Patent ID: 6541169
Filing Date: 2003-04-01
Classification: B82Y,H01J,Y10S

Abstract:
A method for performing a microlithographic transfer of a pattern onto a sensitive exposure surface of a substrate, mounted on a movable substrate stage, using a charged particle beam, the method comprising:(a) exposing the substrate, mounted on the substrate stage, with multiple successive shots of a charged-particle patterned beam onto respective specific locations on the exposure surface while moving the substrate stage and deflecting the patterned beam to the respective specific locations, so as to imprint the exposure surface with the pattern; (b) while performing step (a), during the shots, applying respective amounts of deflection-aberration correction as the patterned beam is deflected to the respective specific locations; and (c) in a given shot in which deflection of the patterned beam has changed from a previous position, updating the amount of the correction so as to apply an appropriate deflection-aberration correction for the given shot.