Patent ID: 8405819

Claim:
A substrate table for an immersion lithographic apparatus having a projection system to project a patterned beam of radiation onto a substrate, the projection system having an optical axis, wherein the substrate table is configured to support a substrate during exposure and to have an immersion liquid flow off the substrate and over an edge region of the substrate table extending from a substantially flat portion that is substantially perpendicular to the optical axis of the projection system, the edge region having: a first edge profile in a cross-section taken in a first plane passing through the geometric center of the substrate table and perpendicular to a first direction in the plane of the substrate, the first edge profile comprising a curve; and a second edge profile, different to the first edge profile, in a cross-section taken in a second plane passing through the geometric center of the substrate table and perpendicular to a second direction in the plane of the substrate and parallel to the first direction, the second edge profile comprising a curve, wherein the first edge profile is longer than the second edge profile.