Etching a substrate: processes – Etching to produce porous or perforated article
Reexamination Certificate
2001-08-29
2003-07-22
Kunemund, Robert (Department: 1765)
Etching a substrate: processes
Etching to produce porous or perforated article
C216S100000, C423S447300
Reexamination Certificate
active
06596187
ABSTRACT:
FIELD OF THE INVENTION
The present invention generally relates to a nano-supported sponge catalyst on a substrate, and more particularly to a nano-supported sponge catalyst on a substrate for nanotube growth.
BACKGROUND OF THE INVENTION
A nanotube, and more specifically a carbon nanotube, is known to be useful for providing electron emission in a vacuum device, such as a field emission display. The use of a carbon nanotube as an electron emitter has reduced the cost of vacuum devices, including the cost of a field emission display. The reduction in cost of the field emission display has been obtained with the carbon nanotube replacing other electron emitters (e.g., a Spindt tip), which generally have higher fabrication costs as compared to a carbon nanotube based electron emitter.
The manufacturing costs for vacuum devices (e.g., a field emission display) that use a carbon nanotube can be further reduced if the carbon nanotube is grown on the field emission substrate from a catalytic surface using chemical vapor deposition or other film deposition techniques. Nanotube growth can be conducted as a last deposition process preventing the degradation of the electron emitter properties by other device processing techniques or steps (e.g., wet processes). To further reduce costs for vacuum devices, it is also desirable to construct the field emission substrate from materials such as borosilicate glass or sodalime glass. However, borosilicate glass and sodalime glass cannot generally tolerate temperatures above about sixty hundred and fifty degrees Celsius (650° C.). In addition, the tolerance of borosilicate glass and sodalime glass is further reduced if the borosilicate glass or sodalime glass is subjected to temperatures above about sixty hundred and fifty degrees Celsius (650° C.) for an extended period or forces are applied to the borosilicate glass or sodalime glass at such temperatures.
In view of the foregoing, it is desirable to provide a nano-supported sponge catalyst on a field emission substrate for carbon nanotube growth that allows such a carbon nanotube to be grown on the field emission substrate that has a deformation temperature below about six hundred and fifty degrees Celsius (650° C.). Furthermore, additional desirable features will become apparent to one skilled in the art from the drawings, foregoing background of the invention and following detailed description of a preferred exemplary embodiment, and appended claims.
REFERENCES:
patent: 5689319 (1997-11-01), Vink et al.
patent: 6078133 (2000-06-01), Menu et al.
patent: 6100628 (2000-08-01), Coll et al.
patent: 6129901 (2000-10-01), Moskovits et al.
patent: 6270571 (2001-08-01), Iwasaki et al.
patent: 6278231 (2001-08-01), Iwasaki et al.
patent: 6294450 (2001-09-01), Chen et al.
patent: 6297063 (2001-10-01), Brown et al.
patent: 6333016 (2001-12-01), Resasco et al.
patent: 6350488 (2002-02-01), Lee et al.
patent: 6464853 (2002-10-01), Iwasaki et al.
patent: 6465132 (2002-10-01), Jin
patent: 6514113 (2003-02-01), Lee et al.
patent: 1061043 (2000-12-01), None
patent: 1102298 (2001-05-01), None
patent: 1134304 (2001-05-01), None
patent: WO-90/00208 (1990-01-01), None
Coll Bernard F.
Wei Yi
Koch William E.
Mackey Terrence M.
Motorola Inc.
LandOfFree
Method of forming a nano-supported sponge catalyst on a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of forming a nano-supported sponge catalyst on a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a nano-supported sponge catalyst on a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3010055