Patent ID: 9570267
Date: 2017-02-14
CPC Classifications: H01J

Claim:
1. A multi charged particle beam writing method comprising: outputting a first ON/OFF control signal for a beam by a first logic circuit for the beam, for each beam in multi-beams of charged particle beam, with respect to each time irradiation of irradiation of a plurality of times, by using a plurality of first logic circuits each respectively outputs a beam ON/OFF control signal to control deflection of a corresponding beam in the multi-beams; outputting a second ON/OFF control signal for a beam, with respect to the each time irradiation of the irradiation of the plurality of times, in addition to switching the first ON/OFF control signal for the each beam by the plurality of first logic circuits, so that the beam is in an ON state during an irradiation time corresponding to irradiation concerned, by using a second logic circuit that collectively outputs a beam ON/OFF control signal to control deflection of a whole of the multi-beams; and performing blanking control so that the beam concerned is in an ON state during an irradiation time corresponding to the irradiation concerned in the case both the first ON/OFF control signal and the second ON/OFF control signal are ON control signals and in an OFF state by deflecting the beam concerned, while the multi-beams are emitted, in all other cases.