Patent ID: 9202674
Filing Date: 2015-12-01
Classification: C23C,H01J

Abstract:
1. A plasma reactor for processing a workpiece, comprising: a cylindrical side wall; a ceiling, said ceiling comprising a gas distribution showerhead, said showerhead comprising a conductive electrode insulated from said side wall; a power source coupled to said conductive electrode; an electrically insulating hollow tube, said tube having a pair of ends, said tube being supported at one of said ends over said cylindrical side wall and being supported at the other of said ends over said electrode; a set of conductive rings on and surrounding said tube and spaced from one another along the length of said tube; plural electrically resistive elements, each of said resistive elements comprising a pair of connectors comprising wire conductors, respective ones of said resistive elements connected at their connectors between respective pairs of said rings to form a series resistor assembly having a pair of ends, the connector at one of said ends being coupled to the electrical potential of said side wall, and the connector at the other one of said ends being coupled to the electrical potential of said ceiling electrode; and a side wall manifold comprising a first sealing face having a gas supply port connected to said one end of said hollow tube, and a ceiling manifold comprising a second sealing face having a gas receiving port connected to said other end of said hollow tube, said gas receiving port being in communication with said gas distribution showerhead.