Patent ID: 9645086
Date: 2017-05-09
CPC Classifications: G01N

Claim:
1. A componential analysis method comprising: dividing a sample structure into at least a first layer to be analyzed and a second layer located closer to a surface layer of the sample than the first layer; applying, to the sample, laser lights of a first and a second wavelength respectively corresponding to depths of the first and second layers; detecting Raman scattered lights respectively obtained from the sample by the application of the laser lights and then outputting first and second Raman signals; spectrally processing the first and second Raman signals to acquire first and second Raman spectrums; correcting the first and second Raman signals by a contribution of a signal intensity change depending on a penetration depth of each of the first and second wavelengths; acquiring a differential spectrum by subtracting the second Raman spectrum from the first Raman spectrum; analyzing the differential spectrum; and wherein the correcting the first and second Raman signals comprises calculating a ratio of scattering volumes of the laser lights of the first and second wavelengths, using the obtained ratio as a coefficient to multiply a reciprocal number of the coefficient by the first and second Raman signals, and thereby normalizing the first and second Raman signals to integrated intensity per unit volume.