Patent ID: 7511797
Filing Date: 2009-03-31
Classification: G03F

Abstract:
1. A control system configured and arranged to control a lithography system, the control system comprising: a performance prediction unit, configured to predict a performance criterion of the formation of a pattern on a substrate by the lithography system based on an operating condition of the lithography system; a performance measurement unit, configured to measure a performance criterion of the formation of the pattern on the substrate by the lithography system, the measured performance criterion corresponding to the predicted performance criterion; a comparison unit, configured to compare the predicted performance criterion with the corresponding measured performance criterion; and wherein the control system is configured to determine, based upon a difference in the predicted performance criterion and the corresponding measured performance criterion as determined by the comparison unit, which, if any sub-system of the lithography system is not functioning in an expected manner, and the subsequent control of the lithography system is regulated by the difference in the predicted and measured performance criterion determined by the comparison unit.