Patent ID: 8563953

Claim:
A charged particle beam writing apparatus comprising: a total charge amount calculation unit configured to calculate a total charge amount of charged particle beams irradiating each minimum deflection region in deflection regions having different deflection sizes respectively deflected by deflectors of a plurality of levels for deflecting charged particle beams; a representative temperature calculation unit configured to calculate a representative temperature of the each minimum deflection region based on heat transfer from other minimum deflection regions having been written before the each minimum deflection region is written; a dose modulation unit configured to input a first dose of a shot of each charged particle beam irradiating the each minimum deflection region, and to modulate the first dose by using the representative temperature of the each minimum deflection region; and a writing unit configured to include the deflectors of a plurality of levels and to write a pattern in the each minimum deflection region with a second dose, which has been modulated, by using the deflectors of a plurality of levels.