Patent ID: 7459705

Claim:
A charged particle beam exposure method of a character projection system, comprising: preparing an aperture mask having a plurality of character apertures; correcting dimensions of designed patterns in design data in consideration of at least one of a forward scattering distance of a charged particle, a rearward scattering distance of the charged particle, a blurring of a beam of the charged particle, a distance by which an underlayer provided under a resist is influenced by a diffusion of an acid in the resist to be exposed to the beam of the charged particle, and a dimension conversion difference of the designed patterns due to a denseness/coarseness difference of the designed patterns caused when the underlayer is processed while using the resist as a mask; allocating at least a part of a specified character aperture of the plurality of character apertures of the aperture mask to the corrected designed patterns to produce writing data; and exposing the resist to the beams of the charged particle passed through the at least a part of the specified character aperture based on the writing data.