Patent ID: 7385677

Claim:
A lithographic apparatus, comprising: an illumination system that conditions a beam of radiation; a patterning device having an array of individually controllable elements that patterns the beam; a projection system that projects the patterned beam onto a target portion of a substrate; and a controller configured to (a) limit a first portion of the patterning device that is used to generate the patterned beam for a first sub-exposure used to expose a first part of a repeating pattern on the substrate, and (b) limit a second portion of the patterning device that is used to generate the patterned beam for a second sub-exposure used to expose a second part of the repeating pattern on the substrate, wherein a size of the first portion of the patterning device which is used to expose the first part of the repeating pattern is different from a size of the second portion of the patterning device used to expose the second part of the repeating pattern.