Patent ID: 8900790

Claim:
A photoresist composition comprising a resin, a salt represented by the formula (B1): wherein Q 1 and Q 2 each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, L b1 represents a single bond or a C1-C17 divalent saturated hydrocarbon group in which one or more methylene groups can be replaced by —O— or —CO—, Y represents a C1-C18 aliphatic hydrocarbon group which can have one or more substituents, or a C3-C18 saturated cyclic hydrocarbon group which can have one or more substituents, and one or more methylene groups in the aliphatic hydrocarbon group and the saturated cyclic hydrocarbon group can be replaced by —O—, —CO— or —SO 2 —, and Z + represents an organic cation, and a compound represented by the formula (I): wherein R 1 represents a C2-C12 alkyl group which can have one or more hydroxyl groups or a C7-C12 aralkyl group which can have one or more hydroxyl groups, and one or more —CH 2 — in the alkyl and aralkyl groups can be replaced by —O— or —CO—, R 2 and R 3 each independently represent a hydrogen atom or a C1-C12 alkyl group which can have one or more hydroxyl groups, and one or more —CH 2 — in the alkyl group can be replaced by —O— or —CO—, and R 1 and R 2 can be bonded each other to form a C3-C36 ring together with the carbon atom to which R 1 and R 2 are bonded, and the ring can have one or more hydroxyl groups and one or more —CH 2 — in the ring can be replaced by —O— or —CO—, R 4 and R 5 each independently represent a hydrogen atom, a C1-C6 alkyl group, a C3-C12 saturated cyclic hydrocarbon group, a C6-C12 aromatic hydrocarbon group or a C5-C9 heteroaromatic group, and R 4 and R 5 can be bonded each other to form a C5-C6 heterocycle together with —CH—N— to which R 4 and R 5 are bonded, and the alkyl group can have one or more substituents selected from the group consisting of —OH, —SH, —NH 2 , a C3-C12 saturated cyclic hydrocarbon group, a C6-C12 aromatic hydrocarbon group and a C5-C9 heteroaromatic group, and one or more —CH 2 — in the alkyl group can be replaced by —O—, —S—, —CO—, —C(═NH) or —NH—, and the saturated cyclic hydrocarbon group, the aromatic hydrocarbon group and the heteroaromatic group can have one or more substituents selected from the group consisting of —OH, —CO—R 7 , —O—CO—R 7 and —CO—O—R 7 in which R 7 represents a C1-C6 alkyl group, R 6 represents a C3-C12 saturated cyclic hydrocarbon group, a C6-C12 aromatic hydrocarbon group or a C5-C9 heteroaromatic group, and A 1 represents a single bond or a C1-C2 alkylene group in which one methylene group can be replaced by an oxygen atom.