Patent ID: 9018602
Filing Date: 2015-04-28
Classification: H01J

Abstract:
1. A charged particle beam writing apparatus comprising: a dose calculation unit configured to calculate, for each of a plurality of first small regions made by virtually dividing a writing region of a target object to be mesh-like regions each having a size larger than an influence radius of forward scattering of a charged particle beam, a dose of the charged particle beam which is shot in a first small region concerned of the plurality of first small regions, by using a dose formula that is different depending on a shot type classified by whether a shot figure formed by a shot of the charged particle beam is at an edge of a figure pattern or inside the figure pattern in the first small region concerned, wherein in case that a shot figure at the edge of the figure pattern and a shot figure inside the figure pattern are arranged in the same first small region, one of dose formulas is used for the shot figure at the edge of the figure pattern in the same first small region, and another one of dose formulas is used for the shot figure inside the figure pattern in the same first small region; and a writing unit configured to write, for the each of the plurality of first small regions, the figure pattern by irradiating a first small region concerned with each shot of the charged particle beam with a dose calculated by the dose formula being different depending on the shot type.