Patent ID: 6489229
Filing Date: 2002-12-03
Classification: H01L

Abstract:
A method of forming a semiconductor device conductive bump comprising:providing a substrate; forming a conductor overlying the substrate; forming a diffusion barrier layer overlying and adjoining the conductor; forming a first metallic layer overlying and in direct contact with the diffusion barrier layer, the first metallic layer being devoid of any gold content, wherein an oxidation layer naturally forms on the first metallic layer upon exposure to ambient air; forming a seed layer of a predetermined metal overlying and on the oxidation layer wherein the seed layer is electrically coupled to the first metallic layer; forming a conductive bump overlying and in direct contact with the seed layer, wherein the semiconductor device conductive bump has no gold content; and reflowing the conductive bump at an elevated temperature to sufficiently displace the oxidation layer with an intermetallic of the seed layer and the first metallic layer to enhance adhesion of the conductive bump to the conductor.