Patent ID: 7763321
Filing Date: 2010-07-27
Classification: B32B,C08G,H05K,Y10T

Abstract:
1. A process for manufacturing a metal laminate comprising a polyimide copolymer layer, comprising the steps of subjecting two kinds of tetracarboxylic acid dianhydrides consisting of (A) isopropylidenebis(4-phenyl-eneoxy-4-phthalic acid) dianhydride and (B) 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride to reaction with one kind of diamine consisting of (C) 6-amino-2-(p-aminophenyl)benzimidazole or two or three kinds of diamines consisting of component (C) and (D) at least one kind of diamines consisting of bis(4-aminophenyl)ether (D 1 ) and phenylenediamine (D 2 ) in a polar solvent, applying the resulting solution of polyamic acid in the polar solvent to a metallic foil, drying the solvent off, and then heating to a polyimidization reaction temperature.