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:
Aug. 31, 2004
Filed:
Apr. 03, 2003
FutubaCorporation, Chiba, JP;
Abstract
A field emission element includes a substrate, a cathode conductor disposed on the substrate, an insulating layer structure on the cathode conductor that has a first insulating layer on the cathode conductor and a second insulating layer on the first insulating layer, a gate disposed on the second insulating layer, a gate hole provided through the gate and the insulating layer structure to expose a portion of the cathode conductor therethrough, and an emitter on the exposed portion of the cathode conductor in the gate hole. The first insulating layer is covered by the second insulating layer at a side surface of the gate hole and a dielectric constant of the first insulating layer is different from that of the second insulating layer.