Stability of Field Emitter Arrays to Oxygen Exposures

Description:

The purpose of these experiments was to determine the degradation mechanisms of molybdenum based field emitter arrays to oxygen exposures and to improve the overall reliability. In addition, we also evaluated the emission current stability of gold-coated field emitter arrays to oxygen exposures. oxygen at 1x10-6 torr was introduced into the chamber through a leak valve for different lengths of time and duty cycles.
To ensure identical oxygen exposure and experimental measurement conditions, tips on half the area of the FEA were fully coated with gold and the other half were left uncoated. The emission current from the gold coated half was found to degrade much less than that from the uncoated half, in the presence of oxygen. Also in the absence of oxygen, the emission current recovery for the gold-coated side was much quicker than that for the uncoated side.

Creator(s): Godbole, Soumitra Kumar
Creation Date: December 2002
Partner(s):
UNT Libraries
Collection(s):
UNT Theses and Dissertations
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Total Uses: 140
Past 30 days: 5
Yesterday: 1
Creator (Author):
Publisher Info:
Publisher Name: University of North Texas
Place of Publication: Denton, Texas
Date(s):
  • Creation: December 2002
  • Digitized: July 19, 2007
Description:

The purpose of these experiments was to determine the degradation mechanisms of molybdenum based field emitter arrays to oxygen exposures and to improve the overall reliability. In addition, we also evaluated the emission current stability of gold-coated field emitter arrays to oxygen exposures. oxygen at 1x10-6 torr was introduced into the chamber through a leak valve for different lengths of time and duty cycles.
To ensure identical oxygen exposure and experimental measurement conditions, tips on half the area of the FEA were fully coated with gold and the other half were left uncoated. The emission current from the gold coated half was found to degrade much less than that from the uncoated half, in the presence of oxygen. Also in the absence of oxygen, the emission current recovery for the gold-coated side was much quicker than that for the uncoated side.

Degree:
Level: Master's
Discipline: Materials Science
Language(s):
Subject(s):
Keyword(s): Field emitter arrays | oxygen degradation | gold coated | reliability and life estimation | emission current recovery | stability
Contributor(s):
Partner:
UNT Libraries
Collection:
UNT Theses and Dissertations
Identifier:
  • OCLC: 52110410 |
  • ARK: ark:/67531/metadc3346
Resource Type: Thesis or Dissertation
Format: Text
Rights:
Access: Public
License: Copyright
Holder: Godbole, Soumitra Kumar
Statement: Copyright is held by the author, unless otherwise noted. All rights reserved.