Patent ID: 8908830

Claim:
A surface microstructure measurement method of measuring a microstructure on a specimen surface, the method comprising the steps of: irradiating said specimen surface with X-ray at a grazing incident angle and measuring a scattering intensity; assuming a specimen model with a microstructure on a surface in which one or more layers is formed in a direction perpendicular to said surface and unit structures are periodically arranged in a direction parallel to said surface within the layers, calculating a scattering intensity of X-ray scattered by said microstructure based on refractive indexes of respective layers of the one or more layers in the direction perpendicular to said surface, and fitting the scattering intensity of X-ray calculated by said specimen model to said measured scattering intensity; and determining, as a result of the fitting, an optimum value of a parameter for specifying a shape of said unit structures.