KR102445499B1 - 레지스트 패턴 형성 방법, 레지스트 패턴 스플릿제, 스플릿 패턴 개선화제, 레지스트 패턴 스플릿 재료, 및 스플릿 패턴 형성용의 포지티브형 레지스트 조성물 - Google Patents
레지스트 패턴 형성 방법, 레지스트 패턴 스플릿제, 스플릿 패턴 개선화제, 레지스트 패턴 스플릿 재료, 및 스플릿 패턴 형성용의 포지티브형 레지스트 조성물 Download PDFInfo
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- KR102445499B1 KR102445499B1 KR1020150135725A KR20150135725A KR102445499B1 KR 102445499 B1 KR102445499 B1 KR 102445499B1 KR 1020150135725 A KR1020150135725 A KR 1020150135725A KR 20150135725 A KR20150135725 A KR 20150135725A KR 102445499 B1 KR102445499 B1 KR 102445499B1
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Images
Classifications
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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- G—PHYSICS
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0035—Multiple processes, e.g. applying a further resist layer on an already in a previously step, processed pattern or textured surface
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C321/00—Thiols, sulfides, hydropolysulfides or polysulfides
- C07C321/24—Thiols, sulfides, hydropolysulfides, or polysulfides having thio groups bound to carbon atoms of six-membered aromatic rings
- C07C321/28—Sulfides, hydropolysulfides, or polysulfides having thio groups bound to carbon atoms of six-membered aromatic rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/79—Acids; Esters
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
- C07D295/14—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D295/155—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals with the ring nitrogen atoms and the carbon atoms with three bonds to hetero atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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Abstract
Description
도 2 는, 본 발명의 레지스트 패턴 형성 방법 (II) 의 개략 공정의 일례를 나타내는 도면이다.
도 3 은, 본 발명의 레지스트 패턴 형성 방법 (III) 의 실시 형태 3-1 의 개략 공정을 나타내는 도면이다.
도 4 는, 본 발명의 레지스트 패턴 형성 방법 (III) 의 실시 형태 3-2 의 개략 공정을 나타내는 도면이다.
2 : 제 1 레지스트 패턴
3 : 제 1 층
4 : 용제로 이루어지는 용액
2a : 유기 용제에 대한 용해성이 감소된 영역
2b : 유기 용제에 대해 용해성을 갖는 영역
1' : 기판
1P' : 제 1 레지스트 패턴
2' : 제 1 층
B1' : 층
1Pa' : 현상액 불용성 영역
1Pb' : 유기 용제에 대해, 용해성을 갖는 영역
3' : 패턴 반전막
3P' : 제 3 패턴
1” : 지지체
1P” : 제 1 레지스트 패턴
2” : 제 1 층
3” : 구조체
B1” : 층
1Pa” : 유기 현상액 불용성 영역
1Pb” : 유기 현상액 가용성 영역
Claims (19)
- 지지체 상에, 포지티브형 레지스트 조성물을 도포하여 포지티브형 레지스트막을 형성하고, 상기 포지티브형 레지스트막을 노광하고, 알칼리 현상하여, 제 1 레지스트 패턴을 형성하는 공정 A 와,
상기 제 1 레지스트 패턴이 형성된 상기 지지체 상에, 상기 제 1 레지스트 패턴을 피복하도록, 산 또는 열산 발생제를 함유하는 용액을 도포하고, 상기 제 1 레지스트 패턴과 이것을 피복하는 제 1 층을 포함하는 구조체를 얻는 공정 B 와,
상기 구조체를 피복하도록, 용제를 함유하는 용액을 도포하는 공정 B1 과,
상기 공정 B1 후의 상기 구조체를 가열하여, 상기의 산 또는 열산 발생제로부터 발생하는 산의 작용에 의해 상기 제 1 레지스트 패턴의 유기 용제에 대한 용해성을 변화시키는 공정 C 와,
상기 가열 후의 구조체를 유기 용제 현상하고, 상기 제 1 레지스트 패턴의 유기 용제에 대한 용해성이 변화된 영역 이외의 영역을 제거하여, 제 2 레지스트 패턴을 형성하는 공정 D 를 갖는 것을 특징으로 하는, 레지스트 패턴 형성 방법. - 삭제
- 제 1 항에 있어서,
상기 용제를 함유하는 용액은, 추가로 산 확산 제어제를 함유하는 용액인 레지스트 패턴 형성 방법. - 제 3 항에 있어서,
상기 산 확산 제어제가, 함질소 유기 화합물을 함유하는 레지스트 패턴 형성 방법. - 제 3 항에 있어서,
상기 산 확산 제어제를 함유하는 용액이, 산 비해리성 고리형 기를 포함하는 구성 단위 (a4) 를 갖는 레지스트 패턴 형성 방법. - 제 3 항에 있어서,
상기 산 확산 제어제를 함유하는 용액이, 저극성 용제를 함유하는 레지스트 패턴 형성 방법. - 제 1 항에 있어서,
지지체 상에, 포지티브형 레지스트 조성물을 도포하여 포지티브형 레지스트막을 형성하고, 상기 포지티브형 레지스트막을 노광하고, 알칼리 현상하여, 제 1 레지스트 패턴을 형성하는 공정 A 와,
상기 제 1 레지스트 패턴이 형성된 상기 지지체 상에, 상기 제 1 레지스트 패턴을 피복하도록, 산 또는 열산 발생제를 함유하는 용액을 도포하고, 상기 제 1 레지스트 패턴과 이것을 피복하는 제 1 층을 포함하는 구조체를 얻는 공정 B 와,
상기 구조체를 피복하도록, 용제를 함유하는 용액을 도포하는 공정 B1 과,
상기 공정 B1 후의 상기 구조체를 가열하여, 상기의 산 또는 열산 발생제로부터 발생하는 산의 작용에 의해 상기 제 1 레지스트 패턴의 유기 용제에 대한 용해성을 변화시키는 공정 C 와,
상기 가열 후의 구조체를 유기 용제 현상하고, 상기 제 1 레지스트 패턴의 유기 용제에 대한 용해성이 변화된 영역 이외의 영역을 제거하여, 제 2 레지스트 패턴을 형성하는 공정 D 와,
상기 제 2 레지스트 패턴을 용해하지 않는 유기 용제를 함유하는 패턴 반전용 조성물을 도포하여, 패턴 반전용 막을 형성하고, 알칼리 현상액을 사용한 알칼리 현상에 의해, 상기 제 2 레지스트 패턴을 제거하면서 그 패턴 반전용 막을 패터닝하여, 제 3 패턴을 형성하는 공정 E 를 갖는 것을 특징으로 하는 레지스트 패턴 형성 방법. - 제 7 항에 있어서,
상기 패턴 반전용 조성물이, 수지 성분 (A”1) 을 함유하고, 상기 수지 성분 (A”1) 이, 규소 원자를 갖는 구성 단위를 포함하는 것을 특징으로 하는 레지스트 패턴 형성 방법. - 제 1 항에 있어서,
지지체 상에, 포지티브형 레지스트 조성물을 도포하여 포지티브형 레지스트막을 형성하고, 상기 포지티브형 레지스트막을 노광하고, 알칼리 현상하여, 제 1 레지스트 패턴을 형성하는 공정 A 와,
상기 제 1 레지스트 패턴이 형성된 상기 지지체 상에, 상기 제 1 레지스트 패턴을 피복하도록, 산 또는 열산 발생제를 함유하는 용액을 도포하고, 상기 제 1 레지스트 패턴과 이것을 피복하는 제 1 층을 포함하는 구조체를 얻는 공정 B 와,
상기 구조체를 피복하도록, 용제를 함유하는 용액을 도포하는 공정 B1 과,
상기 공정 B1 후의 상기 구조체를 가열하여, 상기의 산 또는 열산 발생제로부터 발생하는 산의 작용에 의해 상기 제 1 레지스트 패턴의 유기 용제에 대한 용해성을 변화시키는 공정 C 와,
상기 가열 후의 구조체를 유기 용제 현상하고, 상기 제 1 레지스트 패턴의 유기 용제에 대한 용해성이 변화된 영역 이외의 영역을 제거하여, 스플릿 패턴인 제 2 레지스트 패턴을 형성하는 공정 D 를 갖는, 레지스트 패턴 형성 방법으로서,
상기 포지티브형 레지스트 조성물은, 산 확산 제어제를 함유하고,
상기 산 확산 제어제는, 산 해리 정수 (pKa) 가 3.0 이상인 산을 함유하는 것을 특징으로 하는 레지스트 패턴 형성 방법. - 삭제
- 제 9 항에 있어서,
상기 산 확산 제어제가, 하기 일반식 (d1-1) ∼ (d1-3) 중 어느 하나로 나타내는 화합물을 함유하는 레지스트 패턴 형성 방법.
[화학식 1]
[일반식 (d1-1) ∼ (d1-3) 중,
Rd1 ∼ Rd4 는 치환기를 가지고 있어도 되는 고리형 기, 치환기를 가지고 있어도 되는 사슬형의 알킬기, 또는 치환기를 가지고 있어도 되는 사슬형의 알케닐기이다. 단, 식 (d1-2) 중의 Rd2 에 있어서의, S 원자에 인접하는 탄소 원자에는 2 개 이상의 불소 원자는 결합되어 있지 않은 것으로 한다.
Yd1 은 단결합, 또는 2 가의 연결기이다. Mm+ 는 각각 독립적으로 m 가의 유기 카티온이다.] - 제 1 항에 있어서,
상기 열산 발생제가, 하기 일반식 (T1-1) ∼ (T1-3) 중 어느 하나로 나타내는 화합물을 함유하는 레지스트 패턴 형성 방법.
[화학식 1]
[식 중, Rt101, Rt104 ∼ Rt108 은 각각 독립적으로 치환기를 가지고 있어도 되는 고리형 기, 치환기를 가지고 있어도 되는 사슬형의 알킬기, 또는 치환기를 가지고 있어도 되는 사슬형의 알케닐기이다. Rt104, Rt105 는, 서로 결합하여 고리를 형성하고 있어도 된다. Rt106 ∼ Rt107 중 어느 2 개는, 서로 결합하여 고리를 형성하고 있어도 된다. Rt102 는 불소 원자 또는 탄소수 1 ∼ 5 의 불소화 알킬기이다. Yt101 은 단결합 또는 산소 원자를 함유하는 2 가의 연결기이다. Vt101 ∼ Vt103 은 각각 독립적으로 단결합, 알킬렌기, 또는 불소화 알킬렌기이다. Lt101 ∼ Lt102 는 각각 독립적으로 단결합 또는 산소 원자이다. Lt103 ∼ Lt105 는 각각 독립적으로 단결합, -CO- 또는 -SO2- 이다. Rt301 ∼ Rt304 는, 각각 독립적으로, 수소 원자 또는 탄소수 1 ∼ 12 의 직사슬형, 분기 사슬형 또는 고리형의 불소화 알킬기이다. Rt301 ∼ Rt303 은, 서로 결합하여 식 중의 질소 원자와 함께 고리를 형성하고 있어도 된다.] - 제 1 항에 있어서,
상기 산 또는 열산 발생제를 함유하는 용액이, 고분자 화합물을 함유하고, 상기 고분자 화합물이, 극성기 함유 지방족 탄화수소기를 포함하는 구성 단위 (a3) 을 갖는 레지스트 패턴 형성 방법. - 제 1 항에 있어서,
상기 산 또는 열산 발생제를 함유하는 용액이, 탄소수 1 ∼ 10 의 직사슬형 또는 분기 사슬형의 1 가의 알코올을 함유하는 레지스트 패턴 형성 방법. - 삭제
- 삭제
- 삭제
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- 삭제
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