Title:
CATHODE FOR ELECTRON TUBE
Document Type and Number:
Japanese Patent JP2001345041
Kind Code:
A
Abstract:
To restrain fluctuations of cutoff voltage by realizing a high current density in a cathode for electron tube, and suppress changes of luminance.
The main component of the cathode for the electron tube is made by nickel. On a substrate which contains at least a kind of reducer, a porous metal layer is formed that has tungsten as the main component and that has the thickness of 80 μm or less, and the porosity of 20 to 70%, and further an electron emission substance layer is equipped that has alkaline-earth metal oxides as the main component containing at least barium.
Inventors:
OHIRA TAKUYA
TERAMOTO HIROYUKI
FUKUYAMA KEIJI
SAITO KIYOSHI
TERAMOTO HIROYUKI
FUKUYAMA KEIJI
SAITO KIYOSHI
Application Number:
JP2000164581A
Publication Date:
December 14, 2001
Filing Date:
June 01, 2000
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H01J1/20; H01J1/142; H01J1/26; H01J29/04; (IPC1-7): H01J1/20; H01J29/04
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)
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