Patent ID: 8367543

Claim:
A method of manufacturing a structure, comprising the steps of: depositing a self patterning high temperature diffusion barrier metal cap on a metal layer formed in a first dielectric layer; depositing a second dielectric layer comprising an Oxide layer, a Nitride layer, and a Polyimide layer on the high temperature diffusion barrier metal cap and first dielectric layer; etching, in a single etching step, a via into the Oxide layer, the Nitride layer, and the Polyimide layer, exposing the high temperature diffusion barrier metal cap, the via being free of lining material; depositing an under bump metallurgy layer in the via which is in contact with the metal cap and the second dielectric layer; and forming a controlled collapse chip connections (C4) ball directly on an upper surface of the under bump metallurgy layer, wherein no intervening layers are provided between the under bump metallurgy layer deposited directly on the self patterning high temperature diffusion barrier metal cap and the C4 ball, and the under bump metallurgy layer comprises one or a combination of Titanium Tungsten, Chromium Copper, or Nickel.