Patent ID: 6270645
Filing Date: 2001-08-07
Classification: C25D,H05K

Abstract:
A process for the production of electrodeposited copper foil having an electrodeposited copper bonding treatment on a surface of the foil for enhancing the bondability of the foil to a polymeric substrate, which comprises:(a) passing a web of raw electrodeposited copper foil directly from a rotating drum cathode machine to a treater tank containing an anode immersed in a copper sulfate-sulfuric acid electrolyte;(b) passing the copper foil through the electrolyte while passing an electric current from a direct current power source to the anode and through the electrolyte to the copper foil to electrodeposit a single micro-roughening copper treatment layer on at least one surface of the copper foil, the treatment layer being electrodeposited under electrodeposition conditions which include a current density of from about 40 to about 100 A/ft2 and a plating time of greater than 30 sec.