Patent ID: 9679748
Date: 2017-06-13
CPC Classifications: H01J

Claim:
1. A multi charged particle beam writing apparatus comprising: a dividing processing circuitry configured to input, for each beam irradiation position, first irradiation time data for k passes defined by n (n is an integer greater than or equal to 2) bits, and divide the first irradiation time data for the k passes into k pieces of second irradiation time data, where each of the k pieces of the second irradiation time data has a different number of bits from each other which has been preset and a total of different numbers of bits is n-bits, in multi-pass writing of k (k is an integer greater than or equal to 2) passes or greater than the k passes by using multi charged particle beams; a storage device configured to store k pieces of resolution information each defined based on a corresponding number of bits used in the k pieces of the second irradiation time data; a data transmission processing circuitry configured to transmit, for each pass of the k passes, corresponding second irradiation time data in the k pieces of the second irradiation time data, for a beam concerned in the multi charged particle beams; a resolution information transmission processing circuitry configured to transmit, for the each pass of the k passes, corresponding resolution information in the k pieces of the resolution information; an irradiation time calculation processing circuitry configured to input, for the each pass of the k passes, transmitted second irradiation time data and resolution information, and calculate an irradiation time of a corresponding beam in the multi charged particle beams of a pass concerned by using input second irradiation time data and resolution information; and a writing mechanism configured to write, for the each pass of the k passes, a pattern on a target object by using the multi charged particle beams including the corresponding beam of a calculated irradiation time.