Patent ID: 9426894
Filing Date: 2016-08-23
CPC Classification: H01L,H05K

Claim Text:
1. A method of fabricating a wiring structure for improving a crown-like defect, the method comprising the steps of: providing a substrate on which a seed layer and a patterned photoresist layer with an opening are formed; forming a copper layer in the opening, wherein the copper layer has a bottom covering the seed layer; forming a barrier layer on the copper layer, wherein the barrier layer covers at least a top portion of the copper layer, and an oxidation potential of the barrier layer is greater than an oxidation potential of the copper layer; removing the patterned photoresist layer to perform an etching process, wherein the copper layer and a portion of the seed layer exposed are etched to form a wiring layer; and performing an immersion process to form an anti-oxidation layer comprehensively on exposed surfaces of the barrier layer and the wiring layer, wherein the exposed surfaces of the barrier layer comprise an exposed bottom surface.