Patent ID: 7205540
Filing Date: 2007-04-17
Classification: B82Y,G01N,G01R,H01J

Abstract:
1. An electron beam apparatus for irradiating a sample formed with a pattern with an electron beam to evaluate the sample, said apparatus comprising: an electron-optical column for accommodating an electron beam source, an objective lens, separator, and a secondary electron beam detector; a stage for holding said sample and for relatively moving said sample with respect to said electron-optical column; a working chamber for accommodating said stage, said working chamber being capable of controlling the interior thereof in a vacuum atmosphere; a loader for supplying said sample to said stage in said working chamber; a voltage applying mechanism for applying a voltage to said sample placed in said working chamber; and an alignment mechanism for measuring a direction in which dies are arranged on said sample, wherein said sample includes a plurality of small regions which are divided such that said regions are underlapped so that irradiated portions in each said small region do not overlap even if there is any distortion in field of sight or any error in irradiated position.