CURABLE RESIN COMPOSITION, CURABLE RESIN COMPOSITION FOR FORMING PERMANENT COATING FILM, DRY FILM, AND PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a curable resin composition that can give a cured coating film excellent in folding resistance after a reflow process without decreasing other various characteristics, a composition for forming a permanent coating film, a dry film, and a printed wiring board.SOLUTION: The curable resin composition comprises (A) a carboxyl group-containing resin, (B) an inorganic filler, (C) a thermosetting component, and (D) a photopolymerization initiator. The carboxyl group-containing resin (A) contains a carboxyl group-containing resin having a phenol novolac skeleton and a carboxyl group-containing resin having a urethane bond.