Patent ID: 6429441
Filing Date: 2002-08-06
Classification: B82Y,H01J

Abstract:
A charged-particle-beam (CPB) optical system for use in a CPB microlithography apparatus, the CPB optical system comprising along an optical axis:an illumination-optical system situated and configured to receive an illumination charged particle beam from a CPB source and direct the illumination beam to a region on a reticle, defining a pattern to be microlithographically transferred to a substrate, so as to illuminate the region on the reticle and produce a patterned beam propagating downstream of the illuminated region on the reticle; a projection-optical system situated and configured to receive the patterned beam from the illuminated region on the reticle and to project the patterned beam to a respective region on the substrate; a first beam-decelerating electric field situated between the reticle and the projection-optical system; and a second beam-decelerating electric field situated between the projection-optical system and the substrate.