Patent ID: 6950186
Filing Date: 2005-09-27
Classification: G01B,G01N

Abstract:
1. A polarization analyzing method, comprising the steps of: obtaining reference data from theoretical calculation of values based on a phase difference Δ between a p-polarization component and an s-polarization component and an amplitude ratio ψ of a p-polarization component to an s-polarization component of a light reflected from an object to be measured when illuminating an elliptically polarized incident light of a predetermined wavelength on the object to be measured having a film as a measurement target on a surface thereof at a specified incident angle; and measuring values based on a phase difference Δ between a p-polarization component and an s-polarization component and an amplitude ratio ψ of a p-polarization component to an s-polarization component of a light reflected when actually illuminating the incident light on the object to be measured and comparing the measured values with the reference data to analyze the film, wherein in obtaining the reference data the theoretical calculation is carried out by using a reflective surface of the p-polarization component and a reflective surface of the s-polarization component differing from each other.