Patent ID: 7561251

Claim:
A device manufacturing method, comprising: emitting a beam of radiation using an illumination system; imparting to the beam a pattern in its cross section; projecting the patterned beam of radiation onto a target portion of a surface of a substrate; measuring a first respective temperature of a first plurality of regions in the target portion of the substrate; measuring a second respective temperature of a second plurality of regions in the target portion of the substrate; calculating a dimensional response from differences between measurements of the first and the second respective temperatures of the first and the second plurality of regions of the substrate; and concurrently adjusting, in real time, one or more spatial characteristics of the patterned beam relative to a substrate support to compensate for the calculated dimensional response, wherein the spatial characteristics comprise a cross-sectional shape of the patterned beam, a position of the patterned beam, and a size of the patterned beam.