Cathode plate of a carbon nano tube field emission display and its fabrication method

A method for fabricating a cathode plate of a carbon nano tube field emission display, said method comprising the steps of:

• (a) providing a transparent substrate;
• (b) depositing a layer of photoconductive paste on said transparent substrate, patterning said layer of photoconductive paste using a photolithography process, and sintering to form a cathode electrode layer;
• (c) printing a carbon nano tube emission layer on said cathode electrode layer by a screen printing method;
• (d) depositing a layer of etchable dielectric material on said carbon nano tube emission layer, said cathode electrode layer and said transparent substrate;
• (e) depositing a layer of photoconductive gate material on said layer of dielectric material, patterning said layer of photoconductive gate material using a photolithography process, and sintering to form a gate electrode layer;
• and
• (f) using said gate electrode layer as a protecting film to etch said layer of dielectric material with a photolithography process and expose said carbon nano tube emission layer above said cathode electrode layer, and sintering to remove residual organic materials in each layer.

A cathode plate of a carbon nano tube field emission display comprising:

• a transparent substrate;
• a cathode electrode layer having a plurality of parallel cathode electrode strips formed on said transparent substrate;
• a dielectric layer formed on said cathode electrode layer and said transparent substrate, said dielectric layer having a plurality of parallel dielectric strips perpendicular to said cathode electrode strips, and a plurality of circular holes each being formed at an intersection of a dielectric strip and a cathode electrode strip;
• a gate electrode layer formed on said dielectric layer, said gate electrode layer having a plurality of parallel electrode strips perpendicular to said cathode electrode strips, and a plurality of circular holes above said circular holes of said dielectric layer;
• and
• a carbon nano tube emission layer formed in said circular holes of said dielectric layer on said cathode electrode layer.