Patent ID: 7364998
Filing Date: 2008-04-29
Classification: H01L

Abstract:
1. A method for forming a bump on a semiconductor device, comprising: forming a first passivation layer on the semiconductor device; patterning and etching the first passivation layer to form a plurality of openings in the first passivation layer; forming a contact pad layer over the etched first passivation layer; patterning and etching the contact pad layer to form a contact pad, the contact pad having a plurality of openings therein; forming a second passivation layer over the first passivation layer and the contact pad; patterning and etching the second passivation layer to form an opening in the second passivation layer partially exposing a surface of the contact pad; and depositing a UBM (Under Bump Metallurgy) layer over the etched second passivation layer and the contact pad, and in the plurality of openings of the contact pad.