Patent ID: 7067226

Claim:
A photosensitive film for circuit formation, comprising: a first film; a cushion layer comprising an ethylene/ethyl acrylate copolymer formed using ethylene as an essential copolymerizable monomer at a copolymerizing ratio of ethylene in the copolymerized monomers of 60 to 90%, by weight; and a photosensitive layer having a thickness of 3 to 10 μm on the first film, wherein the cushion layer is present between the first film and the photosensitive layer and the photosensitive layer comprises (A) a binder polymer that is a copolymer formed using a styrene or styrene derivative as an essential monomer, (B) a photopolymerizable compound having at least one polymerizable ethylenically unsaturated bond, and (C) a photopolymerization initiator; and interlayer adhesion between the first film and the cushion layer is higher than interlayer adhesion between the cushion layer and the photosensitive layer.