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:
May. 20, 2008
Filed:
Feb. 22, 2001
Hiroshi Ohki, Tokyo, JP;
Tsunaki Tsunesada, Suita, JP;
Masao Urayama, Tenri, JP;
Takashi Kyotani, Natori, JP;
Keitarou Matsui, Sendai, JP;
Akira Tomita, Sendai, JP;
Hiroshi Ohki, Tokyo, JP;
Tsunaki Tsunesada, Suita, JP;
Masao Urayama, Tenri, JP;
Takashi Kyotani, Natori, JP;
Keitarou Matsui, Sendai, JP;
Akira Tomita, Sendai, JP;
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Abstract
A carbon nanotube has a carbon network film of polycrystalline structure divided into crystal regions along the axis of the tube, and the length along the tube axis of each crystal region preferably ranges from 3 to 6 nm. An electron source includes a carbon nanotube having a cylindrical shape and the end of which on the substrate side is closed and disposed in a fine hole. The end on the substrate side of the tube is firmly adhered to the substrate. The carbon nanotube is produced by a method in which carbon is deposited under the condition that no metal catalyst is present in the fine hole and produced by a method in which after the carbon deposition the end of the carbon deposition film is modified by etching the carbon deposition film using a plasma. Therefore, an electron source excellent in the evenness of field emission characteristics in a field emission region (pixel) in the device plane and driven with low voltage can be provided, and a display operated with ultralow power consumption exhibiting ultrahigh luminance can be provided.