Field emission devices employing diamond particle emitters

Details Field emission devices employing diamond particle emitters Field emission devices employing diamond particle emitters

1998-01-13

1999-11-02

Ramsey, Kenneth J.

Electric lamp and discharge devices

Discharge devices having a thermionic or emissive cathode

313311, 445 51, H01J 130

Patent

active

059776978

ABSTRACT:
Improved diamond particle emitters, useful for flat panel displays, are fabricated by suspending nanometer-sized ultra-fine particles in a solution, applying the suspension as a coating onto a conducting substrate such as n-type Si or metal, subjecting the coated substrate to a plasma of hydrogen, and applying a thin, conformal diamond overcoating layer onto the particles. The resulting emitters show excellent emission properties, such as extremely low turn-on voltage, good uniformity and high current densities. In particular, the electron emitters are capable of producing electron emission current densities of at least 0.1 mA/,mm.sup.2 at extremely low vacuum electric fields of 0.2-3.0 V/.mu.m V/.mu.m. These field values are about an order of magnitude lower than exhibited by the best defective CVD diamond and almost two orders of magnitude lower than p-type semiconducting diamond. It is further found that the emission characteristics remain the same even after the plasma treated diamond surface is exposed to air for several months.

REFERENCES:
patent: 4490916 (1985-01-01), Borel et al.
patent: 5129850 (1992-07-01), Kane et al.
patent: 5138237 (1992-08-01), Kane et al.
patent: 5242711 (1993-09-01), DeNatale et al.
patent: 5283500 (1994-02-01), Kochanski
patent: 5504385 (1996-04-01), Jin et al.
patent: 5623180 (1997-04-01), Jin et al.
patent: 5637950 (1997-06-01), Jin et al.
patent: 5686791 (1997-11-01), Kumar et al.
"Vacuum Microelectronics", by Hawkes, P. W., Advances in Electronics and Electron Physics, vol. 83, Academic Press Inc., pp. 75-107 (1992).
"Cold Cathode Field Emission Array", by Castellano, J. A., Handbook of Display Technology, Academic Press Inc., pp. 254-257 (1992).
"Field-Emitter Arrays for Vacuum Microelectronics", by Spindt, C. A. et al., IEEE Transactions on Electron Devices, vol. 38, No. 10, pp. 2355-2363 (Oct. 1991).
"Defect-Enhanced Electron Field Emission from Chemical Vapor Deposited Diamond", by Zhu, W. et al., J. Appl. Phys., 78 (4), pp. 2707-2711 (Aug. 15, 1995).
"Fabrication of a Diamond Field Emitter Array", by Okano, K. et al., Appl. Phys. Lett., 64 (20), pp. 2742-2744 (May 16, 1994).

Affiliated with

Also associated with

Rating

Field emission devices employing diamond particle emitters 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 devices employing diamond particle emitters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Field emission devices employing diamond particle emitters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2139811