Patent ID: 7295307
Filing Date: 2007-11-13
Classification: G01J,G01N

Abstract:
1. A method of measuring a stress of a semiconductor material by irradiating an excitation light on a semiconductor material formed from providing a silicon germanium layer and a strained silicon layer in a multilayer structure on a single crystal silicon substrate from the direction of the strained silicon layer, and measuring an internal stress of the semiconductor material from peak position information of a Raman spectrum of scattered light from an irradiating point, comprising: providing a light having a wavelength capable of reaching the single crystal silicon substrate as the excitation light; collecting the excitation light from the semiconductor material; estimating a temperature of the semiconductor material from a shift amount of the peak position of the Raman spectrum of the scattered light from the substrate in accordance with the irradiation of the excitation light of the foregoing wavelength; correcting shift amounts of the peak positions of the Raman spectra in the strained silicon layer and in the silicon germanium layer with the estimated temperature; and calculating the internal stresses of the strained silicon layer and the silicon germanium layer from the corrected peak position information of the Raman spectra in the respective layers.