Patent ID: 6823043
Filing Date: 2004-11-23
Classification: G01N

Abstract:
A method for determining parameters of a material, comprisinga) calculating an expected x-ray scattering profile for an approximation of said material, b) obtaining an actual x-ray scattering profile of said material, c) comparing a selected range of said expected x-ray scattering profile with a selected range of said actual x-ray scattering profile and generating error data based upon differences between the profiles over the selected ranges, d) modifying said expected x-ray scattering profile according to said error data, e) repeating steps c) and d) until said selected range of the expected x-ray scattering profile substantially matches said range of the actual x-ray scattering profile, f) expanding said selected range of said expected x-ray scattering profile, g) repeating steps c) to f) until said expected x-ray scattering profile substantially matches said actual x-ray scattering profile, and thereby determining parameters of the material from the parameters used for the last modified expected x-ray scattering profile.