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:
Nov. 02, 1999
Filed:
Jan. 09, 1998
Applicant:
Inventors:
Kyu-nam Joo, Suwon, KR;
Jong-seo Choi, Anyang, KR;
Soo-chan Lee, Suwon, KR;
Deuk-il Park, Suwon, KR;
Assignee:
Samsung Display Devices Co., Ltd., Kyungki-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
3133 / ; 3133 / ;
Abstract
A cathode for an electron tube, includes a base metal having nickel as a main component, and an electron emitting material layer containing an alkaline earth metal oxide having barium oxide as a main component, wherein a metal layer having zirconium as a main component is located between the base metal and the electron emitting material layer. The cathode has an excellent initial electron emitting characteristic and can emit a large quantity of electrons for a long time. Therefore, the cathode is suitable for a larger and higher-definition CRT.