Patent ID: 6042711
Filing Date: 2000-03-28
Classification: C25D,H05K

Abstract:
A process for making a treated metallic foil having improved peel strength comprising the steps of:(A) electrodepositing a dusty dendritic layer of copper on one surface of a metal foil, wherein the current density Is applied in the range of about 250 ASF to about 400 ASF, a copper ion concentration in the range from about 24 to about 26 grams per liter, a bath temperature in the range from about 90.degree. F. to 110.degree. F., and a sulfuric acid concentration in the range from about 90 to about 110 grams per liter; and(B) electrodepositing on the surface of the dusty dendritic deposit of step (A) a uniform metal flash major amount of of a metal other than copper to provide a treated metallic foil exhibiting a peel strength of at least 12 pounds per inch based upon GI-FR4.TM. lamination.