Patent ID: 9449794
Filing Date: 2016-09-20
CPC Classification: C23C,H01J,H05H

Claim Text:
1. A plasma reactor comprising: a window assembly; first and second coil antennas adjacent said window assembly, said first coil antenna comprising a first layer of parallel spiral conductors, each of said parallel spiral conductors comprising first and second ends; a first current distributor coupled to the first ends of the parallel spiral conductors of said first layer; a conductive ground plate in a plane overlying said first current distributor; and a first radial conductive feed rod lying in a plane above said conductive ground plate and having an inner end coupled to said first current distributor and an outer end comprising a first RF feed terminal; wherein said first current distributor comprises: a first conductive spider lying in a plane above said first and second coil antennas, and a plurality of axial posts connected between a peripheral annular zone of said first conductive spider and said first ends of first layer of parallel spiral conductors.