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Title: Electrochemical sharpening of field emission tips

Abstract

A method is disclosed for sharpening field emitter tips by electroetching/polishing. In gated field emitters, it is very important to initiate electron emission at the lowest possible voltage and thus the composition of the emitter and the gate, as well as the emitter-gate structure, are important factors. This method of sharpening the emitter tips uses the grid as a counter electrode in electroetching of the emitters, which can produce extremely sharp emitter tips as well as remove asperities and other imperfections in the emitters, each in relation to the specific grid hole in which it resides. This has the effect of making emission more uniform among the emitters as well as lowering the turn-on voltage. 3 figs.

Inventors:
Issue Date:
Research Org.:
University of California
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
335479
Patent Number(s):
5,891,321
Application Number:
PAN: 8-847,087
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 426000; PA: EDB-99:046803; SN: 99002077302
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 6 Apr 1999
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; FIELD EMISSION; ELECTRON EMISSION; ELECTRIC POTENTIAL; ELECTRON SOURCES; SURFACE FINISHING

Citation Formats

Bernhardt, A.F. Electrochemical sharpening of field emission tips. United States: N. p., 1999. Web.
Bernhardt, A.F. Electrochemical sharpening of field emission tips. United States.
Bernhardt, A.F. Tue . "Electrochemical sharpening of field emission tips". United States.
@article{osti_335479,
title = {Electrochemical sharpening of field emission tips},
author = {Bernhardt, A.F.},
abstractNote = {A method is disclosed for sharpening field emitter tips by electroetching/polishing. In gated field emitters, it is very important to initiate electron emission at the lowest possible voltage and thus the composition of the emitter and the gate, as well as the emitter-gate structure, are important factors. This method of sharpening the emitter tips uses the grid as a counter electrode in electroetching of the emitters, which can produce extremely sharp emitter tips as well as remove asperities and other imperfections in the emitters, each in relation to the specific grid hole in which it resides. This has the effect of making emission more uniform among the emitters as well as lowering the turn-on voltage. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {4}
}