Patent ID: 6224951
Filing Date: 2001-05-01
Classification: B29K,B32B,H05K,Y10S,Y10T

Abstract:
A method of forming a flexible circuit laminate for use in the production of electronic circuits, comprising the steps of:depositing a continuous layer of copper on a first side of a generally continuous strip of polyimide film having at least one layer of metal on said first side;modifying a second side of said polyimide strip to increase the surface energy thereof by depositing a thin layer of a tiecoat metal thereon;applying a dimensionally stable adhesive onto said tiecoat metal, said adhesive being formed of an uncured, polymeric material, said polymeric material having properties wherein it will not significantly flow under a staking pressure exerted along its planar surface; andcuring said adhesive wherein at least an outermost region of said adhesive strip is only partially cured.