KR20200000377A - 마이크로전자 공작물의 제조를 위해 실리콘 질화물층을 영역 선택 에칭하는 방법 - Google Patents
마이크로전자 공작물의 제조를 위해 실리콘 질화물층을 영역 선택 에칭하는 방법 Download PDFInfo
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- silicon nitride
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- 238000000034 method Methods 0.000 title claims abstract description 169
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 118
- 238000005530 etching Methods 0.000 title claims abstract description 34
- 238000004377 microelectronic Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title description 10
- 238000012545 processing Methods 0.000 claims abstract description 115
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 63
- 239000001257 hydrogen Substances 0.000 claims abstract description 62
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 61
- 239000011737 fluorine Substances 0.000 claims abstract description 61
- -1 hydrogen ions Chemical class 0.000 claims abstract description 61
- 230000007935 neutral effect Effects 0.000 claims abstract description 54
- 238000010884 ion-beam technique Methods 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims description 102
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 30
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000010703 silicon Substances 0.000 claims description 16
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 150000002431 hydrogen Chemical class 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 43
- 239000000463 material Substances 0.000 abstract description 26
- 150000002500 ions Chemical class 0.000 abstract description 20
- 238000004544 sputter deposition Methods 0.000 abstract description 2
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- 238000001459 lithography Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- 238000002408 directed self-assembly Methods 0.000 description 2
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- 239000010409 thin film Substances 0.000 description 2
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000002164 ion-beam lithography Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 1a는 실리콘 질화물층에 영역 선택 에칭이 수행되는 예시적인 실시예의 프로세스 흐름도이다.
도 1b는 도 1a에 도시한 영역 선택 에칭을 실시하는 데에 이용되는 예시적인 순차적 노출 프로세스 중에 실리콘 질화물층에 이루어지는 개질의 예시적인 실시예의 도면이다.
도 2a는 수소 이온 비임을 이용하여 실리콘 질화물층에 영역 선택 에칭이 수행되는 예시적인 실시예의 프로세스 흐름도이다.
도 2b는 도 2a에 도시한 영역 선택 에칭을 실시하는 데에 이용되는 예시적인 프로세스 단계들 중에 실리콘 질화물층에 이루어지는 개질의 예시적인 실시예의 도면이다.
도 3a는 수소 플라즈마와 불소 중성 비임을 이용하여 실리콘 질화물층에 영역 선택 에칭이 수행되는 예시적인 실시예의 프로세스 흐름도이다.
도 3b는 도 3a에 도시한 영역 선택 에칭을 실시하는 데에 이용되는 예시적인 프로세스 단계들 중에 실리콘 질화물층에 이루어지는 개질의 예시적인 실시예의 도면이다.
도 4a는 수소 이온 비임과 불소 중성 비임을 이용하여 실리콘 질화물층에 영역 선택 에칭이 수행되는 예시적인 실시예의 프로세스 흐름도이다.
도 4b는 도 4a에 도시한 영역 선택 에칭을 실시하는 데에 이용되는 예시적인 프로세스 단계들 중에 실리콘 질화물층에 이루어지는 개질의 예시적인 실시예의 도면이다.
도 5a는 수소 중성 비임과 불소 중성 비임을 이용하여 실리콘 질화물층에 영역 선택 에칭이 수행되는 예시적인 실시예의 프로세스 흐름도이다.
도 5b는 도 5a에 도시한 영역 선택 에칭을 실시하는 데에 이용되는 예시적인 프로세스 단계들 중에 실리콘 질화물층에 이루어지는 개질의 예시적인 실시예의 도면이다.
도 6은 본 명세서에서 설명하는 실시예들을 위해 에칭 챔버로서 이용될 수 있는 플라즈마 처리 장치 등의 공작물 제조 시스템을 위한 예시적인 실시예의 블록도이다.
단계 | 가스 | 가스비 | P | T | RF | 지속 시간 |
단계 1 | H2, Ar | 700H2/800Ar | 500mT | 15℃ | 15-100W | 5-60sec |
단계 1 | H2, Ar | 225H2 | 5mT | 15℃ | 25-100W | 5-60sec |
단계 2 | NF3, O2, Ar | ***O2/***NF3 /1000Ar |
500mT | 15℃ | 15-100W | 5-60sec |
Claims (20)
- 마이크로전자 공작물을 처리하는 방법으로서:
플라즈마 처리 챔버 내로 마이크로전자 공작물을 위한 기판을 전달하는 단계;
상기 기판에 형성된 실리콘 질화물층의 선택된 영역을 제거하기 위해 상기 실리콘 질화물층을 하나 이상의 이온 비임을 이용하여 수소 플라즈마 및 불소 플라즈마에 순차적으로 노출시키는 단계; 및
상기 플라즈마 처리 챔버로부터 상기 기판을 제거하는 단계
를 포함하는 방법. - 제1항에 있어서,
상기 실리콘 질화물층의 순차적 노출은 상기 실리콘 질화물층을 패터닝하기 위해 수행되는 것인 방법. - 제2항에 있어서,
상기 패터닝된 실리콘 질화물층은 제거 전에 하나 이상의 후속 처리 단계에서 하드 마스크로서 이용되는 것인 방법. - 제1항에 있어서,
상기 순차적 노출은 상기 실리콘 질화물층의 선택된 영역에 원하는 양의 에칭을 가하도록 반복되는 것인 방법. - 제1항에 있어서,
제1 플라즈마 가스를 이용하여 상기 수소 플라즈마를 생성하는 단계 및 제2 플라즈마 가스를 이용하여 상기 불소 플라즈마를 생성하는 단계를 더 포함하는 것인 방법. - 제5항에 있어서,
상기 제1 플라즈마 가스는 수소(H2)를 포함하는 것인 방법. - 제6항에 있어서,
상기 제1 플라즈마 가스는 아르곤(Ar)을 더 포함하는 것인 방법. - 제5항에 있어서,
상기 제2 플라즈마 가스는 산소(O2) 및 삼불화 질소(NF3)를 포함하는 것인 방법. - 제8항에 있어서,
O2 대 NF3의 비는 O2/NF3 > 4이도록 4보다 큰 비 또는 2 ≤ O2/NF3 ≤ 5이도록 2 내지 5의 비 중 적어도 하나인 것인 방법. - 제8항에 있어서,
상기 제1 플라즈마 가스는 아르곤(Ar)을 더 포함하는 것인 방법. - 제1항에 있어서,
상기 순차적 노출은,
수소 이온을 포함한 제1 플라즈마를 생성하도록 처리 챔버 내에서 제1 플라즈마 가스를 점화시키는 단계;
개질된 실리콘 질화물을 형성하도록 상기 실리콘 질화물층에 하나 이상의 비임으로 상기 수소 이온을 전달하는 단계;
불소 이온을 포함한 제2 플라즈마를 생성하도록 상기 처리 챔버 내에서 제2 플라즈마 가스를 점화시키는 단계; 및
상기 개질된 실리콘 질화물을 제거하도록 상기 실리콘 질화물층에 상기 제2 플라즈마를 전달하는 단계
를 포함하는 것인 방법. - 제1항에 있어서,
상기 순차적 노출은,
수소 이온을 포함한 제1 플라즈마를 생성하도록 처리 챔버 내에서 제1 플라즈마 가스를 점화시키는 단계;
개질된 실리콘 질화물을 형성하도록 상기 실리콘 질화물층에 상기 수소 이온을 전달하는 단계;
불소 이온을 포함한 제2 플라즈마를 생성하도록 상기 처리 챔버 내에서 제2 플라즈마 가스를 점화시키는 단계; 및
개질된 실리콘 질화물을 제거하도록 상기 실리콘 질화물층에 하나 이상의 중성 비임으로 상기 불소 이온을 전달하는 단계
를 포함하는 것인 방법. - 제12항에 있어서,
상기 하나 이상의 중성 비임을 형성하도록 상기 불소 이온을 그리드를 통과시키는 단계를 더 포함하는 것인 방법. - 제1항에 있어서,
상기 순차적 노출은,
수소 이온을 포함한 제1 플라즈마를 생성하도록 처리 챔버 내에서 제1 플라즈마 가스를 점화시키는 단계;
개질된 실리콘 질화물을 형성하도록 상기 실리콘 질화물층에 하나 이상의 비임으로 상기 수소 이온을 전달하는 단계;
불소 이온을 포함한 제2 플라즈마를 생성하도록 상기 처리 챔버 내에서 제2 플라즈마 가스를 점화시키는 단계; 및
개질된 실리콘 질화물을 제거하도록 상기 실리콘 질화물층에 하나 이상의 중성 비임으로 상기 불소 이온을 전달하는 단계
를 포함하는 것인 방법. - 제14항에 있어서,
상기 하나 이상의 중성 비임을 형성하도록 상기 불소 이온을 그리드를 통과시키는 단계를 더 포함하는 것인 방법. - 제1항에 있어서,
상기 순차적 노출은,
수소 이온을 포함한 제1 플라즈마를 생성하도록 처리 챔버 내에서 제1 플라즈마 가스를 점화시키는 단계;
개질된 실리콘 질화물을 형성하도록 실리콘 질화물층에 하나 이상의 중성 비임으로 상기 수소 이온을 전달하는 단계;
불소 이온을 포함한 제2 플라즈마를 생성하도록 상기 처리 챔버 내에서 제2 플라즈마 가스를 점화시키는 단계; 및
개질된 실리콘 질화물을 제거하도록 상기 실리콘 질화물층에 하나 이상의 중성 비임으로 상기 불소 이온을 전달하는 단계
를 포함하는 것인 방법. - 제16항에 있어서,
상기 하나 이상의 중성 비임을 형성하도록 상기 수소 이온을 그리드를 통과시키는 단계; 및 상기 하나 이상의 중성 비임을 형성하도록 상기 불소 이온을 그리드를 통과시키는 단계를 더 포함하는 것인 방법. - 제1항에 있어서,
상기 기판은 또한 실리콘층 또는 실리콘 산화물층 중 적어도 하나를 포함하는 것인 방법. - 제1항에 있어서,
상기 수소 플라즈마는 상기 실리콘 질화물층의 비등방성 에칭을 제공하도록 수소 이온을 포함하는 것인 방법. - 제1항에 있어서,
상기 수소 플라즈마는 상기 실리콘 질화물층의 등방성 에칭을 제공하도록 수소 라디칼을 포함하는 것인 방법.
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US20160035581A1 (en) * | 2012-12-28 | 2016-02-04 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Microelectronic method for etching a layer |
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US7977249B1 (en) * | 2007-03-07 | 2011-07-12 | Novellus Systems, Inc. | Methods for removing silicon nitride and other materials during fabrication of contacts |
US20160035581A1 (en) * | 2012-12-28 | 2016-02-04 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Microelectronic method for etching a layer |
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