Patent ID: 8803317

Claim:
A structure comprising: an under bump metallurgy formed in a trench, the under bump metallurgy including at least: an adhesion layer; a sputtered copper layer formed on the adhesion layer; a first plated nickel layer formed on the sputtered copper layer; a plated barrier layer that is a second plated nickel layer; and a plated conductive metal layer that is a first plated copper layer provided between the first plated nickel layer and the plated barrier layer; and a solder bump formed on the under bump metallurgy, wherein the first plated copper layer comprises a top surface that is entirely planar; the second plated nickel layer comprises a top surface that is entirely planar; the first plated nickel layer comprises a via depression located within the trench; and the sputtered copper layer comprises a via depression located within the trench.