WO2022163673A1 - 酸二無水物の反応生成物を含むレジスト下層膜形成組成物 - Google Patents
酸二無水物の反応生成物を含むレジスト下層膜形成組成物 Download PDFInfo
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- WO2022163673A1 WO2022163673A1 PCT/JP2022/002758 JP2022002758W WO2022163673A1 WO 2022163673 A1 WO2022163673 A1 WO 2022163673A1 JP 2022002758 W JP2022002758 W JP 2022002758W WO 2022163673 A1 WO2022163673 A1 WO 2022163673A1
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- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- SKTCDJAMAYNROS-UHFFFAOYSA-N methoxycyclopentane Chemical compound COC1CCCC1 SKTCDJAMAYNROS-UHFFFAOYSA-N 0.000 description 1
- BDJSOPWXYLFTNW-UHFFFAOYSA-N methyl 3-methoxypropanoate Chemical compound COCCC(=O)OC BDJSOPWXYLFTNW-UHFFFAOYSA-N 0.000 description 1
- CWKLZLBVOJRSOM-UHFFFAOYSA-N methyl pyruvate Chemical compound COC(=O)C(C)=O CWKLZLBVOJRSOM-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- GNVRJGIVDSQCOP-UHFFFAOYSA-N n-ethyl-n-methylethanamine Chemical compound CCN(C)CC GNVRJGIVDSQCOP-UHFFFAOYSA-N 0.000 description 1
- 125000001298 n-hexoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 239000013110 organic ligand Substances 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- QUBQYFYWUJJAAK-UHFFFAOYSA-N oxymethurea Chemical compound OCNC(=O)NCO QUBQYFYWUJJAAK-UHFFFAOYSA-N 0.000 description 1
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 1
- 125000000636 p-nitrophenyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)[N+]([O-])=O 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- SLIUAWYAILUBJU-UHFFFAOYSA-N pentacene Chemical compound C1=CC=CC2=CC3=CC4=CC5=CC=CC=C5C=C4C=C3C=C21 SLIUAWYAILUBJU-UHFFFAOYSA-N 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 125000002081 peroxide group Chemical group 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- XDJOIMJURHQYDW-UHFFFAOYSA-N phenalene Chemical compound C1=CC(CC=C2)=C3C2=CC=CC3=C1 XDJOIMJURHQYDW-UHFFFAOYSA-N 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 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
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- YWVYZMVYXAVAKS-UHFFFAOYSA-N pyridin-1-ium;trifluoromethanesulfonate Chemical compound C1=CC=[NH+]C=C1.[O-]S(=O)(=O)C(F)(F)F YWVYZMVYXAVAKS-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- SBYHFKPVCBCYGV-UHFFFAOYSA-N quinuclidine Chemical compound C1CC2CCN1CC2 SBYHFKPVCBCYGV-UHFFFAOYSA-N 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000005546 reactive sputtering Methods 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 239000007787 solid Substances 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
- 239000001589 sorbitan tristearate Substances 0.000 description 1
- 235000011078 sorbitan tristearate Nutrition 0.000 description 1
- 229960004129 sorbitan tristearate Drugs 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 125000005156 substituted alkylene group Chemical group 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000008053 sultones Chemical group 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000006158 tetracarboxylic acid group Chemical group 0.000 description 1
- IFLREYGFSNHWGE-UHFFFAOYSA-N tetracene Chemical compound C1=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C21 IFLREYGFSNHWGE-UHFFFAOYSA-N 0.000 description 1
- GVIJJXMXTUZIOD-UHFFFAOYSA-N thianthrene Chemical compound C1=CC=C2SC3=CC=CC=C3SC2=C1 GVIJJXMXTUZIOD-UHFFFAOYSA-N 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- BFGQTWYXWNCTSX-UHFFFAOYSA-N triazine-4,5-dione Chemical compound O=C1C=NN=NC1=O BFGQTWYXWNCTSX-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
- 125000005580 triphenylene group Chemical group 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/3236—Heterocylic compounds
- C08G59/3245—Heterocylic compounds containing only nitrogen as a heteroatom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
-
- 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
-
- 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
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/1053—Imaging affecting physical property or radiation sensitive material, or producing nonplanar or printing surface - process, composition, or product: radiation sensitive composition or product or process of making binder containing
- Y10S430/1055—Radiation sensitive composition or product or process of making
Definitions
- the present invention relates to compositions used in lithographic processes in semiconductor manufacturing, particularly in cutting-edge (ArF, EUV, EB, etc.) lithographic processes.
- the present invention also relates to a method of manufacturing a substrate with a resist pattern to which the resist underlayer film is applied, and a method of manufacturing a semiconductor device.
- microfabrication by lithography using a resist composition has been performed in the manufacture of semiconductor devices.
- a thin film of a photoresist composition is formed on a semiconductor substrate such as a silicon wafer, exposed to actinic rays such as ultraviolet rays through a mask pattern on which a device pattern is drawn, and developed.
- actinic rays such as ultraviolet rays
- This is a processing method in which the substrate is etched using the obtained photoresist pattern as a protective film to form fine unevenness corresponding to the pattern on the substrate surface.
- Patent Document 1 discloses a composition for forming a resist underlayer film containing a polymer obtained by reacting a tetracarboxylic dianhydride having an alicyclic or aliphatic structure with a diepoxy-containing compound.
- Patent Document 2 discloses a composition for forming a resist underlayer film containing a polymer obtained by reacting a specific heterocyclic compound with a diepoxy-containing compound.
- Properties required for the resist underlayer film include, for example, no intermixing with the resist film formed on the upper layer (insolubility in the resist solvent), and a faster dry etching rate than the resist film. mentioned.
- the line width of the formed resist pattern is 32 nm or less, and the resist underlayer film for EUV exposure is formed thinner than before.
- it is difficult to form a defect-free uniform film because pinholes and aggregation are likely to occur due to the influence of the substrate surface, the polymer used, and the like.
- a solvent capable of dissolving the resist film usually an organic solvent, is used to remove the unexposed portion of the resist film, leaving the exposed portion of the resist film as a resist pattern. is sometimes adopted. In such a negative development process, improvement of the adhesion of the resist pattern is a major issue.
- LWR Line Width Roughness, line width roughness, line width fluctuation (roughness)
- An object of the present invention is to provide a composition for forming a resist underlayer film capable of forming a desired resist pattern, and a method for forming a resist pattern using the resist underlayer film-forming composition, which solves the above problems. .
- the present invention includes the following.
- a 1 , A 2 , A 3 , A 4 , A 5 and A 6 each independently represent a hydrogen atom, a methyl group or an ethyl group
- Q 1 represents a divalent organic group
- R 1 represents a tetravalent organic group containing an aromatic ring structure having 6 to 40 carbon atoms
- L 1 and L 2 are each independently a hydrogen atom, optionally substituted with a hydroxy group
- an oxygen atom represents an alkyl group having 1 to 10 carbon atoms which may be interrupted by
- a resist underlayer film-forming composition comprising a polymer having a unit structure represented by and a solvent.
- the polymer has the following formula (a-2): (In formula (a-2), Y 1 is a single bond, an oxygen atom, a sulfur atom, a halogen atom, an alkylene group having 1 to 10 carbon atoms optionally substituted by an aryl group having 6 to 40 carbon atoms, or a sulfonyl n1 T 1 and n2 T 2 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and may be bonded to each other to bridge two benzene rings.
- n1 and n2 each independently represents an integer of 0 to 4, Q 1 , A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , L 1 and L 2 are as defined in [1] is. )
- R 1 represents an optionally substituted alkyl group having 1 to 6 carbon atoms, phenyl group, pyridyl group, halogeno group or hydroxy group
- R 2 represents hydrogen
- Atom, an alkyl group having 1 to 6 carbon atoms, a hydroxy group, a halogeno group, or an ester group represented by -C( O)O-X, where X is an optionally substituted carbon atom number 1
- R 3 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a hydroxy group or a halogeno group
- R 4 represents a direct bond or a divalent organic group having 1 to 8 carbon atoms.
- R 5 represents a divalent organic group having 1 to 8 carbon atoms
- A represents an aromatic ring or an aromatic heterocycle
- t represents 0 or 1
- u represents 1 or 2 .
- a resist underlayer film characterized by being a baked product of a coating film comprising the resist underlayer film-forming composition according to any one of [1] to [10].
- a step of forming a resist underlayer film comprising the resist underlayer film-forming composition according to any one of [1] to [10] on a semiconductor substrate; forming a resist film on the resist underlayer film; a step of forming a resist pattern by irradiating the resist film with light or an electron beam and then developing; forming a patterned resist underlayer film by etching the resist underlayer film through the formed resist pattern; a step of processing a semiconductor substrate with the patterned resist underlayer film;
- a method of manufacturing a semiconductor device comprising:
- the resist underlayer film formed from the above resist underlayer film-forming composition exhibits excellent resistance to organic solvents used in the photoresist formed on the underlayer film, and is extremely thin (10 nm thick). below), a resist underlayer film exhibiting good film thickness uniformity can be formed.
- the critical resolution size at which resist pattern collapse after development is not observed is smaller and finer than that of conventional resist underlayer films. a resist pattern can be formed.
- the resist underlayer film-forming composition of the present invention contains a polymer and a solvent, and the polymer has the following formula (I): (In formula (I), A 1 , A 2 , A 3 , A 4 , A 5 and A 6 each independently represent a hydrogen atom, a methyl group or an ethyl group, and Q 1 represents a divalent organic group.
- R 1 represents a tetravalent organic group containing an aromatic ring structure having 6 to 40 carbon atoms
- L 1 and L 2 are each independently a hydrogen atom, optionally substituted with a hydroxy group
- an oxygen atom represents an alkyl group having 1 to 10 carbon atoms which may be interrupted by It is a polymer having a unit structure represented by
- Examples of the aromatic ring structure having 6 to 40 carbon atoms include benzene, naphthalene, anthracene, acenaphthene, fluorene, triphenylene, phenalene, phenanthrene, indene, indane, indacene, pyrene, chrysene, perylene, naphthacene, pentacene, coronene, and heptacene. , benzo[a]anthracene, dibenzophenanthrene, and dibenzo[a,j]anthracene.
- the R 1 is represented by the following formula (III):
- Y 1 represents a single bond, an oxygen atom, a sulfur atom, a halogen atom, an alkylene group having 1 to 10 carbon atoms which may be substituted by an aryl group having 6 to 40 carbon atoms, or a sulfonyl group.
- n1 T 1 and n2 T 2 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, which may be mutually bonded to bridge two benzene rings
- n1 and n2 each independently represents an integer of 0 to 4
- * is the point of attachment to the carbon atom of the carbonyl group to which R1 is attached.
- * is the point of attachment to the carbon atom of the carbonyl group to which R1 is attached.
- Y 1 is preferably a sulfonyl group.
- the halogen atoms include fluorine, chlorine, iodine, and bromine.
- Y 1 is preferably a sulfonyl group, and T 1 and T 2 are preferably hydrogen atoms.
- Examples of the aryl group having 6 to 40 carbon atoms include a phenyl group, o-methylphenyl group, m-methylphenyl group, p-methylphenyl group, o-chlorophenyl group, m-chlorophenyl group and p-chlorophenyl group.
- phenanthryl group o-fluorophenyl group, p-fluorophenyl group, o-methoxyphenyl group, p-methoxyphenyl group, p-nitrophenyl group, p-cyanophenyl group, ⁇ -naphthyl group, ⁇ -naphthyl group, o- biphenylyl group, m-biphenylyl group, p-biphenylyl group, 1-anthryl group, 2-anthryl group, 9-anthryl group, 1-phenanthryl group, 2-phenanthryl group, 3-phenanthryl group, 4-phenanthryl group and 9- A phenanthryl group is mentioned.
- alkylene group having 1 to 10 carbon atoms examples include methylene group, ethylene group, n-propylene group, isopropylene group, cyclopropylene group, n-butylene group, isobutylene group, s-butylene group, t-butylene group, cyclobutylene group, 1-methyl-cyclopropylene group, 2-methyl-cyclopropylene group, n-pentylene group, 1-methyl-n-butylene group, 2-methyl-n-butylene group, 3-methyl-n-butylene group, 1,1-dimethyl-n-propylene group, 1,2-dimethyl-n-propylene group, 2,2-dimethyl-n-propylene group, 1-ethyl-n-propylene group, cyclopentylene group, 1- methyl-cyclobutylene group, 2-methyl-cyclobutylene group, 3-methyl-cyclobutylene group, 1,2-dimethyl-cyclopropylene group, 2,3-di
- an alkyl group having 1 to 4 carbon atoms is preferable, and methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, s-butyl group, t It is preferably selected from a -butyl group, preferably a methyl group or an ethyl group.
- the R 1 is represented by the following formula (2-1):
- Y 1 is a single bond, an oxygen atom, a sulfur atom, a halogen atom, an alkylene group having 1 to 10 carbon atoms optionally substituted by an aryl group having 6 to 40 carbon atoms, or a sulfonyl n1 T 1 and n2 T 2 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and may be bonded to each other to bridge two benzene rings.
- n1 and n2 each independently represents an integer of 0 to 4.
- the polymer may have a heterocyclic structure.
- a reaction product of a compound represented by the formula (2-1) and a compound containing a heterocyclic ring having two reactive groups reactive with the acid dianhydride represented by the formula (2-1) can be In the case of the reaction product, the reaction product contains a heterocyclic structure as a repeating unit structure. The details of the heterocycle will be described later.
- the Q 1 may include an alkenyl or alkynyl group having 2 to 10 carbon atoms.
- Q 1 is not limited as long as it is a divalent organic group that exhibits the effects of the present application, it is preferably derived from a diepoxy-containing compound containing two epoxy groups. Specific examples include structures derived from compounds shown in (10-a) to (10-k) below.
- the Q 1 may contain a heterocyclic structure.
- the heterocyclic structures include furan, thiophene, pyrrole, imidazole, pyran, pyridine, pyrimidine, pyrazine, pyrrolidine, piperidine, piperazine, morpholine, indole, purine, quinoline, isoquinoline, quinuclidine, chromene, thianthrene, phenothiazine, phenoxazine, xanthene, acridine, phenazine, carbazole, triazineone, triazinedione and triazinetrione, or the heterocyclic structures shown in (10-h) to (10-k) above. Among these, triazinetrione is preferred, and specifically, structures represented by the above formulas (10-h) to (10-k) are preferred.
- the polymer has the following formula (a-1): (In formula (a-1), Y 1 , T 1 , T 2 , n1 and n2 are as defined above, and L 1 and L 2 are each independently substituted with a hydrogen atom or a hydroxy group. represents an alkyl group having 1 to 10 carbon atoms which may be optionally interrupted by an oxygen atom, and * represents a bonding portion with a polymer residue.).
- L 1 and L 2 are preferably C 1-10 alkyl groups substituted with hydroxy groups and interrupted with oxygen atoms.
- the alkyl group having 1 to 10 carbon atoms which may be interrupted by an oxygen atom means that an ether bond is included between one or two or more carbon-carbon bonds of the alkyl group.
- Preferred structures of L 1 and L 2 are represented by the solvent used during the reaction (for example, (3d-1) or (3d-2) below), as in the synthesis examples described in the Examples section. solvent) may be generated by reacting with the carboxy group derived from the above compound (a).
- the polymer has the following formula (a-2): (In formula (a-2), Y 1 , T 1 , T 2 , n1 and n2 are as defined above, L 1 and L 2 are as defined above, A 1 , A 2 , A 3 , A 4 , A 5 and A 6 each independently represent a hydrogen atom, a methyl group or an ethyl group, and Q 1 represents a divalent organic group.).
- the weight average molecular weight of the polymer is preferably 500-50,000, more preferably 1,000-30,000.
- the weight average molecular weight can be measured, for example, by the gel permeation chromatography method described in Examples.
- the proportion of the polymer contained in the entire composition for forming a resist underlayer film of the present invention is usually 0.05% by mass to 3.0% by mass, and 0.08% by mass to 2.0% by mass, It is 0.1% by mass to 1.0% by mass.
- Examples of the organic solvent contained in the resist underlayer film-forming composition of the present invention include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol, Propylene Glycol Monomethyl Ether, Propylene Glycol Monoethyl Ether, Propylene Glycol Monomethyl Ether Acetate, Propylene Glycol Propyl Ether Acetate, Toluene, Xylene, Methyl Ethyl Ketone, Methyl Isobutyl Ketone, Cyclopentanone, Cyclohexanone, Cycloheptanone, 4-Methyl-2-Pene Tanol, methyl 2-hydroxyisobutyrate, ethyl 2-hydroxyisobutyrate, ethyl ethoxyacetate, 2-hydroxyethyl
- propylene glycol monomethyl ether propylene glycol monomethyl ether acetate, ethyl lactate, butyl lactate, and cyclohexanone are preferred.
- Propylene glycol monomethyl ether and propylene glycol monomethyl ether acetate are particularly preferred.
- the end of the polymer may be blocked with a compound.
- the compound may contain an optionally substituted aliphatic ring.
- the aliphatic ring is preferably a monocyclic or polycyclic aliphatic ring having 3 to 10 carbon atoms.
- the monocyclic or polycyclic aliphatic ring having 3 to 10 carbon atoms includes cyclopropane, cyclobutane, cyclopentane, cyclohexane, cyclohexene, cycloheptane, cyclooctane, cyclononane, cyclodecane, spirobicyclopentane, bicyclo[ 2.1.0]pentane, bicyclo[3.2.1]octane, tricyclo[3.2.1.0 2,7 ]octane, spiro[3,4]octane, norbornane, norbornene, tricyclo[3.3 .1.1 3,7 ]decane (adamantane) and the like.
- the polycyclic aliphatic ring is preferably a bicyclo ring or a tricyclo ring.
- bicyclo ring examples include norbornane, norbornene, spirobicyclopentane, bicyclo[2.1.0]pentane, bicyclo[3.2.1]octane, spiro[3,4]octane and the like.
- tricyclo ring examples include tricyclo[3.2.1.0 2,7 ]octane and tricyclo[3.3.1.1 3,7 ]decane (adamantane).
- aliphatic ring optionally substituted with the substituents means that one or more hydrogen atoms in the aliphatic ring may be substituted with the substituents described below.
- the substituent is a hydroxy group, a linear or branched alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, or 1 to 1 carbon atoms optionally interrupted by an oxygen atom; It is preferably selected from ten acyloxy groups and carboxy groups.
- alkoxy group having 1 to 20 carbon atoms examples include methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, i-butoxy group, s-butoxy group, t-butoxy group, n -pentyloxy group, 1-methyl-n-butoxy group, 2-methyl-n-butoxy group, 3-methyl-n-butoxy group, 1,1-dimethyl-n-propoxy group, 1,2-dimethyl-n -propoxy group, 2,2-dimethyl-n-propoxy group, 1-ethyl-n-propoxy group, n-hexyloxy group, 1-methyl-n-pentyloxy group, 2-methyl-n-pentyloxy group, 3-methyl-n-pentyloxy group, 4-methyl-n-pentyloxy group, 1,1-dimethyl-n-butoxy group, 1,2-dimethyl-n-butoxy group, 1,3-dimethyl-n- butoxy group, 2,2-
- the aliphatic ring preferably has at least one unsaturated bond (eg double bond, triple bond).
- the aliphatic ring preferably has 1 to 3 unsaturated bonds.
- the aliphatic ring preferably has one or two unsaturated bonds.
- the unsaturated bond is preferably a double bond.
- Specific examples of the compound containing an aliphatic ring optionally substituted with the substituent include the compounds described below. Specific examples also include compounds in which the carboxy group in the following specific examples is replaced with a hydroxy group, an amino group, or a thiol group.
- the compound is represented by the following formulas (1) and (2):
- R 1 represents an optionally substituted alkyl group having 1 to 6 carbon atoms, phenyl group, pyridyl group, halogeno group or hydroxy group
- R 2 represents hydrogen
- R 3 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a hydroxy group or a halogeno group
- R 4 represents a direct bond or a divalent organic group having 1 to 8 carbon atoms.
- R 5 represents a divalent organic group having 1 to 8 carbon atoms
- A represents an aromatic ring or an aromatic heterocycle
- t represents 0 or 1
- u represents 1 or 2 .
- the polymer terminal structures represented by the above formulas (1) and (2) are obtained by reacting the polymer with a compound represented by the following formula (1a) and/or a compound represented by the following formula (2a). can be manufactured by
- Examples of compounds represented by the formula (2a) include compounds represented by the following formula.
- the curing catalyst contained as an optional component in the resist underlayer film-forming composition of the present invention is preferably an acid generator.
- the acid generator include p-toluenesulfonic acid, trifluoromethanesulfonic acid, pyridinium-p-toluenesulfonate (pyridinium-p-toluenesulfonic acid), pyridinium-p-hydroxybenzenesulfonic acid (p-phenolsulfonic acid pyridinium salt), pyridinium-trifluoromethanesulfonic acid, salicylic acid, camphorsulfonic acid, 5-sulfosalicylic acid, 4-chlorobenzenesulfonic acid, 4-hydroxybenzenesulfonic acid, benzenedisulfonic acid, 1-naphthalenesulfonic acid, citric acid, benzoic acid and sulfonic acid compounds such as hydroxybenzoic acid and carboxylic acid compounds.
- the cross-linking agent contained as an optional component in the resist underlayer film-forming composition of the present invention includes, for example, hexamethoxymethylmelamine, tetramethoxymethylbenzoguanamine, 1,3,4,6-tetrakis(methoxymethyl)glycoluril (tetramethoxy methyl glycoluril) (POWDERLINK® 1174), 1,3,4,6-tetrakis(butoxymethyl)glycoluril, 1,3,4,6-tetrakis(hydroxymethyl)glycoluril, 1,3-bis (hydroxymethyl)urea, 1,1,3,3-tetrakis(butoxymethyl)urea and 1,1,3,3-tetrakis(methoxymethyl)urea.
- cross-linking agent of the present application is a nitrogen-containing compound having 2 to 6 substituents per molecule represented by the following formula (1d) that binds to a nitrogen atom, as described in International Publication No. 2017/187969. There may be.
- R 1 represents a methyl group or an ethyl group.
- the nitrogen-containing compound having 2 to 6 substituents represented by the formula (1d) in one molecule may be a glycoluril derivative represented by the following formula (1E).
- R 1s each independently represent a methyl group or an ethyl group
- R 2 and R 3 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group.
- Examples of the glycoluril derivative represented by the formula (1E) include compounds represented by the following formulas (1E-1) to (1E-6).
- the nitrogen-containing compound having 2 to 6 substituents represented by the formula (1d) in one molecule has 2 to 6 substituents in the molecule represented by the following formula (2d) bonded to the nitrogen atom. It can be obtained by reacting a nitrogen-containing compound with at least one compound represented by the following formula (3d).
- R 1 represents a methyl group or an ethyl group
- R 4 represents an alkyl group having 1 to 4 carbon atoms.
- the glycoluril derivative represented by the formula (1E) is obtained by reacting a glycoluril derivative represented by the following formula (2E) with at least one compound represented by the formula (3d).
- a nitrogen-containing compound having 2 to 6 substituents represented by the above formula (2d) in one molecule is, for example, a glycoluril derivative represented by the following formula (2E).
- R 2 and R 3 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group
- R 4 each independently represent an alkyl group having 1 to 4 carbon atoms. represents.
- Examples of the glycoluril derivative represented by the formula (2E) include compounds represented by the following formulas (2E-1) to (2E-4).
- examples of the compound represented by the formula (3d) include compounds represented by the following formulas (3d-1) and (3d-2).
- cross-linking agent may be a cross-linkable compound represented by the following formula (G-1) or formula (G-2) described in International Publication 2014/208542.
- Q 1 represents a single bond or a monovalent organic group
- R 1 and R 4 each represent an alkyl group having 2 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms.
- 2 to 10 alkyl group R 2 and R 5 each represent a hydrogen atom or a methyl group
- R 3 and R 6 each represent an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 40 carbon atoms indicates a group.
- n1 is an integer of 1 ⁇ n1 ⁇ 3, n2 is an integer of 2 ⁇ n2 ⁇ 5, n3 is an integer of 0 ⁇ n3 ⁇ 3, n4 is an integer of 0 ⁇ n4 ⁇ 3, and 3 ⁇ (n1+n2+n3+n4) ⁇ 6.
- n5 is an integer satisfying 1 ⁇ n5 ⁇ 3, n6 is an integer satisfying 1 ⁇ n6 ⁇ 4, n7 is an integer satisfying 0 ⁇ n7 ⁇ 3, n8 is an integer satisfying 0 ⁇ n8 ⁇ 3, and 2 ⁇ (n5+n6+n7+n8) ⁇ 5 show.
- m1 represents an integer from 2 to 10; )
- the crosslinkable compound represented by the above formula (G-1) or formula (G-2) comprises a compound represented by the following formula (G-3) or formula (G-4) and a hydroxyl group-containing ether compound or carbon atom It may be obtained by reaction with alcohols of numbers 2 to 10.
- Q 2 represents a single bond or an m2-valent organic group.
- R 8 , R 9 , R 11 and R 12 each represent a hydrogen atom or a methyl group, and R 7 and R 10 each have 1 carbon atom.
- n9 is an integer of 1 ⁇ n9 ⁇ 3, n10 is an integer of 2 ⁇ n10 ⁇ 5, n11 is an integer of 0 ⁇ n11 ⁇ 3, n12 is an integer of 0 ⁇ n12 ⁇ 3, and 3 ⁇ (n9+n10+n11+n12) ⁇ 6. show.
- n13 is an integer satisfying 1 ⁇ n13 ⁇ 3
- n14 is an integer satisfying 1 ⁇ n14 ⁇ 4
- n15 is an integer satisfying 0 ⁇ n15 ⁇ 3
- n16 is an integer satisfying 0 ⁇ n16 ⁇ 3, and 2 ⁇ (n13+n14+n15+n16) ⁇ 5.
- m2 represents an integer from 2 to 10; )
- Me represents a methyl group.
- the content of the cross-linking agent is, for example, 1% by mass to 50% by mass, preferably 5% by mass to 30% by mass, relative to the reaction product.
- a surfactant may be further added to the resist underlayer film-forming composition of the present invention in order to prevent pinholes, striations, and the like from occurring and to further improve coatability against surface unevenness.
- surfactants include polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, and polyoxyethylene oleyl ether, polyoxyethylene octylphenol ether, and polyoxyethylene nonylphenol ether.
- Polyoxyethylene alkyl allyl ethers such as polyoxyethylene/polyoxypropylene block copolymers, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, sorbitan tristearate, etc.
- sorbitan fatty acid esters polyoxyethylene sorbitan such as polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan tristearate
- Nonionic surfactants such as fatty acid esters, Ftop EF301, EF303, EF352 (manufactured by Tochem Products Co., Ltd., trade names), Megafac F171, F173, R-30 (manufactured by Dainippon Ink Co., Ltd., commercial products name), Florard FC430, FC431 (manufactured by Sumitomo 3M Co., Ltd., trade name), Asahiguard AG710, Surflon S-382, SC101, SC102, SC103, SC104, SC105, SC106 (manufactured by Asahi Glass Co., Ltd., trade name), etc.
- organosiloxane polymer KP341 manufactured by Shin-Etsu Chemical Co., Ltd.
- the blending amount of these surfactants is usually 2.0% by mass or less, preferably 1.0% by mass or less, based on the total solid content of the resist underlayer film-forming composition of the present invention.
- These surfactants may be added singly or in combination of two or more.
- the resist underlayer film-forming composition of the present invention is preferably an electron beam resist underlayer film-forming composition or an EUV resist underlayer film-forming composition used in an electron beam (EB) drawing process and an EUV exposure process. It is preferably an EUV resist underlayer film-forming composition.
- the resist underlayer film according to the present invention can be produced by applying the resist underlayer film-forming composition described above onto a semiconductor substrate and baking the composition.
- the resist underlayer film according to the present invention is preferably an electron beam resist underlayer film or an EUV resist underlayer film.
- Semiconductor substrates to which the resist underlayer film-forming composition of the present invention is applied include, for example, silicon wafers, germanium wafers, and compound semiconductor wafers such as gallium arsenide, indium phosphide, gallium nitride, indium nitride, and aluminum nitride. be done.
- the inorganic film is formed by, for example, an ALD (atomic layer deposition) method, a CVD (chemical vapor deposition) method, a reactive sputtering method, an ion plating method, or a vacuum deposition method. It is formed by a spin coating method (spin on glass: SOG).
- the inorganic film examples include a polysilicon film, a silicon oxide film, a silicon nitride film, a BPSG (Boro-Phospho Silicate Glass) film, a titanium nitride film, a titanium oxynitride film, a tungsten film, a gallium nitride film, and a gallium arsenide film. is mentioned.
- the resist underlayer film-forming composition of the present invention is applied onto such a semiconductor substrate by a suitable coating method such as a spinner or coater. Thereafter, a resist underlayer film is formed by baking using a heating means such as a hot plate. Baking conditions are appropriately selected from a baking temperature of 100° C. to 400° C. and a baking time of 0.3 minutes to 60 minutes. Preferably, the baking temperature is 120° C. to 350° C. and the baking time is 0.5 minutes to 30 minutes, and more preferably the baking temperature is 150° C. to 300° C. and the baking time is 0.8 minutes to 10 minutes.
- the film thickness of the resist underlayer film to be formed is, for example, 0.001 ⁇ m (1 nm) to 10 ⁇ m, 0.002 ⁇ m (2 nm) to 1 ⁇ m, 0.003 ⁇ m (3 nm) to 0.5 ⁇ m (500 nm), 0.001 ⁇ m (1 nm).
- a method of manufacturing a patterned substrate includes the following steps. Usually, it is manufactured by forming a photoresist layer on a resist underlayer film.
- the photoresist formed by coating and baking on the resist underlayer film by a method known per se is not particularly limited as long as it is sensitive to the light used for exposure. Both negative and positive photoresists can be used.
- positive photoresist composed of novolac resin and 1,2-naphthoquinonediazide sulfonic acid ester;
- a chemically amplified photoresist comprising a low-molecular compound that decomposes to increase the alkali dissolution rate of the photoresist, an alkali-soluble binder, and a photoacid generator, and a binder having a group that decomposes with an acid to increase the alkali dissolution rate.
- Examples include V146G (trade name) manufactured by JSR Corporation, APEX-E (trade name) manufactured by Shipley, PAR710 (trade name) manufactured by Sumitomo Chemical Co., Ltd., AR2772 (trade name) and SEPR430 (trade name) manufactured by Shin-Etsu Chemical Co., Ltd., and the like. Also, for example, Proc. SPIE, Vol. 3999, 330-334 (2000), Proc. SPIE, Vol. 3999, 357-364 (2000), and Proc. SPIE, Vol. 3999, 365-374 (2000). It may also be a so-called metal-containing resist containing metal (metal resist).
- resist compositions include the following.
- Resin A having a repeating unit having an acid-decomposable group whose polar group is protected by a protective group that is released by the action of an acid, and an actinic ray-sensitive compound comprising a compound represented by general formula (11) sensitive or radiation sensitive resin composition.
- m represents an integer of 1-6.
- R 1 and R 2 each independently represent a fluorine atom or a perfluoroalkyl group.
- L 1 represents -O-, -S-, -COO-, -SO 2 -, or -SO 3 -.
- L2 represents an optionally substituted alkylene group or a single bond.
- W1 represents an optionally substituted cyclic organic group.
- M + represents a cation.
- (ii) Contains a compound having a metal-oxygen covalent bond and a solvent, and the metal element constituting the compound belongs to periods 3 to 7 of groups 3 to 15 of the periodic table, extreme ultraviolet rays Or a metal-containing film-forming composition for electron beam lithography.
- a radioactive resin composition a polymer having a first structural unit represented by the following formula (21) and a second structural unit represented by the following formula (22) containing an acid-labile group; and an acid generator.
- Ar is a group obtained by removing (n+1) hydrogen atoms from arene having 6 to 20 carbon atoms.
- R 1 is a hydroxy group, a sulfanyl group, or a monovalent group having 1 to 20 carbon atoms.
- n is an integer of 0 to 11.
- R 2 is a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group. is.
- R 3 is a monovalent group having 1 to 20 carbon atoms containing the above acid-labile group.
- Z is a single bond, an oxygen atom or a sulfur atom.
- R4 is a hydrogen atom, fluorine atom, methyl group or trifluoromethyl group.
- R 2 represents an alkyl group having 1 to 6 carbon atoms which may have a halogen atom, a hydrogen atom or a halogen atom
- X 1 is a single bond
- -CO-O-* or -CO-NR 4 -* * represents a bond with -Ar
- R 4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- Ar is one or more groups selected from the group consisting of a hydroxy group and a carboxyl group represents an aromatic hydrocarbon group having 6 to 20 carbon atoms which may have ]
- a resist composition that generates acid upon exposure and whose solubility in a developer changes due to the action of the acid, Containing a base component (A) whose solubility in a developer changes under the action of an acid and a fluorine additive component (F) which exhibits decomposability in an alkaline developer
- the fluorine additive component (F) includes a structural unit (f1) containing a base dissociable group and a structural unit (f2) containing a group represented by the following general formula (f2-r-1): fluorine A resist composition comprising a resin component (F1).
- each Rf 21 is independently a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group, a hydroxyalkyl group, or a cyano group.
- n" is an integer of 0 to 2. * is a bond.
- each R is independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 5 carbon atoms.
- X is a divalent linking group having no acid-labile site.
- a aryl is an optionally substituted divalent aromatic cyclic group.
- X 01 is a single bond or a divalent linking group.
- Each R 2 is independently an organic group having a fluorine atom.
- Metal-containing resist compositions include, for example, coatings containing metal oxo-hydroxo networks having organic ligands via metal carbon bonds and/or metal carboxylate bonds.
- Inorganic oxo/hydroxo-based compositions examples include the following.
- a resist film containing. In formulas (a1) and (a2), R A is each independently a hydrogen atom or a methyl group.
- R 1 and R 2 are each independently a tertiary alkyl group having 4 to 6 carbon atoms.
- each R 3 is independently a fluorine atom or a methyl group, m is an integer of 0 to 4, X 1 is a single bond, a phenylene group or a naphthylene group, an ester bond, a lactone ring, or a phenylene group; and a naphthylene group and a linking group having 1 to 12 carbon atoms, and X 2 is a single bond, an ester bond or an amide bond.
- resist materials include the following. (i) A resist material containing a polymer having a repeating unit represented by the following formula (a1) or (a2).
- R A is a hydrogen atom or a methyl group.
- X 1 is a single bond or an ester group.
- X 2 is a linear, branched or cyclic carbon number an alkylene group having 1 to 12 carbon atoms or an arylene group having 6 to 10 carbon atoms, and part of the methylene groups constituting the alkylene group may be substituted with an ether group, an ester group or a lactone ring-containing group; , X 2 has at least one hydrogen atom substituted with a bromine atom, and X 3 is a single bond, an ether group, an ester group, or a linear, branched or cyclic alkylene having 1 to 12 carbon atoms.
- a part of the methylene groups constituting the alkylene group may be substituted with an ether group or an ester group, and each of Rf 1 to Rf 4 is independently a hydrogen atom, a fluorine atom or a trifluoromethyl group, at least one of which is a fluorine atom or a trifluoromethyl group, and Rf 1 and Rf 2 may combine to form a carbonyl group, and R 1 to R 5 are each independently directly Chain, branched or cyclic alkyl groups having 1 to 12 carbon atoms, linear, branched or cyclic alkenyl groups having 2 to 12 carbon atoms, alkynyl groups having 2 to 12 carbon atoms, and 6 to 20 carbon atoms.
- R 1 and R 2 may combine to form a ring together with the sulfur atom to which they are bonded.
- R A is a hydrogen atom or a methyl group.
- R 1 is a hydrogen atom or an acid-labile group.
- R 2 is a linear, branched or cyclic C 1 to 6 alkyl groups or halogen atoms other than bromine
- X 1 is a single bond or a phenylene group, or a linear, branched or cyclic C 1-12 group which may contain an ester group or a lactone ring is an alkylene group of X 2 is -O-, -O-CH 2 - or -NH-, m is an integer of 1 to 4, and n is an integer of 0 to 3.
- a coating solution comprising an organic solvent and a first organometallic compound represented by the formula RSnO (3/2 ⁇ x/2) (OH) x where 0 ⁇ x ⁇ 3, , about 0.0025 M to about 1.5 M of tin in the solution, R is an alkyl or cycloalkyl group having 3 to 31 carbon atoms, and the alkyl or cycloalkyl group is a second Coating solutions bonded to tin at primary or tertiary carbon atoms.
- an aqueous inorganic patterning precursor comprising a mixture of water, a metal suboxide cation, a polyatomic inorganic anion and a radiation sensitive ligand comprising a peroxide group; etc.
- Exposure is performed through a mask (reticle) for forming a predetermined pattern, and for example, i-ray, KrF excimer laser, ArF excimer laser, EUV (extreme ultraviolet) or EB (electron beam) is used.
- the resist underlayer film-forming composition of the invention is preferably applied for EUV (extreme ultraviolet) exposure.
- An alkaline developer is used for development, and the development temperature is selected from 5° C. to 50° C. and the development time is appropriately selected from 10 seconds to 300 seconds.
- alkaline developing solutions include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, aqueous ammonia, primary amines such as ethylamine and n-propylamine, diethylamine, secondary amines such as di-n-butylamine; tertiary amines such as triethylamine and methyldiethylamine; alcohol amines such as dimethylethanolamine and triethanolamine; Aqueous solutions of alkalis such as quaternary ammonium salts, pyrrole, cyclic amines such as piperidine, and the like can be used.
- inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, aqueous ammonia, primary amines such as ethylamine and n-propylamine, diethylamine, secondary amines such as di-n-butyl
- an alcohol such as isopropyl alcohol or a nonionic surfactant may be added in an appropriate amount to the aqueous alkali solution.
- Preferred developers among these are quaternary ammonium salts, more preferably tetramethylammonium hydroxide and choline.
- a surfactant or the like can be added to these developers. It is also possible to use a method of developing with an organic solvent such as butyl acetate instead of the alkaline developer, and developing the portion where the rate of alkali dissolution of the photoresist is not improved.
- the resist underlayer film is dry-etched.
- the inorganic film is formed on the surface of the semiconductor substrate used, the surface of the inorganic film is exposed, and when the inorganic film is not formed on the surface of the semiconductor substrate used, the semiconductor substrate is exposed. expose the surface.
- the substrate is processed by a method known per se (dry etching method, etc.), and a semiconductor device can be manufactured.
- the weight average molecular weights of the polymers shown in Synthesis Examples 1 to 3 and Comparative Synthesis Examples 1 to 3 in this specification are the results of measurement by gel permeation chromatography (hereinafter abbreviated as GPC).
- GPC gel permeation chromatography
- the polymer obtained in this synthesis example has structural units represented by the following formulas (XX), (XY), and (XZ).
- the polymer obtained in this synthesis example has structural units represented by the following formulas (XX), (XY), and (Xa).
- the polymer solution does not become cloudy even when cooled to room temperature, and has good solubility in propylene glycol monomethyl ether.
- GPC analysis revealed that the polymer in the resulting solution had a weight average molecular weight of 7,900 in terms of standard polystyrene.
- the polymer obtained in this synthesis example has structural units represented by the following formulas (XX) and (XY).
- the polymer obtained in this synthesis example has structural units represented by the following formulas (XX), (Xb), and (Xc).
- the polymer obtained in this synthesis example has structural units represented by the following formulas (XX), (Xd), and (Xa).
- Example 1-3 Comparative Example 1-2>
- Each polymer, cross-linking agent, curing catalyst, and solvent of Synthesis Examples 1-3 and Comparative Synthesis Examples 1-2 are mixed in the proportions shown in Tables 1 and 2, and filtered through a 0.1 ⁇ m fluororesin filter.
- Each solution of the composition for forming a resist underlayer film was prepared by the method.
- tetramethoxymethyl glycoluril (manufactured by Nippon Cytec Industries Co., Ltd.) is PL-LI, Imidazo[4,5-d]imidazole-2,5(1H,3H)-dione, tetrahydro-1 , 3,4,6-tetrakis [(2-methoxy-1-methylethoxy)methyl]- is PGME-PL, pyridinium-p-hydroxybenzenesulfonic acid is PyPSA, propylene glycol monomethyl ether acetate is PGMEA, propylene glycol monomethyl ether is Abbreviated as PGME. Each addition amount is shown in parts by mass.
- the composition for forming a resist underlayer film according to the present invention is a composition for forming a resist underlayer film capable of forming a desired resist pattern, a method for producing a substrate with a resist pattern using the composition for forming a resist underlayer film, a semiconductor A method of manufacturing a device can be provided.
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Abstract
Description
下記式(I):
(式(I)中、A1、A2、A3、A4、A5及びA6は、それぞれ独立に水素原子、メチル基又はエチル基を表し、Q1は2価の有機基を表し、R1は炭素原子数6~40の芳香環構造を含む4価の有機基を表し、L1及びL2は各々独立して水素原子、又はヒドロキシ基で置換されていてもよく、酸素原子で中断されていてもよい炭素原子数1~10のアルキル基を表す。)
で表される単位構造を有するポリマー、及び溶剤を含む、レジスト下層膜形成組成物。
前記R1が、ビフェニレン構造を含む、[1]に記載のレジスト下層膜形成組成物。
前記ポリマーが、下記式(a-2):
(式(a-2)中、Y1は単結合、酸素原子、硫黄原子、ハロゲン原子若しくは炭素原子数6~40のアリール基で置換されてもよい炭素原子数1~10のアルキレン基又はスルホニル基を表し、n1個のT1及びn2個のT2は各々独立に水素原子又は炭素原子数1~10のアルキル基を表し、相互に結合して二つのベンゼン環を橋架けしていてもよく、
n1及びn2は各々独立して0~4の整数を表し、Q1、A1、A2、A3、A4、A5、A6、L1及びL2は[1]に定義したとおりである。)
で表される繰り返し単位を含む、[1]又は[2]に記載のレジスト下層膜形成組成物。
前記ポリマーが、複素環構造をさらに有する、[1]~[3]何れか1項に記載のレジスト下層膜形成組成物。
前記Y1が、スルホニル基である、[1]~[4]何れか1項に記載のレジスト下層膜形成組成物。
前記ポリマーの末端が化合物で封止されている、[1]~[5]何れか1項に記載のレジスト下層膜形成組成物。
前記化合物が、置換基で置換されていてもよい脂肪族環を含む、[6]に記載のレジスト下層膜形成組成物。
前記化合物が、下記式(1)及び式(2):
(式(1)、(2)中、R1は置換基を有してもよい炭素原子数1~6のアルキル基、フェニル基、ピリジル基、ハロゲノ基又はヒドロキシ基を表し、R2は水素原子、炭素原子数1~6のアルキル基、ヒドロキシ基、ハロゲノ基又は-C(=O)O-Xで表されるエステル基を表し、Xは置換基を有してもよい炭素原子数1~6のアルキル基を表し、R3は水素原子、炭素原子数1~6のアルキル基、ヒドロキシ基又はハロゲノ基を表し、R4は直接結合、又は炭素原子数1~8の二価の有機基を表し、R5は炭素原子数1~8の二価の有機基を表し、Aは芳香族環又は芳香族複素環を表し、tは0又は1を表し、uは1又は2を表す。)
で表される、[6]に記載のレジスト下層膜形成組成物。
硬化触媒をさらに含む、[1]~[8]の何れか1項に記載のレジスト下層膜形成組成物。
架橋剤をさらに含む、[1]~[9]の何れか1項に記載のレジスト下層膜形成組成物。
[1]~[10]の何れか1項に記載のレジスト下層膜形成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[1]~[10]の何れか1項に記載のレジスト下層膜形成組成物を塗布しベークしてレジスト下層膜を形成する工程、
前記レジスト下層膜上にレジストを塗布しベークしてレジスト膜を形成する工程、
前記レジスト下層膜と前記レジストで被覆された半導体基板を露光する工程、
露光後の前記レジスト膜を現像し、パターニングする工程
を含む、パターニングされた基板の製造方法。
半導体基板上に、[1]~[10]の何れか1項に記載のレジスト下層膜形成組成物からなるレジスト下層膜を形成する工程と、
前記レジスト下層膜の上にレジスト膜を形成する工程と、
レジスト膜に対する光又は電子線の照射とその後の現像によりレジストパターンを形成する工程と、
形成された前記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することによりパターン化されたレジスト下層膜を形成する工程と、
パターン化された前記レジスト下層膜により半導体基板を加工する工程と、
を含むことを特徴とする、半導体装置の製造方法。
本発明のレジスト下層膜形成組成物は、ポリマー、及び溶剤を含み、前記ポリマーが、下記式(I):
(式(I)中、A1、A2、A3、A4、A5及びA6は、それぞれ独立に水素原子、メチル基又はエチル基を表し、Q1は2価の有機基を表し、R1は炭素原子数6~40の芳香環構造を含む4価の有機基を表し、L1及びL2は各々独立して水素原子、又はヒドロキシ基で置換されていてもよく、酸素原子で中断されていてもよい炭素原子数1~10のアルキル基を表す。)
で表される単位構造を有するポリマーである。
(式(III)中、Y1は単結合、酸素原子、硫黄原子、ハロゲン原子若しくは炭素原子数6~40のアリール基で置換されてもよい炭素原子数1~10のアルキレン基又はスルホニル基を表し、n1個のT1及びn2個のT2は各々独立に水素原子又は炭素原子数1~10のアルキル基を表し、相互に結合して二つのベンゼン環を橋架けしていてもよく、n1及びn2は各々独立して0~4の整数を表し、
*はR1が結合しているカルボニル基の炭素原子への結合部分である。)
で表されてよい。
(式(2-1)中、Y1は単結合、酸素原子、硫黄原子、ハロゲン原子若しくは炭素原子数6~40のアリール基で置換されてもよい炭素原子数1~10のアルキレン基又はスルホニル基を表し、n1個のT1及びn2個のT2は各々独立に水素原子又は炭素原子数1~10のアルキル基を表し、相互に結合して二つのベンゼン環を橋架けしていてもよく、n1及びn2は各々独立して0~4の整数を表す。)
で表される化合物から誘導されてよい。
(式(a-1)中、Y1、T1、T2、n1及びn2は上に定義した通りであり、L1及びL2は各々独立して水素原子、又はヒドロキシ基で置換されていてもよく、酸素原子で中断されていてもよい炭素原子数1~10のアルキル基を表し、*は、ポリマー残基との結合部分を表す。)で表される部分構造を含んでよい。
(式(a-2)中、Y1、T1、T2、n1及びn2は上に定義した通りであり、L1及びL2は上に定義した通りであり、A1、A2、A3、A4、A5及びA6は、それぞれ独立に水素原子、メチル基又はエチル基を表し、Q1は2価の有機基を表す。)で表される繰り返し単位を含んでよい。
(式(1)、(2)中、R1は置換基を有してもよい炭素原子数1~6のアルキル基、フェニル基、ピリジル基、ハロゲノ基又はヒドロキシ基を表し、R2は水素原子、炭素原子数1~6のアルキル基、ヒドロキシ基、ハロゲノ基又は-C(=O)O-Xで表されるエステル基を表し、Xは置換基を有してもよい炭素原子数1~6のアルキル基を表し、R3は水素原子、炭素原子数1~6のアルキル基、ヒドロキシ基又はハロゲノ基を表し、R4は直接結合、又は炭素原子数1~8の二価の有機基を表し、R5は炭素原子数1~8の二価の有機基を表し、Aは芳香族環又は芳香族複素環を表し、tは0又は1を表し、uは1又は2を表す。)
で表されてよい。
本発明のレジスト下層膜形成組成物に任意成分として含まれる硬化触媒としては、酸発生剤であることが好ましい。前記酸発生剤としては、例えば、p-トルエンスルホン酸、トリフルオロメタンスルホン酸、ピリジニウム-p-トルエンスルホネート(ピリジニウム-p-トルエンスルホン酸)、ピリジニウム-p-ヒドロキシベンゼンスルホン酸(p-フェノールスルホン酸ピリジニウム塩)、ピリジニウム-トリフルオロメタンスルホン酸、サリチル酸、カンファースルホン酸、5-スルホサリチル酸、4-クロロベンゼンスルホン酸、4-ヒドロキシベンゼンスルホン酸、ベンゼンジスルホン酸、1-ナフタレンスルホン酸、クエン酸、安息香酸、ヒドロキシ安息香酸等のスルホン酸化合物及びカルボン酸化合物が挙げられる。上記架橋触媒が使用される場合、当該架橋触媒の含有割合は、下記架橋剤に対し、例えば0.1質量%~50質量%であり、好ましくは、1質量%~30質量%である。
本発明のレジスト下層膜形成組成物に任意成分として含まれる架橋剤としては、例えば、ヘキサメトキシメチルメラミン、テトラメトキシメチルベンゾグアナミン、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル(テトラメトキシメチルグリコールウリル)(POWDERLINK〔登録商標〕1174)、1,3,4,6-テトラキス(ブトキシメチル)グリコールウリル、1,3,4,6-テトラキス(ヒドロキシメチル)グリコールウリル、1,3-ビス(ヒドロキシメチル)尿素、1,1,3,3-テトラキス(ブトキシメチル)尿素及び1,1,3,3-テトラキス(メトキシメチル)尿素が挙げられる。
(式(1E)中、4つのR1はそれぞれ独立にメチル基又はエチル基を表し、R2及びR3はそれぞれ独立に水素原子、炭素原子数1~4のアルキル基、又はフェニル基を表す。)
前記式(1E)で表されるグリコールウリル誘導体として、例えば、下記式(1E-1)~式(1E-6)で表される化合物が挙げられる。
(式(2d)、(3d)中、R1はメチル基又はエチル基を表し、R4は炭素原子数1~4のアルキル基を表す。)
前記式(1E)で表されるグリコールウリル誘導体は、下記式(2E)で表されるグリコールウリル誘導体と前記式(3d)で表される少なくとも1種の化合物とを反応させることにより得られる。
(式(2E)中、R2及びR3はそれぞれ独立に水素原子、炭素原子数1~4のアルキル基、又はフェニル基を表し、R4はそれぞれ独立に炭素原子数1~4のアルキル基を表す。)
前記式(2E)で表されるグリコールウリル誘導体として、例えば、下記式(2E-1)~式(2E-4)で表される化合物が挙げられる。さらに前記式(3d)で表される化合物として、例えば下記式(3d-1)及び式(3d-2)で表される化合物が挙げられる。
(式中、Q1は単結合又はm1価の有機基を示し、R1及びR4はそれぞれ炭素原子数2乃至10のアルキル基、又は炭素原子数1乃至10のアルコキシ基を有する炭素原子数2乃至10のアルキル基を示し、R2及びR5はそれぞれ水素原子又はメチル基を示し、R3及びR6はそれぞれ炭素原子数1乃至10のアルキル基、又は炭素原子数6乃至40のアリール基を示す。
n1は1≦n1≦3の整数、n2は2≦n2≦5の整数、n3は0≦n3≦3の整数、n4は0≦n4≦3の整数、3≦(n1+n2+n3+n4)≦6の整数を示す。
n5は1≦n5≦3の整数、n6は1≦n6≦4の整数、n7は0≦n7≦3の整数、n8は0≦n8≦3の整数、2≦(n5+n6+n7+n8)≦5の整数を示す。
m1は2乃至10の整数を示す。)
(式中、Q2は単結合又はm2価の有機基を示す。R8、R9、R11及びR12はそれぞれ水素原子又はメチル基を示し、R7及びR10はそれぞれ炭素原子数1乃至10のアルキル基、又は炭素原子数6乃至40のアリール基を示す。
n9は1≦n9≦3の整数、n10は2≦n10≦5の整数、n11は0≦n11≦3の整数、n12は0≦n12≦3の整数、3≦(n9+n10+n11+n12)≦6の整数を示す。
n13は1≦n13≦3の整数、n14は1≦n14≦4の整数、n15は0≦n15≦3の整数、n16は0≦n16≦3の整数、2≦(n13+n14+n15+n16)≦5の整数を示す。
m2は2乃至10の整数を示す。)
本発明のレジスト下層膜形成組成物には、ピンホールやストリエーション等の発生がなく、表面むらに対する塗布性をさらに向上させるために、さらに界面活性剤を添加することができる。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ノールエーテル、ポリオキシエチレンノニルフェノールエーテル等のポリオキシエチレンアルキルアリルエーテル類、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EF301、EF303、EF352((株)トーケムプロダクツ製、商品名)、メガファックF171、F173、R-30(大日本インキ(株)製、商品名)、フロラードFC430、FC431(住友スリーエム(株)製、商品名)、アサヒガードAG710、サーフロンS-382、SC101、SC102、SC103、SC104、SC105、SC106(旭硝子(株)製、商品名)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)等を挙げることができる。これらの界面活性剤の配合量は、本発明のレジスト下層膜形成組成物の全固形分に対して通常2.0質量%以下、好ましくは1.0質量%以下である。これらの界面活性剤は単独で添加してもよいし、また2種以上の組合せで添加することもできる。
本発明に係るレジスト下層膜は、上述したレジスト下層膜形成組成物を半導体基板上に塗布し、焼成することにより製造することができる。
パターンニングされた基板の製造方法は以下の工程を経る。通常、レジスト下層膜の上にフォトレジスト層を形成して製造される。レジスト下層膜の上に自体公知の方法で塗布、焼成して形成されるフォトレジストとしては露光に使用される光に感光するものであれば特に限定はない。ネガ型フォトレジスト及びポジ型フォトレジストのいずれも使用できる。ノボラック樹脂と1,2-ナフトキノンジアジドスルホン酸エステルとからなるポジ型フォトレジスト、酸により分解してアルカリ溶解速度を上昇させる基を有するバインダーと光酸発生剤からなる化学増幅型フォトレジスト、酸により分解してフォトレジストのアルカリ溶解速度を上昇させる低分子化合物とアルカリ可溶性バインダーと光酸発生剤とからなる化学増幅型フォトレジスト、及び酸により分解してアルカリ溶解速度を上昇させる基を有するバインダーと酸により分解してフォトレジストのアルカリ溶解速度を上昇させる低分子化合物と光酸発生剤からなる化学増幅型フォトレジスト、メタル元素を含有するレジストなどがある。例えば、JSR(株)製商品名V146G、シプレー社製商品名APEX-E、住友化学工業(株)製商品名PAR710、及び信越化学工業(株)製商品名AR2772、SEPR430等が挙げられる。また、例えば、Proc.SPIE,Vol.3999,330-334(2000)、Proc.SPIE,Vol.3999,357-364(2000)、やProc.SPIE,Vol.3999,365-374(2000)に記載されているような、含フッ素原子ポリマー系フォトレジストを挙げることができる。またいわゆる金属を含有する金属含有レジスト(メタルレジスト)であってよい。
(i) 酸の作用により脱離する保護基で極性基が保護された酸分解性基を有する繰り返し単位を有する樹脂A、及び、一般式(11)で表される化合物を含む、感活性光線性又は感放射線性樹脂組成物。
一般式(11)中、mは、1~6の整数を表す。
R1及びR2は、それぞれ独立に、フッ素原子又はパーフルオロアルキル基を表す。
L1は、-O-、-S-、-COO-、-SO2-、又は、-SO3-を表す。
L2は、置換基を有していてもよいアルキレン基又は単結合を表す。
W1は、置換基を有していてもよい環状有機基を表す。
M+は、カチオンを表す。
[式(II)中、
R2は、ハロゲン原子を有してもよい炭素数1~6のアルキル基、水素原子又はハロゲン原子を表し、X1は、単結合、-CO-O-*又は-CO-NR4-*を表し、*は-Arとの結合手を表し、R4は、水素原子又は炭素数1~4のアルキル基を表し、Arは、ヒドロキシ基及びカルボキシル基からなる群から選ばれる1以上の基を有していてもよい炭素数6~20の芳香族炭化水素基を表す。]
酸の作用により現像液に対する溶解性が変化する基材成分(A)及びアルカリ現像液に対して分解性を示すフッ素添加剤成分(F)を含有し、
前記フッ素添加剤成分(F)は、塩基解離性基を含む構成単位(f1)と、下記一般式(f2-r-1)で表される基を含む構成単位(f2)と、を有するフッ素樹脂成分(F1)を含有することを特徴とする、レジスト組成物。
[式(f2-r-1)中、Rf21は、それぞれ独立に、水素原子、アルキル基、アルコキシ基、水酸基、ヒドロキシアルキル基又はシアノ基である。n”は、0~2の整数である。*は結合手である。]
[式(f1-1)、(f1-2)中、Rは、それぞれ独立に、水素原子、炭素数1~5のアルキル基又は炭素数1~5のハロゲン化アルキル基である。Xは、酸解離性部位を有さない2価の連結基である。Aarylは、置換基を有していてもよい2価の芳香族環式基である。X01は、単結合又は2価の連結基である。R2は、それぞれ独立に、フッ素原子を有する有機基である。]
レジスト膜としては、例えば、以下が挙げられる。
(i)下記式(a1)で表される繰り返し単位及び/又は下記式(a2)で表される繰り返し単位と、露光によりポリマー主鎖に結合した酸を発生する繰り返し単位とを含むベース樹脂を含むレジスト膜。
(式(a1)、(a2)中、RAは、それぞれ独立に、水素原子又はメチル基である。R1及びR2は、それぞれ独立に、炭素数4~6の3級アルキル基である。R3は、それぞれ独立に、フッ素原子又はメチル基である。mは、0~4の整数である。X1は、単結合、フェニレン基若しくはナフチレン基、又はエステル結合、ラクトン環、フェニレン基及びナフチレン基から選ばれる少なくとも1種を含む炭素数1~12の連結基である。X2は、単結合、エステル結合又はアミド結合である。)
(i) 下記式(a1)又は(a2)で表される繰り返し単位を有するポリマーを含むレジスト材料。
(式(a1)、(a2)中、RAは、水素原子又はメチル基である。X1は、単結合又はエステル基である。X2は、直鎖状、分岐状若しくは環状の炭素数1~12のアルキレン基又は炭素数6~10のアリーレン基であり、該アルキレン基を構成するメチレン基の一部が、エーテル基、エステル基又はラクトン環含有基で置換されていてもよく、また、X2に含まれる少なくとも1つの水素原子が臭素原子で置換されている。X3は、単結合、エーテル基、エステル基、又は炭素数1~12の直鎖状、分岐状若しくは環状のアルキレン基であり、該アルキレン基を構成するメチレン基の一部が、エーテル基又はエステル基で置換されていてもよい。Rf1~Rf4は、それぞれ独立に、水素原子、フッ素原子又はトリフルオロメチル基であるが、少なくとも1つはフッ素原子又はトリフルオロメチル基である。また、Rf1及びRf2が合わさってカルボニル基を形成してもよい。R1~R5は、それぞれ独立に、直鎖状、分岐状若しくは環状の炭素数1~12のアルキル基、直鎖状、分岐状若しくは環状の炭素数2~12のアルケニル基、炭素数2~12のアルキニル基、炭素数6~20のアリール基、炭素数7~12のアラルキル基、又は炭素数7~12のアリールオキシアルキル基であり、これらの基の水素原子の一部又は全部が、ヒドロキシ基、カルボキシ基、ハロゲン原子、オキソ基、シアノ基、アミド基、ニトロ基、スルトン基、スルホン基又はスルホニウム塩含有基で置換されていてもよく、これらの基を構成するメチレン基の一部が、エーテル基、エステル基、カルボニル基、カーボネート基又はスルホン酸エステル基で置換されていてもよい。また、R1とR2とが結合して、これらが結合する硫黄原子と共に環を形成してもよい。)
(式(a)中、RAは、水素原子又はメチル基である。R1は、水素原子又は酸不安定基である。R2は、直鎖状、分岐状若しくは環状の炭素数1~6のアルキル基、又は臭素以外のハロゲン原子である。X1は、単結合若しくはフェニレン基、又はエステル基若しくはラクトン環を含んでいてもよい直鎖状、分岐状若しくは環状の炭素数1~12のアルキレン基である。X2は、-O-、-O-CH2-又は-NH-である。mは、1~4の整数である。nは、0~3の整数である。)
(i) コーティング溶液であって、有機溶媒;第一の有機金属組成物であって、式RzSnO(2-(z/2)-(x/2))(OH)x(ここで、0<z≦2および0<(z+x)≦4である)、式R’nSnX4-n(ここで、n=1または2である)、またはそれらの混合物によって表され、ここで、RおよびR’が、独立して、1~31個の炭素原子を有するヒドロカルビル基であり、およびXが、Snに対する加水分解性結合を有する配位子またはそれらの組合せである、第一の有機金属組成物;および加水分解性の金属化合物であって、式MX’v(ここで、Mが、元素周期表の第2~16族から選択される金属であり、v=2~6の数であり、およびX’が、加水分解性のM-X結合を有する配位子またはそれらの組合せである)によって表される、加水分解性の金属化合物 を含む、コーティング溶液。
(ii) 有機溶媒と、式RSnO(3/2-x/2)(OH)x(式中、0<x<3)で表される第1の有機金属化合物とを含むコーティング溶液であって、前記溶液中に約0.0025M~約1.5Mのスズが含まれ、Rが3~31個の炭素原子を有するアルキル基またはシクロアルキル基であり、前記アルキル基またはシクロアルキル基が第2級または第3級炭素原子においてスズに結合された、コーティング溶液。
(iii) 水と、金属亜酸化物陽イオンと、多原子無機陰イオンと、過酸化物基を含んで成る感放射線リガンドとの混合物を含んで成る無機パターン形成前駆体水溶液。等が挙げられる。
カラム温度:40℃
溶媒:N,N-ジメチルホルムアミド(DMF)
流量:0.6ml/分
標準試料:ポリスチレン(東ソー(株)製)
モノアリルジグリシジルイソシアヌル酸(四国化成工業(株)製)3.00g、3、3’、4、4’-ジフェニルスルホンテトラカルボン酸二無水物(東京化成工業(株)製)3.27g、4-(メチルスルホニル)安息香酸(東京化成工業(株)製)0.64g、テトラブチルホスホニウムブロマイド(北興化学工業(株)製)0.27gを、プロピレングリコールモノメチルエーテル21.83gに加え溶解させた。反応容器を窒素置換後、105℃で24時間反応させ、ポリマー溶液を得た。当該ポリマー溶液は、室温に冷却しても白濁等を生じることはなく、プロピレングリコールモノメチルエ―テルに対する溶解性は良好である。GPC分析を行ったところ、得られた溶液中のポリマーは標準ポリスチレン換算にて重量平均分子量8, 300であった。本合成例で得られたポリマーは、下記式(XX)、(XY)、(XZ)で表される構造単位を有する。
モノアリルジグリシジルイソシアヌル酸(四国化成工業(株)製)3.00g、3、3’、4、4’-ジフェニルスルホンテトラカルボン酸二無水物(東京化成工業(株)製)3.27g、5-ノルボルネン-2,3-ジカルボン酸無水物(東京化成工業(株)製)0.53g、テトラブチルホスホニウムブロマイド(北興化学工業(株)製)0.27gを、プロピレングリコールモノメチルエーテル21.49gに加え溶解させた。反応容器を窒素置換後、105℃で24時間反応させ、ポリマー溶液を得た。当該ポリマー溶液は、室温に冷却しても白濁等を生じることはなく、プロピレングリコールモノメチルエ―テルに対する溶解性は良好である。GPC分析を行ったところ、得られた溶液中のポリマーは標準ポリスチレン換算にて重量平均分子量12,300であった。本合成例で得られたポリマーは、下記式(XX)、(XY)、(Xa)で表される構造単位を有する。
モノアリルジグリシジルイソシアヌル酸(四国化成工業(株)製)3.00g、3、3’、4、4’-ジフェニルスルホンテトラカルボン酸二無水物(東京化成工業(株)製)3.27g、テトラブチルホスホニウムブロマイド(北興化学工業(株)製)0.27gを、プロピレングリコールモノメチルエーテル19.90gに加え溶解させた。反応容器を窒素置換後、105℃で24時間反応させ、ポリマー溶液を得た。当該ポリマー溶液は、室温に冷却しても白濁等を生じることはなく、プロピレングリコールモノメチルエ―テルに対する溶解性は良好である。GPC分析を行ったところ、得られた溶液中のポリマーは標準ポリスチレン換算にて重量平均分子量7,900であった。本合成例で得られたポリマーは、下記式(XX)、(XY)で表される構造単位を有する。
モノアリルジグリシジルイソシアヌル酸(四国化成工業(株)製)3.00g、3,3’-ジチオジプロピオン酸(堺化学工業(株)製、商品名:DTDPA)1.91g、アダマンタンカルボン酸(東京化成工業(株)製)0.57g、テトラブチルホスホニウムブロマイド(北興化学工業(株)製)0.14gを、プロピレングリコールモノメチルエーテル6.87gに加え溶解させた。反応容器を窒素置換後、105℃で8時間反応させ、ポリマー溶液を得た。当該ポリマー溶液は、室温に冷却しても白濁等を生じることはなく、プロピレングリコールモノメチルエ―テルに対する溶解性は良好である。GPC分析を行ったところ、得られた溶液中のポリマーは標準ポリスチレン換算にて重量平均分子量5,000であった。本合成例で得られたポリマーは、下記式(XX)、(Xb)、(Xc)で表される構造単位を有する。
モノアリルジグリシジルイソシアヌル酸(四国化成工業(株)製)2.50g、ジエチルバルビツール酸(東京化成工業(株)製)1.47g、5-ノルボルネン-2,3-ジカルボン酸無水物(東京化成工業(株)製)0.29g、エチルトリフェニルホスホニウムブロマイド(東京化成工業(株)製)0.16gを、プロピレングリコールモノメチルエーテル8.97gに加え溶解させた。反応容器を窒素置換後、110℃で24時間反応させ、ポリマー溶液を得た。当該ポリマー溶液は、室温に冷却しても白濁等を生じることはなく、プロピレングリコールモノメチルエ―テルに対する溶解性は良好である。GPC分析を行ったところ、得られた溶液中のポリマーは標準ポリスチレン換算にて重量平均分子量3,000であった。本合成例で得られたポリマーは、下記式(XX)、(Xd)、(Xa)で表される構造単位を有する。
上記合成例1~3、比較合成例1~2の各ポリマー、架橋剤、硬化触媒、溶媒を表1、表2に示す割合で混合し、0.1μmのフッ素樹脂製のフィルターで濾過することによって、レジスト下層膜形成用組成物の溶液をそれぞれ調製した。
実施例1、実施例2、実施例3及び比較例1、比較例2のレジスト下層膜形成組成物を、それぞれ、スピナーにより、半導体基板であるシリコンウェハー上に塗布した。そのシリコンウェハーをホットプレート上に配置し、205℃で1分間ベークし、レジスト下層膜(膜厚4nm)を形成した。これらのレジスト下層膜をフォトレジストに使用する溶剤である乳酸エチル及びプロピレングリコールモノメチルエーテルに浸漬し、それらの溶剤に不溶であることを確認した。
実施例1、実施例2、実施例3及び比較例1、比較例2のレジスト下層膜形成組成物を、スピナーを用いてシリコンウェハー上にそれぞれ塗布した。そのシリコンウェハーを、ホットプレート上で205℃、60秒間ベークし、膜厚4nmのレジスト下層膜を得た。そのレジスト下層膜上に、EUV用ポジ型レジスト溶液(メタクリルポリマー含有)をスピンコートし、130℃で60秒間加熱し、EUVレジスト膜を形成した。そのレジスト膜に対し、EUV露光描画装置(NXE―3400)を用い、所定の条件で露光した。露光後、100℃で60秒間ベーク(PEB)を行い、クーリングプレート上で室温まで冷却し、アルカリ現像液(2.38%TMAH)で現像した後、19nmラインパターン/32nmピッチのレジストパターンを形成した。レジストパターンの測長には走査型電子顕微鏡((株)日立ハイテクノロジーズ製、CG4100)を用いた。上記レジストパターンの形成において、CDサイズ19nmのラインパターンを形成した場合は「良好」、ラインパターンのブリッジが見られた場合には「不良」とした。結果を表3に示す。
Claims (13)
- 前記R1が、ビフェニレン構造を含む、請求項1に記載のレジスト下層膜形成組成物。
- 前記ポリマーが、複素環構造をさらに有する、請求項1~3何れか1項に記載のレジスト下層膜形成組成物。
- 前記Y1が、スルホニル基である、請求項1~4何れか1項に記載のレジスト下層膜形成組成物。
- 前記ポリマーの末端が化合物で封止されている、請求項1~5何れか1項に記載のレジスト下層膜形成組成物。
- 前記化合物が、置換基で置換されていてもよい脂肪族環を含む、請求項6に記載のレジスト下層膜形成組成物。
- 前記化合物が、下記式(1)及び式(2):
(式(1)、(2)中、R1は置換基を有してもよい炭素原子数1~6のアルキル基、フェニル基、ピリジル基、ハロゲノ基又はヒドロキシ基を表し、R2は水素原子、炭素原子数1~6のアルキル基、ヒドロキシ基、ハロゲノ基又は-C(=O)O-Xで表されるエステル基を表し、Xは置換基を有してもよい炭素原子数1~6のアルキル基を表し、R3は水素原子、炭素原子数1~6のアルキル基、ヒドロキシ基又はハロゲノ基を表し、R4は直接結合、又は炭素原子数1~8の二価の有機基を表し、R5は炭素原子数1~8の二価の有機基を表し、Aは芳香族環又は芳香族複素環を表し、tは0又は1を表し、uは1又は2を表す。)
で表される、請求項6に記載のレジスト下層膜形成組成物。 - 硬化触媒をさらに含む、請求項1~8の何れか1項に記載のレジスト下層膜形成組成物。
- 架橋剤をさらに含む、請求項1~9の何れか1項に記載のレジスト下層膜形成組成物。
- 請求項1~10の何れか1項に記載のレジスト下層膜形成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1~10の何れか1項に記載のレジスト下層膜形成組成物を塗布しベークしてレジスト下層膜を形成する工程、
前記レジスト下層膜上にレジストを塗布しベークしてレジスト膜を形成する工程、
前記レジスト下層膜と前記レジストで被覆された半導体基板を露光する工程、
露光後の前記レジスト膜を現像し、パターニングする工程
を含む、パターニングされた基板の製造方法。 - 半導体基板上に、請求項1~10の何れか1項に記載のレジスト下層膜形成組成物からなるレジスト下層膜を形成する工程と、
前記レジスト下層膜の上にレジスト膜を形成する工程と、
レジスト膜に対する光又は電子線の照射とその後の現像によりレジストパターンを形成する工程と、
形成された前記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することによりパターン化されたレジスト下層膜を形成する工程と、
パターン化された前記レジスト下層膜により半導体基板を加工する工程と、
を含むことを特徴とする、半導体装置の製造方法。
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CN118276405A (zh) | 2024-07-02 |
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