Patent ID: 7483155

Claim:
A structure inspection method comprising: measuring wavelength dispersion of intensity of light reflected from an evaluation object located under an environment; preparing a complex refractive index of a substance forming the evaluation object and a complex refractive index of a substance forming the environment; setting virtual component ratios comprising a mixture ratio of the substance forming the evaluation object and the substance forming the environment in a predetermined space; making a multiple interference calculation using the complex refractive index of the substance forming the evaluation object and the complex refractive index of the substance forming the environment, thereby calculating reflectance wavelength dispersions to the virtual component ratios; extracting similar reflectance wavelength dispersions having a small difference with the measured wavelength dispersion from the reflectance wavelength dispersions; making weighted average to the virtual component ratios used for calculating the similar reflectance wavelength dispersions so that weighting is larger when the difference is smaller, thereby calculating a component ratio of the substance forming the evaluation object and the substance forming the environment; and determining a structure of the evaluation object from the calculated component ratio.