Electron emitter with nano-crystalline diamond having a Raman sp

Details Electron emitter with nano-crystalline diamond having a Raman sp Electron emitter with nano-crystalline diamond having a Raman sp

1999-02-19

2000-07-04

Day, Michael H.

Electric lamp and discharge devices

Discharge devices having an electrode of particular material

313309, 313336, 313351, 313495, H01J 105, H01J 102, H01J 6304, H01J 116

Patent

active

060843403

ABSTRACT:
In an electron-emitting component with a cold cathode comprising a substrate and a cover layer with a diamond-containing material consisting of nano-crystalline diamond having a Raman spectrum with three lines, i.e. at K=1334.+-.4 cm.sup.-1 with a half-width value of 12.+-.6 cm.sup.-1, at K=1140.+-.20 cm.sup.-1 and at K=1470.+-.20 cm.sup.-1, the cold cathode exhibits a low extraction field strength, a stable emission at pressures below 10.sup.-4 mbar, a steep current-voltage characteristic and stable emission currents in excess of 1 microampere/mm.sup.2. The electron emission of the component demonstrates a long-time stability, and a constant intensity of the electron beam across its cross-section.

REFERENCES:
patent: 5623180 (1997-04-01), Jin et al.
patent: 5726524 (1998-03-01), Debe
patent: 5777427 (1998-07-01), Tanaka et al.
patent: 5808401 (1998-09-01), Jin et al.

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