Title:
SINTERING TYPE CATHODE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2003/015116
Kind Code:
A1
Abstract:
A sintering type cathode (C1) has a shell−shaped cathode tip end portion (35) consisting of a conical peak portion (31) provided on one edge side facing an anode and a cylindrical base portion (33) provided on the other edge side. The cathode tip end portion (35) forms an electron radiation portion for emitting electrons. The cathode tip end portion (35) contains a particle−form high−melting−point metal (41), an aluminum layer (43) covering at least part of the surface of the high−melting−point metal (41), and a metal oxide (45) as an easily electron−emitting substance. This cathode tip end portion (35) is formed by mixing into the aluminum layer (43)−coated metal (41) a compound (metal carbonate) containing a metal serving as easily electron−emitting substance and changed into a metal oxide (45) on heat treating, and sintering the mixture.
Inventors:
Kawai, Koji c/o Hamamatsu Photonics K.K. (1126-1 Ichino-ch, Hamamatsu-shi Shizuoka, 435-8558, JP)
Application Number:
PCT/JP2002/008024
Publication Date:
February 20, 2003
Filing Date:
August 06, 2002
Export Citation:
Assignee:
HAMAMATSU PHOTONICS K.K. (1126-1, Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kawai, Koji c/o Hamamatsu Photonics K.K. (1126-1 Ichino-ch, Hamamatsu-shi Shizuoka, 435-8558, JP)
Kawai, Koji c/o Hamamatsu Photonics K.K. (1126-1 Ichino-ch, Hamamatsu-shi Shizuoka, 435-8558, JP)
International Classes:
H01J1/28; H01J9/04; H01J1/20; H01J9/04; (IPC1-7): H01J1/28
Attorney, Agent or Firm:
Hasegawa, Yoshiki (SOEI PATENT AND LAW FIRM, Okura-honkan 6-12, Ginza 2-chom, Chuo-ku Tokyo, 104-0061, JP)
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