Compositions – Electrically conductive or emissive compositions – Carbide containing
Patent
1998-05-18
2000-02-01
Ramsey, Kenneth J.
Compositions
Electrically conductive or emissive compositions
Carbide containing
2525181, 2525213, 445 51, H01J 902
Patent
active
06019913&
ABSTRACT:
Low work function, stable compound clusters are generated by co-evaporation of a solid semiconductor (i.e., Si) and alkali metal (i.e., Cs) elements in an oxygen environment. The compound clusters are easily patterned during deposition on substrate surfaces using a conventional photo-resist technique. The cluster size distribution is narrow, with a peak range of angstroms to nanometers depending on the oxygen pressure and the Si source temperature. Tests have shown that compound clusters when deposited on a carbon substrate contain the desired low work function property and are stable up to 600.degree. C. Using the patterned cluster containing plate as a cathode baseplate and a faceplate covered with phosphor as an anode, one can apply a positive bias to the faceplate to easily extract electrons and obtain illumination.
REFERENCES:
patent: 4568853 (1986-02-01), Boutot
patent: 5666025 (1997-09-01), Geis et al.
Balooch Mehdi
Dinh Long N.
Hamza Alex V.
McLean, II William
Schildbach Marcus A.
Carnahan L. E.
Ramsey Kenneth J.
The Regents of the University of California
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