Verfahren und Film zur Herstellung von gedruckten Schaltungsplatten.

摘要

A composite film comprising an additive layer (5) and an insulating layer (4) containing an epoxy resin and a synthetic rubber as major components, is used in the manufacture of printed wiring boards via the additive method. The composite film is laminated on both sides of a substrate, especially an inner layer circuit substrate, and cured. Through-holes are drilled, and the resulting laminate is masked with a plating resist, roughened and electrolessly plated.