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:
Apr. 30, 2019
Filed:
Sep. 16, 2016
Nec Network and Sensor Systems, Ltd., Tokyo, JP;
Yukihira Nakazato, Tokyo, JP;
Eiji Fujiwara, Tokyo, JP;
NEC NETWORK AND SENSOR SYSTEMS, LTD., Fuchu-shi, Tokyo, JP;
Abstract
The purpose is to make it possible to autonomously suppress a reduction in an electron beam without providing a means for supervising the electron beam intensity of a monitor or the like. An electron gun, provided with: a heater () in which one terminal serves as a heater terminal (H) and the other terminal serves as a shared terminal (HK), and in which a low-voltage power supply () is connected between the terminals, the heater () generating heat due to a current being supplied from the low-voltage power supply (); and a cathode electrode () connected to the shared terminal (HK) and heated by the heater () to discharge thermal electrons. A cathode current (Ik) due to the thermal electrons discharged from the cathode electrode (), and a current (Ih) due to the low-voltage power supply, flow in opposite directions through the heater ().