Patent ID: 9612530
Date: 2017-04-04
CPC Classifications: G03F,G06F,H01J

Claim:
1. A method for fracturing or mask data preparation comprising: inputting an original set of shots for a multi-beam charged particle beam writer, wherein each multi-beam shot in the original set of shots comprises at least one beamlet; and dosages for the original set of shots have not been corrected for long-range effects; calculating an edge slope of a pattern produced on a resist-coated surface by the original set of shots; identifying an edge of the pattern which has an edge slope below a target level; increasing the dosage of a beamlet in a shot in the original set of shots to improve the edge slope of the edge that has the edge slope below the target level, wherein the improved edge slope is closer to, without exceeding, the target level, wherein the resist comprises a resist threshold, and wherein the edge slope comprises a slope of the dosage, at the resist threshold, with respect to a linear dimension perpendicular to the edge of the pattern; and outputting a revised set of shots to the multi-beam charged particle beam writer, wherein the revised set of shots revises the original set of shots with the increased dosage of a beamlet in a shot in the original set of shots.