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:
Jun. 19, 2007
Filed:
Oct. 17, 2003
Shang-hyeun Park, Chungcheongnam-do, KR;
Hang-woo Lee, Kyungki-do, KR;
You-jong Kim, Seoul, KR;
Pil-soo Ahn, Kyungki-do, KR;
Shang-hyeun Park, Chungcheongnam-do, KR;
Hang-woo Lee, Kyungki-do, KR;
You-jong Kim, Seoul, KR;
Pil-soo Ahn, Kyungki-do, KR;
Samsung SDI Co., Ltd., Suwon, Kyungki-do, KR;
Abstract
The field emission device includes a substrate, a cathode, a gate insulating layer, an electron emitter, and a gate electrode. The cathode is formed on the substrate. The gate insulating layer is formed on the cathode and has a well exposing a portion of the cathode. The electron emitter is formed on the exposed portion of the cathode. The gate electrode is formed on the gate insulating layer and has a gate hole corresponding to the well. The gate electrode further includes a cylindrical electrode part that forms a focusing electric field from the gate hole toward a proceeding path of an electron beam. Accordingly, a focusing electric field can be formed around an electron beam emitted from the electron emitter so as to converge and focus the electron beam passing through the focusing electric field. As a result, color purity, brightness, and durability can be improved.