X-ray or gamma ray systems or devices – Specific application – Diffraction – reflection – or scattering analysis
Patent
1998-02-02
2000-03-21
Bruce, David V.
X-ray or gamma ray systems or devices
Specific application
Diffraction, reflection, or scattering analysis
378 70, 378 79, 378 88, G01N 2320
Patent
active
060410981
ABSTRACT:
The present invention relates to X-ray devices for the investigation of material structure, density and geometry of reflected surfaces by measuring reflected, diffracted or scattered radiation. These X-ray optical devices are especially useful for measuring polished surfaces with large reflective areas which are used in the electronics and the computer industry (wafers, memory discs), high precision mechanics and optics. The present invention describes a device which increases the accuracy and efficiency in which X-ray reflectometry measurements can be made in different parts of the X-ray spectral region. The main technical advantages of the invention are a two-fold reduction in the ultimate error of angular measurements in different spectral regions, and a decrease in the random errors associated with the intensity measurements that are observed which are due in part to a drift in the electric parameters of the device. Another technical advantage is the reduction in the measurement time for the study of single samples.
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R. Barchewitz, "X-ray photoabsorbption of solids by specular relfection," J. Phys. C:Solid State Phys., 1978, 9pp., vol. 11, The Institute of Physics, Great Britian.
Pirshin Igor V.
Touryanski Alexander G.
Vinogradov Alexander V.
Bruce David V.
Burns Ian F.
Schwartz Michael J.
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