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. 23, 2021
Filed:
Dec. 09, 2019
Denka Company Limited, Tokyo, JP;
Toshiyuki Morishita, Shibukawa, JP;
Hiromitsu Chatani, Shibukawa, JP;
Shimpei Hirokawa, Shibukawa, JP;
Toshiyuki Ibayashi, Shibukawa, JP;
Isao Sugimoto, Shibukawa, JP;
Denka Company Limited, Tokyo, JP;
Abstract
An electron source capable of suppressing consumption of an electron emission material is provide. The present invention provides an electron source including: an electron emission material; and, an electron emission-suppressing material covering a side surface of the electron emission material, wherein a work function of the electron emission-suppressing material is higher than that of the electron emission material, and a thermal emissivity of the electron emission-suppressing material is lower than that of the electron emission material.