Carbon-backed x-ray target with coating
US6078644A · kind A · utility
4Cited by
15References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1998 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Jul 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/1229
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.