Patent ID: 8455577

Claim:
A photosensitive resin composition comprising: (A) a linear polymer of an ethylenically unsaturated compound comprising a carboxyl-containing ethylenically unsaturated compound; (B) a bisphenol-F epoxy resin; (C) a polymerizable compound containing an ethylenically unsaturated group; (D) a photopolymerization initiator; and (E) a cyclic phosphazene represented by the following general formula (1): wherein R 1 and R 2 , which may be the same or different, are each a C 1 to C 18 alkyl group, (wherein R 3 is a hydrogen atom, a cyano group, a C 1 to C 10 alkyl group, an allyl group, a phenyl group or a hydroxyl group), and n is an integer of 3 to 25, the photosensitive resin composition having a tensile breaking elongation percentage of not less than 10% and a 2% weight loss temperature of not lower than 260° C. after being cured.