Lithographic apparatus
Abstract:
A lithographic apparatus includes a patterning device support to support a patterning device to form a patterned radiation beam, the patterning device support including a moveable structure movably arranged with respect to an object, a patterning device holder movably arranged relative to the movable structure and holding the patterning device, an actuator to move the movable structure relative to the object, and an ultra short stroke actuator to move the patterning device holder relative to the movable structure; a substrate support to hold a substrate; and a projection system to project the patterned radiation beam onto the substrate, a position measurement system for measuring a substrate positional error which is a difference between a desired position and an actual position of the substrate relative to a reference object; and a controller to move the actuator and the ultra short stroke actuator based on the substrate positional error.
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