Patent ID: 6667577
Filing Date: 2003-12-23
Classification: H01J

Abstract:
A plasma reactor for processing a semiconductor workpiece, comprising:a reactor chamber having a chamber ceiling and a chamber side wall and a workpiece support pedestal within the chamber; a gas distribution manifold and gas distribution orifices facing the interior of the chamber and coupled to the process gas conduit; a conductive enclosure outside of the chamber and overlying the ceiling and having a conductive side wall with a bottom edge supported on said chamber ceiling and a conductive ceiling supported on a top edge of said conductive side wall, and a conductive post extending parallel with said conductive side wall from a center portion of said conductive ceiling toward said chamber ceiling; an RF power applicator comprising: (a) a set of inner conductive spokes extending radially outwardly from and electrically connected to said conductive post toward said conductive side wall, (b) a set of outer conductive spokes extending radially inwardly toward said conductive post and from and electrically connected to said conductive side wall, whereby said inner and outer sets of conductive spokes are electrically connected together; an RF source power generator coupled across said RF power applicator; wherein said inner set of spokes are interleaved with said outer set of pokes; wherein said inner and outer sets of spokes are generally co-planar; and wherein said inner and outer sets of spokes are in a plane near the bottom edge of said conductive side wall of said conductive enclosure.