MULTILAYER FILM OF POLYIMIDE PRECURSOR SOLUTION, MULTILAYER POLYIMIDE FILM, SINGLE-SIDED METAL-CLAD LAMINATED SHEET AND MANUFACTURING METHOD OF MULTILAYER POLYIMIDE FILM

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a base material for a single-sided metal-clad laminated sheet enhanced in the adhesiveness of a high heat-resistant polyimide and a thermoplastic polyimide and also enhanced in solder heat resistance without performing any surface treatment. SOLUTION: A multilayer film of a polyimide precursor solution is constituted by laminating at least a solution layer (a) containing the thermoplastic polyimide and/or the precursor of the thermoplastic polyimide, a solution layer (b) containing a non-thermoplastic polyimide precursor and a solution layer (c) containing a heat-resistant polymer in this order and the non-thermoplastic polyimide precursor contained in the solution layer (b) is the precursor of a non-thermoplastic polyimide having a thermoplastic block component in its molecule. The multilayer polyimide film is obtained by heating or imidating the multilayer film. COPYRIGHT: (C)2008,JPO&INPIT