ADHESIVE SHEET, METAL-LAMINATED SHEET AND PRINTED WIRING BOARD

摘要

Disclosed is an adhesive sheet comprising a base film and an adhesive layer formed on at least one side of the base film. The base film is composed of a polyimide film whose degree of curling is not more than 10% after a heat treatment at 300°C. Since this adhesive sheet is suppressed in warping or strain caused by high-temperature treatments, it can be used for electronic devices and the like which are exposed to high temperatures and enables to improve the qualities and yields of the electronic devices and the like.