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:
Jan. 02, 1996
Filed:
Sep. 08, 1994
Applicant:
Inventors:
Jong-deuk Lee, Seoul, KR;
Hyeong-su Woo, Bucheon, KR;
Sun-jeong Choi, Suwon, KR;
Gang-ok Lee, Suwon, KR;
Assignee:
Samsung Display Devices Co., Ltd., Kyungki-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313309 ; 313351 ; 445 50 ;
Abstract
A field emission cathode and a method of manufacturing a field emission cathode, wherein a primitive tip is formed under a first thermal oxide layer, and a nitride layer is formed on the surface of the first thermal oxide layer covering the primitive tip so that only the lower portion of the tip is oxidized without the upper portion of the tip being oxidized by a second thermal oxidation process. The method can attain a constant and controllable tip height.