Patent ID: 7135408

Claim:
A method of forming a conductive layer on an underlying low dielectric constant (low k) layer, comprising the steps of: providing said low k layer, said low k layer having a top surface thereon; forming an opening in said low k layer, said opening having sidewalls and a bottom; performing a first deposition procedure of a two step deposition procedure using only a plasma vapor deposition (PVD), to form a first portion of said conductive layer directly on said top surface of said low k layer and directly on said sidewalls and said bottom of said opening; performing a second deposition procedure of said two step deposition procedure using chemical vapor deposition (CVD), to form a second portion of said conductive layer, resulting in said conductive layer on said low k layer comprised of said second portion of said conductive layer overlying said first portion of said conductive layer; and forming in said opening in said low k layer a conductive structure made from a material different from said second portion of said conductive layer, said conductive structure directly contacting said second portion of said conductive layer and being free of contact with said first portion of said conductive layer.