Carbon nanotube field emission display

Abstract

A carbon nanotube (CNT) field emission display has a cathode substrate having a cathode layer patterned on a glass substrate. The surface of the cathode layer is defined as a plurality of electron-emitting areas apart from each other, and a plurality of CNT structures is grown on the plurality of electron-emitting areas respectively.

What is claimed is:  
     
         1 . A cathode substrate of a carbon nanotube (CNT) field emission display, comprising: 
 a glass substrate;    a cathode layer formed overlying the glass substrate, wherein the surface of the cathode layer is defined as a plurality of electron-emitting areas spaced apart from each other;    an insulating layer formed overlying the glass substrate and having an opening, wherein the opening exposes the cathode layer;    a gate electrode layer formed overlying the top of the insulating layer and exposing the cathode layer; and    a CNT structure formed overlying the cathode layer, wherein the CNT structure comprises a plurality of sub-CNT structures arranged in array;    wherein, the sub-CNT structures are formed overlying the plurality of electron-emitting areas respectively; and    wherein, the sub-CNT Structures are spaced apart from each other without the insulating layer therebetween.    
     
     
         2 . The cathode substrate according to  claim 1 , wherein the interval of two adjacent electron-emitting areas is 80˜150 μm.  
     
     
         3 . The cathode substrate according to  claim 2 , wherein the profile of the electron-emitting area is quadrilateral, circular or any other physical appearance.  
     
     
         4 . A cathode substrate of a carbon nanotube (CNT) field emission display, comprising: 
 a glass substrate;    a cathode layer formed overlying the glass substrate, wherein the surface of the cathode layer is defined as a plurality of electron-emitting areas spaced apart from each other, and the electron-emitting areas are uniform and arranged in array;    an insulating layer formed overlying the glass substrate and having an opening, wherein the opening exposes the cathode layer;    a gate electrode layer formed overlying the top of the insulating layer and exposing the cathode layer; and    a CNT structure formed overlying the cathode layer, wherein the CNT structure comprises a plurality of sub-CNT structures arranged in array;    wherein, the sub-CNT structures are formed overlying the plurality of electron-emitting areas respectively, such that an edge effect is formed at the periphery of each sub-CNT structures; and    wherein, the sub-CNT Structures are spaced apart from each other without the insulating layer therebetween.    
     
     
         5 . The cathode substrate according to  claim 4 , wherein the profile of the electron-emitting area is quadrilateral, circular or any other physical appearance.