Metal-oxygen-carbon field emitters
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United States of America Patent
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Apr 23, 2002
Grant Date -
N/A
app pub date -
Oct 1, 1999
filing date -
Apr 2, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Metal-oxygen-carbon field emission electron emitter compositions and field emission cathodes made thereform are disclosed. A process for making metal-oxygen-carbon whisker field emitters is also provided, wherein a metal substrate (e.g., tungsten wire) is coated with an organic polymer and heated to a temperature of from about 1100.degree. C. to about 1550.degree. C. in an inert atmosphere for about 15 minutes to about two (2) hours. The heating temperature can be reduced when heating is carried out in the presence of a catalyst, such as a copper-nickel alloy catalyst. The emitter compositions and field emission cathodes of the invention are useful in vacuum electronic applications and devices (e.g., flat panel displays).
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