Patent ID: 6806192
Filing Date: 2004-10-19
Classification: H01L

Abstract:
A method for creation of a copper interconnect, comprising:providing a substrate, having one or more insulating layers formed thereover; creating an opening in said one or more insulating layers; lining sidewalls of the opening with a compound layer by applying methods of deposit and etch, said compound layer comprising: (i) a patterned layer of metal barrier material over the sidewalls, thereby including a layer of metal barrier material oxide created over the surface there-of, exposing a bottom surface of the opening; (ii) a patterned layer of doped copper over the layer of barrier material and the metal barrier material oxide layer; and (iii) a layer of pure copper over the layer of doped copper; filling the opening with copper; and applying an anneal to the substrate and the there-over created layers.