Thermal electron emission source having carbon nanotubes and method for making the same
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United States of America Patent
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Issued Date -
Jun 25, 2009
app pub date -
Apr 4, 2008
filing date -
Dec 19, 2007
priority date (Note) -
Abandoned
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Abstract
A thermal electron emission source includes a first electrode, a second electrode insulated from the first electrode, a carbon nanotube string electrically connected to and in contact with the first electrode and the second electrode, and a number of electron emission particles. The carbon nanotube string is composed of a number of closely packed carbon nanotube bundles, and each of the carbon nanotube bundles includes a number of carbon nanotubes. The electron emission particles are uniformly dispersed in the carbon nanotube string and are coated on the surfaces of the carbon nanotubes. A method for making the thermal electron emission source is also provided.
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