WO2004092238A1 - 下地材用樹脂、下地材、積層体、及び多層レジストパターン形成方法 - Google Patents
下地材用樹脂、下地材、積層体、及び多層レジストパターン形成方法 Download PDFInfo
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- WO2004092238A1 WO2004092238A1 PCT/JP2004/005330 JP2004005330W WO2004092238A1 WO 2004092238 A1 WO2004092238 A1 WO 2004092238A1 JP 2004005330 W JP2004005330 W JP 2004005330W WO 2004092238 A1 WO2004092238 A1 WO 2004092238A1
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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
- G03F7/095—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having more than one photosensitive layer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/12—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with monohydric phenols having only one hydrocarbon substituent ortho on para to the OH group, e.g. p-tert.-butyl phenol
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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
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
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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
- G03F7/022—Quinonediazides
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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
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
- G03F7/0233—Macromolecular quinonediazides; Macromolecular additives, e.g. binders characterised by the polymeric binders or the macromolecular additives other than the macromolecular quinonediazides
- G03F7/0236—Condensation products of carbonyl compounds and phenolic compounds, e.g. novolak resins
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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
- G03F7/094—Multilayer resist systems, e.g. planarising layers
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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
- 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
- G03F7/075—Silicon-containing compounds
- G03F7/0757—Macromolecular compounds containing Si-O, Si-C or Si-N bonds
Definitions
- the present invention relates to a base material resin, a base material, a laminate, and a method for forming a multilayer resist pattern.
- the present application claims the priority based on Japanese Patent Application No. 2003-114114 filed on April 18, 2003, the contents of which are incorporated herein by reference. Background art
- a composition containing a resin for forming a film, a light-absorbing substance for absorbing reflected light, a crosslinking agent for thermally crosslinking them, and the like are generally used.
- an acrylic resin is mainly used as a resin for forming a film when one excimer laser beam such as KrF or ArF is used as irradiation light.
- NA numerical aperture
- a flattened film is provided between the substrate and the resist layer, and the resist-coated surface is flattened to form a flat, uniform-thickness resist layer (for example, See Japanese Patent Application Laid-Open No. 6-35201).
- a planarization technique it is possible to form a finer pattern by increasing NA.
- a base material containing a resin for forming a film is applied on a substrate, and this is heated to form a film, whereby an organic film is provided.
- a three-layer resist method in which an intermediate film made of an inorganic film is provided, and then a photoresist film is further provided thereon.
- a resist pattern is formed on a photoresist film by a usual photolithography technique, the pattern is transferred by etching the intermediate film using the resist pattern as a mask, and then the organic film is formed using the patterned intermediate film as a mask.
- the film is etched to form a pattern on the substrate (see, for example, JP-A-2001-514222).
- a two-layer resist method which is superior in that the number of steps is smaller than that of the three-layer resist method has been proposed (for example, Japanese Patent Application Laid-Open Nos. Sho 61-239239, Sho 62-2-2). No. 57444).
- an organic film is provided on a substrate in the same manner as in the three-layer resist method, and then a photoresist film is provided thereon, and a resist pattern is formed by ordinary photolithography.
- etching is performed by oxygen plasma using the resist pattern as a mask to transfer the resist pattern to the organic film.
- etching is performed using a fluorocarbon-based gas or the like to form a pattern on the substrate.
- Lower films Films provided on the substrate and between the substrate and the resist layer (hereinafter, referred to as lower films), such as the antireflection film, the planarizing film, and the organic film described above, are used for etching the substrate. Resistance to etching by a fluorocarbon-based gas or the like is required. In recent years, as devices become more highly integrated and finer, steps and wiring patterns are becoming finer. Therefore, the lower layer film has these fine irregularities on the substrate surface. There is a demand for an embedding property that can be filled without gaps. However, the lower layer film conventionally used has not sufficient filling characteristics. Disclosure of the invention
- An object of the present invention is to provide a base material for forming an underlayer film having high filling characteristics, the resin for the base material, and a method for forming a resist pattern.
- a first aspect of the present invention for solving the above problems is a resin for a base material for forming a lower layer film between a substrate and a photoresist layer, wherein the resin for the base material has a molecular weight of 500 It is a nopolak resin whose content of the following low nuclei is 1% by mass or less as measured by gel permeation chromatography.
- a second aspect of the present invention that solves the above-mentioned problem is a base material for forming an underlayer film between a substrate and a photoresist layer, wherein at least a low nucleus having a molecular weight of 500 or less is contained.
- a base material containing a nopolak resin whose content is 1% by mass or less as measured by gel permeation chromatography.
- At least the content of low nuclei having a molecular weight of 500 or less on the substrate is 1% by mass or less as measured by gel permeation chromatography.
- Forming a lower layer film by applying and heating a base material containing fat, forming at least one photoresist layer on the lower layer film, and selectively forming the photoresist layer on the lower layer film. Exposing, exposing the exposed one to alkali development to form a resist pattern on the photoresist layer, etching the lower layer film with oxygen plasma using the resist pattern as a mask, and transferring the resist pattern to the lower layer film
- a method of forming a multilayer resist pattern comprising the steps of:
- a fourth aspect of the present invention for solving the above-mentioned problems is a laminate comprising at least a substrate, a photoresist layer, and a lower layer film located therebetween, wherein the lower layer film has a molecular weight of 500 or less.
- Low nucleolus content was determined by gel permeation chromatography.
- the present invention relates to a base material used for forming an underlayer film between a substrate and a photoresist layer in a manufacturing process of a semiconductor element, a liquid crystal display element, or the like, a resin for the base material, and a method of forming a multilayer resist pattern.
- a base material used for forming an underlayer film between a substrate and a photoresist layer in a manufacturing process of a semiconductor element, a liquid crystal display element, or the like a resin for the base material, and a method of forming a multilayer resist pattern.
- the resin for a base material of the present invention has a content of low nuclei having a molecular weight of 500 or less, preferably 200 or less, in a gel permeation chromatography method of 1% by mass or less, preferably 0.8% by mass or less. Nopolak resin.
- the content of the low nucleolus is preferably as small as possible, and is desirably 0% by mass.
- the “low nucleus having a molecular weight of 500 or less” is detected as a low-molecular fraction having a molecular weight of 500 or less when analyzed by the GPC method using polystyrene as a standard.
- Low nuclei having a molecular weight of 500 or less include monomers that have not been polymerized and those with a low degree of polymerization, for example, those in which 2 to 5 phenols are condensed with aldehydes, depending on the molecular weight And so on.
- the content (% by mass) of the low nucleus having a molecular weight of 500 or less is derived based on the analysis result by the GPC method. For example, it is measured by plotting the fraction number on the horizontal axis and the concentration on the vertical axis, and calculating the ratio (%) of the area under the curve of the low-molecular-weight fraction with a molecular weight of 500 or less to the area under the entire curve. .
- the mass average molecular weight (Mw) (in terms of polystyrene by gel permeation chromatography (GPC)) of the nopolak resin is not particularly limited, but usually about 300 to 100,000 is used. Preferably, it is 50,000 to 50,000, more preferably 8,000 to 3,000.
- the resin for a base material of the present invention is preferably cured by heating to 200 or more, more preferably to about 200 to 300, to form an alkali-insoluble lower layer film.
- a conventional resin for a base material during heating when forming the underlayer film, sublimates are generated from the base material and adhere to peripheral devices and the like, which deteriorates the yield.
- the base material resin is used, the amount of sublimed matter is reduced.
- the resistance of the underlayer film containing the resin to an organic solvent is also improved. Therefore, when the resist composition is applied on the lower layer film, intermixing with the organic solvent contained in the resist composition is unlikely to occur.
- the resin for a base material of the present invention is a novolak resin, absorption of excimer laser such as KrF or ArF is large. Therefore, the underlayer film containing the base material resin of the present invention also has an antireflection effect.
- a novolak resin having an Mw of 2000 to 4000 is produced, and low nuclei having a molecular weight of 500 or less are removed from the nopolak resin. , Mw within the range of 50,000 to 50,000.
- the production of the nopolak resin can be performed by a method generally used for the production of the nopolak resin. For example, it can be obtained by subjecting an aromatic compound having a phenolic hydroxyl group (hereinafter, simply referred to as “phenols”) to an aldehyde with addition condensation in the presence of an acid catalyst.
- phenols phenolic hydroxyl group
- phenols include phenol, o-cresol, m-cresol, P-cresol, o-ethylphenol, m-ethylphenol, p-ethylphenol, o-butylphenol, m_butylphenol, p —Butyl phenol 2,3-xylenol, 2,4-xylenol, 2,5-xylenol, 2,6-xylenol, 3,4-xylenol, 3,5-xylenol, 2,3,5-trimethylphenol, 3,4 , 5-trimethylphenol, p-phenylphenol, resorcinol, hydroquinone, hydroquinone monomethyl ether, pyrogallol, phloroglucinol, hydroxydiphenyl, bisphenol A, gallic acid, gallic acid ester, ⁇ -naphthol, 6-naphthol, etc. Is mentioned.
- a nopolak resin obtained by
- the proportion of m_cresol in the phenols is preferably from 20 to 100 mol%, more preferably from 40 to 90 mol%.
- the phenols further contain p-cresol in addition to m-cresol, since the film-forming property of the lower layer film is improved.
- the film forming property of the lower layer film is improved, occurrence of intermixing when a resist composition is applied on the lower layer film to form a photoresist layer is prevented.
- the ratio is preferably from 10 to 50 mol%, more preferably from 15 to 30 mol%.
- aldehydes examples include formaldehyde, furfural, benzaldehyde, nitrobenzaldehyde, and acetoaldehyde. Considering industrial productivity, formaldehyde is most preferred.
- the catalyst at the time of the addition condensation reaction is not particularly limited.
- an acid catalyst hydrochloric acid, nitric acid, sulfuric acid, formic acid, oxalic acid, acetic acid and the like can be used.
- the resin for a base material of the present invention can also be produced by removing low nuclei having a molecular weight of 500 or less from a nopolak resin generally commercially available for a resist.
- Adjustment of the Mw of the nopolak resin and removal of low nuclei having a molecular weight of 500 or less can be performed, for example, by the following fractional precipitation treatment.
- the nopolak resin (Mw 20000 to 4000) of the condensation product obtained as described above is dissolved in a polar solvent, and water, heptane, hexane, pentane And a poor solvent such as cyclohexane is added and mixed.
- low nuclei having a molecular weight of 500 or less are poorly soluble. Since it remains dissolved in the medium, the precipitate is collected by filtration, whereby the resin for a base material of the present invention having a reduced content of low nuclei having a molecular weight of 500 or less can be obtained.
- polar solvent examples include alcohols such as methanol and ethanol, ketones such as acetone and methyl ethyl ketone, dalicol ether esters such as ethylene glycol monoethyl ether acetate, and cyclic ethers such as tetrahydrofuran. Can be.
- the polar solvent and the poor solvent may be used alone or in combination of two or more as necessary.
- the Mw and the content of low nuclei having a molecular weight of 500 or less of the precipitate can be confirmed by the GPC method as described above.
- the above-mentioned nopolak resin has excellent embedding properties, and is used as an underlayer for forming the above-mentioned underlayer film such as an antireflection film, a planarization film, and an organic film between the substrate and the photoresist layer. It is suitable for materials.
- the base material of the present invention is a base material for forming an underlayer film between the substrate and the photoresist layer.
- the base material is characterized by containing at least the base material resin of the present invention (hereinafter, referred to as resin (A 1)) as a film-forming resin (hereinafter, referred to as a component (A)).
- the proportion of the resin (A 1) is preferably 20 to 100% by mass, more preferably 70 to 100% by mass, and most preferably 100% by mass.
- the base material of the present invention may include, as the component (A), in addition to the resin (A 1), a material generally used as a film-forming resin in the production of semiconductor devices and liquid crystal display devices. .
- the resin for forming a film has resistance to an alkali developing solution, can be etched by oxygen plasma, and has resistance to a fluorocarbon gas used for etching a silicon substrate and the like.
- c example is not particularly limited as long as the resin (a 1) other than the Noporakku resin (hereinafter, referred to as resin (a 2)), ⁇ click Lil resin (hereinafter, referred to as resin (a 3)) or the like may be exemplified .
- resin (a 1) other than the Noporakku resin
- resin (a 3)) or the like may be exemplified .
- the resin (A 2) a resin generally used for a resist composition can be used.
- the resin (A 2) preferably has an Mw in the range of from 300 to 300, preferably from 600 to 2000.
- Mw is less than 300, the resistance to an alkali developer tends to decrease, and when Mw exceeds 300, the embedding characteristics tend to deteriorate, which is not preferable.
- a resin generally used as a resin for a base material can be used.
- an acrylic resin containing a structural unit derived from a polymerizable compound having an ether bond and a structural unit derived from a polymerizable compound having a carboxyl group can be used.
- Examples of the polymerizable compound having an ether bond include 2-methoxyethyl (meth) acrylate, methoxytriethylene glycol (meth) acrylate, 3-methoxybutyl (meth) acrylate, ethyl carbitol (meth) acrylate, and phenoxypolyethylene.
- Examples thereof include (meth) acrylic acid derivatives having an ether bond and an ester bond, such as glycol (meth) acrylate, methoxypolypropylene glycol (meth) acrylate, and tetrahydrofurfuryl (meth) acrylate.
- the above (meth) acrylate is a general term for methacrylate and acrylate. These compounds can be used alone or in combination of two or more.
- Examples of the polymerizable compound having a carboxyl group include: monocarboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid; dicarboxylic acids such as maleic acid, fumaric acid, and itaconic acid; 2-methacryloyloxetyl succinic acid; Examples thereof include compounds having a carboxyl group and an ester bond, such as methacryloyloxyshetylmaleic acid, 2-methylacryloyloxytyl phthalic acid, and 2-methylacryloyloxyshetylhexahydrofuric acid.
- Preferred are acrylic acid and methacrylic acid. These compounds can be used alone or in combination of two or more.
- an acrylic resin having an alicyclic moiety or an aromatic ring in the side chain is preferably used because of its good resistance to an alkali developing solution.
- the base material of the present invention may contain a phenol derivative having a molecular weight of 200 or more esterified with naphthoquinonediazidosulfonic acid (hereinafter, referred to as a component (B)) in addition to the component (A) as described above. preferable.
- a component (B) a phenol derivative having a molecular weight of 200 or more esterified with naphthoquinonediazidosulfonic acid
- the component (B) By containing such a component (B), the film formability of the lower layer film is improved. Therefore, although it differs depending on the composition of the component (A), when the component (B) is not contained, it is preferable to heat at a temperature of, for example, about 30 for sufficient film formation.
- a lower layer film having sufficient etching resistance and organic solvent resistance can be obtained.
- the above-mentioned sulfonic acid includes a reactive derivative such as such a halongenide.
- the component (B) acts as a crosslinking agent to the component (A) by heating at a temperature of 200 or more.
- component (B) when the component (B) is used, sublimation is less generated than when a crosslinking agent generally used for a base material is used. This is because the component (B) easily forms a cross-link with the component (A), so that low nuclei in the component (A) and sublimates derived from the non-cross-linked component (B) are generated. Is presumed to be small.
- Japanese Patent Application Laid-Open No. 2002-278080 discloses a photosensitive component of a positive photosensitive resin composition, Compounds represented by (I) and (II) can be mentioned. These compounds may be used alone or as a mixture of two or more.
- D 1 , D 2 and D 3 are a naphthoquinone-1,2-diazidosulfonyl group and the rest is a hydrogen atom; and m and n are integers of 0 to 3. is there]
- esterification reaction product of bis (5-cyclohexyl-4-hydroxy-2-methylphenyl) -1,3,4-hydroxyphenylmethane with naphthoquinone-1,1,2-diazide-5-sulfonyl chloride is: It has an excellent effect of improving film forming properties.
- the amount of the component (B) is preferably 0.5 to 20% by mass relative to the component (A), More preferably, it is 5 to 15% by mass.
- the base material of the present invention may further contain an additive that is miscible with the component (A) or the like as long as the effects of the present invention are not impaired.
- an additive that is miscible with the component (A) or the like as long as the effects of the present invention are not impaired.
- surfactants to improve coating properties and prevent striations
- light-absorbing substances that absorb exposure light and can prevent standing waves and irregular reflection caused by reflection from the substrate
- Additional resins to improve performance, dissolution inhibitors, plasticizers, stabilizers, colorants, anti-halation agents and the like.
- surfactant examples include a fluorine-based surfactant such as XR-104 (manufactured by Dainippon Ink and Chemicals, Inc.). These surfactants may be used alone or in combination of two or more.
- the light-absorbing substance can be arbitrarily selected from those used so far as components of the base material and the antireflection film. These light-absorbing substances may be used alone or in combination of two or more.
- the base material of the present invention is preferably used in the form of a solution by dissolving any of the above-mentioned components (A) and (B) in an appropriate solvent.
- Examples of such a solvent include ketones such as acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, methyl amyl ketone, methyl isoamyl ketone, 1,1,1-trimethylacetone, and ethylene glycol and ethylene glycol.
- ketones such as acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, methyl amyl ketone, methyl isoamyl ketone, 1,1,1-trimethylacetone, and ethylene glycol and ethylene glycol.
- Esters such as methyl propionate and ethyl 3-ethoxypropionate can be mentioned. These may be used alone or as a mixture of two or more.
- the base material of the present invention can be used for any resist composition, whether negative or positive. Select a commercially available resist composition according to the exposure light source Can be used.
- the base material of the present invention may be used as a base material.
- the base material include a non-chemically amplified positive resist composition containing a naphthoquinone diazide compound and a nopolak resin, and a resin whose solubility is changed by the action of an acid.
- a chemically amplified resist composition containing an acid generator component that generates an acid upon exposure to light are examples of the base material.
- a chemically amplified resist composition is preferably used because of its excellent fine resolution.
- the chemically amplified resist composition includes a positive resist composition containing an acid generator, and an acid-insoluble resin having an acid-dissociable, dissolution-inhibiting group and having an acid-soluble solubility that increases with acid.
- a negative type containing a generator, a crosslinking agent, and an alkali-soluble resin.
- the acid when an acid is generated from an acid generator by exposure during the formation of a resist pattern, the acid becomes alkali-soluble by dissociating an acid dissociable, dissolution inhibiting group.
- the negative type when an acid is generated by exposure, the acid acts to cause crosslinking between the soluble resin and the crosslinking agent, so that the resin becomes insoluble.
- a composition containing polyhydroxystyrene having a dissolution inhibiting group such as a t-butoxycarbonyl group or the like is known.
- an aliphatic polycyclic group such as an adamantyl group may be introduced into a side chain of a methylacrylic resin, or an aliphatic polycyclic group such as a norpolonyl group may be introduced into a main chain.
- Those containing a resin or the like containing a cyclic group are known.
- a multilayer process such as a two-layer resist method or a three-layer resist method is performed, it is preferable to use a chemically amplified resist containing a silicon-containing polymer.
- the underlayer film obtained by using the base material of the present invention is insoluble in an alkali developing solution used when developing the photoresist layer after exposure, and can be etched by oxygen plasma. At the same time, it has high filling characteristics for the substrate. It also has high etching resistance to fluorocarbon-based gases and the like, and reduces the occurrence of sublimates during film formation. When an excimer laser such as KrF or ArF or a light source having a shorter wavelength is used, an antireflection effect is also exhibited.
- the base material of the present invention is a base material for forming an anti-reflection film or a planarizing film as described above, or a lower layer film such as an organic film in a multilayer process such as a two-layer resist method or a three-layer resist method. It is preferably used as
- the thickness of the lower layer film is preferably 30 to 500 nm, more preferably 50 to 250 nm when used as an anti-reflection film, and preferably 50 to 250 nm when used as a flattening film.
- the thickness is 100 to 100 nm, more preferably 200 to 600 nm, and preferably 200 nm or more when used as an organic film in a multilayer process.
- the method for forming a multilayer resist pattern of the present invention can be carried out, for example, as follows using the base material of the present invention.
- a substrate material solution prepared by dissolving the substrate material of the present invention in the above-mentioned solvent is spin-coated on a substrate such as silicon wafer by a spinner or the like.
- a film is formed by heating at a temperature of 200 or more, preferably 200 to 300, preferably a film of 200 nm or more, more preferably 250 to 500 nm.
- a thick lower layer film is formed.
- This lower layer film becomes insoluble in alkali by film formation (firing) by heating.
- resistance to organic solvents is increased, and intermixing is less likely to occur when a photoresist composition is formed by applying a resist composition on an underlayer film.
- the substrate is not particularly limited, and a conventionally known substrate can be used.
- a substrate for an electronic component or a substrate on which a predetermined wiring pattern or a step is formed can be exemplified.
- the substrate material examples include metals such as silicon wafer, copper, chromium, iron, and aluminum, and glass.
- the wiring pattern for example, silicon, copper, solder, chromium, aluminum, nickel, gold, or an alloy thereof can be used.
- a resist composition is applied on the lower layer film with a spinner or the like, and then, the prebaking is performed for 40 to 120 seconds, preferably 60 to 120, under a temperature condition of 80 to 15 Ot :. Apply for 90 seconds to form a photoresist layer.
- the thickness of the photoresist layer is preferably between 10 and 500 nm, more preferably between 30 and 300 nm. In particular, when a chemically amplified resist containing a silicon-containing polymer is used, the thickness is preferably 100 to 200 nm, and more preferably 130 to 170 nm.
- a resist film may be provided directly on the lower layer film.
- a silicon-based film can be interposed on the lower film, and a resist film can be provided thereon.
- the photoresist layer is selectively exposed to KrF excimer laser light via a desired mask pattern by, for example, a KrF exposure device.
- PEB post-exposure bake
- after exposure may be applied at a temperature of 80 to 150 for 40 to 120 seconds, preferably 60 to 90 seconds. preferable.
- a KrF or ArF excimer laser is particularly useful as a light source used for exposure.
- an alkali developing solution for example, an aqueous solution of 0.05 to 10% by mass, preferably 0.05 to 3% by mass of tetramethylammonium hydroxide.
- the resist is a positive type
- the exposed portion is selectively dissolved and removed if the resist is a negative type, and a resist pattern faithful to the mask pattern is formed. In this way, a resist pattern faithful to the mask pattern is formed on the photoresist layer.
- the lower layer film is etched with oxygen plasma using the obtained resist pattern as a mask pattern, and the resist pattern is transferred to the lower layer film.
- the lower film is similarly etched with oxygen plasma, and the resist pattern is formed on the lower film. Transcribe.
- the conditions for the etching with the oxygen plasma and the fluorocarbon gas can be arbitrarily selected as necessary.
- a Since the embedding characteristics of the layer film are high, there are effects such as flattening. Further, since the lower layer film has high etching resistance to a fluorocarbon-based gas or the like, the substrate can be etched using this film as a mask. Further, even when heating at a high temperature when forming the lower layer film, sublimates are hardly generated, and the production yield of semiconductor devices and the like is improved. In addition, since it has an excellent anti-reflection effect with respect to a light source having a short wavelength such as KrF or ArF, a resist pattern having high perpendicularity and faithful to a mask pattern can be formed on a photoresist layer.
- the obtained precipitate (nopolak resin (a1)) was subjected to gel permeation chromatography (GPC) using polystyrene as a standard under the following apparatus and conditions, and the Mw of the nopolak resin (a1) was 20000, the content of low nuclei having a molecular weight of 500 or less in the nopolak resin (a1) was 0.9% by mass.
- GPC gel permeation chromatography
- UV41 (measured at 280 nm)
- the obtained base material solution was applied on a silicon wafer using a spinner, and baked at 250 at 90 seconds to form a film, thereby forming a lower layer film having a thickness of 50 Onm.
- a positive resist composition containing a silicon-containing polymer was applied on the lower film using a spinner, and baked at 90 for 90 seconds to form a photoresist layer having a film thickness of 150 nm.
- the L & S pattern was dry-etched with a plasma obtained from a mixed gas of oxygen and nitrogen using a high-vacuum RIE system (manufactured by Tokyo Ohka Kogyo Co., Ltd.). A highly reliable L & S pattern was formed. Comparative Example 1
- a resist pattern was formed in the same manner as in Example 1 except that the conventional base material solution consisting of) was used.
- a resist pattern was prepared in the same manner as in Example 1, except that a conventional underlayer solution in which a crosslinking material was added to a copolymer of benzyl methacrylate and methacrylic acid was used instead of the underlayer solution of Example 1. Was formed.
- a wafer with an oxide film on which a hole pattern of 200 nm was formed was prepared, the base material solution of Example 1 was applied to a thickness of 50 nm, and heat treatment was performed at 250 nm. Thereafter, the wafer was cut, and the shape of the hole pattern was observed. As a result, it was confirmed that sufficient embedding was completed in a state where no bubbles or the like were generated. In the base material solutions of Comparative Examples 1 and 2, a cavity was formed at the bottom of the hole, and sufficient filling was not performed.
- Example 1 the amount of the sublimate attached to the top plate about 30 cm above the substrate was determined by dissolving the sublimate in PGMEA during film formation using the base material solution. However, as measured by gas chromatography, the amount of the sublimate of the base material solution used in Example 1 was 1/20 or less as compared with the base material solutions of Comparative Examples 1 and 2.
- the underlayer film having high embedding characteristics can be formed by the resin for a base material of the present invention, the base material containing the resin, and the resist pattern forming method using the base material.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials For Photolithography (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/553,159 US20060281029A1 (en) | 2003-04-18 | 2004-04-14 | Resin for under-layer material, under-layer material, laminate and method for forming resist pattern |
EP04727426A EP1616888B1 (en) | 2003-04-18 | 2004-04-14 | Resin for under-layer material, under-layer material, laminate and method for forming resist pattern |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-114044 | 2003-04-18 | ||
JP2003114044A JP4302423B2 (ja) | 2003-04-18 | 2003-04-18 | 下地材用樹脂、下地材、及び多層レジストパターン形成方法 |
Publications (1)
Publication Number | Publication Date |
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WO2004092238A1 true WO2004092238A1 (ja) | 2004-10-28 |
Family
ID=33296138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/005330 WO2004092238A1 (ja) | 2003-04-18 | 2004-04-14 | 下地材用樹脂、下地材、積層体、及び多層レジストパターン形成方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060281029A1 (ja) |
EP (1) | EP1616888B1 (ja) |
JP (1) | JP4302423B2 (ja) |
TW (1) | TWI276919B (ja) |
WO (1) | WO2004092238A1 (ja) |
Families Citing this family (1)
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CN110395068B (zh) * | 2019-07-16 | 2022-02-08 | 福州恒美环保科技有限公司 | 一种用于建筑墙面的热转印方法 |
Citations (7)
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JPS6199351A (ja) * | 1984-10-19 | 1986-05-17 | Sumitomo Chem Co Ltd | 配線パタ−ン形成方法 |
JPS62159143A (ja) * | 1985-12-30 | 1987-07-15 | Hitachi Chem Co Ltd | レジストの下層材料用組成物 |
JPS62174737A (ja) * | 1986-01-29 | 1987-07-31 | Nippon Telegr & Teleph Corp <Ntt> | パタン形成方法 |
JPH01177032A (ja) * | 1987-12-28 | 1989-07-13 | Japan Synthetic Rubber Co Ltd | 感放射線性樹脂組成物 |
JPH0260915A (ja) * | 1988-08-29 | 1990-03-01 | Japan Synthetic Rubber Co Ltd | ノボラック樹脂中の低核体の除去方法 |
JPH03125152A (ja) * | 1989-10-09 | 1991-05-28 | Mitsubishi Electric Corp | フォトレジスト塗布組成物 |
JPH11236367A (ja) * | 1997-12-15 | 1999-08-31 | Tokyo Ohka Kogyo Co Ltd | ポリフェノールジエステル化物の製造方法およびポジ型感光性組成物 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5948847A (en) * | 1996-12-13 | 1999-09-07 | Tokyo Ohka Kogyo Co., Ltd. | Undercoating composition for photolithographic patterning |
US5985524A (en) * | 1997-03-28 | 1999-11-16 | International Business Machines Incorporated | Process for using bilayer photoresist |
EP0908784A1 (en) * | 1997-10-08 | 1999-04-14 | Agfa-Gevaert N.V. | A method of making positive working printing plates from a light sensitive imaging element |
US6187505B1 (en) * | 1999-02-02 | 2001-02-13 | International Business Machines Corporation | Radiation sensitive silicon-containing resists |
US6146793A (en) * | 1999-02-22 | 2000-11-14 | Arch Specialty Chemicals, Inc. | Radiation sensitive terpolymer, photoresist compositions thereof and 193 nm bilayer systems |
TW594390B (en) * | 2001-05-21 | 2004-06-21 | Tokyo Ohka Kogyo Co Ltd | Negative photoresist compositions for the formation of thick films, photoresist films and methods of forming bumps using the same |
-
2003
- 2003-04-18 JP JP2003114044A patent/JP4302423B2/ja not_active Expired - Lifetime
-
2004
- 2004-04-14 EP EP04727426A patent/EP1616888B1/en not_active Expired - Lifetime
- 2004-04-14 US US10/553,159 patent/US20060281029A1/en not_active Abandoned
- 2004-04-14 WO PCT/JP2004/005330 patent/WO2004092238A1/ja active Application Filing
- 2004-04-16 TW TW093110772A patent/TWI276919B/zh active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6199351A (ja) * | 1984-10-19 | 1986-05-17 | Sumitomo Chem Co Ltd | 配線パタ−ン形成方法 |
JPS62159143A (ja) * | 1985-12-30 | 1987-07-15 | Hitachi Chem Co Ltd | レジストの下層材料用組成物 |
JPS62174737A (ja) * | 1986-01-29 | 1987-07-31 | Nippon Telegr & Teleph Corp <Ntt> | パタン形成方法 |
JPH01177032A (ja) * | 1987-12-28 | 1989-07-13 | Japan Synthetic Rubber Co Ltd | 感放射線性樹脂組成物 |
JPH0260915A (ja) * | 1988-08-29 | 1990-03-01 | Japan Synthetic Rubber Co Ltd | ノボラック樹脂中の低核体の除去方法 |
JPH03125152A (ja) * | 1989-10-09 | 1991-05-28 | Mitsubishi Electric Corp | フォトレジスト塗布組成物 |
JPH11236367A (ja) * | 1997-12-15 | 1999-08-31 | Tokyo Ohka Kogyo Co Ltd | ポリフェノールジエステル化物の製造方法およびポジ型感光性組成物 |
Non-Patent Citations (1)
Title |
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See also references of EP1616888A4 * |
Also Published As
Publication number | Publication date |
---|---|
TWI276919B (en) | 2007-03-21 |
JP2004317930A (ja) | 2004-11-11 |
US20060281029A1 (en) | 2006-12-14 |
JP4302423B2 (ja) | 2009-07-29 |
TW200424774A (en) | 2004-11-16 |
EP1616888B1 (en) | 2012-07-11 |
EP1616888A1 (en) | 2006-01-18 |
EP1616888A4 (en) | 2007-04-25 |
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