Lithographic apparatus, device manufacturing method, and a projection element for use in the lithographic apparatus
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United States of America Patent
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Jan 6, 2009
Grant Date -
May 25, 2006
app pub date -
Nov 22, 2004
filing date -
Nov 22, 2004
priority date (Note) -
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Abstract
A lithographic apparatus, a device manufacturing method, and a projection element for use in a lithographic apparatus are disclosed. The lithographic apparatus has a radiation system for providing a pulsed beam of radiation, a patterning device for imparting the beam with a pattern to form a patterned radiation beam, and a projection system having a projection element for projecting the patterned beam onto a target portion of a substrate. The apparatus further comprises an actuator for moving the projection element for shifting the patterned beam that is projected onto the substrate during at least one pulse of the radiation system. This can be done to compensate for a positional error between a substrate table holding the substrate and an aerial image of the projection system. The positional error could occur due to mechanical vibrations in the frame system of the lithographic apparatus.
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