Patent ID: 7740936

Claim:
An adhesion assisting agent fitted metal foil, comprising an adhesion assisting agent layer having a thickness of 0.1 to 10 μm on a metal whose surface has a ten-point average roughness Rz of 2.0 μm or less, wherein the adhesion assisting agent layer is formed from an adhesion assisting agent composition comprising: (A) an epoxy resin which comprises a novolak epoxy resin, the component (A) having a biphenyl structure; and (C) an epoxy resin curing agent, and wherein the adhesion assisting agent composition further comprises (B) a polymer which is able to be chemically roughened, selected from the group consisting of cross-linked rubber particles, polyvinyl acetal resin and a carboxylic acid modified polyvinyl acetal resin, and (D) a curing accelerator.