Electron emission element
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United States of America Patent
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Apr 5, 2005
Grant Date -
Mar 25, 2004
app pub date -
Sep 12, 2003
filing date -
Sep 20, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electron emission element according to the present invention comprises a substrate, and a plurality of protrusions composed of diamond and protruding from the substrate. Each protrusion includes a columnar portion, the side face of which forms an inclination of approximately 90.degree. relative to the surface of the substrate, and a tip portion, which is located on the columnar portion having a spicular end. A conductive layer is formed on the upper part of each columnar portion, and a cathode electrode film, which is electrically connected to the conductive layer, is formed on the side face of the columnar portion.
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