KR20070106385A - 상호접속 구조체를 형성하는데 있어서의 세정 포로스낮은-케이 재료 - Google Patents
상호접속 구조체를 형성하는데 있어서의 세정 포로스낮은-케이 재료 Download PDFInfo
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- KR20070106385A KR20070106385A KR1020070011151A KR20070011151A KR20070106385A KR 20070106385 A KR20070106385 A KR 20070106385A KR 1020070011151 A KR1020070011151 A KR 1020070011151A KR 20070011151 A KR20070011151 A KR 20070011151A KR 20070106385 A KR20070106385 A KR 20070106385A
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- Prior art keywords
- dielectric layer
- low
- opening
- acid
- metal
- Prior art date
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- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
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- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
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- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
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- H01L21/76811—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics for dual damascene structures involving multiple stacked pre-patterned masks
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Abstract
Description
Claims (12)
- 반도체 웨이퍼 세정 용액에 있어서,유기 용매(organic solvent);금속 시약(metal reagent);대용제(substitutive agent); 및물(water)을 포함하는, 반도체 웨이퍼 세정 용매.
- 제 1 항에 있어서, 상기 유기 용매는 약 0.01%와 약 90% 사이의 중량 퍼센티지를 갖고, 상기 금속 시약은 약 0.01%와 약 30% 사이의 중량 퍼센티지를 갖고, 상기 대용제(substitutive agent)는 약 0.01%와 약 30% 사이의 중량 퍼센티지를 가지며, 상기 물은 약 0.01%과 약 70% 사이의 중량 퍼센티지를 갖는, 반도체 웨이퍼 세정 용매.
- 제 1 항에 있어서, 상기 유기 용매는, 프로필렌 글리콜 모노메틸 에테르(propylene glycol monomethyl ether), 에틸렌 글리콜, 1,4-부티네디올(1,4-butynediol), 부티로렉톤(butyrolactone), 디에틸렌 글리콜 모노에틸 에테르(diethylene glycol monoethyl ether), 디에틸렌 글리콜 모노부틸 에테르(diethylene glycol monobutyl ether), 디에틸렌 글리콜 모노헥실 에테르(diethylene glycol monohexyl ether), N,N-디메틸 아세트아미드(N,N-dimethyl acetamide), N-메틸-2-피롤리돈(N-methyl-2-pyrrolidone), 사이클로펜타논(cyclopentanone), 디메틸술폭시드(dimethylsulfoxide), 및 이들의 조합물들을 필수적으로 포함하는 그룹으로부터 선택되는 재료를 포함하는, 반도체 웨이퍼 세정 용매.
- 제 1 항에 있어서, 상기 금속 시약은, 옥살산(oxalic acid), 말론산(malonic acid), 구연산(citric acid), 젖산(lactic acid), 글리콜 산, 프로피온산(propionic acid), 벤조트리아졸(Benzotriazole), 1,2,4-1H-트리아졸(1,2,4-1H-Triazole), 7-메틸린돌-2-카르복실산(7-Methylindole-2-carboxylic acid), 티오글리세롤(Thioglycerol), 1-피롤라인-5-카르복시산염(1-pyrroline-5-carboxylate), 불화 테트라메틸암모늄(Tetramethylammonium fluoride), 1,2-에탄디카르복실산(1,2-ethanedicarboxylic acid), 글리옥실산(Glyoxylic Acid), 1,2-에탄디카르복실산(1,2-ethanedicarboxylic acid) 및 그들의 조합물들을 필수적으로 포함하는 그룹으로부터 선택된 재료를 포함하는, 반도체 웨이퍼 세정 용매.
- 제 1 항에 있어서, 상기 대용제(substitutive agent)는, 테트라메틸 암모늄 하이드록사이드(tetramethyl ammonium hydroxide), 테트라에틸암모늄 하이드록사이드(tetramethylammonium hydroxide), 테트라-n-부틸암모늄 하이드록사이드(tetra-n-butylammonium hydroxide), 3-아미노프로판산(3-Aminopropanoic acid), 4-아미노부티르산 (4-Aminobutyric acid) 및 그들의 조합을 필수적으로 포함하는 그룹으로 부터 선택된 재료를 포함하는, 반도체 웨이퍼 세정 용매.
- 집적회로의 상호접속 구조체를 형성하는 방법에 있어서,기판 위에 낮은-k 유전체층을 형성하는 단계;상기 낮은 유전체층 위에 금속 하드 마스크(metal hard mask)를 형성하는 단계;상기 금속 하드 마스크에 제 1 오프닝을 형성하기 위해 상기 금속 하드 마스크를 패터닝하는 단계로서, 상기 낮은-k 유전체층은 상기 제 1 오프닝을 통해 노출되는, 상기 패터닝하는 단계;상기 낮은-k 유전체층에 제 2 오프닝을 형성하기 위해 상기 제 1 오프닝을 통해 상기 낮은-k 유전체층을 에칭하는 단계;세정 용액에 상기 기판과 위에 놓인 구조체들을 담금으로써 세정을 수행하는 단계로서, 상기 세정 용액은: 유기 용매(organic solvent), 금속 시약(metal reagent), 대용제(substitutive agent), 및 물(water)을 포함하는, 상기 세정 수행 단계;상기 제 2 오프닝에 확산 장벽층을 형성하는 단계; 및도전 재료로 상기 제 2 오프닝을 채우는 단계를 포함하는, 상호접속 구조체 형성 방법.
- 제 6 항에 있어서, 상기 낮은-k 유전체층을 형성하는 단계 전에 유전체층에 금속 피처(metal feature)을 형성하는 단계를 더 포함하고, 상기 금속 피처는 상기 낮은-k 유전체층을 에칭하는 단계 후에 상기 제 2 오프닝을 통해 노출되는, 상호접속 구조체 형성 방법.
- 제 6 항에 있어서, 상기 낮은-k 유전체층을 에칭하는 단계는 플라즈마 에칭을 포함하는, 상호접속 구조체 형성 방법.
- 제 6 항에 있어서, 상기 유기 용매는 약 0.01%와 약 90% 사이의 중량 퍼센티지를 갖고, 금속 시약은 약 0.01%와 약 30% 사이의 중량 퍼센티지를 갖고, 상기 대용제(substitutive agent)는 약 0.01%와 약 30% 사이의 중량 퍼센티지를 갖고, 상기 대용제(substitutive agent)는 약 0.01%와 약 30% 사이의 중량 퍼센티지를 갖고, 상기 물은 약 0.01%와 약 70% 사이의 중량 퍼센티지를 갖는, 상호접속 구조체 형성 방법.
- 제 6 항에 있어서, 상기 반도체 웨이터는 약 8분보다 작은 시간 동안 상기 세정 용액에 담겨지는, 상호접속 구조체 형성 방법.
- 제 6 항에 있어서, 상기 세정 용액은 약 20%와 약 70% 사이의 온도를 갖는, 상호접속 구조체를 형성하는 방법
- 제 6 항에 있어서, 상기 낮은-k 유전체층을 에칭하는 단계는:상기 금속 하드 마스크 위에 포토레지스트에 오프닝을 통해 상기 낮은-k 유전체층을 부분적으로 에칭하는 단계;상기 포토레지스트를 에싱(ashing)하는 단계; 및상기 제 2 오프닝이 트렌치 오프닝 및 비아 오프닝을 포함하도록 상기 금속 하드 마스크를 마스크로서 사용하여 상기 낮은-k 유전체층을 에칭하는 단계로서, 상기 비아 오프닝은 상기 낮은-k 유전체층의 바닥에 도달하는, 상기 낮은-k 유전체층 에칭 단계를 포함하는, 상호접속 구조체를 형성하는 방법.
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US11/500,025 US20070254476A1 (en) | 2006-04-28 | 2006-08-07 | Cleaning porous low-k material in the formation of an interconnect structure |
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US7968506B2 (en) * | 2008-09-03 | 2011-06-28 | Taiwan Semiconductor Manufacturing Co., Ltd. | Wet cleaning stripping of etch residue after trench and via opening formation in dual damascene process |
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CN102693935A (zh) * | 2011-03-22 | 2012-09-26 | 中芯国际集成电路制造(上海)有限公司 | 互连结构的制造方法 |
CN102324400A (zh) * | 2011-09-28 | 2012-01-18 | 上海华力微电子有限公司 | 铜互连结构的制作方法 |
US8623468B2 (en) * | 2012-01-05 | 2014-01-07 | Taiwan Semiconductor Manufacturing Company, Ltd. | Methods of fabricating metal hard masks |
CN103531527B (zh) * | 2012-07-03 | 2016-07-06 | 中芯国际集成电路制造(上海)有限公司 | 金属互连结构的制作方法 |
CN102867780A (zh) * | 2012-09-17 | 2013-01-09 | 上海华力微电子有限公司 | 一种铜互连工艺 |
CN103811409B (zh) * | 2012-11-12 | 2016-04-20 | 中微半导体设备(上海)有限公司 | 一种增强低介电材料对TiN硬掩模刻蚀选择性的方法 |
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CN106298441B (zh) * | 2015-05-18 | 2020-03-27 | 盛美半导体设备(上海)股份有限公司 | 半导体工艺中去除残余物质的方法 |
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