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Field emission component, and preparation method

一种场发射、元件的技术，应用在电气元件、冷阴极制造、电极系统制造等方向，能够解决成本高、不利实际应用等问题，达到容易操作、方便应用、易于固定的效果

Active Publication Date: 2007-12-26
TSINGHUA UNIV +1
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Problems solved by technology

Moreover, the substrate material also needs to be able to withstand the high temperature range of carbon nanotube growth, so the cost of this method is high, which is not conducive to practical application

Method used

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  • Field emission component, and preparation method
  • Field emission component, and preparation method

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] Please refer to Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of field emission element 10, and this field emission element 10 comprises a carbon nanotube field emission wire 12 and a coating on the carbon nanotube field emission wire 12 outer surface Support body protective layer 14 . The carbon nanotube field emission wire 12 is used for emitting electrons, and the support protection layer 14 provides mechanical support and protection or conduction to the carbon nanotube field emission wire 12 .

[0026] The carbon nanotube field emission wire 12 may be a carbon nanotube wire drawn from a super-aligned carbon nanotube array, which contains a large number of carbon nanotubes. According to actual needs, the carbon nanotube field emission wire 12 can also be a combination of multiple carbon nanotube wires pulled out from th...

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Abstract

The field emission element includes a wire of field emission layer of Nano carbon tube, and protective layer of support body for covering external surface of field emission wire of Nano carbon tube. The invention also relates to method for preparing field emission element. The method includes following steps: providing a field emission wire of Nano carbon tube; forming a protective layer of support body on external surface of wire of Nano carbon tube; cutting out the field emission wire of Nano carbon tube according to prearranged length; carrying out surface treatment for the cut out wire so as to form field emission elements.

Description

technical field [0001] The invention relates to a field emission element and a preparation method thereof, in particular to a carbon nanotube field emission element and a preparation method thereof. Background technique [0002] Carbon Nanotube (CNT) is a new type of carbon material, which was discovered by Japanese researcher Iijima in 1991, please refer to "Helical Microtubules of Graphitic Carbon", S.Iijima, Nature, vol.354, p56 (1991) . Carbon nanotubes have excellent electrical conductivity, good chemical stability and large aspect ratio, and they have a tip surface area that is almost close to the theoretical limit (the smaller the tip surface area, the more concentrated its local electric field), so carbon nanotubes in the field The launch field has potential application prospects. Current studies have shown that carbon nanotubes are one of the best known field emission materials. Its tip size is only a few nanometers to tens of nanometers, has an extremely low fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/304H01J29/04C01B31/00C01B31/02H01J9/02B82B1/00B82B3/00
CPCH01J9/025B82Y10/00H01J1/304H01J2201/30469
Inventor 刘亮姜开利范守善陈清龙李锡福陈杰良
Owner TSINGHUA UNIV
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