Patent ID: 8692218
Filing Date: 2014-04-08
Classification: B82Y,H01J

Abstract:
1. An apparatus for drawing a pattern on a substrate with a charged particle beam, the apparatus comprising: an optical system; a detector including a shielding member, having an edge, for shielding the charged particle beam and configured to detect the charged particle beam without being shielded by the shielding member; and a controller configured to cause, in accordance with each of a plurality of dose value sets respectively corresponding to a plurality of target line widths in a predetermined direction, the optical system to draw a pattern on the detector with the charged particle beam with respect to each of a plurality of relative positions between the pattern and the detector in the predetermined direction, to cause the detector to detect an amount of the charged particle beam with respect to each of the plurality of relative positions, to attain a change in the detected amount with each change in the plurality of relative positions with respect to each of the plurality of dose value sets to obtain a line width corresponding to each of the plurality of dose value sets, and to calibrate the plurality of dose value sets based on the plurality of target line widths and the obtained line widths corresponding thereto.