Patent ID: 7483560
Filing Date: 2009-01-27
Classification: G01N,G06T,H01L

Abstract:
1. A method of measuring a three dimensional shape of a fine pattern formed on a substrate, comprising the steps of: obtaining height information about the fine pattern by measuring the substrate; obtaining electron beam image information about the fine pattern by imaging the substrate by means of an electron microscope; and measuring the three dimensional shape of the fine pattern by use of the height information and the electron beam image information; wherein the electron beam image information includes information of average slope angle of a side wall of the fine pattern, information of a ratio of bottom roundness of the fine pattern and information of a ratio of top roundness of the fine pattern; wherein the information of average slope angle of a sidewall of the fine pattern is quantified by using information of a first-order differential waveform of a signal detected by the electron microscope of an average slope angle tan