| abstract |
(57) [Abstract] [PROBLEMS] To provide a multilayer polyimide film produced under mild conditions, a metal foil laminate in which a metal foil is strongly adhered to a highly rigid base polyimide film, and a method for producing the same. [Structure] 2,3,3 ', 4'-biphenyltetracarboxylic dianhydride in a state before semi-curing on one or both surfaces of a base polyimide film made of biphenyltetracarboxylic dianhydride-paraphenylenediamine-based polyimide And 1,3-bis (4-aminiphenoxy) benzenediamine, laminated with a solution of polyimide or polyamic acid obtained by sealing the diamine end with an excess of tetracarboxylic dianhydride or a dicarboxylic acid anhydride, Imidization and drying are performed to obtain a multilayer polyimide film, and a metal foil laminate is obtained by a hot melt method with a metal foil. |