FLEXIBLE LAMINATE HAVING THERMOPLASTIC POLYIMIDE LAYER AND METHOD FOR MANUFACTURING THE SAME

摘要

Disclosed is a flexible laminate comprising a metal foil layer/a thermoplastic layer or/and a conductive circuit layer/a thermoplastic polyimide layer, which is obtained by bonding a metal foil layer or a conductive circuit layer to at least one side of a thermoplastic polyimide layer. In this flexible laminate, the thermoplastic polyimide layer is made of a thermoplastic polyimide resin film or sheet which is obtained by melt-extruding a thermoplastic polyimide resin. Alternatively, the thermoplastic polyimide layer is made of a biaxially stretched thermoplastic polyimide resin film or sheet. Such a flexible laminate can be easily produced by a lamination method wherein a thermoplastic polyimide resin film (1) and a metal foil (2) or a conductive circuit layer (4) are bonded by heat and pressure, and has excellent heat resistance, electrical characteristics and mechanical strength inherent in polyimides. When a biaxially stretched thermoplastic polyimide resin film or sheet is used, the flexible laminate can be improved in dimensional stability and solder heat resistance.