Field emission cathode having focusing electrode

Details Field emission cathode having focusing electrode Field emission cathode having focusing electrode

1996-02-27

1998-03-03

Anderson, Bruce

Radiant energy

Ion generation

Field ionization type

313309, G01N 2700, H01J 102

Patent

active

057238677

ABSTRACT:
In a field emission cathode, periphery portions of opening portions of a gate electrode are recessed on a side of a substrate, and a focusing electrode having opening portions which are identical in number with the opening portions of the gate electrode are disposed on the gate electrode. Further, a shield electrode having opening portions which are identical in number with opening portions of the gate electrode are disposed between the gate electrode and the focusing electrode. According to the above-mentioned construction, a focusing aberration can be reduced, and a focused electron flow can be obtained by a low electric potential of the gate electrode.

REFERENCES:
patent: 4663559 (1987-05-01), Christensen
patent: 5030895 (1991-07-01), Gray
patent: 5191127 (1993-03-01), Babler
patent: 5191217 (1993-03-01), Kane et al.
patent: 5229682 (1993-07-01), Komatsu
patent: 5493173 (1996-02-01), Imura
patent: 5514847 (1996-05-01), Makishima et al.
patent: 5543680 (1996-08-01), Tomihari
A.S. Gilmour, Jr., "Microwave Tubes", Artech House, pp. 141-143, 1986.

Affiliated with

Also associated with

Rating

Field emission cathode having focusing electrode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Field emission cathode having focusing electrode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Field emission cathode having focusing electrode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2250990