Cathode structure with emissive layer formed on a resistive layer
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United States of America Patent
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Jul 12, 2005
Grant Date -
Oct 2, 2003
app pub date -
Feb 19, 2003
filing date -
Feb 19, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A triode type cathode structure including a cathode assembly composed of a cathode electrode at least one electron emitter and a resistive layer inserted between the cathode electrode and the at least one electron emitter to connect them together electrically. The triode cathode structure also includes a grid electrode separated from the cathode assembly by a layer of electrical insulation. The cathode electrode is arranged in a first plane and the at least one electron emitter is arranged in a second plane parallel to the first plane and the cathode electrode and each electron emitter are separated by a same distance measured in a third plane parallel to the first and second planes.
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