Patent ID: 9203200
Filing Date: 2015-12-01
Classification: C23C,H01J,H01R

Abstract:
1. A coupling for conveying a bias voltage to a rotating platen supported within an enclosed vacuum chamber, the coupling comprising: an electrically conductive bearing cup, said bearing cup axially secured at a base to said rotating platen for rotation therewith, the rotating platen being supported within the enclosed vacuum chamber, and the bearing cup having an annular sidewall extending axially from said base into an axial bore of a rotating platen adapter; a stationary electrically conductive rod coaxially disposed within the axial bore of the rotating platen adapter, said electrically conductive rod coupled to an external source of bias voltage and extending coaxially within said bearing cup annular sidewall; an electrically conductive bearing fitted within said bearing cup, said bearing having an outer race with an outer diameter electrically coupled to said bearing cup, an inner race with an inner diameter fitted to said electrically conductive rod, and a plurality of electrically conductive rolling elements disposed between said inner race and said outer race; and wherein said rod, said bearing, and said bearing cup define a pathway for the delivery of the bias voltage from said external source to said rotating platen.