Patent ID: 9340866
Filing Date: 2016-05-17
CPC Classification: C23C,H01J

Claim Text:
1. A substrate support for use in a physical vapor deposition chamber, comprising: a dielectric member having a surface to support a substrate thereon; a one or more first conductive members disposed below the dielectric member and having a dielectric member facing surface adjacent to the dielectric member; an annular second conductive member disposed about and contacting the one or more first conductive members such that RF energy provided to the substrate by an RF source returns to the RF source via an RF return path by traveling radially outward from the substrate support along the dielectric member facing surface of the one or more first conductive members and along a first surface of the second conductive member disposed substantially parallel to a peripheral edge surface of the one or more first conductive members after travelling along the dielectric member facing surface; and a plurality of conductive elements disposed about and contacting the second conductive member, wherein the plurality of conductive elements extend above a surface of the second conductive member such that the plurality of conductive elements selectively contact a shield disposed above the substrate support to complete the RF return path dependent upon a position of the substrate support, and wherein the plurality of conductive elements are axisymmetrically disposed about the substrate support.