KR101386552B1 - 플라즈마 처리 장치 및 방법과 플라즈마 에칭 처리 장치 및 방법 - Google Patents
플라즈마 처리 장치 및 방법과 플라즈마 에칭 처리 장치 및 방법 Download PDFInfo
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Abstract
(해결 수단) 처리 용기(2)에 도입된 처리 가스를 플라즈마화시켜 기판(W)을 처리하는 플라즈마 처리 장치(1)에 있어서, 처리 용기(2)에 수납된 기판(W)의 중심부에 도입되는 처리 가스의 도입량과, 처리 용기(2)에 수납된 기판(W)의 주변부에 도입되는 처리 가스의 도입량의 비가, 플라즈마 처리 중에 변화한다. 본 발명에 의하면, 기판(W)의 중심부와 주변부의 에칭 레이트(ER) 등의 편차를 작게 할 수 있다. 이 때문에, 기판(W) 표면에 있어서의 플라즈마 처리의 균일성이 향상된다.
Description
도 2는 도 1 중의 X-X 단면도로, 유전체창의 하면의 상태를 나타내고 있다.
도 3은 종래의 플라즈마 처리 장치에 있어서, 처리 가스가 도입되는 상태의 설명도이다.
도 4는 본 발명의 제1 실시 형태에 따른 플라즈마 처리 장치에 있어서, 처리 가스가 도입되는 상태의 설명도이다.
도 5는 본 발명의 제2 실시 형태에 따른 플라즈마 처리 장치의 개략적인 구성을 나타내는 종단면도이다.
도 6은 비교예 1에 있어서의 에칭 레이트의 분포를 나타내는 그래프이다.
도 7은 비교예 2에 있어서의 에칭 레이트의 분포를 나타내는 그래프이다.
도 8은 비교예 3에 있어서의 에칭 레이트의 분포를 나타내는 그래프이다.
도 9는 실시예 1에 있어서의 에칭 레이트의 분포를 나타내는 그래프이다.
도 10은 실시예 2에 있어서의 웨이퍼 표면의 SiN막의 에칭 형상을 나타내는 부분 확대 단면도이다.
도 11은 실시예 3에 있어서의 웨이퍼의 중심부의 처리 가스 도입량을 적게 하고, 웨이퍼의 주변부의 처리 가스 도입량을 많게 한 경우의, 웨이퍼 표면의 SiN막의 에칭 형상을 나타내는 부분 확대도이다.
도 12는 실시예 3에 있어서의 웨이퍼의 중심부의 처리 가스 도입량을 많게 하고, 웨이퍼의 주변부의 처리 가스 도입량을 적게 한 경우의, 웨이퍼 표면의 SiN막의 에칭 형상을 나타내는 부분 확대도이다.
[부호의 설명]
W : 웨이퍼
1 : 플라즈마 처리 장치
2 : 처리 용기
3 : 서셉터
4 : 외부 전원
5 : 히터
10 : 배기 장치
16 : 유전체창
20 : 래디얼 라인 슬롯판
25 : 유전체판
30 : 동축 도파관
31 : 내부 도체
32 : 외부 도체
35 : 마이크로파 공급 장치
36 : 직사각형 도파관
50, 50' : 가스 공급원
50a : Ar 가스 공급부
50b : HBr 가스 공급부
50c : O2 가스 공급부
50'a : Ar 가스 공급부
50'b : CF4 가스 공급부
50'c : CHF3 가스 공급부
51 : 스플리터
52, 53 : 공급로
55 : 중앙 도입부
56 : 주변 도입부
57 : 인젝터 블록
61 : 인젝터 링
65 : 제어부
Claims (21)
- 처리 용기에 도입된 처리 가스를 플라즈마화시켜 기판을 처리하는 플라즈마 처리 장치로서,
상기 처리 용기에 수납된 기판의 중심부에 처리 가스를 도입하는 중앙 도입부와,
상기 처리 용기에 수납된 기판의 주변부에 처리 가스를 도입하는 주변 도입부와,
상기 중앙 도입부와 상기 주변 도입부에 공급하는 처리 가스의 유량비를 가변하게 조절하는 스플리터와,
상기 스플리터를 제어하는 제어부
를 구비하고,
상기 제어부는, 플라즈마 처리 중에, 상기 중앙 도입부로부터의 처리 가스의 도입량과 상기 주변 도입부로부터의 처리 가스의 도입량의 비를 변화시키도록, 상기 스플리터를 제어하며,
상기 중앙 도입부로부터의 처리 가스의 도입량과, 상기 주변 도입부로부터의 처리 가스의 도입량의 비가, 제1 도입량과, 상기 제1 도입량비와는 상이한 제2 도입량비로 교대로 반복하여 전환되는 플라즈마 처리 장치. - 제1항에 있어서,
상기 제어부는, 플라즈마 처리 중에, 상기 중앙 도입부로부터의 처리 가스의 도입량과 상기 주변 도입부로부터의 처리 가스의 도입량의 비를, 제1 도입량비와, 상기 제1 도입량비와는 상이한 제2 도입량비로 교대로 전환하도록, 상기 스플리터를 제어하는 플라즈마 처리 장치. - 제1항에 있어서,
상기 중앙 도입부는, 상기 처리 용기의 천정면에 설치되고,
상기 주변 도입부는, 상기 처리 용기의 내측면에 설치되는 플라즈마 처리 장치. - 제1항에 있어서,
상기 처리 가스는, HBr을 포함하는 플라즈마 처리 장치. - 처리 용기에 도입된 처리 가스를 플라즈마화시켜 기판을 처리하는 플라즈마 처리 방법으로서,
상기 처리 용기에 수납된 기판의 중심부에 도입되는 처리 가스의 도입량과, 상기 처리 용기에 수납된 기판의 주변부에 도입되는 처리 가스의 도입량의 비가, 플라즈마 처리 중에 변화되며,
상기 처리 용기에 수납된 기판의 중심부에 도입되는 처리 가스의 도입량과, 상기 처리 용기에 수납된 기판의 주변부에 도입되는 처리 가스의 도입량의 비가, 제1 도입량과, 상기 제1 도입량비와는 상이한 제2 도입량비로 교대로 반복하여 전환되는 플라즈마 처리 방법. - 삭제
- 제5항에 있어서,
상기 처리 가스는, HBr을 포함하는 플라즈마 처리 방법. - 복수의 원료 가스가 혼합된 처리 가스가 처리 용기에 도입되고, 처리 용기 내에서 처리 가스가 플라즈마화되어 기판이 에칭 처리되는 플라즈마 에칭 처리 장치로서,
종류가 상이한 원료 가스를 공급하는 복수의 원료 가스 공급부와, 각 원료 가스 공급부에 의한 원료 가스의 공급량을 제어하는 제어부와,
상기 처리 용기에 수납된 기판의 중심부에 처리 가스를 도입하는 중앙 도입부와,
상기 처리 용기에 수납된 기판의 주변부에 처리 가스를 도입하는 주변 도입부와,
상기 중앙 도입부와 상기 주변 도입부에 공급하는 처리 가스의 유량비를 가변하게 조절하는 스플리터
를 구비하고,
상기 제어부는, 플라즈마 에칭 처리 중에, 상기 중앙 도입부로부터의 처리 가스의 도입량과 상기 주변 도입부로부터의 처리 가스의 도입량의 비를 변화시키도록, 상기 스플리터를 제어하며,
상기 주변 도입부는, 상기 중앙 도입부보다 플라즈마 전자 온도가 낮은 위치에 설치되는 플라즈마 에칭 처리 장치. - 삭제
- 제8항에 있어서,
상기 복수의 원료 가스 공급부는, CF4 가스를 공급하는 CF4 가스 공급부와, CHF3 가스를 공급하는 CHF3 가스 공급부를 포함하고,
상기 제어부는, 상기 CF4 가스 공급부에 의한 CF4의 공급량과 상기 CHF3 가스 공급부에 의한 CHF3 가스의 공급량을 제어하는 플라즈마 에칭 처리 장치. - 복수의 원료 가스가 혼합된 처리 가스가 처리 용기에 도입되고, 처리 용기 내에서 처리 가스가 플라즈마화되어 기판이 에칭 처리되는 플라즈마 에칭 처리 방법으로서,
상기 처리 용기에 수납된 기판의 중심부에 도입되는 처리 가스의 도입량과, 상기 처리 용기에 수납된 기판의 주변부에 도입되는 처리 가스의 도입량의 비가, 플라즈마 에칭 처리 중에 변화되며,
상기 기판의 주변부에 처리 가스를 도입하는 주변 도입부는, 상기 기판의 중심부에 처리 가스를 도입하는 중앙 도입부보다 플라즈마 전자 온도가 낮은 위치에 설치되는 플라즈마 에칭 처리 방법. - 삭제
- 제11항에 있어서,
상기 복수의 원료 가스는, CF4 가스와 CHF3 가스를 포함하고,
상기 CF4 가스의 공급량과 상기 CHF3 가스의 공급량이 제어되는 플라즈마 에칭 처리 방법. - 제1항 내지 제4항 중 어느 한 항에 있어서,
상기 주변 도입부는, 상기 중앙 도입부보다 플라즈마 전자 온도가 낮은 위치에 설치되는 플라즈마 처리 장치. - 제1항 내지 제4항 중 어느 한 항에 있어서,
상기 처리 가스는 상기 처리 용기의 상부를 통해 공급되는 마이크로파에 의해 플라즈마화되는 플라즈마 처리 장치. - 제5항 또는 제7항에 있어서,
상기 기판의 주변부에 처리 가스를 도입하는 주변 도입부는, 상기 기판의 중심부에 처리 가스를 도입하는 중앙 도입부보다 플라즈마 전자 온도가 낮은 위치에 설치되는 플라즈마 처리 방법. - 제5항 또는 제7항에 있어서,
상기 처리 가스는 상기 처리 용기의 상부를 통해 공급되는 마이크로파에 의해 플라즈마화되는 플라즈마 처리 방법. - 삭제
- 제8항 또는 제10항에 있어서,
상기 처리 가스는 상기 처리 용기의 상부를 통해 공급되는 마이크로파에 의해 플라즈마화되는 플라즈마 에칭 처리 장치. - 삭제
- 제11항 또는 제13항에 있어서,
상기 처리 가스는 상기 처리 용기의 상부를 통해 공급되는 마이크로파에 의해 플라즈마화되는 플라즈마 에칭 처리 방법.
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| JP2009191355A JP5410882B2 (ja) | 2009-08-20 | 2009-08-20 | プラズマエッチング処理装置とプラズマエッチング処理方法 |
| JPJP-P-2009-191355 | 2009-08-20 | ||
| PCT/JP2010/063543 WO2011021539A1 (ja) | 2009-08-20 | 2010-08-10 | プラズマ処理装置とプラズマ処理方法 |
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| CN102473634B (zh) | 2015-02-18 |
| KR20120037502A (ko) | 2012-04-19 |
| US20140262025A1 (en) | 2014-09-18 |
| TWI414017B (zh) | 2013-11-01 |
| WO2011021539A1 (ja) | 2011-02-24 |
| US8771537B2 (en) | 2014-07-08 |
| US10224220B2 (en) | 2019-03-05 |
| TW201137966A (en) | 2011-11-01 |
| US20120190208A1 (en) | 2012-07-26 |
| CN102473634A (zh) | 2012-05-23 |
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