Patent ID: 6113733
Filing Date: 2000-09-05
Classification: H01L

Abstract:
An optical evaluation apparatus comprising:a chamber for containing a substrate having a semiconductor region;a first light source for generating exciting light;a second light source for generating measurement light;a first light guiding member, which is provided in said chamber, for intermittently supplying the exciting light generated from said first light source to the semiconductor region;a second light guiding member, which is provided on a ceiling portion of said chamber, for supplying the measurement light generated from said second light source to said semiconductor region;reflectance measuring means for measuring a reflectance of the measurement light supplied to said semiconductor region;a third light guiding member, which is provided in said chamber, for causing the measurement light reflected from said semiconductor region to be incident upon said reflectance measuring means; andchange calculating means for receiving an output from said reflectance measuring means and calculating a change rate of the reflectance of the measurement light by dividing a difference between the respective reflectances of the measurement light in the presence and absence of said exciting light supplied to said semiconductor region by the reflectance of the measurement light in the absence of the exciting light.