Patent ID: 9082588
Filing Date: 2015-07-14
Classification: B82Y,G03F,H01J

Abstract:
1. A multi charged particle beam writing apparatus comprising: a stage configured to mount a target object thereon and be movable continuously; an emission unit configured to emit a charged particle beam; an aperture member, in which a plurality of openings are formed, configured to form multiple beams by letting a region including a whole of the plurality of openings be irradiated with the charged particle beam and letting parts of the charged particle beam respectively pass through a corresponding opening of the plurality of openings; a plurality of first deflectors configured to respectively perform blanking deflection of a corresponding beam in the multiple beams having passed through the plurality of openings of the aperture member; a second deflector configured to collectively deflect the multiple beams having passed through the plurality of openings of the aperture member so that the multiple beams do not reach the target object; a blanking aperture member configured to block each beam that has been deflected to be in an off state by the plurality of first deflectors; and a current detector, arranged at the blanking aperture member, configured to detect a current value of all beams in an on state in the multiple beams that have been deflected by the second deflector.