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:
Sep. 24, 2002
Filed:
Mar. 29, 2000
Satoshi Nakada, Kanagawa, JP;
Eisuke Negishi, Tokyo, JP;
Sony Corporation, , JP;
Abstract
An electron emission source includes a plurality of strip-like cathode electrode lines formed on a lower substrate, an insulating layer formed on the cathode electrode lines; and a plurality of strip-like gate electrode lines formed on the insulating layer in such a manner as to intersect the cathode electrode lines, wherein a number of fine holes are formed in each of intersections between the cathode electrode lines and the gate electrode lines. The intersection forms a pixel region corresponding to one pixel of a display. The fine holes pass through the gate electrode lines and the insulating layer and reach the cathode electrode lines. A metal made projecting structure having a trapezoidal shape in cross-section is formed in each of the fine holes in such a manner as to project from the bottom of the fine hole. An electron emission portion on the surface of which carbon nano-tubes are erected is formed on the upper surface of the projecting structure. Such an electron emission source is effective to realize a low voltage drive, make the current amount uniform, avoid the extension of electron beams, prolong the service life, and prevent occurrence of short-circuit between the electrodes upon production.