Patent ID: 8741544

Claim:
A photoresist composition which comprises a resin which is soluble in an aqueous alkali solution by action of an acid and a salt represented by formula (I): wherein Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, L 1 represents a group represented by any one of formulae (L 1 -1), (L 1 -2) and (L 1 -3) wherein X 0 represents a single bond, a C1-C14 divalent aliphatic hydrocarbon group which can have a fluorine atom, or a group represented by formula (a-1) where s represents an integer of 0 or 1, X 10 and X 11 each independently represent an oxygen atom, a carbonyl group, a carbonyloxy group, or an oxycarbonyl group, A 10 and A 11 each independently represent a C1-C12 divalent aliphatic hydrocarbon group which can have a fluorine atom, A 12 represents a single bond or a C1-C12 divalent aliphatic hydrocarbon group which can have a fluorine atom, * represents a binding position to a carbon atom binding to R L , X 1 represents —O—* 1 , —NR 3 —* 1 , —O—CO—* 1 , —O—CH 2 —* 1 , —O—CH 2 —CO—O—* 1 or —NR 3 —CH 2 —* 1 where * 1 represents a binding position to W 1 , X 2 represents —O—* 2 , —NR 3 —* 2 , —O—CO—* 2 , —O—CH 2 —* 2 , —O—CH 2 —CO—O—* 2 or —NR 3 —CH 2 —* 2 where * 2 represents a binding position to W 2 , X 3 represents —O—* 1 , —NR 3 —* 1 , —O—CH 2 —CO—O—* 1 or —O—CH 2 —CO—NR 3 —* 1 where * 1 represents a binding position to W 1 , X 4 represents —O—* 2 , —NR 3 —* 2 , —O—CH 2 —CO—O—* 2 or —O—CH 2 —CO—NR 3 —* 2 where * 2 represents a binding position to W 2 , X 5 represents —O—* 1 , —NR 3 —* 1 , —O—CO—* 1 , —O—CH 2 —* 1 , or —NR 3 —CH 2 —* 1 where * 1 represents a binding position to W 1 , X 6 represents —O—* 2 , —NR 3 —* 2 , —O—CO—* 2 , —O—CH 2 —* 2 or —NR 3 —CH 2 —* 2 where * 2 represents a binding position to W 2 , R 3 represents a hydrogen atom or a C1-C6 alkyl group, R L represents a hydrogen atom or a C1-C14 aliphatic hydrocarbon group which can have a fluorine atom, * 0 represents a binding position to a carbon atom binding to C(Q 1 )(Q 2 ), and m 1 , m 2 , m 3 , m 4 and m 5 each independently represent an integer of 0 to 6, W 1 and W 2 each independently represent a C3-C36 alicyclic hydrocarbon ring in which a methylene group can be replaced by an oxygen atom, a sulfur atom, —NR 4 —, a sulfonyl group or a carbonyl group, where R 4 represents a hydrogen atom or a C1-C6 alkyl group, R 1 and R 2 each independently represent a hydroxy group or a C1-C6 alkyl group, t 1 and t 2 each independently represent an integer of 0 to 2, and Z + represents an organic cation.