Patent ID: 7658970

Claim:
A method for forming an interconnect structure on a substrate surface within a processing chamber, comprising: depositing a tungsten-containing barrier layer over an exposed contact metal surface within an aperture formed in an insulating material disposed on a substrate; forming a cobalt-containing layer on the tungsten-containing barrier layer using a cyclical deposition process by sequentially exposing the substrate to a cobalt precursor gas and a silicon reducing gas, wherein the cobalt precursor gas comprises a cobalt precursor selected from the group consisting of cyclopentadienyl cyclohexadienyl cobalt, cyclobutadienyl cyclopentadienyl cobalt, bis(cyclopentadienyl) cobalt, cyclopentadienyl 1,3-hexadienyl cobalt, and cyclopentadienyl 5-methylcyclopentadienyl cobalt; and depositing a copper material on the cobalt-containing layer.