Patent ID: 8841050

Claim:
A photosensitive resin composition comprising: (A) an alkali-soluble resin; (B) an o-naphthoquinonediazidesulfonic acid ester; (C) a silsesquioxane having at least two thiol groups in a molecule; and (D) a solvent; wherein said silsesquioxane is obtained by subjecting to condensation a silane material which includes a thiol-group-containing silane represented by formula (I): R a Si(OR b ) 3 (I), wherein R a represents a C 1 -C 8 organic group that contains a thiol group and that is free from an aromatic group, or an organic group that contains a thiol group and an aromatic group, and R b independently represents hydrogen, a C 1 -C 6 alkyl group, a C 1 -C 6 acyl group, or a C 6 -C 15 aromatic group, and wherein said alkali-soluble resin (A) is obtained by subjecting a mixture to copolymerization, said mixture containing (a1) at least one of an unsaturated carboxylic acid compound or an unsaturated carboxylic anhydride compound, (a2) an unsaturated compound having an epoxy group, and (a3) an unsaturated compound different from said unsaturated carboxylic acid compound, said unsaturated carboxylic anhydride compound, and said unsaturated compound having an epoxy group.