Patent ID: 7427826

Claim:
An electron beam apparatus comprising: a rear plate comprising a plurality of electron-emitting devices each comprising a pair of device electrodes, a plurality of first wirings each of which is connected to one of the pair of device electrodes of the electron-emitting device, and a plurality of second wirings each of which is connected to the other of the pair of device electrodes, wherein the second wirings cross the first wirings sandwiching an insulating layer therebetween; and a face plate, comprising an anode electrode, disposed in opposition to said rear plate, and irradiated with electron emitted from said electron-emitting device; wherein at least one of said pair of device electrodes has a portion covered with said insulating layer and connected to said first or second wirings, an additional electrode is electrically connected to the device electrode covered with the insulating layer and the additional electrode meets following formulas (a) to (c): Ee=P×Cp×ρ×Tm (a) Ea=R×I 2 ×t 1 (b) Ee>Ea (c) P: volume [m 3 ] Cp: specific heat [J/kgK] ρ: density [kg/m 3 ] Tm: melting point [K] R: resistance [ 106 ] I: permissible current value [A] t 1 : duration of electric discharging [sec].