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. 25, 2004
Filed:
Jul. 21, 2000
Tetsuya Ide, Kanagawa, JP;
Masao Urayama, Saitama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Disclosed is a cold cathode electron source characterized in that a cold cathode material which can achieve electron emission in a low electric field (e.g., a carbon nanotube), necessary constituent elements are provided individually in uncalcined ceramic sheets (green sheets ) and the sheets are laminated and calcined to form an integral structure. The electron source can be manufactured by forming through-holes in a flat plate, charging a conductive paste containing carbon nanotubes dispersed therein into the through-holes by vacuum suction, thereby causing to orient the carbon nanotubes in the axis direction of the through-hoes . The electron source is useful for the low-cost manufacture of a device with a cold cathode electron source which can achieve ready vacuum evacuation and maintenance of the vacuum level, as well as a high emission current density at a low voltage.