Field emission cathode structure
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United States of America Patent
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Apr 29, 2014
Grant Date -
Jun 28, 2012
app pub date -
May 23, 2011
filing date -
Dec 27, 2010
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Abstract
A field emission cathode structure includes a first carbon nanotube structure including a plurality of first carbon nanotubes, and a second carbon nanotube structure located on the surface of the first carbon nanotube structure. The second carbon nanotube structure includes a plurality of second carbon nanotubes substantially perpendicular to the first carbon nanotubes structure. The second carbon nanotube structure includes a peak. The heights of the second carbon nanotubes at the peak are tallest. The heights of the carbon second carbon nanotubes gradually decrease along the direction away from the peak. A method for fabricating the field emission cathode structure is also presented.
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