Patent ID: 9748074
Date: 2017-08-29
CPC Classifications: H01J

Claim:
1. An energy beam writing apparatus comprising: a writing section configured to write a pattern by irradiating an object with an energy beam; and a control calculating section configured to control the writing section, wherein the control calculating section includes a data generating section that generates shot data including a third irradiation amount and includes a target irradiation amount calculating section configured to calculate a first irradiation amount of a beam in each pixel of a plurality of pixels on the object, each pixel being an area onto which one beam is applied, based on writing data, an irradiation amount rounding section configured to round the first irradiation amount based on a predetermined irradiation amount control unit and calculate a second irradiation amount with respect to each pixel, a difference calculating section configured to calculate a first difference that is a difference between the first irradiation amount and the second irradiation amount with respect to each pixel, a difference sum calculating section configured to calculate a sum of the first differences in a first group of a plurality of adjacent pixels, and an allocating section configured to allocate an irradiation amount based on the irradiation amount control unit and the sum of the first differences to a pixel in the first group and calculate the third irradiation amount in each pixel, and a writing control section that controls the writing section based on the shot data.