Patent ID: 7977018

Claim:
A method for preparing exposure data for charged particle beam exposure in which an exposure object is exposed by a charged particle beam, the method comprising: dividing a first pattern which is included in the exposure object into second patterns; classifying the second patterns in terms of linewidth; setting a standard characteristic indicating a relationship between a standard dose of the charged particle beam and a resultant linewidth of a standard resist pattern, the standard resist pattern having the resultant linewidth being in accordance with patterns which are obtained by exposing the classified second patterns in terms of linewidth to the charged particle beam with the standard dose; determining a characteristic indicating a relationship between a dose of the charged particle beam and a linewidth of a resist pattern, the resist pattern having the linewidth being obtained by exposing one of the classified second patterns in terms of linewidth to the charged particle beam with the dose; correcting a linewidth of the one of the classified second patterns in terms of linewidth so that the characteristic follows the standard characteristic; and preparing exposure data for a final dose of the charged particle beam to expose the classified second patterns to get a resist pattern having a target linewidth in accordance with the standard characteristic.