Patent ID: 8216422

Claim:
A method for processing a substrate, comprising: moving two or more support pins within respective roller bushings supported by a support pedestal in a process chamber; contacting a substrate to be processed in the processing chamber with a first end of the two or more support pins; raising the support pedestal to engage the substrate on an upper surface of the support pedestal while the substrate is supported on the support pins; raising the support pedestal to a processing position wherein a second end of the support pins are disengaged from a bottom surface of the processing chamber; processing the substrate; lowering the support pedestal to engage the second end of the support pins with the bottom surface; and contacting the substrate with the first end of the support pins to lift the substrate away from the upper surface of the support pedestal, wherein each of the roller bushings comprise a housing having a bore formed therethrough supporting a plurality of roller elements, wherein at least a portion of the plurality of roller elements axially support the support pin that is at least partially disposed within the bore, and four windows formed therethrough at a first end thereof and four windows formed therethrough at a second end thereof, each window having one of the roller elements at least partially disposed therein.