KR100745891B1 - Cleaning solution for photoresist - Google Patents
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- KR100745891B1 KR100745891B1 KR1020010079354A KR20010079354A KR100745891B1 KR 100745891 B1 KR100745891 B1 KR 100745891B1 KR 1020010079354 A KR1020010079354 A KR 1020010079354A KR 20010079354 A KR20010079354 A KR 20010079354A KR 100745891 B1 KR100745891 B1 KR 100745891B1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/425—Stripping or agents therefor using liquids only containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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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- 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
- G03F7/16—Coating processes; Apparatus therefor
- G03F7/168—Finishing the coated layer, e.g. drying, baking, soaking
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
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- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
- G03F7/322—Aqueous alkaline compositions
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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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/38—Treatment before imagewise removal, e.g. prebaking
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
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Abstract
본 발명은 포토레지스트 세정액 조성물에 관한 것으로, 더욱 상세하게는 포토레지스트 패턴 형성 시, 현상 후 마지막 공정으로 반도체 기판을 세정하는데 사용하는 포토레지스트 세정액 조성물 및 이를 이용한 패턴 형성 방법에 관한 것이다.The present invention relates to a photoresist cleaning liquid composition, and more particularly, to a photoresist cleaning liquid composition used to clean a semiconductor substrate in a final process after development, and a pattern forming method using the same when forming a photoresist pattern.
이러한 본 발명의 세정액 조성물은 하기 화학식 1의 알코올 아민과 카르복실산 화합물의 염으로 이루어진 계면 활성제, 알코올 화합물 및 물을 포함하는 것으로 종래에 사용하던 증류수보다 표면장력이 낮기 때문에 본 발명의 세정액 조성물을 사용함으로써 패턴 붕괴 현상을 개선시킬 수 있다.Such a cleaning liquid composition of the present invention includes a surfactant, an alcohol compound, and water consisting of a salt of an alcohol amine and a carboxylic acid compound of Formula 1, and has a lower surface tension than distilled water used in the prior art. By using it, the pattern collapse phenomenon can be improved.
[화학식 1][Formula 1]
상기 식에서, R1 및 R2는 각각 수소, C1-C10의 알킬 또는 C 1-C10의 알킬알코올이며,Wherein R, R 1 and R 2 are each hydrogen, alkyl or C 1 -C 10 alcohols, the C 1 -C 10,
n은 1 내지 10의 정수이다.n is an integer from 1 to 10.
Description
도 1은 본 발명에 따른 실시예 6에 의해 형성된 포토레지스트 패턴 사진.1 is a photoresist pattern photo formed by Example 6 according to the present invention.
도 2는 본 발명에 따른 실시예 7에 의해 형성된 포토레지스트 패턴 사진.2 is a photoresist pattern photo formed by Example 7 according to the present invention.
도 3은 본 발명에 따른 실시예 8에 의해 형성된 포토레지스트 패턴 사진.Figure 3 is a photoresist pattern photo formed by Example 8 according to the present invention.
도 4는 본 발명에 따른 실시예 9에 의해 형성된 포토레지스트 패턴 사진.4 is a photoresist pattern photo formed by Example 9 according to the present invention.
도 5는 본 발명에 따른 실시예 10에 의해 형성된 포토레지스트 패턴 사진.5 is a photoresist pattern photo formed by Example 10 according to the present invention.
도 6은 비교예에 의해 형성된 포토레지스트 패턴 사진.6 is a photoresist pattern photo formed by the comparative example.
본 발명은 포토레지스트 세정액 조성물에 관한 것으로, 더욱 상세하게는 포토레지스트 패턴 형성 시, 현상 후 마지막 공정으로 반도체 기판을 세정하는데 사용하는 포토레지스트 세정액 조성물 및 이를 이용한 패턴 형성 방법에 관한 것이다.The present invention relates to a photoresist cleaning liquid composition, and more particularly, to a photoresist cleaning liquid composition used to clean a semiconductor substrate in a final process after development, and a pattern forming method using the same when forming a photoresist pattern.
근래에 디바이스가 점점 미세화 되어감에 따라 포토레지스트 패턴의 아스펙트비 (aspect ratio; 포토레지스트 두께, 즉 형성된 패턴의 높이/선폭)가 높아지게 되는데, 그 결과 세정 공정 시에 패턴이 붕괴하는 문제가 발생한다. In recent years, as the device becomes more and more finer, the aspect ratio (photoresist thickness, ie, the height / line width of the formed pattern) of the photoresist pattern becomes high. As a result, the pattern collapses during the cleaning process. do.
포토레지스트 패턴의 붕괴는 형성된 포토레지스트 패턴의 높이가 임계 높이를 넘었을 때 모세관력 (capillary force)이 포토레지스트 자체의 탄성력을 능가하게 되어 패턴이 쓰러지게 되는 것이다. 이를 해결하기 위하여 포토레지스트 내부의 탄성을 증가시키거나 포토레지스트 자체의 표면장력을 낮춰 피식각층과 포토레지스트 사이의 부착력을 높이는 방법 등을 시도할 수 있다.The collapse of the photoresist pattern is that when the height of the formed photoresist pattern exceeds the critical height, the capillary force exceeds the elastic force of the photoresist itself, causing the pattern to collapse. In order to solve this problem, a method of increasing the elasticity inside the photoresist or lowering the surface tension of the photoresist itself may increase the adhesion between the etched layer and the photoresist.
한편, 반도체 기판 상에 포토레지스트 패턴을 형성하는 일반적인 방법을 개략적으로 보면, 먼저 반도체 기판 상에 피식각층을 형성한 다음, 피식각층 위에 포토레지스트 막을 형성하고, 이를 노광 및 현상하여 상기 피식각층의 일부를 노출시키는 포토레지스트 패턴을 형성한다. 이때 포지티브형 포토레지스트 막을 사용한 경우에는 현상액과 포토레지스트 막의 화학 반응에 의하여 노광 영역에서 포토레지스트 막이 제거되어 포토레지스트 패턴이 형성된다.Meanwhile, when a general method of forming a photoresist pattern on a semiconductor substrate is roughly described, first, an etching target layer is formed on a semiconductor substrate, and then a photoresist film is formed on the etching target layer, and the photoresist layer is exposed and developed to expose a portion of the etching target layer. A photoresist pattern is formed to expose the film. In this case, when a positive photoresist film is used, the photoresist film is removed from the exposure area by a chemical reaction between the developer and the photoresist film to form a photoresist pattern.
상기와 같이 포토레지스트 패턴을 현상한 다음 마지막 공정으로 반도체 기판을 스핀 시키면서 스핀 장치의 상부로부터 증류수를 분사시켜서 반도체 기판을 세정하는 과정을 거치는데, 이 과정에서 증류수의 표면장력이 높아 패턴이 붕괴하는 문제점이 발생한다.After developing the photoresist pattern as described above, the semiconductor substrate is cleaned by spraying distilled water from the top of the spin apparatus while spinning the semiconductor substrate in the final process. In this process, the surface tension of the distilled water is high and the pattern collapses. A problem occurs.
이에 본 발명자들은 130nm 이하의 초미세 포토레지스트 패턴 형성시 현상공정에서 패턴이 붕괴되는 문제점을 해결하고자, 종래의 증류수 대신 표면장력을 낮춘 새로운 조성의 세정액을 사용함으로써 포토레지스트 패턴 붕괴를 방지할 수 있음을 알아내어 본 발명을 완성하였다.Accordingly, the present inventors can prevent the photoresist pattern collapse by using a cleaning solution of a new composition lowering the surface tension instead of distilled water in order to solve the problem that the pattern collapses in the development process when forming an ultra-fine photoresist pattern of less than 130nm. The present invention was completed by finding out.
본 발명의 목적은 포토레지스트 패턴의 붕괴를 방지할 목적으로 사용하는 새로운 조성의 세정액 조성물을 제공하는 것이다. An object of the present invention is to provide a cleaning liquid composition having a new composition for use for the purpose of preventing the collapse of the photoresist pattern.
또한 본 발명의 목적은 상기 세정액 조성물을 이용하여 포토레지스트 패턴을 형성하는 방법 및 이러한 방법에 의해 얻어진 반도체 소자를 제공하는 것이다.It is also an object of the present invention to provide a method of forming a photoresist pattern using the cleaning liquid composition and a semiconductor device obtained by such a method.
상기 목적을 달성하기 위하여 본 발명에서는 우선, 포토레지스트 세정액 조성물을 제공한다.In order to achieve the above object, the present invention first provides a photoresist cleaning liquid composition.
이러한 본 발명의 세정액 조성물은 계면 활성제, 알코올 화합물 및 물의 혼합용액을 포함할 때, 이때 계면 활성제로서 하기 화학식 1로 표시되는 알코올 아민과 카르복실산 기를 포함하는 화합물로부터 제조된다. When the cleaning liquid composition of the present invention includes a mixed solution of a surfactant, an alcohol compound and water, it is prepared from a compound including an alcohol amine and a carboxylic acid group represented by the following Formula 1 as the surfactant.
[화학식 1][Formula 1]
상기 식에서, Where
R1 및 R2는 각각 수소, C1-C10의 알킬 및 C1-C10 의 알킬 알코올이이며,R 1 and R 2 are each hydrogen, an alkyl alcohol of C 1 -C 10 alkyl and C 1 -C 10 a,
n은 1 내지 10의 정수이다.n is an integer from 1 to 10.
상기 알코올 아민은 바람직하게는 모노에탄올 아민 (monoethanolamine), 디에탄올 아민 (diethanolamine) 및 트리에탄올 아민 (triethanolamine) 등을 사용할 수 있다.The alcohol amine may preferably be monoethanol amine (monoethanolamine), diethanol amine (diethanolamine) and triethanolamine (triethanolamine).
또한, 이와 같이 알코올 아민과 지방산 염으로 이루어진 계면 활성제는 우수한 계면 활성을 가지며, 금속 비누와 대비하여 pH가 낮을 뿐만 아니라, 중성에서 세정력 및 안정성이 우수하며, 물이나 유기 용매에서도 잘 녹아 세제나 유화제 등의 넓은 용도로 사용한다.In addition, the surfactants composed of alcohol amines and fatty acid salts have excellent surface activity, have a low pH compared to metal soaps, have excellent cleaning power and stability in neutrality, and are well dissolved in water or organic solvents, and thus, detergents or emulsifiers. Used for a wide range of applications.
또한, 상기 카르복실산 (-COOH)기를 가지는 화합물은 C2-C500의 구조를 가지는 화합물이며, 바람직하게는 아세트산, 테트라코사논산 (tetracosanoic acid), 리놀레산 (linoleic acid), 올레산 (oleic acid) 및 스테아르산 (stearic acid) 등을 들 수 있다.In addition, the compound having a carboxylic acid (-COOH) group is a compound having a structure of C 2 -C 500 , preferably acetic acid, tetracosanoic acid, linoleic acid, oleic acid And stearic acid.
상기와 같이 알코올 아민과 카르복실산 화합물의 염은 전체 세정액 조성물의 0.001 내지 5 중량%를 사용하는 것이 바람직하다.As described above, the salt of the alcohol amine and the carboxylic acid compound is preferably used in 0.001 to 5% by weight of the total cleaning liquid composition.
한편, 상기 알코올 화합물로는 C1-C10의 알킬 알코올 또는 알콕시알코올을 사용하는데, 바람직하게는 메탄올, 에탄올, 프로판올, 이소프로판올, n-부탄올, sec-부탄올, t-부탄올, 1-펜탄올, 2-펜탄올, 3-펜탄올 또는 2,2-디메틸-1-프로판올 등의 알킬 알코올을 사용하고, 2-메톡시에탄올, 2-(2-메톡시에톡시)에탄올, 1-메톡시-2-프로판 또는 3-메톡시-1,2-프로판디올 등의 알콕시알코올을 사용하며, 이들을 단독으로 또는 혼합하여 사용할 수 있다.Meanwhile, the alcohol compound may be a C 1 -C 10 alkyl alcohol or alkoxyalcohol, preferably methanol, ethanol, propanol, isopropanol, n-butanol, sec-butanol, t-butanol, 1-pentanol, 2-methoxyethanol, 2- (2-methoxyethoxy) ethanol, 1-methoxy-, using alkyl alcohols such as 2-pentanol, 3-pentanol or 2,2-dimethyl-1-propanol Alkoxy alcohols such as 2-propane or 3-methoxy-1,2-propanediol are used, and these may be used alone or in combination.
상기 알코올 화합물의 사용량은 전체 세정액 조성물의 0.01 내지 10 중량%인 것이 바람직하다. It is preferable that the usage-amount of the said alcohol compound is 0.01 to 10 weight% of the whole cleaning liquid composition.
또한, 상기 물은 증류수를 말하는 것으로, 그 사용량은 전체 세정액 조성물의 85 내지 99.989 중량%인 것이 바람직하다.In addition, the water refers to distilled water, the amount is preferably 85 to 99.989% by weight of the total cleaning liquid composition.
본 발명에 따른 세정액 조성물은 이상에서 설명한 바와 같이 계면 활성제 0.001 내지 5 중량%, 알코올 화합물 0.01 내지 10 중량% 및 물 85 내지 99.989 중량%의 혼합용액을 만든 다음, 0.2㎛ 여과기로 여과함으로써 제조된다.The cleaning solution composition according to the present invention is prepared by making a mixed solution of 0.001 to 5% by weight of surfactant, 0.01 to 10% by weight of alcohol compound and 85 to 99.989% by weight of water, and then filtering with a 0.2 μm filter.
이러한 본 발명의 세정액 조성물은 현상액을 사용하는 즉, 습식현상 공정을 채택하는 포토레지스트 패턴 형성공정에 사용 가능하다.Such a cleaning liquid composition of the present invention can be used for a photoresist pattern forming process that uses a developer, that is, a wet development process.
본 발명에서는 또한 하기와 같은 단계를 포함하는 포토레지스트 패턴 형성방법을 제공한다:The present invention also provides a method of forming a photoresist pattern comprising the following steps:
(a) 반도체 기판에 형성된 피식각층 상부에 통상의 포토레지스트를 도포하여 포토레지스트 막을 형성하는 단계;(a) forming a photoresist film by applying a conventional photoresist on the etched layer formed on the semiconductor substrate;
(b) 상기 포토레지스트 막을 노광원으로 노광하는 단계(b) exposing the photoresist film to an exposure source
(c) 상기 노광된 포토레지스트 막을 현상액으로 현상하는 단계 ; 및(c) developing the exposed photoresist film with a developer; And
(d) 상기 결과물을 본 발명에 따른 세정액 조성물로 세정하는 단계.(d) washing the resultant with the cleaning liquid composition according to the present invention.
상기 과정에서 (b) 단계의 노광전에 소프트 베이크 공정, 또는 (b) 단계의 노광후에 포스트 베이크 공정을 실시하는 단계를 더 포함할 수 있으며, 이 베이크 공정은 70 내지 200℃에서 수행되는 것이 바람직하다.In the process may further comprise the step of performing a soft bake process before the exposure of step (b), or a post bake process after the exposure of step (b), the baking process is preferably carried out at 70 to 200 ℃ .
또한, 상기 노광공정은 VUV (157nm), ArF (193nm), KrF (248nm), EUV (13nm), E-빔, X-선 또는 이온빔을 노광원으로 사용하여, 0.1 내지 50mJ/cm2의 노광 에너지로 수행되는 것이 바람직하다.In addition, the exposure step is exposed to 0.1 to 50mJ / cm 2 using VUV (157nm), ArF (193nm), KrF (248nm), EUV (13nm), E-beam, X-rays or ion beams as the exposure source It is preferably carried out with energy.
한편, 상기에서 현상 단계 (c)는 알칼리 현상액을 이용하여 수행될 수 있으며, 알칼리 현상액은 0.01 내지 5 중량%의 테트라메틸암모늄하이드록사이드(TMAH) 수용액인 것이 바람직하다.On the other hand, the developing step (c) in the above may be performed using an alkaline developer, the alkaline developer is preferably 0.01 to 5% by weight of tetramethylammonium hydroxide (TMAH) aqueous solution.
본 발명에서는 전술한 바와 같이, 현상의 마지막 단계에서 알코올 아민과 지방산 염을 포함하는 세정액 조성물로 세정하는 공정을 거침으로써, 세정액 조성물의 표면장력이 낮아지기 때문에 포토레지스트 패턴 형성시 현상공정에서 패턴이 붕괴되는 현상을 개선시킬 수 있다.In the present invention, as described above, the surface tension of the cleaning liquid composition is lowered by going through the process of cleaning with a cleaning liquid composition containing an alcohol amine and a fatty acid salt in the last stage of development, so that the pattern collapses in the developing process when the photoresist pattern is formed. Can improve the phenomenon.
본 발명에서는 또한 상기 본 발명의 포토레지스트 패턴 형성방법을 이용하여 제조된 반도체 소자를 제공한다.The present invention also provides a semiconductor device manufactured using the photoresist pattern forming method of the present invention.
이하 본 발명을 실시예에 의하여 상세히 설명한다. 단 실시예는 발명을 예시하는 것일 뿐 본 발명이 하기 실시예에 의하여 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail by examples. However, the examples are only to illustrate the invention and the present invention is not limited by the following examples.
실시예 1 : 본 발명에 따른 세정액 조성물 제조(1)Example 1 Preparation of Cleaning Liquid Composition (1) According to the Present Invention
모노에탄올 아민-테트라코사논산 (1 : 1 mol 비) 염 1g, 이소프로판올 4g 및 물 95g을 1분간 교반하여 섞어준 후 이를 0.2㎛ 여과기로 여과하여 본 발명에 따른 세정액 조성물을 제조하였다.1 g of monoethanol amine-tetracosananoic acid (1: 1 mol ratio) salt, 4 g of isopropanol, and 95 g of water were stirred and mixed for 1 minute, followed by filtering with a 0.2 µm filter to prepare a cleaning liquid composition according to the present invention.
실시예 2 : 본 발명에 따른 세정액 조성물 제조(2)Example 2 Preparation of Washing Liquid Composition According to the Present Invention (2)
트리에탄올 아민-리놀레산 (1 : 1 mol 비) 염 1g, 에탄올 4g 및 물 95g을 1분간 교반하여 섞어준 후 이를 0.2㎛ 여과기로 여과하여 본 발명에 따른 세정액 조성물을 제조하였다. 1 g of triethanol amine-linoleic acid (1: 1 mol ratio) salt, 4 g of ethanol, and 95 g of water were stirred and mixed for 1 minute, followed by filtering with a 0.2 µm filter to prepare a cleaning liquid composition according to the present invention.
실시예 3 : 본 발명에 따른 세정액 조성물 제조(3)Example 3 Preparation of Cleaning Liquid Composition (3) According to the Present Invention
트리에탄올 아민-아세트산 (1 : 1 mol 비) 염 1g, 이소프로판올 4g 및 물 95g을 1분간 교반하여 섞어준 후 이를 0.2㎛ 여과기로 여과하여 본 발명에 따른 세정액 조성물을 제조하였다.1 g of triethanol amine-acetic acid (1: 1 mol ratio) salt, 4 g of isopropanol, and 95 g of water were stirred and mixed for 1 minute, followed by filtering with a 0.2 µm filter to prepare a cleaning liquid composition according to the present invention.
실시예 4 : 본 발명에 따른 세정액 조성물 제조(4)Example 4 Preparation of Cleaning Liquid Composition (4) According to the Present Invention
디에탄올 아민-스테아르산 (1 : 1 mol 비) 염 1g, 1-펜탄올 4g 및 물 95g을 1분간 교반하여 섞어준 후 이를 0.2㎛ 여과기로 여과하여 본 발명에 따른 세정액 조성물을 제조하였다.1 g of diethanol amine-stearic acid (1: 1 mol ratio) salt, 4 g of 1-pentanol, and 95 g of water were stirred and mixed for 1 minute, followed by filtering with a 0.2 µm filter to prepare a cleaning liquid composition according to the present invention.
실시예 5 : 본 발명에 따른 세정액 조성물 제조(5)Example 5 Preparation of Cleaning Liquid Composition According to the Present Invention (5)
트리에탄올 아민-올레산 (1 : 1 mol 비) 염 1g, 메탄올 4g 및 물 95g을 1분간 교반하여 섞어준 후 이를 0.2㎛ 여과기로 여과하여 본 발명에 따른 세정액 조성물을 제조하였다.1 g of triethanol amine-oleic acid (1: 1 mol ratio) salt, 4 g of methanol, and 95 g of water were stirred and mixed for 1 minute, and then filtered through a 0.2 µm filter to prepare a cleaning liquid composition according to the present invention.
실시예 6 : 포토레지스트 패턴 형성(1)Example 6 Photoresist Pattern Formation (1)
헥사메틸디실라잔 (HMDS) 처리된 실리콘 웨이퍼에 피식각층을 형성시키고, 그 상부에 메타크릴레이트 타입의 감광제인 Clariant사의 AX1020P를 3000rpm으로 스핀 코팅하여 포토레지스트 박막을 제조한 다음, 120℃의 오븐에서 90초간 소프트 베이크 하였다. 소프트 베이크 후 ArF 레이저 노광장비로 노광하고, 120℃의 오븐에서 90초간 다시 포스트 베이크 하였다. 베이크 완료 후 2.38 중량% TMAH 수용액에 30초간 침지하여 현상 후, 실리콘 웨이퍼를 스핀 시키면서, 스핀 장치의 상부로부터 실시예 1에서 제조한 세정액 30㎖를 분사시켜 세정한 후, 이를 건조시켜 83㎚ Line 패턴을 얻었다 (도 1 참조).An etched layer was formed on a hexamethyldisilazane (HMDS) -treated silicon wafer, and a photoresist thin film was prepared by spin-coating a methacrylate-type photosensitive agent Clariant's AX1020P at 3000 rpm, followed by an oven at 120 ° C. Soft bake for 90 seconds at. After soft baking, it exposed with the ArF laser exposure equipment, and post-baked again for 90 second in 120 degreeC oven. After completion of baking, the solution was immersed in a 2.38 wt% TMAH aqueous solution for 30 seconds to develop, followed by spinning a silicon wafer, followed by cleaning by spraying 30 ml of the cleaning solution prepared in Example 1 from the top of the spin apparatus, and drying it to dry 83 nm line pattern Was obtained (see FIG. 1).
실시예 7 : 포토레지스트 패턴 형성(2)Example 7 Photoresist Pattern Formation (2)
실시예 2에서 제조한 세정액을 사용하는 것을 제외하고는 실시예 1과 동일한 방법으로 90㎚ Line 패턴을 얻었다 (도 2 참조). A 90 nm line pattern was obtained in the same manner as in Example 1 except that the cleaning solution prepared in Example 2 was used (see FIG. 2).
실시예 8 : 포토레지스트 패턴 형성(3)Example 8 Photoresist Pattern Formation (3)
실시예 3에서 제조한 세정액을 사용하는 것을 제외하고는 실시예 1과 동일한 방법으로 93㎚ Line 패턴을 얻었다 (도 3 참조). A 93 nm line pattern was obtained in the same manner as in Example 1 except that the cleaning solution prepared in Example 3 was used (see FIG. 3).
실시예 9 : 포토레지스트 패턴 형성(4)Example 9 Photoresist Pattern Formation (4)
실시예 4에서 제조한 세정액을 사용하는 것을 제외하고는 실시예 1과 동일한 방법으로 92㎚ Line 패턴을 얻었다 (도 4 참조).A 92 nm line pattern was obtained in the same manner as in Example 1 except that the cleaning solution prepared in Example 4 was used (see FIG. 4).
실시예 10 : 포토레지스트 패턴 형성(5)Example 10 Photoresist Pattern Formation (5)
실시예 5에서 제조한 세정액을 사용하는 것을 제외하고는 실시예 1과 동일한 방법으로 87㎚ Line 패턴을 얻었다 (도 5 참조).A 87 nm line pattern was obtained in the same manner as in Example 1 except that the cleaning solution prepared in Example 5 was used (see FIG. 5).
비교예 1 : 포토레지스트 패턴 형성(6)Comparative Example 1: Photoresist Pattern Formation (6)
본 발명에 따른 세정액을 사용하는 대신 증류수를 사용하는 것을 제외하고는 실시예 1과 동일한 방법으로 초미세 포토레지스트 패턴을 얻었으나, 상기 실시예 6 내지 10에서 생성된 패턴과 달리 패턴이 붕괴되었다 (도 6 참조).An ultrafine photoresist pattern was obtained in the same manner as in Example 1 except that distilled water was used instead of the cleaning solution according to the present invention, but unlike the patterns generated in Examples 6 to 10, the patterns were collapsed ( 6).
이상에서 살펴본 바와 같이, 알코올 아민과 카르복실산 염의 계면 활성제, 알코올 화합물 및 물을 포함하는 본 발명의 세정액 조성물은 종래에 사용하던 증류 수보다 표면장력이 낮기 때문에 포토레지스트 패턴 형성 시, 현상 후 마지막 공정으로 반도체 기판을 세정하는데 사용함으로써 패턴 붕괴 현상이 크게 줄어드는 것을 알 수 있었다. 따라서 130nm 이하의 초미세 포토레지스트 패턴 형성 공정의 안정화에 크게 기여할 것으로 보인다.As described above, since the cleaning liquid composition of the present invention containing a surfactant of an alcohol amine and a carboxylic acid salt, an alcohol compound, and water has a lower surface tension than the distilled water used in the prior art, it is necessary to develop the photoresist pattern after development. It was found that the pattern collapse phenomenon is greatly reduced by using the semiconductor substrate to clean the process. Therefore, it is expected to contribute greatly to the stabilization of the ultrafine photoresist pattern formation process of 130 nm or less.
Claims (11)
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| KR1020010079354A KR100745891B1 (en) | 2001-12-14 | 2001-12-14 | Cleaning solution for photoresist |
| US10/317,578 US7563753B2 (en) | 2001-12-12 | 2002-12-12 | Cleaning solution for removing photoresist |
| CNB021518629A CN1240816C (en) | 2001-12-12 | 2002-12-12 | Liquid detergent for removing photoresist |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11125916A (en) * | 1997-10-21 | 1999-05-11 | Fuji Film Olin Kk | Photoresist stripping solution |
| JPH11125917A (en) * | 1997-10-21 | 1999-05-11 | Fuji Film Olin Kk | Photoresist stripping solution |
| JPH11282176A (en) * | 1998-03-26 | 1999-10-15 | Toray Fine Chemical Kk | Composition for removing photoresist |
| JP2000039727A (en) * | 1998-07-10 | 2000-02-08 | Samsung Electronics Co Ltd | Stripper composition for photoresist |
| KR20010012158A (en) * | 1998-03-03 | 2001-02-15 | 실리콘 밸리 켐랩스 인코퍼레이티드 | Composition and method for removing resist and etching residues using hydroxylammonium carboxylates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11125916A (en) * | 1997-10-21 | 1999-05-11 | Fuji Film Olin Kk | Photoresist stripping solution |
| JPH11125917A (en) * | 1997-10-21 | 1999-05-11 | Fuji Film Olin Kk | Photoresist stripping solution |
| KR20010012158A (en) * | 1998-03-03 | 2001-02-15 | 실리콘 밸리 켐랩스 인코퍼레이티드 | Composition and method for removing resist and etching residues using hydroxylammonium carboxylates |
| JPH11282176A (en) * | 1998-03-26 | 1999-10-15 | Toray Fine Chemical Kk | Composition for removing photoresist |
| JP2000039727A (en) * | 1998-07-10 | 2000-02-08 | Samsung Electronics Co Ltd | Stripper composition for photoresist |
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