KR102428552B1 - 플라즈마 처리 방법 - Google Patents
플라즈마 처리 방법 Download PDFInfo
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- KR102428552B1 KR102428552B1 KR1020170064621A KR20170064621A KR102428552B1 KR 102428552 B1 KR102428552 B1 KR 102428552B1 KR 1020170064621 A KR1020170064621 A KR 1020170064621A KR 20170064621 A KR20170064621 A KR 20170064621A KR 102428552 B1 KR102428552 B1 KR 102428552B1
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Abstract
일 실시형태에 있어서의 방법(MT)에서는 처리 용기(12)와 실리콘의 전극판(34)을 구비하는 플라즈마 처리 장치(10)가 이용되고, 방법(MT)이 적용되는 웨이퍼(W)는 실리콘을 함유하는 피에칭층(EL)과 피에칭층(EL) 위에 마련되는 유기막(OL)과 유기막(OL) 위에 마련되는 반사 방지막(AL)을 구비한다. 방법(MT)에서는 처리 용기(12) 내에서 발생시킨 플라즈마를 이용하여 반사 방지막(AL) 및 유기막(OL)을 에칭한 후(공정 ST4 후)에 처리 용기(12) 내에서 산소 가스를 포함하는 혼합 가스의 플라즈마를 생성하는 공정 ST5를 실시한다. 공정 ST5에서는, 산소 가스의 플라즈마에 포함되는 산소 이온을 전극판(34)에 충돌시켜 전극판(34)의 표면에 산화 실리콘막(341)을 보호막으로서 형성한다.
Description
도 2는 (a)부, (b)부, (c)부 및 (d)부를 포함하고, 도 2의 (a)부는 도 1에 나타내는 방법의 적용 대상인 피처리체를 예시하는 단면도이며, 도 2의 (b)부~(d)부는 도 1에 나타내는 방법의 각 공정의 실시 후의 피처리체의 상태를 나타내는 단면도이다.
도 3은 도 1에 나타내는 방법의 실시에 이용하는 것이 가능한 플라즈마 처리 장치의 일례를 나타내는 도면이다.
도 4는 도 1에 나타내는 방법의 실시 중에 있어서의 처리 용기의 하나의 상태를 모식적으로 예시하는 도면이다.
도 5는 도 1에 나타내는 방법에 따라 발휘되는 효과를 설명하기 위한 실험 결과를 나타내는 도면이다.
12e : 배기구 12g : 반입출구
14 : 지지부 18a : 제1 플레이트
18b : 제2 플레이트 22 : 직류 전원
23 : 스위치 24 : 냉매 유로
26a : 배관 26b : 배관
28 : 가스 공급 라인 30 : 상부 전극
32 : 절연성 차폐 부재 34 : 전극판
34a : 가스 토출 구멍 341 : 산화 실리콘막
36 : 전극 지지체 36a : 가스 확산실
36b : 가스 통류 구멍 36c : 가스 도입구
38 : 가스 공급관 40 : 가스 소스군
42 : 밸브군 44 : 유량 제어기군
46 : 디포지션 실드 48 : 배기 플레이트
50 : 배기 장치 52 : 배기관
54 : 게이트 밸브 62 : 제1 고주파 전원
64 : 제2 고주파 전원 66 : 정합기
68 : 정합기 70 : 전원
AL : 반사 방지막 ALM : 마스크
SB : 기판 Cnt : 제어부
EL : 피에칭층 ESC : 정전 척
FR : 포커스 링 G1 : 실험 결과
G2 : 실험 결과 HP : 히터 전원
HT : 히터 KW : 폭
LE : 하부 전극 MK1 : 마스크
MK2 : 마스크 MK3 : 마스크
OL : 유기막 OLM : 마스크
PD : 배치대 Sp : 처리 공간
W : 웨이퍼 MT : 방법
Claims (4)
- 플라즈마 처리 장치를 이용하여 피처리체를 처리하는 플라즈마 처리 방법으로서, 상기 플라즈마 처리 장치는 처리 용기를 구비하며, 상기 피처리체는 실리콘을 함유하는 피에칭층과, 상기 피에칭층의 위에 마련되는 유기막과, 상기 유기막 위에 마련되는 반사 방지막과, 상기 반사 방지막 위에 마련되는 제1 마스크를 구비하고, 상기 방법은,
상기 처리 용기 내에서 제1 플라즈마를 생성하는 공정과,
상기 처리 용기 내에서 발생시킨 제1 플라즈마와 상기 제1 마스크를 이용하여 상기 반사 방지막을 에칭하는 공정으로서, 상기 반사 방지막으로부터 제2 마스크가 형성되는 것인 공정과,
상기 처리 용기 내에서 제2 플라즈마를 생성하는 공정과,
상기 처리 용기 내에서 발생시킨 제2 플라즈마와 상기 제2 마스크를 이용하여 상기 유기막을 에칭하는 공정으로서, 상기 유기막으로부터 제3 마스크가 형성되는 것인 공정과,
상기 처리 용기 내에서 제1 가스 및 제2 가스를 포함하는 혼합 가스의 제3 플라즈마를 생성하는 공정과,
상기 처리 용기 내에서 발생시킨 제3 플라즈마와 상기 제3 마스크를 이용하여 상기 피에칭층을 에칭하는 공정
을 포함하고,
상기 플라즈마 처리 장치는 상부 전극을 더 구비하며,
상기 상부 전극은, 상기 처리 용기 내에서 상기 피처리체를 지지하는 배치대의 상방에 마련되고,
상기 상부 전극의 전극판은 실리콘을 함유하며,
상기 제1 가스는 산소 가스이고,
상기 혼합 가스의 제3 플라즈마를 생성하는 상기 공정에서는, 상기 제1 가스의 플라즈마에 포함되는 산소 이온을 상기 전극판에 충돌시켜 상기 전극판의 표면에 산화 실리콘막을 형성하는 것인 방법. - 제1항에 있어서, 상기 혼합 가스의 제3 플라즈마를 생성하는 상기 공정에 있어서, 상기 제1 가스의 유량은 3 sccm~10 sccm의 범위인 것인 방법.
- 제1항 또는 제2항에 있어서, 상기 제2 가스는 아르곤 가스인 것인 방법.
- 제1항 또는 제2항에 있어서,
상기 반사 방지막은 산화 실리콘을 함유하고,
상기 혼합 가스의 제3 플라즈마를 생성하는 상기 공정에 있어서 형성되는 상기 산화 실리콘막의 막 두께는, 상기 피에칭층을 에칭하는 공정 후에 별도의 피처리체에 대하여 상기 반사 방지막을 에칭하는 상기 공정이 더 실시되는 경우에, 상기 반사 방지막을 에칭하는 상기 공정에 있어서 상기 산화 실리콘막이 제거되는 막 두께인 것인 방법.
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| US11404245B2 (en) * | 2018-02-28 | 2022-08-02 | Taiwan Semiconductor Manufacturing Co., Ltd. | DC bias in plasma process |
| JP7203531B2 (ja) * | 2018-08-08 | 2023-01-13 | 東京エレクトロン株式会社 | プラズマ処理方法及びプラズマ処理装置 |
| TWI730532B (zh) * | 2018-12-18 | 2021-06-11 | 大陸商北京北方華創微電子裝備有限公司 | 腔室進氣結構以及反應腔室 |
| JP7158308B2 (ja) * | 2019-02-14 | 2022-10-21 | 東京エレクトロン株式会社 | プラズマ処理装置及びプラズマ処理方法 |
| JP7190938B2 (ja) * | 2019-02-27 | 2022-12-16 | 東京エレクトロン株式会社 | プラズマ処理方法及びプラズマ処理装置 |
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| US7226869B2 (en) * | 2004-10-29 | 2007-06-05 | Lam Research Corporation | Methods for protecting silicon or silicon carbide electrode surfaces from morphological modification during plasma etch processing |
| JP5642001B2 (ja) * | 2011-03-25 | 2014-12-17 | 東京エレクトロン株式会社 | プラズマエッチング方法 |
| TWI670768B (zh) * | 2014-10-30 | 2019-09-01 | 日商日本瑞翁股份有限公司 | 電漿蝕刻方法 |
| US20160351799A1 (en) * | 2015-05-30 | 2016-12-01 | Applied Materials, Inc. | Hard mask for patterning magnetic tunnel junctions |
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| JP2004269983A (ja) | 2003-03-10 | 2004-09-30 | Seiko Epson Corp | 表面処理装置および表面処理方法 |
| JP2011192718A (ja) | 2010-03-12 | 2011-09-29 | Tokyo Electron Ltd | プラズマエッチング方法、プラズマエッチング装置及びコンピュータ記憶媒体 |
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| US20170345666A1 (en) | 2017-11-30 |
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| JP6637838B2 (ja) | 2020-01-29 |
| JP2017212357A (ja) | 2017-11-30 |
| KR20170134245A (ko) | 2017-12-06 |
| TWI743123B (zh) | 2021-10-21 |
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