Patent ID: 7067971

Claim:
A field emission element having a gate electrode stacked on a substrate, an emitter electrode stacked on the gate electrode via an interlayer insulating layer, and an anode electrode formed on another substrate facing the emitter electrode, the field emission element comprising: an anode pixel formed by the anode electrode and a generally rectangular fluorescent body formed thereon; and a plurality of wells, each being formed in the emitter electrode and the interlayer insulating layer in a form of a narrow elongated hole, wherein the wells are disposed within a generally rectangular electron emitting area and at least a majority of the wells are arranged parallel to each other, wherein a length direction of the majority of the wells is substantially normal to that of the fluorescent body and the electron emitting area, and the majority of wells generally form a line, and wherein when overlapping the electron emitting area on the fluorescent body along a direction normal to a main surface of said another substrate, a first distance between neighboring shorter sides of the electron emitting area and the fluorescent body is greater than a second distance between neighboring longer sides of the electron emitting area and the fluorescent body.