Patent ID: 8054453
Filing Date: 2011-11-08
Classification: G01J,G01N

Abstract:
1. A reflectometer, comprising: a light source that creates light including wavelengths below deep ultra-violet (DUV) wavelengths, the light being utilized to create at least one light beam in the reflectometer; a region in which the light beam travels, the region sharing, at least at times, an environment with at least a portion of a process tool sample chamber so as to create a shared environment with the process tool sample chamber, the shared environment being sufficiently controlled so as to allow the transmission and measurement of light wavelengths below DUV wavelengths; a detector configured to receive reflectance data from a sample located inside the process tool sample chamber during measurement of the reflectance, the detector detecting data for wavelengths at least below DUV wavelengths; and at least one coupling mechanism interfacing the reflectometer with the process tool sample chamber and configured to permit the light from the light source to pass from the region into the sample chamber and to permit the light reflected from the sample to pass from the sample chamber to the first region so as to be received by the detector.