Patent ID: 9147552
Filing Date: 2015-09-29
Classification: H01J

Abstract:
1. A charged particle beam writing method comprising: virtually dividing a writing region of a target object into a plurality of strip-shaped stripe regions; calculating one of a total area of a pattern assigned to a stripe region concerned and a number of shots of a charged particle beam for writing the pattern assigned to the stripe region concerned, for each stripe region of the plurality of stripe regions; determining whether a difference between the one of the total area of the pattern and the number of shots with respect to one of adjacent stripe regions of the plurality of stripe regions and the one of the total area of the pattern and the number of shots with respect to an other of the adjacent stripe regions exceeds a corresponding threshold value; re-dividing, in a case where the difference exceeds the corresponding threshold value as a result of the determining, a stripe region whose one of the total area of the pattern and the number of shots is larger than that of an other stripe region in the adjacent stripe regions so that the difference of the one of the total area of the pattern and the number of shots becomes lower than or equal to the corresponding threshold value; and writing a pattern, with a charged particle beam, in the plurality of stripe regions including the stripe region having been re-divided, in a writing order of arrangement of the plurality of stripe regions.