Electron device employing field-emission cathode
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United States of America Patent
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Oct 13, 1998
Grant Date -
N/A
app pub date -
Apr 18, 1996
filing date -
Apr 20, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Concave portions are formed, in a matrix fashion, in a substrate formed of metal or semiconductor. An electron emission layer made of material having small work function such as a diamond thin film is formed on the bottom portion of the concave portion. A protruding portion of the substrate serves as a beam formation electrode. Divergence of electrons can be suppressed with the beam formation electrode. A gate electrode for drawing out the electrons is formed above the beam formation electrode.
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