Patent ID: 7830493
Filing Date: 2010-11-09
Classification: G03F

Abstract:
1. A lithographic apparatus, comprising: a modulation system configured to emit a modulated radiation beam; a projection system configured to project the modulated radiation beam onto a target portion of a substrate; a substrate position controller configured to move the substrate relative to the projection system; a temperature measurement system configured to measure a temperature of the projection system; a substrate-position-based expansion-compensator coupled to the substrate position controller and together configured to modify a position of the substrate relative to the projection system based on measurements from the temperature measurement system; and a conversion system configured to convert a first representation of a desired dose pattern into a control signal configured to control the modulation system, the conversion system comprising a control-signal-based expansion-compensator configured to adapt the control signal to at least partially compensate for thermal expansion of the projection system and the substrate by generating a compensated dose pattern produced by the modulation system.