Patent ID: 9618858
Date: 2017-04-11
CPC Classifications: G03F,H01L,Y10T

Claim:
1. An immersion lithographic apparatus, comprising: a substrate table including a recess having a central support section configured to support a substrate, the central support section having a support surface to support a bottom surface of the substrate, having a lateral surface at a non-zero angle to the support surface, and having a bottom surface at a non-zero angle to the lateral surface and facing away from the support surface, the lateral surface extending to the bottom surface of the central support section; a drain in the substrate table, the drain configured to receive an immersion fluid which leaks, in use, into a gap between an edge of the substrate on the substrate table and an edge of the recess, the drain having an orifice above the bottom surface of the central support section; a peripheral section of the substrate table that surrounds the central support section, the drain located in the peripheral section and wherein at least a majority of the height of the lateral surface of the central support section is spaced by an open gap from at least a majority of the height of a lateral surface of the peripheral section, the lateral surface of the peripheral section faces the lateral surface of the central support section, and the open gap extends around the central support section and is outward, in a horizontal direction, of an outer periphery of the bottom surface of the substrate, wherein an uppermost surface of the peripheral section adjacent the substrate is generally coplanar with an upper surface of the substrate, and an edge of the peripheral section defines the edge of the recess; and a thermal conditioning system configured to thermally condition at least the central support section.