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. 20, 2009
Filed:
Mar. 29, 2006
Tae-sik OH, Suwon-si, KR;
Tae-Sik Oh, Suwon-si, KR;
Samsung SDI Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A field emission device (FED) includes an electrostatic lens structure. The FED includes: a rear substrate; a cathode electrode on the upper surface of the rear substrate; at least one group of emitters emitting electron beams and arranged in a vertical row on the upper surface of the cathode electrode; a gate electrode placed on the upper surface of the cathode electrode to extract electrons from the emitters and having horizontal first openings respectively corresponding to the emitters; a first insulating layer interposed between the gate electrode and the cathode electrode; a focus electrode placed on the upper surface of the gate electrode and having a vertical second opening portion connected to the first opening portions of the corresponding group of emitters; a second insulating layer interposed between the focus electrode and the gate electrode; a front substrate disposed a predetermined distance above the rear substrate with an anode electrode on the lower surface thereof; and a fluorescent pattern formed on the lower surface of the anode electrode, emitting light when collided of the electron beams; with the gate electrode and the focus electrode forming a quadrupole lens structure.