Method for manufacturing thermionic cathode

Details Method for manufacturing thermionic cathode Method for manufacturing thermionic cathode

1978-04-20

1979-09-25

Lazarus, Richard B.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

29 2518, H01J 904

Patent

active

041685652

ABSTRACT:
A method for manufacturing a thermionic cathode is provided which comprises cutting a bar from a multi-layer structure having a first layer of thermoelectron emissive compound and a third layer of metal of high melting point, a second layer of reaction barrier being interposed between said first and third layers, the bar being cut in a direction substantially perpendicular to that of the layers, sharpening the end of the first layer of the bar and then providing current terminals with the third layer of the bar. According to the method of the invention, a thermionic cathode capable of emitting stable electron beams of high intensity for a long period of time can be manufactured.

REFERENCES:
patent: 3745403 (1973-07-01), Misumi
patent: 3823337 (1974-07-01), VAN Stratum et al.
patent: 4055780 (1977-10-01), Kawai et al.

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