Field emission cathode

Details Field emission cathode Field emission cathode

1994-03-15

1996-04-09

Pascal, Robert J.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315162, 445 35, 445 46, 313364, H05B 3700

Patent

active

055064760

ABSTRACT:
A field emission cathode includes first and second cathode layers having respective projections and disposed on the surface of a substrate. An insulating layer having an opening and disposed on the surface of the cathode layer surrounds the projections. A field emission tip includes the projections, one of which is annular and projects beyond the other so that the field emission tip has a crater-like shape which improves the electron emission characteristic of the cathode.

REFERENCES:
patent: 3662214 (1972-05-01), Lustig
patent: 5315213 (1994-05-01), Kim

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