Patent ID: 9543119
Date: 2017-01-10
CPC Classifications: B82Y,G03F,H01J

Claim:
1. A multi charged particle beam writing method comprising: measuring by a detector a current value of a beam group per region of a plurality of regions which are obtained by dividing a multi-beam formation region, for a plurality of beam groups, wherein multiple beams, which respectively have passed through a corresponding opening of a plurality of openings of an aperture member where the plurality of openings are provided to form the multiple beams by being irradiated with a charged particle beam, are separated into the plurality of beam groups, each being per region of the plurality of regions which are obtained by dividing the multi-beam formation region, wherein said detector is arranged at a position lower than said aperture member; leading the beam group to the detector by deflecting collectively the beam group to measure the current value of the beam group, for each of the plurality of beam groups; generating a current distribution of the current value of the beam group of the each region; and judging whether a difference between a current distribution generated last time and the current distribution generated this time is within a tolerance range, wherein, in a case the difference between the current distribution generated last time and the current distribution generated this time is out of the tolerance range, writing is stopped, and in a case the difference between the current distribution generated last time and the current distribution generated this time is within the tolerance range, a pattern is written on a target object by using the multiple beams the currents of which were measured by the detector.