Patent ID: 6573014
Filing Date: 2003-06-03
Classification: B82Y,G03F,G21K,H01J,Y10S

Abstract:
In a method for performing charged-particle-beam (CPB) microlithography in which a region on a pattern-defining reticle, divided into multiple subfields, is illuminated with an illumination beam to produce an image of the illuminated region as projected on a sensitive substrate, a method for exposing the subfields, comprising:(a) dividing each of the subfields into respective groups of multiple subregions such that each subfield comprises at least two respective subregions; (b) directing an illumination beam in sequence to each of the groups; and (c) at each group, directing the illumination beam to expose the respective subregions in the group in a predetermined order before directing the illumination beam to a subsequent group.