Patent ID: 8101336

Claim:
A photocurable and thermosetting resin composition developable with a dilute alkaline solution, comprising: a carboxylic resin; a first photopolymerization initiator comprising an oxime ester group expressed by formula (I): wherein R1 represents a hydrogen atom, an alkyl group having 1 to 7 carbon atoms, or a phenyl group, R2 represents an alkyl group having 1 to 7 carbon atoms, or a phenyl group; a second photopolymerization initiator; a compound having two or more ethylenically unsaturated groups within one molecule thereof; and a sulfur compound expressed by formula (II): wherein the second photopolymerization initiator comprises one or a mixture of two or more compounds selected from the group consisting of an amino acetophenone-based photopolymerization initiator comprising a structure expressed by formula (III), and an acylphosphine oxide-based photopolymerization initiator expressed by formula (IV): wherein R3 and R4 each independently represent an alkyl group or arylalkyl group having 1 to 12 carbon atoms, R5 and R6 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or R5 and R6 may be linked together to form a cyclic alkyl ether group, and R7 and R8 each independently represent a linear or branched alkyl group having 1 to 10 carbon atoms, a cyclohexyl group, a cyclopentyl group, an aryl group which may be substituted with a halogen atom, an alkyl group, or an alkoxy group, or R—C(═O)— group wherein R is a hydrocarbon group having 1 to 20 carbon atoms; the case where both of R7 and R8 are R—C(═O)— groups is excluded.