Manufacturing method for dispenser cathode for an electron gun

Details Manufacturing method for dispenser cathode for an electron gun Manufacturing method for dispenser cathode for an electron gun

1989-11-03

1990-12-11

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

445 51, 427 34, 427 78, H01J 904

Patent

active

049766449

ABSTRACT:
A manufacturing method for a dispenser cathode for the electron gun, said cathode comprising a container, an electron emissive material in the container, a porous metal body covering the emissive material, and a sleeve supporting the container. The method includes gas plasma sputtering process to form a porous metal body over the surface of the electron emissive material in the container. The method also may include forming a skirt along the upper edge of the container to strengthen the adherence of the porous metal body to the skirt and to achieve tight sealing of the skirt and porous metal body. The method also can prevent damage of the porous metal body, and can increase the beam currents.

REFERENCES:
patent: 3075066 (1963-01-01), Yenni et al.
patent: 3176180 (1965-03-01), Affect, III
patent: 4279709 (1981-07-01), McIntyre
patent: 4331528 (1982-05-01), Beer et al.

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