Patent ID: 7368713
Filing Date: 2008-05-06
Classification: G01N,H01J

Abstract:
1. A semiconductor inspection apparatus having a length measurement function for performing size measurement between a measurement start point and an end point of a scan image obtainable by scanning a focused electron beam on a wafer, said apparatus comprising: means for emitting an electron beam with a constant sustained angle of incidence with respect to a workpiece having an energy capable of penetrating a part of the workpiece and reaching an unexposed portion; means for generating a scan image based on a secondary signal generated by irradiation of the electron beam with the constant sustained angle of incidence with respect to the workpiece; means for detecting, from the secondary signal thus obtained, position information of a pattern to be inspected and a signal intensity; means for generating a stereoscopic model of the pattern to be inspected; means for using the position information and the signal intensity thus detected to calculate a feature quantity of a shape of the pattern to be inspected; means for constructing a stereoscopic structure from the feature quantity of the pattern calculated; and means for displaying a three-dimensional structure of the stereoscopic structure thus constructed.