Patent ID: 7158211
Filing Date: 2007-01-02
Classification: G03F

Abstract:
1. A lithographic apparatus, comprising: a support configured to hold a patterning device, the patterning device configured to impart a beam of radiation with a pattern; a projection system configured to project the patterned beam of radiation onto a substrate; a table having a clamping surface, the clamping surface having one or more projections configured to support the substrate when clamped thereto; and a pump configured to pump a liquid through a space between the clamping surface and the substrate, so that when liquid is pumped through the space, the liquid in the space is at a lower pressure than fluid on an other side of the substrate such that a net force is exerted on the substrate to hold it on the clamping surface, wherein, during use, a level of the liquid is maintained to at least a lower surface of the substrate around at least part of a periphery of the substrate.