WO2013129313A1 - 酸性処理したモノアルキルナフタレンホルムアルデヒド樹脂 - Google Patents
酸性処理したモノアルキルナフタレンホルムアルデヒド樹脂 Download PDFInfo
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- WO2013129313A1 WO2013129313A1 PCT/JP2013/054763 JP2013054763W WO2013129313A1 WO 2013129313 A1 WO2013129313 A1 WO 2013129313A1 JP 2013054763 W JP2013054763 W JP 2013054763W WO 2013129313 A1 WO2013129313 A1 WO 2013129313A1
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- monoalkylnaphthalene
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- 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
- C08G10/00—Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or halogenated aromatic hydrocarbons only
- C08G10/02—Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or halogenated aromatic hydrocarbons only of aldehydes
- C08G10/04—Chemically-modified polycondensates
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- 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
- C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
- C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
- C08G14/04—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/18—Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or their halogen derivatives only
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/34—Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C09D161/04, C09D161/18 and C09D161/20
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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
- G03F7/20—Exposure; Apparatus therefor
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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
- G03F7/091—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by antireflection means or light filtering or absorbing means, e.g. anti-halation, contrast enhancement
Definitions
- the present invention relates to a novel resin, and in particular, relates to an acid-treated monoalkylnaphthalene formaldehyde resin.
- electrical insulating materials for example, electrical insulating materials, resist resins, semiconductor sealing resins, printed wiring board adhesives, matrix resins for electrical laminates mounted on electrical equipment / electronic equipment / industrial equipment, etc., electrical equipment / electronic equipment / Prepreg matrix resin, build-up laminated board material, resin for fiber reinforced plastic, liquid crystal display panel sealing resin, paint, various coating agents, adhesives, semiconductor coating agents or semiconductor manufacturing
- the resin used as a resist resin in is required to be resistant to thermal decomposition (thermal decomposability) and to have good solubility in a solvent for easy handling.
- an aromatic obtained by reacting a polycyclic aromatic hydrocarbon mainly composed of monoalkylnaphthalene or dialkylnaphthalene with paraformaldehyde in the presence of aromatic monosulfonic acid.
- a hydrocarbon resin see Patent Document 1, a methoxymethylene naphthalene compound, and a compound having a phenolic hydroxyl group such as phenol, cresol or naphthol in the presence of diethyl sulfate, and a compound having naphthalene and a phenolic hydroxyl group;
- a phenol resin having a structure in which is bonded via a methylene group see Patent Document 2 and the like are known.
- R 1 is a monovalent atom or group
- k is an integer of 0 to 4, provided that when k is 2 to 4, a plurality of R 1 may be the same or different.
- R 2 R 5 is independently a hydroxy group or a monovalent atom or group.
- Patent Documents 1 and 2 and the modified resins described in Patent Documents 3 and 4 are still insufficient in thermal decomposability.
- the acenaphthene resin having a specific structure described in Patent Document 5 has a drawback that the carbon concentration in the resin is too high and the solubility in a solvent is low.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a novel resin and a precursor thereof that are excellent in thermal decomposability and solubility in a solvent. Another object of the present invention is to provide a novel resin that can be suitably used particularly as a resin for electronic materials.
- the present inventors have acid-treated monoalkylnaphthalene formaldehyde resin obtained by reacting a compound represented by the following formula (1) and formaldehyde in the presence of a catalyst. As a result, the inventors have found that a resin obtained by doing so can solve the above-mentioned problems, and have reached the present invention.
- the present invention provides the following [1] to [17].
- [1] A resin obtained by acidic treatment of a monoalkylnaphthalene formaldehyde resin obtained by reacting a compound represented by the following formula (1) and formaldehyde in the presence of a catalyst.
- R 1 represents an alkyl group having 1 to 4 carbon atoms.
- [2] The resin according to the above [1], wherein the acidic treatment uses an acidic catalyst and a compound represented by the following formula (2).
- a represents an integer of 1 to 3
- each X independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group
- each Y independently represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group
- n represents an integer of 0 to 2.
- the compound represented by the formula (2) is at least one selected from the group consisting of phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxynaphthalene, hydroxyanthracene, methoxyanthracene, benzoxyanthracene and dihydroxyanthracene.
- the compound represented by the formula (2) is at least one selected from the group consisting of phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxynaphthalene, hydroxyanthracene, methoxyanthracene, benzoxyanthracene, and dihydroxyanthracene.
- the amount of the compound represented by the formula (2) used is 0.1 to 5 mol with respect to 1 mol of oxygen contained in the monoalkylnaphthalene formaldehyde resin, [7] or [7] 8].
- a resin for a lower layer film obtained by acid-treating a monoalkylnaphthalene formaldehyde resin obtained by reacting a compound represented by the above formula (1) and formaldehyde in the presence of a catalyst.
- the above-mentioned [10] wherein the acidic treatment is performed using an acidic catalyst and the compound represented by the formula (2) and / or is performed using an acidic catalyst and water. Lower layer resin.
- a pattern forming method comprising: forming a photoresist layer and irradiating a predetermined region of the photoresist layer with radiation after the formation.
- a lower layer film is formed on the substrate using the lower layer film forming material according to any one of [12] to [14], and a resist intermediate layer containing silicon atoms is formed on the lower layer film
- An intermediate layer film is formed by using a film material, and at least one photoresist layer is formed on the intermediate layer film. Then, a predetermined region of the photoresist layer is irradiated with radiation and subjected to alkali development to form a resist.
- the intermediate layer film is etched using the resist pattern as a mask
- the lower layer film is etched using the obtained intermediate layer film pattern as an etching mask
- the resulting lower layer film pattern is used as an etching mask.
- a pattern forming method wherein a pattern is formed on a substrate by etching.
- a novel resin excellent in thermal decomposability and solubility in a solvent and its precursor are realized. Therefore, this resin is mounted in fields where these properties are required (for example, electrical insulating materials, resist resins, semiconductor sealing resins, printed wiring board adhesives, electrical equipment / electronic equipment / industrial equipment). Electrical laminates and prepreg matrix resins, build-up laminate materials, fiber reinforced plastic resins, liquid crystal display panel sealing resins, paints, various coating agents, adhesives, electronic component laminates, molded products, It is useful as a thermosetting resin used in a coating material, a sealing material, and the like.
- the resin of this embodiment is obtained by acid-treating a monoalkylnaphthalene formaldehyde resin obtained by reacting a compound represented by the following formula (1) and formaldehyde in the presence of a catalyst.
- R 1 represents an alkyl group having 1 to 4 carbon atoms.
- the monoalkylnaphthalene formaldehyde resin used here is not particularly limited as long as it is obtained by condensation reaction of the monoalkylnaphthalene compound represented by the above formula (1) and formaldehyde in the presence of a catalyst. .
- a known method can be applied and is not particularly limited.
- a monoalkylnaphthalene formaldehyde resin can be obtained by subjecting an alkylnaphthalene compound represented by the above formula (1) and formaldehyde to a condensation reaction in the presence of a catalyst by the method described in Japanese Patent Publication No. 37-5747. it can.
- the monoalkylnaphthalene formaldehyde resin obtained by the above method can be identified by measuring gel permeation chromatography, organic element analysis, softening point, hydroxyl value and the like.
- the condensation reaction for obtaining the monoalkylnaphthalene formaldehyde resin can also be performed in the presence of alcohol.
- alcohol When alcohol coexists, the end of the resin is sealed with alcohol, making it easy to obtain a low molecular weight, low dispersion (narrow molecular weight distribution) monoalkylnaphthalene formaldehyde resin, and solvent solubility when modified as described below.
- a modified resin having a good low melt viscosity tends to be obtained.
- the alcohol used here is not particularly limited, and examples thereof include monools having 1 to 12 carbon atoms and diols having 1 to 12 carbon atoms. These alcohols can be used individually by 1 type or in combination of 2 or more types as appropriate.
- propanol, butanol, octanol, and 2-ethylhexanol are more preferable from the viewpoint of productivity of the monoalkylnaphthalene formaldehyde resin.
- the amount of alcohol used is not particularly limited.
- the alcohol hydroxyl group is 1 to 10 equivalents per 1 mol of the monoalkylnaphthalene compound represented by the above formula (1). Is preferred.
- the monoalkylnaphthalene compound represented by the above formula (1) is limited to a monoalkyl-substituted one.
- the alkyl group include an alkyl group having 1 to 4 carbon atoms, specifically a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, and the like.
- a methyl group or an ethyl noble is preferable, and a methyl group is more preferable.
- the monoalkylnaphthalene compound represented by the above formula (1) can be used singly or in appropriate combination of two or more.
- the molecular weight of the monoalkylnaphthalene formaldehyde resin used as a starting material is not particularly limited, but the number average molecular weight (Mn) is preferably 300 to 800, more preferably 350 to 700, and still more preferably 400 to 600.
- the weight average molecular weight (Mw) of the monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 300 to 2000, more preferably 350 to 1750, and further preferably 400 to 1500. By being each in the said preferable range, it exists in the tendency for high viscosity to be suppressed and it exists in the tendency for heat resistance to be improved.
- the dispersity Mw / Mn is not particularly limited, but is preferably 1.2 to 2.5, more preferably 1.25 to 2.25, and further preferably 1.3 to 2.0.
- the softening point of the starting monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 120 ° C. or lower, more preferably 110 ° C. or lower, more preferably 100 ° C. or lower, from the viewpoint of thermal decomposition resistance and handling. Is more preferable.
- the hydroxyl value of the monoalkylnaphthalene formaldehyde resin used as a starting material is not particularly limited, but is preferably 10 to 50 mgKOH / g from the viewpoint of thermal decomposition resistance and solubility in a solvent, and 12.5 to 45 mgKOH / g. Is more preferable, and 15 to 40 mg KOH / g is more preferable.
- the resin of the present embodiment is obtained by acid-treating the above-described monoalkylnaphthalene formaldehyde resin or by further acid-treating the acid-treated one.
- the acid treatment includes the following.
- a represents an integer of 1 to 3
- each X independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group
- each Y independently represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group
- n represents an integer of 0 to 2.
- the monoalkylnaphthalene formaldehyde resin and the compound represented by the above formula (2) undergo a modification condensation reaction, and the thermal decomposability and the hydroxyl value increase. Thereby, the thermal decomposability of the obtained resin is improved.
- this reaction (A) is referred to as “denaturation”.
- the monoalkylnaphthalene formaldehyde resin the naphthalene ring is crosslinked with — (CH 2 ) 1 — and / or CH 2 A—.
- l represents a number from 1 to 10
- A represents — (OCH 2 ) m —
- m represents a number from 0 to 10, respectively.
- the bond between oxymethylenes and the like not via the naphthalene ring is reduced, and l and / or m is reduced, that is, the acetal bond at the position via the naphthalene ring is reduced.
- oxygen concentration becomes low and a softening point rises.
- this reaction (B) is referred to as “deacetal bond reaction”.
- specific embodiments obtained by the operations (A) and (B) will be described in detail.
- This modified monoalkylnaphthalene formaldehyde resin is obtained by subjecting the monoalkylnaphthalene formaldehyde resin to the acid treatment (A). That is, the alkylnaphthalene formaldehyde resin and the compound represented by the above formula (2) are heated in the presence of an acidic catalyst to modify the monoalkylnaphthalene formaldehyde resin.
- the compound represented by the above formula (2) used for modification of the monoalkylnaphthalene formaldehyde resin is such that a is 1 to 2, X is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, It is preferably a 6-10 aryl group or a cyclohexyl group, b is 0-2, and Y is an alkyl group having 1-4 carbon atoms, an aryl group having 6-10 carbon atoms, or a cyclohexyl group.
- n is 0-2.
- Examples of the compound represented by the above formula (2) include phenol, methoxyphenol, benzoxyphenol, catechol, resorcinol, hydroquinone, cresol, phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxynaphthalene, hydroxyanthracene, Examples include methoxyanthracene, benzoxyanthracene, and dihydroxyanthracene. These can be used individually by 1 type or in combination of 2 or more types as appropriate.
- phenol derivatives containing a conjugated structure involving at least two unshared electron pairs on the benzene ring tend to be more thermally decomposable, so phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxy Naphthalene, hydroxyanthracene, methoxyanthracene, benzoxyanthracene and dihydroxyanthracene are preferred.
- phenylphenol, naphthol, dihydroxynaphthalene, hydroxyanthracene, and dihydroxyanthracene are more preferable because those having a hydroxy group tend to be excellent in crosslinkability with an acid crosslinking agent.
- the amount of the compound represented by the above formula (2) can be appropriately set and is not particularly limited, but is 0.1 to 5 mol with respect to 1 mol of oxygen contained in the monoalkylnaphthalene formaldehyde resin. Is preferable, 0.2 to 4 mol is more preferable, and 0.3 to 3 mol is more preferable. When used in the above preferred range, the yield of the resulting modified monoalkylnaphthalene formaldehyde resin tends to be maintained relatively high and the amount of the compound represented by (2) remaining unreacted is reduced. can do.
- the number of moles of oxygen contained in the monoalkylnaphthalene formaldehyde resin can be calculated according to the following formula by measuring the oxygen concentration (% by mass) in the resin by organic elemental analysis.
- Number of moles of oxygen contained (mol) Amount of resin used (g) ⁇ oxygen concentration (mass%) / 16
- the modification treatment is usually performed at normal pressure in the presence of an acidic catalyst, and is performed while heating to reflux at a temperature higher than the temperature at which the raw materials used are compatible (usually 80 to 300 ° C.) or distilling off the generated water. Further, this modification treatment may be performed under pressure. If necessary, an inert gas such as nitrogen, helium, or argon may be passed through the system.
- an inert gas such as nitrogen, helium, or argon may be passed through the system.
- a solvent inert to the condensation reaction can also be used.
- the solvent include aromatic hydrocarbons such as toluene, ethylbenzene and xylene; saturated aliphatic hydrocarbons such as heptane and hexane; alicyclic hydrocarbons such as cyclohexane; ethers such as dioxane and dibutyl ether; 2-propanol and the like Alcohols such as methyl isobutyl ketone, carboxylic acid esters such as ethyl propionate, and carboxylic acids such as acetic acid.
- aromatic hydrocarbons such as toluene, ethylbenzene and xylene
- saturated aliphatic hydrocarbons such as heptane and hexane
- alicyclic hydrocarbons such as cyclohexane
- ethers such as dioxane and dibutyl ether
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid, oxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, formic acid
- p- Organic acids such as toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid, naphthalenedisulfonic acid, zinc chloride, aluminum chloride, iron chloride, three Examples include Lewis acids such as boron fluoride, or solid acids such as silicotungsten, sodium boron fluoride, sodium boron fluoride, sodium boron fluoride, sodium boron fluoride, sodium silicatesulfonic acid, sodium chloride
- an acidic catalyst can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the amount of the acidic catalyst used in the modification treatment can be appropriately set and is not particularly limited, but is preferably 0.0001 to 100 parts by mass with respect to 100 parts by mass of the monoalkylnaphthalene formaldehyde resin. 0.001 to 85 parts by mass is more preferable, and 0.001 to 70 parts by mass is even more preferable. By using it in the above preferred range, an appropriate reaction rate tends to be obtained, and an increase in the resin viscosity based on the high reaction rate tends to be suppressed.
- the acidic catalyst may be charged in a lump or divided.
- the reaction time in the modification treatment can be appropriately set and is not particularly limited, but is preferably 0.5 to 20 hours, more preferably 1 to 15 hours, and further preferably 2 to 10 hours. By setting it as said preferable range, it exists in the tendency which resin which has the target property tends to be obtained economically and industrially.
- the reaction temperature in the modification treatment can be appropriately set and is not particularly limited, but is preferably 80 to 300 ° C, more preferably 85 to 270 ° C, and further preferably 90 to 240 ° C. By setting it as said preferable range, it exists in the tendency which resin which has the target property tends to be obtained economically and industrially.
- a modified monoalkylnaphthalene formaldehyde resin can be obtained by removing the acidic catalyst, water, solvent and / or unreacted raw material according to a conventional method.
- the solvent is added and diluted as necessary, and the acidic catalyst is completely removed by washing with water, and then the two-phase separation is performed by leaving the resin, and the resin phase is an oil phase.
- the added solvent and / or unreacted raw material is removed by a general method such as distillation to obtain a modified monoalkylnaphthalene formaldehyde resin.
- the modified monoalkylnaphthalene formaldehyde resin thus obtained has improved thermal decomposability compared to the monoalkylnaphthalene formaldehyde resin used as a raw material.
- the thermal decomposability and the hydroxyl value are increased as compared with the monoalkylnaphthalene formaldehyde resin used as a raw material.
- the amount used is 0.05 parts by mass of the acidic catalyst, the reaction time is 5 hours, and the reaction temperature is 200 ° C., the thermal decomposability is increased by about 1 to 50% and the hydroxyl value is increased by about 1 to 300 mgKOH / g. can get.
- the molecular weight of the modified monoalkylnaphthalene formaldehyde resin is not particularly limited, but the number average molecular weight (Mn) is preferably 250 to 1200, more preferably 275 to 1100, and further preferably 300 to 1000.
- the weight average molecular weight (Mw) of the modified monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 300 to 3500, more preferably 350 to 3250, and further preferably 400 to 3000. By being each in the said preferable range, it exists in the tendency for high viscosity to be suppressed and it exists in the tendency for heat resistance to be improved.
- the dispersity Mw / Mn is not particularly limited, but is preferably 1.2 to 3.0, more preferably 1.25 to 2.75, and further preferably 1.3 to 2.5.
- the softening point of the modified monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 60 to 240 ° C., more preferably 70 to 230 ° C., and still more preferably 80 to 220 ° C. from the viewpoint of thermal decomposition resistance and handling. .
- the hydroxyl value of the modified monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 60 to 260 mgKOH / g, more preferably 70 to 250 mgKOH / g, from the viewpoint of thermal decomposition resistance and solubility in a solvent. More preferred is ⁇ 240 mg KOH / g.
- the carbon concentration of the modified monoalkylnaphthalene formaldehyde resin is preferably 75.0 to 95.0% by mass, and preferably 77.5 to 94.0% by mass from the viewpoint of thermal decomposability and solubility in a solvent. More preferably, the content is 80.0 to 93.0% by mass.
- the oxygen concentration of the modified monoalkylnaphthalene formaldehyde resin is preferably 2.5 to 15.0% by mass, and preferably 3.0 to 13.0% by mass from the viewpoint of thermal decomposability and solubility in a solvent. More preferably, the content is 3.5 to 11.0% by mass.
- This deacetal-bonded alkylnaphthalene formaldehyde resin is obtained by subjecting the monoalkylnaphthalene formaldehyde resin to the acid treatment (B). That is, it can be obtained by treating the alkylnaphthalene formaldehyde resin in the presence of water and an acidic catalyst to reduce acetal bonds.
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid, oxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, formic acid
- p- Organic acids such as toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid, naphthalenedisulfonic acid, zinc chloride, aluminum chloride, iron chloride, three Examples include Lewis acids such as boron fluoride, or solid acids such as
- an acidic catalyst can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the deacetal bond reaction treatment in the presence of water and an acidic catalyst is usually performed at normal pressure in the presence of an acidic catalyst, and the water to be used is used above the temperature at which the raw materials used are compatible (usually 80 to 300 ° C.). It is carried out while dripping or spraying as water vapor.
- water in the system may be distilled off or refluxed, it is preferably distilled off together with a low-boiling component such as formaldehyde generated in the reaction from the viewpoint of efficiently removing the acetal bond.
- the deacetal bond reaction treatment may be performed under pressure. If necessary, an inert gas such as nitrogen, helium, or argon may be passed through the system.
- a solvent inert to the reaction can also be used.
- the solvent include aromatic hydrocarbons such as toluene, ethylbenzene and xylene; saturated aliphatic hydrocarbons such as heptane and hexane; alicyclic hydrocarbons such as cyclohexane; ethers such as dioxane and dibutyl ether; 2-propanol and the like Alcohols such as methyl isobutyl ketone, carboxylic acid esters such as ethyl propionate, and carboxylic acids such as acetic acid.
- aromatic hydrocarbons such as toluene, ethylbenzene and xylene
- saturated aliphatic hydrocarbons such as heptane and hexane
- alicyclic hydrocarbons such as cyclohexane
- ethers such as dioxane and dibutyl ether
- Alcohols
- the amount of the acidic catalyst used in the deacetal bond reaction treatment can be appropriately set and is not particularly limited, but is 0.0001 to 100 parts by mass with respect to 100 parts by mass of the monoalkylnaphthalene formaldehyde resin. 0.001 to 85 parts by mass is preferable, and 0.001 to 70 parts by mass is more preferable. By using it in the above preferred range, an appropriate reaction rate tends to be obtained, and an increase in the resin viscosity based on the high reaction rate tends to be suppressed.
- the acidic catalyst may be charged in a lump or divided.
- the water used in the deacetal bond reaction treatment is not particularly limited as long as it can be used industrially.
- tap water, distilled water, ion-exchange water, pure water, or ultrapure water can be used.
- the amount of water used in the deacetal bond reaction treatment can be appropriately set and is not particularly limited, but is preferably 0.1 to 10,000 parts by mass with respect to 100 parts by mass of the monoalkylnaphthalene formaldehyde resin. More preferred is ⁇ 5000 parts by mass, and further more preferred is 10 to 3,000 parts by mass.
- the treatment time of the deacetal bond reaction treatment can be appropriately set and is not particularly limited, but is preferably 0.5 to 20 hours, more preferably 1 to 15 hours, and further preferably 2 to 10 hours. By setting it as said preferable range, it exists in the tendency which resin which has the target property tends to be obtained economically and industrially.
- the treatment temperature of the deacetal bond reaction treatment can be appropriately set and is not particularly limited, but is preferably 80 to 300 ° C, more preferably 85 to 270 ° C, and further preferably 90 to 240 ° C. By setting it as said preferable range, it exists in the tendency which resin which has the target property tends to be obtained economically and industrially.
- the deacetal bond monoalkylnaphthalene formaldehyde resin can be obtained by removing the acidic catalyst, water, solvent and / or unreacted raw material according to a conventional method.
- the solvent is added and diluted as necessary, and the acidic catalyst is completely removed by washing with water, and then the two-phase separation is performed by leaving the resin, and the resin phase is an oil phase.
- the added solvent and the like are removed by a general method such as distillation to obtain a deacetal-bonded monoalkylnaphthalene formaldehyde resin.
- the deacetal-bonded monoalkylnaphthalene formaldehyde resin thus obtained has a lower oxygen concentration and a higher softening point than the monoalkylnaphthalene formaldehyde resin used as a raw material.
- the oxygen concentration is as low as 0.1 to 8.0% by weight, A product whose softening point is increased by about 3 to 100 ° C. is obtained.
- the molecular weight of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but the number average molecular weight (Mn) is preferably 250 to 1500, more preferably 275 to 1400, and further preferably 300 to 1300.
- the weight average molecular weight (Mw) of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 300 to 5000, more preferably 350 to 4500, and further preferably 400 to 4000. By being each in the said preferable range, it exists in the tendency for high viscosity to be suppressed and it exists in the tendency for heat resistance to be improved.
- the dispersity Mw / Mn is not particularly limited, but is preferably 1.2 to 7.0, more preferably 1.25 to 6.75, and further preferably 1.3 to 6.5.
- the softening point of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 50 to 150 ° C., more preferably 60 to 140 ° C., and more preferably 70 to 130 ° C. from the viewpoint of thermal decomposition resistance and handling. Further preferred.
- the hydroxyl value of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 5 to 50 mgKOH / g, and preferably 7.5 to 45 mgKOH / g from the viewpoint of thermal decomposition resistance and solubility in a solvent. More preferred is 10 to 40 mg KOH / g.
- the carbon concentration of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is preferably 75.0 to 95.0% by mass from the viewpoint of thermal decomposability and solubility in a solvent, and 77.5 to 94.0% by mass. It is more preferable that the content is 80.0 to 93.0% by mass.
- the oxygen concentration of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is preferably 2.5 to 15.0% by mass, and preferably 3.0 to 13.0% by mass from the viewpoint of thermal decomposability and solubility in a solvent. More preferably, it is 3.5 to 11.0% by mass.
- the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is obtained by subjecting the monoalkylnaphthalene formaldehyde resin to the acid treatment (B) and then the acid treatment (A). That is, the deacetal-linked monoalkylnaphthalene formaldehyde resin and the compound represented by the following formula (2) are heated in the presence of an acidic catalyst to modify the deacetal-linked monoalkylnaphthalene formaldehyde resin.
- a represents an integer of 1 to 3
- each X independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group
- each Y independently represents an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group
- n represents an integer of 0 to 2.
- the compound represented by the above formula (2) used for the modification of the deacetal-bonded monoalkylnaphthalene formaldehyde resin is such that a is 1 to 2, X is a hydrogen atom, and an alkyl group having 1 to 4 carbon atoms. , An aryl group having 6 to 10 carbon atoms or a cyclohexyl group, wherein b is 0 to 2, Y is an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group.
- n is 0-2.
- Examples of the compound represented by the above formula (2) include phenol, methoxyphenol, benzoxyphenol, catechol, resorcinol, hydroquinone, cresol, phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxynaphthalene, hydroxyanthracene, Examples include methoxyanthracene, benzoxyanthracene, and dihydroxyanthracene. These can be used individually by 1 type or in combination of 2 or more types as appropriate.
- phenol derivatives containing a conjugated structure involving at least two unshared electron pairs on the benzene ring tend to be more thermally decomposable, so phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxy Naphthalene, hydroxyanthracene, methoxyanthracene, benzoxyanthracene and dihydroxyanthracene are preferred.
- phenylphenol, naphthol, dihydroxynaphthalene, hydroxyanthracene, and dihydroxyanthracene are more preferable because those having a hydroxy group tend to be excellent in crosslinkability with an acid crosslinking agent.
- the usage-amount of the compound represented by the said Formula (2) can be set suitably, it does not specifically limit, 0.1 mol with respect to 1 mol of oxygen moles contained in a deacetal bond monoalkyl naphthalene formaldehyde resin. -5 mol is preferable, 0.2-4 mol is more preferable, and 0.3-3 mol is more preferable.
- the yield of the resulting modified deacetal-bonded monoalkylnaphthalene formaldehyde resin tends to be maintained relatively high and remains unreacted in the compound represented by (2) above. The amount can be reduced.
- the modification treatment after deacetalization is usually performed at normal pressure in the presence of an acidic catalyst, and is performed while heating to reflux at a temperature not lower than the temperature at which the raw materials used are compatible (usually 80 to 300 ° C.) or distilling off the generated water. . Further, this modification treatment may be performed under pressure. If necessary, an inert gas such as nitrogen, helium, or argon may be passed through the system.
- an inert gas such as nitrogen, helium, or argon may be passed through the system.
- a solvent inert to the condensation reaction can also be used.
- the solvent include aromatic hydrocarbons such as toluene, ethylbenzene and xylene; saturated aliphatic hydrocarbons such as heptane and hexane; alicyclic hydrocarbons such as cyclohexane; ethers such as dioxane and dibutyl ether; 2-propanol and the like Alcohols such as methyl isobutyl ketone, carboxylic acid esters such as ethyl propionate, and carboxylic acids such as acetic acid.
- aromatic hydrocarbons such as toluene, ethylbenzene and xylene
- saturated aliphatic hydrocarbons such as heptane and hexane
- alicyclic hydrocarbons such as cyclohexane
- ethers such as dioxane and dibutyl ether
- the acid catalyst used for the modification treatment after deacetalization may be any one known in the art and is not particularly limited, but is preferably an inorganic acid, an organic acid, a Lewis acid, or a solid acid.
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid, oxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, formic acid
- p- Organic acids such as toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid, naphthalenedisulfonic acid, zinc chloride, aluminum chloride, iron chloride, three Examples include Lewis acids such as boron fluoride, or
- an acidic catalyst can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the amount of the acidic catalyst used in the modification treatment after deacetalization can be appropriately set and is not particularly limited, but is 0.0001 to 100 masses with respect to 100 mass parts of deacetal-bonded monoalkylnaphthalene formaldehyde resin. Part, preferably 0.001 to 85 parts by weight, and more preferably 0.001 to 70 parts by weight. By using it in the above preferred range, an appropriate reaction rate tends to be obtained, and an increase in the resin viscosity based on the high reaction rate tends to be suppressed.
- the acidic catalyst may be charged in a lump or divided.
- the reaction time in the modification treatment after deacetalization can be appropriately set and is not particularly limited, but is preferably 0.5 to 20 hours, more preferably 1 to 15 hours, and further preferably 2 to 10 hours. . By setting it as said preferable range, it exists in the tendency which resin which has the target property tends to be obtained economically and industrially.
- the reaction temperature during the modification treatment after deacetalization can be appropriately set and is not particularly limited, but is preferably 80 to 300 ° C, more preferably 85 to 270 ° C, and further preferably 90 to 240 ° C. By setting it as said preferable range, it exists in the tendency which resin which has the target property tends to be obtained economically and industrially.
- a modified deacetal-bonded monoalkylnaphthalene formaldehyde resin can be obtained by removing the acidic catalyst, water, solvent and / or unreacted raw material according to a conventional method.
- the solvent is added and diluted as necessary, and the acidic catalyst is completely removed by washing with water, and then the two-phase separation is performed by leaving the resin, and the resin phase is an oil phase.
- the added solvent and / or unreacted raw material is removed by a general method such as distillation to obtain a modified deacetal-bonded monoalkylnaphthalene formaldehyde resin.
- the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin thus obtained has improved thermal decomposability compared to the modified monoalkylnaphthalene formaldehyde resin obtained by modifying the monoalkylnaphthalene formaldehyde resin.
- the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin has higher thermal decomposability and hydroxyl value than the deacetal-bonded monoalkylnaphthalene formaldehyde resin.
- the amount of acidic catalyst used is 0.05 parts by mass
- the reaction time is 5 hours
- the reaction temperature is 200 ° C.
- the thermal decomposability is increased by about 1 to 50%
- the hydroxyl value mgKOH / g is increased by about 1 to 300. Is obtained.
- the molecular weight of the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but the number average molecular weight (Mn) is preferably 250 to 1200, more preferably 275 to 1100, and further preferably 300 to 1000.
- the weight average molecular weight (Mw) of the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 300 to 3500, more preferably 350 to 3250, and further preferably 400 to 3000. By being each in the said preferable range, it exists in the tendency for high viscosity to be suppressed and it exists in the tendency for heat resistance to be improved.
- the dispersity Mw / Mn is not particularly limited, but is preferably 1.2 to 3.0, more preferably 1.25 to 2.75, and further preferably 1.3 to 2.5.
- the softening point of the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably 60 to 240 ° C., more preferably 70 to 230 ° C., and more preferably 80 to 220 ° C. from the viewpoint of thermal decomposition resistance and handling. Is more preferable.
- the hydroxyl value of the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is not particularly limited, but is preferably from 50 to 260 mgKOH / g, more preferably from 55 to 250 mgKOH / g, from the viewpoint of thermal decomposition resistance and solubility in a solvent. 60 to 240 mgKOH / g is more preferable.
- the carbon concentration of the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is preferably 75.0 to 95.0% by mass from the viewpoint of thermal decomposability and solubility in a solvent, and 77.5 to 94.0% by mass. % Is more preferable, and 80.0 to 93.0% by mass is even more preferable.
- the oxygen concentration of the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is preferably 2.5 to 15.0% by mass, and preferably 3.0 to 13.0% by mass from the viewpoint of thermal decomposability and solubility in a solvent. % Is more preferable, and 3.5 to 11.0% by mass is even more preferable.
- the lower layer film-forming material of this embodiment contains at least the above-described modified monoalkylnaphthalene formaldehyde resin and / or modified deacetal-bonded monoalkylnaphthalene formaldehyde resin and an organic solvent.
- the content of the above-described modified monoalkylnaphthalene formaldehyde resin and modified deacetal-bonded monoalkylnaphthalene formaldehyde resin can be appropriately set and is not particularly limited, but the total amount including the organic solvent The total of these is preferably 1 to 33 parts by mass with respect to 100 parts by mass, more preferably 2 to 30 parts by mass, and still more preferably 3 to 25 parts by mass.
- organic solvent used in the lower layer film forming material a known one can be appropriately used as long as it can dissolve at least the above-described modified monoalkylnaphthalene formaldehyde resin and modified deacetalized monoalkylnaphthalene formaldehyde resin. .
- organic solvent examples include, for example, ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone, cellosolv solvents such as propylene glycol monomethyl ether and propylene glycol monomethyl ether acetate, ethyl lactate, methyl acetate, ethyl acetate, Ester solvents such as butyl acetate, isoamyl acetate, ethyl lactate, methyl methoxypropionate, methyl hydroxyisobutyrate, alcohol solvents such as methanol, ethanol, isopropanol, 1-ethoxy-2-propanol, toluene, xylene, anisole, etc.
- ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone
- cellosolv solvents such as propylene glyco
- aromatic hydrocarbon etc. are mentioned, it is not specifically limited to these.
- These organic solvents can be used individually by 1 type or in combination of 2 or more types as appropriate.
- cyclohexanone, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, ethyl lactate, methyl hydroxyisobutyrate, and anisole are particularly preferable.
- the content of the organic solvent in the lower layer film-forming material can be appropriately set and is not particularly limited.
- a modified monoalkylnaphthalene formaldehyde resin and a modified deacetal-bonded monoalkylnaphthalene formaldehyde The amount is preferably 100 to 10,000 parts by mass, more preferably 200 to 5,000 parts by mass with respect to a total of 100 parts by mass of the resin.
- the lower layer film-forming material of the present embodiment may contain other components such as a crosslinking agent, an acid generator, and a basic compound as necessary. Hereinafter, these optional components will be described.
- the underlayer film forming material of the present embodiment may contain a crosslinking agent as necessary from the viewpoint of suppressing intermixing.
- a crosslinking agent that can be used in the present embodiment include double bonds such as melamine compounds, guanamine compounds, glycoluril compounds or urea compounds, epoxy compounds, thioepoxy compounds, isocyanate compounds, azide compounds, and alkenyl ether groups.
- these crosslinking agents can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the content of the crosslinking agent in the lower layer film-forming material can be appropriately set and is not particularly limited, but is 5 for the total of 100 masses of the modified monoalkylnaphthalene formaldehyde resin and the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin.
- the amount is preferably 50 parts by mass, more preferably 10-40 parts by mass.
- the underlayer film forming material of the present embodiment may contain an acid generator as necessary from the viewpoint of further promoting the crosslinking reaction by heat.
- an acid generator those that generate acid by thermal decomposition and those that generate acid by light irradiation are known, and any of them can be used.
- the acid generator include onium salts, diazomethane derivatives, glyoxime derivatives, bissulfone derivatives, sulfonic acid esters of N-hydroxyimide compounds, ⁇ -ketosulfonic acid derivatives, disulfone derivatives, nitrobenzyl sulfonate derivatives, sulfonic acid ester derivatives, and the like. However, it is not particularly limited to these. In addition, these acid generators can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the content of the acid generator in the lower layer film-forming material can be appropriately set and is not particularly limited, but is 100 parts by mass in total of the modified monoalkylnaphthalene formaldehyde resin and the modified deacetalized monoalkylnaphthalene formaldehyde resin.
- the content is preferably 0.1 to 50 parts by mass, more preferably 0.5 to 40 parts by mass.
- the lower layer film-forming material of this embodiment may contain a basic compound from the viewpoint of improving storage stability.
- the basic compound serves as a quencher for the acid to prevent the acid generated in a trace amount from the acid generator from causing the crosslinking reaction to proceed.
- Examples of such basic compounds include primary, secondary, and tertiary aliphatic amines, hybrid amines, aromatic amines, heterocyclic amines, nitrogen-containing compounds having a carboxy group, and sulfonyl groups.
- Nitrogen-containing compounds having a hydroxyl group nitrogen-containing compounds having a hydroxyl group, nitrogen-containing compounds having a hydroxyphenyl group, alcoholic nitrogen-containing compounds, amide derivatives, imide derivatives, and the like, but are not particularly limited thereto.
- a basic compound can be used individually by 1 type or in combination of 2 or more types as appropriate.
- the content of the basic compound in the lower layer film-forming material can be appropriately set, and is not particularly limited.
- the total amount of the modified monoalkylnaphthalene formaldehyde resin and the modified deacetal-bonded monoalkylnaphthalene formaldehyde resin is 100 parts by mass. 0.001 to 2 parts by mass is preferable, and 0.01 to 1 part is more preferable. By making it into the above preferred range, the storage stability tends to be enhanced without excessively impairing the crosslinking reaction.
- the lower layer film forming material of the present embodiment may contain additives known in the art, for example, an ultraviolet absorber, a surfactant, a colorant, a nonionic surfactant, and the like.
- the lower layer film for lithography of this embodiment is formed from the above-mentioned lower layer film forming material.
- the multilayer resist pattern forming method of the present embodiment includes forming a lower layer film on the substrate using the lower layer film forming material and forming at least one photoresist layer on the lower layer film. Further, it is characterized in that a predetermined region of the photoresist layer is irradiated with radiation and alkali development is performed.
- the multilayer resist pattern forming method of the present embodiment forms a lower layer film on the substrate by using the lower layer film forming material described above, and a resist intermediate layer film material containing silicon atoms is formed on the lower layer film.
- An intermediate layer film is formed, and at least one photoresist layer is formed on the intermediate layer film. After that, a required region of the photoresist layer is irradiated with radiation, and alkali development is performed to form a resist pattern. Then, the intermediate layer film is etched using the resist pattern as a mask, the lower layer film is etched using the obtained intermediate layer film pattern as an etching mask, and the substrate is etched using the obtained lower layer film pattern as an etching mask. A pattern is formed on the substrate.
- the formation method of the lower layer film for lithography of the present embodiment is not particularly limited as long as it is formed from the above-described lower layer film forming material, and a method known in the art can be applied.
- the lower layer film is formed by applying the above-mentioned lower layer film forming material onto the substrate by a known coating method such as spin coating or screen printing or a printing method, and then removing the organic solvent by volatilizing it. be able to.
- a known coating method such as spin coating or screen printing or a printing method
- the baking temperature is not particularly limited, but is preferably in the range of 80 to 450 ° C., more preferably 200 to 400 ° C.
- the baking time is not particularly limited, but is preferably within the range of 10 to 300 seconds.
- the thickness of the lower layer film can be appropriately selected according to the required performance and is not particularly limited, but is usually preferably about 30 to 20,000 nm, more preferably 50 to 15,000 nm. It is preferable.
- a silicon-containing resist layer is formed thereon, or a single-layer resist made of ordinary hydrocarbons.
- a silicon-containing intermediate layer is formed thereon, and further thereon.
- a single-layer resist layer not containing silicon is produced. In this case, a well-known thing can be used as a photoresist material for forming this resist layer.
- a silicon-containing resist layer or a single layer resist made of normal hydrocarbon is formed on the lower layer film, and in the case of a three-layer process, the silicon layer is contained on the lower layer film.
- a single-layer resist layer not containing silicon can be produced on the intermediate layer and further on the silicon-containing intermediate layer.
- the photoresist material for forming the resist layer can be appropriately selected from known materials and is not particularly limited.
- a silicon-containing resist material for a two-layer process from the point of resistance to oxygen gas etching, a silicon atom-containing polymer such as a polysilsesquioxane derivative or a vinylsilane derivative is used as a base polymer, and an organic solvent, an acid generator, If necessary, a positive photoresist material containing a basic compound or the like is preferably used.
- a silicon atom-containing polymer a known polymer used in this type of resist material can be used.
- a polysilsesquioxane-based intermediate layer is preferably used as the silicon-containing intermediate layer for the three-layer process.
- the intermediate layer With an effect as an antireflection film, reflection can be suppressed.
- the k value increases and the substrate reflection tends to increase, but by suppressing the reflection in the intermediate layer, The substrate reflection can be reduced to 0.5% or less.
- polysilsesquioxane crosslinked with acid or heat into which a light absorbing group having a phenyl group or a silicon-silicon bond is introduced is preferably used for 193 nm exposure.
- an intermediate layer formed by a Chemical-Vapor-deposition (CVD) method can be used.
- a SiON film is known as an intermediate layer having a high effect as an antireflection film manufactured by a CVD method.
- the formation of the intermediate layer by a wet process such as spin coating or screen printing has a simpler and more cost-effective advantage than the CVD method.
- the upper layer resist in the three-layer process may be either a positive type or a negative type, and the same one as a commonly used single layer resist can be used.
- the lower layer film of this embodiment can also be used as an antireflection film for a normal single layer resist or a base material for suppressing pattern collapse. Since the lower layer film of this embodiment is excellent in etching resistance for the base processing, it can be expected to function as a hard mask for the base processing.
- a wet process such as spin coating or screen printing is preferably used as in the case of forming the lower layer film.
- prebaking is usually performed, but this prebaking is preferably performed at 80 to 180 ° C. for 10 to 300 seconds.
- a resist pattern can be obtained by performing exposure, post-exposure baking (PEB), and development.
- the thickness of the resist film is not particularly limited, but is generally preferably 30 to 500 nm, more preferably 50 to 400 nm.
- the exposure light may be appropriately selected and used according to the photoresist material to be used.
- high energy rays having a wavelength of 300 nm or less, specifically, 248 nm, 193 nm, 157 nm excimer laser, 3 to 20 nm soft X-ray, electron beam, X-ray and the like can be mentioned.
- the resist pattern formed by the above method is one in which pattern collapse is suppressed by the lower layer film of this embodiment. Therefore, by using the lower layer film of this embodiment, a finer pattern can be obtained, and the exposure amount necessary for obtaining the resist pattern can be reduced.
- gas etching is preferably used as the etching of the lower layer film in the two-layer process.
- gas etching etching using oxygen gas is suitable.
- an inert gas such as He or Ar, or CO, CO 2 , NH 3 , SO 2 , N 2 , NO 2 or H 2 gas can be added.
- the latter gas is used for side wall protection for preventing undercut of the pattern side wall.
- gas etching is also preferably used in the etching of the intermediate layer in the three-layer process.
- the gas etching the same one as described in the above two-layer process can be applied.
- the processing of the intermediate layer in the three-layer process is preferably performed using a fluorocarbon gas and a resist pattern as a mask.
- the lower layer film can be processed by, for example, oxygen gas etching using the intermediate layer pattern as a mask.
- a silicon oxide film, a silicon nitride film, or a silicon oxynitride film is formed by a CVD method, an ALD method, or the like.
- the method for forming the nitride film is described in, for example, Japanese Patent Application Laid-Open No. 2002-334869 (Patent Document 6) and WO 2004/066377 (Patent Document 7).
- a photoresist film can be formed directly on such an intermediate film, but an organic antireflection film (BARC) is formed on the intermediate film by spin coating, and a photoresist film is formed thereon. May be.
- an intermediate layer based on polysilsesquioxane is also preferably used.
- the resist intermediate layer film As an antireflection film, reflection can be suppressed.
- the material of the polysilsesquioxane-based intermediate layer is specifically described in, for example, JP-A-2007-226170 (Patent Document 8) and JP-A-2007-226204 (Patent Document 9).
- Etching of the next substrate can also be performed by a conventional method.
- the substrate is SiO 2 or SiN
- etching mainly using a chlorofluorocarbon gas and if p-Si, Al, or W is chlorine or bromine gas, Etching mainly composed of can be performed.
- the substrate processing is etched with chlorofluorocarbon gas, the silicon-containing resist in the two-layer resist process and the silicon-containing intermediate layer in the three-layer process are peeled off simultaneously with the substrate processing.
- the silicon-containing resist layer or the silicon-containing intermediate layer is peeled off separately, and generally dry etching peeling with a chlorofluorocarbon-based gas is performed after the substrate processing. .
- the lower layer film of this embodiment is characterized by excellent etching resistance of these substrates.
- a substrate known in the art can be appropriately selected and used, and is not particularly limited, but Si, ⁇ -Si, p-Si, SiO 2 , SiN, SiON, W, TiN, Al, etc. Is mentioned.
- the substrate may be a laminate having a film to be processed (substrate to be processed) on a base material (support). Examples of such processed films include various low-k films such as Si, SiO 2 , SiON, SiN, p-Si, ⁇ -Si, W, W-Si, Al, Cu, and Al-Si, and stopper films thereof. In general, a material different from the base material (support) is used.
- the thickness of the substrate to be processed or the film to be processed is not particularly limited, but it is usually preferably about 50 to 10,000 nm, more preferably 75 to 5,000 nm.
- the carbon concentration was 85.1% by mass, and the oxygen concentration was 8.3% by mass (the number of moles of oxygen contained per 1 g of resin was 0.0052 mol / g).
- the softening point was 82 ° C. and the hydroxyl value was 27 mgKOH / g.
- the carbon concentration was 84.5% by mass
- the oxygen concentration was 8.5% by mass (the number of moles of oxygen contained per 1 g of resin was 0.053 mol / g).
- the softening point was 79 ° C. and the hydroxyl value was 22 mgKOH / g.
- the carbon concentration was 83.9% by mass, and the oxygen concentration was 8.6% by mass (the number of moles of oxygen contained per 1 g of resin was 0.0054 mol / g).
- the softening point was 81 ° C. and the hydroxyl value was 19 mgKOH / g.
- Example 1 In a 0.5 L four-necked flask equipped with a Liebig condenser, a thermometer and a stirring blade, 24.0 g of monomethylnaphthalene formaldehyde resin obtained in Synthesis Example 1 (containing 0.125 mol of oxygen) in a nitrogen stream ), 1-naphthol 36.1 g (0.25 mol, manufactured by Tokyo Chemical Industry Co., Ltd.), heated and melted at 120 ° C., and then stirred with paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) 1.8 mg was added to initiate the reaction. The temperature was immediately raised to 190 ° C.
- Example 2 Into a 0.5 L four-necked flask equipped with a Dean-Stark tube equipped with a Dimroth condenser, thermometer and stirring blade, 50.0 g of monomethylnaphthalene formaldehyde resin obtained in Synthesis Example 1 and ethylbenzene (Kanto Chemical Co., Ltd.) )) 50 g and methyl isobutyl ketone (manufactured by Kanto Chemical Co., Inc.) 50 g were charged and dissolved at 120 ° C., and then paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) 2.5 mg under a steam flow with stirring. Was added to start the reaction.
- the carbon concentration was 86.7% by mass
- the oxygen concentration was 6.1% by mass (the number of moles of oxygen contained per 1 g of resin was 0.0038 mol / g).
- the softening point was 104 ° C. and the hydroxyl value was 30 mgKOH / g.
- Example 3 In a four-necked flask with an internal volume of 0.3 L equipped with a Liebig condenser, thermometer, and stirring blade, 39.5 g of deacetal-bonded monomethylnaphthalene formaldehyde resin obtained in Example 2 (number of moles of oxygen contained) was obtained under a nitrogen stream. 0.15 mol), 43.3 g of 1-naphthol (0.30 mol, manufactured by Tokyo Chemical Industry Co., Ltd.), heated and melted at 120 ° C., and then stirred with paratoluenesulfonic acid (Wako Pure Chemical Industries, Ltd.) )) 2.5 mg was added to start the reaction. The temperature was immediately raised to 190 ° C.
- Example 4 In a three-necked flask having an internal volume of 0.05 L equipped with a Liebig condenser, a thermometer, and a stirring blade, 2.4 g of monoethylnaphthalene formaldehyde resin obtained in Synthesis Example 2 (with a molar number of oxygen of 0. 0125 mol), 3.6 g of 1-naphthol (0.025 mol, manufactured by Tokyo Chemical Industry Co., Ltd.), heated and melted at 120 ° C., and then stirred with paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) ) 0.2 mg was added to initiate the reaction. The temperature was immediately raised to 190 ° C.
- Example 5 Into a 0.05 L three-necked flask equipped with a Dean-Stark tube equipped with a Dimroth condenser, a thermometer and a stirring blade, 5.0 g of monoethylnaphthalene formaldehyde resin obtained in Synthesis Example 2 and ethylbenzene (Kanto Chemical ( 5 g) and 5 g of methyl isobutyl ketone (manufactured by Kanto Chemical Co., Inc.) were charged and dissolved at 120 ° C., and then paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) under a steam flow with stirring. 3 mg was added to start the reaction.
- Kanto Chemical ( 5 g) and 5 g of methyl isobutyl ketone manufactured by Kanto Chemical Co., Inc.
- the carbon concentration was 86.3% by mass
- the oxygen concentration was 6.3% by mass (the number of moles of oxygen contained per 1 g of resin was 0.0039 mol / g).
- the softening point was 98 ° C. and the hydroxyl value was 32 mgKOH / g.
- Example 6 In a 0.05 L three-necked flask equipped with a Liebig condenser, a thermometer, and a stirring blade, 3.8 g of deacetal-bonded monoethylnaphthalene formaldehyde resin obtained in Example 5 (containing oxygen mole) under a nitrogen stream. 0.015 mol) and 4.3 g of 1-naphthol (0.030 mol, manufactured by Tokyo Chemical Industry Co., Ltd.), heated and melted at 120 ° C., and then stirred with paratoluenesulfonic acid (Wako Pure Chemical Industries, Ltd.) 0.3 mg) was added to start the reaction. The temperature was immediately raised to 190 ° C.
- the carbon concentration was 86.2% by mass, and the oxygen concentration was 6.3% by mass (the number of moles of oxygen contained per 1 g of resin was 0.0039 mol / g).
- the softening point was 99 ° C. and the hydroxyl value was 31 mgKOH / g.
- modified monomethylnaphthalene formaldehyde resin and modified deacetal-bonded monomethylnaphthalene formaldehyde resin are superior in thermal decomposability compared to modified dimethylnaphthalene formaldehyde resin and have the same solubility in propylene glycol monomethyl ether acetate (PGMEA). It turns out that it is excellent in.
- modified monoalkylnaphthalene formaldehyde resin and modified deacetal-bonded monomethylnaphthalene formaldehyde resin of the present invention are excellent in thermal decomposability and solubility in solvents, they are widely and effectively used in various applications that require these performances. Is available.
- thermosetting resin used as a film-forming resin or a resist resin in semiconductor production.
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Description
[1] 下記式(1)で表される化合物及びホルムアルデヒドを触媒の存在下で反応させて得られるモノアルキルナフタレンホルムアルデヒド樹脂を、酸性処理することにより得られる樹脂。
[2] 前記酸性処理が、酸性触媒及び下記式(2)で表される化合物を使用するものである、上記[1]に記載の樹脂。
[3] 前記式(2)で表される化合物が、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン及びジヒドロキシアントラセンからなる群より選ばれる少なくとも一種である、上記[2]に記載の変性モノアルキルナフタレンホルムアルデヒド樹脂。
[4] 前記式(2)で表される化合物の使用量が、前記モノアルキルナフタレンホルムアルデヒド樹脂中の含有酸素モル数1モルに対して、0.1~5モルである、上記[2]又は[3]に記載の樹脂。
[5] 前記酸性処理が、酸性触媒及び水を使用するものである、上記[1]に記載の樹脂。
[6] 前記酸性触媒の使用量が、前記モノアルキルナフタレンホルムアルデヒド樹脂100質量部に対して、0.0001~100質量部である、上記[5]に記載の樹脂。
[7] 上記[5]又は[6]に記載の樹脂を、酸性触媒及び上記式(2)で表される化合物を使用して酸性処理することにより得られる、樹脂。
[8] 前記式(2)で表される化合物が、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン及びジヒドロキシアントラセンからなる群より選ばれる少なくとも一種である、上記[7]に記載の樹脂。
[9] 前記式(2)で表される化合物の使用量が、前記モノアルキルナフタレンホルムアルデヒド樹脂中の含有酸素モル数1モルに対して、0.1~5モルである、[7]又は[8]に記載の樹脂。
[10] 上記式(1)で表される化合物及びホルムアルデヒドを触媒の存在下で反応させて得られるモノアルキルナフタレンホルムアルデヒド樹脂を、酸性処理することにより得られる、下層膜用樹脂。
[11] 前記酸性処理が、酸性触媒及び上記式(2)で表される化合物を使用して行なわれる、及び/又は、酸性触媒及び水を使用して行なわれる、上記[10]に記載の下層膜用樹脂。
下層膜形成材料。
[13] さらに、酸発生剤を含有することを特徴とする、上記[12]に記載の下層膜形成材料。
[14] さらに、架橋剤を含有することを特徴とする、上記[12]又は[13]に記載の下層膜形成材料。
[15] 上記[12]~[14]のいずれか一項に記載の下層膜形成材料から形成されることを特徴とする、リソグラフィー用下層膜。
[16] 基板上に、上記[12]~[14]のいずれか一項に記載の下層膜形成材料を用いて下層膜を形成し、該下層膜上に、少なくとも1層のフォトレジスト層を形成した後、該フォトレジスト層の所要の領域に放射線を照射し、アルカリ現像を行うことを特徴とする、パターン形成方法。
[17] 基板上に、上記[12]~[14]のいずれか一項に記載の下層膜形成材料を用いて下層膜を形成し、該下層膜上に、珪素原子を含有するレジスト中間層膜材料を用いて中間層膜を形成し、該中間層膜上に、少なくとも1層のフォトレジスト層を形成した後、該フォトレジスト層の所要の領域に放射線を照射し、アルカリ現像してレジストパターンを形成し、その後、該レジストパターンをマスクとして前記中間層膜をエッチングし、得られた中間層膜パターンをエッチングマスクとして前記下層膜をエッチングし、得られた下層膜パターンをエッチングマスクとして基板をエッチングすることで基板にパターンを形成することを特徴とする、パターン形成方法。
本実施形態の樹脂は、下記式(1)で表される化合物及びホルムアルデヒドを触媒の存在下で反応させて得られるモノアルキルナフタレンホルムアルデヒド樹脂を、酸性処理することにより得られるものである。
ここで用いられるモノアルキルナフタレンホルムアルデヒド樹脂は、上記式(1)で表されるモノアルキルナフタレン化合物とホルムアルデヒドを触媒の存在下で縮合反応させて得られるものであれば、特に制限されるものではない。
本実施形態の樹脂は、上述したモノアルキルナフタレンホルムアルデヒド樹脂を、酸性処理することにより、又は酸性処理したものを更に異なる酸性処理することにより得られるものである。
ここで酸性処理としては、以下のものがある。
(A)酸性触媒及び下記式(2)で表される化合物を使用するもの。
(B)酸性触媒及び水を使用するもの。
また、モノアルキルナフタレンホルムアルデヒド樹脂は、ナフタレン環が-(CH2)l-及び/又はCH2A-で架橋されている。ここで、lは1~10の数を、Aは-(OCH2)m-を、mは0~10の数をそれぞれ表す。そして、(B)の操作により、ナフタレン環を介さないオキシメチレン等同士の結合が減り、l及び/又はmが少なくなる、すなわち、ナフタレン環を介する位置にあるアセタール結合が減少する。これにより、酸素濃度が低くなり、軟化点が上昇する。とりわけ、このように、(B)の操作の後に(A)の操作をして得られる樹脂は、(A)の操作のみで得られる樹脂と比較して、熱分解性がさらに向上する。本明細書では、この(B)の反応を、「脱アセタール結合反応」と称する。
以下、上記(A)及び(B)の操作によって得られる具体的態様について、詳細に説明する。
この変性モノアルキルナフタレンホルムアルデヒド樹脂は、モノアルキルナフタレンホルムアルデヒド樹脂に前記(A)の酸性処理を行うことによって得られる。すなわち、前記アルキルナフタレンホルムアルデヒド樹脂と上記式(2)で表される化合物を、酸性触媒の存在下で加熱し、モノアルキルナフタレンホルムアルデヒド樹脂を変性させることにより得られる。
これらのうち、少なくとも2個のベンゼン環の非共有電子対が関与する共役構造を含むフェノール誘導体の方が熱分解性に優れる傾向にあるため、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン、ジヒドロキシアントラセンが好ましい。また、これらのうち、ヒドロキシ基を有する方が酸架橋剤との架橋性に優れる傾向にあるため、フェニルフェノール、ナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、ジヒドロキシアントラセンがより好ましい。
計算式:含有酸素モル数(mol)=使用樹脂量(g)×酸素濃度(質量%)/16
この脱アセタール結合アルキルナフタレンホルムアルデヒド樹脂は、モノアルキルナフタレンホルムアルデヒド樹脂に前記(B)の酸性処理を行うことによって得られる。すなわち、前記アルキルナフタレンホルムアルデヒド樹脂を水及び酸性触媒の存在下で処理し、アセタール結合を減じることにより得られる。
この変性脱アセタール結合モノアルキルナフタレンホルムアルデヒド樹脂は、モノアルキルナフタレンホルムアルデヒド樹脂に前記(B)の酸性処理を行い、次いで(A)の酸性処理を行うことによって得られる。すなわち、前述した脱アセタール結合モノアルキルナフタレンホルムアルデヒド樹脂と下記式(2)で表される化合物を、酸性触媒の存在下で加熱し、脱アセタール結合モノアルキルナフタレンホルムアルデヒド樹脂を変性させることにより得られる。
これらのうち、少なくとも2個のベンゼン環の非共有電子対が関与する共役構造を含むフェノール誘導体の方が熱分解性に優れる傾向にあるため、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン、ジヒドロキシアントラセンが好ましい。また、これらのうち、ヒドロキシ基を有する方が酸架橋剤との架橋性に優れる傾向にあるため、フェニルフェノール、ナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、ジヒドロキシアントラセンがより好ましい。
本実施形態の下層膜形成材料は、上述した変性モノアルキルナフタレンホルムアルデヒド樹脂及び/又は変性脱アセタール結合モノアルキルナフタレンホルムアルデヒド樹脂と、有機溶媒とを少なくとも含有するものである。
本実施形態の下層膜形成材料は、必要に応じて、架橋剤、酸発生剤、塩基性化合物等の他の成分を含んでいてもよい。以下、これらの任意成分について説明する。
本実施形態のリソグラフィー用下層膜は、前述の下層膜形成材料から形成されるものである。また、本実施形態の多層レジストパターンの形成方法は、基板上に、前述の下層膜形成材料を用いて下層膜を形成し、該下層膜上に、少なくとも1層のフォトレジスト層を形成した後、該フォトレジスト層の所要の領域に放射線を照射し、アルカリ現像を行うことを特徴とする。さらに、本実施形態の多層レジストパターンの形成方法は、基板上に、前述の下層膜形成材料を用いて下層膜を形成し、該下層膜上に、珪素原子を含有するレジスト中間層膜材料を用いて中間層膜を形成し、該中間層膜上に、少なくとも1層のフォトレジスト層を形成した後、該フォトレジスト層の所要の領域に放射線を照射し、アルカリ現像してレジストパターンを形成後、該レジストパターンをマスクとして前記中間層膜をエッチングし、得られた中間層膜パターンをエッチングマスクとして前記下層膜をエッチングし、得られた下層膜パターンをエッチングマスクとして基板をエッチングすることで基板にパターンを形成することを特徴とする。
<分子量>
ゲル浸透クロマトグラフィー(GPC)分析により、ポリスチレン換算の重量平均分子量(Mw)、数平均分子量(Mn)を求め、分散度(Mw/Mn)を求めた。
装置:Shodex GPC-101型(昭和電工(株)製)
カラム:LF-804×3
溶離液:THF 1ml/min
温度:40℃
<樹脂中の炭素濃度・酸素濃度>
有機元素分析により樹脂中の炭素濃度及び酸素濃度(質量%)を測定した。また、樹脂1g当たりの含有酸素モル数を下記計算式に従って算出した。
装置:CHNコーダーMT-6(ヤナコ分析工業(株)製)
計算式:樹脂1g当たりの含有酸素モル数(mol/g)=酸素濃度(質量%)/16
<軟化点>
JIS-K5601に従って樹脂の軟化点を測定した。
<熱分解性>
400℃到達時点における熱重量減少率(熱分解量(%))を測定した。
装置:TG/DTA6200(エス・アイ・アイ・ナノテクノロジー社製)
測定温度:30~550℃(昇温速度10℃/分)
測定雰囲気:Air流通下
<水酸基価>
JIS-K1557に従って樹脂の水酸基価を測定した。
<膜厚減少率>
2cm角のSiウェハ上に、測定対象の樹脂を20wt%含有するシクロヘキサノン樹脂溶液を、スピンコーターを用いて4000rpmで60秒回転させて均一塗布した。次に、エリプソメーターを用いて、Siウェハ上の膜の厚みT0を測定した。次に、ベーク装置を用いて、Siウェハを400℃で120秒間ベークし、ベーク後の膜の厚みT1を測定した。そして、ベーク前後の膜厚から、下記式に基づいて減少率を算出した。
膜厚減少率(%)=100×(T0-T1)/T0)
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積1Lの四つ口フラスコに、窒素気流中、1-メチルナフタレン71.1g(0.5mol、関東化学(株)製)、40質量%ホルマリン水溶液150g(ホルムアルデヒドとして2mol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)72.7gを仕込み、常圧下、100℃で撹拌、還流しながら6時間反応させた。希釈溶媒としてエチルベンゼン(関東化学(株)製)150gを加え、静置後、下相の水相を除去した。さらに、中和及び水洗を行い、エチルベンゼン及び未反応の1-メチルナフタレンを減圧下に留去することにより、淡黄色固体のモノメチルナフタレンホルムアルデヒド樹脂80.3gを得た。
GPC測定の結果、Mn:486、Mw:948、Mw/Mn:1.95であった。有機元素分析の結果、炭素濃度は85.1質量%、酸素濃度は8.3質量%(樹脂1g当たりの含有酸素モル数は0.0052mol/g)であった。軟化点は82℃で、水酸基価は27mgKOH/gであった。
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積0.1Lの三つ口フラスコに、窒素気流中、1-エチルナフタレン7.8g(0.05mol、関東化学(株)製)、40質量%ホルマリン水溶液15g(ホルムアルデヒドとして0.2mol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)72.7gを仕込み、常圧下、100℃で撹拌、還流しながら6時間反応させた。希釈溶媒としてエチルベンゼン(関東化学(株)製)15gを加え、静置後、下相の水相を除去した。さらに、中和及び水洗を行い、エチルベンゼン及び未反応の1-エチルナフタレンを減圧下に留去することにより、淡黄色固体のモノエチルナフタレンホルムアルデヒド樹脂8.9gを得た。
GPC測定の結果、Mn:504、Mw:977、Mw/Mn:1.94であった。有機元素分析の結果、炭素濃度は84.5質量%、酸素濃度は8.5質量%(樹脂1g当たりの含有酸素モル数は0.053mol/g)であった。軟化点は79℃で、水酸基価は22mgKOH/gであった。
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積1Lの四つ口フラスコに、窒素気流中、1,5-ジメチルナフタレン78.1g(0.5mol、三菱ガス化学(株)製)、40質量%ホルマリン水溶液150g(ホルムアルデヒドとして2mol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)66.2gを仕込み、常圧下、100℃で撹拌・還流しながら6時間反応させた。希釈溶媒としてエチルベンゼン(関東化学(株)製)150gを加え、静置後、下相の水相を除去した。さらに、中和及び水洗を行い、エチルベンゼン及び未反応の1,5-ジメチルナフタレンを減圧下に留去することにより、淡黄色固体のジメチルナフタレンホルムアルデヒド樹脂92.4gを得た。
GPC測定の結果、Mn:526、Mw:992、Mw/Mn:1.89であった。有機元素分析の結果、炭素濃度は83.9質量%、酸素濃度は8.6質量%(樹脂1g当たりの含有酸素モル数は0.0054mol/g)であった。軟化点は81℃で、水酸基価は19mgKOH/gであった。
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、窒素気流下で、合成例1で得たモノメチルナフタレンホルムアルデヒド樹脂24.0g(含有酸素モル数0.125mol)、1-ナフトール36.1g(0.25mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)1.8mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌保持した後、パラトルエンスルホン酸(和光純薬工業(株)製)1.2mgを加え、さらに220℃まで昇温させて2時間反応させた(計5時間)。混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(重量比))150gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、黒褐色固体の変性モノメチルナフタレンホルムアルデヒド樹脂40.0gを得た。
GPC分析の結果、Mn:463、Mw:682、Mw/Mn:1.47であった。有機元素分析の結果、炭素濃度は89.4質量%、酸素濃度は5.0質量%であった。400℃到達時点における熱重量減少率(%)は、17%であった。軟化点は134℃で、水酸基価は、197mgKOH/gであった。また、得られた樹脂は、樹脂/プロピレングリコールモノメチルエーテルアセテート(PGMEA)=1/9(重量比)で可溶であった。
ジムロート冷却管を設置したディーンスターク管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、合成例1で得たモノメチルナフタレンホルムアルデヒド樹脂50.0g、エチルベンゼン(関東化学(株)製)50g及びメチルイソブチルケトン(関東化学(株)製)50gを仕込んで120℃で溶解後、撹拌しながら水蒸気流通下でパラトルエンスルホン酸(和光純薬工業(株)製)2.5mgを加えて反応を開始した。2時間後、さらにパラトルエンスルホン酸(和光純薬工業(株)製)1.3mgを加えてさらに3時間(計5時間)反応させた。エチルベンゼン(関東化学(株)製)150gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、淡赤色固体の脱アセタール結合モノメチルナフタレンホルムアルデヒド樹脂41.2gを得た。
GPC測定の結果、Mn:326、Mw:851、Mw/Mn:2.61であった。有機元素分析の結果、炭素濃度は86.7質量%、酸素濃度は6.1質量%(樹脂1g当たりの含有酸素モル数は0.0038mol/g)であった。軟化点は104℃で、水酸基価は30mgKOH/gであった。
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.3Lの四つ口フラスコに、窒素気流下で、実施例2で得た脱アセタール結合モノメチルナフタレンホルムアルデヒド樹脂39.5g(含有酸素モル数0.15mol)、1-ナフトール43.3g(0.30mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)2.5mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌保持した後、パラトルエンスルホン酸(和光純薬工業(株)製)1.7mgを加え、さらに220℃まで昇温させて2時間反応させた(計5時間)。混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(重量比))180gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、黒褐色固体の変性脱アセタール結合モノメチルナフタレンホルムアルデヒド樹脂48.9gを得た。
GPC分析の結果、Mn:504、Mw:761、Mw/Mn:1.51であった。有機元素分析の結果、炭素濃度は89.6質量%、酸素濃度は4.9質量%であった。400℃到達時点における熱重量減少率(%)は、10%であった。軟化点は138℃で、水酸基価は、193mgKOH/gであった。また、得られた樹脂は、樹脂/プロピレングリコールモノメチルエーテルアセテート(PGMEA)=1/9(重量比)で可溶であった。
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.05Lの三つ口フラスコに、窒素気流下で、合成例2で得たモノエチルナフタレンホルムアルデヒド樹脂2.4g(含有酸素モル数0.0125mol)、1-ナフトール3.6g(0.025mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)0.2mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌保持した後、パラトルエンスルホン酸(和光純薬工業(株)製)0.1mgを加え、さらに220℃まで昇温させて2時間反応させた(計5時間)。混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(重量比))15gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、黒褐色固体の変性モノエチルナフタレンホルムアルデヒド樹脂3.8gを得た。
GPC分析の結果、Mn:489、Mw:703、Mw/Mn:1.44であった。有機元素分析の結果、炭素濃度は89.3質量%、酸素濃度は5.0質量%であった。400℃到達時点における熱重量減少率(%)は、23%であった。軟化点は129℃で、水酸基価は、195mgKOH/gであった。また、得られた樹脂は、樹脂/プロピレングリコールモノメチルエーテルアセテート(PGMEA)=1/9(重量比)で可溶であった。
ジムロート冷却管を設置したディーンスターク管、温度計及び攪拌翼を備えた内容積0.05Lの三つ口フラスコに、合成例2で得たモノエチルナフタレンホルムアルデヒド樹脂5.0g、エチルベンゼン(関東化学(株)製)5g及びメチルイソブチルケトン(関東化学(株)製)5gを仕込んで120℃で溶解後、撹拌しながら水蒸気流通下でパラトルエンスルホン酸(和光純薬工業(株)製)0.3mgを加えて反応を開始した。2時間後、さらにパラトルエンスルホン酸(和光純薬工業(株)製)0.1mgを加えてさらに3時間(計5時間)反応させた。エチルベンゼン(関東化学(株)製)15gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、淡赤色固体の脱アセタール結合モノエチルナフタレンホルムアルデヒド樹脂4.0gを得た。
GPC測定の結果、Mn:359、Mw:908、Mw/Mn:2.53であった。有機元素分析の結果、炭素濃度は86.3質量%、酸素濃度は6.3質量%(樹脂1g当たりの含有酸素モル数は0.0039mol/g)であった。軟化点は98℃で、水酸基価は32mgKOH/gであった。
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.05Lの三つ口フラスコに、窒素気流下で、実施例5で得た脱アセタール結合モノエチルナフタレンホルムアルデヒド樹脂3.8g(含有酸素モル数0.015mol)、1-ナフトール4.3g(0.030mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)0.3mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌保持した後、パラトルエンスルホン酸(和光純薬工業(株)製)0.2mgを加え、さらに220℃まで昇温させて2時間反応させた(計5時間)。混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(重量比))18gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、黒褐色固体の変性脱アセタール結合モノエチルナフタレンホルムアルデヒド樹脂6.6gを得た。
GPC分析の結果、Mn:539、Mw:832、Mw/Mn:1.54であった。有機元素分析の結果、炭素濃度は89.7質量%、酸素濃度は4.9質量%であった。400℃到達時点における熱重量減少率(%)は、16%であった。軟化点は132℃で、水酸基価は、192mgKOH/gであった。また、得られた樹脂は、樹脂/プロピレングリコールモノメチルエーテルアセテート(PGMEA)=1/9(重量比)で可溶であった。
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、窒素気流下で、比較合成例1で得たジメチルナフタレンホルムアルデヒド樹脂23.1g(含有酸素モル数0.125mol)、1-ナフトール36.6g(0.25mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)1.8mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌保持した後、パラトルエンスルホン酸(和光純薬工業(株)製)1.2mgを加え、さらに220℃まで昇温させて2時間反応させた(計5時間)。混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(重量比))150gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、黒褐色固体の変性ジメチルナフタレンホルムアルデヒド樹脂39.7gを得た。
GPC分析の結果、Mn:462、Mw:693、Mw/Mn:1.50であった。有機元素分析の結果、炭素濃度は89.3質量%、酸素濃度は4.7質量%であった。400℃到達時点における熱重量減少率(%)は、32%であった。軟化点は136℃で、水酸基価は、195mgKOH/gであった。また、得られた樹脂は、樹脂/プロピレングリコールモノメチルエーテルアセテート(PGMEA)=1/9(重量比)で可溶であった。
ジムロート冷却管を設置したディーンスターク管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、合成例1で得たジメチルナフタレンホルムアルデヒド樹脂50.0g、エチルベンゼン(関東化学(株)製)50g及びメチルイソブチルケトン(関東化学(株)製)50gを仕込んで120℃で溶解後、撹拌しながら水蒸気流通下でパラトルエンスルホン酸(和光純薬工業(株)製)2.5mgを加えて反応を開始した。2時間後、さらにパラトルエンスルホン酸(和光純薬工業(株)製)1.3mgを加えてさらに3時間(計5時間)反応させた。エチルベンゼン(関東化学(株)製)150gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、淡赤色固体の脱アセタール結合ジメチルナフタレンホルムアルデヒド樹脂40.0gを得た。
GPC測定の結果、Mn:360、Mw:911、Mw/Mn:2.52であった。有機元素分析の結果、炭素濃度は86.2質量%、酸素濃度は6.3質量%(樹脂1g当たりの含有酸素モル数は0.0039mol/g)であった。軟化点は99℃で、水酸基価は31mgKOH/gであった。
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.3Lの四つ口フラスコに、窒素気流下で、比較例2で得た脱アセタール結合ジメチルナフタレンホルムアルデヒド樹脂38.5g(含有酸素モル数0.15mol)、1-ナフトール43.3g(0.30mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)2.5mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌保持した後、パラトルエンスルホン酸(和光純薬工業(株)製)1.6mgを加え、さらに220℃まで昇温させて2時間反応させた(計5時間)。混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(重量比))180gで希釈後、中和及び水洗を行い、溶剤を減圧下に除去することにより、黒褐色固体の変性脱アセタール結合ジメチルナフタレンホルムアルデヒド樹脂49.1gを得た。
GPC分析の結果、Mn:512、Mw:780、Mw/Mn:1.52であった。有機元素分析の結果、炭素濃度は89.6質量%、酸素濃度は4.6質量%であった。400℃到達時点における熱重量減少率(%)は、26%であった。軟化点は140℃で、水酸基価は、191mgKOH/gであった。また、得られた樹脂は、樹脂/プロピレングリコールモノメチルエーテルアセテート(PGMEA)=1/9(重量比)で可溶であった。
Claims (17)
- 前記式(2)で表される化合物が、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン及びジヒドロキシアントラセンからなる群より選ばれる少なくとも一種である、
請求項2に記載の樹脂。 - 前記式(2)で表される化合物の使用量が、前記モノアルキルナフタレンホルムアルデヒド樹脂中の含有酸素モル数1モルに対して、0.1~5モルである、
請求項2又は3に記載の樹脂。 - 前記酸性処理が、酸性触媒及び水を使用するものである、
請求項1に記載の樹脂。 - 前記酸性触媒の使用量が、前記モノアルキルナフタレンホルムアルデヒド樹脂100質量部に対して、0.0001~100質量部である、
請求項5に記載の樹脂。 - 請求項5又は6に記載の樹脂を、酸性触媒及び上記式(2)で表される化合物を使用して酸性処理することにより得られる、
樹脂。 - 前記式(2)で表される化合物が、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン及びジヒドロキシアントラセンからなる群より選ばれる少なくとも一種である、
請求項7に記載の樹脂。 - 前記式(2)で表される化合物の使用量が、前記モノアルキルナフタレンホルムアルデヒド樹脂中の含有酸素モル数1モルに対して、0.1~5モルである、
請求項7又は8に記載の樹脂。 - 請求項1に記載の樹脂と、有機溶媒とを少なくとも含有することを特徴とする、
下層膜形成材料。 - さらに、酸発生剤を含有することを特徴とする、
請求項12に記載の下層膜形成材料。 - さらに、架橋剤を含有することを特徴とする、
請求項12又は13に記載の下層膜形成材料。 - 請求項12~14のいずれか一項に記載の下層膜形成材料から形成されることを特徴とする、
リソグラフィー用下層膜。 - 基板上に、請求項12~14のいずれか一項に記載の下層膜形成材料を用いて下層膜を形成し、該下層膜上に、少なくとも1層のフォトレジスト層を形成した後、該フォトレジスト層の所要の領域に放射線を照射し、アルカリ現像を行うことを特徴とする、
パターン形成方法。 - 基板上に、請求項12~14のいずれか一項に記載の下層膜形成材料を用いて下層膜を形成し、該下層膜上に、珪素原子を含有するレジスト中間層膜材料を用いて中間層膜を形成し、該中間層膜上に、少なくとも1層のフォトレジスト層を形成した後、該フォトレジスト層の所要の領域に放射線を照射し、アルカリ現像してレジストパターンを形成し、その後、該レジストパターンをマスクとして前記中間層膜をエッチングし、得られた中間層膜パターンをエッチングマスクとして前記下層膜をエッチングし、得られた下層膜パターンをエッチングマスクとして基板をエッチングすることで基板にパターンを形成することを特徴とする、
パターン形成方法。
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| WO2014203866A1 (ja) * | 2013-06-18 | 2014-12-24 | 三菱瓦斯化学株式会社 | 樹脂組成物、プリプレグ、樹脂シート及び金属箔張り積層板 |
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- 2013-02-25 WO PCT/JP2013/054763 patent/WO2013129313A1/ja not_active Ceased
- 2013-02-25 CN CN201380009715.7A patent/CN104114596A/zh active Pending
- 2013-02-25 KR KR1020147023754A patent/KR20140136931A/ko not_active Withdrawn
- 2013-02-25 JP JP2014502207A patent/JP6237616B2/ja active Active
- 2013-02-25 US US14/381,043 patent/US20150037736A1/en not_active Abandoned
- 2013-02-27 TW TW102106960A patent/TW201402631A/zh unknown
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014203865A1 (ja) * | 2013-06-18 | 2014-12-24 | 三菱瓦斯化学株式会社 | シアン酸エステル化合物、該化合物を含む硬化性樹脂組成物及びその硬化物 |
| WO2014203866A1 (ja) * | 2013-06-18 | 2014-12-24 | 三菱瓦斯化学株式会社 | 樹脂組成物、プリプレグ、樹脂シート及び金属箔張り積層板 |
| JPWO2014203865A1 (ja) * | 2013-06-18 | 2017-02-23 | 三菱瓦斯化学株式会社 | シアン酸エステル化合物、該化合物を含む硬化性樹脂組成物及びその硬化物 |
| JPWO2014203866A1 (ja) * | 2013-06-18 | 2017-02-23 | 三菱瓦斯化学株式会社 | 樹脂組成物、プリプレグ、樹脂シート及び金属箔張り積層板 |
| US10160824B2 (en) | 2013-06-18 | 2018-12-25 | Mitsubishi Gas Chemical Company, Inc. | Cyanate ester compound, curable resin composition containing said compound, and cured product of said composition |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2821421A1 (en) | 2015-01-07 |
| JPWO2013129313A1 (ja) | 2015-07-30 |
| EP2821421A4 (en) | 2015-09-30 |
| US20150037736A1 (en) | 2015-02-05 |
| JP6237616B2 (ja) | 2017-11-29 |
| CN104114596A (zh) | 2014-10-22 |
| TW201402631A (zh) | 2014-01-16 |
| KR20140136931A (ko) | 2014-12-01 |
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