Patent ID: 7804581
Filing Date: 2010-09-28
Classification: G03B,G03F

Abstract:
1. An exposure apparatus for exposing a substrate to light during an exposure period, said apparatus comprising: a projection optical system configured to project light from a pattern of a reticle onto the substrate, said projection optical system including at least one optical element driven to adjust aberration of said projection optical system; a first calculator configured to calculate compensation data based on a temporal characteristic of heat influence, which represents a change in aberration due to heat influence of the exposure in said 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 configured to calculate 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; and a driver configured to drive the at least one optical element a plurality of times during the non-exposure period based on each of the plurality of driving amounts calculated by the second calculator.