Method for fabrication of patterned carbon nanotube films
Patent 6277318 Issued on August 21, 2001. Estimated Expiration Date: 
August 18, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 18, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesField emission cathode having an electrically conducting material shaped of a narrow rod or knife edge Carbon fiber-based field emission devices Patent #: 5872422 InventorsApplicationNo. 376457 filed on 08/18/1999US Classes:264/346, To anneal or temper264/235, Annealing264/236, Completing vulcanization or polymerization264/298, By casting on a liquid surface264/319, Applying heat or pressure264/345, By a temperature change264/446, Limited to treatment of surface or coated surface428/206Including particulate materialExaminersPrimary: Dixon, MerrickAttorney, Agent or FirmForeign Patent References
International ClassB29B 017/00AbstractA method for fabricating adherent, patterned carbon nanotube films is provided. According to the invention, a substrate is patterned with a carbide-forming material, a carbon-dissolving material, or a low melting point metal. Carbon nanotubes are then deposited onto the patterned substrate, but have relatively poor adhesion to either the substrate material or the patterned material. The substrate is then annealed, typically in vacuum, at a temperature dependent on the particular patterning material, e.g., a temperature at which carbide formation occurs, at which carbon dissolution occurs, or at which the low melting point metal melts. The annealing thereby provides an adherent nanotube film over the patterned areas, while the nanotubes deposited onto the non-patterned areas are easily removed, e.g., by blowing, rubbing, brushing and/or ultrasonication in a solvent such as methanol.Other References
Field of SearchVacuum-type tubeLimited to treatment of surface or coated surface Casting suspension of particles against forming surface Annealing Completing vulcanization or polymerization To anneal or temper By casting on a liquid surface Shaping against forming surface (e.g., casting, die shaping, etc.) Applying heat or pressure Ejecting or stripping before full set or cure of work By a temperature change To cool | |
