| 摘要 |
A field emission type cold cathode, a flat display and a method for a same are provided which are capable of improving controllability in formation of an emitter and of generating uniform and stable emission current. The emitter composed of a carbon nano-tube having a length being not more than, at least, a film thickness of an insulating layer is formed on a glass substrate on which a conductive layer is formed. On the emitter are stacked the insulating layer and a gate electrode layer. A part of the insulating layer and the gate electrode layer is etched to cause a gate aperture portion to be formed. The length of the carbon nano-tube is controlled so as to be smaller than that expressed by "d-Vg/Eb", where "d" represents the thickness of the insulating layer, "Vg" represents a voltage to be applied to the emitter and "Eb" represents dielectric strength.
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