LAMINATE AND MULTILAYERED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a laminate which is suitable for producing a multilayered printed wiring board capable of being simultaneously bored by a carbon dioxide gas laser drilling device, and having high heat resistance, narrow pitch wiring pattern, small diameter via, uniform insulating layer thickness and suitably low linear expansion coefficient. SOLUTION: In the laminate having a conductor layer on at least one side of a polyimide film and having an adhesive layer on the other side, the conductor layer, the polyimide film and the adhesive layer, which can be bored by a carbon dioxide gas laser, are to be used.