Title:
ELECTRON EMISSION ELEMENT AND ELECTRON EMISSION ELEMENT MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2005/122204
Kind Code:
A1
Abstract:
An electron emission element (10A) includes an emitter (12) formed by a dielectric body, an upper electrode (14) and a lower electrode (16) to which a drive voltage Va for emitting electrons is applied. The upper electrode (14) is formed by scale-shaped conductive particles on the upper surface (12a) of the emitter (12) and has a plurality of openings (20). The portion of the upper electrode (14) opposing to the emitter (12) in the circumferential portion (26) of the openings (20) is apart from the emitter (12). Moreover, a circumferential portion (26) of the openings (20) has an acute angle shape, in a cross sectional view, toward the inner brim (26b) of the openings (20) as the tip end of the circumferential portion (26), i.e., a shape in which electric lines of force are concentrated. With the aforementioned configuration, it is possible to increase the electron emission amount as compared to the conventional electron emission element.
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Inventors:
Ohwada, Iwao c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Sato, Kei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Kobayashi, Nobuyuki c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Yokoyama, Shohei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Sato, Kei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Kobayashi, Nobuyuki c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Yokoyama, Shohei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Application Number:
PCT/JP2004/019808
Publication Date:
December 22, 2005
Filing Date:
December 27, 2004
Export Citation:
Assignee:
NGK INSULATORS, LTD. (2-56, Suda-cho Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Ohwada, Iwao c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Sato, Kei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Kobayashi, Nobuyuki c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Yokoyama, Shohei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Ohwada, Iwao c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Sato, Kei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Kobayashi, Nobuyuki c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
Yokoyama, Shohei c/o NGK Insulators Ltd. (2-56, Suda-cho, Mizuho-k, Nagoya-shi Aichi, 467-8530, JP)
International Classes:
H01J1/312; H01J1/32; H01J9/02; H01J29/04; H01J31/12; (IPC1-7): H01J1/312; H01J9/02; H01J29/04; H01J31/12
Attorney, Agent or Firm:
Prospec, Patent Firm (12th Floor, Nagoya-KS Building 1-18, Taiko 3-chome, Nakamura-k, Nagoya-shi Aichi, 453-0801, JP)
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