Patent ID: 7244344
Filing Date: 2007-07-17
Classification: C23C,H01J,H01L

Abstract:
1. A plasma reactor, comprising: a vacuum chamber including a sidewall, a ceiling and a wafer support pedestal near a floor of the chamber, and a vacuum pump coupled to the chamber; a removable shield surrounding a processing zone encompassing the wafer support pedestal and separating said processing zone from the sidewall of the chamber; a process gas inlet coupled to said chamber and a process gas source coupled to said process gas inlet; a metal sputter target at said ceiling; a high voltage D.C. source coupled to said sputter target; an RF plasma source power generator coupled to said wafer support pedestal and having a frequency suitable for exciting kinetic electrons; an RF plasma bias power generator coupled to said wafer support pedestal and having a frequency suitable for coupling energy to plasma ions; and a conductive tab coupled between a bottom edge of said shield and said wafer support pedestal; wherein: said wafer support pedestal is movable between a raised position near a bottom edge of said shield and a withdrawn position below said raised position, and said conductive tab comprises an elastically deformable conductor that is compressed by the bottom edge of said shield whenever said pedestal is in the raised position.