Pulsed hybrid field emitter
Abstract
A hybrid emitter exploits the electric field created by a rapidly depoled ferroelectric material. Combining the emission properties of a planar thin film diamond emitter with a ferroelectric alleviates the present technological problems associated with both types of emitters and provides a robust, extremely long life, high current density cathode of the type required by emerging microwave power generation, accelerator technology and display applications. This new hybrid emitter is easy to fabricate and not susceptible to the same failures which plague microstructure field emitter technology. Local electrode geometries and electric field are determined independently from those for optimum transport and brightness preservation. Due to the large amount of surface charge created on the ferroelectric, the emitted electrons have significant energy, thus eliminating the requirement for specialized phosphors in emissive flat-panel displays.
- Inventors:
-
- Manteca, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 871400
- Patent Number(s):
- 5723954
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- pulsed; hybrid; field; emitter; exploits; electric; created; rapidly; depoled; ferroelectric; material; combining; emission; properties; planar; film; diamond; alleviates; technological; associated; types; emitters; provides; robust; extremely; life; current; density; cathode; type; required; emerging; microwave; power; generation; accelerator; technology; display; applications; easy; fabricate; susceptible; failures; plague; microstructure; local; electrode; geometries; determined; independently; optimum; transport; brightness; preservation; due; amount; surface; charge; emitted; electrons; significant; energy; eliminating; requirement; specialized; phosphors; emissive; flat-panel; displays; surface charge; current density; electric field; microwave power; power generation; field emitter; panel displays; panel display; charge created; field created; ferroelectric material; emission properties; emitted electrons; /315/257/313/
Citation Formats
Sampayan, Stephen E. Pulsed hybrid field emitter. United States: N. p., 1998.
Web.
Sampayan, Stephen E. Pulsed hybrid field emitter. United States.
Sampayan, Stephen E. Thu .
"Pulsed hybrid field emitter". United States. https://www.osti.gov/servlets/purl/871400.
@article{osti_871400,
title = {Pulsed hybrid field emitter},
author = {Sampayan, Stephen E},
abstractNote = {A hybrid emitter exploits the electric field created by a rapidly depoled ferroelectric material. Combining the emission properties of a planar thin film diamond emitter with a ferroelectric alleviates the present technological problems associated with both types of emitters and provides a robust, extremely long life, high current density cathode of the type required by emerging microwave power generation, accelerator technology and display applications. This new hybrid emitter is easy to fabricate and not susceptible to the same failures which plague microstructure field emitter technology. Local electrode geometries and electric field are determined independently from those for optimum transport and brightness preservation. Due to the large amount of surface charge created on the ferroelectric, the emitted electrons have significant energy, thus eliminating the requirement for specialized phosphors in emissive flat-panel displays.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}