MULTILAYER POLYIMIDE FILM, PROCESS FOR PRODUCING MULTILAYER POLYIMIDE FILM, POLYIMIDE LAMINATE USING SAME, AND COPOLYMIDE POLYIMIDE USED FOR THEM

摘要

A multilayer polyimide film comprising a layer (A) containing a thermoplastic polyimide (A) having a glass transition temperature of less than 240 ° C. and a layer (B) containing a heat-resistant polyimide (B) having a glass transition temperature of 240 ° C. or higher. And the multilayer polyimide film characterized by the thermoplastic polyimide (A) being a polyimide which has a repeating unit represented by General formula (1) is disclosed. [Wherein X1 is a tetracarboxylic acid residue selected from the group represented by the general formula (2). ] [Wherein R1 to R20 each independently represents hydrogen, an alkyl group or halogen. ]