Carbon-backed x-ray target with coating
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United States of America Patent
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Jun 20, 2000
Grant Date -
N/A
app pub date -
Jul 1, 1998
filing date -
Jul 1, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An x-ray target has a substrate of a carbonaceous material such as graphite which is secured to a rotary shaft so as to rotate therewith. A portion of outer peripheral surface of the substrate is covered by a target plate, while the other portion is covered with a thin iridium layer with thickness in a range between 50 .ANG. and 250 .ANG. so that the trapped gas species like H.sub.2, CO, CO.sub.2 can escape therethrough, and to retard the diffusion of ambient gas species into the substrate while the infrared emissivity of the underlying substrate is not lowered appreciably thereby.
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