Electric lamp and discharge devices – Discharge devices having three or more electrodes
Patent
1974-07-24
1976-08-31
Chatmon, Jr., Saxfield
Electric lamp and discharge devices
Discharge devices having three or more electrodes
313250, 313309, 313338, H01J 146, H01J 2110
Patent
active
039783642
ABSTRACT:
High efficiency, multi-dimensional thin film vacuum tubes suitable for use in high temperature, high radiation environments are described. The tubes are fabricated by placing, as by photolithographic techniques, such as are used in solid state integrated circuits, thin film electrode members in selected arrays on facing interior wall surfaces of an alumina substrate envelope. Cathode members are formed using thin films of triple carbonate. The photoresist used in photolithography aids in activation of the cathodes by carbonizing and reacting with the reduced carbonates when heated in vacuum during forming. The finely powdered triple carbonate is mixed with the photoresist used to delineate the cathode locations in the conventional solid state photolithographic manner. Upon high temperature forming (1000.degree. C) the barium, etc. is formed at the surface. Anode and grid members are formed using thin films of refractory metal. Electron flow in the tubes is between grid elements from cathode to anode as in a conventional three-dimensional tube. Both circular geometry for average requirements as well as a repeated linear structure for increased current and power handling capability are employed.
REFERENCES:
patent: 3066236 (1962-11-01), Sandbank
patent: 3320464 (1967-05-01), Dill
patent: 3463978 (1969-08-01), Varadi
patent: 3701919 (1972-10-01), Geppert
patent: 3748522 (1973-07-01), Geppert
patent: 3824478 (1974-07-01), Mueller
Dimeff John
Kerwin William J.
Brekke Darrell G.
Chatmon, Jr. Saxfield
Manning John R.
Morin, Sr. Armand G.
The United States of America as represented by the Administrator
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