CN103545011A - Electromagnetic wave penetrable conducting layer and electronic device - Google Patents
Electromagnetic wave penetrable conducting layer and electronic device Download PDFInfo
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- CN103545011A CN103545011A CN201210235318.9A CN201210235318A CN103545011A CN 103545011 A CN103545011 A CN 103545011A CN 201210235318 A CN201210235318 A CN 201210235318A CN 103545011 A CN103545011 A CN 103545011A
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Abstract
The invention relates to an electromagnetic wave penetrable conducting layer. The conducting layer is a porous carbon nano tube layer, the porous carbon nano tube layer comprises a plurality of carbon nano tubes, the carbon nano tubes are closely connected to one another by Van der Waals' force, and the penetration rate of electromagnetic wave with the frequency of 600KHz-2000MHz on the porous carbon nano tube layer can reach 80%. The invention also relates to an electronic device using the electromagnetic wave penetrable conducting layer.
Description
Technical field
The present invention relates to a kind of penetrable electromagnetic wave type conductive layer and electronic installation.
Background technology
Conductive layer of the prior art is generally a continuous ITO layer (tin indium oxide), yet this continuous ITO layer has good shielding action to electromagnetic wave, makes this electromagnetic wave can not penetrate this conductive layer, so limited the further application of this conductive layer.
Summary of the invention
In view of this, necessary a kind of penetrable electromagnetic wave type conductive layer and the electronic installation of providing.
A kind of penetrable electromagnetic wave type conductive layer, wherein, described conductive layer is the carbon nanotube layer of a porous, the carbon nanotube layer of described porous comprises a plurality of carbon nano-tube, between described a plurality of carbon nano-tube, by Van der Waals force, be closely connected, the carbon nanotube layer of described porous reaches 80% to the electromagnetic transmitance of 600KHz-2000 MHz.
A kind of electronic installation, comprise that an electromagnetic wave element and a conductive layer are near described electromagnetic wave element setting, described electromagnetic wave element for generation of or receive electromagnetic wave signal, wherein, described conductive layer is the carbon nanotube layer of a porous, and the carbon nanotube layer of wherein said porous reaches 80% to the electromagnetic transmitance of 600KHz-2000 MHz.
Penetrable electromagnetic wave type conductive layer provided by the invention, because described conductive layer is the carbon nanotube layer of a porous, therefore this conductive layer has higher transmitance to described electromagnetic wave, therefore, the penetrable electromagnetic wave of this conductive layer.In addition, because electromagnetic wave signal can penetrate described conductive layer, therefore the electromagnetic wave element in this electronic installation and conductive layer can be brought into play effect separately, and can not produce phase mutual interference.
Accompanying drawing explanation
The structural representation of the electronic installation that Fig. 1 provides for the embodiment of the present invention.
The stereoscan photograph of the carbon nano-tube membrane that the conductive layer in the electronic installation that Fig. 2 provides for the embodiment of the present invention is used.
The stereoscan photograph of the carbon nano-tube laminate that the conductive layer in the electronic installation that Fig. 3 provides for the embodiment of the present invention is used.
The stereoscan photograph of the carbon nano-tube waddingization film that the conductive layer in the electronic installation that Fig. 4 provides for the embodiment of the present invention is used.
Main element symbol description
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10 |
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20 |
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30 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, the embodiment of the present invention provides a kind of electronic installation, and it comprises an electromagnetic wave element 10 and a conductive layer 20.Described electromagnetic wave element 10 is oppositely arranged with described conductive layer 20.Described electromagnetic wave element 10 for generation of or receive an electromagnetic wave signal.When described electromagnetic wave element 10 is an electromagnetic wave signal receiver, an electromagnetic wave signal can penetrate described conductive layer 20, thereby is received by described electromagnetic wave signal receiver; When described electromagnetic wave element 10 is an electromagnetic wave signal generator, the electromagnetic wave signal that electromagnetic wave signal generator is launched can penetrate described conductive layer 20.Described conductive layer 20 can or be laid in an insulated substrate surface by the unsettled setting of a support frame.In the present embodiment, described conductive layer 20 is arranged on a support frame 30.Described support frame 30 has a through hole.Described conductive layer 20 can be by the unsettled setting of described throughhole portions.Described electromagnetic wave generator 10 can be over against described through hole setting.The material of described support frame 30 can be metal.The setting of described support frame 30 is appreciated that because described conductive layer 20 is by the unsettled setting of described throughhole portions, therefore can not exert an influence to the electromagnetic wave through characteristic of described conductive layer 20.
Described electronic installation can be proficiency machine, MP5, touch-screen, display, PDA, DPF, GPS navigation equipment, electronic dictionary and other electronic installations.In the present embodiment, described electronic installation is one to have the display of touching function.Described display comprises a LCDs and one and the electromagnetical type touch screen of the stacked setting of described LCDs.Described electromagnetical type touch screen is arranged on described LCDs away from user's surface.Described LCDs comprises at least one conductive layer 20, and this at least one conductive layer 20 can be used as both alignment layers or the polarizing layer of described LCDs.Described electromagnetical type touch screen comprises a plurality of electromagnetic wave elements 10, the electromagnetic wave signal that this electromagnetic wave element 10 sends for receiving the time writer of a touching on described display, thereby can obtain the coordinate information of described time writer touch points on display, and then realize the control to described display.This electromagnetic wave element 10 and conductive layer 20 be appreciated that because electromagnetic wave signal can penetrate described conductive layer 20, therefore can be brought into play effect separately, and can not produce phase mutual interference.
The frequency that described electromagnetic wave element 10 produced or received electromagnetic wave signal can be 600KHz-2000 MHz.Described conductive layer 20 is one to have the transparent conducting structures in a plurality of gaps, and described a plurality of gaps are uniformly distributed in described transparent conducting structures, and the plurality of gap can make the electromagnetic wave of described 600KHz-2000 MHz penetrate.In the present embodiment, this conductive layer 20 is a transparent carbon nanotube layer.
Described transparent carbon nanotube layer comprises at least one carbon nano-tube film, and this carbon nano-tube film can be carbon nano-tube membrane, carbon nano-tube laminate, carbon nano-tube waddingization film.In the present embodiment, this conductive layer 20 is a carbon nano-tube membrane.
Described carbon nano-tube membrane is from a carbon nano pipe array, directly to pull acquisition.In the present embodiment, this conductive layer 20 is a carbon nano-tube membrane.Refer to Fig. 2, the self supporting structure that described carbon nano-tube membrane is comprised of some carbon nano-tube.Described some carbon nano-tube are for being arranged of preferred orient in the same direction, described in be arranged of preferred orient refer to most of carbon nano-tube in carbon nano-tube membrane whole bearing of trend substantially in the same direction.And the whole bearing of trend of described most of carbon nano-tube is basically parallel to the surface of carbon nano-tube membrane.Further, in described carbon nano-tube membrane, most carbon nano-tube are to join end to end by Van der Waals force.In most of carbon nano-tube of extending substantially in the same direction in described carbon nano-tube membrane particularly,, each carbon nano-tube joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend.In most carbon nano-tube of extending of described carbon nano-tube membrane, between carbon nano-tube arranged side by side, there are a plurality of gaps substantially in the same direction.The width in described gap is 10 nanometers to 10 micron; Preferably, the width in described gap is 1 micron to 10 microns; More preferably, the width in described gap is 5 microns to 10 microns.The ratio that the gross area in described a plurality of gaps accounts for described carbon nano-tube membrane surface area can reach more than 80%; Preferably, to account for the ratio of described carbon nano-tube membrane surface area be more than 90% to the gross area in described a plurality of gaps; More preferably, to account for the ratio of described carbon nano-tube membrane surface area be more than 95% to the gross area in described a plurality of gaps.The light transmittance of described carbon nano-tube membrane is relevant with the ratio that the gross area in described a plurality of gaps accounts for described carbon nano-tube membrane surface area, that is, the light transmittance of described carbon nano-tube membrane can reach more than 80%; Preferably, the light transmittance of described carbon nano-tube membrane is more than 90%; More preferably, the light transmittance of described carbon nano-tube membrane is more than 95%.Described carbon nano-tube membrane can reach more than 80% the electromagnetic transmitance of 600KHz-2000 MHz.Particularly, described carbon nano-tube membrane can reach more than 80% to the electromagnetic transmitance of 300MHz-1500MHz; Preferably, this carbon nano-tube membrane is more than 90% to the electromagnetic transmitance of 300MHz-1500MHz; More preferably, this carbon nano-tube membrane is more than 95% to the electromagnetic transmitance of 300MHz-1500MHz.
Certainly, have the carbon nano-tube of minority random alignment in described carbon nano-tube membrane, these carbon nano-tube can not arranged and form obviously impact the overall orientation of most of carbon nano-tube in carbon nano-tube membrane.Described self-supporting is that carbon nano-tube membrane does not need large-area carrier supported, and it is can be on the whole unsettled and keep self membranaceous state as long as relative both sides provide support power, be about to this carbon nano-tube membrane and be placed in (or being fixed on) while keeping at a certain distance away on two supporters that arrange, the carbon nano-tube membrane between two supporters can the membranaceous state of unsettled maintenance self.Described self-supporting mainly continuous joined end to end and is extended the carbon nano-tube of arranging and realize by Van der Waals force by existing in carbon nano-tube membrane.Particularly, most carbon nano-tube of extending substantially in the same direction in described carbon nano-tube membrane, and nisi linearity, bending that can be suitable; Or not completely according to arranging on bearing of trend, can be suitable depart from bearing of trend.Therefore, can not get rid of between carbon nano-tube arranged side by side in most carbon nano-tube of extending substantially in the same direction of carbon nano-tube membrane and may have part contact.
Described transparent carbon nanotube layer can comprise the carbon nano-tube membrane of a plurality of stacked settings.Between two adjacent carbon nano-tube membranes, by Van der Waals force, be closely connected.The bearing of trend of the carbon nano-tube in adjacent two carbon nano-tube membranes forms a crossing angle α, and this crossing angle α is more than or equal to 0 degree and is less than or equal to 90 degree.The transparent carbon nanotube layer being laminated by this carbon nano-tube membrane can significantly not reduce the electromagnetic transmitance of 600KHz-2000 MHz, can also reach more than 80%.
Described carbon nano-tube laminate comprises equally distributed carbon nano-tube, and carbon nano-tube is unordered, in the same direction or different directions be arranged of preferred orient.Refer to Fig. 3, preferably, the surface of this carbon nano-tube laminate is extended and be parallel to the carbon nano-tube in described carbon nano-tube laminate substantially in the same direction.Carbon nano-tube in described carbon nano-tube laminate is mutually overlapping.In described carbon nano-tube laminate, between carbon nano-tube, by Van der Waals force, attract each other, combine closely, make this carbon nano-tube laminate there is good pliability, can become arbitrary shape and not break by bending fold.And owing to attracting each other by Van der Waals force between the carbon nano-tube in carbon nano-tube laminate, combine closely and form a plurality of gaps, making carbon nano-tube laminate is the structure of a self-supporting, can be without substrate support, self-supporting exists.The width in described gap is 10 nanometers to 10 micron.This carbon nano-tube laminate can obtain by rolling a carbon nano pipe array.This carbon nano pipe array is formed on a matrix surface, the surface of the carbon nano-tube in prepared carbon nano-tube laminate and the matrix of this carbon nano pipe array β that has angle, and wherein, β is more than or equal to 0 degree and is less than or equal to 15 degree (0 °≤β≤15 °).Preferably, the surface that is axially basically parallel to this carbon nano-tube laminate of the carbon nano-tube in described carbon nano-tube laminate.Different according to the mode rolling, the carbon nano-tube in this carbon nano-tube laminate has different spread patterns.For example, the carbon nano-tube in described carbon nano-tube laminate can be arranged substantially in the same direction also and can be arranged along several directions.Area and the thickness of this carbon nano-tube laminate are not limit, and can select according to actual needs.The area of this carbon nano-tube laminate and the size of carbon nano pipe array are basic identical.The height of this carbon nano-tube laminate thickness and carbon nano pipe array and the pressure rolling are relevant, can be 1 micron ~ 100 microns.
Refer to Fig. 4, described carbon nano-tube waddingization film comprises the carbon nano-tube of mutual winding, and this length of carbon nanotube can be greater than 10 centimetres.Between described carbon nano-tube, by Van der Waals force, attract each other, be wound around, form network-like structure.Described carbon nano-tube waddingization film isotropism.Carbon nano-tube in described carbon nano-tube waddingization film is for being uniformly distributed, and random arrangement, forms a large amount of microcellular structures.The width of described microcellular structure is 10 nanometers to 10 micron.The length, width and the thickness that are appreciated that described carbon nano-tube waddingization film are not limit, and can select according to actual needs, and thickness can be 1 micron ~ 100 microns.
Because carbon nano-tube has excellent mechanical characteristic, therefore, adopt above-mentioned transparent carbon nanotube layer to make described conductive layer 20, can make described conductive layer 20 there is good toughness and mechanical strength.Further, because described transparent carbon nanotube layer has a plurality of gaps, therefore, the conductive layer 20 being prepared from by this transparent carbon nanotube layer can not form a continuous conductive structure, therefore, this conductive layer 20 can make electromagnetic wave see through, and can not produce shielding action to electromagnetic wave.
Further, described conductive layer 20 can one further comprises the polymeric material of an insulation, and described polymeric material can be compound in the gap in described transparent carbon nanotube layer, thereby forms a compound transparent carbon nanotube layer.On the one hand, the interpolation of this polymeric material can improve the mechanical performance of described conductive layer 20; On the other hand, the described polymeric material being compound in transparent carbon nanotube layer has the characteristic of insulation, therefore, this compound transparent carbon nanotube layer can not form a continuous conductive structure, therefore, the interpolation of this polymeric material can significantly not reduce the electromagnetic transmitance of described transparent carbon nanotube layer to 600KHz-2000 MHz, and this compound transparent carbon nanotube layer can also reach more than 80% the electromagnetic transmitance of 600KHz-2000 MHz.In addition, because described polymeric material is mainly compound in the gap in described transparent carbon nanotube layer, therefore, the interpolation of this polymeric material can appreciable impact yet described in the light transmittance of transparent carbon nanotube layer, the light transmittance of described transparent carbon nanotube layer can also reach more than 80%.
Described polymeric material can solidify glue (UV glue) etc. for polyvinyl alcohol (PVA), Merlon (PC), polyacrylate (NBS), polysulfones (PSF), polystyrene (PS), polyester, polyolefin or ultraviolet light.
Electronic installation provided by the invention has the following advantages: because described conductive layer 20 is the carbon nanotube layer of a porous, therefore, 20 pairs of described electromagnetic waves of this conductive layer have higher transmitance, therefore, this electronic installation in use, described electromagnetic wave element 10 and conductive layer 20 can be brought into play effect separately, and can not produce phase mutual interference.In addition, this conductive layer 20 is a compound polymeric material further, thereby significantly improves the mechanical performance of this conductive layer 20.
In addition, those skilled in the art also can do other and change in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention, within all should being included in the present invention's scope required for protection.
Claims (12)
1. a penetrable electromagnetic wave type conductive layer, it is characterized in that, described conductive layer is the carbon nanotube layer of a porous, the carbon nanotube layer of described porous comprises a plurality of carbon nano-tube, between described a plurality of carbon nano-tube, by Van der Waals force, be closely connected, the carbon nanotube layer of described porous reaches 80% to the electromagnetic transmitance of 600KHz-2000 MHz.
2. penetrable electromagnetic wave type conductive layer as claimed in claim 1, is characterized in that, the carbon nanotube layer of described porous comprises at least one carbon nano-tube film, and described carbon nano-tube film comprises a plurality of carbon nano-tube of extending in the same direction.
3. penetrable electromagnetic wave type conductive layer as claimed in claim 2, is characterized in that, in described most carbon nano-tube of extending in the same direction, between carbon nano-tube arranged side by side, has a plurality of gaps.
4. penetrable electromagnetic wave type conductive layer as claimed in claim 3, is characterized in that, the width in described gap is 10 nanometers to 10 micron.
5. penetrable electromagnetic wave type conductive layer as claimed in claim 3, is characterized in that, the width in described gap is 1 micron to 10 microns.
6. penetrable electromagnetic wave type conductive layer as claimed in claim 3, is characterized in that, the ratio that the gross area in described a plurality of gaps accounts for described carbon nano-tube film surface area reaches more than 80%.
7. penetrable electromagnetic wave type conductive layer as claimed in claim 3, is characterized in that, the ratio that the gross area in described a plurality of gaps accounts for described carbon nano-tube film surface area reaches more than 90%.
8. penetrable electromagnetic wave type conductive layer as claimed in claim 3, is characterized in that, described conductive layer further comprises a polymeric material, and described polymeric material is filled in the gap of described carbon nanotube layer.
9. penetrable electromagnetic wave type conductive layer as claimed in claim 8, is characterized in that, described polymeric material is selected from polyvinyl alcohol, Merlon, polyacrylate, polysulfones, polystyrene, polyester, polyolefin and ultraviolet light and solidifies glue.
10. an electronic installation, comprise an electromagnetic wave element and a conductive layer arranging near described electromagnetic wave element, described electromagnetic wave element for generation of or receive electromagnetic wave signal, it is characterized in that, described conductive layer is the carbon nanotube layer of a porous, and the carbon nanotube layer of wherein said porous reaches 80% to the electromagnetic transmitance of 600KHz-2000 MHz.
11. electronic installations as claimed in claim 10, it is characterized in that, described electronic installation comprises a LCDs and an electromagnetical type touch screen, described electromagnetical type touch screen is arranged on described LCDs away from user's surface, and described conductive layer is arranged in described LCDs, and described electromagnetic wave element is arranged in described electromagnetical type touch screen.
12. electronic installations as claimed in claim 10, it is characterized in that, the carbon nanotube layer of described porous comprises a plurality of carbon nano-tube of extending in the same direction, in described most carbon nano-tube of extending in the same direction, between carbon nano-tube arranged side by side, has a plurality of gaps.
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| CN201210235318.9A CN103545011A (en) | 2012-07-09 | 2012-07-09 | Electromagnetic wave penetrable conducting layer and electronic device |
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Application publication date: 20140129 |