Patent ID: 7791024
Filing Date: 2010-09-07
Classification: G01B

Abstract:
1. A method of evaluating an element comprising: preparing a thin evaluation sample including a first portion in which a first layer containing a first material and a second layer containing a second material are laminated, a second portion containing the first material, and a third portion containing the second material; irradiating the first portion with an electron beam to measure a first electron-beam intensity which is an intensity of electrons showing a contrast dependent on an atomic mass of a material through which the electron beam has been transmitted among electrons that have been transmitted through the evaluation sample; irradiating the second portion with an electron beam to measure a second electron-beam intensity which is an intensity of electrons showing a contrast dependent on an atomic mass of the first material through which the electron beam has been transmitted among electrons that have been transmitted through the evaluation sample; irradiating the third portion with an electron beam to measure a third electron-beam intensity which is an intensity of electrons showing a contrast dependent on the atomic mass of the second material through which the electron beam has been transmitted among electrons that have been transmitted through the evaluation sample; and calculating a thickness of the first layer in the first portion by calculating a relationship between the first electron-beam intensity and the thickness of the first layer from a relationship between the second electron-beam intensity and a thickness of the evaluation sample and a relationship between the third electron-beam intensity and the thickness of the evaluation sample.