KR101810805B1 - 마스크 블랭크, 위상 시프트 마스크, 위상 시프트 마스크의 제조 방법 및 반도체 디바이스의 제조 방법 - Google Patents
마스크 블랭크, 위상 시프트 마스크, 위상 시프트 마스크의 제조 방법 및 반도체 디바이스의 제조 방법 Download PDFInfo
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Abstract
위상 시프트막은, ArF 엑시머 레이저의 노광광을 2% 이상 10% 미만의 투과율로 투과시키는 기능과, 위상 시프트막을 투과한 상기 노광광에 대하여 위상 시프트막의 두께와 동일한 거리 공기 중을 통과한 상기 노광광 사이에서 150도 이상 190도 이하의 위상차를 발생시키는 기능을 갖고, 위상 시프트막은 하층과 상층이 적층된 구조를 포함하고, 하층은 금속 및 규소를 함유하고, 산소를 실질적으로 함유하지 않는 재료로 형성되고, 상층은 금속, 규소, 질소 및 산소를 함유하는 재료로 형성되고, 하층의 두께는 상층보다 얇고, 상층의 금속 및 규소의 합계 함유량에 대한 금속의 함유량의 비율은, 하층보다 작다.
Description
도 2는 본 발명의 실시 형태에 있어서의 위상 시프트 마스크의 제조 공정을 도시하는 단면 모식도이다.
2 : 위상 시프트막
21 : 하층
22 : 상층
2a : 위상 시프트 패턴
3 : 차광막
3a, 3b : 차광 패턴
4 : 하드 마스크막
4a : 하드 마스크 패턴
5a : 제1 레지스트 패턴
6b : 제2 레지스트 패턴
100 : 마스크 블랭크
200 : 위상 시프트 마스크
Claims (15)
- 투광성 기판 위에 위상 시프트막을 구비한 마스크 블랭크이며,
상기 위상 시프트막은, ArF 엑시머 레이저의 노광광을 2% 이상 10% 미만의 투과율로 투과시키는 기능과, 상기 위상 시프트막을 투과한 상기 노광광에 대하여 상기 위상 시프트막의 두께와 동일한 거리만큼 공기 중을 통과한 상기 노광광 사이에서 150도 이상 190도 이하의 위상차를 발생시키는 기능을 갖고,
상기 위상 시프트막은, 상기 투광성 기판측으로부터 하층과 상층이 적층된 구조를 포함하고,
상기 하층은, 금속 및 규소를 함유하고, 산소의 함유량이 5원자% 이하인 재료로 형성되고,
상기 상층은, 금속, 규소, 질소 및 산소를 함유하는 재료로 형성되고, 상기 상층을 형성하는 재료의 산소 함유량은 5원자% 이상 30원자% 이하이고,
상기 하층의 두께는, 상기 상층의 두께보다 얇고,
상기 상층은, 상기 금속 및 규소의 합계 함유량에 대한 상기 금속의 함유량의 비율이 2% 이상 7% 이하이며,
상기 하층은, 상기 금속 및 규소의 합계 함유량에 대한 상기 금속의 함유량의 비율이 8% 이상 20% 이하이고,
상기 하층을 형성하는 재료와 상기 상층을 형성하는 재료는 동일한 금속을 함유하고 있는 것을 특징으로 하는 마스크 블랭크. - 제1항에 있어서,
상기 하층은, 상기 투광성 기판의 표면에 접해서 형성되어 있는 것을 특징으로 하는 마스크 블랭크. - 제1항에 있어서,
상기 하층은, 금속 및 규소를 포함하는 재료로 형성되어 있는 것을 특징으로 하는 마스크 블랭크. - 제1항에 있어서,
상기 위상 시프트막은, 두께가 90㎚ 이하인 것을 특징으로 하는 마스크 블랭크. - 제1항에 있어서,
상기 하층은, 두께가 2㎚ 이상인 것을 특징으로 하는 마스크 블랭크. - 제1항에 있어서,
상기 상층은, 표층에 그 표층을 제외한 부분의 상층보다 산소 함유량이 많은 층을 갖는 것을 특징으로 하는 마스크 블랭크. - 제1항 내지 제6항 중 어느 한 항에 있어서,
상기 위상 시프트막 위에 차광막을 구비하는 것을 특징으로 하는 마스크 블랭크. - 제7항에 기재된 마스크 블랭크의 상기 위상 시프트막에 전사 패턴이 형성되고, 상기 차광막에 차광대 패턴을 포함하는 패턴이 형성되어 있는 것을 특징으로 하는 위상 시프트 마스크.
- 제7항에 기재된 마스크 블랭크를 사용한 위상 시프트 마스크의 제조 방법이며,
건식 에칭에 의해 상기 차광막에 전사 패턴을 형성하는 공정과,
상기 전사 패턴을 갖는 차광막을 마스크로 하는 건식 에칭에 의해 상기 위상 시프트막에 전사 패턴을 형성하는 공정과,
차광대 패턴을 포함하는 패턴을 갖는 레지스트막을 마스크로 하는 건식 에칭에 의해 상기 차광막에 차광대 패턴을 포함하는 패턴을 형성하는 공정
을 구비하는 것을 특징으로 하는 위상 시프트 마스크의 제조 방법. - 제8항에 기재된 위상 시프트 마스크를 사용하여, 반도체 기판 위의 레지스트막에 전사 패턴을 노광 전사하는 공정을 구비하는 것을 특징으로 하는 반도체 디바이스의 제조 방법.
- 제9항에 기재된 위상 시프트 마스크의 제조 방법에 의해 제조된 위상 시프트 마스크를 사용하여, 반도체 기판 위의 레지스트막에 전사 패턴을 노광 전사하는 공정을 구비하는 것을 특징으로 하는 반도체 디바이스의 제조 방법.
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| TWI648592B (zh) | 2019-01-21 |
| KR20170089836A (ko) | 2017-08-04 |
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| TWI584056B (zh) | 2017-05-21 |
| KR20160094999A (ko) | 2016-08-10 |
| US10551734B2 (en) | 2020-02-04 |
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| US10146123B2 (en) | 2018-12-04 |
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| JP6599281B2 (ja) | 2019-10-30 |
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