Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CATHODE DEVICE
Document Type and Number:
Japanese Patent JPH0696663
Kind Code:
A
Abstract:

PURPOSE: To maintain good electrical separation between adjacent cathode lines by providing a structure to raise a threshold voltage value for inducing electrons on field surface between adjacent emitter lines.

CONSTITUTION: Emitter cones 9 are formed on a semiconductor substrate 1, and a gate electrode 8 having such an open section as surrounding the end of the cones 9 at intervals is formed on the insulation film of the substrate 1. Also, the emitter cones 9 are divided into segments 10 in such a way that at least one segment 10 forms a constituent unit, and feeder gate electrodes and emitter lines 11 are formed for the independent matrix drive of the segments 10. Furthermore, a structure 3 is provided for raising a threshold voltage value to induce electrons on field surface between an emitter line 11 under voltage application and another emitter line 11 adjacent thereto, when operation voltage is applied to a gate electrode line and the emitter lines 11.


Inventors:
Toyoda, Osamu
Betsui, Keiichi
Fukuda, Shinya
Application Number:
JP1992000246662
Publication Date:
April 08, 1994
Filing Date:
September 16, 1992
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUJITSU LTD
International Classes:
H01J1/304; (IPC1-7): H01J1/30
Attorney, Agent or Firm:
青木 朗 (外2名)