Patent ID: 6972152

Claim:
An article comprising: a wire-bonding substrate including a first surface and a second surface, wherein the substrate includes at least one of: a bond finger disposed on the first surface, wherein the bond finger includes a metallization in the substrate, and includes a metallic surface finish above and on the metallization; a land pad for a ball attach on the second surface, wherein the land pad exposes a metallization in the substrate, and includes a metallic surface finish below and on the metallization; and wherein the metallic surface finish has a higher electrochemical potential than the metallization in the substrate, wherein the metallization is copper, and wherein the metallic surface finish includes: a first plating layer above and on the metallization, wherein the first plating layer is selected from gold, gold alloy, silver, silver alloy, platinum, platinum alloy, iridium, iridium alloy, and combinations thereof; and a second plating layer above and on the first plating layer, wherein the second plating layer includes an equal or higher electrochemical potential than the first plating layer, and wherein the metallic surface finish is in a thickness range from about 0.01 μm to about 10 μm.