Patent ID: 7132618

Claim:
A plasma reactor for processing a semiconductor workpiece, comprising: a reactor chamber having a chamber wall; a workpiece support within said chamber for holding the semiconductor workpiece; an overhead electrode overlying said workpiece support; a VHF power generator of RF power at a VHF frequency, said VHF power generator being coupled between said workpiece support and said overhead electrode; and a fixed impedance match element comprising: a larger area ground conductor coupled to a return terminal of said VHF power generator and having a cylindrical portion terminated on said chamber wall; a generally elongate smaller area RF conductor adjacent and spaced from said larger area ground conductor and terminated on said overhead electrode; an RF tap at a location on said generally elongate smaller area RF conductor, said location corresponding to at least a near match between an output impedance of said VHF power generator and a characteristic impedance of said fixed impedance match element, said RF tap comprising a coupling between an RF output terminal of said VHF power generator and said generally elongate smaller area RF conductor.