Patent ID: 7871918
Filing Date: 2011-01-18
Classification: H01L,H05K

Abstract:
1. A manufacturing method of a contact structure, comprising: providing a substrate, a contact pad already formed thereon; forming a protective layer on the substrate, wherein the protective layer covers an edge portion of the contact pad and exposes a middle portion of the contact pad; forming a polymer bump directly on the contact pad, wherein the polymer bump exposes a portion of the contact pad and contacts with the middle portion of the contact pad exposed by the protective layer; forming a conductive layer on the polymer bump, wherein the conductive layer covers the polymer bump and extends to the outside of the polymer bump, the conductive layer contacts the exposed contact pad, and the portion of the conductive layer extending to the outside of the polymer bump serves as a test pad; and forming an extending layer when the polymer bump is formed, wherein the extending layer is connected to a side surface of the polymer bump and is not formed under a bottom of the polymer bump.