Electric lamp and discharge devices – Electrode and shield structures – Cathodes containing and/or coated with electron emissive...
Patent
1993-07-09
1995-10-31
O'Shea, Sandra L.
Electric lamp and discharge devices
Electrode and shield structures
Cathodes containing and/or coated with electron emissive...
313310, 257 77, 257 11, H01J 130, H01J 1924
Patent
active
054632714
ABSTRACT:
A cathode structure contains electronegative atoms (22), which consist of oxygen and/or fluorine, chemically bonded to a carbon-containing cathode (10). Atoms (24R) of electropositive metal are chemically bonded to the electronegative atoms. The combination of the electropositive metal atoms and the electronegative atoms enhances the electron emissivity by reducing the work function.
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Geis Michael W.
Macaulay John M.
Twichell Jonathan C.
MacPherson Alan H.
Massachusetts Institute of Technology
Meetin Ronald J.
O'Shea Sandra L.
Patel Ashok
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