KR20160134561A - 레지스트 조성물 및 패턴 형성 방법 - Google Patents
레지스트 조성물 및 패턴 형성 방법 Download PDFInfo
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- KR20160134561A KR20160134561A KR1020160058686A KR20160058686A KR20160134561A KR 20160134561 A KR20160134561 A KR 20160134561A KR 1020160058686 A KR1020160058686 A KR 1020160058686A KR 20160058686 A KR20160058686 A KR 20160058686A KR 20160134561 A KR20160134561 A KR 20160134561A
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- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는, 합성예 1-1에서 얻어진 화합물의 19F-NMR 스펙트럼을 나타낸다.
도 3은, 합성예 1-2에서 얻어진 화합물의 1H-NMR 스펙트럼을 나타낸다.
도 4는, 합성예 1-2에서 얻어진 화합물의 19F-NMR 스펙트럼을 나타낸다.
도 5는, 합성예 1-3에서 얻어진 화합물의 1H-NMR 스펙트럼을 나타낸다.
도 6은, 합성예 1-3에서 얻어진 화합물의 19F-NMR 스펙트럼을 나타낸다.
도 7은, 합성예 1-4에서 얻어진 화합물의 1H-NMR 스펙트럼을 나타낸다.
도 8은, 합성예 1-4에서 얻어진 화합물의 19F-NMR 스펙트럼을 나타낸다.
Claims (11)
- (A) 하기 (A1) 및 (A2)로 표시되는 각 반복 단위를 갖는 베이스 수지,
(B) 하기 화학식 (3)으로 표시되는 암모늄염
을 필수 성분으로 하는 것을 특징으로 하는 레지스트 조성물.
(A1) 하기 화학식 (1a) 또는 (1b)로 표시되는 반복 단위.
(식 중, R1a는 수소 원자, 불소 원자, 메틸기 또는 트리플루오로메틸기를 나타낸다. Za는 단결합이나, 혹은 (주쇄)-C(=O)-O-Z'- 중 어느 것을 나타낸다. Z'는 히드록시기, 에테르 결합, 에스테르 결합 및 락톤 고리 중 어느 것을 갖고 있어도 좋은 탄소수 1∼10의 직쇄형, 또는 탄소수 3∼10의 분기형 또는 고리형의 알킬렌기를 나타내거나, 혹은 페닐렌기 또는 나프틸렌기를 나타낸다. XA는 산불안정기를 나타낸다. R2a는 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼10의 직쇄형, 또는 탄소수 3∼10의 분기형 또는 고리형의 1가 탄화수소기를 나타낸다. m은 1∼3의 정수이다. n은 0≤n≤5+2p-m을 만족하는 정수이다. p는 0 또는 1이다.)
(A2) 하기 화학식 (2a) 또는 (2b)로 표시되는 반복 단위.
(식 중, R1a, R2a, m, n 및 p는 상기와 동의이다. YL은 수소 원자를 나타내거나, 혹은 히드록시기, 시아노기, 카르보닐기, 카르복실기, 에테르 결합, 에스테르 결합, 술폰산 에스테르 결합, 카보네이트 결합, 락톤 고리, 술톤 고리 및 카르복실산 무수물로부터 선택되는 어느 하나 이상의 구조를 갖는 극성기를 나타낸다.)
(식 중, R1∼R4는 각각 독립적으로, 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼20의 직쇄형, 또는 탄소수 3∼20의 분기형 또는 고리형의 1가 탄화수소기를 나타내고, R1∼R4 중 어느 2개 이상의 조합에 있어서, 서로 결합하여 이들이 결합하는 탄소 원자 및 이들 사이의 탄소 원자와 함께 고리를 형성해도 좋다. X-는 하기 화학식 (3a), (3b) 또는 (3c)로 표시되는 어느 하나의 구조이다.)
(식 중, Rfa, Rfb1, Rfb2, Rfc1, Rfc2, Rfc3은 서로 독립적으로 불소 원자를 나타내거나, 혹은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼40의 직쇄형, 또는 탄소수 3∼40의 분기형 또는 고리형의 1가 탄화수소기를 나타낸다. 또한 Rfb1과 Rfb2, 및 Rfc1과 Rfc2는 서로 결합하여 이들이 결합하는 탄소 원자 및 이들 사이의 탄소 원자와 함께 고리를 형성해도 좋다.) - 제1항에 있어서, 암모늄염(B)이 하기 화학식 (4)로 표시되는 구조인 것을 특징으로 하는 레지스트 조성물.
(식 중, R1, R2, R3 및 R4는 상기와 동의이다. R5는 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼40의 직쇄형, 또는 탄소수 3∼40의 분기형 또는 고리형의 1가 탄화수소기를 나타낸다. Rf는 서로 독립적으로 수소 원자, 불소 원자 혹은 플루오로알킬기를 나타낸다. L은 단결합 또는 연결기를 나타낸다. X1은 0∼10의 정수를 나타낸다. X2는 1∼5의 정수를 나타낸다.) - 제1항에 있어서, 베이스 수지(A)가, 하기 화학식 (6a) 또는 (6b)로 표시되는 어느 반복 단위를 더 함유하는 것을 특징으로 하는 레지스트 조성물.
(식 중, R1a, R6 및 Rf1은 상기와 동의이다. L'는 탄소수 2∼5의 알킬렌기를 나타낸다. R11, R12 및 R13은 각각 독립적으로, 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼10의 직쇄형, 분기형 또는 고리형의 알킬기 또는 알케닐기를 나타내거나, 혹은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 6∼18의 아릴기를 나타낸다. 또한, R11, R12 및 R13 중 어느 2개는 서로 결합하여 식 중의 황 원자와 함께 고리를 형성해도 좋다. L''는 단결합이나, 혹은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼20의 직쇄형, 또는 탄소수 3∼20의 분기형 또는 고리형의 2가 탄화수소기를 나타낸다. q는 0 또는 1을 나타내지만, L''가 단결합일 때, q는 반드시 0이다.) - 제1항에 있어서, 하기 화학식 (7) 또는 (8)로 표시되는 광산발생제를 더 포함하는 것을 특징으로 하는 레지스트 조성물.
(식 중, R11, R12, R13 및 X-는 상기와 동의이다.)
(식 중, X1, X2 및 Rf는 상기와 동의이다. L0은 단결합 또는 연결기를 나타낸다. R600 및 R700은 각각 독립적으로, 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼30의 직쇄형, 또는 탄소수 3∼30의 분기형 또는 고리형의 1가 탄화수소기를 나타낸다. R800은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼30의 직쇄형, 또는 탄소수 3∼30의 분기형 또는 고리형의 2가 탄화수소기를 나타낸다. 또한, R600, R700 및 R800 중 어느 2개 이상은 서로 결합하여 식 중의 황 원자와 함께 고리를 형성해도 좋다.) - 제1항에 있어서, 함질소 화합물을 더 함유하는 것을 특징으로 하는 레지스트 조성물.
- 제1항에 있어서, 하기 화학식 (9a) 또는 (9b) 중 어느 것으로 표시되는 구조의 오늄염을 더 함유하는 것을 특징으로 하는 레지스트 조성물.
(식 중, Rq1은 수소 원자를 나타내거나, 혹은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼40의 직쇄형, 또는 탄소수 3∼40의 분기형 또는 고리형의 1가 탄화수소기를 나타낸다. 다만 상기 화학식 (9a)에 있어서, 술포기 α 위치의 탄소 원자에 있어서의 수소 원자가, 불소 원자 혹은 플루오로알킬기로 치환되어 있는 경우를 제외한다. Rq2는 수소 원자를 나타내거나, 혹은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼40의 직쇄형, 또는 탄소수 3∼40의 분기형 또는 고리형의 1가 탄화수소기를 나타낸다. Mq+는 하기 화학식 (c1), (c2) 또는 (c3) 중 어느 것으로 표시되는 오늄 양이온을 나타낸다.)
(식 중, R1, R2, R3, R4, R11, R12 및 R13은 상기와 동의이다. R14 및 R15는 각각 독립적으로, 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 1∼10의 직쇄형, 분기형 또는 고리형의 알킬기 또는 알케닐기를 나타내거나, 혹은 수소 원자의 일부 또는 전부가 헤테로 원자로 치환되어 있어도 좋고, 헤테로 원자가 개재되어도 좋은 탄소수 6∼18의 아릴기를 나타낸다.) - 제1항에 있어서, 물에 불용 또는 난용이고 알칼리 현상액에 가용인 계면활성제, 또는 물 및 알칼리 현상액에 불용 또는 난용인 계면활성제, 또는 둘 다를 더 함유하는 것을 특징으로 하는 레지스트 조성물.
- 제1항에 기재된 화학 증폭형 레지스트 조성물을 기판 상에 도포하는 공정과, 가열 처리 후 포토마스크를 통해 KrF 엑시머 레이저, ArF 엑시머 레이저, 전자선, EUV 중 어느 것으로 노광하는 공정과, 가열 처리한 후, 현상액을 이용하여 현상하는 공정을 포함하는 것을 특징으로 하는 패턴 형성 방법.
- 제9항에 있어서, 상기 노광이, 굴절률 1.0 이상의 액체를 레지스트 도포막과 투영 렌즈 사이에 개재시켜 행하는 액침 노광인 것을 특징으로 하는 패턴 형성 방법.
- 제10항에 있어서, 상기 레지스트 도포막 상에 보호막을 더 도포하고, 상기 보호막과 투영 렌즈 사이에 상기 액체를 개재시켜 액침 노광을 행하는 것을 특징으로 하는 패턴 형성 방법.
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