Patent ID: 8502979

Claim:
A system configured to determine at least two properties of a specimen, comprising: a measurement device coupled to a stage configured to support the specimen, wherein the measurement device is configured as a spectroscopic scatterometer and a spectroscopic ellipsometer; wherein the spectroscopic scatterometer is configured to direct light toward repeatable pattern features on a surface of the specimen, wherein the spectroscopic scatterometer comprises a spectrometer configured to measure diffraction order intensities of different wavelengths of light diffracted from the repeatable pattern features, and wherein the diffraction order intensities comprise diffraction order intensities higher than the zeroth diffraction order intensity; and a processor coupled to the spectroscopic spectrometer and the spectroscopic ellipsometer and configured to determine at least a first property of the repeatable pattern features using output of the spectrometer responsive to the measured diffraction order intensities and to determine overlay misregistration of the specimen using the output of the spectrometer or output of the spectroscopic ellipsometer, wherein the at least the first property comprises a grating shape parameter of the repeatable pattern features.