ADHESIVE FILM, FLEXIBLE METAL-CLAD LAMINATE OF ENHANCED DIMENSIONAL STABILITY OBTAINED THEREFROM AND PROCESS FOR PRODUCING THE SAME

摘要

An adhesive film from which there can be obtained a flexible metal-clad laminate having any occurrence of dimensional change suppressed in the fabrication according to laminating method. There is provided an adhesive film comprising a polyimide film and, superimposed on at least one major surface thereof, an adhesive layer containing a thermoplastic polyimide and further provided a relevant flexible metal-clad laminate. The polyimide film is formed through the step (A) of mixing a polyamide acid solution with a dehydrating agent/imidizing catalyst, effecting flow casting of the mixture on a support and forming a gel film; the step (B) of detaching the gel film and fixing both ends thereof; and the step (C) of relaxing the film having both ends thereof fixed in the direction of TD and carrying out conveyance while heating.