Patent ID: 8890096
Filing Date: 2014-11-18
Classification: H01J

Abstract:
1. A measuring/inspecting apparatus for carrying out at least one of measuring and inspecting of a sample by a scanning electron beam system, the measuring/inspecting apparatus comprising: an entirety control unit that controls the measuring/inspecting apparatus and articulates a measuring or inspecting process; an interface unit that provides a user interface for an operation including the measuring or the inspecting; an electrooptical system that includes an optical lens for irradiating the sample with an electron beam; an electrooptical control unit that controls the electrooptical system; a deflector for controlling an irradiation position by deflection for scanning control of the electron beam with respect to the sample; a deflection control circuit that generates a control signal and applies the control signal to the deflector; a detector that detects a secondary electron or other energy generated from the sample as a result of irradiation with the electron beam; a signal processing system that processes a signal detected by the detector, generates an image of the measuring or the inspecting, and outputs the image to a user; a storage unit that stores data information about the measuring or the inspecting; a main blanking unit for controlling shutoff of the irradiation of the electron beam with respect to the sample; a correction blanking unit for correction with respect to the main blanking unit; and an aperture for shutting off the electron beam; wherein the main blanking unit has a main blanking electrode and a main blanking control circuit that generates a main blanking control signal and applies the main blanking control signal to the main blanking electrode; the correction blanking unit has a correction blanking electrode and a correction blanking control circuit that generates a correction blanking control signal and applies the correction blanking control signal to the correction blanking electrode; and in a period of switching of the state of shutoff of the electron beam from ON to OFF by applying the main blanking control signal from the main blanking control circuit to the main blanking electrode, positional misalignment of the irradiation of the electron beam caused by the main blanking control signal is corrected by applying the correction blanking control signal from the correction blanking control circuit to the correction blanking electrode.