KR101810970B1 - 에칭 방법 및 에칭 처리 장치 - Google Patents
에칭 방법 및 에칭 처리 장치 Download PDFInfo
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- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 130
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- 125000000123 silicon containing inorganic group Chemical group 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 1
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Abstract
Description
도 2는 동실시예의 에칭 공정을 실행하는 플라즈마 처리 장치의 단면도이다.
도 3은 동실시예의 에칭 공정에서의 프로세스 조건을 나타낸 표이다.
도 4는 동실시예의 에칭 공정에서 COS 유량을 제어한 경우의 마스크의 잔존 상태를 나타낸 도면이다.
도 5a 내지 도 5d는 동실시예의 에칭 공정에서의 COS 유량 제어와 에칭 레이트, 선택비 등과의 관계를 나타낸 그래프이다.
도 6은 동실시예의 에칭 공정에서 COS 유량 및 압력을 제어한 경우의 마스크의 잔존 상태를 나타낸 도면이다.
도 7a 내지 도 7c는 동실시예의 에칭 공정에서의 COS 유량 제어 및 압력 제어와 선택비, LWR 등과의 관계를 나타낸 그래프이다.
12 : Si - ARC
14 : ArF 레지스트막
100 : 에칭 처리 장치
105 : 처리실
110 : 상부 전극
115 : 하부 전극
120 : 가스 공급원
130 : 고주파 전원
Claims (13)
- 피에칭층 상에 무기 반사 방지막을 형성하는 공정과,
상기 무기 반사 방지막 상에 패턴화된 레지스트막을 형성하는 공정과,
상기 레지스트막을 마스크로 하고, CF4 가스와 COS 가스와 O2 가스를 포함하는 에칭 가스를 처리실 내로 도입하고, 도입된 에칭 가스를 이용하여 상기 무기 반사 방지막을 에칭함으로써 상기 무기 반사 방지막에 원하는 패턴을 형성하는 공정
을 포함하는 에칭 방법에 있어서,
상기 COS 가스가 상기 무기 반사 방지막의 에칭면의 코팅에 사용되고, 상기 O2 가스가 상기 COS 가스에 의한 상기 코팅의 억제에 사용되고,
상기 COS 가스의 유량을 증가시킴으로써, 상기 레지스트막과 상기 무기 반사 방지막 간의 선택비를 향상시키되, 상기 에칭 가스에 포함되는 COS 가스의 유량 및 O2 가스의 유량은 비례하도록 제어됨으로써, 상기 COS 가스에 의한 코팅과 상기 O2 가스에 의한 코팅의 억제의 밸런스가 유지되는 것을 특징으로 하는 에칭 방법. - 제 1 항에 있어서,
상기 레지스트막은 ArF 레지스트막인 것을 특징으로 하는 에칭 방법.
- 제 1 항 또는 제 2 항에 있어서,
상기 무기 반사 방지막은 실리콘을 함유하는 것을 특징으로 하는 에칭 방법. - 제 1 항에 있어서,
상기 에칭 가스에 포함되는 COS 가스의 유량은 10 ~ 35 sccm인 것을 특징으로 하는 에칭 방법. - 제 1 항에 있어서,
상기 에칭 가스에 포함되는 CF4 가스의 유량은 50 ~ 300 sccm의 범위 내인 것을 특징으로 하는 에칭 방법. - 제 1 항에 있어서,
상기 에칭 가스에 포함되는 O2 가스의 유량의 상한은 100 sccm인 것을 특징으로 하는 에칭 방법. - 삭제
- 제 1 항에 있어서,
상기 COS 가스의 유량과 상기 O2 가스의 유량의 유량비가 일정해지도록 제어하는 것을 특징으로 하는 에칭 방법. - 제 1 항 또는 제 2 항에 있어서,
상기 처리실 내의 압력은 30 ~ 100 mT의 범위 내인 것을 특징으로 하는 에칭 방법. - CF4 가스와 COS 가스와 O2 가스를 포함하는 에칭 가스를 처리실로 공급하는 가스 공급원과,
상기 처리실로 원하는 고주파 전력을 공급하는 고주파 전원을 구비하고,
고주파 전력을 이용하여 상기 에칭 가스로부터 플라즈마를 생성하고, 상기 플라즈마에 의해 무기 반사 방지막 및 패턴화된 레지스트막이 형성된 피처리체에 대하여 에칭 처리를 실시함으로써 상기 무기 반사 방지막에 원하는 패턴을 형성하는 에칭 처리 장치에 있어서,
상기 COS 가스가 상기 무기 반사 방지막의 에칭면의 코팅에 사용되고, 상기 O2 가스가 상기 COS 가스에 의한 상기 코팅의 억제에 사용되며,
상기 COS 가스의 유량을 증가시킴으로써, 상기 레지스트막과 상기 무기 반사 방지막 간의 선택비를 향상시키되, 상기 에칭 가스에 포함되는 COS 가스의 유량 및 O2 가스의 유량은 비례하도록 제어됨으로써, 상기 COS 가스에 의한 코팅과 상기 O2 가스에 의한 코팅의 억제의 밸런스가 유지되는 것을 특징으로 하는 에칭 처리 장치. - 기판 상에 무기 반사 방지막과 패턴화된 레지스트막이 순차로 형성되고, 처리실 내에서 상기 레지스트막을 마스크로 하여 상기 무기 반사 방지막을 에칭하는 방법에 있어서,
상기 처리실 내에 CF4 가스와 COS 가스와 O2 가스를 포함하는 에칭 가스를 도입하는 공정과,
상기 CF4 가스와 상기 COS 가스와 상기 O2 가스를 포함하는 에칭 가스의 플라즈마를 생성하는 공정과,
상기 CF4 가스와 상기 COS 가스와 상기 O2 가스를 포함하는 에칭 가스의 플라즈마에 의해 상기 레지스트막을 마스크로 하여 상기 무기 반사 방지막을 에칭함으로써 상기 무기 반사 방지막에 원하는 패턴을 형성하는 공정
을 포함하고,
상기 COS 가스가 상기 무기 반사 방지막의 에칭면의 코팅에 사용되고, 상기 O2 가스가 상기 COS 가스에 의한 상기 코팅의 억제에 사용되며,
상기 COS 가스의 유량을 증가시킴으로써, 상기 레지스트막과 상기 무기 반사 방지막 간의 선택비를 향상시키되, 상기 에칭 가스에 포함되는 COS 가스의 유량 및 O2 가스의 유량은 비례하도록 제어됨으로써, 상기 COS 가스에 의한 코팅과 상기 O2 가스에 의한 코팅의 억제의 밸런스가 유지되는 것을 특징으로 하는 에칭 방법. - 삭제
- 삭제
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JP2009293094A JP5606060B2 (ja) | 2009-12-24 | 2009-12-24 | エッチング方法及びエッチング処理装置 |
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JP2013222852A (ja) | 2012-04-17 | 2013-10-28 | Tokyo Electron Ltd | 有機膜をエッチングする方法及びプラズマエッチング装置 |
JP6817692B2 (ja) * | 2015-08-27 | 2021-01-20 | 東京エレクトロン株式会社 | プラズマ処理方法 |
JP2017092376A (ja) | 2015-11-16 | 2017-05-25 | 東京エレクトロン株式会社 | エッチング方法 |
JP6820206B2 (ja) * | 2017-01-24 | 2021-01-27 | 東京エレクトロン株式会社 | 被加工物を処理する方法 |
KR102372892B1 (ko) | 2017-08-10 | 2022-03-10 | 삼성전자주식회사 | 집적회로 소자의 제조 방법 |
JP7229033B2 (ja) * | 2019-02-01 | 2023-02-27 | 東京エレクトロン株式会社 | 基板処理方法及び基板処理装置 |
CN111679454B (zh) * | 2020-06-19 | 2023-07-07 | 联合微电子中心有限责任公司 | 半导体器件的制备方法 |
JP2023123307A (ja) * | 2022-02-24 | 2023-09-05 | 株式会社トリケミカル研究所 | 膜製造方法 |
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US20090087996A1 (en) * | 2007-09-27 | 2009-04-02 | Lam Research Corporation | Line width roughness control with arc layer open |
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US20110159697A1 (en) | 2011-06-30 |
KR20110074455A (ko) | 2011-06-30 |
TW201137971A (en) | 2011-11-01 |
JP5606060B2 (ja) | 2014-10-15 |
JP2011134896A (ja) | 2011-07-07 |
CN102129983A (zh) | 2011-07-20 |
TWI503885B (zh) | 2015-10-11 |
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US8283254B2 (en) | 2012-10-09 |
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