METHOD OF PRODUCING TREATED COPPER FOIL, PRODUCTS THEREOF AND ELECTROLYTE USEFUL IN SUCH METHOD

摘要

An improved treatment for copper foil comprising electrodepositing a metallic barrier layer of copper, zinc and antimony on at least one side of the foil which, preferably, has a matte surface formed prior to forming the barrier layer. The so-treated foil provides a high bonding strength when laminated to polymeric substrates and resists undercutting by mineral acid etchants and rinses during production of printed circuit boards.