Patent ID: 8206888

Claim:
A radiation-sensitive resin composition comprising: (A) a radiation-sensitive acid generator comprising: a compound having a structure represented by the following formula (1-a) and a structure represented by the following formula (1-b); and a sulfonimide compound, wherein, in the formula (1-a), each R 1 , each R 2 , and each R 3 independently represent a hydrogen atom, a hydroxyl group, a linear, branched, or cyclic alkyl group having 1 to 10 carbon atoms, a linear, branched, or cyclic alkoxyl group having 1 to 10 carbon atoms, or a t-butoxycarbonylmethoxy group, and satisfy at least one of a condition under which two or more of the R 1 moieties are respectively a group other than a hydrogen atom, a condition under which two or more of the R 2 moieties are respectively a group other than a hydrogen atom, and a condition under which two or more of the R 3 moieties are respectively a group other than a hydrogen atom, and wherein, in the formula (I-b), each R 4 independently represents a hydrogen atom, a fluorine atom, or a trifluoromethyl group, and one or more of the R 4 moieties are respectively a fluorine atom or a trifluoromethyl group; and (B) a resin having a recurring unit represented by the following formula (2), and at least one of a recurring unit represented by the following formula (3) and a recurring unit represented by the following formula (4): wherein, in the formula (2), R 5 represents a hydrogen atom or a methyl group, R 6 represents a monovalent organic group except for a t-butoxy group and —O—Z (Z is a monovalent acid-labile group other than a t-butyl group), m is any integer of 0 to 3, n is any integer of 1 to 3, and a plurality of the R 6 moieties may be the same as or different from each other, wherein, in the formula (3), R 7 represents a hydrogen atom or a methyl group, R 8 represents a monovalent organic group except for a t-butoxy group and —O—Z (Z is a monovalent acid-labile group other than a t-butyl group), R 9 represents a t-butyl group, p is any integer of 0 to 3, q is any integer of 1 to 3, and a plurality of the R 8 moieties may be the same as or different from each other, and wherein, in the formula (4), R 10 represents a hydrogen atom or a methyl group, and R 11 represents a t-butyl group, and wherein said composition excludes a resin that does not fall within the definition of resin B.