Patent ID: 8377267

Claim:
An apparatus for plating metal on a surface of a metallic foil for use in semiconductor packaging, comprising: a container containing a metal plating solution; a plating solution drum positioned over the container; a metallic foil strip having a first surface and an opposing second surface, portions of the metallic foil strip wound tightly and completely around the plating solution drum to form a metallic foil coil such that the first surface of the metallic foil strip is at least partially exposed to and immersed in the metal plating solution and the second surface of the metallic foil strip is pressed tightly against a turn in the metallic foil coil and does not come in substantial contact with the metal plating solution; a first electrode electrically coupled with the metal plating solution; and a second electrode electrically coupled with the metallic foil strip, the first and second electrodes arranged to conduct an electrical current through the metal plating solution and the metallic foil strip, wherein the apparatus is arranged to rotate the metallic foil strip at least partially around the plating solution drum and through the metal plating solution, the apparatus further arranged to plate metal from the metal plating solution on additional portions of the first surface of the metallic foil strip during said rotating without substantially plating metal on the second surface of the metallic foil strip.