Patent ID: 6224991
Filing Date: 2001-05-01
Classification: C25D,H05K,Y10S,Y10T

Abstract:
Treated copper foil for use in the manufacture of printed circuit boards, comprising:(a) an electrodeposited copper base foil having a shiny drum side and an electrolyte side with a matte surface;(b) a bond-enhancing copper treatment electrodeposited on a bonding side of the base foil, the treatment having a surface micro-profile formed by micro-peaks and micro-valleys; and(c) a cobalt barrier layer electrodeposited on the treatment layer, wherein the cobalt forming the barrier layer has a surface coverage rate of from about 0.03 to about 0.2 grams per square meter and is deposited as a continuous layer on the micro-peaks and micro-valleys of the micro-profile of the treatment surface.