Patent ID: 8760882
Filing Date: 2014-06-24
Classification: H01L,H05K

Abstract:
1. A wiring structure for improving a crown-like defect, the wiring structure comprising: a substrate; a seed layer formed on the substrate; a copper layer formed on the seed layer, wherein the copper layer and a portion of the seed layer are etched to form a wiring layer; a barrier layer covering at least a top portion of the copper layer, wherein an oxidation potential of the barrier layer is greater than an oxidation potential of the copper layer, and wherein a width of the barrier layer is greater than a width of the top portion of the copper layer to form a protrusion extended outwardly of the top portion of the copper layer, the protrusion having a bottom surface aligned with the top portion of the copper layer; and an anti-oxidation layer comprehensively covering the barrier layer, the bottom surface of said protrusion and sidewalls of the wiring layer.