Field emission cathode device and field emission display using the same

A field emission display, comprising:

• a field emission cathode device comprising an insulating substrate;
• a plurality of cathodes mounted on the insulating substrate;
• and a plurality of field emission units mounted on the cathodes;
• a dielectric layer consisting of an upper section dielectric layer and a lower section dielectric layer, and the lower section dielectric layer located on the insulating substrate and defining a plurality of voids corresponding to the field emission units;
• a plurality of grids disposed between the upper section dielectric layer and the lower section dielectric layer, wherein each grid is secured by the upper section dielectric layer and the lower section dielectric layer, and the plurality of grids extends over the plurality of voids;
• and
• an anode electrode device, wherein the anode electrode device and the grids have a distance therebetween.

A field emission cathode device, comprising:

• an insulating substrate;
• a plurality of cathodes located on the insulating substrate;
• a plurality of field emission units located on the cathodes;
• a dielectric layer located on the insulating substrate and defining a plurality of voids corresponding to the field emission units;
• and
• a plurality of grids inserted into the dielectric layer to divide the dielectric layer to form an upper section dielectric layer and a lower section dielectric layer, wherein each grid is secured by the upper section dielectric layer and the lower section dielectric layer, each grid being a mesh defining a plurality of holes, each of the plurality of voids corresponding to more than one hole.