Title:
ROD FOR ELECTRON SOURCE, ELECTRON SOURCE, AND ELECTRONIC APPLIANCE
Document Type and Number:
WIPO Patent Application WO/2011/040326
Kind Code:
A1
Abstract:
Provided is an electron source which works at lower temperatures and which has a narrower energy spread and a low work function.
The electron source is characterized by being equipped with an insulator, two conductive terminals attached to the insulator, a filament attached to the conductive terminals so as to connect the conductive terminals, and a rod attached to the filament and constituted of a <100>-orientation single crystal of at least one metal selected from a group consisting of tungsten, molybdenum, tantalum, and rhenium. The electron source is further characterized in that the rod has, formed at the tip, an electron-emitting surface with an exposed {100} crystal plane, that the rod has a diffusion source attached to the middle of the rod, and that the diffusion source comprises a composite oxide formed from barium oxide and scandium oxide, the proportion of the barium oxide used for forming the composite oxide being 50 mol% or more in terms of BaO and the proportion of the scandium oxide used therefor being 10-50 mol% in terms of Sc2O3.
Inventors:
MORISHITA Toshiyuki (1135 Nakamura, Shibukawa-cit, Gunma 20, 〒3778520, JP)
Application Number:
JP2010/066534
Publication Date:
April 07, 2011
Filing Date:
September 24, 2010
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA (1-1 Nihonbashi-Muromachi 2-chome, Chuo-ku Tokyo, 38, 〒1038338, JP)
電気化学工業株式会社 (〒38 東京都中央区日本橋室町二丁目１番１号 Tokyo, 〒1038338, JP)
電気化学工業株式会社 (〒38 東京都中央区日本橋室町二丁目１番１号 Tokyo, 〒1038338, JP)
International Classes:
H01J1/304; H01J37/073
Attorney, Agent or Firm:
WATANABE Kaoru (KUNPU INTELLECTUAL PROPERTY AGENTS, SUCCESS-SENGAKUJI BLDG. 3F 2-20-29, Takanawa, Minato-k, Tokyo 74, 〒1080074, JP)
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