KR102065663B1 - 레지스트 보호막 재료 및 패턴 형성 방법 - Google Patents
레지스트 보호막 재료 및 패턴 형성 방법 Download PDFInfo
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Abstract
Description
도 2는 비교 보호막 용액인 비교 TC-1의 분광 특성을 도시한 차트이다.
도 3은 비교 보호막 용액인 비교 TC-2의 분광 특성을 도시한 차트이다.
도 4는 비교 보호막 용액인 비교 TC-4의 분광 특성을 도시한 차트이다.
Claims (10)
- 웨이퍼에 형성한 포토레지스트층 상에 레지스트 보호막 재료에 의한 보호막을 형성하고, 노광을 행한 후 현상을 행하는 리소그래피에 의한 패턴 형성 방법에 있어서 이용하는 레지스트 보호막 재료로서, 하기 일반식(1)에서 나타나는 1,1,1,3,3,3-헥사플루오로-2-프로판올기를 갖는 스티렌에서 유래하는 반복 단위와 아세나프틸렌류에서 유래하는 반복 단위를 갖는 고분자 화합물을 베이스 수지로 하고,
모든 용매 중에서 디이소프로필 에테르, 디이소부틸 에테르, 디이소펜틸 에테르, 디-n-펜틸에테르, 메틸시클로펜틸 에테르, 메틸시클로헥실 에테르, 디-n-부틸에테르, 디-sec-부틸에테르, 디-sec-펜틸에테르, 디-tert-아밀에테르, 디-n-헥실에테르에서 선택되는 에테르계 용매를 50중량% 이상 함유하는 것을 특징으로 하는 레지스트 보호막 재료.
[화학식 7]
(일반식(1) 중에서, R은 수소 원자 또는 히드록시기, R1은 수소 원자, 히드록시기, 탄소수 1∼10의 직쇄상, 분기상 혹은 환상의 알킬기, 알콕시기, 아실록시기, 알콕시카르보닐기, 카르복실기 또는 -OC(=O)R2(R2는 탄소수 1∼10의 직쇄상, 분기상 혹은 환상의 알킬기 또는 불소화 알킬기)이고, m은 1 또는 2이다. p, q는 0<p<1.0, 0<q<1.0의 양수로, 0<p+q≤1.0이다.) - 제 1 항에 있어서,
상기 보호막 재료가 알칼리 현상액에 가용인 것을 특징으로 하는 레지스트 보호막 재료. - 삭제
- 제 2 항에 있어서,
에테르계 용매에 덧붙여 1-부틸알코올, 2-부틸알코올, 이소부틸알코올, tert-부틸알코올, 1-펜타놀, 2-펜타놀, 3-펜타놀, tert-아밀알코올, 네오펜틸알코올, 2-메틸-1-부탄올, 3-메틸-1-부탄올, 3-메틸-3-펜타놀, 1-헥사놀, 2-헥사놀, 3-헥사놀, 2,3-디메틸-2-부탄올, 3,3-디메틸-1-부탄올, 3,3-디메틸-2-부탄올, 2-에틸-1-부탄올, 2-메틸-1-펜타놀, 2-메틸-2-펜타놀, 2-메틸-3-펜타놀, 3-메틸-1-펜타놀, 3-메틸-2-펜타놀, 3-메틸-3-펜타놀, 4-메틸-1-펜타놀, 4-메틸-2-펜타놀, 4-메틸-3-펜타놀, 시클로펜타놀, 시클로헥사놀에서 선택되는 알코올계 용매를 함유하는 것을 특징으로 하는 레지스트 보호막 재료. - 삭제
- 제 1 항에 있어서,
상기 베이스 수지는 하기 일반식으로 나타내어진 카르복실시, 술포기, 또는 카르복실기 및 술포기를 갖는 반복 단위 r이 더 공중합하여 이루어지고,
상기 1,1,1,3,3,3-헥사플루오로-2-프로판올기를 갖는 스티렌에 유래하는 반복 단위 p, 아세나프틸렌류에 유래하는 반복 단위 q, 및 카르복실시, 술포기, 또는 카르복실기 및 술포기를 갖는 반복 단위 r의 공중합비는 0.1≤p<1.0, 0<q≤0.9, 0.5≤p+q≤1.0, 0<r≤0.5이고, p+q+r=1.0인 것을 특징으로 하는 레지스트 보호막 재료.
[화학식 8]
(식 중에서, R01는 수소 원자, 메틸기, -COOH 또는 -CH2COOH이다. R02는 단결합, 탄소수 1∼10의 직쇄상, 분기상 또는 환상의 알킬렌기, 페닐렌기 또는 나프틸렌기이고, 알킬렌기는 에테르기 또는 에스테르기를 갖고 있어도 된다. R03는 수소 원자, 또는 R02와 결합하여 R02와 R03를 맞추어 이들이 결합하는 탄소 원자와 함께 탄소수 4∼12의 지환을 형성해도 된다. R04는 수소 원자 또는 메틸기, R05는 단결합 또는 탄소수 1∼10의 직쇄상, 분기상 또는 환상의 알킬렌기 또는 페닐렌기이고, 알킬렌기는 에스테르기를 갖고 있어도 된다. R06는 수소 원자, 또는 R05와 결합하여 R05와 R06를 맞추어 이들이 결합하는 탄소 원자와 함께 탄소수 4∼12의 지환을 형성해도 된다. z-1≥0, z-2≥0으로, (z-1)+(z-2)=z이다.) - 웨이퍼에 형성한 포토레지스트층 상에 레지스트 보호막 재료에 의한 보호막을 형성하고, 노광을 행한 후 현상을 행하는 리소그래피에 의한 패턴 형성 방법에 있어서, 상기 레지스트 보호막 재료로서 제1항에 기재된 레지스트 보호막 재료를 이용하는 것을 특징으로 하는 패턴 형성 방법.
- 제7항에 있어서,
상기 노광이 진공 중에서 수행되는 것을 특징으로 하는 패턴 형성 방법. - 제8항에 있어서,
노광에서의 파장이 3~15nm의 범위 또는 노광에 전자선을 이용하는 것을 특징으로 하는 패턴 형성 방법. - 제7항 내지 제9항 중 어느 한 항에 있어서,
노광 후에 행하는 현상 공정에 있어서, 알칼리 현상액에 의해 포토레지스트층의 현상과 레지스트 보호막 재료의 보호막의 박리를 동시에 행하는 것을 특징으로 하는 패턴 형성 방법.
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