Patent ID: 8525127
Filing Date: 2013-09-03
Classification: G01R,H01J

Abstract:
1. An inspection apparatus for inspecting a pattern formed in a sample by using an electron beam, characterized in comprising: a holding mechanism for holding the sample; a stage with the holding mechanism mounted thereon and adapted to be movable in at least one direction; an electron beam source for generating electrons for irradiation of the electron beam directed to the sample; a first electro-optical system for guiding the electron beam generated from the electron beam source onto the sample for irradiation of the electron beam to the sample; a detector for detecting electrons emanating from the sample; a second electro-optical system for guiding the electrons to the detector; and a control unit to provide a control so that the stage is moved at a speed in synchronism with an operating speed of the detector during inspection of the pattern, and the stage is accelerated when being moved to another pattern on the sample, wherein the charging period and the discharging period of a substrate is input previously into the control unit, and is combined with the position data of the pattern to be inspected for calculating the condition where the distance or time period of movement between the patterns is minimized and the period of movement between the patterns is equal among all patterns.