Patent ID: 9482967
Filing Date: 2016-11-01
CPC Classification: G03F

Claim Text:
1. A lithographic apparatus arranged to project a pattern from a patterning device onto a substrate using a projection system, the apparatus comprising: a liquid supply system configured to provide a space between the projection system and the substrate with a liquid; a measurement system configured to measure an effect associated with a temperature fluctuation of the liquid; a prediction system configured to predict an effect associated with a temperature fluctuation of the liquid, the prediction system comprising a model system configured to predict a variation in the temperature of the liquid; and a control system configured to adjust a parameter of the lithographic apparatus to control the effect measured by the measurement system and/or the effect predicted by the prediction system or another effect associated with the temperature of the liquid, on the basis of a prediction obtained by the prediction system and a measurement obtained by the measurement system, wherein the control system is configured to provide a feedforward control on the basis of the prediction obtained by the prediction system and to trigger a feedback measurement when the feedforward control exceeds a limit.