Patent ID: 6381303
Filing Date: 2002-04-30
Classification: G01N

Abstract:
Apparatus for X-ray microanalysis of a sample, comprising:a first X-ray source, which irradiates a spot having a dimension less than 500 &mgr;m on a surface of the sample along an axis generally perpendicular to the surface; a second X-ray source, which irradiates an area of the surface including the spot at a grazing angle relative to the surface; a first X-ray detector, which captures fluorescent X-rays emitted from the sample, responsive to irradiation by the first X-ray source, at a high angle relative to the surface of the sample; a second X-ray detector, which captures X-rays from the second X-ray source, which are reflected from the spot at the grazing angle; and processing circuitry, which receives respective signals from the first and second X-ray detectors responsive to the X-rays captured thereby, and which analyzes the signals in combination to determine a property of a surface layer of the sample within the area of the spot.