Patent ID: 8317970

Claim:
A plasma reactor comprising: a cylindrical side wall and a ceiling electrode enclosing a chamber, an insulator ring between said cylindrical side wall and said ceiling electrode, and a workpiece support pedestal inside said chamber and having a workpiece support surface facing said ceiling electrode and defining a processing zone between said support surface and said ceiling electrode; a first RF power generator coupled to said ceiling electrode; said ceiling electrode comprising a gas distribution plate, said gas distribution plate comprising: a metallic body having a bottom surface facing said workpiece support surface; plural gas disperser orifices in said bottom surface; an internal gas manifold within said gas distribution plate and coupled to said plural gas disperser orifices; an array of discrete RF power applicators in said gas distribution plate, said discrete RF power applicators being located in different zones, each one of said RF power applicators comprising: (a) an insulating cylindrical housing extending through said gas distribution plate, a portion of said housing extending through said internal gas manifold and through said bottom surface and into said processing zone; (b) a conductive solenoidal coil contained within said housing, a portion of the coil lying within the portion of the housing that extends through said bottom surface into said processing zone; and a plurality of second RF power generators, respective ones of said second RF power generators being coupled to respective ones of the conductive solenoidal coils of respective ones of respective ones of said different zones.