Title:
ELECTRODE FOR DISCHARGE TUBE AND DISCHARGE TUBE USING IT
Document Type and Number:
WIPO Patent Application WO/2000/045418
Kind Code:
A1
Abstract:
A discharge tube (10) comprising a glass bulb (12), a cathode (14) and an anode (16), wherein the cathode (14) comprises a cathode tip end (22) and a lead bar (24). The lead bar (24) has a cylindrical shape formed of Mo and is formed at one end face (24a) thereof with a cylindrical projection (24b). The cathode tip end (22) is formed by impregnating Ba into porous tungsten, and has a conical steeple (22a) at one end side facing the anode (16) and a cylindrical insertion hole (22d) for receiving the projection (24b) of the lead bar (24) at an end face (22c) on the other end side thereof. A gap between the end face (24a) of the lead bar (24) and the end face (22c) of the cathode tip end (22) is filled with an Mo-Ru brazing filler metal (26).
Inventors:
Harada, Nobuharu (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Ishihara, Syoji (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Ishihara, Syoji (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Application Number:
PCT/JP2000/000383
Publication Date:
August 03, 2000
Filing Date:
January 26, 2000
Export Citation:
Assignee:
HAMAMATSU PHOTONICS K.K. (1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Harada, Nobuharu (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Ishihara, Syoji (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Harada, Nobuharu (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
Ishihara, Syoji (Hamamatsu Photonics K.K. 1126-1, Ichino-cho Hamamatsu-shi Shizuoka-ken, 435-8558, JP)
International Classes:
H01J61/06; H01J9/02; H01J17/06; H01J61/073; H01J9/02; H01J17/04; H01J61/06; (IPC1-7): H01J61/073
Attorney, Agent or Firm:
Hasegawa, Yoshiki (Soei Patent and Law Firm Okura-Honkan 6-12, Ginza 2-chome Chuo-ku Tokyo, 104-0061, JP)
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