Title:
ELECTRON EMISSION ELEMENT, ELECTRON SOURCE, AND IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JP3774682
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enhance the convergency of an electron beam in an electron emission element which is formed by stacking a cathode electrode, an insulating layer, and a gate electrode, and in which a through hole is formed by removing a part of the gate electrode so as to expose the cathode electrode.
SOLUTION: In the electron emission element which is formed by stacking the cathode electrode, the insulating layer, and the gate electrode, and in which the through hole is formed by removing a part of the gate electrode so as to expose the cathode electrode, only the vicinity of the center of an electron emission layer on the cathode electrode is connected to the cathode electrode. Electron beams are therefore generated only in the vicinity of the center of the electron emission layer connected to the cathode electrode, the electron emission element with a small beam diameter and an image forming device forming a fine image are provided.
Inventors:
Daisuke Sasaguri
Application Number:
JP2002174599A
Publication Date:
May 17, 2006
Filing Date:
June 14, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
H01J1/304; H01J29/04; H01J1/30; H01J3/02; H01J31/12; (IPC1-7): H01J1/304; H01J29/04; H01J31/12
Domestic Patent References:
| JP8329824A | ||||
| JP2000215792A | ||||
| JP8115654A | ||||
| JP2001118488A |
Attorney, Agent or Firm:
Kazunobu Sera
Yoshiyuki Kawaguchi
Mayuko Wakuda
Yoshiyuki Kawaguchi
Mayuko Wakuda