Patent ID: 11860554
Assignee: ASML NETHERLANDS B.V.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. A lithographic apparatus, comprising:
a support constructed to support a patterning device, the patterning device being capable of imparting a radiation beam with a pattern in its cross-section to form a patterned radiation beam;
a projection system configured to project the patterned radiation beam onto a substrate;
a wafer stage having a substrate support surface configured to engage at least a part of the substrate, the substrate support surface having a support surface temperature; and
a thermal device configured to change a shape of at least a portion of the object by provision of the at least portion of the substrate with a substrate temperature, which substrate temperature differs from a support surface temperature of the object support surface by a predetermined temperature difference and wherein the shape is of a cross-section of the object in a direction non-parallel to a main surface of the object.