Electron beam emitting tungsten filament

Details Electron beam emitting tungsten filament Electron beam emitting tungsten filament

1997-08-18

1999-01-26

Patel, Ashok

Electric lamp and discharge devices

Discharge device with positive ion emitter

3133621, 313336, 313311, H01J 2700

Patent

active

058641998

ABSTRACT:
Electron beam emitting filaments having a tip with a radius of curvature less than about 50 .ANG. are produced using focused ion beam milling. In one embodiment, platinum is deposited on a tungsten loop electron beam filament and sharpened using focused ion beam milling to a radius of curvature less than about 50 .ANG..

REFERENCES:
patent: 3998678 (1976-12-01), Fukase et al.
patent: 4055780 (1977-10-01), Kawai et al.
patent: 4088919 (1978-05-01), Clampitt et al.
patent: 4379250 (1983-04-01), Hosoki et al.
patent: 4427886 (1984-01-01), Martin et al.
patent: 4467240 (1984-08-01), Futamoto et al.
patent: 4551650 (1985-11-01), Noda et al.
patent: 4775818 (1988-10-01), Clark, Jr. et al.
patent: 4994711 (1991-02-01), Matossian
patent: 5138220 (1992-08-01), Kirkpatrick
patent: 5145435 (1992-09-01), Ayers
patent: 5227699 (1993-07-01), Busta
patent: 5239863 (1993-08-01), Kado et al.
patent: 5494179 (1996-02-01), Hori et al.
patent: 5495143 (1996-02-01), Lengyel et al.
patent: 5616926 (1997-04-01), Shinada et al.
L.C. Hopkins et al., "Polycrystalline tungsten and iridium probe tip preparation with a Ga.sup.+ focused ion beam", Journal of Vacuum Science Technology B 13(2), Mar./Apr. 1995, pp. 335-337.
"Energy Beam Sciences Tungsten Filaments for Electron Microscopes", Energy Beam Science, Inc., Catalog 3, pp. 1 and 3-6.
L.R. Harriott, "Beam-size measurements in focused ion beam systems", Journal of Vacuum Science & Technology A, Second Series, vol. 8, No. 2, Mar./Apr. 1990, pp. 899-901.

Affiliated with

Also associated with

Rating

Electron beam emitting tungsten filament does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electron beam emitting tungsten filament, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron beam emitting tungsten filament will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1452673