Patent ID: 8501613

Claim:
A method comprising: forming an under-bump metallurgy (UBM) layer overlying a substrate; forming a mask overlying the UBM layer, wherein the mask covers a first portion of the UBM layer, with a second portion of the UBM layer exposed through an opening in the mask; forming a metal bump in the opening and on the second portion of the UBM layer; removing the mask; and performing a laser removal to remove a part of the first portion of the UBM layer to form an UBM, wherein after the step of the laser removal, a part of the first portion of the UBM is not removed, and wherein the UBM comprises the second portion of the UBM layer and a remaining part of the first portion of the UBM layer, with the remaining part of the first portion of the UBM layer exposed to a laser beam during the laser removal.