Non-evacuated lateral fed employing emitter-anode spacing less than mean free path distance of an electron in air
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Apr 30, 1996
filing date -
Oct 28, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Lateral field emission devices ('FEDs') for display elements and methods of fabrication are set forth. The FED includes a thin-film emitter oriented parallel to, and disposed above, a substrate. The FED further includes a columnar shaped anode having a first lateral surface. A phosphor layer is disposed adjacent to the first lateral surface. Specifically, the anode is oriented such that the lateral surface and adjacent phosphor layer are perpendicular to the substrate. The emitter has a tip which is spaced less than the mean free distance of an electron in air from the phosphor layer. Operationally, when a voltage potential is applied between said anode and said emitter, electrons are emitted from the tip of the emitter into the phosphor layer causing the phosphor layer to emit electromagnetic energy. Further specific details of the field emission device, fabrication method, method of operation, and associated display are set forth.
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