Patent ID: 7800084

Claim:
A charged-particle beam lithography system in which a region to be patterned is divided into a plurality of frames, a main deflection positions a charged-particle beam to a subfield within the frame, and an auxiliary deflection draws a pattern in units of subfield, the lithography system comprising: a beam optical system including a deflector that deflects the beam; a driver that drives the deflector; and a deflection control portion that controls the driver according to drawing data indicating a pattern to be drawn, the deflection control portion configured to draw a pattern in units of a stripe including a first frame drawing region and a second frame drawing region, the first frame drawing region corresponding to one of the divided frames, and the second frame drawing region being a region moved by a distance C from the first drawing region toward a frame to be drawn next, the deflection control portion configured to control the driver to alternately pattern a first sub-field drawing region in the first frame drawing region and a second sub-field drawing region in the second frame drawing region, and the distance C satisfying a condition 0<C<Ws, where the Ws is a width of the subfield.