ALTERATION OF AT LEAST ONE FACET OF POLYIMIDE BASE

摘要

The adhesion of metal to a polyimide substrate is enhanced by depositing onto at least one surface of the polyimide a thin film of metal such as copper and heating in air to cause the deposited metal to texturize that surface by producing asperities that are at least 0.05 mu m in average height and average breadth. In doing so, metal oxide clusters are formed at the textured surface. When the textured surface is metallized, the resulting composite resists delamination even at soldering temperatures.