Patent ID: 8920107
Filing Date: 2014-12-30
Classification: B25J,H01L,Y10S

Abstract:
1. A substrate support apparatus which can support a substrate having a center hole, comprising: a support portion which can support the substrate, wherein said support portion includes a support groove with a cross-sectional shape in which a groove width gradually increases in a counter-gravitational direction, wherein a width of said support groove at two end portions of a longitudinal direction is larger than a width of said support groove at the center of a longitudinal direction thereof, wherein the support groove is formed in an arc which is convex in the counter-gravitational direction, and a curvature radius of the arc is larger than a curvature radius of the center hole in the substrate, and wherein both wall surfaces of the support groove are configured to contact the substrate at four positions located between the center of the longitudinal direction of the support groove and the two end portions of the longitudinal direction of the support groove.