Detector-shield assembly for X-ray reflectometric system

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United States of America Patent

PATENT NO 6770886
SERIAL NO

09969561

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A detector assembly is introduced that provides shielding of irradiation vulnerable regions of an X-ray detector against directly impinging and scattered X-rays. A shielding unit has a primary aperture to shape an X-ray beam reflected from a test area of a work piece such that the shaped beam directly impinges an X-ray sensing area of the detector. A secondary aperture shields off X-rays scattering off along the edges of the primary aperture. In the preferred embodiment, the shielding unit is a monolithic structure. An area between primary and secondary aperture is laterally recessed to prevent a portion of scattered X-rays from being deflected onto the sensing area.

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Patent Owner(s)

  • THERMA-WAVE, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koppel, Louis N Redwood City, CA 8 363
Schmelz, Charles Redwood City, CA 1 0

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