Patent ID: 6408048
Filing Date: 2002-06-18
Classification: G01N

Abstract:
A unitary apparatus for evaluating a sample comprising:(a) a first measurement module including: (i) means for inducing a periodic localized excitation at the surface of the sample; (ii) means for directing a first probe beam of radiation within a portion of the area periodically excited in a manner such that the first probe beam reflects from the surface of the sample; (iii) means for measuring the periodic variations of the reflected first probe beam induced by said periodic excitation to generate first output signals; (b) a second measurement module including: (i) means for generating a second probe beam, said second probe beam having X-ray wavelengths; (ii) means for directing said second probe beam onto the surface of said sample; (iii) a detector for measuring the intensity of X-rays reflected from said sample to generate second output signals; and (c) a processor for evaluating the sample based on a combination of the first and second output signals.