Patent ID: 11869746
Assignee: NUFLARE TECHNOLOGY, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A multi-beam writing apparatus for irradiating each pixel of a plurality of pixels defined on a substrate, placed on a stage, with a beam of a multi-beam to form a pattern, the apparatus comprising:
a position correction circuit obtaining a corresponding position correction amount of the pattern for each of a plurality of sub-arrays, based on a positional deviation amount of each beam for each of the sub-arrays, the plurality of sub-arrays being determined by dividing an array of the multi-beam at least in a predetermined direction, each of the sub-arrays including a plurality of beams;
a dose calculation circuit calculating a dose of the each beam for shifting a position of the pattern to be drawn by each of the sub-arrays based on the corresponding position correction amount for each of the sub-arrays;
a dose controller controlling the each beam of the multi-beam so as to have the calculated dose; and
a writer including the stage, irradiating the substrate with the multi-beam, and performing multi-writing on the substrate using at least a portion of each of the sub-arrays with the controlled dose wherein the position correction circuit obtains an area density distribution of the pattern corresponding to each of the sub-arrays,
Obtains a dose distribution for each of the sub-arrays from the area density distribution, and shifts the dose distribution based on the position correction amount, and
Calculates the dose of each beam with which the pixel corresponding to the pattern is irradiated.