Patent ID: 7264688

Claim:
A plasma reactor for processing a workpiece, comprising: an enclosure forming a reactor chamber and a workpiece support within said chamber, said enclosure including a ceiling facing said workpiece support; a toroidal plasma source comprising a hollow reentrant conduit external of said chamber and having a pair of ends connected to the interior of said chamber and forming a closed toroidal path extending through said conduit and across a diameter of said workpiece support, and an RF power applicator adjacent a portion of said reentrant external conduit; an RF power generator coupled to the RF power applicator of said toroidal plasma source; a capacitively coupled plasma source power applicator comprising a source power electrode at one of: (a) said ceiling (b) said workpiece support, and a VHF power generator coupled to said capacitively coupled source power applicator; a plasma bias power applicator comprising a bias power electrode in said workpiece support; at least a first RF bias power generator coupled to said plasma bias power applicator; process gas distribution apparatus comprising a gas distribution showerhead in said ceiling; a vacuum pump for evacuating said chamber; and a first controller for adjusting relative amounts of power simultaneously coupled to plasma in said chamber and conduit by said toroidal plasma source and said capacitively coupled plasma source power applicator.