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Title:
MANUFACTURE OF ELECTRODE STRUCTURE FOR ELECTRON GUN
Document Type and Number:
Japanese Patent JPS6286637
Kind Code:
A
Abstract:

PURPOSE: To secure parallel precision between bottom surfaces of both electrodes and mutual precision of an electron-beam transmitting hole, by holding the first and second bottom-equipped cylindrical electrodes in parallel at respective bottoms by vacuum absorption to form an overlapping part having a gap between mutual cylindrical parts of both electrodes, and using a method of non- contact welding with this state held.

CONSTITUTION: An upper focusing electrode 102 and a lower focusing electrode 103 are combined with a core metal 116 passing through, and they are put between substrates 211 and 212. The bottom part of the upper focusing electrode 102 and that of the lower focusing electrode 103 are attached to respectively the substrates 211 and 212 by operating a vacuum absorption equipment, both electrodes are held with sufficiently high parallel and coaxial degrees. Non- contact welding between mutual cylindrical parts is performed in this state, for example, by radiating laser light 120. Thus, regardless of parallel degree errors or the like of respective parts, parallel precision between the bottom surfaces of both electrodes and mutual precision of the electron beam- transmitting holes equipped in the bottom surfaces can be secured.


Inventors:
Nimoda, Masaru
Izumida, Yukihiro
Application Number:
JP1984000133102
Publication Date:
April 21, 1987
Filing Date:
June 29, 1984
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H01J9/18; H01J29/48; H01J29/50; (IPC1-7): H01J9/18; H01J29/50