Patent ID: 9082832
Filing Date: 2015-07-14
Classification: H01L

Abstract:
1. A method of making a semiconductor device, comprising: providing a semiconductor wafer having a plurality of contact pads; forming a first insulating layer over the semiconductor wafer and contact pads; removing a portion of the first insulating layer to expose a first portion of the contact pads, while leaving a second portion of the contact pads covered by the first insulating layer; forming an under bump metallization layer over the contact pads and the first insulating layer; forming a plurality of bumps over the under bump metallization layer; forming a second insulating layer over the semiconductor wafer to cover the first insulating layer, a sidewall of the under bump metallization layer, sidewall of the bumps, and upper surface of the bumps; and removing a portion of the second insulating layer over a first portion of the sidewall of the bumps down to the first insulating layer, while maintaining coverage of the second insulating layer over a second portion of the sidewall of the bumps and over the sidewall of the under bump metallization layer to provide structural support for the bumps and prevent growth of inter-metallic compounds.