Alignment of carbon nanotubes

Details Alignment of carbon nanotubes Alignment of carbon nanotubes

2001-09-18

2003-03-11

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C315S169100, C313S34600R, C445S024000

Reexamination Certificate

active

06531828

ABSTRACT:

TECHNICAL FIELD
The present invention relates in general to display systems, and in particular, to field emission displays.
BACKGROUND INFORMATION
Carbon nanotubes have been demonstrated to achieve good electron field emission. However, in the prior art, the carbon nanotubes are deposited on the cathode in disorganized positions.
FIG. 1
illustrates such a cathode
100
with a substrate
101
and an electrode
102
. Illustrated are carbon nanotubes
103
deposited on electrode
102
in such disorganized positions. As a result of the random organization of the carbon nanotube fibers, the efficiency of the electron emission is impacted to be less than possible.
Therefore, there is a need in the art for a method of aligning such carbon nanotubes to improve the efficiency of the electron emission therefrom.
SUMMARY OF THE INVENTION
The present invention addresses the foregoing need by providing a method for aligning carbon nanotubes within a host phase. Once the carbon nanotubes are aligned, the host phase is then subjected to a binding process to make the alignment of the carbon nanotubes permanent. Thereafter, the surfaces of the host phase can be polished resulting in substantially vertically aligned carbon nanotubes within a thin film, which can then be used within a cathode structure to produce a field emission device, including a display.
The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention.


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patent: 6239547 (2001-05-01), Uemura et al.
patent: 6283812 (2001-09-01), Jin et al.

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