Patent ID: 8431324

Claim:
A radiation-sensitive resin composition comprising: a resin essentially consisting of at least one repeating unit selected from the group consisting of a repeating unit shown by a general formula (a-1a), a repeating unit shown by a general formula (a-1b), a repeating unit shown by a general formula (a-1c), a repeating unit including a lactone structure, a repeating unit shown by a general formula (a-3), a repeating unit shown by a general formula (a-4), and a repeating unit shown by a general formula (a-5); a radiation-sensitive acid generator that comprises a compound (I) shown by a following general formula (I); an acid diffusion controller; and a mixed solvent that includes about 50 mass % to about 90 mass % of propylene glycol monomethyl ether acetate, wherein R a1 represents a hydrogen atom, a methyl group, or a trifluoromethyl group; each R a2 represents an alkyl group having 1 to 10 carbon atoms, or two R a2 s are bonded to form a 3- to 10-membered unsubstituted hydrocarbon ring and R a2 other than the two R a2 s represents an alkyl group having 1 to 10 carbon atoms; and R a3 represents an alkyl group having 1 to 4 carbon atoms; and each R a4 represents an alkyl group having 1 to 4 carbon atoms, wherein R a1 represents a hydrogen atom, a methyl group, or a trifluoromethyl group; R a5 represents a hydrogen atom or a chain hydrocarbon group having 1 to 5 carbon atoms; A represents a single bond, a divalent or trivalent chain hydrocarbon group having 1 to 30 carbon atoms, a divalent or trivalent alicyclic hydrocarbon group having 3 to 30 carbon atoms, or a divalent or trivalent aromatic hydrocarbons group having 6 to 30 carbon atoms, wherein a carbon atom included in A and a carbon atom that forms the cyclic carbonate are bonded to form a ring structure when A is a trivalent group; and n represents an integer from 2 to 4, wherein R a1 represents a hydrogen atom, a methyl group, or a trifluoromethyl group; and R a6 represents an unsubstituted polycyclic cycloalkyl group having 7 to 20 carbon atoms, wherein R a7 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a trifluoromethyl group, or a hydroxylmethyl group; and R a8 represents a divalent chain hydrocarbon group or a divalent cyclic hydrocarbon group, wherein M + represents a sulfonium cation or an iodonium cation, R represents a hydrogen atom or an unsubstituted hydrocarbon group having 1 to 8 carbon atoms, Rf represents a fluorine atom or a perfluoroalkyl group having 1 to 4 carbon atoms, n represents an integer from 1 to 10, and m represents an integer from 1 to 4.