Patent ID: 7067818
Filing Date: 2006-06-27
Classification: G01J,G01N

Abstract:
1. A reflectometer which operates below deep ultra-violet (DUV) wavelengths, the reflectometer comprising: a light source that creates light including wavelengths below DUV wavelengths, the light being utilized to create at least one light beam in the reflectometer; at least one environmentally controlled chamber in which the light beam travels, the chamber sufficiently controlled to allow transmission of wavelengths below DUV light; a spectrometer that receives at least a portion of the light beam, the spectrometer providing multiple spatially separated wavelengths of light at an exit plane of the spectrometer, the multiple spatially separated wavelengths of light including wavelengths of light below DUV wavelengths; and an array detector that receives the multiple spatially separated wavelengths of light, the array detector detecting data for wavelengths below DUV wavelengths.