Field emission cold-cathode device
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United States of America Patent
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Aug 1, 2000
Grant Date -
N/A
app pub date -
Sep 18, 1997
filing date -
Sep 18, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A field emission cold-cathode device includes a support member and a plurality of emitters formed on said support member to emit electrons. Each emitter is made up of a plurality of carbon nanotubes basically constituted by an array of 6-membered rings of carbon. 70% or more of all of the carbon nanotubes have diameters of 30 nm or less. An aspect ratio representing the ratio of the height to the bottom diameter of the carbon nanotube forming the emitter is set at from 3 to 1.times.10.sup.3. The period of the 6-membered rings of carbon in the carbon nanotube is a multiple of 0.426 nm or 0.738 nm.
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