Patent ID: 8569162
Filing Date: 2013-10-29
Classification: H01L

Abstract:
1. A fabrication method of a conductive bump structure on a substrate, the substrate having a plurality of bonding pads, and a first insulating layer and a second insulating layer formed thereon, wherein the first insulating layer is formed on the second insulating layer, the first insulating layer has a plurality of first openings for exposing the corresponding bonding pads, and the second insulating layer is formed with a plurality of second openings for exposing the bonding pads, the method comprising the steps of: forming a metal layer on each of the bonding pads; forming a conductive post on the metal layer; and forming a conductive material on the conductive post, wherein a gap is formed between the conductive post and a wall of the first opening, and another gap is formed between the conductive post and a wall of the second opening.