KR20150064672A - 전사용 마스크의 제조 방법 및 현상액 - Google Patents
전사용 마스크의 제조 방법 및 현상액 Download PDFInfo
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- KR20150064672A KR20150064672A KR1020140167114A KR20140167114A KR20150064672A KR 20150064672 A KR20150064672 A KR 20150064672A KR 1020140167114 A KR1020140167114 A KR 1020140167114A KR 20140167114 A KR20140167114 A KR 20140167114A KR 20150064672 A KR20150064672 A KR 20150064672A
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- Prior art keywords
- solvent
- resist
- film
- pattern
- boiling point
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- 238000012546 transfer Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000002904 solvent Substances 0.000 claims abstract description 277
- 239000010408 film Substances 0.000 claims abstract description 194
- 238000009835 boiling Methods 0.000 claims abstract description 66
- 238000000034 method Methods 0.000 claims abstract description 61
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 8
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Abstract
Description
도 2는 본 실시예에 있어서, 횡축을 노광 강도(DOSE량), 종축을 잔막률로 한 경우의 결과를 나타내는 그래프이다.
도 3은 실시예[도 3의 (a)] 및 비교예[도 3의 (b)]에서 레지스트 패턴을 확대한 모습을 나타내는 전자 현미경 사진이다.
5 : 마스크 블랭크
10 : 기판
11 : 박막
12 : 레지스트막
50 : 전사용 마스크
Claims (11)
- 전사용 마스크의 제조 방법으로서,
박막을 갖는 기판을 준비하는 공정과,
상기 박막의 표면에 레지스트막을 형성하는 공정과,
상기 레지스트막을 노광하는 공정과,
노광 후의 상기 레지스트막에 대해 현상하는 공정을 행함으로써 레지스트 패턴을 형성하는 공정과,
상기 레지스트 패턴을 마스크로 하여 상기 박막을 에칭하는 공정
이 포함되어 있고,
상기 레지스트 패턴을 형성하는 공정에서,
상기 레지스트막은, 화학 증폭형이면서 네가티브형인 레지스트액에 의해 형성된 레지스트막이며,
상기 현상하는 공정을 행할 때에 사용하는 현상액은, 유기 용매인 용매 A 및 용매 B와, 유기 용매이며 상기 용매 A 및 상기 용매 B에 비해 상기 레지스트막을 용해하기 어려운 용매 C가 포함되어 있고, 상기 용매 A의 비점은 상기 용매 C보다 높고, 상기 용매 C의 비점은 상기 용매 B보다도 높은 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 용매 A 및 상기 용매 B의, 상기 레지스트막에 대한 용해 속도는 23℃에서 10㎚/sec 이상이며,
상기 용매 C의, 상기 레지스트막에 대한 용해 속도는 23℃에서 0.5㎚/sec 이하인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 용매 B는 상기 용매 A보다도, 상기 레지스트막에 대한 용해 속도가 빠른 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 현상액에 있어서의 상기 용매 A의 체적분율은 5% 이상 10% 이하인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 용매 A의 비점은 140℃ 이상 250℃ 이하인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 용매 A 및 상기 용매 B 중 적어도 1종이, 상기 레지스트액을 구성하는 용매 중 적어도 1종과 동종인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 현상액에 있어서의 상기 용매 C의 체적분율은 30% 이상인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 현상액에 있어서의 상기 용매 C의 체적분율은 50% 이상인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제1항에 있어서,
상기 박막을 에칭하는 공정에서는 반응성 가스를 에천트로 한 드라이 에칭을 행하고, 상기 반응성 가스에는 등방성의 에칭 가스가 포함되는 것을 특징으로 하는 전사용 마스크의 제조 방법. - 제9항에 있어서,
상기 박막의 표층 조성에 크롬이 포함되어 있고, 상기 반응성 가스는 적어도 산소와 염소를 포함하는 혼합 가스인 것을 특징으로 하는 전사용 마스크의 제조 방법. - 화학 증폭형이면서 네가티브형인 레지스트액에 의해 형성된 레지스트막으로부터 레지스트 패턴을 형성하는 데 수반하여 현상 공정을 행할 때에 사용되는 현상액으로서,
상기 현상액은, 유기 용매인 용매 A 및 용매 B와, 유기 용매이며 상기 용매 A 및 상기 용매 B에 비해 상기 레지스트막을 용해하기 어려운 용매 C를 포함하고 있고,
상기 용매 A의 비점은 상기 용매 C보다 높고, 상기 용매 C의 비점은 상기 용매 B보다도 높은 것을 특징으로 하는 현상액.
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