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Patent for Sale:

Beta-Silicon Carbide Nanorods Synthesis    

Technique to grow beta-silicon carbide nanorods and to prepare patterned field-emitters by chemical vapor deposition (CVD).


The technology relates to synthesis of beta-silicon carbide nanorods on a substrate by CVD using solid carbon/silicon as sources, hydrogen as reactant gas and metal powder as catalyst. A patterned field-emitter array could be formed by removing the selected area on the substrate using chemical etching.

The invention allows growing nanorods with simple one-step method using non-toxic hydrogen gas.

Primary Application of the Technology

The technique could be applied for fabricating flat panel display and reinforcing phase for composites.

Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 117: Single-Crystal, Oriented-Crystal, And Epitaxy Growth Processes; Non-Coating Apparatus Therefor

Processes consisting of the single or repeated unit operation of forming a single-crystal of any type of material, including inorganic or organic; such processes combined with perfecting operations; and apparatus for conducting non-coating processes of this class.

Subclass 87: Forming a platelet shape or a small diameter, elongate, generally cylindrical shape (e.g., whisker, fiber, needle, filament)

Class 423: Chemistry Of Inorganic Compounds

This class provides for what is generally termed the field of inorganic chemistry. It includes inorganic compounds, nonmetallic elements and processes of producing the same involving a chemical reaction. The products are generally in a relatively pure state but may be a mixture with no other utility than as a source material for an inorganic compound or element. This includes metal compound products useful in metallurgical processes of obtaining free metals.

Subclass 345: Of carbon (i.e., silicon carbide)

Class 427: Coating Processes

This is the generic class for: A. applying or obtaining a coating on a surface. The coating may be hard or soft, permanent or transitory, supplied solely by extraneous materials or supplied wholly or in part by the base material. B. impregnating a base by causing a coating material to extend or penetrate into the base material, or into the interstices of a porous, cellular or foraminous material. C. taking preparatory treatments of the base material, subsequent treatments of the coated base material and other ancillary noncoating operations claimed, per se, processes limited to etching for making a base more compatible with, or adherent to, the coating wherein the base is the substrate (work) onto which a coating is applied are included.

Subclass 589: Silicon carbide

Class 977: Nanotechnology

This art collection provides for disclosures related to: nanostructure and chemical compositions of nanostructure; device that include at least one nanostructure; mathematical algorithms, e.g., computer software, etc., specifically adapted for modeling configurations or properties of nanostructure; methods or apparatus for making, detecting, analyzing, or treating nanostructure; and specified particular uses of nanostructure. the term "nanostructure" is defined to mean an atomic, molecular, or macromolecular structure that: has at least one physical dimension of approximately 1-100 nanometers; and possesses a special property, provides a special function, or produces a special effect that is uniquely attributable to the structure s nanoscale physical size.

Subclass 762: Nanowire or quantum wire (axially elongated structure having two dimensions of 100 nm or less)
Subclass 775: Nanosized powder or flake (e.g., nanosized catalyst, etc.)
Subclass 777: Metallic powder or flake
Subclass 843: Gas phase catalytic growth (i.e., chemical vapor deposition)
Subclass 890: Deposition of materials (e.g., coating, CVD, or ALD, etc.)