Electron emission source, electric device using the same, and method of manufacturing the electron emission source

Abstract

Provided are an electron emission source, a display apparatus using the same, an electronic device, and a method of manufacturing the display apparatus. The electron emission source includes a substrate, a cathode separately manufactured from the substrate, and a needle-shaped electron emission material layer, e.g., carbon nanotube (CNT) layer, fixed to the cathode by an adhesive layer. The CNT layer is formed by a suspension filtering method, and electron emission density is increased by a subsequent taping process on the electron emission material layer.

What is claimed is:  
     
         1 . A method of manufacturing an electron emission source, the method comprising:
 forming an electron emission material layer on a template;   transferring the electron emission material layer to a plate-shaped cathode on which an adhesive layer is formed; and   performing a surface treatment process on the electron emission material layer transferred to the cathode to erect electron emission materials with respect to the cathode.   
     
     
         2 . The method of  claim 1 , wherein the template is a filter template having filterability. 
     
     
         3 . The method of  claim 1 , wherein the forming of the electron emission material layer on the template comprises:
 applying a suspension in which electron emission materials are dispersed onto the template; and   drying the suspension.   
     
     
         4 . The method of  claim 1 , further comprising fixing the cathode to a base that supports the cathode. 
     
     
         5 . The method of  claim 1 , wherein the surface treatment process uses any one selected from the group consisting a method using an adhesive tape, a roller rubbing method, an ion beam emitting method, a plasma treatment method, a laser beam emitting method, a neutron beam emitting method, and a hydrogen gas exposing method. 
     
     
         6 . The method of  claim 3 , wherein the suspension includes a solvent and a surfactant. 
     
     
         7 . A method of manufacturing a display apparatus comprising a front plate on which an anode is formed and a substrate on which a cathode is formed, the method comprising:
 forming a plurality of electron emission material layers at predetermined intervals on a band-shaped template;   transferring the electron emission material layers to a band-shaped cathode on which an adhesive layer is formed;   performing a taping process on the electron emission material layers transferred to the cathode to erect electron emission materials with respect to the cathode; and   fixing the cathode to a rear plate.   
     
     
         8 . The method of  claim 7 , wherein the template is a filter template having filterability. 
     
     
         9 . The method of  claim 7 , wherein the forming of the plurality of electron emission material layers on the template comprises:
 applying a suspension in which electron emission materials are dispersed onto the template; and   drying the suspension.   
     
     
         10 . The method of  claim 7 , wherein an adhesive layer to which the electron emission material layers are fixed is formed on a side surface of the cathode.