Patent ID: 7820020

Claim:
A method of performing physical vapor deposition of metal in a vacuum chamber of a plasma reactor, comprising: providing a metal target near a ceiling of said chamber; placing a wafer on a wafer support pedestal facing said target; introducing a carrier gas into said vacuum chamber; maintaining a target-sputtering plasma at said target by applying target power from a target power generator to said target to produce a stream comprising at least one of metal atoms and metal ions flowing from said target toward said wafer support pedestal for vapor deposition; maintaining a wafer-sputtering plasma at a surface of said wafer by capacitively coupling plasma RF source power of a VHF frequency through said wafer to the wafer-sputtering plasma by applying said RF source power from a VHF source power generator to a conductor in said wafer support pedestal; and accelerating metal ions of said wafer-sputtering plasma in a direction normal to a surface of said wafer support pedestal by applying bias power of an HF or LF frequency from a bias power generator to said wafer support pedestal.