Title:
Hot cathode, an electron emission device, and a manufacturing method of hot cathode
Document Type and Number:
Japanese Patent JP6212327
Kind Code:
B2
Abstract:
An improved cathode comprises a cone-shaped emitter with a carbon-based coating applied to the emitter cone surface, in which there is a narrow annular gap between the emitter body and the carbon coating. The gap prevents direct contact between the carbon coating and the crystalline emitting material, thereby preventing damaging interactions and extending the useful lifetime of the cathode.
Inventors:
Victor Katzap
Application Number:
JP2013172358A
Publication Date:
October 11, 2017
Filing Date:
August 22, 2013
Export Citation:
Assignee:
New Flare Technology Co., Ltd.
International Classes:
H01J1/16; H01J9/04
Domestic Patent References:
| JP2005190758A | ||||
| JP2006518109A |
Foreign References:
| US20040150322 |
Attorney, Agent or Firm:
Tetsuma Ikegami
Akira Sudo
Mitsuyuki Matsuyama
Akira Sudo
Mitsuyuki Matsuyama