KR100450681B1 - 반도체 메모리 소자의 커패시터 및 그 제조 방법 - Google Patents
반도체 메모리 소자의 커패시터 및 그 제조 방법 Download PDFInfo
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- KR100450681B1 KR100450681B1 KR10-2002-0048404A KR20020048404A KR100450681B1 KR 100450681 B1 KR100450681 B1 KR 100450681B1 KR 20020048404 A KR20020048404 A KR 20020048404A KR 100450681 B1 KR100450681 B1 KR 100450681B1
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- Prior art keywords
- hfo
- film
- lower electrode
- dielectric layer
- dielectric
- Prior art date
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- 239000003990 capacitor Substances 0.000 title claims abstract description 110
- 239000004065 semiconductor Substances 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 203
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- 239000000460 chlorine Substances 0.000 claims abstract description 55
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 52
- 230000004888 barrier function Effects 0.000 claims abstract description 32
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000001301 oxygen Substances 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 141
- 239000002131 composite material Substances 0.000 claims description 53
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 43
- 229920005591 polysilicon Polymers 0.000 claims description 40
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 35
- 229910052718 tin Inorganic materials 0.000 claims description 35
- 238000000231 atomic layer deposition Methods 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 238000005229 chemical vapour deposition Methods 0.000 claims description 30
- 230000000903 blocking effect Effects 0.000 claims description 24
- 150000004767 nitrides Chemical class 0.000 claims description 22
- 229910052707 ruthenium Inorganic materials 0.000 claims description 19
- 229910052741 iridium Inorganic materials 0.000 claims description 18
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 12
- 239000010970 precious metal Substances 0.000 claims description 12
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 229910000510 noble metal Inorganic materials 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- -1 Ta 2 O 5 Inorganic materials 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 6
- 238000009832 plasma treatment Methods 0.000 claims description 4
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims description 3
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 3
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Inorganic materials [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 3
- 125000001309 chloro group Chemical group Cl* 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 12
- 230000002411 adverse Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 133
- 238000000137 annealing Methods 0.000 description 31
- 238000011156 evaluation Methods 0.000 description 13
- 229910004166 TaN Inorganic materials 0.000 description 12
- 238000000151 deposition Methods 0.000 description 12
- 230000008021 deposition Effects 0.000 description 11
- 239000012535 impurity Substances 0.000 description 11
- 239000002356 single layer Substances 0.000 description 11
- 238000005137 deposition process Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- 239000000376 reactant Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 238000001039 wet etching Methods 0.000 description 5
- 238000000089 atomic force micrograph Methods 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000012495 reaction gas Substances 0.000 description 3
- UOACKFBJUYNSLK-XRKIENNPSA-N Estradiol Cypionate Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H](C4=CC=C(O)C=C4CC3)CC[C@@]21C)C(=O)CCC1CCCC1 UOACKFBJUYNSLK-XRKIENNPSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000013212 metal-organic material Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000004151 rapid thermal annealing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 125000004213 tert-butoxy group Chemical group [H]C([H])([H])C(O*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- QVMHUALAQYRRBM-UHFFFAOYSA-N [P].[P] Chemical compound [P].[P] QVMHUALAQYRRBM-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
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- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
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- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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Abstract
Description
Claims (66)
- 반도체 기판상에 하부 전극을 형성하는 단계와,상기 하부 전극 위에 HfO2유전막을 형성하는 단계와,상기 HfO2유전막을 1 × 10-8∼ 1 torr의 압력하에서 가스 공급 없이 진공 열처리하는 단계와,상기 진공 열처리된 HfO2유전막 위에 상부 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제1항에 있어서,상기 하부 전극은 폴리실리콘, 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제2항에 있어서,상기 하부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제1항에 있어서,상기 HfO2유전막은 20 ∼ 200Å의 두께를 가지도록 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제1항에 있어서,상기 HfO2유전막은 CVD (chemical vapor deposition) 또는 ALD (atomic layer deposition) 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제1항에 있어서,상기 진공 열처리는 200 ∼ 850℃의 온도로 행해지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제1항에 있어서,상기 상부 전극은 폴리실리콘, 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제7항에 있어서,상기 상부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제1항에 있어서,상기 상부 전극은 MOCVD (metal-organic chemical vapor deposition) 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제2항에 있어서,상기 하부 전극은 폴리실리콘으로 이루어지고,상기 HfO2유전막을 형성하기 전에, 상기 하부 전극 위에 실리콘 질화막을 형성하는 단계를 더 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제10항에 있어서,상기 실리콘 질화막을 형성하기 위하여 상기 하부 전극의 표면을 RTN (rapid thermal nitridation) 처리하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 반도체 기판상에 하부 전극을 형성하는 단계와,상기 하부 전극 위에 Al2O3유전막을 형성하는 단계와,상기 Al2O3유전막 위에 HfO2유전막을 형성하는 단계와,상기 HfO2유전막을 1 × 10-8∼ 1 torr의 압력하에서 가스 공급 없이 진공 열처리하는 단계와,상기 진공 열처리된 HfO2유전막 위에 상부 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 Al2O3유전막은 CVD 또는 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 HfO2유전막은 상기 Al2O3유전막보다 더 작은 두께로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 Al2O3유전막은 20 ∼ 60Å의 두께로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 HfO2유전막은 10 ∼ 60Å의 두께로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 삭제
- 제12항에 있어서,상기 진공 열처리는 200 ∼ 850℃의 온도로 행해지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 HfO2유전막을 산소 분위기에서 열처리하는 단계를 더 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제19항에 있어서,상기 산소 분위기에서의 열처리는 상기 진공 열처리 전에 행해지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제19항에 있어서,상기 산소 분위기에서의 열처리는 상기 진공 열처리 후에 행해지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제19항에 있어서,상기 산소 분위기에서의 열처리를 위하여 상기 HfO2유전막을 200 ∼ 600℃의 온도에서 O3또는 O2플라즈마 처리하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 HfO2유전막은 CVD 또는 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 Al2O3유전막 및 HfO2유전막은 각각 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 하부 전극은 폴리실리콘, 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제25항에 있어서,상기 하부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 상부 전극은 폴리실리콘, 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제27항에 있어서,상기 상부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항에 있어서,상기 상부 전극은 MOCVD (metal-organic chemical vapor deposition) 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제25항에 있어서,상기 하부 전극은 폴리실리콘으로 이루어지고,상기 Al2O3유전막을 형성하기 전에, 상기 하부 전극 위에 실리콘 질화막을 형성하는 단계를 더 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제30항에 있어서,상기 실리콘 질화막을 형성하기 위하여 상기 하부 전극의 표면을 RTN (rapid thermal nitridation) 처리하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 반도체 기판상에 하부 전극을 형성하는 단계와,상기 하부 전극 위에 HfO2유전막을 형성하는 단계와,상기 HfO2유전막을 1 × 10-8∼ 1 torr의 압력하에서 가스 공급 없이 진공 열처리하는 단계와,상기 진공 열처리된 HfO2유전막 위에 염소 차단막을 형성하는 단계와,상기 염소 차단막 위에 상부 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 염소 차단막은 Al2O3, Ta2O5, SiO2또는 Si3N4로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제33항에 있어서,상기 염소 차단막은 CVD 또는 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제33항에 있어서,상기 염소 차단막은 3 ∼ 50Å의 두께로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 HfO2유전막은 CVD 또는 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 HfO2유전막은 20 ∼ 80Å의 두께로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 진공 열처리는 200 ∼ 850℃의 온도로 행해지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 염소 차단막을 산소 분위기에서 열처리하는 단계를 더 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제39항에 있어서,상기 산소 분위기에서의 열처리를 위하여 상기 염소 차단막을 200 ∼ 600℃의 온도에서 O3또는 O2플라즈마 처리하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 하부 전극은 폴리실리콘, 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제41항에 있어서,상기 하부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 상부 전극은 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제43항에 있어서,상기 상부 전극은 염소를 함유하는 소스 가스를 사용하여 CVD 또는 ALD 방법에 의하여 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제43항에 있어서,상기 상부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제32항에 있어서,상기 하부 전극은 폴리실리콘으로 이루어지고,상기 HfO2유전막을 형성하기 전에, 상기 하부 전극 위에 실리콘 질화막을 형성하는 단계를 더 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제46항에 있어서,상기 실리콘 질화막을 형성하기 위하여 상기 하부 전극의 표면을 RTN (rapid thermal nitridation) 처리하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 반도체 기판상에 하부 전극을 형성하는 단계와,상기 하부 전극 위에 Al2O3유전막을 형성하는 단계와,상기 Al2O3유전막 위에 HfO2유전막을 형성하는 단계와,상기 HfO2유전막을 1 × 10-8∼ 1 torr의 압력하에서 가스 공급 없이 진공 열처리하는 단계와,상기 진공 열처리된 HfO2유전막 위에 염소 차단막을 형성하는 단계와,상기 염소 차단막 위에 상부 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제48항에 있어서,상기 하부 전극은 폴리실리콘, 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제49항에 있어서,상기 하부 전극은 TiN, TaN, Wn, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제48항에 있어서,상기 HfO2유전막은 상기 Al2O3유전막보다 더 작은 두께로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 삭제
- 제48항에 있어서,상기 진공 열처리는 200 ∼ 850℃의 온도로 행해지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제48항에 있어서,상기 HfO2유전막은 CVD 또는 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제48항에 있어서,상기 염소 차단막은 Al2O3, Ta2O5, SiO2또는 Si3N4로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제55항에 있어서,상기 염소 차단막은 CVD 또는 ALD 방법으로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제48항에 있어서,상기 염소 차단막을 산소 분위기에서 열처리하는 단계를 더 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제57항에 있어서,상기 산소 분위기에서의 열처리를 위하여 상기 염소 차단막을 200 ∼ 600℃의 온도에서 O3또는 O2플라즈마 처리하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제48항에 있어서,상기 상부 전극은 금속 질화물 또는 귀금속으로 이루어지는 것을 특징으로하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제59항에 있어서,상기 상부 전극은 TiN, TaN, WN, Ru, Ir 또는 Pt로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 반도체 기판상에 하부 전극을 형성하는 단계와,상기 하부 전극 위에 유전막을 형성하는 단계와,상기 유전막을 1 × 10-8∼ 1 torr의 압력하에서 가스 공급 없이 진공 열처리하는 단계와,상기 진공 열처리된 유전막 위에 상부 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제61항에 있어서,상기 유전막은 Y2O3, HfO2, Al2O3, TiO2, BaO, SrO, ZrO2, Ta2O5또는 Mb2O5로 이루어지는 단일막 또는 이들의 복합막으로 이루어지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터 제조 방법.
- 제12항의 방법에 의하여 제조된 것을 특징으로 하는 반도체 메모리 소자의 커패시터.
- 제63항에 있어서,상기 Al2O3유전막/HfO2유전막의 두께비는 1 보다 큰 것을 특징으로 하는 반도체 메모리 소자의 커패시터.
- 제63항에 있어서,상기 Al2O3유전막은 20 ∼ 60Å의 두께를 가지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터.
- 제63항에 있어서,상기 HfO2유전막은 10 ∼ 60Å의 두께를 가지는 것을 특징으로 하는 반도체 메모리 소자의 커패시터.
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US10/452,979 US6946342B2 (en) | 2002-08-16 | 2003-06-02 | Semiconductor device and method for manufacturing the same |
US10/713,577 US6897106B2 (en) | 2002-08-16 | 2003-11-12 | Capacitor of semiconductor memory device that has composite Al2O3/HfO2 dielectric layer and method of manufacturing the same |
US11/009,198 US20050087791A1 (en) | 2002-08-16 | 2004-12-08 | Capacitor of semiconductor memory device that has composite A12O3/HfO2 dielectric layer and method of manufacturing the same |
US11/198,541 US20050272272A1 (en) | 2002-08-16 | 2005-08-05 | Semiconductor device and method for manufacturing the same |
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US20040033661A1 (en) | 2004-02-19 |
US20050272272A1 (en) | 2005-12-08 |
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