Patent ID: 8722816

Claim:
A solder resist comprising an acid-modified vinyl ester synthesized from an epoxy compound, a phenol compound, an unsaturated monobasic acid and a polybasic acid anhydride, and a compound having two or more functional groups reactable with a carboxyl group in one molecule, wherein the epoxy compound contains a crystalline epoxy resin having a melting point of 90° C. or more, the phenol compound contains a compound having a bisphenol S structure, the compound having two or more functional groups reactable with a carboxyl group in one molecule contains a biphenyl epoxy resin and a biphenyl novolac epoxy resin, an amount of an epoxy compound other than the crystalline epoxy resin is 75 mol % or less when the entire epoxy compound is 100 mol %, an amount of a phenol compound having no biphenol S structure is 75 mol % or less when the entire phenol compound is 100 mol %, and an amount of the compound having two or more functional groups reactable with a carboxyl group in one molecule is 5 parts by mass to 70 parts by mass relative to 100 parts by mass of a total of a resin solid content (a total amount of the acid-modified vinyl ester and a solid content of a radical polymerizable resin) and a radical polymerizable monomer content.