WO2022107759A1 - レジスト下層膜形成組成物 - Google Patents
レジスト下層膜形成組成物 Download PDFInfo
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- WO2022107759A1 WO2022107759A1 PCT/JP2021/042066 JP2021042066W WO2022107759A1 WO 2022107759 A1 WO2022107759 A1 WO 2022107759A1 JP 2021042066 W JP2021042066 W JP 2021042066W WO 2022107759 A1 WO2022107759 A1 WO 2022107759A1
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- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- YFSUTJLHUFNCNZ-UHFFFAOYSA-N perfluorooctane-1-sulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F YFSUTJLHUFNCNZ-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 229960005323 phenoxyethanol Drugs 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 150000003021 phthalic acid derivatives Chemical class 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 1
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 1
- 239000000249 polyoxyethylene sorbitan monopalmitate Substances 0.000 description 1
- 235000010483 polyoxyethylene sorbitan monopalmitate Nutrition 0.000 description 1
- 239000001818 polyoxyethylene sorbitan monostearate Substances 0.000 description 1
- 235000010989 polyoxyethylene sorbitan monostearate Nutrition 0.000 description 1
- 239000001816 polyoxyethylene sorbitan tristearate Substances 0.000 description 1
- 235000010988 polyoxyethylene sorbitan tristearate Nutrition 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 125000001844 prenyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229940116423 propylene glycol diacetate Drugs 0.000 description 1
- HBCQSNAFLVXVAY-UHFFFAOYSA-N pyrimidine-2-thiol Chemical compound SC1=NC=CC=N1 HBCQSNAFLVXVAY-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- JWVCLYRUEFBMGU-UHFFFAOYSA-N quinazoline Chemical compound N1=CN=CC2=CC=CC=C21 JWVCLYRUEFBMGU-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000006254 rheological additive Substances 0.000 description 1
- 239000012487 rinsing solution Substances 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229940100515 sorbitan Drugs 0.000 description 1
- 229940035044 sorbitan monolaurate Drugs 0.000 description 1
- 239000001593 sorbitan monooleate Substances 0.000 description 1
- 235000011069 sorbitan monooleate Nutrition 0.000 description 1
- 229940035049 sorbitan monooleate Drugs 0.000 description 1
- 239000001570 sorbitan monopalmitate Substances 0.000 description 1
- 235000011071 sorbitan monopalmitate Nutrition 0.000 description 1
- 229940031953 sorbitan monopalmitate Drugs 0.000 description 1
- 239000001587 sorbitan monostearate Substances 0.000 description 1
- 235000011076 sorbitan monostearate Nutrition 0.000 description 1
- 229940035048 sorbitan monostearate Drugs 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229960002317 succinimide Drugs 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229940072958 tetrahydrofurfuryl oleate Drugs 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- ZEMGGZBWXRYJHK-UHFFFAOYSA-N thiouracil Chemical compound O=C1C=CNC(=S)N1 ZEMGGZBWXRYJHK-UHFFFAOYSA-N 0.000 description 1
- 229950000329 thiouracil Drugs 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- TVJIJCPNBAPRRJ-UHFFFAOYSA-N trichlorosilylmethanol Chemical compound OC[Si](Cl)(Cl)Cl TVJIJCPNBAPRRJ-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- 125000005951 trifluoromethanesulfonyloxy group Chemical group 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols
- C08G65/40—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
- C08G65/4012—Other compound (II) containing a ketone group, e.g. X-Ar-C(=O)-Ar-X for polyetherketones
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/091—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by antireflection means or light filtering or absorbing means, e.g. anti-halation, contrast enhancement
-
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- 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
- H01L21/0274—Photolithographic processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G2650/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterized by the type of post-polymerisation functionalisation
- C08G2650/20—Cross-linking
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
- C08G2650/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing oxygen in addition to the ether group
- C08G2650/40—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing oxygen in addition to the ether group containing ketone groups, e.g. polyarylethylketones, PEEK or PEK
Definitions
- the present invention relates to a resist underlayer film forming composition, a resist underlayer film which is a fired product of a coating film made of the composition, and a method for manufacturing a semiconductor device using the composition.
- microfabrication is performed by the lithography process.
- the lithography process when the resist layer on the substrate is exposed to an ultraviolet laser such as a KrF excimer laser or ArF excimer laser, the effect of a standing wave generated due to the reflection of the ultraviolet laser on the substrate surface is desired. It is known that a resist pattern having a shape is not formed. In order to solve this problem, it is adopted to provide a resist underlayer film (antireflection film) between the substrate and the resist layer. It is known that a novolak resin is used as a composition for forming a resist underlayer film.
- a lithography process is also known in which at least two resist underlayer films are formed and the resist underlayer film is used as a mask material in order to reduce the thickness of the resist layer required with the miniaturization of the resist pattern.
- the material forming the at least two layers include an organic resin (for example, acrylic resin and novolak resin), a silicon resin (for example, organopolysiloxane), and an inorganic silicon compound (for example, SiON and SiO 2 ).
- an organic resin for example, acrylic resin and novolak resin
- a silicon resin for example, organopolysiloxane
- an inorganic silicon compound for example, SiON and SiO 2 .
- composition for forming such a resist underlayer film for example, in Patent Document 1, the following formula (1):
- X 1 represents a divalent organic group having 6 to 20 carbon atoms and having at least one aromatic ring optionally substituted with a halogeno group, a nitro group, an amino group or a hydroxy group
- X 2 Represents an organic group or a methoxy group having at least one aromatic ring optionally substituted with a halogeno group, a nitro group, an amino group or a hydroxy group and having 6 to 20 carbon atoms.
- the conventional resist underlayer film forming composition cannot be self-cured at a low temperature without an acid catalyst or a cross-linking agent, a sublimate that contaminates the apparatus is generated, and a high hardness film having high bending resistance is obtained. I was dissatisfied with the fact that I could't do it. Therefore, it has been required to improve the above-mentioned points while maintaining the characteristics such as not elution with the resist solvent and obtaining desired optical constants and etching resistance.
- the present invention solves the above problems. That is, the present invention includes the following.
- An aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof) and an aromatic compound B having a carbon atom number of 120 or less different from A are A polymer (X) containing a repeating structural unit in which 1 to 6 Bs are bonded to one A, which is a repeating structural unit alternately bonded via a linking group —O—, and a resist containing a solvent.
- Underlayer film forming composition [2] The resist underlayer film forming composition according to [1], wherein the polymer (X) contains a repeating structural unit represented by the formula (1).
- a 1 represents an organic group derived from an aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof), and B 1 is A 1 .
- R is a monovalent organic group, a hydrogen atom or a mixture thereof
- B 1 is A 1 .
- a saturated or unsaturated linear chain in which R in the formula (1) may be substituted with a phenyl group, a naphthyl group or an anthrasenyl group, and may be interrupted by an oxygen atom, a nitrogen atom or a carbonyl group.
- the resist underlayer film forming composition according to [2] which is a branched C2 - C20 aliphatic or C3 - C20 alicyclic hydrocarbon group, a hydrogen atom, or a mixture thereof.
- C 1 and C 2 independently have an aromatic ring having 6 to 48 carbon atoms which may contain a heteroatom having 6 to 48 carbon atoms, or an aromatic ring having 6 to 48 carbon atoms which may contain a heteroatom.
- Represents a hydrocarbon group containing a group ring Y represents a single bond, a carbonyl group, a sulfonyl group, a -CR 12- group, or a- (CF 3 ) C (CF 3 ) -group .
- R 1 may be interrupted by an oxygen atom, a carbonyl group, a nitrogen atom, a carbon carbon double bond, or a carbon carbon triple bond, and a carbon carbon double bond or a carbon carbon triple bond may be bonded to the end.
- R 2 may be interrupted by a carbon-carbon double bond or a carbon-carbon triple bond, and may be a chain having 1 to 10 carbon atoms to which a carbon-carbon double bond or a carbon-carbon triple bond may be bonded to the end. Or represents a cyclic alkyl group, i is 0 or 1 and The dotted line represents the bond with the oxygen atom.
- i in the formula (2) is 1.
- X further contains a repeating structural unit represented by the formula (3).
- B 1 is represented by the above formula 2, and A 2 represents an organic group derived from an aromatic compound A'with 120 or less carbon atoms, which is different from B 1 ).
- a 2 represents an organic group derived from an aromatic compound A'with 120 or less carbon atoms, which is different from B 1 ).
- the resist underlayer film forming composition according to any one of [2] to [6], wherein A1 in the formula ( 1 ) does not have a phenolic hydroxyl group.
- the polymer (X) has an aromatic hydrocarbon group having 6 to 30 carbon atoms which may be substituted at at least one end. Resist underlayer film forming composition.
- a resist underlayer film which is a fired product of a coating film comprising the composition according to any one of [1] to [13].
- a method for manufacturing a semiconductor device which comprises a step of etching and patterning the resist underlayer film through a formed resist pattern, and a step of processing a semiconductor substrate through the patterned resist underlayer film.
- the process of forming a hard mask on the formed resist underlayer film The process of forming a resist film on the formed hard mask, A step of forming a resist pattern by irradiating and developing a formed resist film with light or an electron beam.
- a step of etching and patterning the hard mask through a formed resist pattern a step of etching and patterning the resist underlayer film through a patterned hard mask, and a patterned resist underlayer.
- a method for manufacturing a semiconductor device which comprises a step of processing a semiconductor substrate through a film. [17] The method for manufacturing a semiconductor device according to [15] or [16], wherein the step of forming a resist underlayer film is performed by a nanoimprint method.
- the present invention it is possible to meet the demands of self-curing at a low temperature without containing an acid catalyst or a cross-linking agent, reducing the amount of sublimates, and obtaining a high-hardness film having high bending resistance, and a cross-linking agent.
- a cross-linking agent When used as a cross-linking agent, it exhibits higher flattening and higher heat resistance than conventional cross-linking agents, and has the same embedding property as conventional products.
- a novel resist underlayer film forming composition that can be modified is provided.
- the resist underlayer film forming composition according to the present invention contains an aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof), and 120 carbon atoms different from A.
- the following aromatic compound B is a repeating structural unit to which the following aromatic compound B is alternately bonded via a linking group —O—, and is a polymer containing a repeating structural unit in which 1 to 6 B are bonded to one A.
- (X) and a solvent are included.
- the polymer (X) is an aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof), and an aromatic compound B having a carbon atom number of 120 or less, which is different from A.
- R is a monovalent organic group, a hydrogen atom or a mixture thereof
- B having a carbon atom number of 120 or less, which is different from A.
- the polymer (X) comprises a repeating structural unit represented by the formula (1).
- a 1 represents an organic group derived from an aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof), and B 1 is A 1 .
- R is a monovalent organic group, a hydrogen atom or a mixture thereof
- B 1 is A 1 .
- the polymer (X) further comprises a repeating structural unit represented by the formula (3).
- B 1 is represented by the above formula 2
- a 2 represents an organic group derived from an aromatic compound A'with 120 or less carbon atoms, which is different from B 1 ).
- the monovalent organic group R may preferably be substituted with a phenyl group, a naphthyl group or an anthrasenyl group and may be interrupted by an oxygen atom, a nitrogen atom or a carbonyl group, saturated or unsaturated.
- “Mixed” means that a plurality of ROCH 2 -groups present in a single structural unit may be different, and the ROCH 2 -groups in each of two or more structural units are different. It also means good.
- the typical saturated aliphatic hydrocarbon group is a linear or branched alkyl group having 2 to 20 carbon atoms, for example, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, and the like.
- a cyclic alkyl group can also be used.
- a typical unsaturated aliphatic hydrocarbon group is an alkenyl group having 2 to 20 carbon atoms, for example, an ethenyl group, a 1-propenyl group, a 2-propenyl group, a 1-methyl-1-ethenyl group, and a 1-butenyl group.
- R is -H, -CH 3 groups, -CH 2 CH 3 groups, -CH 2 CH 2 CH 3 groups, -CH 2 CH 2 CH 2 CH 3 groups, cyclohexyl group, and -CH (CH 3 ). ) CH 2 OCH 3 units.
- B 1 in the formula (1) is preferably represented by the following formula 2.
- C 1 and C 2 independently have an aromatic ring having 6 to 48 carbon atoms which may contain a heteroatom having 6 to 48 carbon atoms, or an aromatic ring having 6 to 48 carbon atoms which may contain a heteroatom.
- Represents a hydrocarbon group containing a group ring Y represents a single bond, a carbonyl group, a sulfonyl group, a -CR 12- group, or a- (CF 3 ) C (CF 3 ) -group .
- R 1 may be interrupted by an oxygen atom, a carbonyl group, a nitrogen atom, a carbon carbon double bond, or a carbon carbon triple bond, and a carbon carbon double bond or a carbon carbon triple bond may be bonded to the end.
- R 2 may be interrupted by a carbon-carbon double bond or a carbon-carbon triple bond, and may be a chain having 1 to 10 carbon atoms to which a carbon-carbon double bond or a carbon-carbon triple bond may be bonded to the end.
- C 1 and C 2 each independently have an electron-withdrawing substituent on the aromatic ring.
- the electron-withdrawing substituent is not particularly limited, and examples thereof include a cyano group, a ketone group, a nitro group, an aldehyde group, a carboxyl group, and an ester group.
- i in the formula (2) is 1.
- the polymer (X) is an aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof), and an aromatic compound B having 120 or less carbon atoms, which is different from A. And, if necessary, a compound containing a functional group as a linking group (eg, aldehyde, ketone, ROCH 2 -Ar-CH 2 OR (R is a monovalent organic group, a hydrogen atom or a mixture thereof)).
- R is a monovalent organic group, a hydrogen atom or a mixture thereof
- an aromatic compound A' with a carbon atom number of 120 or less, which is different from B 1 , a base catalyst (eg, sodium hydroxide, potassium hydroxide, potassium carbonate, trimethylamine, triethylamine, etc.) is present. It can be synthesized by subjecting it to a polymerization reaction below.
- a base catalyst eg, sodium hydroxide, potassium hydroxide, potassium carbonate, trimethylamine, triethylamine, etc.
- the aromatic compound A having a ROCH 2 -group (R is a monovalent organic group, a hydrogen atom or a mixture thereof) used for the synthesis of the polymer (X) is preferably an aromatic compound having 120 or less carbon atoms. It is a compound.
- Aromatic compound A is subject to having a ROCH 2 -group.
- (C) Heterocyclic compounds such as furan, pyrrole, thiophene, pyridine, carbazole, iminostylben, phenothiazine, indole and indolocarbazole may be used.
- (D) Aromatic rings (a) to (c) are single-bonded, such as biphenyl, phenylindole, ⁇ , ⁇ , ⁇ ', ⁇ '-tetrakis (4-hydroxyphenyl) -p-xylene, and calix allene. It may be a compound bonded with an alkylene group.
- aromatic compound A examples include, but are not limited to, benzene, biphenyl, 2,2-diphenylpropane, thiophene, furan, pyridine, pyrimidine, and pyrazine, provided that they have a ROCH 2 -group. , Pyrrole, oxazole, thiazole, imidazole, naphthalene, anthracene, quinoline, carbazole, quinazoline, purine, indole, benzothiophene, benzofuran, indole, phenylindole, aclysine, fluorene and the like.
- aromatic compound A examples include compounds having a fluorene or fluorenone skeleton as exemplified below.
- the aromatic compound A as a starting material for the polymer (X) may have a phenolic hydroxyl group, but it is preferable that A1 in the formula ( 1 ) does not have a phenolic hydroxyl group.
- “having no phenolic hydroxyl group” means that the amount of phenolic hydroxyl group is below the lower limit of detection when measured by an analytical means such as NMR, or even if it is detected, it is at most a trace amount.
- the aromatic compound B is an aromatic compound having 120 or less carbon atoms, provided that it is different from the aromatic compound A, and the aromatic compound is the same as the description for the aromatic compound A.
- the aromatic compound B preferably has a halogen on the aromatic ring, more preferably has two or more halogens, and the halogen is preferably fluorine.
- aromatic compound B examples include, but are not limited to, 2,5-difluorotoluene, 2,5-difluoroaniline, 2,5-difluorophenol, 1,2,3-trifluorobenzene, 2 , 5-Difluorobenzonitrile, 2,5-difluorobenzaldehyde, 2,5,-difluorobenzylamine, 2,5-difluorobenzyl alcohol, 2,5-difluoroanisole, 2,3,6-trifluorophenol, 2, 5-Difluorobenzyl cyanide, 4-amino-2,5-difluorobenzonitrile, 2,5-difluorophenyl isocyanate, 2,5-difluoroacetophenone, 2,3,5-trifluorobenzonitrile, 2,4,5 -Trifluorobenzonitrile, 2,5-difluorobenzoic acid, 2,5-difluoronitrobenzene, 2,4,5-trifluoro
- the aromatic compound A' is an aromatic compound having 120 or less carbon atoms on condition that an organic group different from that of B 1 is induced, and the aromatic compound is the same as the description for the above aromatic compound A. be.
- Examples of the aromatic compound A' are, but are not limited to, hydroquinone, resorcinol, catechol, fluoroglucolcinol, 2,6-dihydroxynaphthalene, 3,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 1,2-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 1,3-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 4,4-biphenol, 4,4', 4''- Trihydroxytriphenylmethane, calix allen, bisphenol A, bisphenol AP, bisphenol AF, bisphenol B, bisphenol BP, bisphenol C, bisphenol E, bisphenol F, bisphenol G
- the compound used for the synthesis of the polymer (X) is not limited to one kind of compound, and two or more kinds of compounds may be used in combination. Therefore, the repeating structural unit in which the aromatic compound A having a ROCH 2 -group and the aromatic compound B having a carbon atom number of 120 or less different from A are alternately bonded via the linking group -O- is the same. It may or may not be different.
- the polymer (X) can have at least one terminal an aromatic hydrocarbon group having 6 to 30 carbon atoms which may be substituted.
- aromatic hydrocarbon groups include phenyl groups and naphthyl groups which may be substituted with vinyl groups and the like.
- the aromatic compound A, the aromatic compound B, and optionally the aromatic compound A' are alternately bonded via the linking group —O— to form a repeating structural unit.
- the aromatic compound A, the aromatic compound B, and optionally the aromatic compound A' are alternately bonded via the linking group —O— to form a repeating structural unit.
- the weight average molecular weight of the polymer (X) contained in the resist underlayer film forming composition of the present invention is not particularly limited. In terms of standard polystyrene conversion value, for example, it is 500 or more, for example 1,000 or more, for example 2,000 or more, for example 500,000 or less, and for example 100,000 or less.
- the resist underlayer film forming composition of the present invention can be prepared by dissolving each of the above components in an appropriate solvent, and is used in a uniform solution state.
- Such solvents include, for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol, propylene glycol monomethyl ether, propylene glycol monopropyl ether, propylene glycol monomethyl ether acetate, propylene glycol.
- a high boiling point solvent having a boiling point of 180 ° C. or higher can be used.
- the high boiling point organic solvent include 1-octanol, 2-ethylhexanol, 1-nonanol, 1-decanol, 1-undecanol, ethylene glycol, 1,2-propylene glycol, 1,3-butylene glycol, 2, 4-Pentindiol, 2-Methyl-2,4-Pentanediol, 2,5-hexanediol, 2,4-Heptanediol, 2-ethyl-1,3-hexanediol, diethylene glycol, dipropylene glycol, triethylene glycol , Tripropylene glycol, glycerin, n-nonyl acetate, ethylene glycol monohexyl ether, ethylene glycol mono-2-ethylhexyl ether, ethylene glycol monophenyl ether, ethylene glycol monobenzyl
- the proportion of the solid content obtained by removing the organic solvent from the composition is, for example, 0.5% by mass to 30% by mass, preferably 0.8% by mass to 15% by mass.
- R 1 , R 2 and R 3 in the formula (i) represent an alkyl group having 1 to 20 carbon atoms which may be interrupted by a hydrogen atom, an oxygen atom, a sulfur atom or an amide bond, respectively, and are identical to each other. They may be present or different, and may be combined with each other to form a ring structure.
- alkyl group having 1 to 20 carbon atoms examples include a linear or branched alkyl group having or not having a substituent, for example, a methyl group, an ethyl group, and an n-propyl group.
- a substituent for example, a methyl group, an ethyl group, and an n-propyl group.
- An alkyl group having 1 to 12 carbon atoms is preferable, an alkyl group having 1 to 8 carbon atoms is more preferable, and an alkyl group having 1 to 4 carbon atoms is more preferable.
- Alkyl groups having 1 to 20 carbon atoms interrupted by oxygen atoms, sulfur atoms or amide bonds include, for example, structural units -CH 2 -O-, -CH 2-S-, -CH 2 - NHCO- or-. Examples thereof include those containing CH 2 -CONH-. -O-, -S-, -NHCO- or -CONH- may be one unit or two or more units in the alkyl group.
- Specific examples of alkyl groups having 1 to 20 carbon atoms interrupted by -O-, -S-, -NHCO- or -CONH- units include methoxy group, ethoxy group, propoxy group, butoxy group, methylthio group and ethylthio.
- methyl group an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, a dodecyl group or an octadecyl group, each of which is a methoxy group or an ethoxy group.
- the compound represented by the above is preferable, and 3-methoxy-N, N-dimethylpropionamide and N, N-dimethylisobutyramide are particularly preferable as the compound represented by the formula (i).
- solvents can be used alone or in combination of two or more.
- these solvents those having a boiling point of 160 ° C. or higher are preferable, and propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, ethyl lactate, butyl lactate, cyclohexanone, 3-methoxy-N, N-dimethylpropionamide, N, N-Dimethylisobutyramide, 2,5-dimethylhexane-1,6-diyldiacetate (DAH; cas, 89182-68-3), 1,6-diacetoxyhexane (cas, 6222-17-9), etc.
- DASH 2,5-dimethylhexane-1,6-diyldiacetate
- DAIH 1,6-diacetoxyhexane
- cas, 6222-17-9 1,6-diacetoxyhexane
- the resist underlayer film forming composition of the present invention may further contain at least one of a cross-linking agent, an acid and / or an acid generator, a thermoacid generator and a surfactant as optional components.
- the resist underlayer film forming composition of the present invention can further contain a cross-linking agent.
- a cross-linking agent a cross-linking compound having at least two cross-linking substituents is preferably used.
- a melamine-based compound, a substituted urea-based compound and a phenol-based compound having a cross-linking substituent such as a methylol group or a methoxymethyl group, or a polymer system thereof and the like can be mentioned.
- the substituted urea-based compound is compounds such as methoxymethylated urea, butoxymethylated urea, and methoxymethylated thiourea, and examples thereof include tetramethoxymethylurea and tetrabutoxymethylurea.
- a condensate of these compounds can also be used.
- the phenolic compound include tetrahydroxymethylbiphenol, tetramethoxymethylbiphenol, tetrahydroxymethylbisphenol, tetramethoxymethylbisphenol, and compounds represented by the following formulas.
- a compound having at least two epoxy groups can also be used.
- examples of such compounds include tris (2,3-epoxypropyl) isocyanurate, 1,4-butanediol diglycidyl ether, 1,2-epoxy-4- (epoxyethyl) cyclohexane, glycerol triglycidyl ether, and diethylene glycol.
- Examples include 200, 400, 7015, 835LV, and 850CRP.
- an epoxy resin having an amino group can also be used.
- Examples of such an epoxy resin include YH-434 and YH-434L (manufactured by Shin-Nippon Epoxy Manufacturing Co., Ltd.).
- a compound having at least two blocked isocyanate groups can also be used.
- examples of such a compound include Takenate [registered trademark] B-830 and B-870N manufactured by Mitsui Chemicals, Inc., and VESTANAT [registered trademark] B1358 / 100 manufactured by Evonik Degussa.
- a compound having at least two vinyl ether groups can also be used.
- examples of such compounds include bis (4- (vinyloxymethyl) cyclohexylmethyl) glutarate, tri (ethylene glycol) divinyl ether, adipate divinyl ester, diethylene glycol divinyl ether, 1,2,4-tris (4-vinyl).
- a cross-linking agent having high heat resistance can be used.
- a compound containing a cross-linking substituent having an aromatic ring (for example, a benzene ring or a naphthalene ring) in the molecule can be preferably used.
- Examples of this compound include a compound having a partial structure of the following formula (4) and a polymer or oligomer having a repeating unit of the following formula (5).
- the above R 11 , R 12 , R 13 and R 14 are hydrogen atoms or alkyl groups having 1 to 10 carbon atoms, and these alkyl groups can use the above-mentioned examples.
- the above compounds can be obtained as products of Asahi Organic Materials Industry Co., Ltd. and Honshu Chemical Industry Co., Ltd.
- the compound of the formula (4-23) is Honshu Chemical Industry Co., Ltd., trade name TMOM-BP
- the compound of the formula (4-24) is Asahi Organic Material Industry Co., Ltd., trade name TM. -Available as BIP-A.
- the amount of the cross-linking agent added varies depending on the coating solvent used, the substrate used, the required solution viscosity, the required film shape, etc., but is 0.001% by mass or more and 0.01% by mass with respect to the total solid content.
- cross-linking agents may cause a cross-linking reaction by self-condensation, but if cross-linking substituents are present in the polymer of the present invention, they can cause a cross-linking reaction with those cross-linking substituents.
- One kind selected from these various cross-linking agents may be added, or two or more kinds may be added in combination.
- the resist underlayer film forming composition according to the present invention may contain an acid and / or a salt thereof and / or an acid generator.
- Examples of the acid include methanesulfonic acid, p-toluenesulfonic acid, trifluoromethanesulfonic acid, salicylic acid, 5-sulfosalicylic acid, 4-phenolsulfonic acid, camphorsulfonic acid, 4-chlorobenzenesulfonic acid, benzenedisulfonic acid, 1-naphthalene.
- Examples thereof include carboxylic acid compounds such as sulfonic acid, citric acid, benzoic acid, hydroxybenzoic acid and naphthalene carboxylic acid, and inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid.
- the salt the above-mentioned acid salt can also be used.
- the salt is not limited, but an ammonia derivative salt such as a trimethylamine salt or a triethylamine salt, a pyridine derivative salt, a morpholin derivative salt and the like can be preferably used.
- the acid and / or its salt can be used alone or in combination of two or more.
- the blending amount is usually 0.0001 to 20% by mass, preferably 0.0005 to 10% by mass, and more preferably 0.01 to 5% by mass with respect to the total solid content.
- Examples of the acid generator include a thermal acid generator and a photoacid generator.
- Examples of the thermoacid generator include 2,4,4,6-tetrabromocyclohexadienone, benzointosylate, 2-nitrobenzyltosylate, K-PURE® CXC-1612, CXC-1614, and TAG.
- the photoacid generator produces an acid when the resist is exposed. Therefore, the acidity of the underlayer film can be adjusted. This is a method for adjusting the acidity of the lower layer film to the acidity of the upper layer resist. Further, by adjusting the acidity of the lower layer film, the pattern shape of the resist formed on the upper layer can be adjusted.
- the photoacid generator contained in the resist underlayer film forming composition of the present invention include onium salt compounds, sulfoneimide compounds, disulfonyldiazomethane compounds and the like.
- onium salt compounds include diphenyliodonium hexafluorophosphate, diphenyliodonium trifluoromethanesulfonate, diphenyliodonium nonafluoronormal butane sulfonate, diphenyliodonium perfluoronormal octane sulfonate, diphenyliodonium camphor sulfonate, and bis (4-tert-butylphenyl) iodonium camphor.
- Iodonium salt compounds such as sulfonate and bis (4-tert-butylphenyl) iodonium trifluoromethane sulfonate, and triphenyl sulfonium hexafluoroantimonate, triphenyl sulfonium nonafluoronormal butane sulfonate, triphenyl sulfonium camphor sulfonate and triphenyl sulfonium trifluoromethane.
- Examples thereof include sulfonium salt compounds such as sulfonate.
- sulfoneimide compound examples include N- (trifluoromethanesulfonyloxy) succinimide, N- (nonafluoronormalbutanesulfonyloxy) succinimide, N- (kanfersulfonyloxy) succinimide and N- (trifluoromethanesulfonyloxy) naphthalimide. Can be mentioned.
- disulfonyl diazomethane compound examples include bis (trifluoromethylsulfonyl) diazomethane, bis (cyclohexylsulfonyl) diazomethane, bis (phenylsulfonyl) diazomethane, bis (p-toluenesulfonyl) diazomethane, and bis (2,4-dimethylbenzenesulfonyl).
- Diazomethane methylsulfonyl-p-toluenesulfonyldiazomethane and the like.
- the ratio thereof is 0.01 to 10 parts by mass, 0.1 to 8 parts by mass, or 0. to 100 parts by mass with respect to 100 parts by mass of the solid content of the resist underlayer film forming composition. It is 5 to 5 parts by mass.
- the resist underlayer film forming composition of the present invention can further contain a surfactant.
- a surfactant include polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, and polyoxyethylene oleyl ether, polyoxyethylene octylphenyl ether, and polyoxy.
- Polyoxyethylene alkylaryl ethers such as ethylene nonylphenyl ether, polyoxyethylene / polyoxypropylene block copolymers, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, sorbitan Solbitan fatty acid esters such as tristearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan tristearate, etc.
- Nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters, Ftop [registered trademarks] EF301, EF303, EF352 (manufactured by Mitsubishi Materials Electronics Chemicals Co., Ltd.), Megafuck [registered trademarks] F171, F173, R-30, R-30-N, R-40, R-40-LM (manufactured by DIC Co., Ltd.), Florard FC430, FC431 (manufactured by Sumitomo 3M Co., Ltd.), Asahi Guard [registered trademark] ] AG710, Surflon [registered trademark] S-382, SC101, SC102, SC103, SC104, SC105, SC106 (manufactured by Asahi Glass Co., Ltd.) and other fluorine-based surfactants, organosiloxane polymer KP341 (Shinetsu) (Made by Chemical Industry Co., Ltd.) can be mentioned.
- Ftop EF
- One kind selected from these surfactants may be added, or two or more kinds may be added in combination.
- the content ratio of the surfactant is, for example, 0.01% by mass to 5% by mass with respect to the solid content obtained by removing the solvent described later from the resist underlayer film forming composition of the present invention.
- the polymer (X) according to the present invention can also be used as a cross-linking agent for the membrane material (Z). That is, the resist underlayer film forming composition according to the present invention further contains a film material (Z) capable of a cross-linking reaction with the polymer (X). It can be said that the membrane material (Z) is a membrane material capable of cross-linking with the polymer (X).
- the membrane material (Z) arbitrarily used in the present invention can be used without particular limitation as long as it is a material capable of cross-linking with the polymer (X).
- the membrane material may be a polymer, an oligomer, or a small molecule compound having a molecular weight of 1,000 or less.
- Examples of the crosslink-forming group present in the film material include, but are not limited to, a hydroxy group, a carboxyl group, an amino group, and an alkoxy group.
- membrane materials (a) to (z) disclosed in the [Membrane Material (Y)] section of WO2021 / 172295 Japanese Patent Application No. 2020-033333
- Japanese Patent Application No. 2020-033333 Japanese Patent Application No. 2020-033333
- the membrane material (Z) capable of a cross-linking reaction is preferably used.
- the content ratio of the crosslinkable film material (Z) is the total solid content. It is usually 1 to 99.9% by mass, preferably 50 to 99.9% by mass, more preferably 50 to 95% by mass, and further preferably 50 to 90% by mass.
- An absorbance agent, a rheology adjuster, an adhesion auxiliary agent, or the like can be further added to the resist underlayer film forming composition of the present invention.
- Rheology modifiers are effective in improving the fluidity of the underlayer film forming composition.
- Adhesive aids are effective in improving the adhesion between the semiconductor substrate or resist and the underlayer film.
- absorbent examples include commercially available absorbents described in "Technology and Market of Industrial Dyes” (CMC Publishing) and “Dye Handbook” (edited by the Society of Synthetic Organic Chemistry), for example, C.I. I. Disperse Yellow 1,3,4,5,7,8,13,23,31,49,50,51,54,60,64,66,68,79,82,88,90,93,102,114 and 124; C.I. I. Disperse Orange 1,5,13,25,29,30,31,44,57,72 and 73; C.I. I.
- the above-mentioned absorbent is usually blended in a proportion of 10% by mass or less, preferably 5% by mass or less, based on the total solid content of the resist underlayer film forming composition.
- the rheology adjuster mainly improves the fluidity of the resist underlayer film forming composition, and particularly improves the film thickness uniformity of the resist underlayer film and the filling property of the resist underlayer film forming composition into the hole in the baking step. Added for the purpose of enhancing.
- phthalic acid derivatives such as dimethylphthalate, diethylphthalate, diisobutylphthalate, dihexylphthalate and butylisodecylphthalate
- adipic acid derivatives such as dinormal butyl adipate, diisobutyl adipate, diisooctyl adipate and octyldecyl adipate, and didipic acid.
- Examples include maleic acid derivatives such as normal butylmalate, diethylmalate, and dinonylmalate, oleic acid derivatives such as methyl olate, butyl olate, and tetrahydrofurfuryl oleate, and stearic acid derivatives such as normal butyl stearate and glyceryl stearate.
- rheology adjusters are usually blended in a proportion of less than 30% by mass with respect to the total solid content of the resist underlayer film forming composition.
- the adhesive auxiliary is mainly added for the purpose of improving the adhesion between the substrate or the resist and the resist underlayer film forming composition, and particularly for preventing the resist from peeling off during development.
- Specific examples include chlorosilanes such as trimethylchlorosilane, dimethylmethylolchlorosilane, methyldiphenylchlorosilane, and chloromethyldimethylchlorosilane, trimethylmethoxysilane, dimethyldiethoxysilane, methyldimethoxysilane, dimethylmethylolethoxysilane, diphenyldimethoxysilane, and fu.
- Alkoxysilanes such as enyltriethoxysilane, hexamethyldisilazane, N, N'-bis (trimethylsilyl) urea, dimethyltrimethylsilylamine, thyrazane such as trimethylsilylimidazole, methyloltrichlorosilane, ⁇ -chloropropyltrimethoxysilane, ⁇ -Silanes such as aminopropyltriethoxysilane and ⁇ -glycidoxypropyltrimethoxysilane, benzotriazole, benzimidazole, indazole, imidazole, 2-mercaptobenzimidazole, 2-mercaptobenzothiazole, 2-mercaptobenzoxazole, urasol , A heterocyclic compound such as thiouracil, mercaptoimidazole, mercaptopyrimidine, urea such as 1,1-dimethylurea and 1,3-dimethyl
- the solid content of the resist underlayer film forming composition according to the present invention is usually 0.1 to 70% by mass, preferably 0.1 to 60% by mass.
- the solid content is the content ratio of all the components excluding the solvent from the resist underlayer film forming composition.
- the proportion of the polymer in the solid content is preferably 1 to 100% by mass, 1 to 99.9% by mass, 50 to 99.9% by mass, 50 to 95% by mass, and 50 to 90% by mass in this order.
- One of the scales for evaluating whether or not the resist underlayer film forming composition is in a uniform solution state is to observe the passability of a specific microfilter, but the resist underlayer film forming composition according to the present invention is used. It passes through a microfilter having a pore size of 0.1 ⁇ m and exhibits a uniform solution state.
- microfilter material examples include fluororesins such as PTFE (polytetrafluoroethylene) and PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), PE (polyethylene), UPE (ultra high molecular weight polyethylene), and PP ( (Polypropylene), PSF (polysulphon), PES (polyethersulfone), nylon, and the like, preferably made of PTFE (polytetrafluoroethylene).
- fluororesins such as PTFE (polytetrafluoroethylene) and PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer)
- PE polyethylene
- UPE ultra high molecular weight polyethylene
- PP polypropylene
- PSF polysulphon
- PES polyethersulfone
- nylon and the like, preferably made of PTFE (polytetrafluoroethylene).
- the resist underlayer film can be formed as follows by using the resist underlayer film forming composition according to the present invention.
- Substrates used in the manufacture of semiconductor devices eg, silicon wafer substrate, silicon dioxide coated substrate (SiO 2 substrate), silicon nitride substrate (SiN substrate), silicon nitride oxide substrate (SiON substrate), titanium nitride substrate (TiN)
- the present invention is applied by an appropriate coating method such as a spinner or a coater on a substrate), a tungsten substrate (W substrate), a glass substrate, an ITO substrate, a polyimide substrate, a low dielectric constant material (low-k material) coated substrate, etc.).
- the resist underlayer film forming composition is applied and then fired using a heating means such as a hot plate to form a resist underlayer film.
- the firing conditions are appropriately selected from a firing temperature of 80 ° C. to 600 ° C. and a firing time of 0.3 to 60 minutes.
- the firing temperature is 150 ° C. to 350 ° C. and the firing time is 0.5 to 2 minutes.
- Air may be used as the atmospheric gas at the time of firing, or an inert gas such as nitrogen or argon may be used.
- the film thickness of the underlying film formed is, for example, 10 to 1000 nm, 20 to 500 nm, 30 to 400 nm, or 50 to 300 nm.
- a quartz substrate is used as the substrate, a replica of the quartz imprint mold (mold replica) can be produced.
- an adhesion layer and / or a silicone layer containing 99% by mass or less, or 50% by mass or less of Si on the resist underlayer film according to the present invention by coating or vapor deposition.
- a Si-based inorganic material film can be formed by a CVD method or the like.
- the resist underlayer film forming composition according to the present invention is applied onto a semiconductor substrate (so-called stepped substrate) having a portion having a step and a portion having no step, and fired to obtain the portion having the step. It is possible to reduce the step with the portion having no step.
- the method for manufacturing a semiconductor device according to the present invention is as follows.
- Step of forming a resist film on the formed resist underlayer film
- the method for manufacturing a semiconductor device is as follows.
- a step of forming a resist underlayer film using the resist underlayer film forming composition according to the present invention The process of forming a hard mask on the formed resist underlayer film, The process of forming a resist film on the formed hard mask, A step of forming a resist pattern by irradiating and developing a formed resist film with light or an electron beam.
- the step of forming the resist underlayer film using the resist underlayer film forming composition according to the present invention is as described above.
- An organopolysiloxane film may be formed as a second resist underlayer film on the resist underlayer film formed by the above step, and a resist pattern may be formed on the organopolysiloxane film.
- the second resist underlayer film may be a SiON film or a SiN film formed by a vapor deposition method such as CVD or PVD.
- an antireflection film BARC
- the third resist underlayer film is a resist shape correction film having no antireflection ability. You may.
- the exposure is performed through a mask (reticle) for forming a predetermined pattern or by drawing directly.
- a mask for example, g-ray, i-ray, KrF excimer laser, ArF excimer laser, EUV, and electron beam can be used.
- post-exposure heating Post Exposure Bake
- a developing solution for example, 2.38% by mass tetramethylammonium hydroxide aqueous solution
- a rinsing solution or pure water to remove the used developing solution.
- post-baking is performed to dry the resist pattern and improve the adhesion to the substrate.
- the etching step performed after forming the resist pattern is performed by dry etching.
- the etching gas used for dry etching include CHF 3 , CF 4 , and C 2 F 6 for the second resist underlayer film (organopolysiloxane film), from the resist underlayer film forming composition of the present invention.
- the formed first resist underlayer film include O 2 , N 2 O, and NO 2 , and for surfaces having steps or recesses and / or protrusions, for example, CHF 3 , CF 4 , C. 2 F 6 is mentioned.
- argon, nitrogen or carbon dioxide can be mixed with these gases and used.
- the method is A step of applying the curable composition onto the formed resist underlayer film, The step of bringing the curable composition into contact with the mold, A step of irradiating the curable composition with light or an electron beam to form a cured film, and a step of separating the cured film from the mold. including.
- the polymer (X) according to the present invention is expected to exhibit good permeability to gases such as He, H2, N2 , and air, exhibits good embedding property, hardness, and bending resistance, and has a molecular skeleton. By changing, it is possible to adjust the optical constant and etching rate to suit the process.
- the details are as disclosed in, for example, the section [Formation of resist underlayer film by nanoimprint method] in WO2021 / 172295 (Japanese Patent Application No. 2020-033333).
- the obtained precipitate was dried to obtain a resin (1-2).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 5,100.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the obtained precipitate was dried to obtain a resin (1-3).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 6,500.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the obtained precipitate was dried to obtain a resin (1-4).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 7,600.
- the obtained resin was dissolved in propylene glycol monomethyl ether (hereinafter referred to as PGME), and ion exchange was carried out using a cation exchange resin and an anion exchange resin for 4 hours to obtain a target compound solution.
- PGME propylene glycol monomethyl ether
- the obtained precipitate was dried to obtain a resin (1-5).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 15,200.
- the obtained resin was dissolved in cyclohexanone (hereinafter referred to as CYH), and ion exchange was carried out using a cation exchange resin and an anion exchange resin for 4 hours to obtain a desired compound solution.
- CYH cyclohexanone
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 5,700.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the obtained precipitate was dried to obtain a resin (1-8).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 14,400.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the obtained precipitate was dried to obtain a resin (1-9).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 5,000.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the obtained precipitate was dried to obtain a resin (1-10).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 7,500.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 4,400.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was about 1,500.
- the obtained resin was dissolved in PGMEA, and ion exchange was carried out for 4 hours using a cation exchange resin and an anion exchange resin to obtain a target compound solution.
- Example 1 A resin solution (solid content 17.17% by mass) was obtained in Synthesis Example 1. To 4.97 g of this resin solution, 0.17 g of TMOM-BP (Honshu Kagaku Co., Ltd.), 1.95 g of PGME containing 2% by mass pyridinium p-hydroxybenzenesulfonate, and 1% by mass of surfactant (DIC Co., Ltd., Megafuck R- 40) 0.09 g of PGMEA, 5.57 g of PGMEA and 2.93 g of PGMEA contained were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- Example 2 A resin solution (solid content 17.17% by mass) was obtained in Synthesis Example 1. 1.53 g of PGME containing 2% by mass pyridinium p-hydroxybenzenesulfonate in 5.93 g of this resin solution, 0.10 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40), 4.75 g of PGMEA, PGME2. 69 g was added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 3 A resin solution (solid content 17.17% by mass) was obtained in Synthesis Example 1. To 13.96 g of this resin solution, 0.24 g of PGMEA, 0.52 g of PGMEA and 5.28 g of PGMEA containing 1% by mass of a surfactant (DIC Corporation, Megafuck R-40) were added and dissolved, and polytetrafluoro having a pore size of 0.1 ⁇ m was dissolved. A solution of the resist underlayer film forming composition was prepared by filtering with an ethylene microfilter.
- a surfactant DIDIC Corporation, Megafuck R-40
- Example 4 A resin solution (solid content 14.96% by mass) was obtained in Synthesis Example 2. To 5.70 g of this resin solution, 0.17 g of TMOM-BP, 1.28 g of PGMEA containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, 0.09 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40), 4.83 g of PGMEA and 2.93 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 5 A resin solution (solid content 17.90% by mass) was obtained in Synthesis Example 3. To 4.77 g of this resin solution, 0.17 g of TMOM-BP, 1.28 g of PGME containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, 0.09 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40), 5.77 g of PGMEA and 2.91 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 6 A resin solution (solid content 17.39% by mass) was obtained in Synthesis Example 4. 1.90 g of this resin solution, 0.17 g of TMOM-BP, 1.28 g of PGMEA containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, 0.09 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40). 4.10 g of PGMEA and 4.46 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 7 A resin solution (solid content 17.40% by mass) was obtained in Synthesis Example 5. 1.90 g of this resin solution, 0.17 g of TMOM-BP, 1.28 g of PGMEA containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, 0.09 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40).
- Example 8 A resin solution (solid content 21.61% by mass) was obtained in Synthesis Example 6. In 3.76 g of this resin solution, 0.16 g of TMOM-BP, 1.22 g of PGME containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, and 0.08 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40). 3.27 g of PGMEA and 1.51 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 9 A resin solution (solid content 19.85% by mass) was obtained in Synthesis Example 7. To 4.09 g of this resin solution, 0.16 g of TMOM-BP, 1.22 g of PGMEA containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, and 0.08 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40). 2.94 g of PGMEA and 1.51 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 10 A resin solution (solid content 20.06% by mass) was obtained in Synthesis Example 8. To 4.05 g of this resin solution, 0.16 g of TMOM-BP, 1.22 g of PGME containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, and 0.08 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40). 2.98 g of PGMEA and 1.51 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 11 A resin solution (solid content 19.38% by mass) was obtained in Synthesis Example 9. To 4.19 g of this resin solution, 0.16 g of TMOM-BP, 1.22 g of PGMEA containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, and 0.08 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40). 2.84 g of PGMEA and 1.51 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 12 A resin solution (solid content 17.52% by mass) was obtained in Synthesis Example 10. 1.87 g of this resin solution, 0.17 g of TMOM-BP, 1.28 g of PGMEA containing 2% by mass of pyridinium p-hydroxybenzenesulfonate, 0.09 g of PGMEA containing 1% by mass of a surfactant (DIC Co., Ltd., Megafuck R-40). 5.66 g of PGMEA and 2.91 g of PGME were added and dissolved, and the mixture was filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to prepare a solution of a resist underlayer film forming composition.
- a surfactant DI Co., Ltd., Megafuck R-40
- Example 13 A resin solution (solid content: 30.00% by mass) was obtained in Synthesis Example 11. To 4.33 g of this resin solution, 1.51 g of the resin solution (solid content 17.17% by mass) obtained in Synthesis Example 1, 2.95 g of PGME containing 2% by mass pyridinium p-hydroxybenzenesulfonate, and 1% by mass of a surfactant ( DIC Co., Ltd., Megafuck R-40) -containing PGMEA 0.13 g, PGMEA 10.31 g, PGME 1.77 g are added and dissolved, and filtered through a polytetrafluoroethylene microfilter having a pore size of 0.1 ⁇ m to form a resin underlayer film. A solution of the composition was prepared.
- a surfactant DIC Co., Ltd., Megafuck R-40
- Example 1 shows good curability, while the comparative example lacks curability. Therefore, introducing specific cross-linking groups into the polymer provides a great advantage for curability. Further, in general, solvent resistance cannot be obtained by low-temperature firing except when firing in combination with a cross-linking agent and a catalyst. However, as in Example 1-12, by having a specific cross-linking group in the polymer, when a cross-linking agent and an acid catalyst are used, when only an acid catalyst is used, or when neither a cross-linking agent nor an acid catalyst is used, Sufficient curability can be obtained in all cases.
- the solutions of the resist underlayer film forming composition prepared in Comparative Example 1 and Example 1-12 were each applied onto a silicon wafer using a spin coater.
- the resist underlayer film (film thickness 50 nm) was formed by firing on a hot plate at 240 ° C., 350 ° C. or 400 ° C. for 60 seconds.
- the refractive index (n value) and the optical extinction coefficient (k value, also referred to as attenuation coefficient) at a wavelength of 193 nm were measured on these resist underlayers using a spectroscopic ellipsometer (Table 2).
- the optical constant can be changed by changing the type of the compound to be combined.
- the solutions of the resist underlayer film forming composition prepared in Comparative Example 1 and Example 1-12 were each applied onto a silicon wafer using a spin coater.
- a resist underlayer film (thickness 200 nm) was formed by firing on a hot plate at 240 ° C., 350 ° C. or 400 ° C. for 60 seconds.
- the dry etching rate was measured using CF 4 gas as the etching gas, and the dry etching rate ratios of Comparative Example 1 and Example 1-12 were obtained.
- the dry etching rate ratio is the dry etching rate ratio of (resist underlayer film) / (KrF photoresist) (Table 3).
- the etching rate can be changed by changing the type of the compound to be combined.
- Comparing Comparative Example 1 and Example 1-12 by having a specific cross-linking group in the polymer, when a cross-linking agent and an acid catalyst are used, when only an acid catalyst is used, both a cross-linking agent and an acid catalyst are used. If not, the amount of sublimation can be significantly reduced in all cases. Further, when the compound to be reacted is changed, the amount of sublimated material can be similarly suppressed to a low level. Therefore, the concern about equipment contamination can be reduced.
- Comparing Comparative Example 1 and Example 1-12 by having a specific cross-linking group in the polymer, when a cross-linking agent and an acid catalyst are used, when only an acid catalyst is used, and both the cross-linking agent and the acid catalyst are used.
- the hardness can be increased in all cases when it is not used.
- the hardness usually increases as the firing is performed at a high temperature.
- the examples are fired at a low temperature of 240 ° C.
- the hardness is higher than that of the comparative example when the examples are fired at a high temperature of 350 ° C. Therefore, it is considered to have good bending resistance not only in the case of high temperature firing but also in the case of low temperature firing.
- the embedding property was confirmed in the SiO 2 substrate having a film thickness of 200 nm, the trench width of 50 nm, and the dense pattern area having a pitch of 100 nm.
- the resist underlayer film forming composition prepared in Comparative Example 1 and Example 1-12 was applied onto the substrate and then fired at 240 ° C., 350 ° C. or 400 ° C. for 60 seconds to form a resist underlayer film having a diameter of about 200 nm.
- the flatness of this substrate was observed using a scanning electron microscope (S-4800) manufactured by Hitachi High-Technologies Corporation, and it was confirmed whether or not the resist underlayer film forming composition was filled inside the pattern (Table 6). .. Those in which the resist underlayer film forming composition was filled in the pattern were described as ⁇ , and those in which the resist underlayer film forming composition was not filled in the pattern were described as x.
- the solutions of the resist underlayer film forming compositions prepared in Comparative Example 1 and Example 12 were applied onto a silicon wafer with a silicon oxide film, respectively, using a spin coater.
- a resist underlayer film (thickness 200 nm) was formed by firing on a hot plate at 350 ° C. for 60 seconds.
- a silicon hard mask forming composition solution was applied onto the resist underlayer film and fired at 240 ° C. for 1 minute to form a silicon hard mask layer (thickness: 30 nm).
- a resist solution was applied thereto and fired at 100 ° C. for 1 minute to form a resist layer (thickness: 150 nm).
- An exposure was made using a mask at a wavelength of 193 nm, and after exposure, heating PEB (at 105 ° C. for 1 minute) was performed and then developed to obtain a resist pattern. Then, dry etching was performed using a fluorine-based gas and an oxygen-based gas, the resist pattern was transferred to a silicon wafer with a silicon oxide film, and each pattern shape was observed with CG-4100 manufactured by Hitachi High Technology Co., Ltd.
- the evaluation when the material of the present invention is used as a cross-linking agent is as follows.
- the methods as described above were used for the elution test to the resist solvent, the optical constant measurement, the dry etching rate measurement, and the hardness and bending resistance test.
- the coating test on the stepped substrate and the heat resistance evaluation were carried out as follows.
- the flatness of this substrate was observed using a scanning electron microscope (S-4800) manufactured by Hitachi High-Technologies Corporation, and the film thickness of the trench area (pattern portion) and open area (non-pattern portion) of the stepped substrate was observed.
- the flatness was evaluated by measuring the difference (the coating step between the trench area and the open area, which is called the bias).
- the flattening property is a portion where the pattern exists (trench area (pattern portion)) and a portion where the pattern does not exist (open area (non-pattern portion)), and the coated coating film existing on the upper portion thereof. It means that the film thickness difference (Iso-dense bias) of the object is small. Those having a smaller bias than Comparative Example 2 were evaluated as ⁇ .
- the material of the present invention when used as a cross-linking agent, it is possible to prepare a material having higher flattening property, higher heat resistance and higher hardness and better bending resistance than the cross-linking agent of the comparative example.
- the present invention it is possible to meet the demands of self-curing at a low temperature without containing an acid catalyst or a cross-linking agent, reducing the amount of sublimates, and obtaining a high-hardness film having high bending resistance, and a cross-linking agent.
- a cross-linking agent When used as a cross-linking agent, it exhibits higher flattening and higher heat resistance than conventional cross-linking agents, and has the same embedding property as conventional products.
- a novel resist underlayer film forming composition that can be modified is provided.
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Abstract
Description
で表される構造単位を有するポリマー及び溶剤を含むレジスト下層膜形成組成物が開示されている。
[1] ROCH2-基(Rは一価の有機基、水素原子又はこれらの混合である)を有する芳香族化合物Aと、Aとは異なる炭素原子数120以下の芳香族化合物Bとが、連結基-O-を介して交互に結合した繰り返し構造単位であって、1個のAに対して1~6個のBが結合した繰り返し構造単位を含むポリマー(X)、及び
溶剤を含むレジスト下層膜形成組成物。
[2] ポリマー(X)が式(1)で表される繰り返し構造単位を含む、[1]に記載のレジスト下層膜形成組成物。
(式(1)中、A1はROCH2-基(Rは一価の有機基、水素原子又はこれらの混合である)を有する芳香族化合物A由来の有機基を表し、B1はA1とは異なる炭素原子数120以下の芳香族化合物B由来の有機基を表す。)
[3] 式(1)におけるRが、フェニル基、ナフチル基若しくはアントラセニル基で置換されていてもよく、酸素原子、窒素原子若しくはカルボニル基で中断されていてもよい、飽和若しくは不飽和の直鎖若しくは分岐のC2-C20脂肪族若しくはC3-C20脂環式炭化水素基、水素原子、又はこれらの混合である、[2]に記載のレジスト下層膜形成組成物。
[4] 式(1)におけるB1が、下記式2で表される、[2]に記載のレジスト下層膜形成組成物。
(式(2)中、
C1、C2はそれぞれ独立して、炭素原子数6~48のヘテロ原子を含んでも良い炭素原子数6~48の芳香族環、又はヘテロ原子を含んでもよい炭素原子数6~48の芳香族環を含む炭化水素基を表し、
Yは単結合、カルボニル基、スルホニル基、-CR1 2-基、又は-(CF3)C(CF3)-基を表し、
R1は酸素原子、カルボニル基、窒素原子、炭素炭素二重結合、若しくは炭素炭素三重結合で中断されていても良く、炭素炭素二重結合、若しくは炭素炭素三重結合が末端に結合しても良い炭素原子数1~10のアルキル基、ヒドロキシ基、水素原子、ハロゲン、炭素原子数6~20の芳香族炭化水素基、又は-NR2 2を表し、
R2は炭素炭素二重結合、若しくは炭素炭素三重結合で中断されていても良く、炭素炭素二重結合、若しくは炭素炭素三重結合が末端に結合しても良い炭素原子数1~10の鎖状又は環状のアルキル基を表し、
iは0又は1であり、
点線は酸素原子との結合を表す。)
[5] 式(2)におけるiが1である、[4]に記載のレジスト下層膜形成組成物。
[6] ポリマー(X)が式(3)で表される繰り返し構造単位を更に含む、[4]又は[5]に記載のレジスト下層膜形成組成物。
(式(3)中、B1は前記式2で表され、A2はB1とは異なる炭素原子数120以下の芳香族化合物A’由来の有機基を表す。)
[7] 式(1)におけるA1がフェノール性水酸基を有さない、[2]乃至[6]のいずれか一項に記載のレジスト下層膜形成組成物。
[8] ポリマー(X)が、置換されていてもよい炭素原子数6~30の芳香族炭化水素基を少なくとも一の末端に有する、[1]乃至[6]のいずれか一項に記載のレジスト下層膜形成組成物。
[9] ポリマー(X)と架橋反応可能な膜材料(Z)を更に含む、[1]乃至[8]のいずれか一項に記載のレジスト下層膜形成組成物。
[10] 架橋剤を更に含む、[1]乃至[9]のいずれか一項に記載のレジスト下層膜形成組成物。
[11] 酸及び/又は酸発生剤を更に含む、[1]乃至[10]のいずれか一項に記載のレジスト下層膜形成組成物。
[12] 界面活性剤を更に含む、[1]乃至[11]のいずれか一項に記載のレジスト下層膜形成組成物。
[13] 前記溶剤が160℃以上の沸点を有する溶媒を含む[1]乃至[12]のいずれか一項に記載のレジスト下層膜形成組成物。
[14] [1]乃至[13]のいずれか一項に記載の組成物からなる塗布膜の焼成物であることを特徴とするレジスト下層膜。
[15] 半導体基板上に[1]乃至[13]のいずれか一項に記載の組成物を用いてレジスト下層膜を形成する工程、
形成されたレジスト下層膜の上にレジスト膜を形成する工程、
形成されたレジスト膜に対する光又は電子線の照射と現像によりレジストパターンを形成する工程、
形成されたレジストパターンを介して前記レジスト下層膜をエッチングし、パターン化する工程、及び
パターン化されたレジスト下層膜を介して半導体基板を加工する工程
を含む半導体装置の製造方法。
[16] 半導体基板上に[1]乃至[13]のいずれか一項に記載の組成物を用いてレジスト下層膜を形成する工程、
形成されたレジスト下層膜の上にハードマスクを形成する工程、
形成されたハードマスクの上にレジスト膜を形成する工程、
形成されたレジスト膜に対する光又は電子線の照射と現像によりレジストパターンを形成する工程、
形成されたレジストパターンを介して前記ハードマスクをエッチングし、パターン化する工程、及び
パターン化されたハードマスクを介して前記レジスト下層膜をエッチングし、パターン化する工程、及び
パターン化されたレジスト下層膜を介して半導体基板を加工する工程
を含む半導体装置の製造方法。
[17] レジスト下層膜を形成する工程をナノインプリント法によって行う[15]又は[16]に記載の半導体装置の製造方法。
ポリマー(X)は、ROCH2-基(Rは一価の有機基、水素原子又はこれらの混合である)を有する芳香族化合物Aと、Aとは異なる炭素原子数120以下の芳香族化合物Bとが、連結基-O-を介して交互に結合した繰り返し構造単位であって、1個のAに対して1~6個、好ましくは1~4個、好ましくは2~4個、より好ましくは2~3個、最も好ましくは2個のBが結合した繰り返し構造単位を含む。
(式(1)中、A1はROCH2-基(Rは一価の有機基、水素原子又はこれらの混合である)を有する芳香族化合物A由来の有機基を表し、B1はA1とは異なる炭素原子数120以下の芳香族化合物B由来の有機基を表す。)
(式(2)中、
C1、C2はそれぞれ独立して、炭素原子数6~48のヘテロ原子を含んでも良い炭素原子数6~48の芳香族環、又はヘテロ原子を含んでもよい炭素原子数6~48の芳香族環を含む炭化水素基を表し、
Yは単結合、カルボニル基、スルホニル基、-CR1 2-基、又は-(CF3)C(CF3)-基を表し、
R1は酸素原子、カルボニル基、窒素原子、炭素炭素二重結合、若しくは炭素炭素三重結合で中断されていても良く、炭素炭素二重結合、若しくは炭素炭素三重結合が末端に結合しても良い炭素原子数1~10のアルキル基、ヒドロキシ基、水素原子、ハロゲン、炭素原子数6~20の芳香族炭化水素基、又は-NR2 2を表し、
R2は炭素炭素二重結合、若しくは炭素炭素三重結合で中断されていても良く、炭素炭素二重結合、若しくは炭素炭素三重結合が末端に結合しても良い炭素原子数1~10の鎖状又は環状のアルキル基を表し、
iは0又は1であり、
点線は酸素原子との結合を表す。)
好ましくは、式(2)におけるiは1である。
芳香族化合物Aは、ROCH2-基を有することを条件に、
(a)ベンゼンのような単環化合物であってもよく、
(b)ナフタレン、アントラセン、ピレンのような縮合環化合物であってもよく、
(c)フラン、ピロール、チオフェン、ピリジン、カルバゾール、イミノスチルベン、フェノチアジン、インドール、インドロカルバゾールのような複素環化合物であってもよく、
(d)ビフェニル、フェニルインドール、α,α,α’,α’-テトラキス(4-ヒドロキシフェニル)-p-キシレン、カリックスアレンのように(a)~(c)の芳香族環が単結合やアルキレン基で結合された化合物であってもよく、
(e)2,2-ジフェニルプロパンのように、-(CH2)n-(n=1~20)、-CH=CH-、-C≡C-、-N=N-、-NH-、-NR-、-NHCO-、-NRCO-、-S-、-COO-、-O-、-CO-及び-CH=N-で例示されるスペーサーで(a)~(d)の芳香族環が連結された化合物であってもよく、
(f)9,9-ビス(4-ヒドロキシフェニル)フルオレンなどのフルオレン、後述するフルオレンまたはフルオレノン骨格を持つ化合物でもよい。
上述の例はこれらに限定されるわけではない。
芳香族化合物Aの例としては更に、以下に例示するようなフルオレンまたはフルオレノン骨格を有する化合物が挙げられる。
本発明のレジスト下層膜形成組成物は、上記の各成分を適当な溶剤に溶解させることによって調製でき、均一な溶液状態で用いられる。
(式(i)中のR1、R2及びR3は各々水素原子、酸素原子、硫黄原子又はアミド結合で中断されていてもよい炭素原子数1~20のアルキル基を表し、互いに同一であっても異なっても良く、互いに結合して環構造を形成しても良い。)
下記式:
で表される化合物が好ましく、式(i)で表される化合物として特に好ましいのは、3-メトキシ-N,N-ジメチルプロピオンアミド、及びN,N-ジメチルイソブチルアミドである。
本発明のレジスト下層膜形成組成物は、更に任意成分として、架橋剤、酸及び/又は酸発生剤、熱酸発生剤及び界面活性剤のうち少なくとも1つを含有してもよい。
本発明のレジスト下層膜形成組成物は、さらに架橋剤を含有することができる。前記架橋剤としては、少なくとも二つの架橋形成置換基を有する架橋性化合物が好ましく用いられる。例えば、メチロール基、メトキシメチル基等の架橋形成置換基を有する、メラミン系化合物、置換尿素系化合物及びフェノール系化合物またはそれらのポリマー系等が挙げられる。具体的には、メトキシメチル化グリコールウリル、ブトキシメチル化グリコールウリル、メトキシメチル化メラミン、ブトキシメチル化メラミン、メトキシメチル化ベンゾグワナミン、ブトキシメチル化ベンゾグワナミン、などの化合物であり、例えば、テトラメトキシメチルグリコールウリル、テトラブトキシメチルグリコールウリル、ヘキサメトキシメチルメラミンを挙げることができる。さらに、置換尿素系化合物として、メトキシメチル化尿素、ブトキシメチル化尿素、またはメトキシメチル化チオ尿素等の化合物であり、例えば、テトラメトキシメチル尿素、テトラブトキシメチル尿素を挙げることができる。また、これらの化合物の縮合体も使用することができる。フェノール系化合物として、例えば、テトラヒドロキシメチルビフェノール、テトラメトキシメチルビフェノール、テトラヒドロキシメチルビスフェノール、テトラメトキシメチルビスフェノール、及び下記式で表される化合物等を挙げることができる。
上記R11、R12、R13、及びR14は水素原子又は炭素数1乃至10のアルキル基であり、これらのアルキル基は上述の例示を用いることができる。
架橋剤の添加量は、使用する塗布溶媒、使用する基板、要求される溶液粘度、要求される膜形状などにより変動するが、全固形分に対して0.001質量%以上、0.01質量%以上、0.05質量%以上、0.5質量%以上、又は1.0質量%以上であり、80質量%以下、50質量%以下、40質量%以下、20質量%以下、又は10質量%以下である。これら架橋剤は自己縮合による架橋反応を起こすこともあるが、本発明の上記重合体中に架橋性置換基が存在する場合は、それらの架橋性置換基と架橋反応を起こすことができる。
本発明に係るレジスト下層膜形成組成物は、酸及び/又はその塩及び/又は酸発生剤を含むことができる。
塩としては前述の酸の塩を用いることもできる。塩としては限定されるものではないがトリメチルアミン塩、トリエチルアミン塩等のアンモニア誘導体塩やピリジン誘導体塩、モルホリン誘導体塩等を好適に用いることができる。
酸及び/又はその塩は一種のみを使用することができ、または二種以上を組み合わせて使用することができる。配合量は全固形分に対して、通常0.0001乃至20質量%、好ましくは0.0005乃至10質量%、さらに好ましくは0.01乃至5質量%である。
熱酸発生剤としては、2,4,4,6-テトラブロモシクロヘキサジエノン、ベンゾイントシレート、2-ニトロベンジルトシレート、K-PURE〔登録商標〕CXC-1612、同CXC-1614、同TAG-2172、同TAG-2179、同TAG-2678、同TAG2689、同TAG2700(King Industries社製)、及びSI-45、SI-60、SI-80、SI-100、SI-110、SI-150(三新化学工業(株)製)その他、トリフルオロ酢酸の第4級アンモニウム塩、有機スルホン酸アルキルエステル等が挙げられる。
本発明のレジスト下層膜形成組成物に含まれる光酸発生剤としては、オニウム塩化合物、スルホンイミド化合物、及びジスルホニルジアゾメタン化合物等が挙げられる。
酸発生剤が使用される場合、その割合としては、レジスト下層膜形成組成物の固形分100質量部に対して、0.01乃至10質量部、または0.1乃至8質量部、または0.5乃至5質量部である。
本発明のレジスト下層膜形成組成物は、さらに界面活性剤を含有することができる。前記界面活性剤としては、例えば、ポリオキシエチレンラウリルエーテル、ポリオキシエチレンステアリルエーテル、ポリオキシエチレンセチルエーテル、ポリオキシエチレンオレイルエーテル等のポリオキシエチレンアルキルエーテル類、ポリオキシエチレンオクチルフェニルエーテル、ポリオキシエチレンノニルフェニルエーテル等のポリオキシエチレンアルキルアリールエーテル類、ポリオキシエチレン・ポリオキシプロピレンブロックコポリマー類、ソルビタンモノラウレート、ソルビタンモノパルミテート、ソルビタンモノステアレート、ソルビタンモノオレエート、ソルビタントリオレエート、ソルビタントリステアレート等のソルビタン脂肪酸エステル類、ポリオキシエチレンソルビタンモノラウレート、ポリオキシエチレンソルビタンモノパルミテート、ポリオキシエチレンソルビタンモノステアレート、ポリオキシエチレンソルビタントリオレエート、ポリオキシエチレンソルビタントリステアレート等のポリオキシエチレンソルビタン脂肪酸エステル類等のノニオン系界面活性剤、エフトップ〔登録商標〕EF301、同EF303、同EF352(三菱マテリアル電子化成(株)製)、メガファック〔登録商標〕F171、同F173、同R-30、同R-30-N、同R-40、同R-40-LM(DIC(株)製)、フロラードFC430、同FC431(住友スリーエム(株)製)、アサヒガード〔登録商標〕AG710、サーフロン〔登録商標〕S-382、同SC101、同SC102、同SC103、同SC104、同SC105、同SC106(旭硝子(株)製)等のフッ素系界面活性剤、オルガノシロキサンポリマーKP341(信越化学工業(株)製)を挙げることができる。これらの界面活性剤から選択された1種類を添加してもよいし、2種以上を組合せて添加することもできる。前記界面活性剤の含有割合は、本発明のレジスト下層膜形成組成物から後述する溶剤を除いた固形分に対して、例えば0.01質量%乃至5質量%である。
本発明に係るポリマー(X)は、膜材料(Z)の架橋剤としても使用することができる。すなわち、本発明に係るレジスト下層膜形成組成物は、ポリマー(X)と架橋反応可能な膜材料(Z)を更に含む。膜材料(Z)は、ポリマー(X)と架橋反応可能な膜材料であると言える。
(Y1)脂肪族環を含有する膜材料(例えば上記(a))、
(Y2)ノボラック膜材料(例えば上記(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l))、
(Y3)ポリエーテル膜材料(例えば上記(z))、
(Y4)ポリエステル膜材料(例えば上記(o)(p))、
(Y5)架橋性化合物(A)と異なる化合物(例えば上記(n)(r)(s)(t)(u)(v)(w)(x)(y))、
(Y6)芳香族縮合環を含有する膜材料(例えば上記(q))、
(Y7)アクリル樹脂、及び
(Y8)メタクリル樹脂
からなる群より選択される少なくとも一種を含む。
吸光剤としては例えば、「工業用色素の技術と市場」(CMC出版)や「染料便覧」(有機合成化学協会編)に記載の市販の吸光剤、例えば、C.I.Disperse Yellow 1,3,4,5,7,8,13,23,31,49,50,51,54,60,64,66,68,79,82,88,90,93,102,114及び124;C.I.Disperse Orange1,5,13,25,29,30,31,44,57,72及び73;C.I.Disperse Red 1,5,7,13,17,19,43,50,54,58,65,72,73,88,117,137,143,199及び210;C.I.Disperse Violet 43;C.I.Disperse Blue 96;C.I.Fluorescent Brightening Agent 112,135及び163;C.I.Solvent Orange2及び45;C.I.Solvent Red 1,3,8,23,24,25,27及び49;C.I.Pigment Green 10;C.I.Pigment Brown 2等を好適に用いることができる。上記吸光剤は通常、レジスト下層膜形成組成物の全固形分に対して10質量%以下、好ましくは5質量%以下の割合で配合される。
レオロジー調整剤は、主にレジスト下層膜形成組成物の流動性を向上させ、特にベーキング工程において、レジスト下層膜の膜厚均一性の向上やホール内部へのレジスト下層膜形成組成物の充填性を高める目的で添加される。具体例としては、ジメチルフタレート、ジエチルフタレート、ジイソブチルフタレート、ジヘキシルフタレート、ブチルイソデシルフタレート等のフタル酸誘導体、ジノルマルブチルアジペート、ジイソブチルアジペート、ジイソオクチルアジペート、オクチルデシルアジペート等のアジピン酸誘導体、ジノルマルブチルマレート、ジエチルマレート、ジノニルマレート等のマレイン酸誘導体、メチルオレート、ブチルオレート、テトラヒドロフルフリルオレート等のオレイン酸誘導体、またはノルマルブチルステアレート、グリセリルステアレート等のステアリン酸誘導体を挙げることができる。これらのレオロジー調整剤は、レジスト下層膜形成組成物の全固形分に対して通常30質量%未満の割合で配合される。
接着補助剤は、主に基板あるいはレジストとレジスト下層膜形成組成物の密着性を向上させ、特に現像においてレジストが剥離しないようにするための目的で添加される。具体例としては、トリメチルクロロシラン、ジメチルメチロールクロロシラン、メチルジフエニルクロロシラン、クロロメチルジメチルクロロシラン等のクロロシラン類、トリメチルメトキシシラン、ジメチルジエトキシシラン、メチルジメトキシシラン、ジメチルメチロールエトキシシラン、ジフエニルジメトキシシラン、フエニルトリエトキシシラン等のアルコキシシラン類、ヘキサメチルジシラザン、N,N’-ビス(トリメチルシリル)ウレア、ジメチルトリメチルシリルアミン、トリメチルシリルイミダゾール等のシラザン類、メチロールトリクロロシラン、γ-クロロプロピルトリメトキシシラン、γ-アミノプロピルトリエトキシシラン、γ-グリシドキシプロピルトリメトキシシラン等のシラン類、ベンゾトリアゾール、ベンズイミダゾール、インダゾール、イミダゾール、2-メルカプトベンズイミダゾール、2-メルカプトベンゾチアゾール、2-メルカプトベンゾオキサゾール、ウラゾール、チオウラシル、メルカプトイミダゾール、メルカプトピリミジン等の複素環式化合物や、1,1-ジメチルウレア、1,3-ジメチルウレア等の尿素、またはチオ尿素化合物を挙げることができる。これらの接着補助剤は、レジスト下層膜形成組成物の全固形分に対して通常5質量%未満、好ましくは2質量%未満の割合で配合される。
レジスト下層膜は、本発明に係るレジスト下層膜形成組成物を用いて、以下のように形成することができる。
半導体装置の製造に使用される基板(例えば、シリコンウエハー基板、二酸化シリコン被覆基板(SiO2基板)、シリコンナイトライド基板(SiN基板)、窒化酸化珪素基板(SiON基板)、チタンナイトライド基板(TiN基板)、タングステン基板(W基板)、ガラス基板、ITO基板、ポリイミド基板、及び低誘電率材料(low-k材料)被覆基板等)の上に、スピナー、コーター等の適当な塗布方法により本発明のレジスト下層膜形成組成物を塗布し、その後、ホットプレート等の加熱手段を用いて焼成することによりレジスト下層膜が形成される。焼成する条件としては、焼成温度80℃乃至600℃、焼成時間0.3乃至60分間の中から適宜選択される。好ましくは、焼成温度150℃乃至350℃、焼成時間0.5乃至2分間である。焼成時の雰囲気気体としては空気を用いてもよく、窒素、アルゴン等の不活性ガスを用いることもできる。ここで、形成される下層膜の膜厚としては、例えば、10乃至1000nmであり、又は20乃至500nmであり、又は30乃至400nmであり、又は50乃至300nmである。また、基板として石英基板を用いれば、石英インプリントモールドのレプリカ(モールドレプリカ)を作製することができる。
本発明に係る半導体装置の製造方法は、
本発明に係るレジスト下層膜形成組成物を用いてレジスト下層膜を形成する工程、
形成されたレジスト下層膜の上にレジスト膜を形成する工程、
形成されたレジスト膜に対する光又は電子線の照射と現像によりレジストパターンを形成する工程、
形成されたレジストパターンを介して前記レジスト下層膜をエッチングし、パターン化する工程、及び
パターン化されたレジスト下層膜を介して半導体基板を加工する工程
を含む。
本発明に係るレジスト下層膜形成組成物を用いてレジスト下層膜を形成する工程、
形成されたレジスト下層膜の上にハードマスクを形成する工程、
形成されたハードマスクの上にレジスト膜を形成する工程、
形成されたレジスト膜に対する光又は電子線の照射と現像によりレジストパターンを形成する工程、
形成されたレジストパターンを介して前記ハードマスクをエッチングし、パターン化する工程、及び
パターン化されたハードマスクを介して前記レジスト下層膜をエッチングし、パターン化する工程、及び
パターン化されたレジスト下層膜を介して半導体基板を加工する工程
を含む。
上記のレジスト下層膜を形成する工程をナノインプリント法によって行うことも可能である。その方法は、
形成されたレジスト下層膜上に硬化性組成物を適用する工程、
前記硬化性組成物とモールドとを接触させる工程、
前記硬化性組成物に光又は電子線を照射して硬化膜とする工程、及び
前記硬化膜と前記モールドとを引き離す工程、
を含む。
装置:東ソー株式会社製HLC-8320GPC
GPCカラム:TSKgel Super-MultiporeHZ-N (2本)
カラム温度:40℃
流量:0.35ml/分
溶離液:THF
標準試料:ポリスチレン
フラスコにTMOM-BP(本州化学工業株式会社)12.00g、4,4-ジフルオロベンゾフェノン(東京化成工業株式会社、以後DFBPと記載)7.23g、炭酸カリウム(富士フイルム和光純薬工業株式会社製)4.78g、N-メチルピロリドン(以後NMPと記載)56.01gを入れた。その後、窒素下で150℃まで加熱し、約4.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-1)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約7,300であった。得られた樹脂をプロピレングリコールモノメチルエーテル(以後PGMEAと記載)に溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP15.00g、DFBP4.52g、4,4’-ジフルオロジフェニルメタン4,23g、炭酸カリウム2.99g、NMP52.51gを入れた。その後、窒素下で150℃まで加熱し、約4.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-2)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約5,100であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP12.00g、9,9-ビス(4-ヒドロキシフェニル)フルオレン(東京化成工業株式会社)11.60g、DFBP14.45g、炭酸カリウム9.55g、NMP111.06gを入れた。その後、窒素下で150℃まで加熱し、約3.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-3)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約6,500であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP15.00g、1,5-ジヒドロキシナフタレン(東京化成工業株式会社)6.63g、DFBP18.06g、炭酸カリウム11.93g、NMP120.45gを入れた。その後、窒素下で150℃まで加熱し、約1.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-4)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約7,600であった。得られた樹脂をプロピレングリコールモノメチルエーテル(以後PGMEと記載)に溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP15.00g、1,4-ジフルオロベンゼン(東京化成株式会社、以後DFBと記載)2.36g、DFBP4.52g、炭酸カリウム5.97g、NMP25.49gを入れた。その後、窒素下で150℃まで加熱し、約3時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-5)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約15,200であった。得られた樹脂をシクロヘキサノン(以後CYHと記載)に溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP10.00g、1-ナフトール1.10g,DFBP7.53g、炭酸カリウム4.97g、NMP55.07gを入れた。その後、窒素下で150℃まで加熱し、約4.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-6)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約5,700であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP12.00g、4-フルオロスチレン(東京化成株式会社)0.81g、DFBP5.78g、炭酸カリウム4.77g、NMP54.51gを入れた。その後、窒素下で150℃まで加熱し、約4.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-8)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約14,400であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP12.00g、2,2-ビフェノール(東京化成株式会社)2.64g、DFBP5.78g、炭酸カリウム10.32g、NMP78.93gを入れた。その後、窒素下で150℃まで加熱し、約4時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-9)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約5,000であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP12.00g、1,1,1-トリス(4-ヒドロキシフェニル)エタン(東京化成株式会社)4.30g、DFBP10.32g、炭酸カリウム8.86g、NMP82.80gを入れた。その後、窒素下で150℃まで加熱し、約1.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-10)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約7,500であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
フラスコにTMOM-BP8.00g、TM-BIP-A1.92g、DFBP6.02g、炭酸カリウム3.98g、NMP46.48gを入れた。その後、窒素下で100℃まで加熱し、約5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=70/30(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(1-11)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約4,400であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
100mLフラスコにカルバゾール(東京化成工業(株)製)8.00g、9-フルオレノン(東京化成工業(株)製)8.63g、メタンスルホン酸(東京化成工業(株)製)2.30g、PGMEA18.93gを入れた。その後、窒素下で還流するまで加熱、約1.5時間後にメタノールで沈殿させて、乾燥させることでポリマー(1-12)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約2,600であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的のポリマー溶液を得た。
フラスコに4,4’-ジヒドロキシ3,3’,5,5’-テトラメチルビフェニル5.00g、DFBP4.50g、炭酸カリウム2.97g、NMP29.11gを入れた。その後、窒素下で150℃まで加熱し、約4.5時間反応させた。反応停止後、濾過により炭酸カリウムを取り除いた。得られたろ液に対して1N-HClを加えて中性とした後、しばらく撹拌した。この希釈溶液をメタノール/水=90/10(vol/vol)溶液中に滴下し、再沈殿させ、吸引ろ過を行った。得られた沈殿物を乾燥させることで樹脂(2-1)を得た。GPCによりポリスチレン換算で測定される重量平均分子量Mwは約1,500であった。得られた樹脂をPGMEAに溶解させ、陽イオン交換樹脂と陰イオン交換樹脂を用いてイオン交換を4時間実施することで、目的の化合物溶液を得た。
合成例1で樹脂溶液(固形分17.17質量%)を得た。この樹脂溶液4.97gにTMOM-BP(本州化学株式会社)0.17g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.95g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.09g、PGMEA5.57g、PGME2.93gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例1で樹脂溶液(固形分17.17質量%)を得た。この樹脂溶液5.93gに2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.53g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.10g、PGMEA4.75g、PGME2.69gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例1で樹脂溶液(固形分17.17質量%)を得た。この樹脂溶液13.96gに1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.24g、PGMEA0.52g、PGME5.28gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例2で樹脂溶液(固形分14.96質量%)を得た。この樹脂溶液5.70gにTMOM-BP0.17g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.28g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.09g、PGMEA4.83g、PGME2.93gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例3で樹脂溶液(固形分17.90質量%)を得た。この樹脂溶液4.77gにTMOM-BP0.17g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.28g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.09g、PGMEA5.77g、PGME2.91gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例4で樹脂溶液(固形分17.39質量%)を得た。この樹脂溶液4.90gにTMOM-BP0.17g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.28g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.09g、PGMEA 4.10g、PGME4.46gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例5で樹脂溶液(固形分17.40質量%)を得た。この樹脂溶液4.90gにTMOM-BP0.17g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.28g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.09g、PGMEA4.10g、PGME1.54g、CYH2.93gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例6で樹脂溶液(固形分21.61質量%)を得た。この樹脂溶液3.76gにTMOM-BP0.16g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.22g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.08g、PGMEA3.27g、PGME1.51gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例7で樹脂溶液(固形分19.85質量%)を得た。この樹脂溶液4.09gにTMOM-BP0.16g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.22g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.08g、PGMEA2.94g、PGME1.51gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例8で樹脂溶液(固形分20.06質量%)を得た。この樹脂溶液4.05gにTMOM-BP0.16g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.22g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.08g、PGMEA2.98g、PGME1.51gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例9で樹脂溶液(固形分19.38質量%)を得た。この樹脂溶液4.19gにTMOM-BP0.16g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.22g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.08g、PGMEA2.84g、PGME1.51gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例10で樹脂溶液(固形分17.52質量%)を得た。この樹脂溶液4.87gにTMOM-BP0.17g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.28g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.09g、PGMEA5.66g、PGME2.91gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例11で樹脂溶液(固形分30.00質量%)を得た。この樹脂溶液4.33gに合成例1で得た樹脂溶液(固形分17.17質量%)1.51g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.95g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.13g、PGMEA10.31g、PGME1.77gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
比較合成例1で樹脂溶液(固形分18.37質量%)を得た。この樹脂溶液5.31gにTMOM-BP0.19g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.46g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.10g、PGMEA5.21g、PGME2.71gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
合成例11で樹脂溶液(固形分30.00質量%)を得た。この樹脂溶液4.33gにTMOM-BP0.26g、2質量%ピリジニウムp-ヒドロキシベンゼンスルホナート含有PGME1.95g、1質量%界面活性剤(DIC株式会社、メガファックR-40)含有PGMEA0.13g、PGMEA11.56g、PGME1.77gを加えて溶解させ、孔径0.1μmのポリテトラフルオロエチレン製マイクロフィルターにて濾過して、レジスト下層膜形成組成物の溶液を調製した。
比較例1及び実施例1-12で調製したレジスト下層膜形成組成物の溶液を、それぞれスピンコーターを用いてシリコンウェハー上に塗布し、ホットプレート上で240℃、350℃または400℃で60秒間焼成し、レジスト下層膜(膜厚200nm)を形成した。これらレジスト下層膜を汎用的なシンナーであるPGME/PGMEA=7/3で浸漬して、溶剤への耐性を確認した(表1)。浸漬後に膜厚減少が1%未満の場合を〇、浸漬後に膜厚減少が1%以上の場合を×と記載した。
比較例1及び実施例1-12で調製したレジスト下層膜形成組成物の溶液を、それぞれスピンコーターを用いてシリコンウェハー上に塗布した。ホットプレート上で240℃、350℃または400℃60秒間焼成し、レジスト下層膜(膜厚50nm)を形成した。これらのレジスト下層膜を、分光エリプソメーターを用いて波長193nmでの屈折率(n値)及び光学吸光係数(k値、減衰係数とも呼ぶ)を測定した(表2)。
ドライエッチング速度の測定に用いたエッチャー及びエッチングガスは以下の通り。
RIE-200NL(サムコ製):CF4
昇華物量の測定は国際公開第2007/111147号パンフレットに記載されている昇華物量測定装置を用いて実施した。比較例1及び実施例1-12で調製したレジスト下層膜形成組成物をそれぞれシリコンウエハーに塗布し、240℃、350℃または400℃60秒間焼成後に膜厚200nmになる際の昇華物量を測定した(表4)。なお、表に記載の値は実施例1-12の昇華物量/比較例1の昇華物量である。
比較例1及び実施例1-12で調製されたレジスト下層膜形成組成物を上記基板に塗布後、240℃、350℃または400℃60秒間焼成して200nmのレジスト下層膜を形成した。このレジスト硬化膜の硬度をBruker社製TI-980 triboidentorで評価した。比較例1を対照とし、比較例1に対して硬度が高いものを○と評価した(表5)。
200nm膜厚のSiO2基板、トレンチ幅50nm、ピッチ100nmのデンスパターンエリアにて埋め込み性を確認した。比較例1及び実施例1-12で調製されたレジスト下層膜形成組成物を上記基板上に塗布後、240℃、350℃または400℃60秒間焼成して約200nmのレジスト下層膜を形成した。この基板の平坦化性を日立ハイテクノロジーズ(株)製走査型電子顕微鏡(S-4800)を用いて観察し、パターン内部へのレジスト下層膜形成組成物の充填の有無を確認した(表6)。
パターン内部へレジスト下層膜形成組成物が充填されたものを〇、パターン内部へレジスト下層膜形成組成物が充填されなかったものを×と記載した。
比較例1及び実施例12で調製された各レジスト下層膜形成組成物の溶液を、スピンコーターを用いてそれぞれ酸化ケイ素被膜付きシリコンウエハー上に塗布した。ホットプレート上で350℃60秒間焼成しレジスト下層膜(膜厚200nm)を形成した。レジスト下層膜上にシリコンハードマスク形成組成物溶液を塗布し、240℃で1分間焼成しシリコンハードマスク層(膜厚30nm)を形成した。その上にレジスト溶液を塗布し、100℃で1分間焼成しレジスト層(膜厚150nm)を形成した。マスクを用いて波長193nmで露光し、露光後加熱PEB(105℃で1分間)を行った後、現像してレジストパターンを得た。その後、フッ素系ガスと酸素系ガスを用いてドライエッチングを行い、レジストパターンを酸化ケイ素被膜付きシリコンウエハーに転写した後、それぞれのパターン形状を株式会社日立ハイテクノロジー製CG-4100で観察した。
段差基板への被覆試験として、200nm膜厚のSiO2基板で、パターンが形成されていないオープンエリア(OPEN)とトレンチ幅50nm、ピッチ100nmのデンスパターンエリア(DENSE)にて被覆膜厚の比較を行った。比較例2及び実施例13で調製されたレジスト下層膜形成組成物を上記基板に塗布後、350℃で60秒間焼成して約200nmのレジスト下層膜を形成した。この基板の平坦化性を日立ハイテクノロジーズ(株)製走査型電子顕微鏡(S-4800)を用いて観察し、段差基板のトレンチエリア(パターン部)とオープンエリア(パターンなし部)との膜厚差(トレンチエリアとオープンエリアとの塗布段差でありバイアスと呼ぶ)を測定することで平坦化性を評価した。ここで、平坦化性とは、パターンが存在する部分(トレンチエリア(パターン部))と、パターンが存在しない部分(オープンエリア(パターンなし部))とで、その上部に存在する塗布された被覆物の膜厚差(Iso-denseバイアス)が小さいことを意味する。比較例2よりもバイアスの小さいものを〇と評価した。
比較例2及び実施例13で調製したレジスト下層膜形成組成物の溶液を、それぞれスピンコーターを用いてシリコンウェハー上に塗布し、ホットプレート上で350℃60秒間焼成して、200nmのレジスト下層膜を形成した。得られた膜を削り取り、室温(約20℃)から1分間に10℃ずつの割合で昇温加熱して大気中で熱重量分析を行い、重量減少の経時変化を確認した。
耐熱性評価においては、比較例2よりも重量減少率が小さなものを〇と評価した。
Claims (17)
- ROCH2-基(Rは一価の有機基、水素原子又はこれらの混合である)を有する芳香族化合物Aと、Aとは異なる炭素原子数120以下の芳香族化合物Bとが、連結基-O-を介して交互に結合した繰り返し構造単位であって、1個のAに対して1~6個のBが結合した繰り返し構造単位を含むポリマー(X)、及び
溶剤
を含むレジスト下層膜形成組成物。 - 式(1)におけるRが、フェニル基、ナフチル基若しくはアントラセニル基で置換されていてもよく、酸素原子、窒素原子若しくはカルボニル基で中断されていてもよい、飽和若しくは不飽和の直鎖若しくは分岐のC2-C20脂肪族若しくはC3-C20脂環式炭化水素基、水素原子、又はこれらの混合である、請求項2に記載のレジスト下層膜形成組成物。
- 式(1)におけるB1が、下記式2で表される、請求項2に記載のレジスト下層膜形成組成物。
(式(2)中、
C1、C2はそれぞれ独立して、炭素原子数6~48のヘテロ原子を含んでも良い炭素原子数6~48の芳香族環、又はヘテロ原子を含んでもよい炭素原子数6~48の芳香族環を含む炭化水素基を表し、
Yは単結合、カルボニル基、スルホニル基、-CR1 2-基、又は-(CF3)C(CF3)-基を表し、
R1は酸素原子、カルボニル基、窒素原子、炭素炭素二重結合、若しくは炭素炭素三重結合で中断されていても良く、炭素炭素二重結合、若しくは炭素炭素三重結合が末端に結合しても良い炭素原子数1~10のアルキル基、ヒドロキシ基、水素原子、ハロゲン、炭素原子数6~20の芳香族炭化水素基、又は-NR2 2を表し、
R2は炭素原子数1~10の鎖状又は環状のアルキル基を表し、
iは0又は1であり、
点線は酸素原子との結合を表す。) - 式(2)におけるiが1である、請求項4に記載のレジスト下層膜形成組成物。
- 式(1)におけるA1がフェノール性水酸基を有さない、請求項2乃至6のいずれか一項に記載のレジスト下層膜形成組成物。
- ポリマー(X)が、置換されていてもよい炭素原子数6~30の芳香族炭化水素基を少なくとも一の末端に有する、請求項1乃至6のいずれか一項に記載のレジスト下層膜形成組成物。
- ポリマー(X)と架橋反応可能な膜材料(Z)を更に含む、請求項1乃至8のいずれか一項に記載のレジスト下層膜形成組成物。
- 架橋剤を更に含む、請求項1乃至9のいずれか一項に記載のレジスト下層膜形成組成物。
- 酸及び/又は酸発生剤を更に含む、請求項1乃至10のいずれか一項に記載のレジスト下層膜形成組成物。
- 界面活性剤を更に含む、請求項1乃至11のいずれか一項に記載のレジスト下層膜形成組成物。
- 前記溶剤が160℃以上の沸点を有する溶媒を含む請求項1乃至12のいずれか一項に記載のレジスト下層膜形成組成物。
- 請求項1乃至13のいずれか一項に記載の組成物からなる塗布膜の焼成物であることを特徴とするレジスト下層膜。
- 半導体基板上に請求項1乃至13のいずれか一項に記載の組成物を用いてレジスト下層膜を形成する工程、
形成されたレジスト下層膜の上にレジスト膜を形成する工程、
形成されたレジスト膜に対する光又は電子線の照射と現像によりレジストパターンを形成する工程、
形成されたレジストパターンを介して前記レジスト下層膜をエッチングし、パターン化する工程、及び
パターン化されたレジスト下層膜を介して半導体基板を加工する工程
を含む半導体装置の製造方法。 - 半導体基板上に請求項1乃至13のいずれか一項に記載の組成物を用いてレジスト下層膜を形成する工程、
形成されたレジスト下層膜の上にハードマスクを形成する工程、
形成されたハードマスクの上にレジスト膜を形成する工程、
形成されたレジスト膜に対する光又は電子線の照射と現像によりレジストパターンを形成する工程、
形成されたレジストパターンを介して前記ハードマスクをエッチングし、パターン化する工程、及び
パターン化されたハードマスクを介して前記レジスト下層膜をエッチングし、パターン化する工程、及び
パターン化されたレジスト下層膜を介して半導体基板を加工する工程
を含む半導体装置の製造方法。 - レジスト下層膜を形成する工程をナノインプリント法によって行う請求項15又は16に記載の半導体装置の製造方法。
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WO2014171326A1 (ja) * | 2013-04-17 | 2014-10-23 | 日産化学工業株式会社 | レジスト下層膜形成組成物 |
WO2018186310A1 (ja) * | 2017-04-03 | 2018-10-11 | 日産化学株式会社 | 光架橋基を有するポリエーテル樹脂を含む段差基板被覆組成物 |
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