Patent ID: 8766216
Filing Date: 2014-07-01
Classification: B82Y,H01J

Abstract:
1. A drawing apparatus for performing drawing on a substrate with charged particle beams, the apparatus comprising: a charged particle optical system configured, letting m, n, and i be natural numbers, letting M be a natural number not less than m, and letting N be a natural number not less than n, to generate M×N charged particle beams arranged such that M rows, each including N charged particle beams arranged at a first pitch along a first direction, exist at a second pitch along a second direction perpendicular to the first direction, a position, in the first direction, of a charged particle beam at a start of each row shifts by 1/m the first pitch in first to mth rows out of the M rows, and a position, in the first direction, of a charged particle beam at a start of an (m+i)th row is the same as a position, in the first direction, of a charged particle beam at a start of an ith row; a substrate stage configured to hold the substrate and to be moved along the second direction; a limiting device configured to limit number of charged particle beams that the charged particle optical system emits toward the substrate; and a controller configured, if an abnormal beam that does not satisfy a use condition is present among the M×N charged particle beams, to control the limiting device such that only m rows, successive along the second direction, are usable, each of the m rows including n charged particle beams that are successive without intervention of the abnormal beam.