 제조 방법.
- 반도체 기판 상에 형성된 터널 산화막 패턴;상기 터널 산화막 패턴 상에 형성된 플로팅 게이트;상기 플로팅 게이트 상에 형성되며, 금속 실리콘 산화물로 구성된 제1 유전층 패턴 및 금속 실리콘 산질화물로 구성된 제2 유전층 패턴을 구비하는 유전체 구조물; 및상기 유전체 구조물 상에 형성된 컨트롤 게이트를 포함하는 불휘발성 반도체 메모리 장치.
- 제 14 항에 있어서, 상기 플로팅 게이트는 상기 터널 산화막 패턴 상에 형성된 제1 도전층 패턴 및 상기 제1 도전층 패턴 상에 형성된 제2 도전층 패턴을 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치.
- 제 15 항에 있어서, 상기 제1 도전층 패턴 및 상기 제2 도전층 패턴은 각기 불순물이 도핑된 폴리실리콘 또는 아몰퍼스 실리콘을 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치.
- 제 14 항에 있어서, 상기 제1 유전층 패턴은 IV족 전이 금속의 실리콘 산화물, V족 전이 금속의 실리콘 산화물 및 희토류 금속의 실리콘 산화물로 이루어진 그룹으로부터 선택된 어느 하나를 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치.
- 제 17 항에 있어서, 상기 제2 유전층 패턴은 IV족 전이 금속의 실리콘 산질화물, V족 전이 금속의 실리콘 산질화물 및 희토류 금속의 실리콘 산질화물로 이루어진 그룹으로부터 선택된 어느 하나를 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치.
- 제 14 항에 있어서, 상기 유전체 구조물은 복수 개의 제1 유전층 패턴들 및 제2 유전층 패턴들을 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치.
- 제 14 항에 있어서, 상기 컨트롤 게이트는 도핑된 폴리 실리콘 또는 폴리실리콘 및 금속 실리사이드를 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치.
- 기판 상에 터널 산화막 패턴을 형성하는 단계;상기 터널 산화막 패턴 상에 플로팅 게이트를 형성하는 단계;상기 플로팅 게이트 상에 금속 실리콘 산화물로 이루어진 제1 유전층 패턴 및 금속 실리콘 산질화물로 이루어진 제2 유전층 패턴을 포함하는 유전체 구조물을 형성하는 단계; 및상기 유전체 구조물 상에 컨트롤 게이트를 형성하는 단계를 포함하는 불휘발성 반도체 메모리 장치의 제조 방법.
- 제 21 항에 있어서, 상기 유전체 구조물을 형성하는 단계는,상기 플로팅 게이트 상에 제1 유전층을 형성하는 단계;상기 제1 유전층을 플라즈마로 처리하여 상기 제1 유전층 상에 제2 유전층을 형성하는 단계; 및상기 제1 및 제2 유전층을 부분적으로 식각하는 단계를 포함하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치의 제조 방법.
- 제 22 항에 있어서, 상기 제1 유전층은 화학 기상 증착 공정, 원자층 증착 공정, 물리 기상 증착 공정 또는 펄스 레이저 증착 공정을 사용하여 형성되는 것을 특징으로 하는 불휘발성 반도체 메모리 장치의 제조 방법.
- 제 22 항에 있어서, 상기 제1 유전층은 암모니아 플라즈마 또는 질소 플라즈마로 처리되는 것을 특징으로 하는 불휘발성 반도체 메모리 장치의 제조 방법.
- 제 21 항에 있어서, 상기 제1 유전층을 형성하는 단계 및 상기 제2 유전층을 형성하는 단계를 N(여기서, N은 양의 정수이다)회 반복하는 것을 특징으로 하는 불휘발성 반도체 메모리 장치의 제조 방법.
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