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:
Jul. 18, 2006
Filed:
Sep. 27, 2001
Tetsuya Ide, Kanagawa, JP;
Junichi Sawahata, Mie, JP;
Masao Urayama, Saitama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A cold-cathode electron source having an improved utilization efficiency of an electron beam and a simple structure. The cold-cathode electron source comprises a gate electrode () provided on a substrate () through an insulating layer () and an emitter () extending through the insulating layer () and the gate electrode () and disposed in an opening of the gate. During the emission of electrons from the emitter (), the following relationships are satisfied: 10 [V/μm]≧(Va−Vg)/(Ha−Hg)≧Vg/Hg; and Vg/Hg [V/μm]≧Va×10×(9.7−1.3×1n(Hg))×(1000/Ha), where Ha [μm] is an anode-emitter distance, Va [V] is an anode-emitter voltage, Hg [μm] is a gate-emitter distance, and Vg [V] is a gate-emitter voltage.