Patent ID: 7714493

Claim:
A field emission display device comprising: a plurality of spaced cathode electrodes; a plurality of gate electrodes, each of the gate electrodes having a first bottom surface; a separator disposed between the cathode electrodes and the gate electrodes for insulating the cathode electrodes and the gate electrodes, a plurality of conductive portions embedded in the separator; a plurality of emissive units disposed at and spacedly closing opposite sides of each of the gate electrodes, the emissive units being arranged on the separator and electrically connecting with the cathode electrodes via the conductive portions respectively, each of the emissive units having a second bottom surface; an anode electrode spaced from the cathode electrodes; and a phosphor layer attached to the anode electrode and comprising a plurality of spaced pixel structures, each pixel structure comprising a plurality of picture elements each corresponding to one of the gate electrodes and the emissive units disposed at and spacedly closing opposite sides of the gate electrode; wherein the second bottom surface of each of the emissive units is substantially coplanar with the first bottom surface of the corresponding gate electrode; wherein each of the emissive units which are located at one common side of one of the gate electrodes and electrically connect with the cathode electrodes, directly aligns with a corresponding emissive unit located at opposite side to the common side; wherein each of the emissive units has an inner periphery with a first diameter and an outer periphery with a second diameter, and each of the conductive portions has a third diameter larger than the first diameter but smaller than the second diameter, and each of the conductive portions is positioned under and within an area defined by the outer periphery of one corresponding emissive unit.