Patent ID: 7026626
Filing Date: 2006-04-11
Classification: G01J,G01N

Abstract:
1. A method of analyzing a sample that is comprised of a plurality of thin films formed on a substrate, the method comprising: providing an expected configuration of at least a first and second thin film formed on the substrate; determining, based at least in part on the expected configuration, at least one optical property of the first thin film that is predominantly defined in a range of wavelengths that are below deep-ultra violet (DUV) wavelengths and at least one optical property of the second thin film that is not predominantly defined in a range of wavelengths that are below deep-ultra violet (DUV) wavelengths; recording an optical response data set of the sample over a range of wavelengths that includes at least a plurality wavelengths below deep-ultra violet (DUV) wavelengths; and characterizing at least one property of the first thin film by weighting the recorded optical response data set based upon the determination of the at least one optical property of the first thin film that is predominantly defined in a range of wavelengths that are below deep-ultra violet (DUV) wavelengths and the determination of at least one optical property of the second thin film that is not predominantly defined in a range of wavelengths that are below deep-ultra violet (DUV) wavelengths.