Patent ID: 9646951
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A method of forming a semiconductor device comprising: providing a semiconductor wafer that includes a semiconductor substrate, the semiconductor wafer having a plurality of semiconductor die formed on the semiconductor substrate and separated from each other by singulation regions wherein the plurality of semiconductor die include an under bump conductor and wherein the plurality of semiconductor die also include one of an insulator or a passivation layer abutting and covering sidewalls of the under bump conductor and overlying a portion of a surface of the semiconductor wafer; forming a conductor bump on the under bump conductor and extending a first distance away from a surface of the under bump conductor; and subsequently forming a protective layer on an outer surface of the conductor bump including forming the protective layer as a first conductor material that protects the conductor bump from an etchant used to singulate the semiconductor die wherein the etchant removes a portion of the first material.