Patent ID: 7804579
Filing Date: 2010-09-28
Classification: G03F

Abstract:
1. A control system for controlling a support structure in a lithographic apparatus, said control system comprising: a first measurement system arranged to measure, in a first coordinate system, a position of an object supported by the support structure; a second measurement system configured to measure a position of the support structure in a second coordinate system, the first measurement system having a presumed position in the second coordinate system; and a controller configured to: wherein the controller is further configured to receive a position error signal indicative of a difference between the presumed position and an actual position of the first measurement system in the second coordinate system, and to position the support structure in a manner dependent upon the position error signal, and wherein the controller is further configured to determine the actual position of the first measurement system in the second coordinate system using the presumed position and the position error signal, and is configured to determine the converted position in a manner dependent upon the actual position of the first measurement system and the measured position of the object.