Patent ID: 7524563
Filing Date: 2009-04-28
Classification: B32B,C08J,C08K,C08L,C09J,C09K,H05K,Y10T

Abstract:
1. A coverlay film, having an electrically insulating film, a layer of a semi-cured product of a flame retardant adhesive composition, and a protective layer, wherein said composition is applied to a surface of said electrically insulating film to form a coated surface, said coated surface further bonded to a side of said protective layer to form said coverlay film; wherein said flame retardant adhesive composition comprises: (A) a halogen-free epoxy resin; (B) a thermoplastic resin, a synthetic rubber, or a combination thereof; (C) a curing agent; (D) a phytate compound; and (E) a curing accelerator.