The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2001
Filed:
Mar. 17, 1999
Applicant:
Inventors:
Osamu Nakamura, Kodaira, JP;
Shigemi Suzuki, Yokohama, JP;
Yuichi Mori, Toda, JP;
Hironori Hirama, Machida, JP;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/30 ; H01J 1/316 ;
U.S. Cl.
CPC ...
H01J 1/30 ; H01J 1/316 ;
Abstract
An yttrium film is formed on the surface of a substrate made of an Ni—Cr-based material by deposition or sputtering using resistance heating or an electron beam. The yttrium film is heated in an inert gas atmosphere containing a very small amount of hydrogen to hydrogenate yttrium. The resultant yttrium hydride is excellent as a cold emission material for a cold emission electrode and can be used for a cold emission discharge fluorescent tube.