WO2013073582A1 - 環状化合物、その製造方法、感放射線性組成物及びレジストパターン形成方法 - Google Patents
環状化合物、その製造方法、感放射線性組成物及びレジストパターン形成方法 Download PDFInfo
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- WO2013073582A1 WO2013073582A1 PCT/JP2012/079528 JP2012079528W WO2013073582A1 WO 2013073582 A1 WO2013073582 A1 WO 2013073582A1 JP 2012079528 W JP2012079528 W JP 2012079528W WO 2013073582 A1 WO2013073582 A1 WO 2013073582A1
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- substituted
- unsubstituted
- carbon atoms
- aliphatic hydrocarbon
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- YWFWDNVOPHGWMX-UHFFFAOYSA-N n,n-dimethyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(C)C YWFWDNVOPHGWMX-UHFFFAOYSA-N 0.000 description 1
- OOHAUGDGCWURIT-UHFFFAOYSA-N n,n-dipentylpentan-1-amine Chemical compound CCCCCN(CCCCC)CCCCC OOHAUGDGCWURIT-UHFFFAOYSA-N 0.000 description 1
- WDQKICIMIPUDBL-UHFFFAOYSA-N n-[2-(dimethylamino)ethyl]prop-2-enamide Chemical compound CN(C)CCNC(=O)C=C WDQKICIMIPUDBL-UHFFFAOYSA-N 0.000 description 1
- MXLKZNKNVRJFLQ-UHFFFAOYSA-N n-[4-[(benzenesulfonyldiazenyl)methylsulfonyl]butylsulfonylmethylimino]benzenesulfonamide Chemical compound C=1C=CC=CC=1S(=O)(=O)N=NCS(=O)(=O)CCCCS(=O)(=O)CN=NS(=O)(=O)C1=CC=CC=C1 MXLKZNKNVRJFLQ-UHFFFAOYSA-N 0.000 description 1
- SAOJTUFUKMIENZ-UHFFFAOYSA-N n-[6-[(benzenesulfonyldiazenyl)methylsulfonyl]hexylsulfonylmethylimino]benzenesulfonamide Chemical compound C=1C=CC=CC=1S(=O)(=O)N=NCS(=O)(=O)CCCCCCS(=O)(=O)CN=NS(=O)(=O)C1=CC=CC=C1 SAOJTUFUKMIENZ-UHFFFAOYSA-N 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
- 229940017144 n-butyl lactate Drugs 0.000 description 1
- 125000006126 n-butyl sulfonyl group Chemical group 0.000 description 1
- GMTCPFCMAHMEMT-UHFFFAOYSA-N n-decyldecan-1-amine Chemical compound CCCCCCCCCCNCCCCCCCCCC GMTCPFCMAHMEMT-UHFFFAOYSA-N 0.000 description 1
- UWHRNIXHZAWBMF-UHFFFAOYSA-N n-dodecyl-n-methyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(C)CCCCCCCCCCCC UWHRNIXHZAWBMF-UHFFFAOYSA-N 0.000 description 1
- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- NJWMENBYMFZACG-UHFFFAOYSA-N n-heptylheptan-1-amine Chemical compound CCCCCCCNCCCCCCC NJWMENBYMFZACG-UHFFFAOYSA-N 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- PXSXRABJBXYMFT-UHFFFAOYSA-N n-hexylhexan-1-amine Chemical compound CCCCCCNCCCCCC PXSXRABJBXYMFT-UHFFFAOYSA-N 0.000 description 1
- OMEMQVZNTDHENJ-UHFFFAOYSA-N n-methyldodecan-1-amine Chemical compound CCCCCCCCCCCCNC OMEMQVZNTDHENJ-UHFFFAOYSA-N 0.000 description 1
- MFHKEJIIHDNPQE-UHFFFAOYSA-N n-nonylnonan-1-amine Chemical compound CCCCCCCCCNCCCCCCCCC MFHKEJIIHDNPQE-UHFFFAOYSA-N 0.000 description 1
- JACMPVXHEARCBO-UHFFFAOYSA-N n-pentylpentan-1-amine Chemical compound CCCCCNCCCCC JACMPVXHEARCBO-UHFFFAOYSA-N 0.000 description 1
- VBEGHXKAFSLLGE-UHFFFAOYSA-N n-phenylnitramide Chemical compound [O-][N+](=O)NC1=CC=CC=C1 VBEGHXKAFSLLGE-UHFFFAOYSA-N 0.000 description 1
- OOYZLFZSZZFLJW-UHFFFAOYSA-M naphthalen-1-yl(diphenyl)sulfanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC=CC=C1[S+](C=1C2=CC=CC=C2C=CC=1)C1=CC=CC=C1 OOYZLFZSZZFLJW-UHFFFAOYSA-M 0.000 description 1
- CXAYOCVHDCXPAI-UHFFFAOYSA-N naphthalen-1-yl(phenyl)methanone Chemical compound C=1C=CC2=CC=CC=C2C=1C(=O)C1=CC=CC=C1 CXAYOCVHDCXPAI-UHFFFAOYSA-N 0.000 description 1
- 150000002790 naphthalenes Chemical group 0.000 description 1
- 229960002715 nicotine Drugs 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 229960003512 nicotinic acid Drugs 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- FJDUDHYHRVPMJZ-UHFFFAOYSA-N nonan-1-amine Chemical compound CCCCCCCCCN FJDUDHYHRVPMJZ-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- BTFQKIATRPGRBS-UHFFFAOYSA-N o-tolualdehyde Chemical compound CC1=CC=CC=C1C=O BTFQKIATRPGRBS-UHFFFAOYSA-N 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- WOFPPJOZXUTRAU-UHFFFAOYSA-N octan-4-ol Chemical compound CCCCC(O)CCC WOFPPJOZXUTRAU-UHFFFAOYSA-N 0.000 description 1
- 125000002801 octanoyl group Chemical group C(CCCCCCC)(=O)* 0.000 description 1
- 125000002347 octyl 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])[H] 0.000 description 1
- 125000005069 octynyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C#C* 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- CDXVUROVRIFQMV-UHFFFAOYSA-N oxo(diphenoxy)phosphanium Chemical compound C=1C=CC=CC=1O[P+](=O)OC1=CC=CC=C1 CDXVUROVRIFQMV-UHFFFAOYSA-N 0.000 description 1
- RQKYHDHLEMEVDR-UHFFFAOYSA-N oxo-bis(phenylmethoxy)phosphanium Chemical compound C=1C=CC=CC=1CO[P+](=O)OCC1=CC=CC=C1 RQKYHDHLEMEVDR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000001312 palmitoyl group Chemical group O=C([*])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])C([H])([H])[H] 0.000 description 1
- 125000000913 palmityl 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])C([H])([H])[H] 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
- 230000035515 penetration Effects 0.000 description 1
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- RPXRNZKIARTPPW-UHFFFAOYSA-N pentyl 4-(2-hydroxypropan-2-yl)benzoate Chemical compound CCCCCOC(=O)C1=CC=C(C(C)(C)O)C=C1 RPXRNZKIARTPPW-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000001148 pentyloxycarbonyl group Chemical group 0.000 description 1
- 125000005981 pentynyl group Chemical group 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000001484 phenothiazinyl group Chemical class C1(=CC=CC=2SC3=CC=CC=C3NC12)* 0.000 description 1
- ICNNGWUEZQCEGJ-UHFFFAOYSA-N phenyl 3-(2-hydroxypropan-2-yl)benzoate Chemical compound CC(C)(O)C1=CC=CC(C(=O)OC=2C=CC=CC=2)=C1 ICNNGWUEZQCEGJ-UHFFFAOYSA-N 0.000 description 1
- JPNCJWQEOLYHTA-UHFFFAOYSA-N phenyl 4-hydroxy-2-propan-2-ylbenzoate Chemical compound OC1=CC(=C(C(=O)OC2=CC=CC=C2)C=C1)C(C)C JPNCJWQEOLYHTA-UHFFFAOYSA-N 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- MLCHBQKMVKNBOV-UHFFFAOYSA-N phenylphosphinic acid Chemical compound OP(=O)C1=CC=CC=C1 MLCHBQKMVKNBOV-UHFFFAOYSA-N 0.000 description 1
- 150000003007 phosphonic acid derivatives Chemical class 0.000 description 1
- XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920000083 poly(allylamine) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000004262 preparative liquid chromatography Methods 0.000 description 1
- VWQXLMJSFGLQIT-UHFFFAOYSA-N prop-2-enoyl bromide Chemical compound BrC(=O)C=C VWQXLMJSFGLQIT-UHFFFAOYSA-N 0.000 description 1
- GLFSWJDJMXUVEV-UHFFFAOYSA-N prop-2-enoyl iodide Chemical compound IC(=O)C=C GLFSWJDJMXUVEV-UHFFFAOYSA-N 0.000 description 1
- 150000003151 propanoic acid esters Chemical class 0.000 description 1
- 125000001325 propanoyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 125000004742 propyloxycarbonyl group Chemical group 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 150000003220 pyrenes Chemical class 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical compound C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 230000000630 rising effect Effects 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
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000004079 stearyl 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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000005017 substituted alkenyl group Chemical group 0.000 description 1
- 125000005415 substituted alkoxy group Chemical group 0.000 description 1
- 229960002317 succinimide Drugs 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- IQAPWZNFJIMMMQ-UHFFFAOYSA-N tert-butyl 4-(2-hydroxypropan-2-yl)benzoate Chemical compound CC(C)(C)OC(=O)C1=CC=C(C(C)(C)O)C=C1 IQAPWZNFJIMMMQ-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003536 tetrazoles Chemical group 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 125000005425 toluyl group Chemical group 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- 150000003852 triazoles Chemical group 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- WTVXIBRMWGUIMI-UHFFFAOYSA-N trifluoro($l^{1}-oxidanylsulfonyl)methane Chemical group [O]S(=O)(=O)C(F)(F)F WTVXIBRMWGUIMI-UHFFFAOYSA-N 0.000 description 1
- IZBIRHQNPWSIET-UHFFFAOYSA-M trifluoromethanesulfonate;tris(4-fluorophenyl)sulfanium Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(F)=CC=C1[S+](C=1C=CC(F)=CC=1)C1=CC=C(F)C=C1 IZBIRHQNPWSIET-UHFFFAOYSA-M 0.000 description 1
- OXWFVYDECNDRMT-UHFFFAOYSA-M trifluoromethanesulfonate;tris(4-methoxyphenyl)sulfanium Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(OC)=CC=C1[S+](C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 OXWFVYDECNDRMT-UHFFFAOYSA-M 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- XZZGCKRBJSPNEF-UHFFFAOYSA-M triphenylsulfanium;acetate Chemical compound CC([O-])=O.C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 XZZGCKRBJSPNEF-UHFFFAOYSA-M 0.000 description 1
- KOFQUBYAUWJFIT-UHFFFAOYSA-M triphenylsulfanium;hydroxide Chemical compound [OH-].C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 KOFQUBYAUWJFIT-UHFFFAOYSA-M 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 125000003774 valeryl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
-
- 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
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/14—Preparation of carboxylic acid esters from carboxylic acid halides
-
- 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
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0382—Macromolecular compounds which are rendered insoluble or differentially wettable the macromolecular compound being present in a chemically amplified negative photoresist composition
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/92—Systems containing at least three condensed rings with a condensed ring system consisting of at least two mutually uncondensed aromatic ring systems, linked by an annular structure formed by carbon chains on non-adjacent positions of the aromatic system, e.g. cyclophanes
Definitions
- the present invention relates to a cyclic compound represented by a specific chemical structural formula, a radiation-sensitive composition containing the same, and a resist pattern forming method using the composition.
- the conventional general resist material is a polymer resist material capable of forming an amorphous thin film.
- examples thereof include polymer resist materials such as polymethyl methacrylate, polyhydroxystyrene having an acid dissociable reactive group, and polyalkyl methacrylate.
- a resist thin film prepared by applying such a solution of a polymer resist material onto a substrate is irradiated with ultraviolet rays, far ultraviolet rays, electron beams, extreme ultraviolet rays (EUV), X-rays, etc., so that the thickness is 45 to 100 nm. About a line pattern is formed.
- the polymer resist material has a large molecular weight of about 10,000 to 100,000 and a wide molecular weight distribution
- roughness is generated on the surface of the fine pattern, and the pattern dimension can be controlled. It becomes difficult and the yield decreases. Therefore, there is a limit to miniaturization in conventional lithography using a polymer resist material.
- various low molecular weight resist materials have been proposed.
- the alkali-developable negative radiation-sensitive compositions described in Patent Documents 1 and 2 have insufficient heat resistance and may not form a resist pattern with a good shape.
- the alkali-developable negative radiation-sensitive composition described in Patent Documents 3 and 4 and Non-Patent Document 1 has a low molecular weight and a low molecular weight, so that the molecular size is small and the resolution is low. It is expected to provide a resist pattern with high roughness and low roughness.
- the low molecular weight cyclic polyphenol compound has a rigid cyclic structure in its skeleton, and thus provides high heat resistance despite its low molecular weight.
- currently known low molecular weight cyclic polyphenol compounds have low solubility in safety solvents used in semiconductor manufacturing processes.
- the radiation-sensitive composition containing a low molecular weight cyclic polyphenol compound and a safety solvent has low sensitivity and may not form a resist pattern with a good shape.
- improvement of a low molecular weight cyclic polyphenol compound is desired.
- an object of the present invention is to provide a cyclic compound capable of forming a radiation-sensitive composition having high solubility in a safe solvent, high sensitivity, low roughness, and a good resist pattern shape, a method for producing the same,
- the object is to provide a radiation-sensitive composition containing the same and a resist pattern forming method using the radiation-sensitive composition.
- the inventors of the present invention provide a cyclic compound having a specific structure with high solubility in a safe solvent, high sensitivity, low roughness, and good resist pattern shape.
- the present inventors have found that a radiation-sensitive composition can be formed and have reached the present invention.
- each R 0 independently represents a hydrogen atom, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted carbon atom having 1 to 20 carbon atoms.
- Linear aliphatic hydrocarbon group substituted or unsubstituted branched aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted An aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms Group, substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, substituted or unsubstituted acyl group having 1 to 20 carbon atoms, substituted or unsubstituted alkoxycarbonyl group having 2 to 20 carbon atoms, substituted or unsubstituted A substituted or unsubstituted alkyl
- a valent group (one or more groups selected from the group consisting of a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group and an ether group), At least one of R 0 is a monovalent group containing a (meth) acryloyl group. ) 2.
- each R 1 independently represents a hydrogen atom, a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted straight chain having 1 to 20 carbon atoms.
- R 2 each independently represents a hydrogen atom, a cyano group, a nitro group, a halogen atom, a substituted or unsubstituted linear aliphatic hydrocarbon group having 1 to 20 carbon atoms, a substituted or unsubstituted carbon number of 3 to 20 branched aliphatic hydrocarbon groups, substituted or unsubstituted cyclic aliphatic hydrocarbon groups having 3 to
- each R 4 independently represents a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted carbon number of 1 to 20 Linear aliphatic hydrocarbon group, substituted or unsubstituted branched aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted A substituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, or a substituted or unsubstituted alkylsilyl group having 1 to 20 carbon atoms, and p is an integer of 0 to 5 Yes, At least one
- each R 1 independently represents a hydrogen atom, a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted straight chain having 1 to 20 carbon atoms.
- R 4 each independently represents a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted linear aliphatic hydrocarbon group having 1 to 20 carbon atoms, a substituted or unsubstituted group.
- each R 4 independently represents a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted linear aliphatic group having 1 to 20 carbon atoms.
- Hydrocarbon group substituted or unsubstituted branched aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted 6 to 6 carbon atoms 20 aryl groups, substituted or unsubstituted alkoxy groups having 1 to 20 carbon atoms, or substituted or unsubstituted alkylsilyl groups having 1 to 20 carbon atoms, p is an integer from 0 to 5, R 5 is a (meth) acryloyl group. ) 5.
- a method for producing the cyclic compound according to any one of items 1 to 4 A step of subjecting one or more aldehyde compounds (A1) and one or more phenolic compounds (A2) to a condensation reaction to obtain a cyclic compound (A); A process for producing a cyclic compound, comprising a step of dehydrohalogenating the cyclic compound (A) and one or more (meth) acryloyl halides. 6).
- the aldehyde compound (A1) has 1 to 4 formyl groups and has 1 to 59 carbon atoms; 6.
- a radiation-sensitive composition comprising a solid component containing the cyclic compound according to any one of items 1 to 4 and a solvent. 8).
- Acid generator (C) that generates acid directly or indirectly by irradiation with any radiation selected from the group consisting of visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet light (EUV), X-ray and ion beam 10.
- the solid component is a cyclic compound of 50 to 99.4% by weight, an acid generator (C) of 0.001 to 49% by weight, an acid crosslinking agent (G) of 0.5 to 49% by weight, and an acid diffusion controller (E 13)
- the dissolution rate of the amorphous film after irradiation with KrF excimer laser, extreme ultraviolet light, electron beam or X-ray, or the amorphous film after heating at 20 to 250 ° C. is 5 ⁇ / sec or less.
- the radiation sensitive composition of 14 or 15. 17 Applying the radiation-sensitive composition according to any one of items 7 to 16 on a substrate to form a resist film; Exposing the resist film; And a step of developing the exposed resist film.
- a cyclic compound having high solubility in a safe solvent, high sensitivity, low roughness, and capable of forming a radiation-sensitive composition that gives a good resist pattern shape, and a method for producing the same, including the same A radiation-sensitive composition and a method for forming a resist pattern using the radiation-sensitive composition can be provided.
- the cyclic compound of this embodiment is a cyclic compound represented by the following formula (1) having a molecular weight of 500 to 5,000.
- the cyclic compound of this embodiment is useful as a resist material.
- each R 0 independently represents a hydrogen atom, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted straight chain having 1 to 20 carbon atoms.
- Chain aliphatic hydrocarbon group substituted or unsubstituted branched aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms, substituted or unsubstituted Aryl group having 6 to 20 carbon atoms, substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, substituted or unsubstituted amino group having 0 to 20 carbon atoms Substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, substituted or unsubstituted acyl group having 1 to 20 carbon atoms, substituted or unsubstituted alkoxycarbonyl group having 2 to 20 carbon atoms, substituted or unsubstituted Having 1 to 20 carbon atoms, a substituted or unsubstituted
- a group (one or more groups selected from the group consisting of a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group and an ether group), and at least one of R 0 is (meta ) A monovalent group containing an acryloyl group.
- R 0 is a monovalent group containing a (meth) acryloyl group
- anionic polymerization of cyclic compounds with an acid becomes possible.
- the radiation-sensitive composition containing the cyclic compound of this embodiment The sensitivity of (resist) can be further increased.
- EUV extreme ultraviolet
- substituted means that one or more hydrogen atoms in the functional group are a halogen atom, a hydroxyl group, a cyano group, a nitro group, a heterocyclic group, a carbon number of 1 to 20 Linear aliphatic hydrocarbon group, branched aliphatic hydrocarbon group having 3 to 20 carbon atoms, cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms, aryl group having 6 to 20 carbon atoms, and 7 to 7 carbon atoms 30 aralkyl groups, alkoxy groups having 1 to 20 carbon atoms, amino groups having 0 to 20 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, acyl groups having 1 to 20 carbon atoms, alkoxycarbonyl groups having 2 to 20 carbon atoms Means substituted with an alkyloyloxy group having 1 to 20 carbon atoms, an aryloyloxy group having 7 to 30 carbon
- the unsubstituted heterocyclic group is not particularly limited.
- a triazole group, a tetrazole group, etc. are mentioned.
- substituted heterocyclic group is not particularly limited, for example, N-methylpyridyl group, N-fluoropyridyl group, N-hydroxypyridyl group, N-cyanopyridyl group, methylbipyridyl group, methylpyrrolidyl group, methylpyrazolyl group Methylimidazolyl group, methylisoxazolyl group, methylisothiazolyl group, methylpiperidyl group, methylpiperazyl group, methylmorpholyl group, methylthiomorpholyl group, methyltriazole group, and methyltetrazole group.
- the unsubstituted straight-chain aliphatic hydrocarbon group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group, and a decyl group. , Dodecyl group, hexadecyl group, octadecyl group and the like.
- the substituted linear aliphatic hydrocarbon group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a fluoromethyl group, a 2-hydroxyethyl group, a 3-cyanopropyl group, and a 20-nitrooctadecyl group. It is done.
- the unsubstituted branched aliphatic hydrocarbon group having 3 to 20 carbon atoms is not particularly limited.
- isopropyl group, isobutyl group, tertiary butyl group, neopentyl group, 2-hexyl group, 2-octyl group examples include 2-decyl group, 2-dodecyl group, 2-hexadecyl group, 2-octadecyl group and the like.
- the substituted branched aliphatic hydrocarbon group having 3 to 20 carbon atoms is not particularly limited, and examples thereof include 1-fluoroisopropyl group and 1-hydroxy-2-octadecyl group.
- the unsubstituted cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms is not particularly limited, and examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cyclooctyl group, a cyclodecyl group, a cyclododecyl group, a cyclohexyl group, and the like.
- a sadecyl group, a cyclooctadecyl group, etc. are mentioned.
- the substituted cyclic aliphatic hydrocarbon group having 3 to 20 carbon atoms is not particularly limited, and examples thereof include a 2-fluorocyclopropyl group and a 4-cyanocyclohexyl group.
- the unsubstituted aryl group having 6 to 20 carbon atoms is not particularly limited, and examples thereof include a phenyl group and a naphthyl group.
- the substituted aryl group having 6 to 20 carbon atoms is not particularly limited, and examples thereof include a 4-methylphenyl group and a 6-fluoronaphthyl group.
- the unsubstituted aralkyl group having 7 to 30 carbon atoms is not particularly limited, and examples thereof include a methylphenyl group, an ethylphenyl group, a methylnaphthyl group, and a dimethylnaphthyl group.
- the substituted aralkyl group having 7 to 30 carbon atoms is not particularly limited, and examples thereof include a 4-fluoro-3-methylphenyl group.
- the unsubstituted alkoxy group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, a pentyloxy group, a hexyloxy group, an octyloxy group, a decyloxy group, and a dodecyloxy group.
- a methoxy group an ethoxy group, a propoxy group, a butoxy group, a pentyloxy group, a hexyloxy group, an octyloxy group, a decyloxy group, and a dodecyloxy group.
- the substituted alkoxy group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a chloromethoxy group and a bromoethoxy group.
- the unsubstituted amino group having 0 to 20 carbon atoms is not particularly limited, and examples thereof include an amino group, a methylamino group, a dimethylamino group, an ethylamino group, a diethylamino group, a dipropylamino group, and a dibutylamino group. It is done.
- the substituted amino group having 0 to 20 carbon atoms is not particularly limited, and examples thereof include a chloromethylamino group and a dibromomethylamino group.
- the unsubstituted alkenyl group having 2 to 20 carbon atoms is not particularly limited.
- the substituted alkenyl group having 2 to 20 carbon atoms is not particularly limited, and examples thereof include a chloropropynyl group.
- the unsubstituted acyl group having 1 to 20 carbon atoms is not particularly limited, in addition to the above-mentioned (meth) acryloyl group.
- the substituted acyl group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a chloroacetyl group.
- the unsubstituted alkoxycarbonyl group having 2 to 20 carbon atoms is not particularly limited, and examples thereof include a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, a butoxycarbonyl group, a pentyloxycarbonyl group, a hexyloxycarbonyl group, and an octyloxy group. Examples include carbonyl group, decyloxycarbonyl group, dodecyloxycarbonyl group, hexadecyloxycarbonyl group and the like.
- the substituted alkoxycarbonyl group having 2 to 20 carbon atoms is not particularly limited, and examples thereof include a chloromethoxycarbonyl group.
- the unsubstituted alkyloyloxy group having 1 to 20 carbon atoms is not particularly limited.
- methoxycarbonyloxy group, ethoxycarbonyloxy group, propoxycarbonyloxy group, butoxycarbonyloxy group, pentyloxycarbonyloxy group, hexyl examples include oxycarbonyloxy group, octyloxycarbonyloxy group, decyloxycarbonyloxy group, dodecyloxycarbonyloxy group, hexadecyloxycarbonyloxy group and the like.
- the substituted alkyloyloxy group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a chloromethoxycarbonyloxy group.
- the unsubstituted aryloyloxy group having 7 to 30 carbon atoms is not particularly limited, and examples thereof include a benzoyloxy group and a naphthylcarbonyloxy group.
- the substituted aryloyloxy group having 7 to 30 carbon atoms is not particularly limited, and examples thereof include a chlorobenzoyloxy group.
- the unsubstituted alkylsilyl group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a methylsilyl group, an ethylsilyl group, a propylsilyl group, a butylsilyl group, a pentylsilyl group, a hexylsilyl group, an octylsilyl group, a decylsilyl group, A dodecylsilyl group, a hexadecylsilyl group, an octadecylsilyl group, etc. are mentioned.
- the substituted alkylsilyl group having 1 to 20 carbon atoms is not particularly limited, and examples thereof include a chloromethylsilyl group.
- the monovalent group containing a (meth) acryloyl group is not particularly limited.
- the cyclic compound represented by the formula (1) is preferably a compound represented by the formula (2).
- each R 1 independently represents a hydrogen atom, a cyano group, a nitro group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted straight chain having 1 to 20 carbon atoms.
- the compound represented by the formula (2) is more preferably a compound represented by the formula (4).
- the compound represented by the formula (4) has a high solubility in a safe solvent, and can form a radiation-sensitive composition having high sensitivity, low roughness, and giving a resist pattern having a good shape.
- R 1 , R 4 and p are the same as described above.
- the compound represented by the formula (4) is more preferably a compound represented by the formula (5).
- the compound represented by the formula (5) can form a radiation-sensitive composition having high solubility in a safe solvent, high sensitivity, low roughness, and giving a resist pattern having a good shape.
- R 4 and p are the same as described above, and R 5 is a (meth) acryloyl group. More preferably, the compound represented by the formula (4) is a compound represented by the formula (6) or the formula (7).
- R 5 is the same as described above.
- R 5 is the same as described above.
- the compound represented by the formula (6) or the formula (7) has a higher solubility in a safe solvent, a higher sensitivity, a lower roughness, and a feeling that gives a resist pattern having a better shape.
- a radiation composition can be formed.
- the molecular weight of the cyclic compound represented by the above formula (1) is 500 to 5000, preferably 800 to 2000, more preferably 1000 to 2000. By setting it as the said range, when forming a resist, resolution can be improved, maintaining required film formability.
- the cyclic compound of the present embodiment can take a cis isomer and a trans isomer, but may have any structure or mixture.
- the cyclic compound of this embodiment is used as a resist component of a radiation-sensitive composition, it is preferable to use only one of a cis isomer and a trans isomer because the uniformity of the components in the resist film is high.
- a method for obtaining a cyclic compound consisting of only one of a cis isomer and a trans isomer can be performed by a known method such as separation by column chromatography or preparative liquid chromatography or optimization of a reaction solvent and a reaction temperature during production.
- the cyclic compound of this embodiment includes a step of obtaining a cyclic compound (A) by subjecting one or more aldehyde compounds (A1) and one or more phenolic compounds (A2) to a condensation reaction; And a step of dehydrohalogenating one or more (meth) acryloyl halides.
- the cyclic compound of this embodiment is a condensation of one or more compounds selected from various aromatic aldehyde compounds (A1A) and one or more compounds selected from various phenolic compounds (A2). It can be obtained by dehydrohalogenation reaction between the cyclic compound (A) obtained by the reaction and one or more compounds selected from various (meth) acryloyl halides (A3).
- the cyclic compound of this embodiment is a dehalogenation of one or more compounds selected from various phenolic compounds (A2) and one or more compounds selected from various (meth) acryloyl halides (A3). It can also be obtained by a condensation reaction between a phenolic compound (A2A) obtained by a hydrogen reaction and one or more compounds selected from various aldehyde compounds (A1).
- the aldehyde compound (A1) preferably has 1 to 59 carbon atoms, and preferably has 1 to 4 formyl groups.
- the aldehyde compound (A1) is selected from an aromatic aldehyde compound (A1A) and an aliphatic aldehyde compound (A1B).
- the aromatic aldehyde compound (A1A) is preferably a benzaldehyde compound having 7 to 24 carbon atoms.
- the aromatic aldehyde compound (A1A) is not particularly limited, and examples thereof include benzaldehyde, methylbenzaldehyde, dimethylbenzaldehyde, ethylbenzaldehyde, propylbenzaldehyde, butylbenzaldehyde, ethylmethylbenzaldehyde, isopropylmethylbenzaldehyde, diethylbenzaldehyde, anisaldehyde, naphthoaldehyde.
- the aromatic aldehyde compound (A1A) may have a linear or branched alkyl group having 1 to 4 carbon atoms, a cyano group, a hydroxyl group, a halogen or the like as long as the effects of the present invention are not impaired.
- the aromatic aldehyde compound (A1A) may be used alone or in combination of two or more.
- the aliphatic aldehyde compound (A1B) is preferably a compound having 1 to 24 carbon atoms.
- the aliphatic aldehyde compound (A1B) is not particularly limited.
- Carboxymethyl aldehydes are preferred, octanal, decanal, dodecanal, cyclohexane carboxaldehyde more preferable.
- the aliphatic aldehyde compound (A1B) may have a cyano group, a hydroxyl group, a halogen or the like as long as the effects of the present invention are not impaired.
- the aliphatic aldehyde compound (A1B) may be used alone or in combination of two or more.
- the phenolic compound (A2) preferably has 6 to 15 carbon atoms, and preferably has 1 to 3 phenolic hydroxyl groups. Although it does not specifically limit as a phenolic compound (A2), For example, a phenol, catechol, resorcinol, hydroquinone, pyrogallol etc. are mentioned, Resorcinol and pyrogallol are preferable and resorcinol is more preferable.
- the phenolic compound (A2) may have a linear or branched alkyl group having 1 to 4 carbon atoms, a cyano group, a hydroxyl group, a halogen or the like as long as the effects of the present invention are not impaired. You may use a phenolic compound (A2) individually or in combination of 2 or more types.
- (Meth) acryloyl halide (A3) is preferably, for example, (meth) acryloyl chloride, (meth) acryloyl bromide, or (meth) acryloyl iodide.
- the (meth) acryloyl halide (A3) may have a linear or branched alkyl group having 1 to 4 carbon atoms, a cyano group, a hydroxyl group, a halogen or the like as long as the effects of the present invention are not impaired.
- the (meth) acryloyl halide (A3) may be used alone or in combination of two or more.
- the cyclic compound of the present embodiment can be produced, for example, by the following method.
- an acid catalyst hydroochloric acid, sulfuric acid, paratoluenesulfonic acid, etc.
- organic solvent such as methanol or ethanol
- 0.1 mol of the phenolic compound (A2) is added to 1 mol of the aldehyde compound (A1).
- ⁇ 10 mol is reacted at 60 to 150 ° C. for about 0.5 to 20 hours.
- filtration, washing with an alcohol such as methanol, washing with water, separation by filtration, and drying are performed to obtain a cyclic compound (A) having a molecular weight of preferably 700 to 5000.
- a basic catalyst sodium hydroxide, barium hydroxide or 1,8-diazabicyclo [5.4.0] undecene-7 etc.
- the cyclic compound (A) Is obtained.
- the cyclic compound (A) can also be produced by converting the aldehyde compound (A1) into a dihalide with hydrogen halide or halogen gas, and reacting the isolated dihalide with the phenolic compound (A2).
- (meth) acryloyl halide (A3) is added to 1 mol of the cyclic compound (A).
- a base catalyst such as triethylamine, ammonia or sodium hydroxide
- organic solvent such as N-methyl-2-pyrrolidone
- (meth) acryloyl halide (A3) is added to 1 mol of the cyclic compound (A).
- 0.1-100 mol is reacted at 0-150 ° C. for about 0.5-20 hours.
- the phenolic hydroxyl group in the cyclic compound (A) can be converted into a (meth) acryloyl group.
- the cyclic compound shown by Formula (1) is obtained by drying after filtration, washing with alcohols such as methanol, washing with water, and separation by filtration.
- the solubility of the obtained cyclic compound in the semiconductor safety solvent is improved, it is more preferable to use at least one of the aldehyde compound (A1) or the phenolic compound (A2).
- a purification step may be performed as necessary in order to improve the purity in the cyclic compound and reduce the amount of remaining metal. Further, if the acid catalyst and the co-catalyst remain, generally the storage stability of the radiation-sensitive composition is lowered, and if the basic catalyst remains, the sensitivity of the radiation-sensitive composition is generally lowered. Purification may be performed.
- the purification method can be performed by a known method as long as the cyclic compound is not denatured, and is not particularly limited.
- a method of washing with water a method of washing with an acidic aqueous solution, a method of washing with a basic aqueous solution, ion exchange Examples include a method of treating with a resin and a method of treating with silica gel column chromatography.
- These purification methods are more preferably performed in combination of two or more.
- acidic aqueous solution, basic aqueous solution, ion exchange resin, and silica gel column chromatography select the optimal one according to the metal to be removed, the amount and type of acidic compound and basic compound, the type of cyclic compound to be purified, etc.
- Amberlyst 15J-HG Dry made by Organo can be mentioned. You may dry after refinement
- cyclic compound of this embodiment When the cyclic compound of this embodiment is used as a component of a radiation sensitive composition, an amorphous film can be formed by spin coating. Moreover, the cyclic compound of this embodiment can be applied to a general semiconductor manufacturing process.
- the cyclic compound of the present embodiment is useful as a negative resist material that becomes a compound that is hardly soluble in a developer by irradiation with a KrF excimer laser, extreme ultraviolet light, electron beam, or X-ray.
- the mechanism by which the cyclic compound of the present embodiment becomes a compound that is hardly soluble in the developer is not clear, but the cyclic reaction between the compounds by irradiating the cyclic compound with KrF excimer laser, extreme ultraviolet light, electron beam or X-ray. Is considered to be a compound that is hardly soluble in an alkaline developer.
- the resist pattern obtained using the cyclic compound of this embodiment has a very small line edge roughness (LER).
- the cyclic compound of the present embodiment can be used as a main component of a negative radiation-sensitive composition, and can be added to the radiation-sensitive composition as an additive for improving sensitivity and etching resistance, for example. it can.
- the use amount of the cyclic compound of the present embodiment as an additive is preferably 1 to 49.999% by weight based on the total solid component weight of the radiation-sensitive composition.
- the glass transition temperature of the cyclic compound of the present embodiment is preferably 100 ° C. or higher, more preferably 120 ° C. or higher, still more preferably 140 ° C. or higher, and particularly preferably 150 ° C. or higher.
- the semiconductor lithography process has heat resistance capable of maintaining a pattern shape, and performance such as high resolution is improved.
- the crystallization calorific value obtained by differential scanning calorimetric analysis of the glass transition temperature of the cyclic compound of the present embodiment is preferably less than 20 J / g.
- (crystallization temperature) ⁇ (glass transition temperature) is preferably 70 ° C. or higher, more preferably 80 ° C. or higher, further preferably 100 ° C. or higher, particularly preferably 130 ° C. or higher. is there.
- the crystallization heat generation amount is less than 20 J / g, or (crystallization temperature) ⁇ (glass transition temperature) is within the above range, an amorphous film can be easily formed by spin coating the radiation-sensitive composition.
- the film formability required for the resist can be maintained for a long time, and the resolution can be improved.
- the crystallization calorific value, the crystallization temperature, and the glass transition temperature can be determined as follows by differential scanning calorimetry using DSC / TA-50WS manufactured by Shimadzu Corporation.
- About 10 mg of a sample is put in an aluminum non-sealed container and heated to a melting point or higher at a temperature rising rate of 20 ° C./min in a nitrogen gas stream (50 mL / min).
- the temperature is raised to the melting point or higher at a heating rate of 20 ° C./min in a nitrogen gas stream (30 mL / min) again. Further, after rapid cooling, the temperature is increased again to 400 ° C.
- the temperature at the midpoint of the step difference of the baseline that has changed in a step shape (where the specific heat has changed to half) is the glass transition temperature (Tg), and the temperature of the exothermic peak that appears thereafter is the crystallization temperature.
- Tg glass transition temperature
- the calorific value is obtained from the area of the region surrounded by the exothermic peak and the baseline, and is defined as the crystallization calorific value.
- the cyclic compound of the present embodiment preferably has low sublimation property under normal pressure at 100 ° C. or lower, preferably 120 ° C. or lower, more preferably 130 ° C. or lower, further preferably 140 ° C. or lower, particularly preferably 150 ° C. or lower.
- the low sublimation property means that in thermogravimetric analysis, the weight loss when held at a predetermined temperature for 10 minutes is 10%, preferably 5%, more preferably 3%, still more preferably 1%, particularly preferably. It shows that it is 0.1% or less. Since the sublimation property is low, it is possible to prevent exposure apparatus from being contaminated by outgas during exposure. Moreover, a favorable pattern shape can be obtained with low LER.
- the cyclic compound of the present embodiment is preferably F ⁇ 3.0 (F represents the total number of atoms / (total number of carbon atoms ⁇ total number of oxygen atoms)), and more preferably F ⁇ 2.5. is there.
- the cyclic compound of this embodiment is excellent in dry etching resistance by satisfying the above conditions.
- the cyclic compound of the present embodiment includes propylene glycol monomethyl ether acetate (PGMEA), propylene glycol monomethyl ether (PGME), cyclohexanone (CHN), cyclopentanone (CPN), 2-heptanone, anisole, butyl acetate, ethyl propionate and In a solvent selected from ethyl lactate and exhibiting the highest solubility for cyclic compounds, it is preferably dissolved at 23 ° C., preferably 1% by weight or more, more preferably 5% by weight or more, and even more preferably 10% by weight or more.
- cyclic compound of this embodiment can be used in a semiconductor manufacturing process in actual production by satisfying the above conditions.
- a nitrogen atom may be introduced into the cyclic compound of the present embodiment as long as the effects of the present invention are not impaired.
- the ratio of the number of nitrogen atoms to the total number of constituent atoms of the cyclic compound is preferably 0.1 to 40%, more preferably 0.1 to 20%, and preferably 0.1 to 10%. Further preferred is 0.1 to 5%.
- transduced into the cyclic compound of this embodiment is a secondary or tertiary nitrogen atom, and it is more preferable that it is a tertiary nitrogen atom.
- the cyclic compound of the present embodiment is irradiated with visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet light (EUV), X-ray and ion beam, or a chemical reaction induced thereby.
- a crosslinking reactive group that causes a crosslinking reaction may be introduced. Introduction of the crosslinking reactive group into the cyclic compound of the present embodiment is performed, for example, by reacting the cyclic compound and the crosslinking reactive group introduction reagent in the presence of a base catalyst.
- the crosslinking reactive group is not particularly limited, and examples thereof include a carbon-carbon multiple bond, an epoxy group, an azide group, a halogenated phenyl group, and a chloromethyl group.
- the crosslinking reactive group introduction reagent is not particularly limited, and examples thereof include carboxylic acid derivatives such as acids, acid chlorides, acid anhydrides, dicarbonates, and alkyl halides having such a crosslinking reactive group.
- a radiation-sensitive composition containing a cyclic compound having a crosslinking reactive group is also useful as a non-polymeric radiation-sensitive composition having high resolution, high heat resistance and solvent solubility.
- a non-acid-dissociable functional group may be introduced into at least one of the phenolic hydroxyl groups as long as the effects of the present invention are not impaired.
- the non-acid-dissociable functional group refers to a characteristic group that does not cleave in the presence of an acid and does not generate an alkali-soluble group.
- Non-acid-dissociable functional groups include, for example, C1-20 alkyl groups, C3-20 cycloalkyl groups, C6-20 aryl groups, C1-20 alkoxyl groups that are not decomposed by the action of an acid, Examples thereof include a functional group selected from the group consisting of a cyano group, a nitro group, a hydroxyl group, a heterocyclic group, a halogen, a carboxyl group, a C1-20 alkylsilane, and derivatives thereof.
- a naphthoquinone diazide ester group may be introduced into at least one of the phenolic hydroxyl groups as long as the effects of the present invention are not impaired.
- a cyclic compound having a naphthoquinonediazide ester group introduced into at least one phenolic hydroxyl group can be used as a main component of a negative radiation-sensitive composition as a main component, or as a main component of a positive radiation-sensitive composition. It can be used or added to the radiation sensitive composition as an acid generator or additive.
- an acid-generating functional group that generates an acid upon irradiation with radiation may be introduced into at least one of the phenolic hydroxyl groups in the cyclic compound of the present embodiment.
- a cyclic compound in which an acid-generating functional group is introduced into at least one phenolic hydroxyl group can be used as a main component of a negative radiation-sensitive composition by itself as a main component, and a radiation-sensitive composition as an additive. Can be added to.
- the radiation-sensitive composition according to this embodiment contains a solid component containing the aforementioned cyclic compound and a solvent.
- the solid component is preferably 1 to 80% by weight, and the ratio of the cyclic compound to the total weight of the solid component is 50 to 99.999% by weight. More preferably.
- the radiation sensitive composition of the present embodiment can form an amorphous film by spin coating.
- the dissolution rate of the amorphous film formed by spin-coating the radiation-sensitive composition of the present embodiment in a developer at 23 ° C. is preferably 10 ⁇ / sec or more, more preferably 10 to 10000 ⁇ / sec. More preferably, it is 100 to 1000 kg / sec.
- the dissolution rate is 10 ⁇ / sec or more
- the radiation-sensitive composition of the present embodiment can be dissolved in a developer and used as a resist.
- the resolution of the radiation-sensitive composition of the present embodiment may be improved when the dissolution rate is 10,000 kg / sec or less.
- the dissolution rate of the amorphous film formed by spin-coating the radiation-sensitive composition of the present embodiment in a developer at 23 ° C. at a portion exposed by radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray is It is preferably 5 K / sec or less, more preferably 0.05 to 5 K / sec, and further preferably 0.0005 to 5 K / sec.
- the radiation-sensitive composition of the present embodiment is insoluble in a developer when the dissolution rate is 5 kg / sec or less, and can be used as a resist. Further, when the dissolution rate of the radiation-sensitive composition of the present embodiment is 0.0005 K / sec or more, the resolution may be improved. This is presumed to be because the micro surface portion of the cyclic compound is dissolved and LER is reduced. There is also an effect of reducing defects.
- the radiation-sensitive composition of the present embodiment is preferably 1 to 80% by weight of the solid component and 20 to 99% by weight of the solvent, more preferably 1 to 50% by weight of the solid component, and 50% of the solvent. It is ⁇ 99 wt%, more preferably 2 to 40 wt% solid component and 60 to 98 wt% solvent, particularly preferably 2 to 10 wt% solid component and 90 to 98 wt% solvent.
- the amount of the above-mentioned cyclic compound is the total weight of the solid component (the above-mentioned cyclic compound, the acid generator (C), the acid cross-linking agent (G), and the acid diffusion controller described later). 50 to 99.4% by weight, more preferably 55 to 90% by weight of (E) and the sum of solid components optionally used such as other components (F), and so on)
- the amount is preferably 60 to 80% by weight, particularly preferably 60 to 70% by weight.
- the radiation-sensitive composition of this embodiment is an acid directly or indirectly by irradiation with radiation selected from visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet light (EUV), X-ray and ion beam. It is preferable to include one or more acid generators (C) that generate water.
- the content of the acid generator (C) is preferably 0.001 to 49% by weight, more preferably 1 to 40% by weight, still more preferably 3 to 30% by weight, and more preferably 10 to 25% by weight based on the total weight of the solid components. Particularly preferred.
- a pattern profile with high sensitivity and low edge roughness can be obtained when the content of the acid generator (C) is within the above range.
- the acid generation method is not limited as long as the acid is generated in the system. If excimer laser is used instead of ultraviolet rays such as g-line and i-line, finer processing is possible, and if high-energy rays are used electron beams, extreme ultraviolet rays, X-rays, ion beams, further fine processing is possible. Is possible.
- the acid generator (C) is preferably at least one selected from the group consisting of compounds represented by the following formulas (7-1) to (7-8).
- R 13 may be the same or different, and each independently represents a hydrogen atom, a linear, branched or cyclic alkyl group, a linear, branched or cyclic alkoxy group, A hydroxyl group or a halogen atom;
- X ⁇ is a sulfonate ion or a halide ion having an alkyl group, an aryl group, a halogen-substituted alkyl group or a halogen-substituted aryl group.
- the compound represented by the formula (7-1) includes triphenylsulfonium trifluoromethanesulfonate, triphenylsulfonium nonafluoro-n-butanesulfonate, diphenyltolylsulfonium nonafluoro-n-butanesulfonate, triphenylsulfonium perfluoro-n- Octane sulfonate, diphenyl-4-methylphenylsulfonium trifluoromethanesulfonate, di-2,4,6-trimethylphenylsulfonium trifluoromethanesulfonate, diphenyl-4-t-butoxyphenylsulfonium trifluoromethanesulfonate, diphenyl-4-t-butoxyphenyl Sulfonium nonafluoro-n-butanesulfonate, diphenyl-4-hydroxyphenylsulfonium trifluoromethane Sulfon
- R 14 s may be the same or different and each independently represents a hydrogen atom, a linear, branched or cyclic alkyl group, a linear, branched or cyclic alkoxy group, Represents a hydroxyl group or a halogen atom, X ⁇ is as defined above.
- the compound represented by the formula (7-2) includes bis (4-t-butylphenyl) iodonium trifluoromethanesulfonate, bis (4-t-butylphenyl) iodonium nonafluoro-n-butanesulfonate, bis (4-t -Butylphenyl) iodonium perfluoro-n-octanesulfonate, bis (4-t-butylphenyl) iodonium-p-toluenesulfonate, bis (4-t-butylphenyl) iodoniumbenzenesulfonate, bis (4-t-butylphenyl) ) Iodonium-2-trifluoromethylbenzenesulfonate, bis (4-tert-butylphenyl) iodonium-4-trifluoromethylbenzenesulfonate, bis (4-tert-butylphenyl) iodonium-2,4-
- Q represents an alkylene group, an arylene group or an alkoxylene group
- R 15 represents an alkyl group, an aryl group, a halogen-substituted alkyl group or a halogen-substituted aryl group.
- the compound represented by the formula (7-3) includes N- (trifluoromethylsulfonyloxy) succinimide, N- (trifluoromethylsulfonyloxy) phthalimide, N- (trifluoromethylsulfonyloxy) diphenylmaleimide, N- ( Trifluoromethylsulfonyloxy) bicyclo [2.2.1] hept-5-ene-2,3-dicarboximide, N- (trifluoromethylsulfonyloxy) naphthylimide, N- (10-camphorsulfonyloxy) Succinimide, N- (10-camphorsulfonyloxy) phthalimide, N- (10-camphorsulfonyloxy) diphenylmaleimide, N- (10-camphorsulfonyloxy) bicyclo [2.2.1] hept-5-ene-2 , 3-Dicarboximide, N (10-camphorsulfonyloxy) naph
- R 16 may be the same or different, and each independently represents an optionally substituted linear, branched or cyclic alkyl group, an optionally substituted aryl group, and optionally substituted. A heteroaryl group or an optionally substituted aralkyl group.
- the compound represented by the formula (7-4) is diphenyl disulfone, di (4-methylphenyl) disulfone, dinaphthyl disulfone, di (4-tert-butylphenyl) disulfone, di (4-hydroxyphenyl) disulfone. At least one selected from the group consisting of di (3-hydroxynaphthyl) disulfone, di (4-fluorophenyl) disulfone, di (2-fluorophenyl) disulfone and di (4-trifluoromethylphenyl) disulfone It is preferable.
- R 17 may be the same or different and each independently represents an optionally substituted linear, branched or cyclic alkyl group, an optionally substituted aryl group, and optionally substituted. A heteroaryl group or an optionally substituted aralkyl group.
- the compound represented by the formula (7-5) is ⁇ - (methylsulfonyloxyimino) -phenylacetonitrile, ⁇ - (methylsulfonyloxyimino) -4-methoxyphenylacetonitrile, ⁇ - (trifluoromethylsulfonyloxyimino).
- R 18 may be the same or different and each independently represents a halogenated alkyl group having one or more chlorine atoms and one or more bromine atoms.
- the halogenated alkyl group preferably has 1 to 5 carbon atoms.
- R 19 and R 20 are each independently an alkyl group having 1 to 3 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, or cyclopentyl.
- Group, cycloalkyl group such as cyclohexyl group, alkoxyl group having 1 to 3 carbon atoms such as methoxy group, ethoxy group, propoxy group, or aryl group such as phenyl group, toluyl group, naphthyl group, preferably 6 carbon atoms ⁇ 10 aryl groups.
- L 19 and L 20 are each independently an organic group having a 1,2-naphthoquinonediazide group.
- Specific examples of the organic group having a 1,2-naphthoquinonediazide group include a 1,2-naphthoquinonediazide-4-sulfonyl group, a 1,2-naphthoquinonediazide-5-sulfonyl group, and a 1,2-naphthoquinonediazide- Preferred examples include 1,2-quinonediazidosulfonyl groups such as a 6-sulfonyl group.
- 1,2-naphthoquinonediazido-4-sulfonyl group and 1,2-naphthoquinonediazide-5-sulfonyl group are preferable.
- p is an integer of 1 to 3
- q is an integer of 0 to 4
- 1 ⁇ p + q ⁇ 5 is preferable.
- J 19 is a single bond, a polymethylene group having 1 to 4 carbon atoms, a cycloalkylene group, a phenylene group, a group represented by the following formula (7-7-1), a carbonyl group, an ester group, an amide group or an ether group.
- Y 19 represents a hydrogen atom, an alkyl group or an aryl group
- X 20 each independently represents a group represented by the following formula (7-8-1).
- Z 22 each independently represents an alkyl group, a cycloalkyl group or an aryl group, R 22 represents an alkyl group, a cycloalkyl group or an alkoxyl group, and r represents 0 to 3 Is an integer.
- Examples of other acid generators include, but are not limited to, bis (p-toluenesulfonyl) diazomethane, bis (2,4-dimethylphenylsulfonyl) diazomethane, bis (tert-butylsulfonyl) diazomethane, bis (n-butylsulfonyl) ) Diazomethane, bis (isobutylsulfonyl) diazomethane, bis (isopropylsulfonyl) diazomethane, bis (n-propylsulfonyl) diazomethane, bis (cyclohexylsulfonyl) diazomethane, bis (isopropylsulfonyl) diazomethane, 1,3-bis (cyclohexylsulfonylazomethyl) Sulfonyl) propane, 1,4-bis (phenylsulfonylazomethylsulfony
- acid generators having an aromatic ring are preferable, and acid generators represented by formula (7-1) or (7-2) are more preferable.
- An acid generator having a sulfonate ion having X ⁇ in formula (7-1) or (7-2) having an aryl group or a halogen-substituted aryl group is more preferred, and an acid generator having a sulfonate ion having an aryl group are particularly preferable, and diphenyltrimethylphenylsulfonium-p-toluenesulfonate, triphenylsulfonium-p-toluenesulfonate, triphenylsulfonium trifluoromethanesulfonate, and triphenylsulfonium nonafluoromethanesulfonate are particularly preferable.
- the acid generator (C) can be used alone or in combination of two or more.
- the radiation-sensitive composition of the present embodiment preferably contains one or more acid crosslinking agents (G).
- the acid cross-linking agent (G) is a compound that can cross-link the above-mentioned cyclic compound within a molecule or between molecules in the presence of an acid generated from the acid generator (C).
- Examples of such an acid crosslinking agent (G) include compounds having one or more groups (hereinafter referred to as “crosslinkable groups”) capable of crosslinking the cyclic compound of the formula (1).
- crosslinkable group examples are not particularly limited. For example, (i) hydroxy (C1-C6 alkyl group), C1-C6 alkoxy (C1-C6 alkyl group), acetoxy (C1-C6 alkyl group) ) Or a group derived therefrom; (ii) a carbonyl group such as formyl group or carboxy (C1-C6 alkyl group) or a group derived therefrom; (iii) dimethylaminomethyl group, diethylaminomethyl Group, nitrogen-containing group such as dimethylolaminomethyl group, diethylolaminomethyl group, morpholinomethyl group; (iv) glycidyl group-containing group such as glycidyl ether group, glycidyl ester group, glycidylamino group; (v) benzyl C1-C6 allyloxy (C1-C) such as oxymethyl group and benzoyloxymethyl group
- the acid crosslinking agent having a crosslinkable group (G) is not particularly limited.
- the acid crosslinking agent (G) compounds having phenolic hydroxyl groups, and compounds and resins imparted with crosslinking properties by introducing the crosslinking groups into acidic functional groups in the alkali-soluble resin can be used.
- the introduction ratio of the crosslinkable group is usually 5 to 100 mol%, preferably 10 to 60 mol%, more preferably based on the total acidic functional group in the compound having a phenolic hydroxyl group and the alkali-soluble resin. Is adjusted to 15-40 mol%. It is preferable for the introduction rate of the crosslinkable group to be in the above-mentioned range since a sufficient crosslinking reaction occurs and a decrease in the remaining film rate, a pattern swelling phenomenon, meandering, and the like are avoided.
- the acid crosslinking agent (G) is preferably an alkoxyalkylated urea compound or a resin thereof, or an alkoxyalkylated glycoluril compound or a resin thereof.
- Particularly preferred acid crosslinking agents (G) include compounds represented by the following formulas (8-1) to (8-3) and alkoxymethylated melamine compounds (acid crosslinking agent (G1)).
- R 7 each independently represents a hydrogen atom, an alkyl group or an acyl group
- R 8 to R 11 each independently represents a hydrogen atom, a hydroxyl group
- And represents an alkyl group or an alkoxyl group
- X 2 represents a single bond, a methylene group or an oxygen atom.
- the alkyl group represented by R 7 preferably has 1 to 6 carbon atoms, more preferably 1 to 3 carbon atoms, and examples thereof include a methyl group, an ethyl group, and a propyl group.
- the acyl group represented by R 7 preferably has 2 to 6 carbon atoms, more preferably 2 to 4 carbon atoms, and examples thereof include an acetyl group and a propionyl group.
- the alkyl group represented by R 8 to R 11 preferably has 1 to 6 carbon atoms, more preferably 1 to 3 carbon atoms, and examples thereof include a methyl group, an ethyl group, and a propyl group.
- the alkoxyl group represented by R 8 to R 11 preferably has 1 to 6 carbon atoms, more preferably 1 to 3 carbon atoms, and examples thereof include a methoxy group, an ethoxy group, and a propoxy group.
- X 2 is preferably a single bond or a methylene group.
- R 7 to R 11 and X 2 may be substituted with an alkyl group such as a methyl group or an ethyl group, an alkoxy group such as a methoxy group or an ethoxy group, a hydroxyl group, or a halogen atom.
- the plurality of R 7 and R 8 to R 11 may be the same or different.
- Specific examples of the compound represented by the formula (8-2) include, but are not limited to, N, N, N, N, N-tetra (methoxymethyl) glycoluril, N, N, N, N-tetra ( Ethoxymethyl) glycoluril, N, N, N, N-tetra (n-propoxymethyl) glycoluril, N, N, N-tetra (isopropoxymethyl) glycoluril, N, N, N, N-tetra (N-Butoxymethyl) glycoluril, N, N, N, N-tetra (t-butoxymethyl) glycoluril and the like can be mentioned. Of these, N, N, N, N-tetra (methoxymethyl) glycoluril is particularly preferable.
- alkoxymethylated melamine compounds include N, N, N, N, N, N-hexa (methoxymethyl) melamine, N, N, N, N, N-hexa (ethoxymethyl) melamine N, N, N, N, N-hexa (n-propoxymethyl) melamine, N, N, N, N, N-hexa (isopropoxymethyl) melamine, N, N, N, N, Examples thereof include N, N-hexa (n-butoxymethyl) melamine, N, N, N, N, N-hexa (t-butoxymethyl) melamine and the like. Among these, N, N, N, N, N, N-hexa (methoxymethyl) melamine is particularly preferable.
- the acid cross-linking agent (G1) is obtained by, for example, condensing a urea compound or glycoluril compound and formalin to introduce a methylol group, and then ether with lower alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, and butyl alcohol. Then, the reaction solution is cooled and the precipitated compound or its resin is recovered.
- the acid cross-linking agent (G1) can also be obtained as a commercial product such as CYMEL (trade name, manufactured by Mitsui Cyanamid) or Nicalac (manufactured by Sanwa Chemical Co., Ltd.).
- the molecule has 1 to 6 benzene rings, and has at least two hydroxyalkyl groups and / or alkoxyalkyl groups in the molecule. And / or a phenol derivative in which an alkoxyalkyl group is bonded to any one of the benzene rings (acid crosslinking agent (G2)).
- the molecular weight is 1500 or less
- the molecule has 1 to 6 benzene rings
- the hydroxyalkyl group and / or alkoxyalkyl group has 2 or more in total
- the hydroxyalkyl group and / or alkoxyalkyl group is the benzene ring.
- Mention may be made of phenol derivatives formed by bonding to any one or a plurality of benzene rings.
- hydroxyalkyl group bonded to the benzene ring those having 1 to 6 carbon atoms such as hydroxymethyl group, 2-hydroxyethyl group, and 2-hydroxy-1-propyl group are preferable.
- the alkoxyalkyl group bonded to the benzene ring is preferably one having 2 to 6 carbon atoms. Specifically, methoxymethyl group, ethoxymethyl group, n-propoxymethyl group, isopropoxymethyl group, n-butoxymethyl group, isobutoxymethyl group, sec-butoxymethyl group, t-butoxymethyl group, 2-methoxyethyl Group or 2-methoxy-1-propyl group is preferred.
- L 1 to L 8 may be the same or different and each independently represents a hydroxymethyl group, a methoxymethyl group or an ethoxymethyl group.
- a phenol derivative having a hydroxymethyl group is obtained by reacting a phenol compound not having a corresponding hydroxymethyl group (a compound in which L 1 to L 8 are hydrogen atoms in the above formula) with formaldehyde in the presence of a base catalyst. Can do.
- the reaction temperature is preferably 60 ° C. or lower. Specifically, it can be synthesized by the methods described in JP-A-6-282067, JP-A-7-64285 and the like.
- a phenol derivative having an alkoxymethyl group can be obtained by reacting a corresponding phenol derivative having a hydroxymethyl group with an alcohol in the presence of an acid catalyst.
- the reaction temperature is preferably 100 ° C. or lower. Specifically, it can be synthesized by the method described in EP632003A1 and the like.
- a phenol derivative having a hydroxymethyl group and / or an alkoxymethyl group synthesized in this manner is preferable in terms of stability during storage, but a phenol derivative having an alkoxymethyl group is particularly preferable from the viewpoint of stability during storage.
- the acid crosslinking agent (G2) may be used alone or in combination of two or more.
- Another particularly preferable acid crosslinking agent (G) is a compound having at least one ⁇ -hydroxyisopropyl group (acid crosslinking agent (G3)).
- the structure is not particularly limited as long as it has an ⁇ -hydroxyisopropyl group.
- the hydrogen atom of the hydroxyl group in the ⁇ -hydroxyisopropyl group is one or more acid dissociable groups (R—COO— group, R—SO 2 — group, etc., R is a straight chain having 1 to 12 carbon atoms)
- R—COO— group, R—SO 2 — group, etc. R is a straight chain having 1 to 12 carbon atoms
- a hydrocarbon group having 3 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a 1-branched alkyl group having 3 to 12 carbon atoms and an aromatic hydrocarbon group having 6 to 12 carbon atoms (Represents a substituent selected from the group).
- the compound having an ⁇ -hydroxyisopropyl group is not particularly limited, and examples thereof include substituted or unsubstituted aromatic compounds containing at least one ⁇ -hydroxyisopropyl group, diphenyl compounds, naphthalene compounds, and furan compounds. 1 type or 2 types or more are mentioned.
- benzene compound (1) (hereinafter referred to as “benzene compound (1)”), represented by the following general formula (9-2): Compound (hereinafter referred to as “diphenyl compound (2)”), a compound represented by the following general formula (9-3) (hereinafter referred to as “naphthalene compound (3)”), and the following general formula And a compound represented by (9-4) (hereinafter referred to as “furan compound (4)”).
- benzene compound (1) represented by the following general formula (9-2): Compound (hereinafter referred to as “diphenyl compound (2)”), a compound represented by the following general formula (9-3) (hereinafter referred to as “naphthalene compound (3)”), and the following general formula And a compound represented by (9-4) (hereinafter referred to as “furan compound (4)”).
- each A 2 independently represents an ⁇ -hydroxyisopropyl group or a hydrogen atom, and at least one A 2 is an ⁇ -hydroxyisopropyl group.
- R 51 represents a hydrogen atom, a hydroxyl group, a linear or branched alkylcarbonyl group having 2 to 6 carbon atoms, or a linear or branched structure having 2 to 6 carbon atoms. An alkoxycarbonyl group is shown.
- R 52 represents a single bond, a linear or branched alkylene group having 1 to 5 carbon atoms, —O—, —CO— or —COO—.
- R 53 and R 54 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 6 carbon atoms.
- benzene compound (1) examples include, but are not limited to, ⁇ -hydroxyisopropylbenzene, 1,3-bis ( ⁇ -hydroxyisopropyl) benzene, 1,4-bis ( ⁇ -hydroxyisopropyl).
- ⁇ -hydroxyisopropylbenzenes such as benzene, 1,2,4-tris ( ⁇ -hydroxyisopropyl) benzene, 1,3,5-tris ( ⁇ -hydroxyisopropyl) benzene; 3- ⁇ -hydroxyisopropylphenol, 4- ⁇ -hydroxyisopropylphenols such as ⁇ -hydroxyisopropylphenol, 3,5-bis ( ⁇ -hydroxyisopropyl) phenol, 2,4,6-tris ( ⁇ -hydroxyisopropyl) phenol; 3- ⁇ -hydroxyisopropylphenyl Methyl ketone, 4- ⁇ -hy Roxyisopropylphenyl methyl ketone, 4- ⁇ -hydroxyisopropylphenyl ethyl ketone, 4- ⁇ -hydroxyisopropylphenyl n-propyl ketone, 4- ⁇ -hydroxyisopropylphenyl isopropyl ketone, 4- ⁇ -hydroxyisopropylphenyl n- But
- diphenyl compound (2) is not particularly limited, but examples thereof include 3- ⁇ -hydroxyisopropylbiphenyl, 4- ⁇ -hydroxyisopropylbiphenyl, 3,5-bis ( ⁇ -hydroxyisopropyl) biphenyl.
- the naphthalene-based compound (3) is not specifically limited.
- the furan compound (4) is not particularly limited, but examples thereof include 3- ( ⁇ -hydroxyisopropyl) furan, 2-methyl-3- ( ⁇ -hydroxyisopropyl) furan, 2-methyl- 4- ( ⁇ -hydroxyisopropyl) furan, 2-ethyl-4- ( ⁇ -hydroxyisopropyl) furan, 2-n-propyl-4- ( ⁇ -hydroxyisopropyl) furan, 2-isopropyl-4- ( ⁇ -hydroxy) Isopropyl) furan, 2-n-butyl-4- ( ⁇ -hydroxyisopropyl) furan, 2-t-butyl-4- ( ⁇ -hydroxyisopropyl) furan, 2-n-pentyl-4- ( ⁇ -hydroxyisopropyl) Furan, 2,5-dimethyl-3- ( ⁇ -hydroxyisopropyl) furan, 2,5-diethyl-3- ( ⁇ -hydroxy) Cyisopropyl) furan, 3,4-bis ( ⁇ -hydroxyisopropyl) furan, 3,
- the acid crosslinking agent (G3) is preferably a compound having two or more free ⁇ -hydroxyisopropyl groups, the benzene compound (1) having two or more ⁇ -hydroxyisopropyl groups, and two or more ⁇ -hydroxyisopropyl groups. More preferably, the diphenyl compound (2) having two or more ⁇ -hydroxyisopropyl groups, and the naphthalene compound (3) having two or more ⁇ -hydroxyisopropyl groups, ⁇ -hydroxyisopropylbiphenyls having two or more ⁇ -hydroxyisopropyl groups, ⁇ -hydroxy A naphthalene compound (3) having two or more isopropyl groups is particularly preferred.
- the acid cross-linking agent (G3) is usually obtained by a method in which a acetyl group-containing compound such as 1,3-diacetylbenzene is reacted with a Grignard reagent such as CH 3 MgBr to be methylated and then hydrolyzed. It can be obtained by a method in which an isopropyl group-containing compound such as diisopropylbenzene is oxidized with oxygen or the like to generate a peroxide and then reduced.
- the content of the acid crosslinking agent (G) is preferably 0.5 to 49% by weight, more preferably 0.5 to 40% by weight, based on the total weight of the solid component, 1 to 30% by weight is more preferred, and 2 to 20% by weight is particularly preferred.
- the content of the acid crosslinking agent (G) is 0.5% by weight or more, the radiation-sensitive composition of the present embodiment improves the effect of suppressing the solubility of the resist film in an alkaline developer, and the remaining film ratio
- the content of the acid cross-linking agent (G) is 50% by weight or less. It is preferable because the decrease can be suppressed.
- the blending ratio of at least one compound selected from the acid crosslinking agent (G1), the acid crosslinking agent (G2) and the acid crosslinking agent (G3) in the acid crosslinking agent (G) is not particularly limited. Various ranges can be used depending on the type of substrate used when forming the pattern.
- the content of the alkoxymethylated melamine compound and / or the compound represented by (9-1) to (9-3) is 50 to 99% by weight, preferably 60 to 99% by weight, More preferred is 70 to 98% by weight, and still more preferred is 80 to 97% by weight.
- the content of the alkoxymethylated melamine compound and / or the compounds represented by (9-1) to (9-3) is 50% by weight or more of the total acid crosslinking agent component. Therefore, the resolution can be improved, and it is preferable to set it to 99% by weight or less because it is easy to obtain a rectangular cross-sectional shape as the pattern cross-sectional shape.
- the radiation-sensitive composition of the present embodiment may further contain an acid diffusion controller (E).
- the acid diffusion control agent (E) is a compound having a function of controlling an undesired chemical reaction in an unexposed region by controlling diffusion of an acid generated from an acid generator by irradiation in a resist film. .
- the radiation sensitive composition of this embodiment improves storage stability by containing such an acid diffusion controller (E). In addition, the resolution is improved, and a change in the line width of the resist pattern due to fluctuations in the holding time before irradiation and the holding time after irradiation can be suppressed, and the process stability is extremely excellent.
- the acid diffusion controller (E) is not particularly limited, and examples thereof include radiolytic decomposable basic compounds such as nitrogen atom-containing basic compounds, basic sulfonium compounds, and basic iodonium compounds.
- the acid diffusion controller (E) can be used alone or in combination of two or more.
- the acid diffusion control agent (E) is not particularly limited, and examples thereof include nitrogen-containing organic compounds and basic compounds that are decomposed by exposure.
- examples of the nitrogen-containing organic compound include the following general formula (10):
- nitrogen-containing compound (I) a diamino compound having two nitrogen atoms in the same molecule
- nitrogen-containing compound (II) a diamino compound having two nitrogen atoms in the same molecule
- nitrogen-containing compound (II) a diamino compound having two nitrogen atoms in the same molecule
- nitrogen-containing compound (III) polyamino compounds and polymers having three or more compounds
- nitrogen-containing compound (III) examples thereof include polyamino compounds and polymers having three or more compounds
- amide group-containing compounds amide group-containing compounds
- urea compounds urea compounds
- nitrogen-containing heterocyclic compounds nitrogen-containing heterocyclic compounds
- an acid diffusion control agent (E) may be used individually by 1 type, and may use 2 or more types together.
- R 61 , R 62 and R 63 each independently represent a hydrogen atom, a linear, branched or cyclic alkyl group, an aryl group or an aralkyl group.
- the alkyl group, aryl group or aralkyl group may be unsubstituted or substituted with a hydroxyl group or the like.
- the linear, branched or cyclic alkyl group is not particularly limited, and examples thereof include those having 1 to 15 carbon atoms, preferably 1 to 10 carbon atoms.
- the aryl group is not particularly limited, and examples thereof include those having 6 to 12 carbon atoms.
- aralkyl group is not particularly limited, and examples thereof include those having 7 to 19 carbon atoms, preferably 7 to 13 carbon atoms.
- Specific examples include benzyl group, ⁇ -methylbenzyl group, phenethyl group, naphthyl group. A methyl group etc. are mentioned.
- nitrogen-containing compound (I) examples include, but are not particularly limited to, for example, n-hexylamine, n-heptylamine, n-octylamine, n-nonylamine, n-decylamine, n-dodecylamine, cyclohexylamine.
- Mono- (cyclo) alkylamines such as: di-n-butylamine, di-n-pentylamine, di-n-hexylamine, di-n-heptylamine, di-n-octylamine, di-n-nonylamine, Di (cyclo) alkylamines such as di-n-decylamine, methyl-n-dodecylamine, di-n-dodecylmethyl, cyclohexylmethylamine, dicyclohexylamine; triethylamine, tri-n-propylamine, tri-n-butylamine , Tri-n-pentylamine, tri-n-hexylamine, tri- Tri (cyclohexylamine, tri-n-octylamine, tri-n-nonylamine, tri-n-decylamine, dimethyl-n-dodecylamine, di-n-dodecylmethylamine
- Alkylamines Alkanolamines such as monoethanolamine, diethanolamine, triethanolamine; aniline, N-methylaniline, N, N-dimethylaniline, 2-methylaniline, 3-methylaniline, 4-methylaniline, 4 -Aromatic amines such as nitroaniline, diphenylamine, triphenylamine, 1-naphthylamine and the like.
- nitrogen-containing compound (II) examples include, but are not limited to, ethylenediamine, N, N, N ′, N′-tetramethylethylenediamine, N, N, N ′, N′-tetrakis (2- Hydroxypropyl) ethylenediamine, tetramethylenediamine, hexamethylenediamine, 4,4'-diaminodiphenylmethane, 4,4'-diaminodiphenyl ether, 4,4'-diaminobenzophenone, 4,4'-diaminodiphenylamine, 2,2-bis (4-aminophenyl) propane, 2- (3-aminophenyl) -2- (4-aminophenyl) propane, 2- (4-aminophenyl) -2- (3-hydroxyphenyl) propane, 2- (4 -Aminophenyl) -2- (4-hydroxyphenyl) propane, 1,4-bis [1 (4-aminophenyl)
- the nitrogen-containing compound (III) is not particularly limited, and examples thereof include polyethyleneimine, polyallylamine, N- (2-dimethylaminoethyl) acrylamide polymer, and the like.
- amide group-containing compound examples include, but are not particularly limited to, for example, formamide, N-methylformamide, N, N-dimethylformamide, acetamide, N-methylacetamide, N, N-dimethylacetamide, propionamide, benzamide Pyrrolidone, N-methylpyrrolidone and the like.
- urea compound examples include, but are not limited to, urea, methylurea, 1,1-dimethylurea, 1,3-dimethylurea, 1,1,3,3-tetramethylurea, 1,3- Examples thereof include diphenylurea and tri-n-butylthiourea.
- nitrogen-containing heterocyclic compound examples include, but are not limited to, imidazoles such as imidazole, benzimidazole, 4-methylimidazole, 4-methyl-2-phenylimidazole, 2-phenylbenzimidazole; 2-methylpyridine, 4-methylpyridine, 2-ethylpyridine, 4-ethylpyridine, 2-phenylpyridine, 4-phenylpyridine, 2-methyl-4-phenylpyridine, nicotine, nicotinic acid, nicotinamide, quinoline Pyridines such as 8-oxyquinoline and acridine; and pyrazine, pyrazole, pyridazine, quinosaline, purine, pyrrolidine, piperidine, morpholine, 4-methylmorpholine, piperazine, 1,4-dimethylpiperazine, 1,4-diazabicyclo [ 2 2.2] octane and the like can be mentioned.
- imidazoles such as imidazole,
- radiolytic basic compound is not particularly limited, but for example, the following general formula (11-1): A sulfonium compound represented by the general formula (11-2): The iodonium compound etc. which are represented by these can be mentioned.
- R 71 , R 72 , R 73 , R 74 and R 75 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or 1 carbon atom.
- Z ⁇ represents HO ⁇ , R—COO ⁇ (wherein R represents an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 11 carbon atoms, or an alkaryl group having 7 to 12 carbon atoms) or the following general formula (11-3):
- the radiation-decomposable basic compound include, but are not limited to, triphenylsulfonium hydroxide, triphenylsulfonium acetate, triphenylsulfonium salicylate, diphenyl-4-hydroxyphenylsulfonium hydroxide, diphenyl- 4-hydroxyphenylsulfonium acetate, diphenyl-4-hydroxyphenylsulfonium salicylate, bis (4-tert-butylphenyl) iodonium hydroxide, bis (4-tert-butylphenyl) iodonium acetate, bis (4-tert-butyl) Phenyl) iodonium hydroxide, bis (4-tert-butylphenyl) iodonium acetate, bis (4-tert-butylphenyl) iodonium salicylate, -t- butylphenyl-4-hydroxyphenyl iodonium hydroxide, 4-t
- the content of the acid diffusion control agent (E) is preferably 0.001 to 49% by weight, more preferably 0.01 to 10% by weight, based on the total weight of the solid component, and 0 0.01 to 5% by weight is more preferable, and 0.01 to 3% by weight is particularly preferable.
- the radiation-sensitive composition of the present embodiment can prevent degradation of resolution, pattern shape, dimensional fidelity, and the like. Furthermore, even if the holding time from electron beam irradiation to heating after radiation irradiation becomes longer, the shape of the pattern upper layer portion does not deteriorate.
- the radiation sensitive composition of this embodiment can prevent a fall of a sensitivity, the developability of an unexposed part, etc. as content of an acid diffusion control agent (E) is 10 weight% or less.
- an acid diffusion controller (E) by using such an acid diffusion controller (E), the storage stability of the radiation-sensitive composition is improved, the resolution is improved, the holding time before irradiation, and the pulling time after irradiation. Changes in the line width of the resist pattern due to fluctuations in placement time can be suppressed, and the process stability is extremely excellent.
- a dissolution accelerator such as organic carboxylic acids or phosphorus oxo acids or derivatives thereof can be added.
- Dissolution Accelerator when the solubility of the cyclic compound in the developer is too low, the dissolution accelerator increases its solubility and moderately increases the dissolution rate of the cyclic compound during development. It can be used in the range which does not impair the effect of this invention. Although it does not specifically limit as said dissolution promoter, For example, a low molecular weight phenolic compound can be mentioned, Specifically, bisphenols, a tris (hydroxyphenyl) methane, etc. can be mentioned, for example. These dissolution promoters can be used alone or in admixture of two or more.
- the content of the dissolution accelerator is appropriately adjusted according to the type of cyclic compound to be used, but is preferably 0 to 49% by weight based on the total weight of the solid component, and 0 to 5 % By weight is more preferred, 0 to 1% by weight is more preferred, and 0% by weight is particularly preferred.
- Solubility control agent for example, has a function of controlling the solubility to moderately reduce the dissolution rate during development when the cyclic compound described above is too soluble in the developer. It is.
- a dissolution control agent those that do not chemically change in steps such as baking of resist film, irradiation with radiation, and development are preferable.
- dissolution control agent for example, aromatic hydrocarbons, such as phenanthrene, anthracene, and acenaphthene; Ketones, such as acetophenone, benzophenone, and phenyl naphthyl ketone; Examples include sulfones.
- aromatic hydrocarbons such as phenanthrene, anthracene, and acenaphthene
- Ketones such as acetophenone, benzophenone, and phenyl naphthyl ketone
- examples include sulfones.
- the content of the dissolution control agent is appropriately adjusted according to the type of cyclic compound to be used, but is preferably 0 to 49% by weight of the total weight of the solid component, and 0 to 5 % By weight is more preferred, 0 to 1% by weight is more preferred, and 0% by weight is particularly preferred.
- Sensitizer absorbs the energy of the irradiated radiation and transmits the energy to the acid generator (C), thereby increasing the amount of acid generated. It is a component that improves the apparent sensitivity.
- a sensitizer is not particularly limited, and examples thereof include benzophenones, biacetyls, pyrenes, phenothiazines, and fluorenes. These sensitizers can be used alone or in combination of two or more.
- the content of the sensitizer is appropriately adjusted according to the type of the cyclic compound to be used, but is preferably 0 to 49% by weight based on the total weight of the solid component, and 0 to 5 % By weight is more preferred, 0 to 1% by weight is more preferred, and 0% by weight is particularly preferred.
- the surfactant is a component having an action of improving the coating property and striation of the radiation-sensitive composition of the present embodiment, the developability of the resist, and the like.
- a surfactant may be anionic, cationic, nonionic or amphoteric.
- a preferred surfactant is a nonionic surfactant.
- Nonionic surfactants have better affinity with the solvent used in the production of the radiation-sensitive composition and are more effective.
- Examples of the nonionic surfactant are not particularly limited, and examples thereof include polyoxyethylene higher alkyl ethers, polyoxyethylene higher alkyl phenyl ethers, and polyethylene glycol higher fatty acid diesters.
- Ftop made by Gemco
- Megafuck made by Dainippon Ink and Chemicals
- Florard made by Sumitomo 3M
- Asahi Guard Surflon
- Pepol manufactured by Toho Chemical Industry Co., Ltd.
- KP manufactured by Shin-Etsu Chemical Co., Ltd.
- Polyflow manufactured by Kyoeisha Yushi Chemical Co., Ltd.
- the content of the surfactant is appropriately adjusted according to the kind of the cyclic compound to be used, but is preferably 0 to 49% by weight based on the total weight of the solid component, and 0 to 5 % By weight is more preferred, 0 to 1% by weight is more preferred, and 0% by weight is particularly preferred.
- Organic carboxylic acid or phosphorous oxo acid or derivative thereof is further used as an optional component for the purpose of preventing sensitivity deterioration or improving the resist pattern shape, retention stability, etc.
- Organic carboxylic acids or phosphorus oxo acids or their derivatives can be included. In addition, it can use together with an acid diffusion control agent, and may be used independently. Although it does not specifically limit as organic carboxylic acid, For example, malonic acid, a citric acid, malic acid, a succinic acid, a benzoic acid, a salicylic acid etc. are suitable.
- Phosphorus oxoacids or derivatives thereof are not particularly limited.
- phosphoric acid, phosphoric acid di-n-butyl ester, phosphoric acid diphenyl ester and other phosphoric acid or derivatives thereof such as phosphonic acid, phosphonic acid Phosphonic acid such as dimethyl ester, phosphonic acid di-n-butyl ester, phenylphosphonic acid, phosphonic acid diphenyl ester, phosphonic acid dibenzyl ester or derivatives thereof, phosphinic acid, phosphinic acid such as phenylphosphinic acid, and the like And derivatives thereof such as phosphonic acid are particularly preferred.
- Organic carboxylic acids or phosphorus oxo acids or derivatives thereof may be used alone or in combination of two or more.
- the content of the organic carboxylic acid or phosphorus oxo acid or derivative thereof is appropriately adjusted according to the type of cyclic compound to be used, but 0 to 49 of the total weight of the solid component. % By weight is preferable, 0 to 5% by weight is more preferable, 0 to 1% by weight is further preferable, and 0% by weight is particularly preferable.
- the radiation-sensitive composition of this embodiment includes the present invention. As long as it does not impede the purpose, one or more additives other than the above-mentioned dissolution control agent, sensitizer, and surfactant can be contained. Such additives are not particularly limited, and examples thereof include dyes, pigments, and adhesion aids.
- the radiation-sensitive composition of this embodiment is preferable to contain, for example, a dye or a pigment because it can visualize the latent image in the exposed area and reduce the influence of halation during exposure.
- the radiation-sensitive composition of the present embodiment contains an adhesion assistant because adhesion with the substrate can be improved.
- examples of other additives include an antihalation agent, a storage stabilizer, an antifoaming agent, a shape improving agent, and the like, specifically 4-hydroxy-4′-methylchalcone.
- the total content of the optional component (F) is preferably 0 to 49% by weight, more preferably 0 to 5% by weight, and more preferably 0 to 1% by weight based on the total weight of the solid component. More preferred is 0% by weight.
- the content ratio of each component cyclic compound / acid generator (C) / acid crosslinking agent (G) / acid diffusion controller (E) / optional component (F)) %
- solid component preferably 50-99.4 / 0.001-49 / 0.5-49 / 0.001-49 / 0-49, more preferably 55-90 / 1-40 / 0 5 to 40 / 0.01 to 10/0 to 5, more preferably 60 to 80/3 to 30/1 to 30 / 0.01 to 5/0 to 1, particularly preferably 60 to 70/10 to 25 / 2 to 20 / 0.01 to 3/0.
- the content ratio of each component is selected from each range so that the sum is 100% by weight.
- the radiation sensitive composition of this embodiment is excellent in performance, such as sensitivity, resolution, developability, etc., when the content ratio of each of the above components is used.
- the radiation-sensitive composition of the present embodiment is usually obtained by dissolving each solid component in a solvent at the time of use to obtain a uniform solution, and then filtering with a filter having a pore size of about 0.2 ⁇ m as necessary. Prepared.
- the solvent used for the preparation of the radiation-sensitive composition of the present embodiment is not particularly limited, and examples thereof include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol mono-n-propyl ether acetate, Ethylene glycol monoalkyl ether acetates such as ethylene glycol mono-n-butyl ether acetate; ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether and ethylene glycol monoethyl ether; propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, Propylene glycol mono-n-propyl ether acetate, propylene glycol mono-n-butyl Propylene glycol monoalkyl ether acetates such as ether acetate; Propylene glycol monoalkyl ethers such as propylene glycol monomethyl ether and propylene glycol monoethyl
- the radiation-sensitive composition of the present embodiment can contain a resin as long as the object of the present invention is not impaired.
- the resin is not particularly limited, and includes, for example, novolac resin, polyvinylphenols, polyacrylic acid, polyvinyl alcohol, styrene-maleic anhydride resin, and acrylic acid, vinyl alcohol, or vinylphenol as monomer units. Examples thereof include polymers and derivatives thereof.
- the content of the resin is appropriately adjusted according to the type of the above-described cyclic compound to be used, but is preferably 30 parts by weight or less per 100 parts by weight of the cyclic compound.
- the amount is preferably 10 parts by weight or less, more preferably 5 parts by weight or less, and particularly preferably 0 part by weight.
- the resist pattern forming method of the present embodiment includes a step of coating the radiation sensitive composition on a substrate to form a resist film, a step of exposing the resist film, and developing the exposed resist film. Forming a resist pattern.
- the resist pattern of this embodiment can also be formed as an upper layer resist in a multilayer process.
- a resist film is formed by applying the radiation-sensitive composition on a conventionally known substrate by a coating means such as spin coating, cast coating, roll coating or the like.
- the conventionally known substrate is not particularly limited, and examples thereof include a substrate for electronic parts and a substrate on which a predetermined wiring pattern is formed. More specifically, although not particularly limited, for example, a silicon substrate, a metal substrate such as copper, chromium, iron, and aluminum, a glass substrate, and the like can be given.
- the material for the wiring pattern is not particularly limited, and examples thereof include copper, aluminum, nickel, and gold. If necessary, an inorganic and / or organic film may be provided on the substrate.
- an inorganic antireflection film inorganic BARC
- organic film is not particularly limited, and examples thereof include an organic antireflection film (organic BARC). Surface treatment with hexamethylene disilazane or the like may be performed.
- the coated substrate is heated as necessary.
- the heating temperature varies depending on the composition of the radiation sensitive composition, but is preferably 20 to 250 ° C, more preferably 20 to 150 ° C.
- the adhesion of the radiation-sensitive composition (resist) to the substrate may be improved, which is preferable.
- the resist film is exposed to a desired pattern with any radiation selected from the group consisting of visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet light (EUV), X-ray, and ion beam.
- the exposure conditions and the like are appropriately selected according to the composition of the radiation sensitive composition.
- the heating temperature varies depending on the composition of the radiation sensitive composition, but is preferably 20 to 250 ° C, more preferably 20 to 150 ° C.
- a predetermined resist pattern is formed by developing the exposed resist film with a developer (development process).
- a developer it is preferable to select a solvent having a solubility parameter (SP value) close to that of the above-mentioned cyclic compound to be used.
- SP value solubility parameter
- ketone solvents, ester solvents, alcohol solvents, amide solvents, ethers A polar solvent such as a solvent, a hydrocarbon solvent, or an alkaline aqueous solution can be used.
- the ketone solvent is not particularly limited.
- the ester solvent is not particularly limited.
- the alcohol solvent is not particularly limited.
- the ether solvent is not particularly limited, and examples thereof include dioxane, tetrahydrofuran and the like in addition to the glycol ether solvent.
- the amide solvent is not particularly limited.
- N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, hexamethylphosphoric triamide, 1,3-dimethyl-2- Imidazolidinone can be used.
- the hydrocarbon solvent is not particularly limited, and examples thereof include aromatic hydrocarbon solvents such as toluene and xylene, and aliphatic hydrocarbon solvents such as pentane, hexane, octane and decane.
- the water content of the developer as a whole is less than 70% by mass, preferably less than 50% by mass, and more preferably less than 30% by mass.
- it is more preferably less than 10% by mass, and it is particularly preferable that it contains substantially no water.
- the content of the organic solvent with respect to the developer is 30% by mass to 100% by mass, preferably 50% by mass to 100% by mass, and preferably 70% by mass to 100% by mass with respect to the total amount of the developer. More preferably, it is 90 mass% or less, More preferably, it is 90 mass% or more and 100 mass% or less, It is especially preferable that it is 95 mass% or more and 100 mass% or less.
- the alkaline aqueous solution is not particularly limited, and examples thereof include mono-, di- or trialkylamines, mono-, di- or trialkanolamines, heterocyclic amines, tetramethylammonium hydroxide (TMAH), choline. And alkaline compounds such as
- a developing solution containing at least one solvent selected from a ketone solvent, an ester solvent, an alcohol solvent, an amide solvent, and an ether solvent is used. It is preferable for improving the resist performance.
- the vapor pressure of the developer is preferably 5 kPa or less, more preferably 3 kPa or less, and particularly preferably 2 kPa or less at 20 ° C.
- Specific examples of the developer having a vapor pressure of 5 kPa or less at 20 ° C. are not particularly limited.
- 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, 4-heptanone, 2- Ketone solvents such as hexanone, diisobutyl ketone, cyclohexanone, methylcyclohexanone, phenylacetone, methylisobutylketone, butyl acetate, amyl acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether Acetate, ethyl-3-ethoxypropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, butyl formate, propionic acid Ester solvents such as ethyl lactate, but
- the developer having a vapor pressure of 2 kPa or less which is a particularly preferable range, are not particularly limited.
- 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, 4-heptanone, 2 -Ketone solvents such as hexanone, diisobutyl ketone, cyclohexanone, methylcyclohexanone, phenylacetone, butyl acetate, amyl acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, ethyl -3-Ethoxypropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, ethyl lactate, butyl lactate, propyl lactate, etc.
- Steal solvent n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, n-hexyl alcohol, 4-methyl-2-pentanol, n-heptyl alcohol, n-octyl alcohol, n-decanol, etc.
- Alcohol solvents such as ethylene glycol, diethylene glycol, triethylene glycol, etc., ethylene glycol monomethyl ether, propylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monoethyl ether, diethylene glycol monomethyl ether, triethylene glycol mono Glycol ether solvents such as ethyl ether and methoxymethylbutanol, N-methyl-2-pyrrolidone, N, N Dimethylacetamide, N, N-dimethylformamide amide solvents, aromatic hydrocarbon solvents such as xylene, octane, aliphatic hydrocarbon solvents decane.
- An appropriate amount of a surfactant can be added to the developer as necessary.
- the surfactant is not particularly limited.
- ionic or nonionic fluorine-based and / or silicon-based surfactants can be used.
- fluorine and / or silicon surfactants include, for example, JP-A No. 62-36663, JP-A No. 61-226746, JP-A No. 61-226745, JP-A No. 62-170950, JP-A-63-34540, JP-A-7-230165, JP-A-8-62834, JP-A-9-54432, JP-A-9-5988, US Pat. No. 5,405,720, The surfactants described in US Pat. Nos.
- Nonionic surfactant it is a nonionic surfactant.
- a nonionic surfactant it does not specifically limit as a nonionic surfactant,
- the amount of the surfactant used is usually 0.001 to 5% by mass, preferably 0.005 to 2% by mass, and more preferably 0.01 to 0.5% by mass with respect to the total amount of the developer.
- the development method is not particularly limited.
- the substrate is immersed in a tank filled with a developer for a certain period of time (dip method), and the developer is raised on the surface of the substrate by surface tension and left stationary for a certain period of time.
- Development method (paddle method), spraying developer solution onto the substrate surface (spray method), developing solution is continuously applied to the substrate rotating at a constant speed while scanning the developer application nozzle at a constant speed.
- a method (dynamic dispensing method) or the like can be applied.
- the time for developing the pattern is not particularly limited, but is preferably 10 seconds to 90 seconds.
- a step of stopping the development may be performed while substituting with another solvent.
- a cleaning step (rinsing step) using a rinsing solution containing an organic solvent is included after the development step.
- the rinsing solution used in the rinsing step after the development step is not particularly limited as long as the resist pattern cured by crosslinking is not dissolved, and a solution or water containing a general organic solvent can be used.
- the rinsing liquid is not particularly limited, and includes, for example, at least one organic solvent selected from hydrocarbon solvents, ketone solvents, ester solvents, alcohol solvents, amide solvents, and ether solvents. It is preferable to use a rinse solution. More preferably, after the development step, a washing step is performed using a rinse solution containing at least one organic solvent selected from the group consisting of ketone solvents, ester solvents, alcohol solvents, and amide solvents. .
- a washing step using a rinse solution containing an alcohol solvent or an ester solvent is performed. Even more preferably, after the development step, a step of washing with a rinsing liquid containing a monohydric alcohol is performed. Particularly preferably, after the development step, a washing step is performed using a rinse solution containing a monohydric alcohol having 5 or more carbon atoms.
- the time for rinsing the pattern is not particularly limited, but is preferably 10 seconds to 90 seconds.
- the monohydric alcohol used in the rinsing step after the development step is not particularly limited, and examples thereof include linear, branched, and cyclic monohydric alcohols. Specific examples include 1-butanol, 2-butanol, 3-methyl-1-butanol, tert-butyl alcohol, 1-pentanol, 2-pentanol, 1-hexanol, 4-methyl-2-pentanol, 1-heptanol, 1-octanol, 2- Hexanol, cyclopentanol, 2-heptanol, 2-octanol, 3-hexanol, 3-heptanol, 3-octanol, 4-octanol and the like can be used, and particularly preferable monohydric alcohols having 5 or more carbon atoms include Without limitation, for example, 1-hexanol, 2-hexanol, 4-methyl-2-pen Nord, 1-pentanol, 3-methyl-1-butanol and the like can be
- a plurality of the above components may be mixed, or may be used by mixing with an organic solvent other than the above.
- the water content in the rinse liquid is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 3% by mass or less. By setting the water content in the rinse liquid to 10% by mass or less, better development characteristics can be obtained.
- the vapor pressure of the rinsing liquid used after the development step is preferably 0.05 kPa or more and 5 kPa or less, more preferably 0.1 kPa or more and 5 kPa or less, and further preferably 0.12 kPa or more and 3 kPa or less at 20 ° C.
- An appropriate amount of a surfactant can be added to the rinse solution.
- the wafer that has been subjected to the developing step is cleaned using a rinsing solution containing the organic solvent.
- the method of the cleaning treatment is not particularly limited. For example, a method of continuously applying a rinse liquid onto a substrate rotating at a constant speed (rotary coating method), or immersing the substrate in a tank filled with the rinse liquid for a certain period of time. A method (dip method), a method of spraying a rinsing liquid onto the substrate surface (spray method), etc. can be applied.
- a cleaning process is performed by a spin coating method, and after cleaning, the substrate is rotated at a speed of 2000 rpm to 4000 rpm. It is preferable to rotate and remove the rinse liquid from the substrate.
- the pattern wiring board is obtained by etching.
- the etching method include known methods such as dry etching using plasma gas and wet etching using an alkali solution, a cupric chloride solution, a ferric chloride solution, or the like.
- plating after forming the resist pattern.
- plating method for example, there exist copper plating, solder plating, nickel plating, gold plating, etc.
- the residual resist pattern after etching can be stripped with an organic solvent.
- organic solvent For example, PGMEA (propylene glycol monomethyl ether acetate), PGME (propylene glycol monomethyl ether), EL (ethyl lactate) etc. are mentioned.
- peeling method For example, the immersion method, a spray system, etc. are mentioned.
- the wiring board on which the resist pattern is formed may be a multilayer wiring board or may have a small diameter through hole.
- the wiring board can also be formed by a method of depositing a metal in a vacuum after forming a resist pattern and then dissolving the resist pattern with a solution, that is, a lift-off method.
- this compound showed a molecular weight 960 of the target compound represented by the following formula (CR-1A).
- the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 1.1 to 1.2 (m, 24H), 2.6 to 2.7 ( m, 4H), 5.5 (s, 4H), 6.0 to 6.8 (m, 24H), and 8.4 to 8.5 (d, 8H).
- the compound obtained from these results was identified as the target compound (hereinafter also referred to as “CR-1A”) represented by the following formula (CR-1A) (yield 95%).
- Synthesis Example 2 Synthesis of CR-2A (Cyclic Compound (A)) Synthesis was performed in the same manner as in Synthesis Example 1 except that 4-isopropylbenzaldehyde was replaced with 4-cyclohexylbenzaldehyde (46.0 g, 0.2 mol), and 50 g To give a compound. As a result of analysis by LC-MS, this compound showed a molecular weight 1121 of the target compound represented by the following formula (CR-2A).
- the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 0.8 to 1.9 (m, 44H), 5.5 to 5.6 ( d, 4H), 6.0 to 6.8 (m, 24H), and 8.4 to 8.5 (m, 8H).
- the compound obtained from these results was identified as the target compound represented by the following formula (CR-2A) (hereinafter also referred to as “CR-2A”) (yield 91%).
- the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 1.1 to 1.2 (m, 24H), 2.6 to 2.7 (m, 4H), 5.5 (m, 4H), 5.7 (m, 4H), 6.0 to 6.8 (m, 32H), and 8.4 to 8.5 (m, 4H).
- the compound obtained from these results was converted to a compound represented by the following formula (CR-1) in which 50 mol% of the hydrogen atoms of the phenolic hydroxyl group of CR-1A were substituted with an acryloyl group (hereinafter referred to as “CR-1”). Also identified).
- Synthesis Example 2 Synthesis of CR-2 (Cyclic Compound) Synthesis was performed in the same manner as in Synthesis Example 1 except that CR-1A was replaced with CR-2A (11.2 g, 10 mmol). Obtained. Further, the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 0.8 to 1.9 (m, 44H), 5.5 to 5.6 ( d, 4H), 5.7 (s, 4H), 6.0 to 6.8 (m, 32H), and 8.4 to 8.5 (m, 4H).
- CR-2 a compound represented by the following formula (CR-2) in which 50 mol% of the hydrogen atoms of the phenolic hydroxyl group of CR-2A were substituted with an acryloyl group (hereinafter referred to as “CR-2”). Also identified).
- Synthesis Example 3 Synthesis of CR-3 (Cyclic Compound) Synthesis was performed in the same manner as in Synthesis Example 1 except that the amount of acryloyl chloride was changed from 3.6 g (40 mmol) to 10.8 g (120 mmol). 0 g of compound was obtained. As a result of analysis by LC-MS, this compound showed a molecular weight of 1393 of the target compound represented by the following formula (CR-3).
- the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 1.1 to 1.2 (m, 24H), 2.6 to 2.7 ( m, 4H), 5.5 (s, 4H), 5.7 (s, 8H), and 6.0 to 6.8 (m, 40H).
- the compound obtained from these results was converted to a compound represented by the following formula (CR-3) (hereinafter referred to as “CR-3”) in which 100 mol% of the hydrogen atom of the phenolic hydroxyl group of CR-1A was substituted with an acryloyl group. Also identified).
- Synthesis Example 4 Synthesis of CR-4 (Cyclic Compound) Synthesis was performed in the same manner as in Synthesis Example 2 except that the amount of acryloyl chloride was changed from 3.6 g (40 mmol) to 10.8 g (120 mmol). 4 g of compound was obtained. As a result of analysis by LC-MS, this compound showed a molecular weight 1553 of the target compound represented by the following formula (CR-4).
- the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 0.8 to 1.9 (m, 44H), 5.5 to 5.6 ( d, 4H), 5.7 (s, 8H), and 6.0 to 6.8 (m, 40H).
- the compound obtained from these results was converted to a compound represented by the following formula (CR-4) (hereinafter referred to as “CR-4”) in which 100 mol% of the hydrogen atom of the phenolic hydroxyl group of CR-2A was substituted with an acryloyl group. Also identified).
- Synthesis Example 5 Synthesis of CR-5 (Cyclic Compound) Synthesis was performed in the same manner as in Synthesis Example 3 except that 10.8 g (120 mmol) of acryloyl chloride was replaced with 12.48 g (120 mmol) of methacryloyl chloride. To give a compound. As a result of analysis by LC-MS, this compound showed a molecular weight 1521 of the target compound represented by the following formula (CR-5). Further, the chemical shift value ( ⁇ ppm, TMS standard) of 1 H-NMR in the heavy dimethyl sulfoxide solvent of the obtained compound is 1.1 to 1.2 (m, 24H), 1.9 (s, 12H).
- CR-5 a compound represented by the following formula (hereinafter referred to as “CR-5”) in which 100 mol% of the hydrogen atom of the phenolic hydroxyl group of CR-1A was substituted with a methacryloyl group. Also identified).
- Acid generator (C) P-1 Triphenylbenzenesulfonium trifluoromethanesulfonate (Midori Chemical Co., Ltd.) Acid crosslinking agent (G) C-1: Nikarac MW-100LM (Sanwa Chemical Co., Ltd.) Acid diffusion controller (E) Q-1: Trioctylamine (Tokyo Chemical Industry Co., Ltd.) Solvent S-1: Propylene glycol monomethyl ether (Tokyo Chemical Industry Co., Ltd.)
- the patterning test was done as follows using the prepared radiation sensitive composition.
- the prepared radiation sensitive composition was spin-coated on a clean silicon wafer and then pre-exposure baked (PB) in an oven at 110 ° C. to form a resist film having a thickness of 60 nm.
- the resist film was irradiated with an electron beam with a 1: 1 line and space setting at intervals of 50 nm, 40 nm, and 30 nm using an electron beam drawing apparatus (ELS-7500, manufactured by Elionix Co., Ltd.). After irradiation, the resist film formed from the radiation-sensitive compositions prepared in Examples 7 and 8 was heated at 110 ° C.
- the obtained resist pattern was observed with a scanning electron microscope (S-4800, manufactured by Hitachi High-Technology Corporation).
- the resolution of the pattern was the minimum line width of the formed pattern.
- the pattern shape was good if it was rectangular.
- the line edge roughness was good when the pattern irregularities were less than 5 nm. Further to the dose at that time a ( ⁇ C / cm 2) and sensitivity, was considered good than 150 ⁇ C / cm 2.
- the radiation sensitive compositions of Comparative Examples 3 and 4 were able to obtain a good resist pattern with a resolution of 40 nm, but could not obtain a good resist pattern with a resolution of 30 nm.
- the composition containing the compound of the present embodiment (for example, CR-3 and CR-4) is more effective than the composition containing the corresponding comparative compound (for example, CR-1A and CR-2A). It was found that a resist pattern with high sensitivity, low roughness, and good shape can be formed. As long as the requirements of the present embodiment described above are satisfied, compounds other than those described in the examples also show the same effect.
- the present invention relates to a cyclic compound represented by a specific chemical structural formula useful as an acid amplification type non-polymer resist material, a radiation sensitive composition containing the same, and a resist pattern forming method using the radiation sensitive composition. Preferably used.
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Abstract
Description
1. 分子量500~5000の、式(1)で示される環状化合物。
前記R0の少なくともひとつが(メタ)アクリロイル基を含む一価の基である。)
2. 前記式(1)で示される環状化合物が、式(2)で示される前項1に記載の環状化合物。
R2は、それぞれ独立して、水素原子、シアノ基、ニトロ基、ハロゲン原子、置換若しくは無置換の炭素数1~20の直鎖状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の分岐状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の環状脂肪族炭化水素基、置換若しくは無置換の炭素数6~20のアリール基、置換若しくは無置換の炭素数7~30のアラルキル基、置換若しくは無置換の炭素数1~20のアルコキシ基、置換若しくは無置換の炭素数2~20のアルケニル基、置換若しくは無置換の炭素数1~20のアシル基、置換若しくは無置換の炭素数2~20のアルコキシカルボニル基、置換若しくは無置換の炭素数1~20のアルキロイルオキシ基、置換若しくは無置換の炭素数7~30のアリーロイルオキシ基又は置換若しくは無置換の炭素数1~20のアルキルシリル基であり、
R’は、それぞれ独立して、水素原子、置換若しくは無置換の炭素数1~20の直鎖状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の分岐状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の環状脂肪族炭化水素基又は下記式(3)
前記R1の少なくともひとつが、(メタ)アクリロイル基である。)
3. 前記式(2)で示される環状化合物が、式(4)で示される前項2に記載の環状化合物。
R4は、それぞれ独立して、シアノ基、ニトロ基、置換若しくは無置換の複素環基、ハロゲン原子、置換若しくは無置換の炭素数1~20の直鎖状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の分岐状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の環状脂肪族炭化水素基、置換若しくは無置換の炭素数6~20のアリール基、置換若しくは無置換の炭素数1~20のアルコキシ基又は置換若しくは無置換の炭素数1~20のアルキルシリル基であり、
pは0~5の整数であり、
前記R1の少なくともひとつが、(メタ)アクリロイル基である。)
4. 前記式(4)で示される環状化合物が、式(5)で示される前項3に記載の環状化合物。
pは0~5の整数であり、
R5は(メタ)アクリロイル基である。)
5. 前項1~4のいずれか1項に記載の環状化合物を製造する方法であって、
1種以上のアルデヒド性化合物(A1)と1種以上のフェノール性化合物(A2)とを縮合反応させて環状化合物(A)を得る工程と、
該環状化合物(A)と1種以上の(メタ)アクリロイルハライドとを脱ハロゲン化水素反応させる工程とを備える、環状化合物の製造方法。
6. 前記アルデヒド性化合物(A1)が、1~4個のホルミル基を有し、かつ炭素数1~59であり、
前記フェノール性化合物(A2)が、1~3個のフェノール性水酸基を有し、かつ炭素数6~15である、前項5に記載の環状化合物の製造方法。
7. 前項1~4のいずれか1項に記載の環状化合物を含む固形成分及び溶媒を含有する、感放射線性組成物。
8. 前記固形成分の含有量が1~80重量%である、前項7に記載の感放射線性組成物。
9. 前記固形成分の全重量に占める前記環状化合物の割合が50~99.999重量%である、前項7又は8に記載の感放射線性組成物。
10. 可視光線、紫外線、エキシマレーザー、電子線、極端紫外線(EUV)、X線及びイオンビームからなる群から選ばれるいずれかの放射線の照射により直接的又は間接的に酸を発生する酸発生剤(C)をさらに含む、前項7~9のいずれか1項に記載の感放射線性組成物。
11. 酸架橋剤(G)をさらに含む、前項7~10のいずれか1項に記載の感放射線性組成物。
12. 酸拡散制御剤(E)をさらに含む、前項7~11のいずれか1項に記載の感放射線性組成物。
13. 前記固形成分が、環状化合物50~99.4重量%、酸発生剤(C)0.001~49重量%、酸架橋剤(G)0.5~49重量%、及び酸拡散制御剤(E)0.001~49重量%を含有する、前項7~12のいずれか1項に記載の感放射線性組成物。
14. スピンコートによりアモルファス膜を形成する、前項7~13のいずれか1項に記載の感放射線性組成物。
15. 前記アモルファス膜の23℃における現像液に対する溶解速度が10Å/sec以上である、前項14に記載の感放射線性組成物。
16. KrFエキシマレーザー、極端紫外線、電子線若しくはX線を照射した後の前記アモルファス膜、又は20~250℃で加熱した後の前記アモルファス膜の、現像液に対する溶解速度が5Å/sec以下である、前項14又は15に記載の感放射線性組成物。
17. 前項7~16のいずれか1項に記載の感放射線性組成物を、基板上に塗布してレジスト膜を形成する工程と、
該レジスト膜を露光する工程と、
該露光したレジスト膜を現像する工程とを備える、レジストパターン形成方法。
本実施形態の環状化合物は、分子量500~5000の、下記式(1)で示される環状化合物である。本実施形態の環状化合物は、レジスト材料として有用である。
本実施形態による感放射線性組成物は、前記した環状化合物を含む固形成分と、溶媒とを含有する。また、本実施形態の感放射線性組成物は、その固形成分が1~80重量%であることが好ましく、さらに、該環状化合物の固形成分全重量に占める割合が50~99.999重量%であることがより好ましい。
上記酸発生剤(C)は、単独で又は2種以上を使用することができる。
溶解促進剤は、例えば、上述の環状化合物の現像液に対する溶解性が低すぎる場合に、その溶解性を高めて、現像時の環状化合物の溶解速度を適度に増大させる作用を有する成分であり、本発明の効果を損なわない範囲で使用することができる。前記溶解促進剤としては、特に限定されないが、例えば、低分子量のフェノール性化合物を挙げることができ、具体的には、例えば、ビスフェノール類、トリス(ヒドロキシフェニル)メタン等を挙げることができる。これらの溶解促進剤は、単独で又は2種以上を混合して使用することができる。本実施形態の感放射線性組成物において、溶解促進剤の含有量は、使用する環状化合物の種類に応じて適宜調節されるが、固形成分全重量の0~49重量%が好ましく、0~5重量%がより好ましく、0~1重量%がさらに好ましく、0重量%が特に好ましい。
溶解制御剤は、例えば、上述の環状化合物が現像液に対する溶解性が高すぎる場合に、その溶解性を制御して現像時の溶解速度を適度に減少させる作用を有する成分である。このような溶解制御剤としては、レジスト被膜の焼成、放射線照射、現像等の工程において化学変化しないものが好ましい。
増感剤は、照射された放射線のエネルギーを吸収して、そのエネルギーを酸発生剤(C)に伝達し、それにより酸の生成量を増加する作用を有し、レジストの見掛けの感度を向上させる成分である。このような増感剤としては、特に限定されないが、例えば、ベンゾフェノン類、ビアセチル類、ピレン類、フェノチアジン類、フルオレン類等を挙げることができる。これらの増感剤は、単独で又は2種以上を使用することができる。本実施形態の感放射線性組成物において、増感剤の含有量は、使用する環状化合物の種類に応じて適宜調節されるが、固形成分全重量の0~49重量%が好ましく、0~5重量%がより好ましく、0~1重量%がさらに好ましく、0重量%が特に好ましい。
界面活性剤は、本実施形態の感放射線性組成物の塗布性やストリエーション、レジストの現像性等を改良する作用を有する成分である。このような界面活性剤は、アニオン系、カチオン系、ノニオン系あるいは両性のいずれでもよい。好ましい界面活性剤はノニオン系界面活性剤である。ノニオン系界面活性剤は、感放射線性組成物の製造に用いる溶媒との親和性がよく、より効果がある。ノニオン系界面活性剤の例としては、特に限定されないが、例えば、ポリオキシエチレン高級アルキルエーテル類、ポリオキシエチレン高級アルキルフェニルエーテル類、ポリエチレングリコールの高級脂肪酸ジエステル類等が挙げられる。市販品としては、特に限定されないが、例えば、以下商品名で、エフトップ(ジェムコ社製)、メガファック(大日本インキ化学工業社製)、フロラード(住友スリーエム社製)、アサヒガード、サーフロン(以上、旭硝子社製)、ペポール(東邦化学工業社製)、KP(信越化学工業社製)、ポリフロー(共栄社油脂化学工業社製)等を挙げることができる。本実施形態の感放射線性組成物において、界面活性剤の含有量は、使用する環状化合物の種類に応じて適宜調節されるが、固形成分全重量の0~49重量%が好ましく、0~5重量%がより好ましく、0~1重量%がさらに好ましく、0重量%が特に好ましい。
本実施形態の感放射線性組成物は、感度劣化防止又はレジストパターン形状、引き置き安定性等の向上の目的で、さらに任意の成分として、有機カルボン酸又はリンのオキソ酸若しくはその誘導体を含有させることができる。なお、酸拡散制御剤と併用することもできるし、単独で用いてもよい。有機カルボン酸としては、特に限定されないが、例えば、マロン酸、クエン酸、リンゴ酸、コハク酸、安息香酸、サリチル酸などが好適である。リンのオキソ酸若しくはその誘導体としては、特に限定されないが、例えば、リン酸、リン酸ジ-n-ブチルエステル、リン酸ジフェニルエステルなどのリン酸又はそれらのエステルなどの誘導体、ホスホン酸、ホスホン酸ジメチルエステル、ホスホン酸ジ-n-ブチルエステル、フェニルホスホン酸、ホスホン酸ジフェニルエステル、ホスホン酸ジベンジルエステルなどのホスホン酸又はそれらのエステルなどの誘導体、ホスフィン酸、フェニルホスフィン酸などのホスフィン酸及びそれらのエステルなどの誘導体が挙げられ、これらの中で特にホスホン酸が好ましい。
更に、本実施形態の感放射線性組成物には、本発明の目的を阻害しない範囲で、必要に応じて、上記溶解制御剤、増感剤、及び界面活性剤以外の添加剤を1種又は2種以上含有することができる。そのような添加剤としては、特に限定されないが、例えば、染料、顔料、及び接着助剤等が挙げられる。本実施形態の感放射線性組成物は、例えば、染料又は顔料を含有させると、露光部の潜像を可視化させて、露光時のハレーションの影響を緩和できるので好ましい。また、本実施形態の感放射線性組成物は、接着助剤を含有させると、基板との接着性を改善することができるので好ましい。更に、他の添加剤としては、ハレーション防止剤、保存安定剤、消泡剤、形状改良剤等、具体的には4-ヒドロキシ-4’-メチルカルコン等を挙げることができる。
本実施形態のレジストパターンの形成方法は、上記の感放射線性組成物を、基板上に塗布してレジスト膜を形成する工程、前記レジスト膜を露光する工程及び前記露光したレジスト膜を現像してレジストパターンを形成する工程を含む。本実施形態のレジストパターンは多層プロセスにおける上層レジストとして形成することもできる。
十分乾燥し、窒素置換した、滴下漏斗、ジム・ロート氏冷却管、温度計、攪拌翼を設置した四つ口フラスコ(1000mL)において、窒素気流下で、関東化学社製レゾルシノール(22g、0.2mol)と、4-イソプロピルベンズアルデヒド(29.6g,0.2mol)と、脱水エタノール(200mL)とを投入し、エタノール溶液を調製した。このエタノール溶液を攪拌しながらマントルヒーターで85℃まで加熱した。次いでこのエタノール溶液中に、濃塩酸(35%)75mLを、滴下漏斗により30分かけて滴下した後、引き続き85℃で3時間攪拌して反応を行った。反応終了後、得られた反応液を放冷し、室温に到達させた後、氷浴で冷却した。この反応液を1時間静置後、淡黄色粗結晶が生成した。生成した淡黄色粗結晶を濾別して粗結晶を得た。得られた粗結晶をメタノール500mLで2回洗浄し、濾別、真空乾燥させることにより45.6gの化合物を得た。この化合物は、LC-MS分析した結果、下記式(CR-1A)で表される目的化合物の分子量960を示した。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は1.1~1.2(m,24H)、2.6~2.7(m,4H)、5.5(s,4H)、6.0~6.8(m,24H)、8.4~8.5(d,8H)であった。これらの結果から得られた化合物を下記式(CR-1A)で表される目的化合物(以下「CR-1A」とも記す。)と同定した(収率95%)。
4-イソプロピルベンズアルデヒドを4-シクロヘキシルベンズアルデヒド(46.0g,0.2mol)に代えた以外は合成例1と同様に合成し、50gの化合物を得た。この化合物は、LC-MSで分析した結果、下記式(CR-2A)で表される目的化合物の分子量1121を示した。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は0.8~1.9(m,44H)、5.5~5.6(d,4H)、6.0~6.8(m,24H)、8.4~8.5(m,8H)であった。これらの結果から得られた化合物を下記式(CR-2A)で表される目的化合物(以下「CR-2A」とも記す。)と同定した(収率91%)。
十分乾燥し、窒素置換した、滴下漏斗、ジム・ロート氏冷却管、温度計、攪拌翼を設置した四つ口フラスコ(1000mL)において、窒素気流下、氷浴で冷却した、合成例1で合成したCR-1A9.6g(10mmol)、トリエチルアミン4g(40mmol)及び300mLのTHFからなる溶液に、アクリロイルクロライド3.6g(40mmol)を滴下し、1時間室温で撹拌して反応を行った。反応終了後、得られた反応液を冷水1000mlに加え、析出した固体を濾別した。得られた固体を、カラムクロマトで精製し、10.6gの化合物を得た。
CR-1AをCR-2A(11.2g,10mmol)に代えた以外は合成実施例1と同様に合成し、11.2gの化合物を得た。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は0.8~1.9(m,44H)、5.5~5.6(d,4H)、5.7(s,4H)、6.0~6.8(m,32H)、8.4~8.5(m,4H)であった。これらの結果から得られた化合物を、CR-2Aのフェノール性水酸基の水素原子の50mol%がアクリロイル基で置換された、下記式(CR-2)で表される化合物(以下「CR-2」とも記す。)と同定した。
アクリロイルクロライドの量を3.6g(40mmol)から10.8g(120mmol)に代えた以外は合成実施例1と同様に合成し、11.0gの化合物を得た。この化合物は、LC-MSで分析した結果、下記式(CR-3)で表される目的化合物の分子量1393を示した。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は1.1~1.2(m,24H)、2.6~2.7(m,4H)、5.5(s,4H)、5.7(s,8H)、6.0~6.8(m,40H)であった。これらの結果から得られた化合物を、CR-1Aのフェノール性水酸基の水素原子の100mol%がアクリロイル基で置換された、下記式(CR-3)で表される化合物(以下「CR-3」とも記す。)と同定した。
アクリロイルクロライドの量を3.6g(40mmol)から10.8g(120mmol)に代えた以外は合成実施例2と同様に合成し、11.4gの化合物を得た。この化合物は、LC-MSで分析した結果、下記式(CR-4)で表される目的化合物の分子量1553を示した。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は0.8~1.9(m,44H)、5.5~5.6(d,4H)、5.7(s,8H)、6.0~6.8(m,40H)であった。これらの結果から得られた化合物を、CR-2Aのフェノール性水酸基の水素原子の100mol%がアクリロイル基で置換された、下記式(CR-4)で表される化合物(以下「CR-4」とも記す。)と同定した。
アクリロイルクロライド10.8g(120mmol)をメタクリロイルクロライド12.48g(120mmol)に代えた以外は合成実施例3と同様に合成し、11.0gの化合物を得た。この化合物は、LC-MSで分析した結果、下記式(CR-5)で表される目的化合物の分子量1521を示した。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は1.1~1.2(m,24H)、1.9(s,12H)、2.6~2.7(m,4H)、5.5(s,4H)、5.7(s,8H)、6.0~6.8(m,32H)であった。これらの結果から得られた化合物を、CR-1Aのフェノール性水酸基の水素原子の100mol%がメタクリロイル基で置換された、下記式(CR-5)で表される化合物(以下「CR-5」とも記す。)と同定した。
アクリロイルクロライド10.8g(120mmol)をメタクリロイルクロライド12.48g(120mmol)に代えた以外は合成実施例4と同様に合成し、11.0gの化合物を得た。この化合物は、LC-MSで分析した結果、下記式(CR-6)で表される目的化合物の分子量1681を示した。また、得られた化合物の重ジメチルスルホキシド溶媒中での1H-NMRのケミカルシフト値(δppm,TMS基準)は0.8~1.9(m,44H)、2.0(s,24H)、5.5~5.6(d,4H)、5.7(s,8H)、6.0~6.8(m,32H)であった。これらの結果から得られた化合物を、CR-2Aのフェノール性水酸基の水素原子の100mol%がメタクリロイル基で置換された、下記式(CR-6)で表される化合物(以下「CR-6」とも記す。)と同定した。
・化合物の安全溶媒溶解度試験
上記合成実施例1~6及び合成例1~2で得られた化合物のプロピレングリコールモノメチルエーテル(PGME)、及びシクロヘキサノン(CHN)への溶解量を以下のとおり評価した。該評価結果を第1表に示す。
〔評価基準〕
A:5.0質量% ≦ 溶解量
B:3.0質量%≦ 溶解量 <5.0質量%
C:溶解量 <3.0質量%
※溶解量(質量%)=23℃の溶媒100g中に溶解した化合物の質量(g)/(溶媒の質量100g+23℃の溶媒100g中に溶解した化合物の質量(g))×100
(1)感放射線性組成物を調製
第2表に記載の成分を調合し、均一溶液とした後、該溶液を孔径0.1μmのテフロン製メンブランフィルターで濾過して、感放射線性組成物を調製した。
P-1:トリフェニルベンゼンスルホニウムトリフルオロメタンスルホネート(みどり化学(株))
酸架橋剤(G)
C-1:ニカラックMW-100LM(三和ケミカル(株))
酸拡散制御剤(E)
Q-1:トリオクチルアミン(東京化成工業(株))
溶媒
S-1:プロピレングリコールモノメチルエーテル(東京化成工業(株))
上記調製した感放射線性組成物を用いて以下のとおりパターニング試験を行った。
上記調製した感放射線性組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中で露光前ベーク(PB)して、厚さ60nmのレジスト膜を形成した。該レジスト膜を電子線描画装置(ELS-7500、(株)エリオニクス社製)を用いて、50nm、40nm及び30nm間隔の1:1のラインアンドスペース設定の電子線を照射した。照射後に、それぞれ110℃で、90秒間加熱し、実施例7及び8で調製した感放射線性組成物から形成されたレジスト膜は、プロピレングリコールモノメチルエーテルアセテート現像液に30秒間、比較例3及び4で調製した感放射線性組成物から形成されたレジスト膜は2.38質量%TMAH水溶液に浸漬して現像を行った。その後、該レジスト膜を超純水で30秒間洗浄し、乾燥して、ネガ型のレジストパターンを形成した。
Claims (17)
- 分子量500~5000の、式(1)で示される環状化合物。
前記R0の少なくともひとつが(メタ)アクリロイル基を含む一価の基である。) - 前記式(1)で示される環状化合物が、式(2)で示される請求項1に記載の環状化合物。
R2は、それぞれ独立して、水素原子、シアノ基、ニトロ基、ハロゲン原子、置換若しくは無置換の炭素数1~20の直鎖状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の分岐状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の環状脂肪族炭化水素基、置換若しくは無置換の炭素数6~20のアリール基、置換若しくは無置換の炭素数7~30のアラルキル基、置換若しくは無置換の炭素数1~20のアルコキシ基、置換若しくは無置換の炭素数2~20のアルケニル基、置換若しくは無置換の炭素数1~20のアシル基、置換若しくは無置換の炭素数2~20のアルコキシカルボニル基、置換若しくは無置換の炭素数1~20のアルキロイルオキシ基、置換若しくは無置換の炭素数7~30のアリーロイルオキシ基又は置換若しくは無置換の炭素数1~20のアルキルシリル基であり、
R’は、それぞれ独立して、水素原子、置換若しくは無置換の炭素数1~20の直鎖状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の分岐状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の環状脂肪族炭化水素基又は下記式(3)
前記R1の少なくともひとつが、(メタ)アクリロイル基である。) - 前記式(2)で示される環状化合物が、式(4)で示される請求項2に記載の環状化合物。
R4は、それぞれ独立して、シアノ基、ニトロ基、置換若しくは無置換の複素環基、ハロゲン原子、置換若しくは無置換の炭素数1~20の直鎖状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の分岐状脂肪族炭化水素基、置換若しくは無置換の炭素数3~20の環状脂肪族炭化水素基、置換若しくは無置換の炭素数6~20のアリール基、置換若しくは無置換の炭素数1~20のアルコキシ基又は置換若しくは無置換の炭素数1~20のアルキルシリル基であり、
pは0~5の整数であり、
前記R1の少なくともひとつが、(メタ)アクリロイル基である。) - 請求項1~4のいずれか1項に記載の環状化合物を製造する方法であって、
1種以上のアルデヒド性化合物(A1)と1種以上のフェノール性化合物(A2)とを縮合反応させて環状化合物(A)を得る工程と、
該環状化合物(A)と1種以上の(メタ)アクリロイルハライドとを脱ハロゲン化水素反応させる工程とを備える、環状化合物の製造方法。 - 前記アルデヒド性化合物(A1)が、1~4個のホルミル基を有し、かつ炭素数1~59であり、
前記フェノール性化合物(A2)が、1~3個のフェノール性水酸基を有し、かつ炭素数6~15である、請求項5に記載の環状化合物の製造方法。 - 請求項1~4のいずれか1項に記載の環状化合物を含む固形成分及び溶媒を含有する、感放射線性組成物。
- 前記固形成分の含有量が1~80重量%である、請求項7に記載の感放射線性組成物。
- 前記固形成分の全重量に占める前記環状化合物の割合が50~99.999重量%である、請求項7又は8に記載の感放射線性組成物。
- 可視光線、紫外線、エキシマレーザー、電子線、極端紫外線(EUV)、X線及びイオンビームからなる群から選ばれるいずれかの放射線の照射により直接的又は間接的に酸を発生する酸発生剤(C)をさらに含む、請求項7~9のいずれか1項に記載の感放射線性組成物。
- 酸架橋剤(G)をさらに含む、請求項7~10のいずれか1項に記載の感放射線性組成物。
- 酸拡散制御剤(E)をさらに含む、請求項7~11のいずれか1項に記載の感放射線性組成物。
- 前記固形成分が、環状化合物50~99.4重量%、酸発生剤(C)0.001~49重量%、酸架橋剤(G)0.5~49重量%、及び酸拡散制御剤(E)0.001~49重量%を含有する、請求項7~12のいずれか1項に記載の感放射線性組成物。
- スピンコートによりアモルファス膜を形成する、請求項7~13のいずれか1項に記載の感放射線性組成物。
- 前記アモルファス膜の23℃における現像液に対する溶解速度が10Å/sec以上である、請求項14に記載の感放射線性組成物。
- KrFエキシマレーザー、極端紫外線、電子線若しくはX線を照射した後の前記アモルファス膜、又は20~250℃で加熱した後の前記アモルファス膜の、現像液に対する溶解速度が5Å/sec以下である、請求項14又は15に記載の感放射線性組成物。
- 請求項7~16のいずれか1項に記載の感放射線性組成物を、基板上に塗布してレジスト膜を形成する工程と、
該レジスト膜を露光する工程と、
該露光したレジスト膜を現像する工程とを備える、レジストパターン形成方法。
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JP2018536885A (ja) * | 2015-08-28 | 2018-12-13 | ヨンチャン ケミカル カンパニー リミテッドYoung Chang Chemical Co.,Ltd | エッチング耐性に優れたi線用ネガ型フォトレジスト組成物 |
US10550068B2 (en) | 2015-07-23 | 2020-02-04 | Mitsubishi Gas Chemical Company, Inc. | Compound and method for producing same |
US10723690B2 (en) | 2015-07-23 | 2020-07-28 | Mitsubishi Gas Chemical Company, Inc. | (Meth)acryloyl compound and method for producing same |
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US10723690B2 (en) | 2015-07-23 | 2020-07-28 | Mitsubishi Gas Chemical Company, Inc. | (Meth)acryloyl compound and method for producing same |
JP2018536885A (ja) * | 2015-08-28 | 2018-12-13 | ヨンチャン ケミカル カンパニー リミテッドYoung Chang Chemical Co.,Ltd | エッチング耐性に優れたi線用ネガ型フォトレジスト組成物 |
JP2017145320A (ja) * | 2016-02-17 | 2017-08-24 | 公立大学法人 富山県立大学 | テンプレート形成用重合性化合物及びその硬化性組成物並びにその硬化物 |
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EP2781504B1 (en) | 2017-01-04 |
JPWO2013073582A1 (ja) | 2015-04-02 |
EP2781504A4 (en) | 2015-06-17 |
EP2781504A1 (en) | 2014-09-24 |
TW201339133A (zh) | 2013-10-01 |
JP6313045B2 (ja) | 2018-04-18 |
US20140329178A1 (en) | 2014-11-06 |
US9182666B2 (en) | 2015-11-10 |
KR102004692B1 (ko) | 2019-07-29 |
CN103958455A (zh) | 2014-07-30 |
KR20140104949A (ko) | 2014-08-29 |
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