Patent ID: 8634062
Filing Date: 2014-01-21
Classification: G03F

Abstract:
1. A lithographic apparatus comprising: a radiation beam conditioning system configured to condition a beam of radiation, wherein the radiation beam conditioning system comprises an optical element and an actuator system arranged to control a position of the optical element, the actuator system comprising: first and second actuating elements, each having a first end connected to a base of the actuator system and a second end connected to the optical element, the first actuating element comprising first and second sections of material that are joined to each other with both sections extending from the first end to the second end of the first actuating element, and the second actuating element comprising third and fourth sections of material that are joined to each other with both sections extending from the first end to the second end of the second actuating element, and at least one power supply, configured to provide heat to the first and second actuating elements, the at least one power supply controlling the heat provided to the first actuating element independently from the heat provided to the second actuating element, wherein: a patterning device configured to pattern the conditioned beam of radiation; and a projection system configured to project the patterned beam of radiation onto a substrate.