Patent ID: 6128084
Filing Date: 2000-10-03
Classification: G01N,H01L

Abstract:
An evaluation method of a semiconductor layer, comprising the steps of:i) making linearly-polarized measurement light incident on the surface of the semiconductor layer at a tilt angle defined with respect to a normal crossing the surface at right angles, the semiconductor layer including an amorphous region with crystallinity disordered by dopant ions implanted into a substrate, the measurement light being tilted relative to p and s directions in a plane vertical to the optical axis thereof, the p direction being defined by an intersection between the plane vertical to the optical axis and a plane containing incident and reflected rays, the s direction being vertical to the p direction in the plane vertical to the optical axis;ii) deriving at least cos.DELTA. as to the reflected ray of the measurement light reflected as an elliptically-polarized ray from the semiconductor layer, where .DELTA. is a phase difference between p and s components;iii) measuring a spectrum of at least the cos.DELTA. variable with a variation in the wavelength of the measurement light; andiv) estimating a physical quantity of the amorphous region based on at least the spectrum of the cos.DELTA..