ADHESIVE FILM, FLEXIBLE METAL-CLAD LAMINATE, AND PROCESSES FOR PRODUCING THESE

摘要

An adhesive film with which a flexible metal-clad laminate inhibited from suffering a dimensional change is obtained through laminating; and a flexible metal-clad laminate comprising the adhesive film and a metal foil bonded thereto. The adhesive film comprises a polyimide film and, formed on at least one side thereof, an adhesive layer comprising a thermoplastic polyimide and has coefficients of linear expansion satisfying the relationship 1.0>(coefficient of MD linear expansion)/(coefficient of TD linear expansion)>0.1. This adhesive film may be one produced continuously and further satisfying the relationship 1.70>(MD modulus)/(TD modulus)>1.05 when the adhesive film has an MD modulus of 5 GPa or higher throughout the whole width thereof. That adhesive film may be one produced continuously and further satisfying the relationship 2.00>(MD modulus)/(TD modulus)>1.10 when the adhesive film has an MD modulus less than 5 GPa throughout the whole width thereof.