Patent ID: 8551303

Claim:
A system for plating a workpiece, said system comprising: a container; and a plurality of anode layers in said container, said plurality of anode layers comprising at least: a first anode layer adjacent to a wall of said container; and a second anode layer adjacent to said first anode layer, said first anode layer and said second anode layer each comprising multiple discrete multi-anode structures arranged in a line, said multi-anode structures in said first anode layer and said second anode layer being offset and spaced an approximately uniform distance apart, said uniform distance being less than a width of any one of said multi-anode structures such that each multi-anode structure in said first anode layer has at least a first side edge that is overlapped by a second side edge of one of said multi-anode structures in said second anode layer, and said multi-anode structures each comprising a first anode that comprises a first metal and a second anode that laterally surrounds said first anode and that comprises a second metal that is different from said first metal.