Patent ID: 7151258
Filing Date: 2006-12-19
Classification: H01J

Abstract:
1. An electron beam system connected to an electron beam device having an electron optical system for irradiating an electron beam emitted from an electron beam source on a sample; a sample holder for holding the sample; a sample tilting section for relatively tilting the sample holder and the electron beam so that a stereo image of the sample can be acquired; and an electron beam detecting section for detecting an electron beam emitted from the sample, comprising: a correction factor storing section for storing a correction factor at a reference tilt angle with respect to a plane which is used to tilt the sample by the sample tilting section; an approximate coordinate measuring section for obtaining an approximate shape or approximate coordinate values of the sample based on an output corresponding to a stereo image from the electron beam detecting section; an image correcting section for correcting the stereo image according to a tilt angle created by the sample tilting section based on the shape or coordinate values of the sample obtained in the approximate coordinate measuring section using the correction factor stored in the correction factor storing section; and a precise coordinate measuring section for obtaining a shape or coordinate values of the sample which are more precise than those obtained in the approximate coordinate measuring section based on a corrected stereo image corrected in the image correcting section.