Patent ID: 8336866
Filing Date: 2012-12-25
Classification: H01L

Abstract:
1. A stage for a substrate that is a stage which mounts thereon a substrate that has a concavo-convex portion formed on an underside thereof, wherein: the stage is provided with a flange portion for supporting a peripheral section of a substrate which does not have a circuit formed on the peripheral section, the flange portion having a plurality of through holes formed therein; the stage also includes a concave portion that forms a gap with the underside of the substrate, the concave portion provided on the stage inside of the flange portion; a plurality of substrate positioning pins are formed on and extend upwardly from a top surface of the flange portion at a first radial distance from a center of the stage; and a plurality of lift pins for transferring a substrate pass through the through holes of the flange portion, the lift pins being separate from the substrate positioning pins and disposed at a second radial distance from the center of the stage, said second radial distance being less than said first radial distance; wherein said plurality of substrate positioning pins and said plurality of lift pins contact only an end portion of the substrate; and wherein said plurality of substrate positioning pins and said plurality of lift pins do not contact a portion of the substrate having the circuit formed thereon.