KR100983426B1 - 저유전율 비정질 실리카계 피막의 형성방법 및 상기 방법에의해 얻을 수 있는 저유전율 비정질 실리카계 피막 - Google Patents
저유전율 비정질 실리카계 피막의 형성방법 및 상기 방법에의해 얻을 수 있는 저유전율 비정질 실리카계 피막 Download PDFInfo
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- KR100983426B1 KR100983426B1 KR1020057007529A KR20057007529A KR100983426B1 KR 100983426 B1 KR100983426 B1 KR 100983426B1 KR 1020057007529 A KR1020057007529 A KR 1020057007529A KR 20057007529 A KR20057007529 A KR 20057007529A KR 100983426 B1 KR100983426 B1 KR 100983426B1
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- South Korea
- Prior art keywords
- film
- dielectric constant
- amorphous silica
- coating
- substrate
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 262
- 238000000576 coating method Methods 0.000 title claims abstract description 255
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- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 9
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- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 62
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 51
- 239000004065 semiconductor Substances 0.000 claims description 41
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 claims description 40
- 238000002360 preparation method Methods 0.000 claims description 39
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 claims description 38
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- VDZOOKBUILJEDG-UHFFFAOYSA-M tetrabutylammonium hydroxide Chemical compound [OH-].CCCC[N+](CCCC)(CCCC)CCCC VDZOOKBUILJEDG-UHFFFAOYSA-M 0.000 claims description 16
- 239000012298 atmosphere Substances 0.000 claims description 15
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 14
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 14
- 125000000217 alkyl group Chemical group 0.000 claims description 14
- 125000003118 aryl group Chemical group 0.000 claims description 14
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- 229910052700 potassium Inorganic materials 0.000 claims description 14
- 239000011591 potassium Substances 0.000 claims description 14
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 12
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 12
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- 125000005843 halogen group Chemical group 0.000 description 6
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- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 1
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 description 1
- 229940095070 tetrapropyl orthosilicate Drugs 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- XVYIJOWQJOQFBG-UHFFFAOYSA-N triethoxy(fluoro)silane Chemical compound CCO[Si](F)(OCC)OCC XVYIJOWQJOQFBG-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- BOVWGKNFLVZRDU-UHFFFAOYSA-N triethoxy(trifluoromethyl)silane Chemical compound CCO[Si](OCC)(OCC)C(F)(F)F BOVWGKNFLVZRDU-UHFFFAOYSA-N 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- ORVBHOQTQDOUIW-UHFFFAOYSA-N trimethoxy(trifluoromethyl)silane Chemical compound CO[Si](OC)(OC)C(F)(F)F ORVBHOQTQDOUIW-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- PDSVZUAJOIQXRK-UHFFFAOYSA-N trimethyl(octadecyl)azanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)C PDSVZUAJOIQXRK-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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Abstract
Description
Claims (17)
- 높은 막강도를 갖고, 소수성이 뛰어나고 평활한 저유전율 비정질 실리카계 피막을 기판상에 형성하는 방법으로서,(a)테트라알킬오르소실리케이트(TAOS) 및 하기 일반식(I)로 표시되는 알콕시실란(AS)을, 테트라알킬암모늄하이드로옥사이드(TAAOH)의 존재하에서 가수분해하여 얻어지는 규소화합물을 포함하는 액상조성물을 조제하는 공정,XnSi(OR)4-n (I)(식중, X는 수소원자, 불소원자, 또는 탄소수 1∼8의 알킬기, 불소치환알킬기, 아릴기 또는 비닐기를 나타내고, R은 수소원자, 또는 탄소수 1∼8의 알킬기, 아릴기 또는 비닐기를 나타낸다. 또한, n은 0∼3의 정수이다.)(b)상기 액상조성물을 기판상에 도포하는 공정,(c)상기 기판을 80∼350℃의 온도에서 가열처리하는 공정, 및(d)상기 기판을 350∼450℃의 온도에서 소성처리하는 공정을 포함하는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 높은 막강도를 갖고, 소수성이 뛰어나고 평활한 저유전율 비정질 실리카계 피막을 기판에 형성하는 방법으로서,(a)테트라알킬오르소실리케이트(TAOS)를 테트라알킬암모늄하이드로옥사이드(TAAOH)의 존재하에서 가수분해 또는 부분가수분해한 후, 하기 일반식(I)로 표시되는 알콕시실란(AS) 또는 그 가수분해물 또는 부분가수분해물과 혼합하여 얻거나,또는 이들의 일부 또는 전부를 더욱 가수분해하여 얻을 수 있는 규소화합물을 포함한 액상조성물을 조제하는 공정,XnSi(OR)4-n (I)(식중, X는 수소원자, 불소원자, 또는 탄소수 1∼8의 알킬기, 불소치환알킬기, 아릴기 또는 비닐기를 나타내고, R은 수소원자, 또는 탄소수 1∼8의 알킬기, 아릴기 또는 비닐기를 나타낸다. 또한, n은 0∼3의 정수이다.)(b)상기 액상조성물을 기판상에 도포하는 공정,(c)상기 기판을 80∼350℃의 온도에서 가열처리하는 공정, 및(d)상기 기판을 350∼450℃의 온도에서 소성처리하는 공정을 포함하는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 내지 제 2 항 중의 어느 한 항에 있어서, 상기 조제공정(a)에서 사용되는 테트라알킬오르소실리케이트(TAOS)가, 테트라에틸오르소실리케이트(TEOS), 테트라메틸오르소실리케이트(TMOS) 또는 그 혼합물인 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 조제공정(a)에서 사용되는 알콕시실란(AS)이, 메틸트리메톡시실란(MTMS), 메틸트리에톡시실란(MTES) 또는 그 혼합물인 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 조제공정(a)에서 사용되는 테트라알킬암모늄하이드로옥사이드(TAAOH)가, 테트라프로필암모늄하이드로옥사이드(TPAOH), 테트라부틸암모늄하이드로옥사이드(TBAOH) 또는 그 혼합물인 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 조제공정(a)에서 사용되는 테트라알킬암모늄하이드로옥사이드(TAAOH) 중에 포함되는, 나트륨(Na), 칼륨(K)과 같은 알칼리금속원소의 화합물로 이루어지는 불순물의 함유량이, 각각 원소기준으로 50중량ppb 이하인 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 조제공정(a)에서 사용되는 테트라알킬암모늄하이드로옥사이드(TAAOH)중에 포함되는, 브롬(Br), 염소(Cl)와 같은 할로겐족원소의 화합물로 이루어지는 불순물의 함유량이, 각각 원소기준으로 1중량ppm 이하인 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 조제공정(a)에서 사용되는 테트라알킬오르소실리케이트(TAOS)와 상기 알콕시실란(AS)의 몰비(TAOS/AS)가, SiO2 환산기준으로 6/4∼2/8의 범위에 있는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 조제공정(a)에서 사용되는 테트라알킬암모늄하이드로옥사이드(TAAOH)와 실리카계 피막형성성분(TAOS+AS)의 몰비(TAAOH/(TAOS+AS))가, SiO2 환산기준으로 1/10∼7/10의 범위에 있는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 도포공정(b)에 있어서의 조작을 스핀코트법으로 행하는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 가열처리공정(c)에 있어서의 조작을 1∼10분간, 질소분위기하 또는 공기분위기하에서 행하는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 있어서, 상기 소성처리공정(d)에 있어서의 조작을 5∼90분간, 질소가스분위기하에서 실시하는 것을 특징으로 하는 저유전율 비정질 실리카계 피막의 형성방법.
- 제 1 항 또는 제 2 항에 기재된 방법을 이용하여 얻어지는 피막이, 2.5 이하의 비유전율과 6.0GPa 이상의 영 탄성률로 이루어지는 막강도를 갖는 것을 특징으로 하는 저유전율 비정질 실리카계 피막.
- 제 13 항에 있어서, 상기 피막은, 상기 피막중에 포함되는 세공의 평균 세공지름이 3nm 이하이고, 또한 2nm 이하의 마이크로포어의 세공용적 함유율이 70% 이상인 것을 특징으로 하는 저유전율 비정질 실리카계 피막.
- 제 13 항에 있어서, 상기 피막이, 상기 피막의 표면거칠기(Rms)가 1nm 이하인 평활한 표면을 갖는 것을 특징으로 하는 저유전율 비정질 실리카계 피막.
- 제 13 항에 있어서, 상기 피막이, MFI 결정구조과 같은 X선회절피크를 가지지 않는 비정질의 실리카계 피막인 것을 특징으로 하는 저유전율 비정질 실리카계 피막.
- 제 13 항에 있어서, 상기 피막이, 반도체기판상에 형성된 층간절연막인 것을 특징으로 하는 저유전율 비정질 실리카계 피막.
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PCT/JP2003/013691 WO2004040635A1 (ja) | 2002-10-31 | 2003-10-27 | 低誘電率非晶質シリカ系被膜の形成方法および該方法より得られる低誘電率非晶質シリカ系被膜 |
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