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:
Apr. 29, 2003
Filed:
Mar. 10, 2000
Applicant:
Inventors:
Duk-sung Park, Suwon, KR;
Sang-kyun Kim, Seoul, KR;
Bong-wook Jung, Seoul, KR;
Chul-sik Cho, Chungcheongnam-do, KR;
Assignee:
Samsung SDI Co., Ltd., Kyungki-do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 2/948 ;
U.S. Cl.
CPC ...
H01J 2/948 ;
Abstract
A final focus electrode includes a cylindrical base on one end and a conical portion on the other end such that the diameter of the conical portion is greater than that of the base and also gradually increases with distance from the base. The conical portion of the final focus electrode is located inside a cylindrical accelerating electrode such that it is coaxially surrounded by the latter.