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. 17, 2001
Filed:
Oct. 01, 1998
Masaharu Tomita, Mobara, JP;
Shigeo Itoh, Mobara, JP;
Kazuhiko Tsuburaya, Mobara, JP;
Kazuyuki Yano, Mobara, JP;
Futaba Denshi Kogyo Kabushiki Kaisha, Mobara, JP;
Abstract
A field emission device capable of permitting a focusing electrode to be arranged around a gate electrode without any restriction. A gate electrode is arranged on an upper surface of an insulating layer of a cathode substrate-side structure and holes are formed through the insulating layer and gate electrode. A conical emitter is arranged in each of the holes. The insulating layer is formed on the upper surface thereof with a focusing electrode so as to surround the gate electrode. The insulating layer is formed on a lower surface thereof with a connection line, a resistive layer and a cathode electrode line. The gate electrode is electrically connected to the connection line through a contact hole and a gate electrode line is electrically connected to the connection line through another contact hole.