Patent ID: 7267925

Claim:
A photosensitive composition containing: (A) a sensitizing dye represented by the following formula (2): wherein A represents an optionally substituted aromatic or heterocyclic ring; X represents an oxygen atom; R 4 and R 5 each independently represents a hydrogen atom or a monovalent non-metallic atomic group; R 6 represents a substituted aryl group, wherein the substituent group in the substituted aryl group is selected from the group consisting of an ester group and a cyano group, and wherein the sum of the Hammett's values on the substituent group(s) of the substituted aryl group is greater than 0; and A and R 4 , R 5 or R 6 may be bonded to each other to form an aliphatic or aromatic ring; (B) an initiator compound capable of generating a radical, an acid, or a base; and (C) a compound whose physical or chemical characteristic irreversibly changes by at least one of a radical, an acid, and a base, wherein the initiator compound (B) is a hexaaryl biimidazole.