Method for fabricating field emission cathode structure
AssigneesHon Hai Precision Industry Co., Ltd., Tsinghua University
InventorsPENG LIU, SHOU-SHAN FAN
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Abstract
A method for fabricating the field emission cathode structure includes following steps. A first carbon nanotube structure is provided. The first carbon nanotube structure is suspended. A voltage is applied to heat the first carbon nanotube structure to form a temperature gradient. A number of second carbon nanotubes are grown on a surface of the first carbon nanotube structure to form a second carbon nanotube structure.
Claims20
A method for fabricating the field emission cathode structure, the method comprising:
- providing a first carbon nanotube structure;
- suspending the first carbon nanotube structure;
- applying a voltage to the first carbon nanotube structure to heat the first carbon nanotube structure to form a temperature gradient;
- and
- growing a plurality of second carbon nanotubes on a surface of the first carbon nanotube structure to form a second carbon nanotube structure.
A method for fabricating the field emission cathode structure, the method comprising:
- providing a substrate with a plurality of supports on a surface of the substrate;
- suspending a first carbon nanotube structure on the surface of the substrate via the plurality of supports, wherein the first carbon nanotube structure comprises a plurality of first carbon nanotubes aligned along the same direction;
- applying a voltage between each adjacent two of the plurality of supports to heat the first carbon nanotube structure between the each adjacent two of the plurality of supports;
- and
- growing a second carbon nanotube structure between each adjacent two supports, wherein the second carbon nanotube structure comprises a plurality of second carbon nanotubes.
A method for fabricating composite carbon nanotube structure, the method comprising:
- providing a carbon nanotube array;
- drawing out a first carbon nanotube structure from the carbon nanotube array, wherein the first carbon nanotube structure comprises a plurality of successively oriented first carbon nanotubes joined end to end;
- suspending the first carbon nanotube structure, wherein the first carbon nanotube structure comprises two opposite ends along an orientation of the first carbon nanotubes;
- and
- growing a second carbon nanotube structure on a surface of the first carbon nanotube structure by applying a voltage between the two opposite ends of the first carbon nanotube structure.
Dependencies are inferred from the claim text.