Thermionic cathode and method of manufacturing same

Details Thermionic cathode and method of manufacturing same Thermionic cathode and method of manufacturing same

1982-09-13

1985-06-18

Moore, David K.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

313351, 313338, 445 50, 445 51, H01J 113

Patent

active

045242976

ABSTRACT:
A cathode having a layer structure in which alternate layers consisting essentially of emitter material (2) and base material (1) are provided at an oblique angle to the cathodes's macroscopic emitting surface. In a preferred embodiment the surface has a microscopically stepped structure formed by ends of the base material layers and portions of the emitter material layers coating the ends. In an alternative embodiment the surface is not stepped but is formed by a polycrystalline or a preferentially oriented polycrystalline coating layer which is provided on the succession of beveled layers. The succession of layers is manufactured by alternating depositions from the gaseous phase and by subsequent bevel grinding of the layers. The polycrystalline coating layer is provided by deposition from the gaseous phase. The stepped surface is formed, for example, by selective structure etching after the bevel grind.

REFERENCES:
patent: 2878409 (1959-03-01), Levi
patent: 3290543 (1966-12-01), Weissman

Affiliated with

Also associated with

Rating

Thermionic cathode and method of manufacturing same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermionic cathode and method of manufacturing same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermionic cathode and method of manufacturing same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-981624