Patent ID: 7172851

Claim:
A light sensitive composition comprising an addition polymerizable ethylenically unsaturated monomer A), a photopolymerization initiator B), a polymer binder C), and a cation-polymerizable compound D), wherein the photopolymerization initiator B) is an iron-arene complex, the addition polymerizable ethylenically unsaturated monomer A) is a compound represented by formula (A), wherein Q 1 represents or â€”Sâ€”; R 4 represents an alkyl group, a hydroxyalkyl group, or an aryl group; R 1 and R 2 independently represent a hydrogen atom, an alkyl group, or an alkoxyalkyl group; R 3 represents a hydrogen atom, a methyl group or an ethyl group; X 1 represents a divalent group having a carbon atom number of from 2 to 12; and X 2 represents a divalent, trivalent or tetravalent group or the following group, wherein Z represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a halogen atom, an alkoxy group, or a heterocyclic group; p is an integer of from 1 to 4; q is an integer of from 1 to 3; D 1 and D 2 independently represent a divalent group having a carbon atom number of from 1 to 5; E represents a divalent group having a carbon atom number of from 2 to 12; an aliphatic group having a 5- to 7-membered heterocyclic group containing one or two atoms selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom; an arylene group having a carbon atom number of from 6 to 12 or a 5- or 6-membered aromatic heterocyclic group; â€œaâ€ is an integer of 0 to 4; â€œbâ€ is an integer of 0 or 1; â€œcâ€ represents an integer of 1 to 3; m is an integer of from 2 to 4; and n represents an integer of 1 to m, and wherein the cation-polymerizable compound D) is a compound represented by formula (I) or (II), wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a hydrogen atom or an alkyl group having a carbon atom number of not more than 4; and X 2 represents a chemical bond or a divalent organic group wherein R 3 represents a hydrogen atom or a methyl group; R 4 represents a hydrogen atom or an alkyl group having a carbon atom number of not more than 4; and X 2 represents a chemical bond, or a divalent organic group.