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Title: Processing of materials for uniform field emission

Abstract

This method produces a field emitter material having a uniform electron emitting surface and a low turn-on voltage. Field emitter materials having uniform electron emitting surfaces as large as 1 square meter and turn-on voltages as low as 16V/.mu.m can be produced from films of electron emitting materials such as polycrystalline diamond, diamond-like carbon, graphite and amorphous carbon by the method of the present invention. The process involves conditioning the surface of a field emitter material by applying an electric field to the surface, preferably by scanning the surface of the field emitter material with an electrode maintained at a fixed distance of at least 3 .mu.m above the surface of the field emitter material and at a voltage of at least 500V. In order to enhance the uniformity of electron emission the step of conditioning can be preceeded by ion implanting carbon, nitrogen, argon, oxygen or hydrogen into the surface layers of the field emitter material.

Inventors:
 [1];  [2];  [2];  [3];  [4];  [5]
  1. (Pleasanton, CA)
  2. (Livermore, CA)
  3. (Mountain View, CA)
  4. (Stanford, CA)
  5. (Pojoaque, NM)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
872088
Patent Number(s):
5857882
Assignee:
Sandia Corporation () SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
processing; materials; uniform; field; emission; method; produces; emitter; material; electron; emitting; surface; turn-on; voltage; surfaces; square; meter; voltages; 16v; produced; films; polycrystalline; diamond; diamond-like; carbon; graphite; amorphous; process; involves; conditioning; applying; electric; preferably; scanning; electrode; maintained; fixed; distance; 500v; enhance; uniformity; step; preceeded; implanting; nitrogen; argon; oxygen; hydrogen; layers; amorphous carbon; electron emitting; emitter material; square meter; electron emission; diamond-like carbon; process involves; electric field; field emission; surface layer; field emitter; surface layers; method produces; uniform electron; fixed distance; uniform field; emitting material; turn-on voltage; emitter materials; emitting surfaces; emitting surface; method produce; polycrystalline diamond; /445/427/

Citation Formats

Pam, Lawrence S., Felter, Thomas E., Talin, Alec, Ohlberg, Douglas, Fox, Ciaran, and Han, Sung. Processing of materials for uniform field emission. United States: N. p., 1999. Web.
Pam, Lawrence S., Felter, Thomas E., Talin, Alec, Ohlberg, Douglas, Fox, Ciaran, & Han, Sung. Processing of materials for uniform field emission. United States.
Pam, Lawrence S., Felter, Thomas E., Talin, Alec, Ohlberg, Douglas, Fox, Ciaran, and Han, Sung. Fri . "Processing of materials for uniform field emission". United States. https://www.osti.gov/servlets/purl/872088.
@article{osti_872088,
title = {Processing of materials for uniform field emission},
author = {Pam, Lawrence S. and Felter, Thomas E. and Talin, Alec and Ohlberg, Douglas and Fox, Ciaran and Han, Sung},
abstractNote = {This method produces a field emitter material having a uniform electron emitting surface and a low turn-on voltage. Field emitter materials having uniform electron emitting surfaces as large as 1 square meter and turn-on voltages as low as 16V/.mu.m can be produced from films of electron emitting materials such as polycrystalline diamond, diamond-like carbon, graphite and amorphous carbon by the method of the present invention. The process involves conditioning the surface of a field emitter material by applying an electric field to the surface, preferably by scanning the surface of the field emitter material with an electrode maintained at a fixed distance of at least 3 .mu.m above the surface of the field emitter material and at a voltage of at least 500V. In order to enhance the uniformity of electron emission the step of conditioning can be preceeded by ion implanting carbon, nitrogen, argon, oxygen or hydrogen into the surface layers of the field emitter material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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