Micropoint cathode electron source with a focusing electrode

Details Micropoint cathode electron source with a focusing electrode Micropoint cathode electron source with a focusing electrode

1995-06-02

1996-12-03

O'Shea, Sandra L.

Electric lamp and discharge devices

Discharge devices having a multipointed or serrated edge...

313336, 313351, H01J 102

Patent

active

055811469

ABSTRACT:
Electron source made notably in the form of a micropoint cathode electrode in which a microcathode is located in a cavity (CA) of a dielectric (3). A first gate electrode (VG1) surrounds the cavity (CA) and a second gate electrode (VG2) surrounds the first gate electrode (VG1). The different electrodes are carried to potentials such that the first gate electrode (VG1) acts as an extraction electrode and the second gate electrode acts as a focusing electrode.

REFERENCES:
patent: 3748522 (1973-07-01), Geppert
patent: 4578614 (1986-03-01), Grey et al.
patent: 4874981 (1989-10-01), Spindt
patent: 4987377 (1991-01-01), Gray et al.
patent: 5140219 (1992-08-01), Kane
patent: 5191217 (1993-03-01), Kane et al.
patent: 5235244 (1993-08-01), Spindt
patent: 5281890 (1994-01-01), Kane

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