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:
Mar. 10, 2020
Filed:
Nov. 24, 2016
Hitachi High-technologies Corporation, Minato-ku, Tokyo, JP;
Toshiaki Kusunoki, Tokyo, JP;
Tomihiro Hashizume, Tokyo, JP;
Keigo Kasuya, Tokyo, JP;
Takashi Ohshima, Tokyo, JP;
Yusuke Sakai, Tokyo, JP;
Yoichi Ose, Tokyo, JP;
Noriaki Arai, Tokyo, JP;
Hitachi High-Technologies Corporation, Tokyo, JP;
Abstract
In order to provide a stable hexaboride single-crystal field emission electron source capable of heat-flashing, this field emission electron source is provided with a metal filament, a metal tube joined thereto, a hexaboride tip that emits electrons, and graphite sheets that are independent of the metal tube and the hexaboride tip. The hexaboride tip is arranged so as not to be in structural contact with the metal tube due to the graphite sheets. The hexaboride tip, the graphite sheets, and the metal tube are configured so as to be mechanically and electrically in contact with one another.