Patent ID: 7651934
Filing Date: 2010-01-26
Classification: C23C,H01L

Abstract:
1. A method for forming a conductive material within a feature on a substrate comprising: depositing a seed layer selectively onto a bottom surface of a feature on a substrate while sidewalls of the feature remain substantially free of the seed layer during a collimated physical vapor deposition process; and depositing a copper-containing layer on the seed layer to fill the feature during an electroless deposition process, wherein the seed layer comprises a metal selected from the group consisting of copper, ruthenium, cobalt, tantalum, titanium, tungsten, rhenium, palladium, platinum, nickel, alloys thereof, and combinations thereof and wherein the seed layer is deposited on a barrier layer disposed on the substrate, the barrier layer comprises a material selected from the group consisting of tantalum, tantalum nitride, tantalum silicon nitride, titanium, titanium nitride, titanium silicon nitride, ruthenium, tungsten, tungsten nitride, alloys thereof, derivatives thereof, and combinations thereof.