KR101211821B1 - Sr-Ti-O계 막의 성막 방법 및 기억 매체 - Google Patents
Sr-Ti-O계 막의 성막 방법 및 기억 매체 Download PDFInfo
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- KR101211821B1 KR101211821B1 KR1020127014233A KR20127014233A KR101211821B1 KR 101211821 B1 KR101211821 B1 KR 101211821B1 KR 1020127014233 A KR1020127014233 A KR 1020127014233A KR 20127014233 A KR20127014233 A KR 20127014233A KR 101211821 B1 KR101211821 B1 KR 101211821B1
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- 238000000034 method Methods 0.000 title claims description 87
- 230000015572 biosynthetic process Effects 0.000 title claims description 31
- 229910003077 Ti−O Inorganic materials 0.000 claims abstract description 158
- 239000002994 raw material Substances 0.000 claims abstract description 110
- 238000012545 processing Methods 0.000 claims abstract description 98
- 238000000137 annealing Methods 0.000 claims abstract description 54
- 229910004356 Ti Raw Inorganic materials 0.000 claims abstract description 53
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- 230000008021 deposition Effects 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 6
- 229910052712 strontium Inorganic materials 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
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- -1 cyclopentadienyl compound Chemical class 0.000 claims description 3
- 150000004703 alkoxides Chemical class 0.000 claims description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 2
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- 238000010438 heat treatment Methods 0.000 description 18
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- 238000006243 chemical reaction Methods 0.000 description 11
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- 239000010410 layer Substances 0.000 description 11
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
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- 238000000231 atomic layer deposition Methods 0.000 description 6
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- 229910021193 La 2 O 3 Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
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- NLZDQVUUTOVSHH-UHFFFAOYSA-N CC1=C(C(=C(C1(C)[Sr]C1(C(=C(C(=C1C)C)C)C)C)C)C)C Chemical compound CC1=C(C(=C(C1(C)[Sr]C1(C(=C(C(=C1C)C)C)C)C)C)C)C NLZDQVUUTOVSHH-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- 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
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
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- 239000000919 ceramic Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910003087 TiOx Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- HLLICFJUWSZHRJ-UHFFFAOYSA-N tioxidazole Chemical compound CCCOC1=CC=C2N=C(NC(=O)OC)SC2=C1 HLLICFJUWSZHRJ-UHFFFAOYSA-N 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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Abstract
Description
도 2는 본 발명의 성막 방법을 설명하기 위한 공정 단면도.
도 3은 본 발명의 성막 방법에서 얻어지는 Sr-Ti-O계 막을 나타내는 주사형 전자 현미경 사진.
도 4는 본 발명의 성막 방법의 성막 시퀀스를 나타내는 도면.
도 5는 Sr-Ti-O계 막에 있어서의 원자수 비로의 Sr/Ti비와, 어닐한 후에 있어서의 XRD에 의한 SrTiO3 결정의 (110) 피크 높이의 관계를 나타내는 도면.
도 6은 처리 가스 공급 기구의 다른 예를 나타내는 도면.
Claims (13)
- 처리용기내에 Ru막이 형성된 기판을 배치하고, 기체상의 Ti 원료와, 기체상의 Sr 원료와, 기체상의 산화제를 상기 처리용기내에 도입해서 Ru막 상에 두께 10㎚ 이하의 제 1 Sr-Ti-O계 막을 성막하는 것과,
상기 제 1 Sr-Ti-O계 막을 어닐해서 결정화시키는 것과,
상기 제 1 Sr-Ti-O계 막을 형성한 후, 기체상의 Ti 원료와, 기체상의 Sr 원료와, 기체상의 산화제를 상기 처리용기내에 도입하고 그 위에 제 2 Sr-Ti-O계 막을 성막하는 것과,
상기 제 2 Sr-Ti-O계 막을 어닐해서 결정화시키는 것을 포함하는 Sr-Ti-O계 막의 성막 방법으로서,
상기 제 1 Sr-Ti-O계 막의 형성 및 상기 제 2 Sr-Ti-O계 막의 형성은 형성되는 막의 막 중의 Sr과 Ti의 비율 Sr/Ti가 원자수 비로 0.9~1.4로 되도록 하는 조건에서 실행되는 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 제 2 Sr-Ti-O계 막을 어닐한 후에, 실질적으로 결정화되어 있지 않은 제 3 Sr-Ti-O계 막을 성막하는 것을 더 포함하는 Sr-Ti-O계 막의 성막 방법. - 제 2 항에 있어서,
상기 제 3 Sr-Ti-O계 막은 막 중의 Sr과 Ti의 비율 Sr/Ti가 원자수 비로 1보다 작아지도록 해서 성막하는 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 제 2 Sr-Ti-O계 막을 어닐한 후에, 실질적으로 결정화되어 있지 않은 산화막을 성막하는 것을 더 포함하는 Sr-Ti-O계 막의 성막 방법. - 제 4 항에 있어서,
상기 산화막은 TiO2막, Al2O3막, L2O3막 중의 어느 하나인 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 제 1 Sr-Ti-O계 막을 어닐해서 결정화시키는 것 및 상기 제 2 Sr-Ti-O계 막을 어닐해서 결정화시키는 것은 비산화성 분위기에서 500~750℃의 온도 범위에서 실행하는 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 제 2 Sr-Ti-O계 막을 어닐해서 결정화시킨 후, 산화성 분위기에서 막 중에 산소를 도입하기 위한 큐어 처리를 실행하는 Sr-Ti-O계 막의 성막 방법. - 제 7 항에 있어서,
상기 큐어 처리는 350~500℃의 온도 범위에서 실행하는 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 제 1 Sr-Ti-O계 막, 상기 제 2 Sr-Ti-O계 막, 또는 이들 모두를 성막할 때에,
기체상의 Sr 원료를 상기 처리용기내에 도입하고 기판상에 Sr을 흡착시키는 것과, 기체상의 산화제를 상기 처리용기내에 도입해서 Sr을 산화시키는 것과, 이들 후에 처리용기내를 퍼지하는 것을 갖는 SrO막 성막단계와,
기체상의 Ti 원료를 상기 처리용기내에 도입해서 기판상에 Ti를 흡착시키는 것과, 기체상의 산화제를 상기 처리용기내에 도입해서 Ti막을 산화시키는 것과, 이들 후에 처리용기내를 퍼지하는 것을 갖는 TiO막 성막단계
를 복수회 실행하는 Sr-Ti-O계 막의 성막 방법. - 제 9 항에 있어서,
상기 SrO막 성막단계와 상기 TiO막 성막단계를, 상기 SrO막 성막단계끼리, 상기 TiO막 성막단계끼리, 또는 이들 모두가 복수회 계속해서 실행되는 시퀀스를 포함하도록 해서 복수회 실행하는 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 Sr 원료는 사이클로펜타다이에닐 화합물인 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 Ti 원료는 알콕사이드인 Sr-Ti-O계 막의 성막 방법. - 제 1 항에 있어서,
상기 산화제는 O3 또는 O2인 Sr-Ti-O계 막의 성막 방법.
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'Dielectirc Properties of SrTiO3 Thin Films at Low temperature', IEEE Trans. on Applied Superconductivity, Vol.3, No.1(1993.03) |
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