RADIATION-SENSITIVE RESIN COMPOSITION, RADIATION-SENSITIVE COVER LAY AND FLEXIBLE PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide: a radiation-sensitive resin composition having high resolution and giving a film having excellent flexibility and flame retardancy; a radiation-sensitive cover lay obtained from the radiation-sensitive resin composition; and a flexible printed wiring board with a protective film obtained from the radiation-sensitive cover lay.SOLUTION: The radiation-sensitive resin composition includes: (A) a novolac type epoxy acrylate resin; (B) a bisphenol type epoxy acrylate resin; (C) a polyfunctional (meth)acrylate compound of hexa- or higher functionality not having a hydroxyl group but having a phosphazene structure; and (D) a photopolymerization initiator.