Patent ID: 7268076

Claim:
A method of performing physical vapor deposition and re-sputtering of an integrated circuit in a vacuum chamber of a plasma reactor, comprising: providing a metal target near a ceiling of said chamber; providing a wafer support pedestal facing said target near a floor of said chamber; introducing a process gas into said vacuum chamber; maintaining a target-sputtering plasma at said target to produce a stream of principally neutral atoms flowing from said target toward said wafer support pedestal for vapor deposition; maintaining a capacitively coupled wafer-sputtering plasma near said wafer support pedestal independent of the target-sputtering plasma by capacitively coupling RF power to the wafer-sputtering plasma through the wafer at a frequency sufficiently high to excite kinetic electrons, to produce a stream of sputtering ions toward said wafer support pedestal for re-sputtering; and accelerating said sputtering ions in a direction normal to a surface of said wafer support pedestal by coupling RF bias power to said wafer at a frequency sufficiently low to accelerate ions across a plasma sheath.