FABRICATION METHOD OF FIELD EMITTER ELECTRODE

• US 20080293321A1
• Filed: 07/23/2008
• Published: 11/27/2008
• Est. Priority Date: 09/14/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Lee, Jong Myeon, Lee, Sang Moon, KANG, Hyoung Dong, Jung, Hyun Chui
• Application Number:
  US12/178,460
• Publication Number:
  US 20080293321A1
• Time in Patent Office: Days
• US Class Current: 445/50
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: H01J 2201/30469 Carbon nanotubes (CNTs)
• CPC Class Codes: H01J 9/025 of field emission cathodes

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.

Claims

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 μ

m.

3. The process as set forth in claim 1, wherein the applied conductive polymer layer has a thickness of about 0.2 to 1 μ

m.

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 (MgCl₂), 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)