Patent ID: 9251993
Filing Date: 2016-02-02
CPC Classification: H01J

Claim Text:
1. An X-ray tube comprising: an electron emission source which emits an electron; an anode target which comprises a target layer emitting an X-ray by the electron from the electron emission source, and a substrate supporting the target layer and composed of a carbide-strengthened molybdenum alloy; an evacuated outer surrounding envelope which contains the electron emission source and the anode target; a diffusion barrier layer which is integrally formed with the substrate by a powder metallurgy method on a part of a top surface of the substrate and is composed of a high-melting-point metal lacking of carbon-element content compared with carbon-element content in the substrate; and a thermal radiation film which is formed on at least a part of a top surface of the diffusion barrier layer and composed of metallic oxide.