Title:
電子管用カソードの製造方法
Document Type and Number:
Japanese Patent JP7025816
Kind Code:
B2
Abstract:
To provide a manufacturing method of a cathode for an electron tube equipped with a cathode sleeve that absorbs radiant heat from a heater efficiently.SOLUTION: A manufacturing method of a cathode for an electron tube includes a step of forming a first metal film on the surface of a hollow portion of a cathode sleeve 1 for adhering or impregnating the surface with a thermionic emission material and disposing a heater 4 in the hollow portion, and a step of forming a second metal film 6 obtained by changing the first metal film by heating the first metal film, and when the second metal film 6 is formed, a metal having many voids is formed by the heat treatment.SELECTED DRAWING: Figure 2
Inventors:
Hideyuki Obata
Hiroyuki Miyamoto
Yasui Yasui
Hiroyuki Miyamoto
Yasui Yasui
Application Number:
JP2017183802A
Publication Date:
February 25, 2022
Filing Date:
September 25, 2017
Export Citation:
Assignee:
New Japan Radio Microdevices Co., Ltd.
International Classes:
H01J9/04; H01J23/05; H01J25/50
Domestic Patent References:
| JP8287824A | ||||
| JP61288339A | ||||
| JP61211932A |