Carbon film having shape suitable for field emission
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United States of America Patent
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Apr 16, 2013
Grant Date -
Feb 17, 2011
app pub date -
Oct 26, 2010
filing date -
Aug 10, 2005
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Abstract
A carbon film of the present invention has an elongated needle shape whose radius decreases toward a tip. The shape is, preferably, a shape in which a field concentration coefficient β in the Fowler-Nordheim equation is expressed by h/r where r denotes the radius in an arbitrary position and h denotes height from the arbitrary position to the tip.
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