Patent ID: 8747640
Filing Date: 2014-06-10
Classification: C25D,H01L

Abstract:
1. A method for plating metal on a metallic foil for use in semiconductor packaging, comprising: providing a container containing a metal plating solution, the metal plating solution electrically coupled with a first electrode; positioning a plating solution drum over the container; providing a metallic foil strip that is electrically coupled with a second electrode, the metallic foil strip having a first surface and an opposing second surface; tightly winding the metallic foil strip completely around the plating solution drum to form a metallic foil coil such that the first surface of the metallic foil strip is immersed within and exposed to the metal plating solution and a portion of 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; conducting an electrical current between the metallic foil strip and the metal plating solution using the first and second electrodes; rotating the metallic foil strip at least partially around the plating solution drum; and plating metal on additional portions of the first surface of the metallic foil strip as the metallic foil strip rotates at least partially around the plating solution drum without substantially plating metal on the second surface of the metallic foil strip.