Patent ID: 10790115

Abstract:
A multi charged particle beam writing method includes assigning, for each unit irradiation region per beam of multi-beams, each divided shot obtained by dividing a shot of a maximum irradiation time and continuously irradiate the same unit irradiation region, to at least one of a plurality of beams that can be switched by collective deflection; calculating, for each unit irradiation region, an irradiation time; determining, for each unit irradiation region, whether to make each divided shot be beam “on” or “off” so that the total irradiation time for a plurality of corresponding divided shots to be beam “on” may become a combination equivalent to the irradiation time calculated; and applying, to the corresponding unit irradiation region, the plurality of corresponding divided shots to be beam “on”, using the plurality of beams while switching a beam between beams by collective deflection.