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:
Jan. 31, 2017
Filed:
Jan. 07, 2016
Fred Sharifi, Kirkland, WA (US);
Henry Lezec, Bethesda, MD (US);
Myung-gyu Kang, Gaithersburg, MD (US);
Fred Sharifi, Kirkland, WA (US);
Henry Lezec, Bethesda, MD (US);
Myung-Gyu Kang, Gaithersburg, MD (US);
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF COMMERCE, THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, Washington, DC (US);
UNIVERSITY OF MARYLAND, College Park, MD (US);
Abstract
A cold cathode field emission electron source capable of emission at levels comparable to thermal sources is described. Emission in excess of 6 A/cmat 7.5 V/μm is demonstrated in a macroscopic emitter array. The emitter has a monolithic and rigid porous semiconductor nanostructure with uniformly distributed emission sites, and is fabricated through a room temperature process which allows for control of emission properties. These electron sources can be used in a wide range of applications, including microwave electronics and x-ray imaging for medicine and security.