Method for enhancing electron emission from carbon-containing cathode
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United States of America Patent
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Mar 17, 1998
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May 22, 1995
filing date -
Jul 9, 1993
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Abstract
A cathode structure is formed by a process in which a carbon-containing electron-emissive cathode is subjected to electronegative atoms that include oxygen and/or fluorine. The cathode is also subjected to atoms of electropositive metal, typically after being subjected to the atoms of oxygen and/or fluorine. The combination of the electropositive metal atoms and the electronegative atoms enhances the electron emissivity by reducing the work function.
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