Fabrication method of field emitter electrode

Abstract

A process for fabricating a field emitter electrode includes: impregnating a cathode and anode in an electrolyte containing carbon nanotubes dispersed therein and applying a predetermined voltage to the cathode and anode so as to deposit carbon nanotubes on a substrate provided on the anode; recovering the substrate and applying a conductive polymer onto the surface of the substrate having carbon nanotubes deposited thereon; and heat treating the conductive polymer having carbon nanotubes deposited thereon, so as to completely cure it.

1 . A process for fabricating a field emitter electrode, comprising the steps of:
 impregnating a cathode and anode in an electrolyte containing carbon nanotubes dispersed therein and applying a predetermined voltage to the cathode and anode so as to deposit carbon nanotubes on a substrate provided on either of two electrodes;   recovering the substrate and applying a conductive polymer onto the surface of the substrate having carbon nanotubes deposited thereon; and   heat treating them to cure the conductive polymer.   
     
     
         2 . The process as set forth in  claim 1 , wherein the carbon nanotubes have a length of 1 to 2 μm. 
     
     
         3 . The process as set forth in  claim 1 , wherein the applied conductive polymer layer has a thickness of about 0.2 to 1 μm. 
     
     
         4 . The process as set forth in  claim 1 , wherein the conductive polymer is selected from the group consisting of polypyrrol, polyaniline, poly(3,4-ethylenedioxythiophene), polyacetylene, poly(p-phenylene), polythiophene, poly(p-phenylenevinylene) and poly(thienylene vinylene). 
     
     
         5 . The process as set forth in  claim 1 , wherein the step of applying the conductive polymer is performed by a process selected from the group consisting of spin coating, spray coating, screen printing and ink jet printing. 
     
     
         6 . The process as set forth in  claim 1 , wherein a dispersing agent is additionally added to the electrolyte in which carbon nanotubes were dispersed. 
     
     
         7 . The process as set forth in  claim 1 , wherein the dispersing agent is at least one cationic dispersing agent selected from benzene konium chloride, polyethyleneimine and magnesium chloride (MgCl 2 ), or an anionic dispersing agent such as sodium dodecyl sulfate. 
     
     
         8 . The process as set forth in  claim 7 , wherein the dispersing agent is added in an amount of about 100 wt % to about 500 wt % relative to the amount of carbon nanotubes. 
     
     
         9 . The process as set forth in  claim 1 , further comprising:
 more homogeneously dispersing the electrolyte in which carbon nanotubes were dispersed, using ultrasonic waves, prior to the step of depositing the carbon nanotubes.   
     
     
         10 . The process as set forth in  claim 1 , further comprising:
 etching the surface of the conductive polymer layer so as to sufficiently expose the carbon nanotubes.   
     
     
         11 - 21 . (canceled)