Patent ID: 6284329
Filing Date: 2001-09-04
Classification: B32B,C23C,H05K,Y10T

Abstract:
A method of depositing an adherent metal film to at least one surface of a polyimide substrate comprising the steps of:(a) exposing at least one surface of the polyimide substrate to a reactive gas plasma that results in carboxyl or carboxylate group formation, and that provides a level of ion bombardment of at least about 9.times.10.sup.17 eV/liter-atm, wherein the level of ion bombardment is represented by the equation: (q).times.(n.sub.+).times.(.o slashed..sub.f)/p; whereq=the unit electronic charge (equal to 1 for units of e/V/liter-atm);n.sub.+ =the number density of positive ions in the plasma (liter.sup.-1);(.o slashed..sub.f)=the potential difference between the plasma and the polyimide surface (volts); andp=pressure in atmospheres; and(b) then depositing a metallic film onto the ion-bombarded surface without intervening exposure to air.