| 摘要 |
An electron emission device including a substrate, an intermediate layer overlaying the substrate and including a crater having an annular wall extending from an upper surface of the substrate along a central longitudinal axis of the crater, a catalyst film having a predetermined catalyst film diameter and disposed within the crater on the upper surface such that a catalyst central region of the catalyst film is substantially concentric to a central region of the crater along the central longitudinal axis, at least one nanotube is attached to the catalyst film at the catalyst central region and extending therefrom along the central longitudinal axis, and a gate layer overlaying the intermediate layer and including a central annular aperture having a predetermined gate layer aperture diameter formed over the crater for controlling the application of electric fields on the nanotube to control emission of electrons from the nanotube, wherein a ratio between the catalyst film diameter and the gate layer aperture diameter is in the range of 1/14 to 1/6.
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