Target for X-ray tube as well as method of manufacturing the same, and X-ray tube
US4939762A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 15, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Nov 15, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/084
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An X-ray target having a graphite body and an X-ray generating metal coating layer, in that a metal interlayer which is non-reactive with graphite and which has a coefficient of thermal expansion substantially equal to those of the graphite and the X-ray generating metal coating layer is formed at the boundary between the graphite body and the X-ray generating metal coating layer, and that the interlayer is caused to percolate into the graphite body. Desirably, the interlayer includes a part percolating into the graphite body over a depth of at least 10 .mu.m. The X-ray target can be manufactured in such a way that the surface of the graphite body is coated with the metal interlayer by subjecting the surface to chemical vapor deposition under a normal pressure or under a pressure near the normal pressure, and that the metal interlayer is thereafter coated with an X-ray generating metal by an expedient such as chemical vapor deposition, sputtering or thermal spraying. Owing to the percolation of the metal interlayer into the graphite body, the contact area of the two increases conspicuously, and heat having developed in the X-ray generating metal coating layer is quickly transmitted…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.