Controllable thermionic electron emitter

Details Controllable thermionic electron emitter Controllable thermionic electron emitter

1997-03-11

1998-04-07

Patel, Nimeshkumar

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 58, 445 49, 313346R, 313346DC, 313310, H01J 302, H01J 2904

Patent

active

057357200

ABSTRACT:
The invention relates to a controllable thermionic electron emitter for vacuum tubes, which comprises an emitter layer (3, 27) and a control layer (5) which is separated from the emitter layer by an insulating layer (4), with the insulating layer and the control layer being manufactured by a deposition process. Also when its dimensions are small, such an electron emitter can be dimensionally accurately manufactured. All functional elements of the controllable thermionic electron emitter, more particularly control layer(s) (5, 7, 22, 24), emitter layer (3, 27) and separating insulating layers (2, 4, 6, 21, 23, 25) are successively deposited on a substrate (1, 20) in the direction of growth, in such a manner that the layers adhere to each other via solid boundary layers. In operation and, in particular, when the temperature varies, the dimensional accuracy of the electron emitter is preserved within narrow limits, and said electron emitter has a long service life.

REFERENCES:
patent: 3710161 (1973-01-01), Beggs
patent: 3843902 (1974-10-01), Miram et al.
patent: 3967150 (1976-06-01), Lien et al.
patent: 4096406 (1978-06-01), Miram et al.
patent: 4250428 (1981-02-01), Oliver et al.

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