Patent ID: 6508885
Filing Date: 2003-01-21
Classification: C23C,Y10S,Y10T

Abstract:
A sealing structure that provides at least part of a connection between a substrate and a chuck body for forming a separately pressurizable region within a low-pressure processing chamber, the substrate having a front surface, a back surface, and a peripheral edge surface interconnecting the front and back surfaces, and said sealing structure comprising:a seal body having two sealing regions; a first of said sealing regions forming a portion of a first seal that engages the peripheral edge surface of the substrate for connecting the seal body to the substrate; a second of said sealing regions forming a portion of a second seal for connecting the seal body at least indirectly to the chuck body; said first sealing region being shaped for alignment with the substrate on the chuck body in response to relative movement between the seal body and the substrate along an axial centerline of the chuck body; said first sealing region forming an incline for guiding the substrate into a desired position on the chuck body in response to the relative movement of the seal body and the substrate along the chuck body axial centerline; and said first sealing region being shaped as a truncated cone for circular substrates.