Patent ID: 7884551
Filing Date: 2011-02-08
Classification: H01J,H05H

Abstract:
1. An inductively coupling plasma source comprising: a radio frequency source; including a quasi-closed O-type solenoidal inductor comprised of two equal sectioned U-shaped solenoid coil halves separated from one another to form two operating gaps between aligned spaced ends of said solenoid coil halves, each said U-shaped half of said solenoid coil being sectioned to have an electrical midpoint connected to said radio frequency source and distal outer ends of said solenoid coil halves corresponding to said spaced ends of said quasi-closed solenoidal inductor connected to ground; a metallic housing having a discharge chamber therein and two opposed walls having symmetrically opposed bone shaped ports, said ports closed and vacuum sealed with insulating material and each comprising two through side openings dimensionally respectively fitted to and engaged with said spaced ends of said quasi-closed solenoidal inductor and a through slot connecting said side openings along their centerline for inductive excitation and maintenance of plasma in said operating gaps situated within said discharge chamber.