| 摘要 |
PURPOSE:To improve the dimensional stability and film characteristics by applying polyamic acid obtained through the reaction of specific two kinds of acid anhydride and two kinds of amine in a solvent, to metallic foil. CONSTITUTION:Applied on a metallic foil is at least two kinds of 20-80mol.% pyromellitic dianhydride and 80-20mol.% 3,3',4,4 '-biphenyl tetracarboxylic dianhydride and polyamic acid obtained through the reaction of two kinds of amine of 50-80mol.% p-phenylene diamine and 50-20mol.% diamine represented by the formula. Following this, it is heated Into dry imidation for obtaining a polyinide film/metallic foil laminated body. In the formula, X indicates a hydrocarbon radical of l-10 direct-coupled carbon numbers, hexafluoro isopropylidene, a carbonyl group, a thio group or a sulfonyl group. |
