ELECTRON-EMITTING ELEMENT, ELECTRON BEAM DEVICE, AND IMAGE DISPLAY DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a new electron beam device wherein instability of electron emission characteristics is improved and highly efficient electron emission characteristics are provided.

SOLUTION: The electron beam device comprises an insulating member having a recessed section on the surface, a cathode having a projection located astride an outer surface of the insulating member and an inner surface of the recessed section, a gate located on the outer surface of the insulating member in opposition to the projection, and an anode located in opposition to the projection via the gate.

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