WO2019004142A1 - 膜形成材料、リソグラフィー用膜形成用組成物、光学部品形成用材料、レジスト組成物、レジストパターン形成方法、レジスト用永久膜、感放射線性組成物、アモルファス膜の製造方法、リソグラフィー用下層膜形成材料、リソグラフィー用下層膜形成用組成物、リソグラフィー用下層膜の製造方法及び回路パターン形成方法 - Google Patents
膜形成材料、リソグラフィー用膜形成用組成物、光学部品形成用材料、レジスト組成物、レジストパターン形成方法、レジスト用永久膜、感放射線性組成物、アモルファス膜の製造方法、リソグラフィー用下層膜形成材料、リソグラフィー用下層膜形成用組成物、リソグラフィー用下層膜の製造方法及び回路パターン形成方法 Download PDFInfo
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- WO2019004142A1 WO2019004142A1 PCT/JP2018/024048 JP2018024048W WO2019004142A1 WO 2019004142 A1 WO2019004142 A1 WO 2019004142A1 JP 2018024048 W JP2018024048 W JP 2018024048W WO 2019004142 A1 WO2019004142 A1 WO 2019004142A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/14—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom
- C07D251/24—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom to three ring carbon atoms
-
- 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
-
- 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
-
- 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
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- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
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Definitions
- the present invention relates to a film forming material, a composition for forming a film for lithography, a material for forming an optical component, a resist composition, a method for forming a resist pattern, a permanent film for a resist, a radiation sensitive composition, a method for producing an amorphous film, for lithography
- the present invention relates to a material for forming an underlayer film, a composition for forming an underlayer film for lithography, a method for manufacturing an underlayer film for lithography, a method for forming a circuit pattern, and the like.
- the light source for lithography used at the time of resist pattern formation is shortened in wavelength from KrF excimer laser (248 nm) to ArF excimer laser (193 nm).
- KrF excimer laser 248 nm
- ArF excimer laser (193 nm)
- a problem of resolution or a problem that the resist pattern collapses after development occurs, so that thinning of the resist becomes desirable.
- simply reducing the thickness of the resist makes it difficult to obtain a film thickness of a resist pattern sufficient for substrate processing. Therefore, not only a resist pattern, but a resist underlayer film is produced between the resist and the semiconductor substrate to be processed, and a process for providing this resist underlayer film with a function as a mask during substrate processing is also required. .
- a resist underlayer film material containing a polymer having a specific repeating unit has been proposed as a material for realizing a resist underlayer film for lithography having a selection ratio of dry etching rate smaller than that of a resist (for example, patent documents 2)). Furthermore, in order to realize a resist underlayer film for lithography having a dry etching rate selection ratio smaller than that of a semiconductor substrate, a repeating unit of acenaphthylene is copolymerized with a repeating unit having a substituted or non-substituted hydroxy group. A resist underlayer film material containing a polymer obtained by the above method has been proposed (see, for example, Patent Document 3).
- an amorphous carbon underlayer film formed by CVD using methane gas, ethane gas, acetylene gas or the like as a raw material is well known.
- the present inventors have excellent optical properties and etching resistance, and as a material soluble in a solvent and applicable to a wet process, a lower layer for lithography containing a naphthalene formaldehyde polymer containing a specific structural unit and an organic solvent A film forming composition (see, for example, Patent Documents 4 and 5) is proposed.
- middle layer used in formation of the resist underlayer film in three-layer process the formation method (for example, refer patent document 6) of a silicon nitride film, and CVD formation method (for example, silicon nitride film) (for example) Patent Document 7) is known.
- materials containing silsesquioxane-based silicon compounds are known as interlayer materials for the three-layer process (see, for example, Patent Documents 8 and 9).
- the present invention has been made in view of the above-mentioned problems, and its object is to apply a wet process, and to heat resistance, resist pattern shape, etching resistance, embedding property to stepped substrate, and film flatness.
- An object of the present invention is to provide a film-forming material useful for forming an excellent film for lithography, an optical component excellent in heat resistance, transparency and refractive index.
- a further object of the present invention is to provide a film forming composition for lithography, a material for forming an optical component, a resist composition, a permanent film for a resist, a radiation sensitive composition, a lower layer for lithography, comprising the film forming material.
- a film forming material and a composition for forming a lower layer film for lithography and further provide a method for forming a resist pattern, a method for producing an amorphous film, a method for producing an underlayer film for lithography and a method for forming a circuit pattern using these. It is in.
- the present inventors discover that the said subject can be solved by using the compound which has a specific structure, and came to complete this invention. That is, the present invention is as follows.
- R 1 , R 2 and R 3 each independently have a hydrogen atom, a linear alkyl group having 1 to 30 carbon atoms which may have a substituent, or a substituent A branched alkyl group having 1 to 30 carbon atoms which may be substituted, a cycloalkyl group having 3 to 30 carbon atoms which may have a substituent, and an aryl having 6 to 30 carbon atoms which may have a substituent Group, an alkenyl group having 2 to 30 carbon atoms which may have a substituent, an alkoxy group having 1 to 30 carbon atoms which may have a substituent, and 7 carbons which may have a substituent And an alkylaryl group of ⁇ 30, an arylalkyl group having 7 to 30 carbon atoms which may have a substituent, a hydroxyl group or a group in which a hydrogen atom of a hydroxyl
- R 4 , R 5 and R 6 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or 3 to 8 carbon atoms Alkenyl group, aryl group having 6 to 18 carbon atoms, alkyl group having 7 to 18 carbon atoms, or arylalkyl group, wherein the alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or these
- the arylalkyl group may be substituted with a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group, and the alkyl group, the cycloalkyl group, the alkenyl group, the aryl group, the alkylaryl group or arylalkyl group, an ether bond, may contain ketone or ester bond
- S 4 are each independently hydrogen atoms , Hydrate, hydroxyl group
- R 7 , R 8 and R 9 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or 3 to 8 carbon atoms Alkenyl group, aryl group having 6 to 18 carbon atoms, alkyl group having 7 to 18 carbon atoms, or arylalkyl group, wherein the alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or these
- the arylalkyl group may be substituted with a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group, and the alkyl group, the cycloalkyl group, the alkenyl group, the aryl group, the alkylaryl group or arylalkyl group, an ether bond, may contain ketone or ester bond
- S 7, S 8 and S 9 are each independently hydrogen atoms , Hydrate
- R 10 , R 11 and R 12 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or 3 to 8 carbon atoms Alkenyl group, aryl group having 6 to 18 carbon atoms, alkyl group having 7 to 18 carbon atoms, or arylalkyl group, wherein the alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or these
- the arylalkyl group may be substituted with a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group, and the alkyl group, the cycloalkyl group, the alkenyl group, the aryl group, the alkylaryl group or arylalkyl group may contain an ether bond, ketone bond or an ester bond
- Y 10, Y 11 and Y 12 are each independently A hydrogen
- R 13 , R 14 and R 15 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, and the alkyl group is a hydroxyl group or 1 to 12 carbon atoms
- the alkyl group may be substituted by an alkoxy group, and the alkyl group may contain an ether bond, a ketone bond or an ester bond.
- R 16 , R 17 and R 18 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms substituted with a methacryloyloxy group or an acryloyloxy group
- the alkyl group may be substituted with a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an acyloxy group having 1 to 8 carbon atoms, and the alkyl group may contain an ether bond, a ketone bond or an ester bond.
- Y 13 , Y 14 and Y 15 are each independently a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, an alkyl group having 1 to 12 carbon atoms, alkoxy Group, alkoxycarbonyl group, arylalkyl group or alkenyl group having 2 to 8 carbon atoms is shown) [8]
- a composition for forming a film for lithography which comprises at least one selected from the group consisting of the film-forming materials according to any one of [1] to [8].
- a material for forming an optical component which contains one or more selected from the group consisting of the film-forming material according to any one of [1] to [8].
- a resist composition comprising one or more selected from the group consisting of the film-forming material according to any one of [1] to [8].
- the resist composition as described in [11] which further contains a solvent.
- the content ratio ((A) / (B) / (D)) of the component (A), the diazonaphthoquinone photoactive compound (B) and the other optional component (D) is the radiation sensitivity.
- the radiation sensitive composition according to [17] which is 1 to 99% by mass / 99 to 1% by mass / 0 to 98% by mass with respect to 100% by mass of the solid content of the composition.
- the radiation sensitive composition as described in [17] or [18] which can form an amorphous film by spin coating.
- a method for producing an amorphous film comprising the step of forming an amorphous film on a substrate using the radiation sensitive composition according to any one of [17] to [19].
- An underlayer film-forming material for lithography which comprises one or more selected from the group consisting of the film-forming materials according to any one of [1] to [8].
- a composition for forming an underlayer film for lithography comprising the underlayer film forming material for lithography according to [22] and a solvent.
- the composition for lower-layer film formation for lithography as described in [23] which further contains an acid generator.
- a method for producing an underlayer film for lithography comprising the step of forming an underlayer film on a substrate using the composition for forming an underlayer film for lithography according to any one of [23] to [25].
- a wet process is applicable, and a film for lithography excellent in heat resistance, resist pattern shape, etching resistance, embedding property to stepped substrate, and film flatness, heat resistance, transparency and refractive index A film-forming material etc. useful for forming an optical component etc. excellent in
- the present embodiment is an illustration for demonstrating this invention, and this invention is not limited only to this embodiment.
- the film forming material contains a triazine compound represented by the following formula (1).
- film means, for example, those applicable to films for lithography, optical components, etc. (but not limited thereto), and is typically used for lithography. It has a general form as a film or an optical component. That is, the “film-forming material” is a precursor of such a film, and its form and / or composition is clearly distinguished from the “film”.
- film for lithography is a concept broadly including, for example, a film for lithography applications such as a permanent film for resist, an underlayer film for lithography and the like.
- each of R 1 , R 2 and R 3 independently has a hydrogen atom, a linear alkyl group having 1 to 30 carbon atoms which may have a substituent, or a substituent A branched alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 3 to 30 carbon atoms which may have a substituent, and an aryl group having 6 to 30 carbon atoms which may have a substituent And an alkenyl group having 2 to 30 carbon atoms which may have a substituent, an alkoxy group having 1 to 30 carbon atoms which may have a substituent, and 7 to carbon atoms which may have a substituent.
- alkylaryl group an optionally substituted arylalkyl group having 7 to 30 carbon atoms, a hydroxyl group or a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group
- the alkoxy group, the alkylaryl group or the arylalkyl group may contain an ether bond, a ketone bond, an ester bond or a crosslinkable reactive group.
- S 1 , S 2 and S 3 each independently represent a hydrogen atom, a hydroxyl group or an alkoxy group having 1 to 30 carbon atoms
- T 1 , T 2 and T 3 each independently represent a hydrogen atom, a hydroxyl group or carbon
- Y 1 , Y 2 and Y 3 independently represents a hydrogen atom, a hydroxyl group, a hydrogen atom of an hydroxyl group, an acid dissociable group or a crosslinkable group.
- a group substituted by a reactive group, an alkyl group having 1 to 30 carbon atoms, an alkoxy group, an alkoxycarbonyl group, an arylalkyl group or an alkenyl group having 2 to 30 carbon atoms is shown.
- E 1 , E 2 and E 3 each independently represent a single bond, -O-, -CH 2 O-, -COO- or -NH-.
- P each independently represents an integer of 0 to 1.
- linear alkyl group having 1 to 30 carbon atoms which may have a substituent include, but are not limited to, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl Groups, heptyl groups, octyl groups, nonyl groups, decyl groups, cyclopropylmethyl groups, cyclohexylmethyl, 2-hydroxypropyl, 2-methoxyethyl groups and the like.
- Examples of the branched alkyl group having 1 to 30 carbon atoms which may have a substituent include, but are not limited to, 1-methylethyl group, 2-methylpropyl group, 2-methylbutyl group, 2-methyl group Examples thereof include pentyl group, 2-methylhexyl group, 2-methylheptyl group, 2-methyloctyl group, 2-methylnonyl group, 2-methyldecyl group and the like.
- Examples of the cycloalkyl group having 3 to 30 carbon atoms which may have a substituent include, but are not limited to, for example, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group and the like Can be mentioned.
- aryl group having 6 to 30 carbon atoms which may have a substituent include, but are not limited to, phenyl group, methylphenyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group , Hexylphenyl group, heptylphenyl group, octylphenyl group, nonylphenyl group, decylphenyl group, dimethylphenyl group, diethylphenyl group, dipropylphenyl group, dibutylphenyl group, dipentylphenyl group, dihexylphenyl group, 1-methyl -1-phenylethyl group, trimethylphenyl group, triethylphenyl group, butylmethylphenyl group, butylethylphenyl group, hydroxyphenyl group, dihydroxyphenyl group, tetrahydroxyphenyl group, fluor
- alkenyl group having 2 to 30 carbon atoms which may have a substituent include, but are not limited to, propenyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group and the like.
- the alkoxy group having 1 to 30 carbon atoms which may have a substituent is not limited to the following, and examples thereof include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, a second butoxy group, and a second butoxy group. And 3 butoxy, pentyloxy, hexyloxy, heptyloxy, octoxy, decyloxy and the like.
- alkylaryl group having 7 to 30 carbon atoms examples include, but are not limited to, methylphenyl group, dimethylphenyl group, ethylphenyl group, octylphenyl group and the like.
- arylalkyl group having 7 to 30 carbon atoms examples include, but are not limited to, benzyl group, 2-phenylethyl, 1-methyl-1-phenylethyl group and the like.
- the "acid dissociable group” refers to a characteristic group which is cleaved in the presence of an acid to cause a change to an alkali-soluble group or the like.
- the alkali-soluble group include, but are not limited to, phenolic hydroxyl group, carboxyl group, sulfonic acid group, hexafluoroisopropanol group and the like, and phenolic hydroxyl group and carboxyl group are preferable, and phenolic hydroxyl group is particularly preferable.
- the acid dissociable group can be appropriately selected from those proposed in hydroxystyrene resins used in chemically amplified resist compositions for KrF and ArF, (meth) acrylic acid resins, etc. There is no particular limitation. Examples of the acid dissociable group include, but are not limited to, acid dissociable groups described in JP 2012-136520A.
- crosslinkable reactive group refers to a group that crosslinks in the presence or absence of a catalyst.
- the crosslinkable reactive group is not particularly limited, and examples thereof include an alkoxy group having 1 to 20 carbon atoms, a group having an allyl group, a group having a (meth) acryloyl group, a group having an epoxy (meth) acryloyl group, and a hydroxyl group.
- groups having a urethane (meth) acryloyl group a group having a glycidyl group, a group having a vinyl-containing phenylmethyl group, and a group having a styrene group.
- the group having an allyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-1).
- n X1 is an integer of 1 to 5.
- the group having a (meth) acryloyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-2).
- n X2 is an integer of 1 to 5
- R X is a hydrogen atom or a methyl group.
- the group having an epoxy (meth) acryloyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-3).
- an epoxy (meth) acryloyl group means the group which epoxy (meth) acrylate and a hydroxyl group react and produce
- n x3 is an integer of 0 to 5
- R X is a hydrogen atom or a methyl group.
- the group having a urethane (meth) acryloyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-4).
- n x 4 is an integer of 0 to 5
- s is an integer of 0 to 3
- R X is a hydrogen atom or a methyl group.
- the group having a hydroxyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-5).
- n x 5 is an integer of 1 to 5.
- the group having a glycidyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-6).
- n x 6 is an integer of 1 to 5.
- the group having a vinyl-containing phenylmethyl group is not particularly limited, and examples thereof include a group represented by the following formula (X-7).
- n x 7 is an integer of 1 to 5.
- the group having a styrene group is not particularly limited, and examples thereof include a group represented by the following formula (X-8).
- n x 8 is an integer of 1 to 5.
- a group having a (meth) acryloyl group, an epoxy (meth) acryloyl group, a urethane (meth) acryloyl group, a glycidyl group, or a styrene group is preferable, and (meth) acryloyl group is preferable.
- the group which has a group, an epoxy (meth) acryloyl group, and a urethane (meth) acryloyl group is more preferable, and a group which has a (meth) acryloyl group is more preferable.
- R 1 , R 2 and R 3 from the viewpoint of solvent solubility and heat resistance, hydrogen atom, hydroxyl group, methyl group, ethyl group, propyl group, butyl group, 1-methylethyl group, 2-methylpropyl group, 2-Methylbutyl group, 2-methylpentyl group, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, methylphenyl group, ethylphenyl group, propylphenyl group, butylphenyl group, propenyl group, butenyl group, methoxy group, ethoxy Preferred is a propoxy group, isopropoxy group, butoxy group, secondary butoxy group, tertiary butoxy group, pentyloxy group and hexyloxy group.
- S 1 , S 2 and S 3 each independently represent a hydrogen atom, a hydroxyl group or an alkoxy group having 1 to 30 carbon atoms.
- alkoxy group having 1 to 30 carbon atoms include, but are not limited to, a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group and a butoxy group.
- a hydrogen atom, a hydroxyl group and a methyl group are preferable, and a hydroxyl group is more preferable.
- T 1 , T 2 and T 3 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 30 carbon atoms or an alkenyl group having 2 to 30 carbon atoms.
- alkyl group having 1 to 30 carbon atoms examples include, but are not limited to, methyl group, ethyl group, propyl group, isopropyl group, butyl group, secondary butyl group, tertiary butyl group, tertiary butyl group, isobutyl group, amyl group, and the like.
- a tertiary amyl group, an octyl group, a tertiary octyl group etc. are mentioned.
- alkenyl group having 2 to 30 carbon atoms examples include, but are not limited to, vinyl group, propenyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group and the like.
- T 1 , T 2 and T 3 a hydrogen atom, a hydroxyl group and a methyl group are preferable from the viewpoint of solubility and heat resistance.
- each of Y 1 , Y 2 and Y 3 independently represents a hydrogen atom, a hydroxyl group, a group having a hydrogen atom of a hydroxyl group substituted with an acid dissociable group or a crosslinkable reactive group, a carbon number of 1 to 6 30 alkyl group, alkoxy group, alkoxycarbonyl group, arylalkyl group or alkenyl group having 2 to 30 carbon atoms.
- Examples of the alkyl group having 1 to 30 carbon atoms include a linear alkyl group having 1 to 30 carbon atoms and a branched alkyl group.
- Examples of the linear alkyl group having 1 to 30 carbon atoms include, but are not limited to, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, and the like. Examples include decyl, cyclopropylmethyl, cyclohexylmethyl, 2-hydroxypropyl, 2-methoxyethyl and the like.
- C1-C30 branched alkyl group although it is not limited to the following, For example, 1-methylethyl group, 2-methylpropyl group, 2-methylbutyl group, 2-methylpentyl group, 2-methylhexyl Groups, 2-methylheptyl group, 2-methyloctyl group, 2-methylnonyl group, 2-methyldecyl group and the like.
- alkoxy group having 1 to 30 carbon atoms examples include, but are not limited to, for example, methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, second butoxy group, third butoxy group, third butoxy group, pentyloxy group, hexyl An oxy group, a heptyloxy group, an octoxy group, a decyloxy group etc. are mentioned.
- alkoxycarbonyl group having 1 to 30 carbon atoms examples include, but are not limited to, derivatives of the above alkoxy groups, for example.
- arylalkyl group having 1 to 30 carbon atoms examples include, but are not limited to, cumyl group and phenylmethylene group.
- alkenyl group having 2 to 30 carbon atoms examples include, but are not limited to, propenyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group and the like.
- a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, and a methyl group are preferable from the viewpoint of solubility and heat resistance More preferred is a hydroxyl group.
- formula (1) it is preferable that at least one of R 1 to R 3 in the above has an acid dissociable group and / or a crosslinkable reactive group. From the same viewpoint, it is preferable that at least one of S 1 to S 3 in the formula (1) has an acid dissociable group and / or a crosslinkable reactive group. Furthermore, from the same viewpoint, it is preferable that at least one of Y 1 to Y 3 in the formula (1) has an acid dissociable group and / or a crosslinkable reactive group.
- the content of the triazine compound represented by the formula (1) in the film-forming material of the present embodiment is preferably 50 to 100% by mass, from the viewpoint of heat resistance and etching resistance, and is preferably 60 to 100%. % Is more preferable, 70 to 100% by mass is further preferable, and 80 to 100% by mass is particularly preferable.
- the triazine-based compound in the film-forming material of the present embodiment has a structure as described above, so it has high heat resistance and high solvent solubility. Moreover, it is preferable that it is a compound represented by following formula (2) from the solubility to a solvent, and a heat resistant viewpoint of the triazine type-compound represented by Formula (1) of this embodiment.
- R 4 , R 5 and R 6 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or 3 to 8 carbon atoms And an alkenyl group, an aryl group having 6 to 18 carbon atoms, an alkyl aryl group having 7 to 18 carbon atoms, or an arylalkyl group.
- these alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or arylalkyl group may be substituted by a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group.
- alkyl group, the cycloalkyl group, the alkenyl group, the aryl group, the alkylaryl group or the arylalkyl group may contain an ether bond, a ketone bond or an ester bond.
- S 4 , S 5 and S 6 each independently represent a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, or an alkoxy group having 1 to 4 carbon atoms
- T 4 , T 5 and T 6 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms
- Y 4 , Y 5 and Y 6 each represent Independently, a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociative group or a crosslinkable reactive group, an alkyl group having 1 to 12 carbon atoms, an alkoxy group, an alkoxycarbonyl group, an arylalkyl group or carbon 2 to 8 represent an alkenyl group.
- linear alkyl group having 1 to 12 carbon atoms examples include, but are not limited to, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, and the like.
- Nonyl group, decyl group, icosyl group, triacontyl group, cyclopropylmethyl group, cyclohexylmethyl group, adamantylmethyl group and the like can be mentioned.
- Examples of the branched alkyl group having 1 to 12 carbon atoms include, but are not limited to, 1-methylethyl group, 2-methylpropyl group, 2-methylbutyl group, 2-methylpentyl group, 2-methylhexyl group, and the like. Examples include 2-methylheptyl group, 2-methyl octyl group, 2-methyl nonyl group, 2-methyl decyl group, 2-methyl icosyl group, 2-methyl nonacosyl group and the like.
- cycloalkyl group having 3 to 8 carbon atoms examples include, but are not limited to, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cyclooctadecyl group. Groups, adamantyl groups and the like.
- aryl group having 6 to 18 carbon atoms examples include, but are not limited to, phenyl group, methylphenyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptylphenyl group.
- alkenyl group having 3 to 8 carbon atoms examples include, but are not limited to, linear and branched propenyl groups, butenyl groups, pentenyl groups, hexenyl groups, heptenyl groups, octenyl groups and the like.
- alkylaryl group having 7 to 18 carbon atoms examples include, but are not limited to, methylphenyl group, dimethylphenyl group, ethylphenyl group and octylphenyl group.
- arylalkyl group having 7 to 18 carbon atoms examples include, but are not limited to, benzyl group, 2-phenylethyl, 1-methyl-1-phenylethyl group and the like.
- alkoxy group having 1 to 12 carbon atoms examples include, but are not limited to, for example, methoxy group, ethoxy group, propoxy group, butoxy group, pentoxy group, hexaoxy group, octoxy group, nonyloxy group, decyloxy group, undecyloxy group. And dodecyloxy groups.
- R 4 , R 5 and R 6 each are a hydrogen atom, a methyl group, an ethyl group, a propyl group, a butyl group, a 1-methylethyl group, a 2-methylpropyl group from the viewpoint of solvent solubility and heat resistance.
- Examples of S 4 , S 5 and S 6 in the above formula (2) include the groups exemplified as S 1 , S 2 and S 3 in the above formula (1).
- T 4 , T 5 and T 6 in the formula (2) include the groups exemplified for T 1 , T 2 and T 3 in the formula (1).
- Examples of Y 4 , Y 5 and Y 6 in the formula (2) include groups exemplified for Y 1 , Y 2 and Y 3 in the formula (1).
- each of R 7 , R 8 and R 9 independently represents a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or 3 to 8 carbon atoms And an alkenyl group, an aryl group having 6 to 18 carbon atoms, an alkyl aryl group having 7 to 18 carbon atoms, or an arylalkyl group.
- these alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or arylalkyl group may be substituted by a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group.
- alkyl group, the cycloalkyl group, the alkenyl group, the aryl group, the alkylaryl group, or the arylalkyl group may contain an ether bond, a ketone bond, or an ester bond.
- S 7 , S 8 and S 9 each independently represent a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, or an alkoxy group having 1 to 4 carbon atoms .
- Y 7 , Y 8 and Y 9 are each independently a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, an alkyl group having 1 to 12 carbon atoms, an alkoxy group , An alkoxycarbonyl group, an arylalkyl group or an alkenyl group having 2 to 8 carbon atoms.
- R 7 , R 8 and R 9 in the formula (3) include the groups exemplified for R 4 , R 5 and R 6 in the formula (2).
- Examples of S 7 , S 8 and S 9 in the formula (3) include the groups exemplified for S 4 , S 5 and S 6 in the formula (2).
- Examples of Y 7 , Y 8 and Y 9 in the formula (3) include the groups exemplified for Y 4 , Y 5 and Y 6 in the formula (2).
- each of R 10 , R 11 and R 12 independently represents a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, or 3 to 8 carbon atoms And an alkenyl group, an aryl group having 6 to 18 carbon atoms, an alkyl aryl group having 7 to 18 carbon atoms, or an arylalkyl group.
- these alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or arylalkyl group may be substituted by a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group.
- alkyl group, the cycloalkyl group, the alkenyl group, the aryl group, the alkylaryl group or the arylalkyl group may contain an ether bond, a ketone bond or an ester bond.
- Y 10 , Y 11 and Y 12 each independently represent a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, an alkyl group having 1 to 12 carbon atoms, an alkoxy group , An alkoxycarbonyl group, an arylalkyl group or an alkenyl group having 2 to 8 carbon atoms.
- R 10 , R 11 and R 12 in the formula (4) include the groups exemplified for R 7 , R 8 and R 9 in the formula (3).
- Examples of Y 10 , Y 11 and Y 12 in the formula (4) include the groups exemplified for Y 7 , Y 8 and Y 9 in the formula (3).
- R 13 , R 14 and R 15 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, and the alkyl group is a hydroxyl group or an alkoxy having 1 to 12 carbon atoms. It may be substituted by a group. Further, the alkyl group may contain an ether bond, a ketone bond or an ester bond.
- the linear or branched alkyl group having 1 to 12 carbon atoms and the alkoxy group having 1 to 12 carbon atoms in R 13 , R 14 and R 15 in the above-mentioned formula (5) are R 4 and R 5 in the above-mentioned formula (2) And the groups exemplified for R 6 .
- the film-forming material according to another aspect of the present embodiment contains a triazine compound represented by the following formula (6), and can be preferably used particularly as a material for forming a photocurable film. .
- R 16 , R 17 and R 18 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms substituted with a methacryloyloxy group or an acryloyloxy group
- the alkyl group may be substituted by a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an acyloxy group having 1 to 8 carbon atoms, and the alkyl group may contain an ether bond, a ketone bond or an ester bond.
- Y 13 , Y 14 and Y 15 each independently represent a hydrogen atom, a hydroxyl group, a group in which a hydrogen atom of a hydroxyl group is substituted with an acid dissociable group or a crosslinkable reactive group, an alkyl group having 1 to 12 carbon atoms, Represents an alkoxy group, an alkoxycarbonyl group, an arylalkyl group or an alkenyl group having 2 to 8 carbon atoms)
- the methacryloyloxy group is a group in which Z in the following formula (7) is represented by a methyl group, and in the acryloyloxy group, Z in the following formula (7) is represented by a hydrogen atom It is a group.
- Z represents a hydrogen atom or a methyl group
- the linear or branched alkyl group having 1 to 12 carbon atoms and the alkoxy group having 1 to 8 carbon atoms in R 16 , R 17 and R 18 in the above formula (6) are R 4 and R 5 in the above formula (2) And the groups exemplified for R 6 .
- R 16 , R 17 and R 18 are preferably alkyl groups having 1 to 8 carbon atoms, which are substituted with an acryloyloxy group, because the ultraviolet ray absorbing ability and the ultraviolet ray curability are superior to the methacryloyloxy group.
- the position of substitution by the methacryloyloxy group or the acryloyloxy group may be any position of the linear or branched alkyl group having 1 to 12 carbon atoms.
- acyloxy group having 1 to 8 carbon atoms among the examples of the linear or branched alkyl group having 1 to 12 carbon atoms, an acyloxy group corresponding to the alkyl group having 1 to 8 carbon atoms can be mentioned.
- Examples of Y 13 , Y 14 and Y 15 in the formula (6) include the groups exemplified for Y 4 , Y 5 and Y 6 in the formula (2).
- the film-forming material of the present embodiment includes, in addition to the triazine compound represented by the formula (6), one or more selected from the group consisting of a photocurable monomer, a photocurable oligomer, and a photocurable polymer,
- the photocurable film-forming material may further contain a polymerization initiator.
- a photocurable monomer, a photocurable oligomer, and a photocurable polymer what has one or more functional groups which can be radically polymerized is preferable, and a (meth) acrylate compound is preferable.
- the content of the photocurable monomer, the photocurable oligomer, and the photocurable polymer is preferably 80 to 95% by mass with respect to the entire photocurable film-forming material.
- photopolymerization initiator examples include, but are not limited to, IRGACURE 651, IRGACURE 184, IRGACURE 907, IRGACURE 369E, IRGACURE 819, IRGACURE OXE01, and IRGACURE OXE02 manufactured by BASF.
- the content of the photopolymerization initiator is preferably 0.1 to 10% by mass with respect to the entire photocurable film-forming material.
- triazine compound in the present embodiment include compounds such as the compounds BisN-1 to BisN-19 shown below, but are not limited to those listed here.
- the compound represented by Formula (5) is preferably a triazine compound represented by Formula (BisN-8) from the viewpoint of heat resistance.
- the film-forming material of the present embodiment has a rigid triazine skeleton, is susceptible to a crosslinking reaction by high-temperature baking, and exhibits high heat resistance.
- the film-forming material of the present embodiment has high solubility in organic solvents and high solubility in safe solvents despite having an aromatic structure.
- the underlayer film for lithography composed of the composition for forming a film for lithography of the present embodiment described later is excellent in the embedding property to the step substrate and the flatness of the film, so that an excellent resist pattern can be obtained.
- the film-forming material of this embodiment makes it possible to make high refractive index and heat resistance compatible at a high level by introducing a triazine ring.
- the film formation composition for lithography in the present embodiment contains the film formation material in the present embodiment described above.
- the film-forming material in the present embodiment contains the compound represented by the formula (1) and one or more substances selected from the group of compounds; And the compound selected from the group of compounds are also referred to as “the compound of the present embodiment” or “component (A)”.
- the material for forming an optical component of the present embodiment contains the film forming material of the present embodiment described above.
- the “optical component” is a film-like or sheet-like component, a plastic lens (a prism lens, a lenticular lens, a microlens, a Fresnel lens, a viewing angle control lens, a contrast improvement lens, etc.), a retardation film, It refers to a film for electromagnetic wave shielding, a prism, an optical fiber, a solder resist for flexible printed wiring, a plating resist, an interlayer insulating film for a multilayer printed wiring board, and a photosensitive optical waveguide.
- the compounds in this embodiment are useful for these optical component forming applications.
- the resist composition of the present embodiment contains the film-forming material of the present embodiment described above.
- the resist composition of the present embodiment preferably further contains a solvent.
- the solvent is not particularly limited, and examples thereof include those described in International Publication WO 2013-024778. These solvents may be used alone or in combination of two or more.
- the solvent is preferably a safe solvent, more preferably PGMEA (propylene glycol monomethyl ether acetate), PGME (propylene glycol monomethyl ether), CHN (cyclohexanone), CPN (cyclopentanone), ortho-xylene (OX) And at least one selected from 2-heptanone, anisole, butyl acetate, ethyl propionate and ethyl lactate.
- PGMEA propylene glycol monomethyl ether acetate
- PGME propylene glycol monomethyl ether
- CHN cyclohexanone
- CPN cyclopentanone
- OF ortho-xylene
- the amount of the solid component and the amount of the solvent are not particularly limited, but 1 to 80 mass% of the solid component and 20 to 99 mass of the solvent with respect to 100 mass% of the total mass of the solid component and the solvent. %, More preferably 1 to 50% by weight of solid component and 50 to 99% by weight of solvent, still more preferably 2 to 40% by weight of solid component and 60 to 98% by weight of solvent, particularly preferably solid component 2 to 10% by mass and 90 to 98% by mass of a solvent.
- the resist composition of the present embodiment may contain, as necessary, a crosslinking agent, an acid generator, and the like, in addition to the compound having the structure represented by the above-mentioned formula (1) and one or more substances selected from the compound group.
- You may contain other components, such as an organic solvent.
- these optional components will be described.
- the resist composition of this embodiment generates an acid directly or indirectly by irradiation of any radiation selected from visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet (EUV), X-ray and ion beam. It is preferable to contain 1 or more types of acid generators (C).
- the acid generator (C) is not particularly limited, and for example, those described in International Publication WO 2013/024778 can be used.
- the acid generator (C) can be used alone or in combination of two or more. Among these acid generators, from the viewpoint of heat resistance, acid generators having an aromatic ring are preferable, and acid generators having a structure represented by the following formula (8-1) or (8-2) are more preferable. .
- R 13 may be the same or different, and each independently represents a hydrogen atom, a linear, branched or cyclic alkyl group, linear, branched or cyclic alkoxy group, a hydroxyl group or a halogen atom,
- X - represents an alkyl group, an aryl group, a sulfonic acid ion or halide ion having a halogen-substituted alkyl group or halogen-substituted aryl group).
- R 14 s may be the same or different, and each independently represent a hydrogen atom, a linear, branched or cyclic alkyl group, a linear, branched or cyclic And represents an alkoxy group, a hydroxyl group or a halogen atom, and X - is as defined above.
- a compound in which X ⁇ of the above formula (8-1) or (8-2) is a sulfonate ion having an aryl group or a halogen-substituted aryl group is more preferable, and a sulfonate ion having an aryl group
- the compound which is is more preferable, and diphenyltrimethylphenylsulfonium-p-toluenesulfonate, triphenylsulfonium-p-toluenesulfonate, triphenylsulfonium trifluoromethanesulfonate, and triphenylsulfonium nonafluoromethanesulfonate are particularly preferable.
- the amount of the acid generator (C) used is preferably 0.001 to 49% by mass, more preferably 1 to 40% by mass, still more preferably 3 to 30% by mass, and still more preferably 10 to 25% by mass of the total mass of solid components. Particularly preferred. By using it within the above range, a pattern profile with high sensitivity and low edge roughness tends to be obtained.
- the method of generating the acid is not limited as long as the acid is generated in the system. Fine processing is possible by using an excimer laser instead of ultraviolet rays such as g-line and i-line, and further fine processing by using electron beams, extreme ultraviolet rays, X-rays and ion beams as high energy rays. Is possible.
- the resist composition of the present embodiment preferably contains one or more acid crosslinking agents (G).
- the acid crosslinking agent (G) is a compound capable of intramolecularly or intermolecularly crosslinking the component (A) in the presence of the acid generated from the acid generator (C).
- an acid crosslinking agent (G) for example, a compound having one or more groups capable of crosslinking the component (A) (hereinafter, referred to as "crosslinkable group”) can be mentioned.
- a crosslinkable group for example, (i) hydroxyalkyl groups such as hydroxy (C1-C6 alkyl group), C1-C6 alkoxy (C1-C6 alkyl group), acetoxy (C1-C6 alkyl group) or the like or (Ii) a carbonyl group such as formyl group, carboxy (C1-C6 alkyl group) or a group derived therefrom; (iii) dimethylaminomethyl group, diethylaminomethyl group, dimethylolaminomethyl group, Nitrogen-containing groups such as tyrolyl aminomethyl and morpholinomethyl; (iv) glycidyl ether such as glycidyl ether, glycidyl ester and glycidyl amino; glycidyl-containing groups such as glycidyl amino; C1-C6 allyloxy (C1-C6 alkyl group), C1 C6 aralkyloxy
- an acid crosslinking agent (G) which has the said crosslinkable group Although it does not specifically limit as an acid crosslinking agent (G) which has the said crosslinkable group, For example, the thing as described in international publication WO2013 / 024778 can be used.
- the acid crosslinking agent (G) can be used alone or in combination of two or more.
- the amount of the acid crosslinking agent (G) used is preferably 0.5 to 49% by mass, more preferably 0.5 to 40% by mass, still more preferably 1 to 30% by mass, and still more preferably 2 to 20% by mass of the total mass of solid components. % Is particularly preferred.
- the compounding ratio of the acid crosslinking agent (G) is 0.5% by mass or more, the effect of suppressing the solubility of the resist film in an alkali developer is improved, and the residual film rate is decreased, or the pattern is swelled or meandered. On the other hand, when it is 49 mass% or less, it tends to be able to suppress the heat resistant fall as a resist.
- the resist composition of this embodiment controls the diffusion of an acid generated from an acid generator by radiation irradiation in a resist film, and has an acid diffusion control agent having an effect of preventing undesirable chemical reaction in an unexposed area. (E) may be included.
- Use of such an acid diffusion control agent (E) improves the storage stability of the resist composition.
- the resolution is improved, and the line width change of the resist pattern due to the change of the setting time before radiation irradiation and the setting time after radiation irradiation can be suppressed, and the process stability is extremely excellent.
- Examples of such an acid diffusion control agent (E) include, but are not particularly limited to, radiation degradable basic compounds such as nitrogen atom-containing basic compounds, basic sulfonium compounds and basic iodonium compounds.
- the acid diffusion control agent (E) is not particularly limited, and for example, those described in International Publication WO 2013/024778 can be used.
- the acid diffusion control agent (E) can be used alone or in combination of two or more.
- the blending amount of the acid diffusion control agent (E) is preferably 0.001 to 49% by mass, more preferably 0.01 to 10% by mass, still more preferably 0.01 to 5% by mass, based on the total mass of the solid component. .01 to 3% by mass is particularly preferred.
- the above range deterioration in resolution, pattern shape, dimensional fidelity and the like can be prevented. Furthermore, even if the placement time from electron beam irradiation to heating after radiation irradiation is long, there is little possibility that the shape of the pattern upper layer portion is deteriorated.
- the compounding amount is 10% by mass or less, it is possible to prevent a decrease in sensitivity, developability of unexposed area, and the like.
- the storage stability of the resist composition is improved, and the resolution is improved, and also due to the change of the setting time before irradiation and the setting time after irradiation.
- the line width change of the resist pattern can be suppressed, and the process stability is extremely excellent.
- the solubility enhancer enhances the solubility of the compound represented by the formula (1) when the solubility of the compound represented by the formula (1) is too low, and has an effect of appropriately increasing the dissolution rate of the compound during development. And can be used as needed.
- examples of the above-mentioned dissolution promoter include low molecular weight phenolic compounds such as bisphenols and tris (hydroxyphenyl) methane. These dissolution promoters can be used alone or in combination of two or more.
- the compounding quantity of a dissolution promoter is suitably adjusted according to the kind of said compound to be used, 0 to 49 mass% of the solid component total mass is preferable, 0 to 5 mass% is more preferable, and 0 to 1 mass%. Is more preferable, and 0% by mass is particularly preferable.
- the solubility controlling agent is a component having an effect of controlling the solubility of the compound represented by the formula (1) to an appropriate degree to reduce the dissolution rate during development when the solubility of the compound represented by the formula (1) is too high.
- a dissolution control agent one which does not chemically change in steps such as baking of a resist film, radiation irradiation, development and the like is preferable.
- the dissolution control agent is not particularly limited, and examples thereof include aromatic hydrocarbons such as phenanthrene, anthracene and acenaphthene; ketones such as acetophenone, benzophenone and phenylnaphthyl ketone; methyl phenyl sulfone, diphenyl sulfone, dinaphthyl sulfone and the like Sulfones and the like can be mentioned. These dissolution controlling agents can be used alone or in combination of two or more.
- the compounding quantity of a solubility control agent is suitably adjusted according to the kind of said compound to be used, 0 to 49 mass% of the solid component total mass is preferable, 0 to 5 mass% is more preferable, and 0 to 1 mass%. Is more preferable, and 0% by mass is particularly preferable.
- the sensitizer has the function of absorbing the energy of the irradiated radiation and transferring the energy to the acid generator (C), thereby increasing the amount of acid generation, thereby improving the apparent sensitivity of the resist. It is an ingredient that As such a sensitizer, for example, benzophenones, biacetyls, pyrenes, phenothiazines, fluorenes and the like can be mentioned, but there is no particular limitation. These sensitizers can be used alone or in combination of two or more.
- the compounding quantity of a sensitizer is suitably adjusted according to the kind of said compound to be used, 0 to 49 mass% of the solid component total mass is preferable, 0 to 5 mass% is more preferable, and 0 to 1 mass% is More preferably, 0% by mass is particularly preferred.
- the surfactant is a component having the function of improving the coatability and striation of the resist composition, the developability of the resist, and the like.
- any of anionic surfactant, cationic surfactant, nonionic surfactant or amphoteric surfactant may be used.
- Preferred surfactants are nonionic surfactants.
- the nonionic surfactant has a good affinity to the solvent used for producing the resist composition, and the above-mentioned effects become more remarkable.
- Examples of nonionic surfactants include polyoxyethylene higher alkyl ethers, polyoxyethylene higher alkyl phenyl ethers, higher fatty acid diesters of polyethylene glycol and the like, but are not particularly limited.
- F-top (manufactured by Gemco), Megafuck (manufactured by Dainippon Ink and Chemicals, Inc.), Florard (manufactured by Sumitomo 3M), Asahi Guard, Surfron (manufactured by Asahi Glass Co., Ltd.) PEPOL (made by Toho Chemical Industry Co., Ltd.), KP (made by Shin-Etsu Chemical Co., Ltd.), Polyflow (made by Kyoeisha Yuka Chemical Co., Ltd.), etc. can be mentioned.
- the compounding quantity of surfactant is suitably adjusted according to the kind of said compound to be used, 0 to 49 mass% of the solid component total mass is preferable, 0 to 5 mass% is more preferable, and 0 to 1 mass%. Is more preferable, and 0% by mass is particularly preferable.
- the resist composition may further contain, as an optional component, an organic carboxylic acid or an oxo acid of phosphorus or a derivative thereof as an optional component for the purpose of preventing the sensitivity deterioration or improving the resist pattern shape, the storage stability and the like.
- An organic carboxylic acid or phosphorus oxo acid or a derivative thereof can be used in combination with an acid diffusion control agent or may be used alone.
- the organic carboxylic acid for example, malonic acid, citric acid, malic acid, succinic acid, benzoic acid, salicylic acid and the like are suitable.
- Examples of phosphorus oxo acids or derivatives thereof include phosphoric acid, phosphoric acid di-n-butyl ester, phosphoric acid such as phosphoric acid diphenyl ester or derivatives thereof such as phosphonic acid, phosphonic acid dimethyl ester, phosphonic acid di- Phosphonic acids such as n-butyl ester, phenyl phosphonic acid, phosphonic acid diphenyl ester, phosphonic acid dibenzyl ester or derivatives thereof, phosphinic acid, derivatives such as phosphinic acids such as phenyl phosphinic acid and derivatives thereof Among these, phosphonic acid is particularly preferred.
- Organic carboxylic acids or phosphorus oxo acids or derivatives thereof can be used alone or in combination of two or more.
- the compounding quantity of the oxo acid of organic carboxylic acid or phosphorus, or its derivative (s) is suitably adjusted according to the kind of said compound to be used, 0-49 mass% of the solid component total mass is preferable, and 0-5 mass% More preferably, 0 to 1% by mass is more preferable, and 0% by mass is particularly preferable.
- additives include, for example, dyes, pigments, adhesion assistants, and the like.
- a dye or a pigment because the latent image in the exposed area can be visualized to reduce the influence of halation at the time of exposure.
- an adhesion promoter because the adhesion to the substrate can be improved.
- examples of other additives include antihalation agents, storage stabilizers, antifoaming agents, shape improvers and the like, and specific examples include 4-hydroxy-4′-methylchalcone and the like.
- the total amount of the optional component (F) is 0 to 99% by mass, preferably 0 to 49% by mass, more preferably 0 to 10% by mass, based on the total mass of the solid components. -5% by mass is more preferable, 0-1% by mass is more preferable, and 0% by mass is particularly preferable.
- the content of the compound of the present embodiment and one or more substances (component (A)) selected from the compound group is not particularly limited, but the total mass of solid components Sum of solid components including optional components such as A), acid generator (C), acid crosslinker (G), acid diffusion control agent (E) and other components (F), and so on) It is preferably 50 to 99.4% by mass, more preferably 55 to 90% by mass, still more preferably 60 to 80% by mass, and particularly preferably 60 to 70% by mass.
- the resolution is further improved, and the line edge roughness (LER) tends to be further reduced.
- the content ratio of (component (A), acid generator (C), acid crosslinker (G), acid diffusion control agent (E), optional component (F) is preferably 50 to 99 based on 100% by mass of the solid content of the resist composition.
- the resist composition of the present embodiment is usually prepared by dissolving each component in a solvent at the time of use to form a uniform solution, and then filtering it with, for example, a filter with a pore diameter of about 0.2 ⁇ m, if necessary. Ru.
- the resist composition of the present embodiment can contain other resins, as needed.
- the other resin is not particularly limited.
- novolak resin polyvinyl phenols, polyacrylic acid, polyvinyl alcohol, styrene-maleic anhydride resin, and acrylic acid, vinyl alcohol, or vinyl phenol as a monomer unit And polymers containing these or derivatives thereof.
- the content of the above resin is not particularly limited, and is appropriately adjusted according to the type of the component (A) to be used, but is preferably 30 parts by mass or less, more preferably 100 parts by mass of the component (A).
- the content is 10 parts by mass or less, more preferably 5 parts by mass or less, and particularly preferably 0 parts by mass.
- the resist composition of the present embodiment can form an amorphous film by spin coating, and can be applied to a general semiconductor manufacturing process. Further, depending on the type of developer used, either a positive resist pattern or a negative resist pattern can be made separately.
- the dissolution rate of the amorphous film formed by spin coating the resist composition of this embodiment in a developer at 23 ° C. is preferably 5 ⁇ / sec or less, more preferably 0.05 to 5 ⁇ / sec.
- 0.0005 to 5 ⁇ / sec is more preferable.
- the dissolution rate is 5 ⁇ / sec or less, it is insoluble in a developer and it becomes easy to form a resist.
- the dissolution rate is 0.0005 ⁇ / sec or more, the resolution may be improved.
- the dissolution rate in a developer at 23 ° C. of the amorphous film formed by spin coating the resist composition of the present embodiment is preferably 10 ⁇ / sec or more.
- the dissolution rate is 10 ⁇ / sec or more, it is easily soluble in the developer and more suitable for the resist.
- the dissolution rate is 10 ⁇ / sec or more, the resolution may be improved. It is presumed that this is because the micro surface area of the component (A) dissolves to reduce LER. Moreover, the reduction effect of a defect is recognized.
- the dissolution rate can be determined by immersing the amorphous film in a developer for a predetermined time at 23 ° C., and measuring the film thickness before and after the immersion by a known method such as visual observation, ellipsometer or QCM method.
- the dissolution rate is preferably 10 ⁇ / sec or more. When the dissolution rate is 10 ⁇ / sec or more, it is easily soluble in a developer and more suitable for a resist. In addition, when the dissolution rate is 10 ⁇ / sec or more, the resolution may be improved. It is presumed that this is because the micro surface area of the component (A) dissolves to reduce LER. Moreover, the reduction effect of a defect is recognized.
- the dissolution rate is preferably 5 ⁇ / sec or less, more preferably 0.05 to 5 ⁇ / sec, and still more preferably 0.0005 to 5 ⁇ / sec.
- the dissolution rate is 5 ⁇ / sec or less, it is insoluble in a developer and it becomes easy to form a resist.
- the dissolution rate is 0.0005 ⁇ / sec or more, the resolution may be improved.
- the radiation sensitive composition of the present embodiment comprises at least one substance (component (A)) selected from the group consisting of the film-forming materials of the present embodiment described above, a diazonaphthoquinone photoactive compound (B), and a solvent. And the content of the solvent is 20 to 99% by mass with respect to 100% by mass of the total of the radiation-sensitive composition.
- the component (A) to be contained in the radiation sensitive composition of the present embodiment is used in combination with the diazonaphthoquinone photoactive compound (B) described later, and is g-line, h-line, i-line, KrF excimer laser, ArF excimer laser, extreme It is useful as a substrate for a positive resist, which becomes a compound easily soluble in a developer by irradiation with ultraviolet light, electron beam or X-ray.
- component (A) do not greatly change by irradiation with g-ray, h-ray, i-ray, KrF excimer laser, ArF excimer laser, extreme ultraviolet light, electron beam or X-ray, but diazonaphthoquinone light which is poorly soluble in developer Since the active compound (B) changes to a readily soluble compound, a resist pattern can be formed by the development step.
- the component (A) to be contained in the radiation sensitive composition of the present embodiment is a compound having a relatively low molecular weight, as shown in the above-mentioned formula (1), and therefore the roughness of the obtained resist pattern is very small.
- at least one of R 1 to R 3 is preferably a group containing an iodine atom.
- the radiation sensitive composition of the present embodiment contains the component (A) having a group containing an iodine atom, its absorption ability to radiation such as electron beam, extreme ultraviolet (EUV), X-ray and the like increases. Especially, it is possible to increase the sensitivity.
- the glass transition temperature of the component (A) contained in the radiation sensitive composition of the present embodiment is preferably 100 ° C. or more, more preferably 120 ° C. or more, still more preferably 140 ° C. or more, particularly preferably 150 ° C. or more .
- the upper limit of the glass transition temperature of a component (A) is not specifically limited, For example, it is 400 degreeC.
- the semiconductor lithography process has heat resistance capable of maintaining the pattern shape, and the performance such as high resolution tends to be improved.
- the crystallization calorific value determined by differential scanning calorimetry at the glass transition temperature of the component (A) contained in the radiation sensitive composition of the present embodiment is less than 20 J / g.
- the (crystallization temperature)-(glass transition temperature) is preferably 70 ° C. or more, more preferably 80 ° C. or more, still more preferably 100 ° C. or more, particularly preferably 130 ° C. or more.
- An amorphous film is easily formed by spin-coating the radiation sensitive composition when the crystallization calorific value is less than 20 J / g, or (crystallization temperature)-(glass transition temperature) is in the above range, and The film forming property required for the resist can be maintained for a long time, and the resolution tends to be improved.
- the crystallization calorific value, the crystallization temperature and the glass transition temperature can be determined by differential scanning calorimetry using DSC / TA-50WS manufactured by Shimadzu Corporation. Specifically, about 10 mg of a sample is placed in an aluminum non-sealed container, and the temperature is raised to the melting point or more at a heating rate of 20 ° C./min in a nitrogen gas flow (50 mL / min). After quenching, the temperature is raised again above the melting point at a heating rate of 20 ° C./min in a nitrogen gas stream (30 mL / min). After quenching, the temperature is raised again to 400 ° C.
- the calorific value is determined from the area of the region surrounded by the calorific peak and the baseline, and is defined as the crystallization calorific value.
- Component (A) contained in the radiation sensitive composition of the present embodiment is under normal pressure at 100 ° C. or less, preferably 120 ° C. or less, more preferably 130 ° C. or less, still more preferably 140 ° C. or less, particularly preferably 150 ° C.
- the sublimation property is preferably low.
- the low sublimation property means that in thermogravimetric analysis, the weight loss when held at a predetermined temperature for 10 minutes is 10% or less, preferably 5% or less, more preferably 3% or less, still more preferably 1% or less, particularly preferably Indicates that it is 0.1% or less.
- the low sublimation property can prevent the contamination of the exposure apparatus due to the outgas at the time of exposure. Also, good pattern shape can be obtained with low roughness.
- Component (A) contained in the radiation sensitive composition of this embodiment is propylene glycol monomethyl ether acetate (PGMEA), propylene glycol monomethyl ether (PGME), cyclohexanone (CHN), cyclopentanone (CPN), 2-heptanone 1% by mass or more, preferably 5% by mass, at 23 ° C. in a solvent selected from anisole, butyl acetate, ethyl propionate and ethyl lactate and exhibiting the highest dissolving power to the component (A) % Or more, more preferably 10% by mass or more.
- the diazonaphthoquinone photoactive compound (B) contained in the radiation sensitive composition of the present embodiment is a diazonaphthoquinone substance containing a polymeric and nonpolymeric diazonaphthoquinone photoactive compound, and in general, it is photosensitive in a positive resist composition.
- a color component photosensitive agent
- one or two or more kinds can be arbitrarily selected and used.
- Such photosensitizers are not particularly limited.
- naphthoquinone diazide sulfonic acid chloride, benzoquinone diazide sulfonic acid chloride, etc. are reacted with a low molecular weight compound or polymer compound having a functional group capable of condensation reaction with these acid chlorides.
- the compounds obtained by Here, the functional group that can be condensed with the acid chloride is not particularly limited, and examples thereof include a hydroxyl group and an amino group, and a hydroxyl group is particularly preferable.
- the compound which can be condensed with the acid chloride containing a hydroxyl group is not particularly limited, but, for example, hydroquinone, resorcinol, 2,4-dihydroxybenzophenone, 2,3,4-trihydroxybenzophenone, 2,4,6-trihydroxybenzophenone 2,4,4'-trihydroxybenzophenone, 2,3,4,4'-tetrahydroxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2,2', 3,4,6 ' Hydroxybenzophenones such as 2-pentahydroxybenzophenone, bis (2,4-dihydroxyphenyl) methane, bis (2,3,4-trihydroxyphenyl) methane, hydroxyphenylalkanes such as bis (2,4-dihydroxyphenyl) propane 4,4 ', 3 ", 4" -tetrahydro Ci-3,5,3 ′, 5′-Tetramethyltriphenylmethane, 4,4 ′, 2 ′ ′
- acid chlorides such as naphthoquinone diazide sulfonic acid chloride and benzoquinone diazide sulfonic acid chloride
- 1,2-naphthoquinone diazide-5-sulfonyl chloride, 1,2-naphthoquinone diazide-4-sulfonyl chloride and the like are preferable. It can be mentioned.
- the radiation sensitive composition of the present embodiment is prepared, for example, by dissolving each component in a solvent at the time of use to make a uniform solution, and then filtering it with, for example, a filter with a pore diameter of about 0.2 ⁇ m, if necessary. Preferably.
- the solvent that can be used for the radiation sensitive composition of the present embodiment is not particularly limited, and, for example, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, cyclohexanone, cyclopentanone, 2-heptanone, anisole, butyl acetate Ethyl propionate, and ethyl lactate.
- propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether and cyclohexanone are preferable.
- the solvents may be used alone or in combination of two or more.
- the content of the solvent is 20 to 99% by mass, preferably 50 to 99% by mass, more preferably 60 to 98% by mass, based on 100% by mass of the total of the radiation sensitive composition. Preferably, it is 90 to 98% by mass.
- the content of components (solid components) other than the solvent is 1 to 80 mass%, preferably 1 to 50 mass%, and more preferably, 100 mass% of the total of the radiation sensitive composition. It is 2 to 40% by mass, particularly preferably 2 to 10% by mass.
- the radiation sensitive composition of the present embodiment can form an amorphous film by spin coating, and can be applied to a general semiconductor manufacturing process. Further, depending on the type of developer used, either a positive resist pattern or a negative resist pattern can be made separately.
- the dissolution rate of the amorphous film formed by spin coating the radiation sensitive composition of this embodiment in a developer at 23 ° C. is preferably 5 ⁇ / sec or less, and 0.05 to 5 ⁇ / sec. Is more preferably 0.0005 to 5 ⁇ / sec.
- the dissolution rate is 5 ⁇ / sec or less, it becomes insoluble in a developer and it becomes easy to form a resist.
- the dissolution rate is 0.0005 ⁇ / sec or more, the resolution may be improved.
- the dissolution rate of the amorphous film formed by spin coating the radiation sensitive composition of this embodiment in a developer at 23 ° C. is preferably 10 ⁇ / sec or more.
- the dissolution rate is 10 ⁇ / sec or more, it is easily soluble in the developer and is more suitable for the resist.
- the dissolution rate is 10 ⁇ / sec or more, the resolution may be improved. It is presumed that this is because the micro surface area of the component (A) dissolves to reduce LER. Moreover, the reduction effect of a defect is recognized.
- the dissolution rate can be determined by immersing the amorphous film in the developer for a predetermined time at 23 ° C., and measuring the film thickness before and after the immersion by a known method such as visual observation, ellipsometer or QCM method. .
- the amorphous film formed by spin coating the radiation sensitive composition of the present embodiment is irradiated with radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray, or
- the dissolution rate of the exposed part after heating at 500 ° C. in a developer at 23 ° C. is preferably 10 ⁇ / sec or more, more preferably 10 to 10000 ⁇ / sec, and still more preferably 100 to 1000 ⁇ / sec.
- the dissolution rate is 10 ⁇ / sec or more, it is easily soluble in a developer and more suitable for a resist.
- the dissolution rate is 10000 ⁇ / sec or less, the resolution may be improved. It is presumed that this is because the micro surface area of the component (A) dissolves to reduce LER. Moreover, the reduction effect of a defect is recognized.
- the amorphous film formed by spin-coating the radiation sensitive composition of the present embodiment is irradiated with radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray, or
- the dissolution rate of the exposed part after heating at 500 ° C. to the developer at 23 ° C. is preferably 5 ⁇ / sec or less, more preferably 0.05 to 5 ⁇ / sec, and still more preferably 0.0005 to 5 ⁇ / sec .
- the dissolution rate is 5 ⁇ / sec or less, it becomes insoluble in a developer and it becomes easy to form a resist.
- the dissolution rate is 0.0005 ⁇ / sec or more, the resolution may be improved.
- the content of the component (A) may be any amount such as total mass of solid component (component (A), diazonaphthoquinone photoactive compound (B) and other components (D), etc.) Preferably 1 to 99% by mass, more preferably 5 to 95% by mass, still more preferably 10 to 90% by mass, particularly preferably 25 to 75% by mass with respect to the total of the solid components %.
- the radiation sensitive composition of the present embodiment tends to be able to obtain a pattern with high sensitivity and small roughness.
- the content of the diazonaphthoquinone photoactive compound (B) is preferably 1 to 99% by mass, more preferably 5 to 95% by mass, based on the total mass of the solid components. More preferably, it is 10 to 90% by mass, particularly preferably 25 to 75% by mass.
- the radiation sensitive composition of the present embodiment tends to be able to obtain a high sensitivity and a small pattern of roughness.
- the component other than the component (A) and the diazonaphthoquinone photoactive compound (B) if necessary, the above-mentioned acid generator, acid crosslinking agent, acid diffusion control agent, One or more kinds of various additives such as a dissolution accelerator, a dissolution controller, a sensitizer, a surfactant, an organic carboxylic acid or an oxo acid of phosphorus or a derivative thereof can be added.
- the other component (D) may be referred to as "optional component (D)".
- Content ratio of component (A), diazonaphthoquinone photoactive compound (B), and other optional component (D) which may optionally be contained in the radiation sensitive composition ((A) / (B) / ( D)) is preferably 1 to 99% by mass / 99 to 1% by mass / 0 to 98% by mass, more preferably 5 to 95% by mass, based on 100% by mass of the solid content of the radiation sensitive composition / 95 to 5% by mass / 0 to 49% by mass, more preferably 10 to 90% by mass / 90 to 10% by mass / 0 to 10% by mass, still more preferably 20 to 80% by mass / 80 to It is 20% by mass / 0-5% by mass, particularly preferably 25-75% by mass / 75-25% by mass / 0% by mass.
- the compounding ratio of each component is selected from each range so that the sum total becomes 100 mass%.
- the radiation sensitive composition of the present embodiment tends to be excellent in performance such as sensitivity, resolution, etc. in addition to roughness when the blending ratio of each component is in the above range.
- the radiation sensitive composition of this embodiment can contain other resin as needed.
- the resin is not particularly limited, and novolak resin, polyvinyl phenols, polyacrylic acid, polyvinyl alcohol, styrene-maleic anhydride resin, and a polymer containing acrylic acid, vinyl alcohol or vinyl phenol as a monomer unit or These derivatives are mentioned.
- the compounding quantity of these resin is suitably adjusted according to the kind of component (A) to be used, 30 mass parts or less are preferable with respect to 100 mass parts of component (A), More preferably, it is 10 mass parts or less More preferably, it is 5 parts by mass or less, particularly preferably 0 parts by mass.
- the method for producing an amorphous film of the present embodiment includes the step of forming an amorphous film on a substrate using the above-mentioned radiation sensitive composition.
- the method of forming a resist pattern using the radiation sensitive composition of the present embodiment comprises the steps of forming a resist film on a substrate using the above radiation sensitive composition, and forming at least a part of the formed resist film. And a step of developing the exposed resist film to form a resist pattern.
- it can carry out as the operation similar to the resist pattern formation method using the following resist composition.
- the method of forming a resist pattern using the resist composition of the present embodiment includes the steps of forming a resist film on a substrate using the resist composition of the present embodiment described above, and at least a part of the formed resist film. And a step of developing the exposed resist film to form a resist pattern.
- the resist pattern in the present embodiment can also be formed as an upper layer resist in a multilayer process.
- the method for forming a resist pattern is not particularly limited, and examples thereof include the following methods.
- a resist film is formed by applying the resist composition of the present embodiment on a conventionally known substrate by an application means such as spin coating, cast application, roll application and the like.
- the conventionally known substrate is not particularly limited.
- a substrate for an electronic component, a substrate on which a predetermined wiring pattern is formed, and the like can be exemplified. More specifically, a silicon wafer, a metal substrate such as copper, chromium, iron, aluminum or the like, a glass substrate, etc. may be mentioned.
- Examples of the material of the wiring pattern include copper, aluminum, nickel, gold and the like.
- inorganic and / or organic films may be provided on the aforementioned substrate.
- inorganic films include inorganic antireflective films (inorganic BARCs).
- organic antireflective film (organic BARC) may be mentioned as the organic film.
- the substrate may be subjected to surface treatment with hexamethylene disilazane or the like.
- the substrate coated with the resist composition is heated.
- the heating conditions vary depending on the composition of the resist composition and the like, but it is preferably 20 to 250 ° C., more preferably 20 to 150 ° C. It is preferable because the adhesion of the resist to the substrate may be improved by heating.
- the resist film is exposed to a desired pattern by any radiation selected from the group consisting of visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet (EUV), X-ray, and ion beam.
- the exposure conditions and the like are appropriately selected according to the composition and the like of the resist composition. In the present embodiment, in order to stably form a fine pattern of high accuracy in exposure, it is preferable to heat after radiation irradiation.
- the exposed resist film is developed with a developer to form a predetermined resist pattern.
- a solvent having a solubility parameter (SP value) close to that of the component (A) to be used as the developer and ketone solvents, ester solvents, alcohol solvents, amide solvents, ether solvents And polar solvents such as, hydrocarbon solvents or alkaline aqueous solutions can be used.
- SP value solubility parameter
- a positive resist pattern or a negative resist pattern can be made separately depending on the type of developer, but generally, polar solvents such as ketone solvents, ester solvents, alcohol solvents, amide solvents, ether solvents and the like In the case of a hydrocarbon-based solvent, a negative resist pattern is obtained, and in the case of an alkaline aqueous solution, a positive resist pattern is obtained.
- polar solvents such as ketone solvents, ester solvents, alcohol solvents, amide solvents, ether solvents and the like
- the water content of the whole developer is less than 70% by mass, preferably less than 50% by mass, and more preferably less than 30% by mass. It is more preferable that the content be less than 10% by mass, and it is particularly preferable that the composition contains substantially no water. That is, the content of the organic solvent in the developer is 30% by mass to 100% by mass, preferably 50% by mass to 100% by mass, and preferably 70% by mass to 100%, with respect to the total amount of the developer. It is more preferable that it is mass% or less, It is further more preferable that it is 90 to 100 mass%, It is especially preferable that it is 95 to 100 mass%.
- the developing solution contains at least one solvent selected from ketone solvents, ester solvents, alcohol solvents, amide solvents and ether solvents, and the resolution and roughness of the resist pattern, etc. It is preferable because it tends to improve the resist performance of
- the vapor pressure of the developer is preferably 5 kPa or less, more preferably 3 kPa or less, and particularly preferably 2 kPa or less.
- Specific examples of the developer having a vapor pressure of 5 kPa or less include those described in International Publication WO 2013/024778.
- Specific examples of the developer having a vapor pressure of 2 kPa or less, which is a particularly preferable range, include those described in International Publication WO 2013/024778.
- the surfactant is not particularly limited, but for example, ionic or nonionic fluorine-based and / or silicon-based surfactants can be used.
- fluorine and / or silicon surfactants for example, JP-A-62-36663, JP-A-61-226746, JP-A-61-226745, JP-A-62-170950.
- JP-A-5360692, JP-A-5529881, JP-A-5296330, JP-A-5436098, JP-A-5576143, JP-A-5294511 and JP-A-5824451 can be cited.
- it is a nonionic surfactant.
- the nonionic surfactant is not particularly limited, but a fluorine-based surfactant or a silicon-based surfactant is more preferable.
- the amount of surfactant used is usually 0.001 to 5% by mass, preferably 0.005 to 2% by mass, and more preferably 0.01 to 0.5% by mass, based on the total amount of the developer.
- a developing method for example, a method of immersing the substrate in a bath filled with a developer for a certain time (dip method), a method of developing by standing up the developer on the substrate surface by surface tension and standing for a certain time (paddle Method), a method of spraying a developer on the substrate surface (spray method), a method of continuously coating a developer while scanning a developer coating nozzle at a constant speed on a substrate rotating at a constant speed (dynamic dispense method Etc. can be applied.
- the time for developing the pattern is not particularly limited, but is preferably 10 seconds to 90 seconds.
- the rinse solution used in the rinse step after development is not particularly limited as long as it does not dissolve the resist pattern cured by crosslinking, and a solution containing a common organic solvent or water can be used.
- a rinse solution it is preferable to use a rinse solution containing at least one organic solvent selected from hydrocarbon solvents, ketone solvents, ester solvents, alcohol solvents, amide solvents and ether solvents.
- the development is followed by a washing step using a rinse solution containing at least one organic solvent selected from the group consisting of ketone solvents, ester solvents, alcohol solvents, and amide solvents.
- the development is followed by a washing step using a rinse solution containing an alcohol solvent or an ester solvent.
- the development is followed by a washing step using a rinse solution containing a monohydric alcohol.
- development is followed by a step of washing with a rinse solution containing a monohydric alcohol having 5 or more carbon atoms.
- the time to rinse the pattern is not particularly limited, but is preferably 10 seconds to 90 seconds.
- the monohydric alcohol used in the rinsing step after development is not particularly limited, and examples thereof include those described in International Publication WO 2013/024778.
- Each of the components described above may be mixed, or may be mixed with an organic solvent other than the above.
- the water content in the rinse solution is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably 3% by mass or less. By setting the water content to 10% by mass or less, better developing characteristics tend to be obtained.
- the vapor pressure of the rinse solution used after development is preferably 0.05 kPa or more and 5 kPa or less at 20 ° C., more preferably 0.1 kPa or more and 5 kPa or less, and still more preferably 0.12 kPa or more and 3 kPa or less.
- An appropriate amount of surfactant may be added to the rinse solution.
- the wafer subjected to development is washed using the above-described rinse solution containing an organic solvent.
- the method of the cleaning process is not particularly limited, for example, a method of continuously applying a rinse liquid onto a substrate rotating at a constant speed (rotation coating method), and immersing the substrate in a bath filled with the rinse liquid for a predetermined time
- a method (dip method), a method of spraying a rinse solution on the substrate surface (spray method), etc. can be applied, among which the cleaning treatment is carried out by the spin coating method, and after cleaning, the substrate is rotated at a rotational speed of 2000 rpm to 4000 rpm.
- the rinse solution is preferably removed from the substrate.
- the patterned wiring board can be obtained by etching.
- the etching can be performed by a known method such as dry etching using plasma gas and wet etching using an alkali solution, a cupric chloride solution, a ferric chloride solution or the like.
- Plating can also be performed after forming a resist pattern.
- Examples of the plating method include copper plating, solder plating, nickel plating, gold plating and the like.
- the remaining resist pattern after etching can be peeled off with an organic solvent.
- the organic solvent include PGMEA (propylene glycol monomethyl ether acetate), PGME (propylene glycol monomethyl ether), EL (ethyl lactate) and the like.
- PGMEA propylene glycol monomethyl ether acetate
- PGME propylene glycol monomethyl ether
- EL ethyl lactate
- peeling method an immersion method, a spray system, etc. are mentioned, for example.
- the wiring substrate on which the resist pattern is formed may be a multilayer wiring substrate, and may have a small diameter through hole.
- the wiring substrate obtained in the present embodiment can also be formed by a method of depositing a metal in vacuum after forming a resist pattern and thereafter dissolving the resist pattern with a solution, that is, a lift-off method.
- the underlayer film forming material for lithography of the present embodiment contains one or more selected from the group consisting of the film forming materials of the present embodiment described above.
- the content of the component (A) contained in the underlayer film forming material for lithography of the present embodiment is preferably 1 to 100% by mass in the underlayer film forming material for lithography from the viewpoint of coatability and quality stability. 10 to 100% by mass is more preferable, 50 to 100% by mass is more preferable, and 100% by mass is particularly preferable.
- the underlayer film forming material for lithography of the present embodiment can be applied to a wet process, and is excellent in heat resistance and etching resistance. Furthermore, since the triazine-based compound described above is used for the underlayer film forming material for lithography of the present embodiment, the degradation of the film at the time of high temperature baking is suppressed, and the underlayer film excellent in etching resistance to oxygen plasma etching and the like is formed. can do. Furthermore, since the underlayer film forming material for lithography of the present embodiment is also excellent in adhesion to the resist layer, an excellent resist pattern can be obtained. In addition, the underlayer film forming material for lithography of the present embodiment may contain the already known underlayer film forming material for lithography and the like within the range where the effects of the present invention are not impaired.
- composition for forming a lower layer film for lithography contains the above-mentioned material for forming a lower layer film for lithography and a solvent.
- solvent As the solvent used in the composition for forming a lower layer film for lithography of the present embodiment, known solvents can be appropriately used as long as the component (A) mentioned above is at least dissolved.
- solvents may be used alone or in combination of two or more.
- cyclohexanone, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, ethyl lactate, methyl hydroxyisobutyrate and anisole are particularly preferable from the viewpoint of safety.
- the content of the solvent is not particularly limited, but is preferably 100 to 10,000 parts by mass with respect to 100 parts by mass of the lower layer film-forming material from the viewpoint of solubility and film formation, 200 to 5,
- the content is more preferably 000 parts by mass, and further preferably 200 to 1,000 parts by mass.
- the composition for forming a lower layer film for lithography of the present embodiment may contain a crosslinking agent as necessary, from the viewpoint of suppressing intermixing and the like. Although it does not specifically limit as a crosslinking agent which can be used by this embodiment, For example, the thing of international publication WO2013 / 024779 can be used. In the present embodiment, the crosslinking agent may be used alone or in combination of two or more.
- the content of the crosslinking agent in the composition for forming a lower layer film for lithography of the present embodiment is not particularly limited, but is preferably 5 to 50 parts by mass, and more preferably 100 parts by mass of the lower layer film forming material. Is 10 to 40 parts by mass.
- the composition for forming a lower layer film for lithography of the present embodiment may contain an acid generator as necessary, from the viewpoint of further promoting a crosslinking reaction by heat.
- an acid generator although what generate
- the acid generator is not particularly limited, and, for example, those described in International Publication WO 2013/024779 can be used.
- an acid generator can be used individually or in combination of 2 or more types.
- the content of the acid generator is not particularly limited, but preferably 0.1 to 50 parts by mass with respect to 100 parts by mass of the lower layer film forming material And more preferably 0.5 to 40 parts by mass.
- composition for forming a lower layer film for lithography of the present embodiment may contain a basic compound from the viewpoint of, for example, improving storage stability.
- the basic compound plays the role of a quencher for the acid to prevent the acid generated from the acid generator in a trace amount from proceeding with the crosslinking reaction.
- basic compounds for example, primary, secondary or tertiary aliphatic amines, mixed amines, aromatic amines, heterocyclic amines, nitrogen-containing compounds having a carboxy group,
- the nitrogen-containing compound having a sulfonyl group, the nitrogen-containing compound having a hydroxyl group, the nitrogen-containing compound having a hydroxyphenyl group, the alcoholic nitrogen-containing compound, the amide derivative, the imide derivative and the like can be mentioned, but not limited thereto.
- the basic compound used in the present embodiment is not particularly limited, and, for example, those described in International Publication WO 2013/024779 can be used. In the present embodiment, the basic compounds can be used alone or in combination of two or more.
- the content of the basic compound in the composition for forming a lower layer film for lithography of the present embodiment is not particularly limited, but is preferably 0.001 to 2 parts by mass with respect to 100 parts by mass of the lower layer film forming material And more preferably 0.01 to 1 part by mass.
- the storage stability tends to be enhanced without excessively impairing the crosslinking reaction.
- the composition for lower-layer film formation for lithography of this embodiment may contain other resin and / or compound in order to provide thermosetting and to control the absorbance.
- other resins and / or compounds naphthol resin, xylene resin naphthol modified resin, phenol modified resin of naphthalene resin, polyhydroxystyrene, dicyclopentadiene resin, (meth) acrylate, dimethacrylate, trimethacrylate, tetramer Resin containing naphthalene ring such as methacrylate, vinyl naphthalene and polyacenaphthylene, biphenyl ring such as phenanthrene quinone and fluorene, heterocycle containing hetero atom such as thiophene and indene, resin not containing aromatic ring; rosin based resin Examples thereof include, but not particularly limited to, resins or compounds containing an alicyclic structure such as cyclodextrin,
- the method for forming a lower layer film for lithography of the present embodiment includes the step of forming a lower layer film on a substrate using the composition for forming a lower layer film for lithography of the present embodiment.
- the method for forming a resist pattern using the composition for forming an underlayer film for lithography according to this embodiment is a step of forming an underlayer film on a substrate using the composition for forming an underlayer film for lithography according to this embodiment (A-1)
- the circuit pattern forming method using the composition for forming a lower layer film for lithography of the present embodiment is a step of forming the lower layer film on a substrate using the composition for forming a lower layer film for lithography of the present embodiment (B-1) And (b-2) forming an intermediate layer film using a resist intermediate layer film material containing silicon atoms on the lower layer film, and at least one photoresist layer on the intermediate layer film.
- the lower layer film for lithography of the present embodiment is not particularly limited as long as it is formed from the composition for forming a lower layer film for lithography of the present embodiment, and known methods can be applied. For example, after the composition for forming an underlayer film for lithography of the present embodiment is applied on a substrate by a known coating method such as spin coating or screen printing, or the like, the organic solvent is removed by volatilization or the like. , The lower layer film can be formed.
- 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 also not particularly limited, but is preferably in 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 usually, it is preferably about 30 to 20,000 nm, and more preferably 50 to 15,000 nm. Is preferred.
- a silicon-containing resist layer or a single layer resist composed of ordinary hydrocarbon is formed thereon in the case of a two-layer process, a silicon-containing intermediate layer is further formed thereon in the case of a three-layer process, It is preferable to produce a single-layer resist layer not containing silicon.
- known photoresist materials can be used as the photoresist material for forming the resist layer.
- a silicon-containing resist layer or a single-layer resist made of ordinary hydrocarbon can be formed on the lower layer film.
- a silicon-containing intermediate layer can be formed on the lower layer film, and a single-layer resist layer containing no silicon can be formed on the silicon-containing intermediate layer.
- the photoresist material for forming the resist layer can be appropriately selected from known materials and used, and is not particularly limited.
- a silicon-containing resist material for a two-layer process a silicon atom-containing polymer such as a polysilsesquioxane derivative or a vinylsilane derivative is used as a base polymer from the viewpoint of oxygen gas etching resistance, and an organic solvent, an acid generator, A positive photoresist material containing a basic compound and the like as needed is preferably used.
- the silicon atom-containing polymer known polymers used in this type of resist material can be used.
- a polysilsesquioxane based interlayer is preferably used as the silicon-containing interlayer for the three layer process.
- the reflection can be effectively suppressed by making the intermediate layer effective as an antireflective film.
- the k value tends to be high and the substrate reflection tends to be high. Can make the substrate reflection 0.5% or less.
- Such an intermediate layer having an antireflective effect is not limited to the following, but for example for exposure at 193 nm, an acid or heat cross-linkable polysil to which a light absorbing group having a phenyl group or a silicon-silicon bond is introduced Sesquioxane is preferably used.
- an intermediate layer formed by a chemical vapor deposition (CVD) method can also be used.
- a SiON film is known, although not limited thereto.
- formation of the intermediate layer by a wet process such as spin coating or screen printing is more convenient and cost-effective than the CVD method.
- the upper layer resist in the three-layer process may be either positive or negative and may be the same as a commonly used single layer resist.
- the lower layer film in the present embodiment can also be used as a general antireflective film for a single layer resist or a base material for suppressing pattern collapse.
- the lower layer film of the present embodiment is excellent in etching resistance for base processing, so that a function as a hard mask for base processing can also be expected.
- the resist layer is formed of the photoresist material
- a wet process such as spin coating or screen printing is preferably used as in the case of forming the lower layer film.
- pre-baking is usually carried out, but it is preferable to carry out this pre-baking at 80 to 180 ° C. for 10 to 300 seconds.
- exposure is performed according to a conventional method, and post-exposure baking (PEB) and development are performed, whereby a resist pattern can be obtained.
- PEB post-exposure baking
- the thickness of the resist film is not particularly limited, in general, it is preferably 30 to 500 nm, and 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 lasers, soft X-rays of 3 to 20 nm, electron beams, X-rays and the like can be mentioned.
- the resist pattern formed by the above-described method has pattern collapse suppressed by the lower layer film in the present embodiment. Therefore, by using the lower layer film in the present embodiment, a finer pattern can be obtained, and the amount of exposure necessary to obtain the resist pattern can be reduced.
- gas etching is preferably used as the etching of the underlayer film in the two-layer process.
- gas etching etching using oxygen gas is preferable.
- oxygen gas it is also possible to add an inert gas such as He or Ar, or CO, CO 2 , NH 3 , SO 2 , N 2 , NO 2 or H 2 gas.
- gas etching can be performed using only CO, CO 2 , NH 3 , N 2 , NO 2, and H 2 gas without using oxygen gas.
- the latter gas is preferably used for sidewall protection for preventing undercut of the pattern sidewall.
- gas etching is also preferably used in etching the intermediate layer in the three-layer process.
- gas etching the same one as described in the above two-layer process is applicable.
- the processing of the intermediate layer in the three-layer process is preferably performed using a fluorocarbon-based gas with the resist pattern as a mask.
- the lower layer film can be processed by, for example, performing oxygen gas etching using the intermediate layer pattern as a mask.
- a silicon oxide film, a silicon nitride film, and a silicon oxynitride film are formed by a CVD method, an ALD method, or the like.
- the method of forming the nitride film is not limited to the following, but, for example, the methods described in JP-A-2002-334869 (Patent Document 6) and WO 2004/066377 (Patent Document 7) can be used.
- a photoresist film can be formed directly on such an interlayer film, an organic antireflective film (BARC) is formed by spin coating on the interlayer film, and a photoresist film is formed thereon. You may
- an intermediate layer based on polysilsesquioxane is also preferably used.
- the specific material of the polysilsesquioxane-based intermediate layer is not limited to the following, but is described, for example, in Japanese Patent Application Laid-Open Nos. 2007-226170 (Patent Document 8) and 2007-226204 (Patent Document 9). Can be used.
- the etching of the next substrate can also be carried out by a conventional method, for example, etching using a fluorocarbon gas as the main component if the substrate is SiO 2 or SiN, chlorine or bromine if it is p-Si, Al or W Gas-based etching can be performed.
- a fluorocarbon gas as the main component if the substrate is SiO 2 or SiN
- chlorine or bromine if it is p-Si, Al or W Gas-based etching can be performed.
- the silicon-containing resist layer or the silicon-containing intermediate layer is separately peeled off, and in general, the dry etching peeling by fluorocarbon-based gas is performed after processing the substrate. .
- the lower layer film in the present embodiment is characterized in that the etching resistance of the substrate is excellent.
- the substrate may be appropriately selected and used those known, but are not limited to, include Si, ⁇ -Si, p- Si, SiO 2, SiN, SiON, W, TiN, Al and the like .
- the substrate may be a laminate having a film to be processed (substrate to be processed) on a base material (support).
- various low-k films such as Si, SiO 2 , SiON, SiN, p-Si, ⁇ -Si, W, W-Si, Al, Cu, Al-Si and the stoppers thereof A film etc.
- the thickness of the substrate to be processed or the film to be processed is not particularly limited, but in general, it is preferably about 50 to 1,000,000 nm, and more preferably 75 to 500,000 nm.
- the permanent film for resists which can also produce the permanent film for resists using the said resist composition and which apply
- Specific examples of the permanent film are not limited to the following, but in the case of semiconductor device, package adhesion layers such as solder resist, package material, underfill material, circuit element, adhesive layer of integrated circuit element and circuit board, thin display connection In the above, a thin film transistor protective film, a liquid crystal color filter protective film, a black matrix, a spacer and the like can be mentioned.
- the permanent film made of the resist composition is excellent in heat resistance and moisture resistance and also has a very excellent advantage that the contamination by the sublimation component is small.
- the material has high sensitivity, high heat resistance, and moisture absorption reliability with little deterioration in image quality due to important contamination.
- the resist composition When the resist composition is used as a permanent film for resist, in addition to the curing agent, if necessary, various additives such as other resins, surfactants, dyes, fillers, crosslinking agents, dissolution accelerators, etc. In addition, by dissolving in an organic solvent, it can be made a permanent film application composition for a resist.
- the film-forming composition for lithography and the resist composition can be prepared by blending the components described above and mixing them using a stirrer or the like.
- the composition for a resist lower layer film or the resist composition contains a filler or a pigment, it can be dispersed or mixed and adjusted using a disperser such as a dissolver, a homogenizer, or a 3-roll mill.
- the method for purifying a triazine compound represented by the above formula (1) comprises the steps of dissolving the triazine compound in a solvent to obtain a solution (S), the obtained solution (S) and an acidic aqueous solution And a first extraction step of contacting and extracting impurities in the compound, and a solvent used in the step of obtaining the solution (S) includes an organic solvent immiscible with water.
- the content of various metals that can be contained in the above-described triazine compound can be reduced.
- the triazine compound is dissolved in an organic solvent immiscible with water to obtain a solution (S), and the solution (S) is further brought into contact with an acidic aqueous solution. Extraction processing can be performed. In this way, after the metal component contained in the solution (S) containing the triazine compound of the present embodiment is transferred to the aqueous phase, the organic phase and the aqueous phase are separated to reduce the metal content, this embodiment It is possible to obtain triazine compounds in the form.
- the triazine compound of this embodiment used in the purification method of this embodiment may be used alone, or two or more may be mixed.
- the triazine compound of the present embodiment may contain various surfactants, various crosslinking agents, various acid generators, various stabilizers and the like.
- the water-immiscible solvent used in the purification method of this embodiment is not particularly limited, but an organic solvent that can be safely applied to the semiconductor manufacturing process is preferable, and specifically, the solubility in water at room temperature is 30 %, More preferably less than 20% and particularly preferably less than 10%.
- the amount of the organic solvent used is preferably 1 to 100 times by mass with respect to the triazine compound of the present embodiment.
- water-immiscible solvent examples include, but are not limited to, those described in, for example, International Publication WO 2015/080240.
- toluene, 2-heptanone, cyclohexanone, cyclopentanone, methyl isobutyl ketone, propylene glycol monomethyl ether acetate, ethyl acetate and the like are preferable, and methyl isobutyl ketone, ethyl acetate, cyclohexanone and propylene glycol monomethyl ether acetate are more preferable.
- Methyl isobutyl ketone and ethyl acetate are more preferred.
- the load in the step of industrially removing the solvent or removing it by drying can be reduced.
- These solvents can be used alone or in combination of two or more.
- the acidic aqueous solution used in the purification method of the present embodiment is not particularly limited, and examples thereof include those described in WO 2015/080240. These acidic aqueous solutions can be used alone or in combination of two or more. Among these acidic aqueous solutions, one or more mineral acid aqueous solutions selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid, or acetic acid, propionic acid, oxalic acid, malonic acid, succinic acid, fumaric acid, maleic acid, It is preferably an aqueous solution of one or more organic acids selected from the group consisting of tartaric acid, citric acid, methanesulfonic acid, phenolsulfonic acid, p-toluenesulfonic acid and trifluoroacetic acid, such as sulfuric acid, nitric acid, acetic acid, oxalic acid, An aqueous solution of carboxylic acid such as tartaric
- polyvalent carboxylic acids such as boric acid, tartaric acid and citric acid tend to be able to remove metals more effectively because they coordinate to metal ions and a chelating effect occurs.
- water with small metal content for example, ion-exchange water etc., according to the objective of the purification method of this embodiment as water used here.
- the pH of the acidic aqueous solution used in the purification method of the present embodiment is not particularly limited, but it is preferable to adjust the acidity of the aqueous solution in consideration of the influence on the triazine compound of the present embodiment.
- the pH range is about 0-5, preferably about pH 0-3.
- the use amount of the acidic aqueous solution used in the purification method of the present embodiment is not particularly limited, but from the viewpoint of reducing the number of extractions for metal removal and the viewpoint of securing operability considering the entire liquid volume, It is preferable to adjust the amount used. From the above viewpoint, the use amount of the acidic aqueous solution is preferably 10 to 200 parts by mass, and more preferably 20 to 100 parts by mass with respect to 100 parts by mass of the solution (S).
- the acidic aqueous solution as described above is brought into contact with the triazine compound of the present embodiment and the solution (S) containing a solvent immiscible with water to obtain the solution (S).
- the metal component can be extracted from the triazine compound in it.
- the solution (S) preferably further contains an organic solvent miscible with water.
- the organic solvent miscible with water is included, the preparation amount of the triazine compound of the present embodiment can be increased, and the liquid separation property is improved, and the purification tends to be performed with high pot efficiency.
- the method of adding the water-miscible organic solvent is not particularly limited. For example, it may be added to a solution containing an organic solvent in advance, may be added to water or an acidic aqueous solution in advance, or may be added after contacting a solution containing an organic solvent with water or an acidic aqueous solution. Among these, the method of adding to a solution containing an organic solvent in advance is preferable in terms of the operability of operation and the ease of management of the preparation amount.
- the organic solvent miscible with water used in the purification method of the present embodiment is not particularly limited, but an organic solvent that can be safely applied to the semiconductor manufacturing process is preferable.
- the use amount of the organic solvent miscible with water is not particularly limited as long as the solution phase and the water phase are separated, but 0.1 to 100 mass with respect to the triazine compound and / or resin of the present embodiment. It is preferably double, more preferably 0.1 to 50 times by mass, still more preferably 0.1 to 20 times by mass.
- water-miscible organic solvent used in the purification method of the present embodiment include, but are not limited to, those described in WO 2015/080240.
- N-methyl pyrrolidone, propylene glycol monomethyl ether and the like are preferable, and N-methyl pyrrolidone and propylene glycol monomethyl ether are more preferable.
- These solvents can be used alone or in combination of two or more.
- the temperature at which the extraction treatment is carried out is usually 20 to 90 ° C., preferably 30 to 80 ° C.
- the extraction operation is performed, for example, by allowing the mixture to be well mixed by stirring or the like and then leaving it to stand.
- the metal component contained in the solution containing the triazine compound of the present embodiment and the organic solvent is transferred to the aqueous phase.
- the acidity of the solution is lowered by this operation, and the deterioration of the triazine compound of the present embodiment can be suppressed.
- the mixed solution is separated into a solution phase containing the triazine compound of the present embodiment and a solvent and an aqueous phase upon standing, so that the solution phase containing the triazine compound of the present embodiment and the solvent by decantation etc. to recover.
- the time for standing is not particularly limited, but it is preferable to adjust the time for standing from the viewpoint of improving the separation of the solution phase containing the solvent and the aqueous phase.
- the standing time is 1 minute or more, preferably 10 minutes or more, and more preferably 30 minutes or more.
- the extraction process may be performed only once, it is also effective to repeat the operation of mixing, leaving, and separating plural times.
- the solution phase containing the triazine compound is further brought into contact with water to extract impurities in the triazine compound (second extraction step). It is preferable to include. Specifically, for example, after performing the extraction process using an acidic aqueous solution, the solution phase containing the triazine compound and the solvent of the present embodiment extracted and recovered from the aqueous solution is further extracted with water It is preferable to use the The extraction process with water is not particularly limited. For example, the solution phase and water may be mixed well by stirring or the like, and then the obtained mixed solution may be allowed to stand.
- the mixed solution after standing is separated into a solution phase containing the triazine compound of the present embodiment and a solvent, and an aqueous phase.
- a solution phase containing the triazine compound of the present embodiment and the solvent by decantation etc. Can be recovered.
- the water used here is water with small metal content, for example, ion exchange water etc., in accordance with the purpose of this embodiment.
- the extraction process may be performed only once, it is also effective to repeat the operations of mixing, standing, and separating several times.
- conditions such as the ratio of use of the both and temperature, time, and the like in the extraction process are not particularly limited, but may be the same as in the case of the above-described contact process with the acidic aqueous solution.
- the water that may be mixed into the solution containing the triazine compound of the present embodiment and the solvent thus obtained can be easily removed by an operation such as vacuum distillation. Further, if necessary, a solvent can be added to the above solution to adjust the concentration of the triazine compound of this embodiment to an arbitrary concentration.
- the method for isolating the triazine compound of this embodiment from the solution containing the triazine compound of this embodiment and the solvent of the present embodiment is not particularly limited, and removal under reduced pressure, separation by reprecipitation, a combination thereof, etc. Can be carried out by known methods. If necessary, known processing such as concentration operation, filtration operation, centrifugation operation, drying operation can be further performed.
- Example 1 A triazine compound having a structure represented by the following formula (LA-F70 manufactured by ADEKA Co., Ltd.) alone was used as a material for film formation for lithography.
- thermogravimetry the heat reduction amount at 400 ° C. of the obtained material for forming a lithographic film was less than 10% (Evaluation A). Moreover, as a result of evaluating the solubility in OX, it was 10% by mass or more and less than 15% by mass (Evaluation B), and the obtained material for forming a lithographic film was evaluated as having sufficient solubility. 90 parts by mass of OX as a solvent was added to 10 parts by mass of the material for forming a lithographic film, and stirred at room temperature for at least 3 hours or more with a stirrer to prepare a film-forming composition for lithography.
- Example 2 A triazine compound having a structure represented by the following formula (TINUVIN 460 manufactured by BASF Corp.) alone was used as a material for film formation for lithography.
- thermogravimetry the heat reduction amount at 400 ° C. of the obtained material for forming a lithographic film was 10% to 25% (Evaluation B). Moreover, as a result of evaluating the solubility in OX, it was 15% by mass or more (Evaluation A), and the obtained material for forming a lithographic film was evaluated as having excellent solubility. 90 parts by mass of OX as a solvent was added to 10 parts by mass of the material for forming a lithographic film, and stirred at room temperature for at least 3 hours or more with a stirrer to prepare a film-forming composition for lithography.
- Comparative Example 1 A four-necked flask with an inner volume of 10 L capable of removing bottom and equipped with a Dimroth condenser, a thermometer and a stirrer was prepared.
- this four-necked flask 1.09 kg of 1,5-dimethylnaphthalene (7 mol, manufactured by Mitsubishi Gas Chemical Co., Ltd.), 2.1 kg of a 40% by mass formalin aqueous solution (28 mol as formaldehyde, Mitsubishi Gas Chemical (stock ) And 98 mass% sulfuric acid (Kanto Chemical Co., Ltd. product) were charged and reacted for 7 hours under reflux at 100 ° C. under normal pressure.
- ethylbenzene (reagent special grade, manufactured by Wako Pure Chemical Industries, Ltd.) as a dilution solvent was added to the reaction solution, and after standing, the lower aqueous phase was removed. Further, neutralization and washing with water were performed, and ethylbenzene and unreacted 1,5-dimethylnaphthalene were distilled off under reduced pressure to obtain 1.25 kg of a light brown solid dimethylnaphthalene formaldehyde resin.
- the molecular weight of the obtained dimethyl naphthalene formaldehyde was number average molecular weight (Mn): 562, weight average molecular weight (Mw): 1168, and dispersion degree (Mw / Mn): 2.08.
- a 0.5 L four-necked flask equipped with a Dimroth condenser, a thermometer and a stirring blade was prepared.
- 100 g (0.51 mol) of dimethyl naphthalene formaldehyde resin obtained as described above and 0.05 g of para-toluenesulfonic acid are charged under a nitrogen stream, and the temperature is raised to 190 ° C. 2 After heating for a while, it was stirred. Thereafter, 52.0 g (0.36 mol) of 1-naphthol was further added, and the temperature was further raised to 220 ° C. for reaction for 2 hours.
- the solvent was diluted, neutralized and washed with water, and the solvent was removed under reduced pressure to obtain 126.1 g of a black-brown solid modified resin (CR-1).
- the obtained resin (CR-1) was Mn: 885, Mw: 2220, Mw / Mn: 4.17.
- TG thermogravimetry
- the heat reduction amount at 400 ° C. of the obtained resin was more than 25% (Evaluation C). Therefore, it was evaluated that application to high temperature baking was difficult.
- As a result of evaluating the solubility in OX it was 15% by mass or more (Evaluation A), and was evaluated as having excellent solubility.
- Mn, Mw, and Mw / Mn it measured by performing gel permeation chromatography (GPC) analysis on condition of the following, and calculating
- a resist composition was prepared using the above-mentioned film-forming material and having the formulation shown in Table 2. Among the components of the resist composition in Table 2, the following were used as the acid generator (C), the acid diffusion controller (E) and the solvent.
- Solvent S-1: Propylene glycol monomethyl ether (Tokyo Chemical Industry Co., Ltd.)
- the uniform resist composition was spin coated on a clean silicon wafer and then pre-exposure baked (PB) in an oven at 110 ° C. to form a 60 nm thick resist film.
- the obtained resist film was irradiated with an electron beam of 1: 1 line and space setting at 80 nm intervals using an electron beam lithography system (ELS-7500, manufactured by Elionix Inc.). After the irradiation, the resist film was heated for 90 seconds at each predetermined temperature, and immersed in a 2.38 mass% TMAH alkaline developer for 60 seconds to perform development. Thereafter, the resist film was washed with ultrapure water for 30 seconds and dried to form a positive resist pattern. The formed resist pattern was observed for line and space by a scanning electron microscope (S-4800 manufactured by Hitachi High-Technologies Corporation), and the reactivity of the resist composition by electron beam irradiation was evaluated.
- S-4800 manufactured by Hitachi High-Technologies Corporation
- the compound satisfying the requirements of the present invention is higher in heat resistance than the comparative compound (CR-1), and can impart a favorable resist pattern shape.
- the same effect is exhibited for compounds other than the compounds described in the examples as long as the requirements of the present invention are satisfied.
- composition for lower-layer film formation for lithography was prepared so that it might become a composition shown in the following Table 3.
- the following were used as the acid generator, the crosslinking agent and the solvent.
- Acid generator Midori Chemical Co., Ltd.
- Crosslinking agent Sanwa Chemical Co., Ltd.
- Solvent Propylene glycol monomethyl ether acetate (PGMEA)
- Example 9 The composition for forming an underlayer film for lithography of Example 6 is applied onto a 300 nm thick SiO 2 substrate, and baked at 240 ° C. for 60 seconds, and further at 400 ° C. for 120 seconds to form an underlayer film of 85 nm thickness. It formed. A resist solution for ArF was coated on this lower layer film, and baked at 130 ° C. for 60 seconds to form a photoresist layer with a film thickness of 140 nm.
- the compound of formula (16) was prepared as follows. 4.25 g of 2-methyl-2-methacryloyloxyadamantane, 3.00 g of methacryloyloxy- ⁇ -butyrolactone, 2.08 g of 3-hydroxy-1-adamantyl methacrylate, 0.38 g of azobisisobutyronitrile, in 80 ml of tetrahydrofuran It was dissolved to make a reaction solution. The reaction solution was polymerized under a nitrogen atmosphere at a reaction temperature of 63 ° C. for 22 hours, and then the reaction solution was dropped into 400 mL of n-hexane. The product resin thus obtained was coagulated and purified, and the produced white powder was filtered and dried overnight under reduced pressure at 40 ° C. to obtain a compound represented by the following formula (16).
- the photoresist layer is exposed using an electron beam lithography system (manufactured by Elionix; ELS-7500, 50 keV), baked at 115 ° C. for 90 seconds (PEB), 2.38 mass% tetramethylammonium hydroxide ( By developing with TMAH) aqueous solution for 60 seconds, a positive resist pattern was obtained.
- ELS-7500 electron beam lithography system
- PEB baked at 115 ° C. for 90 seconds
- TMAH 2.38 mass% tetramethylammonium hydroxide
- Example 10 A positive resist pattern was obtained in the same manner as in Example 9 except that the composition for forming an underlayer film for lithography in Example 7 was used instead of the composition for forming an underlayer film for lithography in Example 6. .
- the evaluation results are shown in Table 4.
- Example 11 A positive resist pattern was obtained in the same manner as in Example 9 except that the composition for forming an underlayer film for lithography in Example 8 was used instead of the composition for forming an underlayer film for lithography in Example 6. .
- the evaluation results are shown in Table 4.
- Comparative Example 3 A photoresist layer was directly formed on a SiO 2 substrate in the same manner as in Example 10 except that the lower layer film was not formed, to obtain a positive resist pattern. The evaluation results are shown in Table 4.
- Examples 9 to 11 using the composition for forming a film for lithography of the present embodiment containing a triazine compound are superior in resolution and in comparison with Comparative Example 3. It was confirmed that the sensitivity was also significantly superior. Further, it was also confirmed that the resist pattern shape after development had no pattern collapse, and the rectangularity was good. Furthermore, the difference in resist pattern shape after development shows that the underlayer film obtained from the composition for forming a film for lithography of Examples 9 to 11 has good adhesion to the resist material.
- An optical component forming composition was prepared according to the formulation shown in Table 5 below. Among the components of the optical component forming composition in Table 5, the following were used as the acid generator, the acid crosslinking agent, the acid diffusion inhibitor, and the solvent. ⁇ Acid generator: manufactured by Midori Chemical Co., Ltd. Ditertiary butyldiphenyliodonium nonafluoromethanesulfonate (DTDPI) Cross-linking agent: manufactured by Sanwa Chemical Co., Ltd.
- DTDPI Ditertiary butyldiphenyliodonium nonafluoromethanesulfonate
- Nicarak MX 270 (Nicarak) Organic solvent Propylene glycol monomethyl ether acetate (PGMEA)
- PMEA Propylene glycol monomethyl ether acetate
- the optical component-forming composition in a uniform state was spin-coated on a clean silicon wafer and then prebaked (PB) in an oven at 110 ° C. to form an optical component-forming film with a thickness of 1 ⁇ m.
- the prepared optical component forming composition was evaluated as “A” when film formation was good, and “C” when there was a defect in the formed film.
- the uniform optical component forming composition was spin coated on a clean silicon wafer and then PB in an oven at 110 ° C. to form a 1 ⁇ m thick film.
- Synthesis Example 1 Synthesis of BisN-20 A four-necked flask with an interior volume of 1 L capable of removing bottom and equipped with a Dimroth condenser, a thermometer and a stirrer was prepared. A solution obtained by adding 12.0 g (17.1 mmol) of a triazine compound (LA-F70 manufactured by ADEKA Corporation) and 6.2 g (45 mmol) of potassium carbonate to 100 mL acetone in a nitrogen stream in this four-necked flask Then, 3.24 g (45 mmol) of acrylic acid was further added, and the obtained reaction solution was reacted under stirring at reflux for 7 hours.
- a triazine compound LA-F70 manufactured by ADEKA Corporation
- Synthesis Example 2 Synthesis of BisN-21 A 0.5 L four-necked flask equipped with a Dimroth condenser, a thermometer and a stirring blade was prepared. A solution obtained by adding 12.0 g (17.1 mmol) of a triazine compound (LA-F70 manufactured by ADEKA) and 6.2 g (45 mmol) of potassium carbonate to 100 mL acetone in a nitrogen stream in this four-necked flask Then, 3.87 g (45 mmol) of methacrylic acid was further added, and the resulting reaction solution was reacted by stirring under reflux for 7 hours.
- a triazine compound LA-F70 manufactured by ADEKA
- Synthesis Example 4 Synthesis of BisN-23 A 0.5 L four-necked flask equipped with a Dimroth condenser, a thermometer and a stirrer was prepared. A solution obtained by adding 12.0 g (17.1 mmol) of a triazine compound (LA-F70 manufactured by ADEKA) and 6.2 g (45 mmol) of potassium carbonate to 100 mL acetone in a nitrogen stream in this four-necked flask Further, 5.4 g (45 mmol) of allyl bromide and 2.0 g of 18-crown-6 were added, and the resulting reaction solution was reacted by stirring under reflux for 6.5 hours.
- a triazine compound LA-F70 manufactured by ADEKA
- Synthesis Example 5 Synthesis of BisN-24 A four-necked flask having an internal volume of 1 L capable of removing bottom and equipped with a Dimroth condenser, a thermometer and a stirring blade was prepared. In this four-necked flask, a solution obtained by adding 12.0 g (19.0 mmol) of a triazine compound (TINUVIN 460 manufactured by BASF Corp.) and 6.2 g (45 mmol) of potassium carbonate to 100 mL acetone in a nitrogen stream is charged. Further, 3.24 g (45 mmol) of acrylic acid was added, and the resulting reaction solution was stirred under reflux for 7 hours for reaction.
- a triazine compound TINUVIN 460 manufactured by BASF Corp.
- Synthesis Example 6 Synthesis of BisN-25 A 0.5 L four-necked flask equipped with a Dimroth condenser, a thermometer and a stirring blade was prepared. In this four-necked flask, a solution of 12.0 g (19.0 mmol) of a triazine compound (TINUVIN 460 manufactured by BASF Corp.) and 6.2 g (45 mmol) of potassium carbonate in 100 mL acetone under nitrogen stream is charged. Further, 3.87 g (45 mmol) of methacrylic acid was added, and the resulting reaction solution was reacted under stirring at reflux for 7 hours.
- a triazine compound TINUVIN 460 manufactured by BASF Corp.
- Synthesis Example 7 Synthesis of BisN-26 A 0.5 L four-necked flask equipped with a Dimroth condenser, a thermometer and a stirring blade was prepared. A liquid prepared by adding 12.0 g (19.0 mmol) of a triazine compound (TINUVIN 460 manufactured by BASF Corp.) and 6.2 g (45 mmol) of potassium carbonate to 100 mL dimethylacetamide in a nitrogen stream in this four-necked flask Preparation, furthermore epichlorohydrin4. g (45 mmol) was added, and the resulting reaction solution was reacted by stirring at 90 ° C. for 6.5 hours.
- a triazine compound TINUVIN 460 manufactured by BASF Corp.
- Synthesis Example 8 Synthesis of BisN-27 A 0.5 L four-necked flask equipped with a Dimroth condenser, a thermometer and a stirrer was prepared. In this four-necked flask, a solution of 12.0 g (19.0 mmol) of a triazine compound (TINUVIN 460 manufactured by BASF Corp.) and 6.2 g (45 mmol) of potassium carbonate in 100 mL acetone under nitrogen stream is charged. Further, 5.4 g (45 mmol) of allyl bromide and 2.0 g of 18-crown-6 were added, and the resulting reaction solution was reacted by stirring under reflux for 6.5 hours.
- a triazine compound TINUVIN 460 manufactured by BASF Corp.
- UV curability was evaluated from the calculated residual film rate according to the following criteria.
- the evaluation results are shown in Table 6. From a practical point of view, the application to the UV curing semiconductor microfabrication process is most preferably “S”, then “A”, then “B”, and so on up to “C” can be applied to the UV curing process It was evaluated that it was a good level. The "D” was evaluated as not applicable to the UV curing process.
- the residual film rate was 90% or more.
- A The residual film rate was 80% or more and less than 90%.
- B The residual film rate was 50% or more and less than 80%.
- C The residual film rate was 20% or more and less than 50%.
- D The residual film rate was less than 20%.
- Examples 15 to 30 exhibited good UV curing properties. In particular, it was confirmed that the UV curing characteristics can be improved when the photopolymerization initiator is contained. On the other hand, in Comparative Examples 5 and 6, UV curing was not performed.
- the film forming material of the present embodiment has relatively high heat resistance, relatively high solvent solubility, and is applicable to a wet process. Therefore, the composition for film formation for lithography containing the film formation material of the present embodiment can be widely and effectively used in various applications where these performances are required. In particular, in the field of an underlayer film for lithography and an underlayer film for multilayer resist, it can be used particularly effectively. Furthermore, since the material for film formation of the present embodiment is excellent in heat resistance, transparency and refractive index, it can be effectively used particularly as a material for forming an optical component.
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Abstract
Description
下記式(1)で表されるトリアジン系化合物を含有する、膜形成材料。
[2]
前記式(1)で表されるトリアジン系化合物は、下記式(2)で表されるトリアジン系化合物である、[1]に記載の膜形成材料。
[3]
前記式(2)で表されるトリアジン系化合物は、下記式(3)で表されるトリアジン系化合物である、[2]に記載の膜形成材料。
[4]
前記式(3)で表されるトリアジン系化合物は、下記式(4)で表されるトリアジン系化合物である、[3]に記載の膜形成材料。
[5]
前記式(2)で表されるトリアジン系化合物は、下記式(5)で表されるトリアジン系化合物である、[2]に記載の膜形成材料。
[6]
前記式(5)で表されるトリアジン系化合物は、下記式(BisN-8)で表されるトリアジン系化合物である、[5]に記載の膜形成材料。
下記式(6)で表されるトリアジン系化合物を含有する、膜形成材料。
[8]
光硬化性モノマー、光硬化性オリゴマー、及び光硬化性ポリマーからなる群から選ばれる1種以上と、光重合開始剤と、をさらに含有する、[7]に記載の膜形成材料。
[9]
[1]~[8]のいずれかに記載の膜形成材料からなる群より選ばれる1種以上を含有する、リソグラフィー用膜形成用組成物。
[10]
[1]~[8]のいずれかに記載の膜形成材料からなる群より選ばれる1種以上を含有する、光学部品形成用材料。
[11]
[1]~[8]のいずれかに記載の膜形成材料からなる群より選ばれる1種以上を含有する、レジスト組成物。
[12]
溶媒をさらに含有する、[11]に記載のレジスト組成物。
[13]
酸発生剤をさらに含有する、[11]又は[12]に記載のレジスト組成物。
[14]
酸拡散制御剤をさらに含有する、[11]~[13]のいずれかに記載のレジスト組成物。
[15]
[11]~[14]のいずれかに記載のレジスト組成物を用いて、基板上にレジスト膜を形成する工程と、
前記レジスト膜の少なくとも一部を露光する工程と、
露光した前記レジスト膜を現像してレジストパターンを形成する工程と、
を含む、レジストパターン形成方法。
[16]
[11]~[14]のいずれかに記載のレジスト組成物から得られる、レジスト用永久膜。
[17]
[1]~[8]のいずれかに記載の膜形成材料からなる群より選ばれる1種以上である成分(A)と、ジアゾナフトキノン光活性化合物(B)と、溶媒と、を含有する感放射線性組成物であって、
前記溶媒の含有量が、前記感放射線性組成物の総量100質量%に対して20~99質量%である、感放射線性組成物。
[18]
前記成分(A)と、前記ジアゾナフトキノン光活性化合物(B)と、その他の任意成分(D)と、の含有量比((A)/(B)/(D))が、前記感放射線性組成物の固形分100質量%に対して、1~99質量%/99~1質量%/0~98質量%である、[17]に記載の感放射線性組成物。
[19]
スピンコートによりアモルファス膜を形成することができる、[17]又は[18]に記載の感放射線性組成物。
[20]
[17]~[19]のいずれかに記載の感放射線性組成物を用いて、基板上にアモルファス膜を形成する工程を含む、アモルファス膜の製造方法。
[21]
[17]~[19]のいずれかに記載の感放射線性組成物を用いて、基板上にレジスト膜を形成する工程と、
前記レジスト膜の少なくとも一部を露光する工程と、
露光した前記レジスト膜を現像して、レジストパターンを形成する工程と、
を含む、レジストパターン形成方法。
[22]
[1]~[8]のいずれかに記載の膜形成材料からなる群より選ばれる1種以上を含有する、リソグラフィー用下層膜形成材料。
[23]
[22]に記載のリソグラフィー用下層膜形成材料と、溶媒と、を含有する、リソグラフィー用下層膜形成用組成物。
[24]
酸発生剤をさらに含有する、[23]に記載のリソグラフィー用下層膜形成用組成物。
[25]
架橋剤をさらに含有する、[23]又は[24]に記載のリソグラフィー用下層膜形成用組成物。
[26]
[23]~[25]のいずれかに記載のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程を含む、リソグラフィー用下層膜の製造方法。
[27]
[23]~[25]のいずれかに記載のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程と、
前記下層膜上に、少なくとも1層のフォトレジスト層を形成する工程と、
前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程と、
を含む、レジストパターン形成方法。
[28]
[23]~[25]のいずれかに記載のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程と、
前記下層膜上に、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する工程と、
前記中間層膜上に、少なくとも1層のフォトレジスト層を形成する工程と、
前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程と、
前記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て、中間層膜パターンを形成する工程と、
前記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て、下層膜パターンを形成する工程と、
前記下層膜パターンをエッチングマスクとして前記基板をエッチングして、前記基板にパターンを形成する工程と、
を含む、回路パターン形成方法。
本実施形態の一態様に係る膜形成材料は、下記式(1)で表されるトリアジン系化合物を含有する。なお、本明細書における「膜」とは、例えば、リソグラフィー用膜や光学部品等(ただし、これらに限定されるものではない。)に適用されうるものを意味し、典型的には、リソグラフィー用膜や光学部品として一般的な形態を有するものである。すなわち、「膜形成材料」とは、このような膜の前駆体であり、その形態及び/又は組成において、当該「膜」とは明確に区別されるものである。また、「リソグラフィー用膜」とは、例えば、レジスト用永久膜、リソグラフィー用下層膜等のリソグラフィー用途の膜を広く包含する概念である。
本実施形態の他の態様に係る膜形成材料は、下記式(6)で表されるトリアジン系化合物を含有するものであり、特に光硬化性膜を形成するための材料として好ましく用いることができる。
光硬化性モノマー、光硬化性オリゴマー、光硬化性ポリマーとしては、ラジカル重合可能な官能基を1つ以上有するものが好ましく、(メタ)アクリレート化合物が好ましい。光硬化性モノマー、光硬化性オリゴマー、光硬化性ポリマーの含有量は、光硬化性膜形成材料全体に対して80~95質量%であることが好ましい。
本実施形態の光学部品形成用材料は、上述した本実施形態における膜形成材料を含有する。ここで、「光学部品」とは、フィルム状、シート状の部品の他、プラスチックレンズ(プリズムレンズ、レンチキュラーレンズ、マイクロレンズ、フレネルレンズ、視野角制御レンズ、コントラスト向上レンズ等)、位相差フィルム、電磁波シールド用フィルム、プリズム、光ファイバー、フレキシブルプリント配線用ソルダーレジスト、メッキレジスト、多層プリント配線板用層間絶縁膜、感光性光導波路をいう。本実施形態における化合物はこれらの光学部品形成用途に有用である。
本実施形態のレジスト組成物は、上述した本実施形態における膜形成材料を含有する。
本実施形態のレジスト組成物は、上述した式(1)で表される構造を有する化合物及び該化合物群より選ばれる1種以上の物質以外に、必要に応じて、架橋剤、酸発生剤、有機溶媒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。
本実施形態のレジスト組成物は、可視光線、紫外線、エキシマレーザー、電子線、極端紫外線(EUV)、X線及びイオンビームから選ばれるいずれかの放射線の照射により直接的又は間接的に酸を発生する酸発生剤(C)を1種以上含むことが好ましい。酸発生剤(C)は、特に限定されないが、例えば、国際公開WO2013/024778号に記載のものを用いることができる。酸発生剤(C)は、単独で又は2種以上を使用することができる。これらの酸発生剤の中でも、耐熱性の観点から、芳香環を有する酸発生剤が好ましく、下記式(8-1)又は(8-2)で表される構造を有する酸発生剤がより好ましい。
本実施形態のレジスト組成物は、酸架橋剤(G)を1種以上含むことが好ましい。酸架橋剤(G)とは、酸発生剤(C)から発生した酸の存在下で、成分(A)を分子内又は分子間架橋し得る化合物である。このような酸架橋剤(G)としては、例えば、成分(A)を架橋し得る1種以上の基(以下、「架橋性基」という。)を有する化合物を挙げることができる。
本実施形態のレジスト組成物は、放射線照射により酸発生剤から生じた酸のレジスト膜中における拡散を制御して、未露光領域での好ましくない化学反応を阻止する作用等を有する酸拡散制御剤(E)を含んでいてもよい。このような酸拡散制御剤(E)を使用することにより、レジスト組成物の貯蔵安定性が向上する。また解像度が向上するとともに、放射線照射前の引き置き時間、放射線照射後の引き置き時間の変動によるレジストパターンの線幅変化を抑えることができ、プロセス安定性に極めて優れたものとなる。このような酸拡散制御剤(E)としては、特に限定されないが、窒素原子含有塩基性化合物、塩基性スルホニウム化合物、塩基性ヨードニウム化合物等の放射線分解性塩基性化合物が挙げられる。
本実施形態のレジスト組成物には、その他の成分(F)(「任意成分(F)」ともいう。)として、必要に応じて、溶解促進剤、溶解制御剤、増感剤、界面活性剤、及び有機カルボン酸又はリンのオキソ酸若しくはその誘導体等の各種添加剤を1種又は2種以上添加することができる。
溶解促進剤は、式(1)で表される化合物の現像液に対する溶解性が低すぎる場合に、その溶解性を高めて、現像時の上記化合物の溶解速度を適度に増大させる作用を有する成分であり、必要に応じて、使用することができる。上記溶解促進剤としては、例えば、低分子量のフェノール性化合物を挙げることができ、例えば、ビスフェノール類、トリス(ヒドロキシフェニル)メタン等を挙げることができる。これらの溶解促進剤は、単独で又は2種以上を混合して使用することができる。
溶解制御剤は、式(1)で表される化合物の現像液に対する溶解性が高すぎる場合に、その溶解性を制御して現像時の溶解速度を適度に減少させる作用を有する成分である。このような溶解制御剤としては、レジスト被膜の焼成、放射線照射、現像等の工程において化学変化しないものが好ましい。
増感剤は、照射された放射線のエネルギーを吸収して、そのエネルギーを酸発生剤(C)に伝達し、それにより酸の生成量を増加する作用を有し、レジストの見掛けの感度を向上させる成分である。このような増感剤としては、例えば、ベンゾフェノン類、ビアセチル類、ピレン類、フェノチアジン類、フルオレン類等を挙げることができるが、特に限定はされない。これらの増感剤は、単独で又は2種以上を使用することができる。
界面活性剤はレジスト組成物の塗布性やストリエーション、レジストの現像性等を改良する作用を有する成分である。このような界面活性剤としては、アニオン系界面活性剤、カチオン系界面活性剤、ノニオン系界面活性剤あるいは両性界面活性剤のいずれでもよい。好ましい界面活性剤はノニオン系界面活性剤である。ノニオン系界面活性剤は、レジスト組成物の製造に用いる溶媒との親和性がよく、上述した効果がより顕著となる。ノニオン系界面活性剤の例としては、ポリオキシエチレン高級アルキルエーテル類、ポリオキシエチレン高級アルキルフェニルエーテル類、ポリエチレングリコールの高級脂肪酸ジエステル類等が挙げられるが、特に限定されない。市販品としては、以下商品名で、エフトップ(ジェムコ社製)、メガファック(大日本インキ化学工業社製)、フロラード(住友スリーエム社製)、アサヒガード、サーフロン(以上、旭硝子社製)、ペポール(東邦化学工業社製)、KP(信越化学工業社製)、ポリフロー(共栄社油脂化学工業社製)等を挙げることができる。
レジスト組成物には、感度劣化防止又はレジストパターン形状、引き置き安定性等の向上の目的で、さらに任意の成分として、有機カルボン酸又はリンのオキソ酸若しくはその誘導体を含有させることができる。なお、有機カルボン酸又はリンのオキソ酸若しくはその誘導体は、酸拡散制御剤と併用することもできるし、単独で用いてもよい。有機カルボン酸としては、例えば、マロン酸、クエン酸、リンゴ酸、コハク酸、安息香酸、サリチル酸などが好適である。リンのオキソ酸若しくはその誘導体としては、リン酸、リン酸ジ-n-ブチルエステル、リン酸ジフェニルエステルなどのリン酸又はそれらのエステルなどの誘導体、ホスホン酸、ホスホン酸ジメチルエステル、ホスホン酸ジ-n-ブチルエステル、フェニルホスホン酸、ホスホン酸ジフェニルエステル、ホスホン酸ジベンジルエステル等のホスホン酸又はそれらのエステルなどの誘導体、ホスフィン酸、フェニルホスフィン酸などのホスフィン酸及びそれらのエステルなどの誘導体が挙げられ、これらの中でも特にホスホン酸が好ましい。
さらに、本実施形態のレジスト組成物には、必要に応じて、上記溶解制御剤、増感剤、界面活性剤、及び有機カルボン酸又はリンのオキソ酸若しくはその誘導体以外の添加剤を1種又は2種以上配合することができる。そのような添加剤としては、例えば、染料、顔料、及び接着助剤等が挙げられる。例えば、染料又は顔料を配合すると、露光部の潜像を可視化させて、露光時のハレーションの影響を緩和できるので好ましい。また、接着助剤を配合すると、基板との接着性を改善することができるので好ましい。さらに、他の添加剤としては、ハレーション防止剤、保存安定剤、消泡剤、形状改良剤等が挙げられ、具体的には4-ヒドロキシ-4’-メチルカルコン等を挙げることができる。
本実施形態のレジスト組成物において、本実施形態の化合物及び該化合物群より選ばれる1種以上の物質(成分(A))の含有量は、特に限定されないが、固形成分の全質量(成分(A)、酸発生剤(C)、酸架橋剤(G)、酸拡散制御剤(E)及びその他の成分(F)などの任意に使用される成分を含む固形成分の総和、以下同様。)の50~99.4質量%であることが好ましく、より好ましくは55~90質量%、さらに好ましくは60~80質量%、特に好ましくは60~70質量%である。上記含有量の場合、解像度が一層向上し、ラインエッジラフネス(LER)が一層小さくなる傾向にある。
本実施形態のレジスト組成物は、スピンコートによりアモルファス膜を形成することができ、一般的な半導体製造プロセスに適用することができる。また、用いる現像液の種類によって、ポジ型レジストパターン及びネガ型レジストパターンのいずれかを作り分けることができる。
本実施形態の感放射線性組成物は、上述した本実施形態の膜形成材料からなる群より選ばれる1種以上の物質(成分(A))と、ジアゾナフトキノン光活性化合物(B)と、溶媒と、を含有する感放射線性組成物であって、前記溶媒の含有量が、前記感放射線性組成物の総量100質量%に対して、20~99質量%である。
本実施形態の感放射線性組成物に含まれるジアゾナフトキノン光活性化合物(B)は、ポリマー性及び非ポリマー性ジアゾナフトキノン光活性化合物を含むジアゾナフトキノン物質であり、一般にポジ型レジスト組成物において、感光性成分(感光剤)として用いられているものであれば特に制限なく、1種又は2種以上を任意に選択して用いることができる。
本実施形態の感放射線性組成物に用いることのできる溶媒としては、特に限定されないが、例えば、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノメチルエーテル、シクロヘキサノン、シクロペンタノン、2-ヘプタノン、アニソール、酢酸ブチル、プロピオン酸エチル、及び乳酸エチルが挙げられる。この中でもプロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノメチルエーテル、シクロヘキサノンが好ましい。溶媒は、1種を単独で用いても2種以上を併用してもよい。
本実施形態の感放射線性組成物は、スピンコートによりアモルファス膜を形成することができ、一般的な半導体製造プロセスに適用することができる。また、用いる現像液の種類によって、ポジ型レジストパターン及びネガ型レジストパターンのいずれかを作り分けることができる。
本実施形態の感放射線性組成物において、成分(A)の含有量は、固形成分全質量(成分(A)、ジアゾナフトキノン光活性化合物(B)及びその他の成分(D)などの任意に使用される固形成分の総和、以下同様。)に対して、好ましくは1~99質量%であり、より好ましくは5~95質量%、さらに好ましくは10~90質量%、特に好ましくは25~75質量%である。本実施形態の感放射線性組成物は、成分(A)の含有量が上記範囲内であると、高感度でラフネスの小さなパターンを得ることができる傾向にある。
本実施形態の感放射線性組成物には、必要に応じて、成分(A)及びジアゾナフトキノン光活性化合物(B)以外の成分として、上述の酸発生剤、酸架橋剤、酸拡散制御剤、溶解促進剤、溶解制御剤、増感剤、界面活性剤、有機カルボン酸又はリンのオキソ酸若しくはその誘導体等の各種添加剤を1種又は2種以上添加することができる。なお、本明細書において、その他の成分(D)を「任意成分(D)」ということがある。
本実施形態のアモルファス膜の製造方法は、上記感放射線性組成物を用いて、基板上にアモルファス膜を形成する工程を含む。
本実施形態の感放射線性組成物を用いたレジストパターン形成方法は、上記感放射線性組成物を用いて、基板上にレジスト膜を形成する工程と、形成された前記レジスト膜の少なくとも一部を露光する工程と、露光した前記レジスト膜を現像してレジストパターンを形成する工程と、を含む。なお、詳細には、以下のレジスト組成物を用いたレジストパターン形成方法と同様の操作とすることができる。
本実施形態のレジスト組成物を用いたレジストパターンの形成方法は、上述した本実施形態のレジスト組成物を用いて基板上にレジスト膜を形成する工程と、形成されたレジスト膜の少なくとも一部を露光する工程と、露光した前記レジスト膜を現像してレジストパターンを形成する工程とを備える。本実施形態におけるレジストパターンは多層プロセスにおける上層レジストとして形成することもできる。
本実施形態のリソグラフィー用下層膜形成材料は、上述した本実施形態の膜形成材料からなる群より選ばれる1種以上を含有する。本実施形態のリソグラフィー用下層膜形成材料に含まれる成分(A)の含有量は、塗布性及び品質安定性の点から、リソグラフィー用下層膜形成材料中、1~100質量%であることが好ましく、10~100質量%であることがより好ましく、50~100質量%であることがさらに好ましく、100質量%であることが特に好ましい。
本実施形態のリソグラフィー用下層膜形成用組成物は、上記リソグラフィー用下層膜形成材料と溶媒とを含有する。
本実施形態のリソグラフィー用下層膜形成用組成物において用いられる溶媒としては、上述した成分(A)が少なくとも溶解するものであれば、公知のものを適宜用いることができる。
本実施形態のリソグラフィー用下層膜形成用組成物は、インターミキシングを抑制する等の観点から、必要に応じて架橋剤を含有していてもよい。本実施形態で使用可能な架橋剤としては、特に限定されないが、例えば、国際公開WO2013/024779号に記載のものを用いることができる。なお、本実施形態において、架橋剤は、単独で又は2種以上を使用することができる。
本実施形態のリソグラフィー用下層膜形成用組成物は、熱による架橋反応をさらに促進させるなどの観点から、必要に応じて酸発生剤を含有していてもよい。酸発生剤としては、熱分解によって酸を発生するもの、光照射によって酸を発生するものなどが知られているが、いずれのものも使用することができる。
さらに、本実施形態のリソグラフィー用下層膜形成用組成物は、保存安定性を向上させる等の観点から、塩基性化合物を含有していてもよい。
また、本実施形態のリソグラフィー用下層膜形成用組成物は、熱硬化性の付与や吸光度をコントロールする目的で、他の樹脂及び/又は化合物を含有していてもよい。このような他の樹脂及び/又は化合物としては、ナフトール樹脂、キシレン樹脂ナフトール変性樹脂、ナフタレン樹脂のフェノール変性樹脂、ポリヒドロキシスチレン、ジシクロペンタジエン樹脂、(メタ)アクリレート、ジメタクリレート、トリメタクリレート、テトラメタクリレート、ビニルナフタレン、ポリアセナフチレンなどのナフタレン環、フェナントレンキノン、フルオレンなどのビフェニル環、チオフェン、インデンなどのヘテロ原子を有する複素環を含む樹脂や芳香族環を含まない樹脂;ロジン系樹脂、シクロデキストリン、アダマンタン(ポリ)オール、トリシクロデカン(ポリ)オール及びそれらの誘導体等の脂環構造を含む樹脂又は化合物等が挙げられるが、これらに特に限定されない。さらに、本実施形態のリソグラフィー用下層膜形成用組成物は、公知の添加剤を含有していてもよい。上記公知の添加剤としては、以下に限定されないが、例えば、紫外線吸収剤、界面活性剤、着色剤、ノニオン系界面活性剤等が挙げられる。
本実施形態のリソグラフィー用下層膜の形成方法は、本実施形態のリソグラフィー用下層膜形成用組成物を用いて、基板上に下層膜を形成する工程を含む。
本実施形態のリソグラフィー用下層膜形成用組成物を用いたレジストパターン形成方法は、本実施形態のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程(A-1)と、前記下層膜上に、少なくとも1層のフォトレジスト層を形成する工程(A-2)と、前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程(A-3)と、を含む。
本実施形態のリソグラフィー用下層膜形成用組成物を用いた回路パターン形成方法は、本実施形態のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程(B-1)と、前記下層膜上に、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する工程(B-2)と、前記中間層膜上に、少なくとも1層のフォトレジスト層を形成する工程(B-3)と、前記工程(B-3)の後、前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程(B-4)と、前記工程(B-4)の後、前記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て、中間層膜パターンを形成する工程(B-5)と、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て、下層膜パターンを形成する工程(B-6)と、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工程(B-7)と、を含む。
なお、前記レジスト組成物を用いてレジスト用永久膜を作製することもできる、前記レジスト組成物を塗布してなるレジスト用永久膜は、必要に応じてレジストパターンを形成した後、最終製品にも残存する永久膜として好適である。永久膜の具体例としては、以下に限定されないが、半導体デバイス関係では、ソルダーレジスト、パッケージ材、アンダーフィル材、回路素子等のパッケージ接着層や集積回路素子と回路基板の接着層、薄型ディスプレー関連では、薄膜トランジスタ保護膜、液晶カラーフィルター保護膜、ブラックマトリクス、スペーサー等が挙げられる。特に、前記レジスト組成物からなる永久膜は、耐熱性や耐湿性に優れている上に昇華成分による汚染性が少ないという非常に優れた利点も有する。特に表示材料において、重要な汚染による画質劣化の少ない高感度、高耐熱、吸湿信頼性を兼ね備えた材料となる。
上記式(1)で表されるトリアジン系化合物の精製方法は、当該トリアジン系化合物を、溶媒に溶解させて溶液(S)を得る工程と、得られた溶液(S)と酸性の水溶液とを接触させて、前記化合物中の不純物を抽出する第一抽出工程とを含み、前記溶液(S)を得る工程で用いる溶媒が、水と混和しない有機溶媒を含む。
エスアイアイ・ナノテクノロジー社製EXSTAR6000TG-DTA装置を使用し、試料約5mgをアルミニウム製非密封容器に入れ、窒素ガス(100ml/min)気流中昇温速度10℃/minで500℃まで昇温することにより熱重量減少量を測定し、以下の基準で評価した。
実用的観点からは、下記A又はB評価が好ましい。A又はB評価であれば、高い耐熱性を有し、高温ベークへの適用が可能となる。
<評価基準>
A:400℃での熱重量減少量が、10%未満
B:400℃での熱重量減少量が、10%~25%
C:400℃での熱重量減少量が、25%超
50mLのスクリュー瓶に化合物を仕込み、23℃にてマグネチックスターラーで1時間撹拌後に、化合物のオルソキシレン(OX)に対する溶解量を測定し、その結果を以下の基準で評価した。
実用的観点からは、下記A又はB評価が好ましい。A又はB評価であれば、溶液状態で高い保存安定性を有し、半導体微細加工プロセスへの適用が可能となる。
<評価基準>
A:15質量%以上
B:10質量%以上15質量%未満
C:10質量%未満
以下の式で表される構造を有するトリアジン化合物((株)ADEKA社製 LA-F70)を単独で用いて、リソグラィー用膜形成用材料とした。
前記リソグラフィー膜形成用材料10質量部に対し、溶媒としてOXを90質量部加え、室温下、スターラーで少なくとも3時間以上攪拌させることにより、リソグラィー用膜形成組成物を調製した。
以下の式で表される構造を有するトリアジン化合物(BASF(株)社製 TINUVIN460)を単独で用いて、リソグラィー用膜形成用材料とした。
前記リソグラフィー膜形成用材料10質量部に対し、溶媒としてOXを90質量部加え、室温下、スターラーで少なくとも3時間以上攪拌させることにより、リソグラィー用膜形成組成物を調製した。
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10Lの四つ口フラスコを準備した。こ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1.09kg(7mol、三菱ガス化学(株)製)、40質量%ホルマリン水溶液2.1kg(ホルムアルデヒドとして28mol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)0.97mLを仕込み、常圧下、100℃で還流させながら7時間反応させた。その後、希釈溶媒としてエチルベンゼン(和光純薬工業(株)製、試薬特級)1.8kgを反応液に加え、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で留去することにより、淡褐色固体のジメチルナフタレンホルムアルデヒド樹脂1.25kgを得た。
得られたジメチルナフタレンホルムアルデヒドの分子量は、数平均分子量(Mn):562、重量平均分子量(Mw):1168、分散度(Mw/Mn):2.08であった。
得られた樹脂(CR-1)は、Mn:885、Mw:2220、Mw/Mn:4.17であった。
熱重量測定(TG)の結果、得られた樹脂の400℃での熱減少量は25%超(評価C)であった。そのため、高温ベークへの適用が困難であるものと評価された。OXへの溶解性を評価した結果、15質量%以上(評価A)であり、優れた溶解性を有するものと評価された。
なお、上記のMn、Mw及びMw/Mnについては、以下の条件にてゲル浸透クロマトグラフィー(GPC)分析を行い、ポリスチレン換算の分子量を求めることにより測定した。
装置:Shodex GPC-101型(昭和電工(株)製)
カラム:KF-80M×3
溶離液:THF 1mL/min
温度:40℃
表1から明らかなように、実施例1のリソグラフィー膜形成用組成物は、耐熱性が良好であることが確認できた。
(レジスト組成物の調製)
上記膜形成材料を用いて、表2に示す配合でレジスト組成物を調製した。なお、表2中のレジスト組成物の各成分のうち、酸発生剤(C)、酸拡散制御剤(E)及び溶媒については、以下のものを用いた。
酸発生剤(C):P-1:トリフェニルスルホニウム トリフルオロメタンスルホネート(みどり化学(株))
酸拡散制御剤(E):Q-1:トリオクチルアミン(東京化成工業(株))
溶媒:S-1:プロピレングリコールモノメチルエーテル(東京化成工業(株))
均一なレジスト組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中で露光前ベーク(PB)して、厚さ60nmのレジスト膜を形成した。得られたレジスト膜に対して、電子線描画装置(ELS-7500、(株)エリオニクス社製)を用いて、80nm間隔の1:1のラインアンドスペース設定の電子線を照射した。当該照射後に、レジスト膜を、それぞれ所定の温度で、90秒間加熱し、TMAH2.38質量%アルカリ現像液に60秒間浸漬して現像を行った。その後、レジスト膜を、超純水で30秒間洗浄、乾燥して、ポジ型のレジストパターンを形成した。形成されたレジストパターンについて、ラインアンドスペースを走査型電子顕微鏡((株)日立ハイテクノロジー製S-4800)により観察し、レジスト組成物の電子線照射による反応性を評価した。
(リソグラフィー用下層膜形成用組成物の調製)
以下の表3に示す組成となるように、リソグラフィー用下層膜形成用組成物を調製した。なお、表3中のリソグラフィー用下層膜形成用組成物の各成分のうち、酸発生剤、架橋剤及び溶媒については、以下のものを用いた。
酸発生剤:みどり化学社製 ジターシャリーブチルジフェニルヨードニウムノナフルオロメタンスルホナート(DTDPI)
架橋剤:三和ケミカル社製 ニカラックMX270(ニカラック)
溶媒: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)
実施例6のリソグラフィー用下層膜形成用組成物を膜厚300nmのSiO2基板上に塗布して、240℃で60秒間、さらに400℃で120秒間ベークすることにより、膜厚85nmの下層膜を形成した。この下層膜上に、ArF用レジスト溶液を塗布し、130℃で60秒間ベークすることにより、膜厚140nmのフォトレジスト層を形成した。
2-メチル-2-メタクリロイルオキシアダマンタン4.15g、メタクリルロイルオキシ-γ-ブチロラクトン3.00g、3-ヒドロキシ-1-アダマンチルメタクリレート2.08g、アゾビスイソブチロニトリル0.38gを、テトラヒドロフラン80mLに溶解させて反応溶液とした。この反応溶液を、窒素雰囲気下、反応温度を63℃に保持して、22時間重合させた後、反応溶液を400mLのn-ヘキサン中に滴下した。このようにして得られる生成樹脂を凝固精製させ、生成した白色粉末をろ過し、減圧下40℃で一晩乾燥させて下記式(16)で表される化合物を得た。
実施例6におけるリソグラフィー用下層膜形成用組成物の代わりに実施例7のリソグラフィー用下層膜形成用組成物を用いたこと以外は、実施例9と同様にして、ポジ型のレジストパターンを得た。評価結果を表4に示す。
実施例6におけるリソグラフィー用下層膜形成用組成物の代わりに実施例8のリソグラフィー用下層膜形成用組成物を用いたこと以外は、実施例9と同様にして、ポジ型のレジストパターンを得た。評価結果を表4に示す。
下層膜の形成を行わなかったこと以外は、実施例10と同様にして、フォトレジスト層をSiO2基板上に直接形成し、ポジ型のレジストパターンを得た。評価結果を表4に示す。
実施例9から11及び比較例3のそれぞれについて、得られた55nmL/S(1:1)及び80nmL/S(1:1)のレジストパターンの形状を(株)日立製作所製の電子顕微鏡(S-4800)を用いて観察した。現像後のレジストパターンの形状については、パターン倒れがなく、矩形性が良好なものを「良好」とし、そうでないものを「不良」として評価した。また、当該観察の結果、パターン倒れが無く、矩形性が良好な最小の線幅を解像性の評価の指標とした。さらに、良好なパターン形状を描画可能な最小の電子線エネルギー量を感度の評価の指標とした。
下記表5に示す配合で光学部品形成組成物を調製した。なお、表5中の光学部品形成組成物の各成分のうち、酸発生剤、酸架橋剤、酸拡散抑制剤、及び溶媒については、以下のものを用いた。
・酸発生剤:みどり化学社製 ジターシャリーブチルジフェニルヨードニウムノナフルオロメタンスルホナート(DTDPI)
・架橋剤:三和ケミカル社製 ニカラックMX270(ニカラック)
有機溶媒:プロピレングリコールモノメチルエーテルアセテートアセテート(PGMEA)
均一状態の光学部品形成組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中でプレベーク(prebake:PB)して、厚さ1μmの光学部品形成膜を形成した。調製した光学部品形成組成物について、膜形成が良好な場合には「A」、形成した膜に欠陥がある場合には「C」と評価した。
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の四つ口フラスコを準備した。この四つ口フラスコに、窒素気流中、トリアジン化合物((株)ADEKA社製 LA-F70)12.0g(17.1mmol)と炭酸カリウム6.2g(45mmol)とを100mLアセトンに加えた液を仕込み、更にアクリル酸3.24g(45mmol)を加え、得られた反応液を還流下で7時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-20)で表される目的化合物4.1gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流下で、トリアジン化合物((株)ADEKA社製 LA-F70)12.0g(17.1mmol)と炭酸カリウム6.2g(45mmol)とを100mLアセトンに加えた液を仕込み、更にメタクリル酸3.87g(45mmol)を加え、得られた反応液を還流下で7時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-21)で表される目的化合物 3.9gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流下で、トリアジン化合物((株)ADEKA社製 LA-F70)12.0g(17.1mmol)と炭酸カリウム6.2g(45mmol)とを100mLジメチルアセトアミドに加えた液を仕込み、更にエピクロルヒドリン4.g(45mmol)を加え、得られた反応液を90℃で6.5時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-22)で表される目的化合物 4.0gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流下で、トリアジン化合物((株)ADEKA社製 LA-F70)12.0g(17.1mmol)と炭酸カリウム6.2g(45mmol)とを100mLアセトンに加えた液を仕込み、更に臭化アリル5.4g(45mmol)及び18-クラウン-6、2.0gを加え、得られた反応液を還流下6.5時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-23)で表される目的化合物 4.0gを得た。
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の四つ口フラスコを準備した。この四つ口フラスコに、窒素気流中、トリアジン化合物((株)BASF社製 TINUVIN460)12.0g(19.0mmol)と炭酸カリウム6.2g(45mmol)とを100mLアセトンに加えた液を仕込み、更にアクリル酸3.24g(45mmol)を加え、得られた反応液を還流下で7時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-24)で表される目的化合物4.2gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流下で、トリアジン化合物((株)BASF社製 TINUVIN460)12.0g(19.0mmol)と炭酸カリウム6.2g(45mmol)とを100mLアセトンに加えた液を仕込み、更にメタクリル酸3.87g(45mmol)を加え、得られた反応液を還流下で7時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-25)で表される目的化合物3.9gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流下で、トリアジン化合物((株)BASF社製 TINUVIN460)12.0g(19.0mmol)と炭酸カリウム6.2g(45mmol)とを100mLジメチルアセトアミドに加えた液を仕込み、更にエピクロルヒドリン4.g(45mmol)を加え、得られた反応液を90℃で6.5時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-26)で表される目的化合物 4.03gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流下で、トリアジン化合物((株)BASF社製 TINUVIN460)12.0g(19.0mmol)と炭酸カリウム6.2g(45mmol)とを100mLアセトンに加えた液を仕込み、更に臭化アリル5.4g(45mmol)及び18-クラウン-6、2.0gを加え、得られた反応液を還流下6.5時間撹拌して反応を行った。次に反応液から固形分をろ過で除去し、氷浴で冷却し、反応液を濃縮し固形物を析出させた。析出した固形物をろ過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(BisN-27)で表される目的化合物 4.0gを得た。
表6に示す組成(表中、「含有量」は、質量%を示す)にて調製した各実施例15~30及び比較例5~6のリソグラフィー用膜形成用組成物を清浄なシリコンウェハー上に回転塗布し、240℃のオーブン中で60秒ベークしてベーク膜を形成した。ベーク膜に対して、UV照射装置(BJB267:高圧水銀ランプ、GSユアサ(株)製品)を用い、360nm波長のUVを照射し、UV硬化膜を得た。UV硬化膜の膜厚をエリプソメーター(ファイブラボ(株)製品、レーザー波長632.8nm)で計測後、UV硬化膜を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))にそれぞれ室温で60秒間浸漬した。その後、エアーを膜に吹き付け更に100℃で60秒間加熱し、溶媒を除去した。その後、エリプソメーターでUV硬化膜の厚みを再計測し、溶媒浸漬後の残膜率下記式により算出した。
残膜率(%)=溶媒浸漬後のUV硬化膜厚/溶媒浸漬前のUV硬化膜厚×100
S:残膜率が90%以上であった。
A:残膜率が80%以上90%未満であった。
B:残膜率が50%以上80%未満であった。
C:残膜率が20%以上50%未満であった。
D:残膜率が20%未満であった。
Claims (28)
- 下記式(1)で表されるトリアジン系化合物を含有する、膜形成材料。
- 前記式(1)で表されるトリアジン系化合物は、下記式(2)で表されるトリアジン系化合物である、請求項1に記載の膜形成材料。
- 前記式(2)で表されるトリアジン系化合物は、下記式(3)で表されるトリアジン系化合物である、請求項2に記載の膜形成材料。
- 前記式(3)で表されるトリアジン系化合物は、下記式(4)で表されるトリアジン系化合物である、請求項3に記載の膜形成材料。
- 下記式(6)で表されるトリアジン系化合物を含有する、膜形成材料。
- 光硬化性モノマー、光硬化性オリゴマー、及び光硬化性ポリマーからなる群から選ばれる1種以上と、光重合開始剤と、をさらに含有する、請求項7に記載の膜形成材料。
- 請求項1~8のいずれか1項に記載の膜形成材料からなる群より選ばれる1種以上を含有する、リソグラフィー用膜形成用組成物。
- 請求項1~8のいずれか1項に記載の膜形成材料からなる群より選ばれる1種以上を含有する、光学部品形成用材料。
- 請求項1~8のいずれか1項に記載の膜形成材料からなる群より選ばれる1種以上を含有する、レジスト組成物。
- 溶媒をさらに含有する、請求項11に記載のレジスト組成物。
- 酸発生剤をさらに含有する、請求項11又は12に記載のレジスト組成物。
- 酸拡散制御剤をさらに含有する、請求項11~13のいずれか1項に記載のレジスト組成物。
- 請求項11~14のいずれか1項に記載のレジスト組成物を用いて、基板上にレジスト膜を形成する工程と、
前記レジスト膜の少なくとも一部を露光する工程と、
露光した前記レジスト膜を現像してレジストパターンを形成する工程と、
を含む、レジストパターン形成方法。 - 請求項11~14のいずれか1項に記載のレジスト組成物から得られる、レジスト用永久膜。
- 請求項1~8のいずれか1項に記載の膜形成材料からなる群より選ばれる1種以上である成分(A)と、ジアゾナフトキノン光活性化合物(B)と、溶媒と、を含有する感放射線性組成物であって、
前記溶媒の含有量が、前記感放射線性組成物の総量100質量%に対して20~99質量%である、感放射線性組成物。 - 前記成分(A)と、前記ジアゾナフトキノン光活性化合物(B)と、その他の任意成分(D)と、の含有量比((A)/(B)/(D))が、前記感放射線性組成物の固形分100質量%に対して、1~99質量%/99~1質量%/0~98質量%である、請求項17に記載の感放射線性組成物。
- スピンコートによりアモルファス膜を形成することができる、請求項17又は18に記載の感放射線性組成物。
- 請求項17~19のいずれか1項に記載の感放射線性組成物を用いて、基板上にアモルファス膜を形成する工程を含む、アモルファス膜の製造方法。
- 請求項17~19のいずれか1項に記載の感放射線性組成物を用いて、基板上にレジスト膜を形成する工程と、
前記レジスト膜の少なくとも一部を露光する工程と、
露光した前記レジスト膜を現像して、レジストパターンを形成する工程と、
を含む、レジストパターン形成方法。 - 請求項1~8のいずれか1項に記載の膜形成材料からなる群より選ばれる1種以上を含有する、リソグラフィー用下層膜形成材料。
- 請求項22に記載のリソグラフィー用下層膜形成材料と、溶媒と、を含有する、リソグラフィー用下層膜形成用組成物。
- 酸発生剤をさらに含有する、請求項23に記載のリソグラフィー用下層膜形成用組成物。
- 架橋剤をさらに含有する、請求項23又は24に記載のリソグラフィー用下層膜形成用組成物。
- 請求項23~25のいずれか1項に記載のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程を含む、リソグラフィー用下層膜の製造方法。
- 請求項23~25のいずれか1項に記載のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程と、
前記下層膜上に、少なくとも1層のフォトレジスト層を形成する工程と、
前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程と、
を含む、レジストパターン形成方法。 - 請求項23~25のいずれか1項に記載のリソグラフィー用下層膜形成用組成物を用いて基板上に下層膜を形成する工程と、
前記下層膜上に、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する工程と、
前記中間層膜上に、少なくとも1層のフォトレジスト層を形成する工程と、
前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程と、
前記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て、中間層膜パターンを形成する工程と、
前記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て、下層膜パターンを形成する工程と、
前記下層膜パターンをエッチングマスクとして前記基板をエッチングして、前記基板にパターンを形成する工程と、
を含む、回路パターン形成方法。
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JP2019526895A JP7252516B2 (ja) | 2017-06-28 | 2018-06-25 | 膜形成材料、リソグラフィー用膜形成用組成物、光学部品形成用材料、レジスト組成物、レジストパターン形成方法、レジスト用永久膜、感放射線性組成物、アモルファス膜の製造方法、リソグラフィー用下層膜形成材料、リソグラフィー用下層膜形成用組成物、リソグラフィー用下層膜の製造方法及び回路パターン形成方法 |
US16/625,387 US20200157060A1 (en) | 2017-06-28 | 2018-06-25 | Film forming material, composition for film formation for lithography, material for optical component formation, resist composition, resist pattern formation method, permanent film for resist, radiation-sensitive composition, method for producing amorphous film, underlayer film forming material for lithography, composition for underlayer film formation for lithography, method for producing underlayer film for lithography, and circuit pattern formation method |
KR1020197037934A KR20200022391A (ko) | 2017-06-28 | 2018-06-25 | 막형성재료, 리소그래피용 막형성용 조성물, 광학부품 형성용 재료, 레지스트 조성물, 레지스트패턴 형성방법, 레지스트용 영구막, 감방사선성 조성물, 아몰퍼스막의 제조방법, 리소그래피용 하층막 형성재료, 리소그래피용 하층막 형성용 조성물, 리소그래피용 하층막의 제조방법 및 회로패턴 형성방법 |
CN201880042266.9A CN110856451A (zh) | 2017-06-28 | 2018-06-25 | 膜形成材料、光刻用膜形成用组合物、光学部件形成用材料、抗蚀剂组合物、抗蚀图案形成方法、抗蚀剂用永久膜、辐射敏感组合物、非晶膜的制造方法、光刻用下层膜形成材料、光刻用下层膜形成用组合物、光刻用下层膜的制造方法及电路图案形成方法 |
EP18825432.0A EP3647869A4 (en) | 2017-06-28 | 2018-06-25 | MOVIE MATERIAL lithographic FILM FORMING COMPOSITION, OPTICAL COMPONENTS FORMING MATERIAL, RESIST COMPOSITION, RESIST STRUCTURE PRODUCTION PROCESS, RESIST LENGTH FILM, RADIATION SENSITIVE COMPOSITION, METHOD OF FORMING AN AMORPHOUS FILMS, MATERIAL FOR FORMING A lithographic LAYER FILMS, PROCESS FOR PRODUCING A lithographic LAYER FILMS AND METHOD FOR CIRCUIT PATTERN FORMATION |
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EP (1) | EP3647869A4 (ja) |
JP (1) | JP7252516B2 (ja) |
KR (1) | KR20200022391A (ja) |
CN (1) | CN110856451A (ja) |
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EP3647869A1 (en) | 2020-05-06 |
TW201920125A (zh) | 2019-06-01 |
EP3647869A4 (en) | 2020-09-02 |
JP7252516B2 (ja) | 2023-04-05 |
US20200157060A1 (en) | 2020-05-21 |
CN110856451A (zh) | 2020-02-28 |
KR20200022391A (ko) | 2020-03-03 |
JPWO2019004142A1 (ja) | 2020-07-02 |
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