Exposure apparatus and method of manufacturing device
AssigneeCanon Kabushiki Kaisha
InventorsYoshinori Uchida, Yoshiyuki Okada
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AssigneeCanon Kabushiki Kaisha
InventorsYoshinori Uchida, Yoshiyuki Okada
Estimating the term…
An exposure apparatus for exposing a substrate to light during an exposure period. A projection optical system projects light from a pattern of a reticle onto the substrate. The projection optical system includes at least one optical element driven to adjust aberration of the projection optical system. A first calculator calculates compensation data based on a temporal characteristic of heat influence, which represents a change in aberration due to heat influence of the exposure in the projection optical system in accordance with (i) an elapsed time of a non-exposure period from a time when the exposure period shifts to a non-exposure period, and (ii) exposure period data which represents the time when the exposure period shifts to the non-exposure period. A second calculator calculates each of a plurality of driving amounts of the at least one optical element, based on the compensation data calculated by the first calculator, and each of a plurality of timing signals generated at a gradually decreasing interval upon a shift from the exposure period to the non-exposure period, on the basis of the exposure period data. A driver drives the at least one optical element during the non-exposure period based on each of the plurality of driving amounts calculated by the second calculator.
An exposure apparatus for exposing a substrate to light during an exposure period, said apparatus comprising:
Dependencies are inferred from the claim text.