Patent ID: 9385017
Filing Date: 2016-07-05
CPC Classification: C23C,H01L

Claim Text:
1. An apparatus for use in the plasma processing of a first workpiece and a second workpiece having different diameters, the apparatus comprising: an electrode including a pedestal portion configured to support the first workpiece or the second workpiece; and a lift plate having an outer perimeter, an opening inside of said outer perimeter, a first rim surrounding said opening and configured to support the first workpiece, and a second rim surrounding said opening and configured to support the second workpiece, said first rim having an inner diameter, said second rim having an inner diameter that is greater than said inner diameter of said first rim, and said pedestal portion of said electrode fitting within said opening in said lift plate, said lift plate is adapted to move relative to said pedestal portion between A) a raised position where either the first workpiece or the second workpiece is in contact with and supported by either the first rim or the second rim, respectively, and B) a lowered position where the pedestal portion is within said opening in said lift plate and either the first workpiece is transferred from said first rim or the second workpiece is transferred from said second rim to said pedestal portion of said electrode, such that either the first workpiece or the second workpiece is not in contact with the first rim or the second rim, respectively.