Abstract:
An exposure apparatus (1) including a projection system (12, 14) configured to project a plurality of radiation beams onto a target; a movable frame (8) that is at least rotatable around an axis (10); and an actuator system (11) configured to displace the movable frame to an axis away from an axis corresponding to the geometric center of the movable frame and to cause the frame to rotate around an axis through the center of mass of the frame.
Abstract:
Disclosed is a system configured to project a beam of radiation onto a target portion of a substrate within a lithographic apparatus. The system comprises a mirror having an actuator for positioning the mirror and/or configuring the shape of the mirror, the actuator also providing active damping to the mirror, and a controller for generating actuator control signals for control of said actuator(s). A first coordinate system is used for control of said actuator(s) when positioning said mirror and/or configuring the shape of said mirror and a second coordinate system is used for control of said actuator(s) when providing active damping to said mirror.
Abstract:
A lithography apparatus and device manufacturing methods are disclosed. A lithography apparatus includes a support stage (16), and a measurement system (12-14) including a sensor part (13) and a reference part (12, 14), the measurement system being configured to determine the position and/or orientation of the support stage (16), or of a component mounted on the support stage, relative to a reference frame (6, 8, 10) by using the sensor part (13) to interact with the reference part (12, 14), wherein: the reference frame (6, 8, 10) comprises N sub-frames (6, 8) coupled together so as to behave predominantly as a single rigid body with respect to vibrations below a first reference frequency and predominantly as an N-body system with respect to vibrations above a second reference frequency, where N is an integer greater than 1.
Abstract:
A projection system (PS) is provided that includes a sensor system (20) that measures at least one parameter that relates to the physical deformation of a frame (10) that supports the optical elements (11) within the projection system (PS), and a control system (30) that, based on the measurements from the sensor system (20.), determines an expected deviation of.the position of the beam of radiation projected by the projection system (PS) that is caused by the physical deformation of the frame (10).