Field emission cathode and methods in the production thereof

Details Field emission cathode and methods in the production thereof Field emission cathode and methods in the production thereof

1995-06-06

1996-12-31

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With start up, flashing or aging

445 50, H01J 902

Patent

active

055888933

ABSTRACT:
An improved field emission cathode and methods for fabricating such an cathode are disclosed. In the methods of the invention, the field emission cathode is made from at least one body containing a first substance. The method steps include a preparation of irregularities in an emitting surface of the body, adding to the emitting surface of the body ions of a second substance with a low work function, and modifying the emitting surface by inducing field emission in applying a variable electric field to the body and increasing the field strength in steps.

REFERENCES:
patent: 2817002 (1957-12-01), Dyke et al.
patent: 3921022 (1975-11-01), Levine
patent: 4143292 (1979-03-01), Hosoki et al.
patent: 4272699 (1981-06-01), Faubel et al.
patent: 4728851 (1988-03-01), Lambe
patent: 5089292 (1992-02-01), MaCaulay et al.
patent: 5209687 (1993-05-01), Konishi
patent: 5211707 (1993-05-01), Ditchek et al.

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