Cathode for electron tube and method for manufacturing the same

Details Cathode for electron tube and method for manufacturing the same Cathode for electron tube and method for manufacturing the same

2006-11-21

2006-11-21

Guharay, Karabi (Department: 2879)

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

C313S337000

Reexamination Certificate

active

07138754

ABSTRACT:
An oxide cathode for an electron tube and a method for manufacturing the oxide cathode are provided. In the oxide cathode including a sleeve for a heater, a metal substrate formed on the top of the sleeve, and an electron emission material layer coated on the metal substrate, the electron emission material layer is formed by coating a carbonate paste containing an alkaline earth metal carbonate, an organic blowing agent, and a vehicle on the metal substrate by screen printing, and thermally treating the coated carbonate paste. Picture quality degradation due to a Moire phenomenon is reduced by coating the carbonate paste by screen printing to provide an even cathode surface, and degradation of the cathode by Joule heat is reduced, thereby improving electron emission and lifespan characteristics of the cathode.

REFERENCES:
patent: 5757115 (1998-05-01), Narita et al.
patent: 6351061 (2002-02-01), Yamauchi et al.
patent: 2002/0163308 (2002-11-01), Gaertner et al.
patent: 0 421 372 (1991-04-01), None
patent: 0560436 (1993-09-01), None
patent: 53-91562 (1978-11-01), None
patent: 6-28968 (1994-02-01), None
patent: 2001-229814 (2001-08-01), None
patent: 1999-53587 (1999-07-01), None
“Progress on the Percolation Cathode” by S.N.B. Hodgson et al. (IDW '99 Proceedings of the Sixth International Display Workshops CRT 6-4 (Late-News Paper)).
Notice to Submit Response, issued by the Korean Industrial Property Office on Jan. 30, 2004.

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