Patent ID: 8610082
Filing Date: 2013-12-17
Classification: B82Y,H01J

Abstract:
1. A drawing apparatus configured to perform drawing on a substrate with a plurality of charged particle beams, the drawing apparatus comprising: an irradiation optical system including a collimator lens on which a diverging charged particle beam is incident; an aperture array configured to split the charged particle beam from the irradiation optical system into a plurality of charged particle beams; a converging lens array configured to form a plurality of crossovers of the plurality of charged particle beams from the aperture array; and a projection optical system including an element in which a plurality of apertures corresponding to the plurality of crossovers are formed, and a plurality of projection lenses corresponding to the plurality of apertures and configured to project charged particle beams from the plurality of apertures onto the substrate, wherein the converging lens array includes converging lenses disposed such that each of the plurality of crossovers, which are formed by the converging lenses from the charged particle beam incident on the aperture array at incidence angles associated with aberration of the irradiation optical system, is aligned with corresponding one of the plurality of apertures in the element, and the converging lenses include a converging lens eccentric relative to corresponding one of the plurality of apertures in the element.