Title:
FIELD EMISSION COLD CATHODE
Document Type and Number:
Japanese Patent JP3777735
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a field emission cold cathode in which a high density electron current can be obtained, and of which manufacture is easy.
SOLUTION: Plural micro-field emission cathodes are disposed as concentric circles on a substrate, and rings of deflection electrodes 8, 9, 10... are provided to enclose the respective concentric circles. The rings of the delection electrodes 8-10 are connected to each other through resistances 11, the deflection electrode 8 as the innermost circle is connected to a gate electrode 5 of the micro-field emission cathode, and the ring of the deflection electrode 10 as the outermost circle is connected to a negative voltage source. For the rings of the deflection electrodes 8-10, therefore, a lower voltage is applied to one than that applied on one on the inner circumferential side of it, and a negative potential gradient is generated from a center part toward the outer circumferential part, thereby electrons field-emitted from a cone emitter 6 of the micro-field emission cathode are converged to a center part.
Inventors:
Shigeo Ito
Application Number:
JP22482297A
Publication Date:
May 24, 2006
Filing Date:
August 21, 1997
Export Citation:
Assignee:
Futaba Electronics Co., Ltd.
International Classes:
H01J3/34; H01J1/30; H01J1/304; (IPC1-7): H01J1/30; H01J3/34
Domestic Patent References:
| JP1159957A | ||||
| JP8236014A | ||||
| JP5266787A | ||||
| JP61203547A | ||||
| JP6295678A |
Foreign References:
| WO1995026037A1 |
Attorney, Agent or Firm:
Atsuo Waki
Yasuo Asami
Hideo Takahashi
Yasuo Asami
Hideo Takahashi