Patent ID: 6853084
Filing Date: 2005-02-08
Classification: H01L,H05K

Abstract:
1. A substrate within a Ni/Au structure electroplated on electrical contact pads, wherein the electrical contact pads are covered by a Ni/Au layer, said Ni/Au layer prepared by the method comprising the steps of: (a) providing a substrate for an IC package with a circuit layout pattern and forming an electrical conducting film on the surface of the substrate; (b) depositing a first photoresist layer within an opening on said electrical conducting film surface to expose a portion of said circuit layout pattern to be electrical contact pads; (c) removing the exposed conducting film uncovered by the first photoresist layer; (d) depositing a second photoresist layer, covering said conducting film exposed in the opening of the first photoresist layer; (e) electroplating a Ni/Au layer on said electrical contact pads; and (f) removing the first and second photoresists, and said conducting film covered by the photoresists.