KR101861403B1 - 하층막 재료 및 패턴 형성 방법 - Google Patents
하층막 재료 및 패턴 형성 방법 Download PDFInfo
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- KR101861403B1 KR101861403B1 KR1020140070002A KR20140070002A KR101861403B1 KR 101861403 B1 KR101861403 B1 KR 101861403B1 KR 1020140070002 A KR1020140070002 A KR 1020140070002A KR 20140070002 A KR20140070002 A KR 20140070002A KR 101861403 B1 KR101861403 B1 KR 101861403B1
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- 238000000034 method Methods 0.000 title claims description 51
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- 125000000217 alkyl group Chemical group 0.000 claims abstract description 15
- 238000001459 lithography Methods 0.000 claims abstract description 14
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Abstract
(R1은 수소 원자, 산 불안정기, 글리시딜기, 또는 알킬기, 아실기, 알콕시카르보닐기, R2는 수소 원자, 알킬기, 알케닐기 또는 아릴기, R3은 수소 원자, 알킬기, 알케닐기 또는 아릴기, X는 메틸렌기, 에틸렌기, 에티닐렌기, -S- 또는 -NH-, m, n은 1 또는 2)
본 발명의 레지스트 하층막 재료의 히드록시쿠마린의 반복 단위를 갖는 노볼락 수지는, 알칼리수에 의해 가수분해되어 히드록시신남산으로 됨으로써 카르복실기가 발생하여, 알칼리 수용액에 가용으로 된다. 이에 의해, 이온을 주입한 Si 기판이나 SiO2 기판에 대미지를 입히지 않고 박리하는 것이 가능해진다.
Description
도 2는 도 1에 이어, 본 발명의 패턴 형성 방법을 설명하는 단면도이며, (E)는 PEB, 알칼리 현상한 상태, (F)는 H2 가스에 의해 규소 함유 중간막을 마스크로 하여 탄화수소 하층막을 가공한 상태, (G)는 탄화수소 하층막을 마스크로 하여 이온을 주입한 상태, (H)는 규소 함유 중간막과 탄화수소 하층막을 박리한 상태를 나타낸다.
10b 이온이 주입된 기판의 영역
20 탄화수소 하층막
30 규소 함유 중간막
40 레지스트막
Claims (11)
- 리소그래피에서 사용되는 포토레지스트 하층막 재료로서, 하기 화학식 (1)로 표시되는 반복 단위를 갖는 노볼락 수지를 함유하는 것을 특징으로 하는 하층막 재료.
(화학식 중, R1은 수소 원자, 산 불안정기, 글리시딜기, 탄소수 1 내지 10의 직쇄상 알킬기, 탄소수 3 내지 10의 분지상 또는 환상의 알킬기, 아실기 또는 알콕시카르보닐기이며, R2는 수소 원자, 탄소수 1 내지 10의 직쇄상 알킬기, 탄소수 3 내지 10의 분지상 또는 환상의 알킬기, 탄소수 2 내지 10의 알케닐기, 또는 탄소수 6 내지 10의 아릴기이며, 히드록시기, 알콕시기, 아실옥시기, 에테르기, 술피드기 또는 할로겐 원자를 갖고 있을 수도 있거나, 또는 할로겐 원자, 히드록시기, 아실기, 카르복실기, 아실옥시기, 알콕시카르보닐기, 시아노기, 또는 탄소수 1 내지 4의 알콕시기일 수도 있고, R3은 수소 원자, 탄소수 1 내지 6의 직쇄상 알킬기, 탄소수 3 내지 6의 분지상 또는 환상의 알킬기, 탄소수 2 내지 10의 직쇄상 알케닐기, 탄소수 3 내지 10의 분지상 또는 환상의 알케닐기, 또는 탄소수 6 내지 12의 아릴기이며, 히드록시기, 알콕시기, 에테르기, 티오에테르기, 카르복실기, 알콕시카르보닐기, 아실옥시기, 또는 -COOR 또는 -OR기(R은 락톤환, 산 불안정기 또는 -R'-COOR"이고, R'는 단결합 또는 알킬렌기, R"는 산 불안정기를 나타냄)를 가질 수도 있고, X는 메틸렌기, 에틸렌기, 에티닐렌기, -S- 또는 -NH-이며, m, n은 1 또는 2임) - 제1항에 있어서, 화학식 (1)의 치환 또는 비치환된 반복 단위를 갖는 노볼락 수지에 더하여 유기 용제를 함유하는 하층막 재료.
- 제2항에 있어서. 산 발생제 또는 가교제 또는 둘 다를 더 함유하는 하층막 재료.
- 리소그래피에 의해 기판에 패턴을 형성하는 방법으로서, 기판 상에 제1항 내지 제3항 중 어느 한 항에 기재된 하층막 재료를 기판 상에 형성하고, 해당 하층막 상에 포토레지스트막을 형성하여 노광과 현상에 의해 패턴을 형성한 후에, 포토레지스트 패턴을 마스크로 하여 하층막과 기판을 가공하는 것을 특징으로 하는 패턴 형성 방법.
- 리소그래피에 의해 기판에 패턴을 형성하는 방법으로서, 기판 상에 제1항 내지 제3항 중 어느 한 항에 기재된 하층막 재료를 기판 상에 형성하고, 해당 하층막 상에 포토레지스트막을 형성하여 노광과 현상에 의해 패턴을 형성한 후에, 포토레지스트 패턴을 마스크로 하여 하층막을 가공하고, 기판에 이온을 주입하는 것을 특징으로 하는 패턴 형성 방법.
- 리소그래피에 의해 기판에 패턴을 형성하는 방법으로서, 기판 상에 제1항 내지 제3항 중 어느 한 항에 기재된 하층막 재료를 기판 상에 형성하고, 해당 하층막 상에 규소 함유 중간막을 형성하고, 그 위에 포토레지스트막을 형성하여 노광과 현상에 의해 패턴을 형성한 후에, 포토레지스트 패턴을 마스크로 하여 규소 함유 중간막을 가공하고, 규소 함유 중간막을 마스크로 하여 하층막을 가공하고, 하층막을 마스크로 하여 기판을 가공하는 것을 특징으로 하는 패턴 형성 방법.
- 리소그래피에 의해 기판에 패턴을 형성하는 방법으로서, 기판 상에 제1항 내지 제3항 중 어느 한 항에 기재된 하층막 재료를 기판 상에 형성하고, 해당 하층막 상에 규소 함유 중간막을 형성하고, 그 위에 포토레지스트막을 형성하여 노광과 현상에 의해 패턴을 형성한 후에, 포토레지스트 패턴을 마스크로 하여 규소 함유 중간막을 가공하고, 규소 함유 중간막을 마스크로 하여 하층막을 가공하고, 하층막을 마스크로 하여 기판에 이온을 주입하는 것을 특징으로 하는 패턴 형성 방법.
- 제4항에 있어서, 기판을 가공하기 전 또는 후에, 알칼리수에 의해 하층막을 박리하는 것을 특징으로 하는 패턴 형성 방법.
- 제5항에 있어서, 이온의 주입을 행한 후에, 알칼리수에 의해 하층막을 박리하는 것을 특징으로 하는 패턴 형성 방법.
- 제5항에 있어서, 이온의 주입을 행한 후에, pH가 9 이상인 알칼리수에 의해 하층막을 박리하는 것을 특징으로 하는 패턴 형성 방법.
- 제8항에 있어서, 알칼리수가 암모니아, 암모니아와 과산화수소수와 물의 혼합에 의한 암모니아과수, 테트라메틸암모늄히드록시드, 테트라에틸암모늄히드록시드, 테트라프로필암모늄히드록시드, 테트라부틸암모늄히드록시드, 콜린히드록시드, 벤질트리메틸암모늄히드록시드, 벤질트리에틸암모늄히드록시드, DBU, DBN, 히드록실아민, 1-부틸-1-메틸피롤리디늄히드록시드, 1-프로필-1-메틸피롤리디늄히드록시드, 1-부틸-1-메틸피페리디늄히드록시드, 1-프로필-1-메틸피페리디늄히드록시드, 메피쿼트히드록시드, 트리메틸술포늄히드록시드, 히드라진류, 에틸렌디아민류 또는 구아니딘류로부터 선택되는 1종 이상을 1 내지 99질량%의 범위로 함유하는 패턴 형성 방법.
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