Field emission cathode device

Details Field emission cathode device Field emission cathode device

1994-09-27

1997-01-14

Patel, Nimeshkumar

Electric lamp and discharge devices

Electrode and shield structures

Point source cathodes

313309, 313351, H01J 130

Patent

active

055942989

ABSTRACT:
A field emission cathode device capable of permitting when short-circuiting occurs between any of emitters and a gate, a block in which the block is formed to be separated from the remaining blocks and preventing a material fused at the time of the short-circuiting from scattering. A cathode conductor arranged on a substrate is formed with a plurality of cutouts, in which resistive layers are arranged. The resistive layers each are provided with terminals through which the resistive layer is connected to the cathode conductor. An insulating layer is arranged so as to cover the resistive layers and cathode conductor and a plurality of emitters are formed on each of the resistive layers. A gate conductor is formed on the insulating layer so as to be positioned around a distal end of each of the conical emitters. Short-circuiting between any of the emitters and the gate conductor causes the terminals to be fused. The insulating layer prevents the fused material from scattering.

REFERENCES:
patent: 4940916 (1990-07-01), Borel et al.
patent: 5142184 (1992-08-01), Kane
patent: 5189341 (1993-02-01), Itoh et al.
patent: 5194780 (1993-03-01), Meyer
patent: 5256936 (1993-10-01), Itoh et al.

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