Patent ID: 7196793
Filing Date: 2007-03-27
Classification: G01B,G01J,G01N

Abstract:
1. An extremely-thin-film measurement and thin-film measurement method for analyzing spectroscopic data acquired from a spectroscopic ellipsometer using best-local-minimum-calculation (BLMC), said method comprising: a spectrum measurement step wherein incident light is cast onto a thin film on a substrate which is to be measured while changing the wavelength of the incident light as a parameter in order to obtain the Ψ a step for assuming the complex refractive index (N a step for performing fitting for the parameters of the dispersion formula (DSP) based upon combinations of said incident angle and said film thickness; a first analyzing step for selecting fitting results obtained based upon a model formed of a combination of said film thickness and said incident angle, which exhibits the minimal difference between the Ψ a second analyzing step for performing fitting for the film thickness and the dispersion formula with the incident angle obtained in said first analyzing step being fixed.