CN102819336A - Touch screen panel - Google Patents
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- CN102819336A CN102819336A CN2011101540658A CN201110154065A CN102819336A CN 102819336 A CN102819336 A CN 102819336A CN 2011101540658 A CN2011101540658 A CN 2011101540658A CN 201110154065 A CN201110154065 A CN 201110154065A CN 102819336 A CN102819336 A CN 102819336A
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Abstract
The invention relates to a touch screen panel. The touch screen panel is defined into two areas, namely a touch area and a routing area; the touch screen panel comprises an insulated base with a surface, an adhesive layer, a transparent conductive layer, at least one electrode, and a conductive circuit, wherein the adhesive layer is arranged on the surface of the insulated base; the transparent conductive layer comprises a carbon nano tube layer and is fixed on the surface of the insulated base through the adhesive layer; at least one electrode is electrically connected with the transparent conductive layer; the conductive circuit is electrically connected with the at least one electrode; the transparent conductive layer is just arranged on the touch area; the conductive circuit is just arranged on the surface of the adhesive layer in the routing area, and the touch screen panel further comprises a carbon nano tube wire arranged between the conductive circuit and the adhesive layer.
Description
Technical field
The present invention relates to a kind of touch panel, relate in particular to a kind of touch panel based on CNT.
Background technology
In recent years, be accompanied by the high performance and the diversified development of various electronic equipments such as mobile phone and touch navigation system, the electronic equipment that the touch-screen of light transmission is installed in the front of display devices such as liquid crystal progressively increases.The user of such electronic equipment is through touch-screen, on one side the displaying contents of the display device that is positioned at the touch-screen back side is carried out visual confirmation, utilize finger or pointer etc. to push touch-screen on one side and operate.Thus, various functions that can operating electronic equipment.
Different according to the principle of work of touch-screen and transmission medium, existing touch-screen is divided into four types, is respectively resistance-type, condenser type, infrared-type and surface acoustic wave type.Wherein the application of capacitive touch screen and resistive touch screen is more extensive.
Condenser type of the prior art and resistive touch screen generally include at least one indium tin oxide layer as transparency conducting layer (ITO layer).Yet the ITO layer adopts prepared such as ion beam sputtering or vapor deposition usually as transparency conducting layer, in the process of preparation, needs higher vacuum environment and need be heated to 200 ℃ ~ 300 ℃, therefore, makes that the preparation cost of ITO layer is higher.In addition, the ITO layer is after constantly bending, and the resistance of its bending place increases to some extent, and it has machinery and the imperfect shortcoming of chemical durability as transparency conducting layer, and has the phenomenon that resistance is inhomogeneous and the resistance value scope is less.Thereby cause existing touch-screen to have shortcomings such as the low and accuracy of durable, sensitivity is relatively poor.
Summary of the invention
In view of this, necessary the touch panel that a kind of durability is good, accuracy is high and highly sensitive is provided.
A kind of touch panel, this touch panel definition has two zones: a touch area and cabling zone, this touch panel comprises: a dielectric base has a surface; One adhesive-layer, this adhesive-layer are arranged at the said surface of said dielectric base; One transparency conducting layer, this transparency conducting layer comprise a carbon nanotube layer and are fixed in the surface of dielectric base through said adhesive-layer; At least one electrode, this at least one electrode is electrically connected with said transparency conducting layer; And a conducting wire, this conducting wire is connected with said at least one electrode electricity; Wherein, said transparency conducting layer only is arranged at the touch area, and said conducting wire only is arranged at the surface that adhesive-layer is positioned at the cabling zone, and this touch panel comprises that further one is arranged at carbon nano tube line between conducting wire and the adhesive-layer.
A kind of touch panel, this touch panel definition has two zones: a touch area and cabling zone, this touch panel comprises: a dielectric base has a surface; One adhesive-layer, this adhesive-layer are arranged at the said surface of said dielectric base; One transparency conducting layer, this transparency conducting layer comprise a carbon nanotube layer and are fixed in the surface of dielectric base through said adhesive-layer; At least one electrode, this at least one electrode is electrically connected with said transparency conducting layer; And a conducting wire, this conducting wire is connected with said at least one electrode electricity; Wherein, this touch panel comprises that further a carbon nano tube line and conducting wire form composite structure, and this carbon nano tube line is the extension of carbon nanotube layer.
A kind of touch panel, this touch panel definition has two zones: a touch area and cabling zone, this touch panel comprises: a dielectric base has a surface; One adhesive-layer, this adhesive-layer are arranged at the said surface of said dielectric base; One transparency conducting layer, this transparency conducting layer comprise a carbon nanotube layer and are fixed in the surface of dielectric base through said adhesive-layer; At least one electrode, this at least one electrode is electrically connected with said transparency conducting layer; And a conducting wire, this conducting wire is connected with said at least one electrode electricity; Wherein, said conducting wire is a composite structure of carbon nano tube, and the CNT in this composite structure of carbon nano tube partly is coated between the adhesive-layer, and part is coated in the conducting wire.
Compared with prior art; The touch-screen that the embodiment of the invention provides has the following advantages: first; CNT has excellent mechanical characteristic makes carbon nanotube layer have good toughness and physical strength; And anti-bending so adopt carbon nanotube layer as transparency conducting layer, can improve the durability of touch-screen accordingly; And then the durability of the display device of this touch-screen is used in raising; The second, because carbon nanotube layer comprises a plurality of equally distributed CNTs, so this carbon nanotube layer also has uniform resistance and distributes, and therefore, adopts this carbon nanotube layer can improve the sensitivity and the degree of accuracy of touch-screen accordingly as transparency conducting layer; The 3rd because carbon nano tube line and conducting wire form composite structure, so that the enhancing of the electric conductivity of conducting wire.
Description of drawings
The vertical view of the touch panel that Fig. 1 provides for the embodiment of the invention.
Fig. 2 is the sectional view of the touch panel II-II along the line of Fig. 1.
Fig. 3 is the stereoscan photograph of the transparency conducting layer in the touch panel of Fig. 1.
The process chart of the single touch panel of preparation that Fig. 4 provides for the embodiment of the invention.
The process chart of a plurality of touch panels of preparation that Fig. 5 provides for the embodiment of the invention.
Fig. 6 is the vertical view of step 1 of the process chart of Fig. 5.
Fig. 7 is the vertical view of step 3 of the process chart of Fig. 5.
Fig. 8 is the vertical view of step 4 of the process chart of Fig. 5.
Fig. 9 is the vertical view of step 6 of the process chart of Fig. 5.
The main element symbol description
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10 |
| The |
10A |
| The |
10B |
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12 |
| The |
120 |
| The |
122 |
| The touch- |
124 |
| Adhesive- |
13 |
| Transparency conducting |
14 |
| Carbon |
15 |
| Electrode | 16 |
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17 |
| The conducting |
18 |
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19 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
To combine accompanying drawing and specific embodiment below, touch panel provided by the invention and preparation method thereof is done further to specify.
See also Fig. 1 and Fig. 2, the embodiment of the invention provides a kind of touch panel 10, and this touch panel 10 comprises a dielectric base 12, one adhesive-layers 13, one transparency conducting layers 14, at least one electrode 16, and a conducting wire 18.
Said touch panel 10 definition have two zones: a touch area 10A and cabling zone 10B.Said touch area 10A is the zone that said touch panel 10 can be realized touch controllable function by touching, and said cabling zone 10B is the setting area of conducting wire 18 in the said touch panel 10.Said cabling zone 10B is touch panel 10 submarginal zones than small size, and it can be positioned at least one side of touch area 10A.Said touch area 10A is the larger area zone that comprises touch panel 10 central areas.Said cabling zone 10B is usually located at the periphery of said touch area 10A.The position relation of said touch area 10A and cabling zone 10B is not limit, and can select as required.Below provide when said touch panel 10 is rectangle several kinds of positions relations of touch area 10A and cabling zone 10B.In the present embodiment, said touch area 10A is the central area of touch panel 10, and said cabling zone 10B is around touch area 10A.Identical and the area of the shape of the shape of said touch area 10A and touch panel 10 is less than the area of touch panel 10, and said cabling zone 10B is other zone beyond the 10A of touch area.
Said adhesive-layer 13 is arranged at a surface of dielectric base 12.Said transparency conducting layer 14 and conducting wire 18 are arranged at a surface of adhesive-layer 13 respectively.Said electrode 16 is arranged at transparency conducting layer 14 surfaces.Wherein, said transparency conducting layer 14 only is arranged at the surface that dielectric base 12 is positioned at touch area 10A.Said conducting wire 18 only is arranged at the surface that dielectric base 12 is positioned at cabling zone 10B.Said electrode 16 is arranged at said transparency conducting layer 14 at least one sides, and is electrically connected respectively with conducting wire 18 and transparency conducting layer 14.Said conducting wire 18 is electrically connected this transparency conducting layer 14 with an external circuits (figure does not show).Because transparency conducting layer 14 of the present invention only is arranged at the surface that dielectric base 12 is positioned at touch area 10A; And conducting wire 18 only is arranged at the surface that dielectric base 12 is positioned at cabling zone 10B; That is, transparency conducting layer 14 and conducting wire 18 not have the part that overlaps, so when pointer or finger touches arrive the regional 10B of cabling; Can between conducting wire 18 and transparency conducting layer 14, not produce the capacitance interference signal, thus the accuracy that has further improved touch-screen.
Said dielectric base 12 is the structure of a curved face type or plane.This dielectric base 12 has suitable transparency, and mainly plays a part to support.This dielectric base 12 is formed by hard materials such as glass, quartz, adamas or plastics or flexible material.Particularly; Said flexible material may be selected to be polycarbonate (PC), polymethylmethacrylate (PMMA), tygon (PE), polyimide (PI) or polyethylene terephthalate polyester materials such as (PET), or materials such as polyethersulfone (PES), cellulose esters, PVC (PVC), benzocyclobutene (BCB) or acryl resin.In the present embodiment, said dielectric base 12 is the structure of a plane, and this dielectric base 12 is flexible polycarbonate (PC).Be appreciated that the material that forms said dielectric base 12 is not limited to the above-mentioned material of enumerating,, and have suitable transparency and get final product as long as can make dielectric base 12 play the effect of support.
Said transparency conducting layer 14 comprises a carbon nanotube layer.Said carbon nanotube layer is made up of some CNTs, and the bearing of trend of most of CNTs is basically parallel to the surface of this carbon nanotube layer in this carbon nanotube layer.The thickness of said carbon nanotube layer is not limit, and can select as required; The thickness of said carbon nanotube layer is 0.5 nanometer ~ 100 micron; Preferably, the thickness of this carbon nanotube layer is 100 nanometers ~ 200 nanometers.Because the even carbon nanotube in the said carbon nanotube layer distributes and has good flexible, makes this carbon nanotube layer have good flexible, can bending fold become arbitrary shape and be difficult for breaking.In the present embodiment, said transparency conducting layer 14 is merely a carbon nanotube layer.
CNT in the said carbon nanotube layer comprises one or more in SWCN, double-walled carbon nano-tube and the multi-walled carbon nano-tubes.The diameter of said SWCN is 0.5 nanometer ~ 50 nanometers, and the diameter of double-walled carbon nano-tube is 1.0 nanometers ~ 50 nanometers, and the diameter of multi-walled carbon nano-tubes is 1.5 nanometers ~ 50 nanometers.The length of said CNT is greater than 50 microns.Preferably, the length of this CNT is preferably 200 microns ~ 900 microns.
Unordered or the orderly arrangement of CNT in the said carbon nanotube layer.So-called lack of alignment is meant that the orientation of CNT is random.The so-called arrangement in order is meant that the orientation of CNT is regular.Particularly, when carbon nanotube layer comprised the CNT of lack of alignment, CNT twined each other or isotropy is arranged; When carbon nanotube layer comprised orderly carbon nanotubes arranged, CNT was arranged of preferred orient along a direction or a plurality of directions.So-called " preferred orientation " is meant that the most of CNTs in the said carbon nanotube layer have bigger orientation probability on a direction or several direction; That is, the axially basic of the most of CNTs in this carbon nanotube layer extended along same direction or several direction.Have the gap between the adjacent CNT among the said carbon nanotube layer, thereby in carbon nanotube layer, form a plurality of gaps.
Said carbon nanotube layer comprises at least one carbon nano-tube film.When said carbon nanotube layer comprised a plurality of carbon nano-tube film, this carbon nano-tube film can be provided with or range upon range of setting by substantially parallel no gap coplane.See also Fig. 3, the self supporting structure that said carbon nano-tube film is made up of some CNTs.Said some CNTs are arranged of preferred orient along same direction.The whole bearing of trend of most of CNTs basically in the same direction in this carbon nano-tube film.And the whole bearing of trend of said most of CNTs is basically parallel to the surface of carbon nano-tube film.Further, most CNTs are to join end to end through Van der Waals (Van Der Waals) power in the said carbon nano-tube film.Particularly, each CNT joins end to end through Van der Waals force with adjacent CNT on bearing of trend in the most of CNTs that extend basically in the same direction in the said carbon nano-tube film.Certainly, have the CNT of minority random alignment in the said carbon nano-tube film, these CNTs can not arranged the overall orientation of most of CNTs in the carbon nano-tube film and constitute obviously influence.Said carbon nano-tube film does not need large-area supported; And as long as the relative both sides power of providing support can be unsettled on the whole and keep self membranaceous state; When being about to this carbon nano-tube film and placing on two supporters that (or being fixed in) be provided with at interval, the carbon nano-tube film between two supporters can the membranaceous state of unsettled maintenance self.
Particularly, the most CNTs that extend basically in the same direction in the said carbon nano-tube film, and nisi linearity, bending that can be suitable; Perhaps be not fully according to arranging on the bearing of trend, can be suitable depart from bearing of trend.Therefore, can not get rid of between the CNT arranged side by side in the most CNTs that extend basically in the same direction of carbon nano-tube film and possibly have the part contact.
Particularly, said carbon nano-tube film comprise a plurality of continuously and the CNT fragment that aligns.These a plurality of CNT fragments join end to end through Van der Waals force.Each CNT fragment comprises a plurality of CNTs that are parallel to each other, and these a plurality of CNTs that are parallel to each other are combined closely through Van der Waals force.This CNT fragment has length, thickness, homogeneity and shape arbitrarily.CNT in this carbon nano-tube film is arranged of preferred orient along same direction.
Said carbon nano-tube film can be through directly pulling acquisition from carbon nano pipe array.Be appreciated that through a plurality of carbon nano-tube films are parallel and do not have that the gap coplane is laid or/and range upon range of laying, can prepare the carbon nanotube layer of different area and thickness.The thickness of each carbon nano-tube film can be 0.5 nanometer ~ 100 micron.When carbon nanotube layer comprised the carbon nano-tube film of a plurality of range upon range of settings, the orientation of the CNT in the adjacent carbon nano-tube film formed an angle, 0≤α≤90.
Said carbon nano-tube film can be through directly pulling acquisition from carbon nano pipe array.Particularly, at first on the substrate of quartz or wafer or other material, grow carbon nano pipe array, for example use chemical gaseous phase Shen to amass (Chemical Vapor Deposition, CVD) method; Then, with stretching technique CNT is pulled out from carbon nano pipe array one by one and formed.These CNTs are able to by Van der Waals force join end to end, and form the conductive elongate structure that tool certain orientation property and almost parallel are arranged.Formed carbon nano-tube film can be in the minimum electrical impedance of the direction tool that stretches, and perpendicular to the maximum electrical impedance of draw direction tool, thereby possess electrical impedance anisotropy.
Said adhesive-layer 13 is transparent.The effect of said adhesive-layer 13 is in order to make said carbon nanotube layer adhere to the surface of said dielectric base 12 better.Said carbon nanotube layer is fixed in dielectric base 12 surfaces through said adhesive-layer 13, and partly is embedded in the said adhesive-layer 13, and part is exposed to outside the adhesive-layer 13.In the present embodiment, the most of CNT part surfaces in the said carbon nanotube layer are embedded in the adhesive-layer 13, and part surface is exposed to outside the adhesive-layer 13.Said adhesive-layer 13 is transparent, and the material of this adhesive-layer 13 is for having low-melting thermoplastic or UV (Ultraviolet Rays) glue, like PVC or PMMA etc.The thickness of said adhesive-layer 13 is 1 nanometer ~ 500 micron; Preferably, the thickness of said adhesive-layer 13 is 1 micron ~ 2 microns.In the present embodiment, the material of said adhesive-layer 13 is a UV glue, and the thickness of this adhesive-layer 13 is about 1.5 microns.
Said electrode 16 is arranged at said transparency conducting layer 14 surfaces, and is positioned at least one side of transparency conducting layer 14.Said electrode 16 that the position is set is relevant with the touch point detection method with the touch-control principle of the touch-screen that adopts this touch panel 10; The number of said electrode 16 is relevant with touch-control resolution with the area of this touch panel 10, can select according to the practical application situation.When the area of touch panel 10 is big more, when resolution requirement was high more, the number of said electrode 16 was many more.Vice versa.In the present embodiment, said touch panel 10 comprises six electrodes 16, and these six electrodes 16 are arranged at intervals at transparency conducting layer 14 1 sides.Said electrode 16 is arranged at the CNT laminar surface so that the part carbon nanotube layer is covered.Said electrode 16 forms composite structure with the carbon nanotube layer that covers.The material of said electrode 16 is other conductive materials such as metal, electrocondution slurry or ITO, can conduct electricity as long as guarantee this electrode 16.Said electrode 16 can pass through the etching conductive film, like metallic film or indium tin oxide films preparation, and also can be through the silk screen print method preparation.
Said conducting wire 18 comprises a plurality of leads, and its material can be other conductive materials such as metal, electrocondution slurry or ITO.The etching conductive film can be passed through in said conducting wire 18, like metallic film or indium tin oxide films preparation, and also can be through the silk screen print method preparation.In the present embodiment, said electrode 16 is electrocondution slurry with conducting wire 18, and said electrode 16 is integrally formed through the serigraphy electrocondution slurry with conducting wire 18.The composition of this electrocondution slurry comprises metal powder, glass powder with low melting point and cementing agent.Wherein, this metal powder is preferably silver powder, and this cementing agent is preferably terpinol or ethyl cellulose.In this electrocondution slurry, the weight ratio of metal powder is 50% ~ 90%, and the weight ratio of glass powder with low melting point is 2% ~ 10%, and the weight ratio of cementing agent is 8% ~ 40%.
Further, said touch panel 10 comprises a plurality of carbon nano tube lines 15.Said carbon nano tube line 15 is arranged between conducting wire 18 and the adhesive-layer 13.Said carbon nano tube line 15 comprises a plurality of CNTs, and its structure is identical with the structure of above-mentioned carbon nanotube layer as transparency conducting layer 14.It is narrower that carbon nano tube line 15 is width here, the carbon nanotube layer that length-diameter ratio is bigger.Said carbon nano tube line 15 is structure as a whole with carbon nanotube layer as transparency conducting layer 14, and promptly carbon nano tube line 15 is the extension as the carbon nanotube layer of transparency conducting layer 14.CNT in the said carbon nano tube line 15 partly is coated between the adhesive-layer 13, and part is coated in the conducting wire 18, to form composite structure with conducting wire 18.This structure make conducting wire 18 and dielectric base 12 combine more firm.And, because the good electric conductivity of CNT makes the electric conductivity of conducting wire 18 strengthen.Because said carbon nano tube line 15 is structure as a whole with carbon nanotube layer as transparency conducting layer 14, thereby improved electrical contact the between conducting wire 18 and the transparency conducting layer 14.Please further referring to structure and the position relation of understanding said transparency conducting layer 14, electrode 16 and conducting wire 18 once about the preparation method of touch panel 10.
The touch-screen that the embodiment of the invention provides has the following advantages: first; CNT has excellent mechanical characteristic makes carbon nanotube layer have good toughness and physical strength; And anti-bending so adopt carbon nanotube layer as transparency conducting layer, can improve the durability of touch-screen accordingly; And then the durability of the display device of this touch-screen is used in raising; The second, because carbon nanotube layer comprises a plurality of equally distributed CNTs, so this carbon nanotube layer also has uniform resistance and distributes, and therefore, adopts this carbon nanotube layer can improve the sensitivity and the degree of accuracy of touch-screen accordingly as transparency conducting layer; The 3rd; Because carbon nanotube layer only is arranged at the surface that dielectric base is positioned at the touch area, and the conducting wire only is arranged at the surface that dielectric base is positioned at the cabling zone, promptly; Carbon nanotube layer and conducting wire do not have the part of overlapping; So, can between conducting wire and carbon nanotube layer, not produce the capacitance interference signal, thereby accuracy that has improved touch-screen when pointer or finger touches during to the cabling zone; The 4th because carbon nano tube line and conducting wire form composite structure, so that the enhancing of the electric conductivity of conducting wire; The 5th and since said carbon nano tube line be structure as a whole as the carbon nanotube layer of transparency conducting layer, thereby improved electrical contact the between conducting wire and the transparency conducting layer.
See also Fig. 4, the embodiment of the invention further provides a kind of method that once prepares single touch panel 10, and it may further comprise the steps:
Step 1 provides a dielectric base 12, and a touch area 10A and cabling zone 10B are set in a surface of this dielectric base 12.
In the present embodiment, said dielectric base 12 is a PET film.
The method of said formation one adhesive-layer 13 can be spin-coating method, spraying process, brushing etc.In the present embodiment, said adhesive-layer 13 is that a thickness is about 1.5 microns UV glue-line, and it is formed at the whole surface of PET film through the method that applies, like spin-coating method, spraying process or spread coating.
Said carbon nanotube layer can be formed at adhesive-layer 13 surfaces through methods such as printing, deposition or direct layings.In the present embodiment, said carbon nanotube layer 19 is one to have the carbon nano-tube film of self-supporting effect, and it can directly be layed in whole adhesive-layer 13 surfaces.Carbon nanotube layer 19 can partly soak in the adhesive-layer 13 after carbon nanotube layer 19 is formed at adhesive-layer 13 surfaces, and combines with adhesive-layer 13 through cohesive force.Preferably, the CNT in the said carbon nanotube layer 19 partly soaks in the adhesive-layer 13, and part is exposed to outside the adhesive-layer 13.
The method of said curing adhesive-layer 13 is relevant with adhesive-layer 13 materials, need select according to the material of adhesive-layer 13.Because carbon nanotube layer 19 soaks in the adhesive-layer 13, so carbon nanotube layer 19 can be fixed in the process that adhesive-layer 13 solidifies in this step.In the present embodiment, the method through UV-irradiation makes the UV adhesive curing.The time of said UV-irradiation is 2 seconds ~ 30 seconds.In the present embodiment, the time of said UV-irradiation is 4 seconds.
Step 4 forms electrode 16 and conducting wire 18 on said carbon nanotube layer 19 surfaces.
Said electrode 16 can pass through method preparations such as silk screen print method, chemical vapor deposition, magnetron sputtering with conducting wire 18.Said electrode 16 is formed at the surface that carbon nanotube layer 19 is positioned at touch area 10A, and conducting wire 18 is formed at the surface that carbon nanotube layer 19 is positioned at cabling zone 10B.In this step, said electrode 16 and conducting wire 18 cover part carbon nanotube layers 19, and form composite structures with carbon nanotube layer 19 that this part covers.Owing to have the gap between the CNT of carbon nanotube layer 19,, and combine with CNT so the material of electrode 16 and conducting wire 18 can be penetrated in the gap of carbon nanotube layer 19.In the present embodiment, said electrode 16 is integrally formed through the serigraphy electrocondution slurry with conducting wire 18.Before this electrocondution slurry oven dry, can form composite structure with the part carbon nanotube layer that covers 19 mutual infiltrations, and in drying course, this part carbon nanotube layer 19 is coated and fixed.
Step 5 is removed the carbon nanotube layer 19 that is positioned at the 10B exposure of cabling zone.
Said removal be positioned at that cabling zone 10B exposes the method for carbon nanotube layer 19 can be laser ablation, particle beams etching or beamwriter lithography etc.Said conducting wire 18 can be used as remove be positioned at that cabling zone 10B exposes carbon nanotube layer 19 time required contraposition mask.
In the present embodiment,, be positioned at the carbon nanotube layer 19 that cabling zone 10B exposes with removal through computer control laser 17 mobile routes, thus keep remove be positioned at touch area 10A carbon nanotube layer 19 as transparency conducting layer 14.Simultaneously, thus be positioned at cabling zone 10B and also be retained and form carbon nano tube line 15 by the part carbon nanotube layer 19 that conducting wire 18 covers.This carbon nano tube line 15 forms composite structure with conducting wire 18.
Required contraposition mask (mark) when the conducting wire 18 that is appreciated that said serigraphy can be used as laser 17 etchings.Because the part carbon nanotube layer 19 of cabling zone 10B is covered by conducting wire 18, so this part carbon nanotube layer 19 is retained.This processing procedure is called " self alignment ", can simplify preparation technology.If select first laser 17 etchings, form the processing procedure of conducting wire 18 again, then laser 17 etchings and serigraphy conducting wire 18 respectively need a contraposition mask.The tolerance of being made owing to two different contraposition masks is bigger, so increased preparation technology's difficulty.Further, first laser 17 etchings form adhesive-layer 13 planarizations that need make earlier in the processing procedure of conducting wire 18 after laser 17 etchings again, then could serigraphy conducting wire 18.And the processing procedure of present embodiment has avoided making the step of its planarization, both can simplify preparation technology, can reduce preparation cost again.
Be appreciated that; Surface through at the touch panel 10 of present embodiment preparation is provided with an optical clear glue-line (OCA Layer) and a cover plate (Cover Lens), can obtain a touch-screen thereby cover above-mentioned transparency conducting layer 14, electrode 16 and conducting wire 18.Touch panel 10 provided by the invention also can be used for the touch-screen of various employing structure of transparent conductive layer such as condenser type single-point touches screen, condenser type multi-point touch panel, resistance-type single-point touches screen, resistance-type multi-point touch panel.
See also Fig. 5, the embodiment of the invention further provides a kind of method that once prepares a plurality of touch panels 10, and it may further comprise the steps:
Step 1 provides a dielectric base 12, and a surface of this dielectric base 12 comprises a plurality of target areas 120, and a touch-control target area 124 and a cabling target area 122 are set in each target area 120.
Please further consult Fig. 6, the shape of said a plurality of target areas 120 and size can be selected according to actual needs.Said touch-control target area 124 for said dielectric base 12 surfaces with the corresponding zone of touch area 10A of the touch panel 10 that will prepare.The corresponding zone of the regional 10B of cabling of the touch panel 10 that said cabling target area 122 will prepare for said dielectric base 12 surfaces and institute.In the present embodiment, said dielectric base 12 is the structure of a plane, and this dielectric base 12 is flexible material PET.Present embodiment is divided into dielectric base 12 the identical target area 120 of 9 parts of sizes of 3 row, 3 row.Said touch-control target area 124 is the central area of target area 120, and said cabling target area 122 is around touch-control target area 124.The shape of said touch-control target area 124 and area identical with the shape of target area 120 is less than the area of target area 120, and said cabling target area 122 is other zone beyond the touch-control target area 124.
Said adhesive-layer 13 is transparent.The method of said formation one adhesive-layer 13 can be spin-coating method, spraying process, brushing etc.In the present embodiment, said adhesive-layer 13 is that a thickness is about 1.5 microns UV glue-line, and it is formed at PET film one surface through the method that applies.
In the present embodiment, said carbon nanotube layer 19 is one to have the carbon nano-tube film of self-supporting effect, and it can directly be layed in whole adhesive-layer 13 surfaces.Be appreciated that owing to, once prepare a plurality of touch panels, so the width of the single carbon nano-tube film of from carbon nano pipe array, pulling out maybe be less than the width of adhesive-layer 13 through big plate processing procedure.Therefore, also can the parallel no gap of a plurality of carbon nano-tube films be provided with to be combined into a carbon nanotube layer 19 that area is bigger.Preferably, the splicing line of adjacent two carbon nano-tube films is overlapped with the middle cut line of adjacent two row or two row target areas 120.
The method of said curing adhesive-layer 13 is relevant with adhesive-layer 13 materials, need select according to the material of adhesive-layer 13.Because carbon nanotube layer 19 soaks in the adhesive-layer 13, so carbon nanotube layer 19 can be fixed in the process that adhesive-layer 13 solidifies in this step.In the present embodiment, the method through UV-irradiation makes the UV adhesive curing.The time of said UV-irradiation is 4 seconds.
Step 4, carbon nanotube layer 19 surfaces in each target area 120 form electrode 16 and conducting wire 18.
Said electrode 16 can pass through method preparations such as silk screen print method, chemical vapor deposition, magnetron sputtering with conducting wire 18.See also Fig. 8, said electrode 16 is formed at the surface that carbon nanotube layer 19 is positioned at touch-control target area 124, and conducting wire 18 is formed at the surface that carbon nanotube layer 19 is positioned at cabling target area 122.
In this step, said electrode 16 and conducting wire 18 cover part carbon nanotube layers 19, and form composite structures with carbon nanotube layer 19 that this part covers.Owing to have the gap between the CNT of carbon nanotube layer 19,, and combine with CNT so the material of electrode 16 and conducting wire 18 can be penetrated in the gap of carbon nanotube layer 19.In the present embodiment, said electrode 16 is integrally formed through the serigraphy electrocondution slurry with conducting wire 18.Before this electrocondution slurry oven dry, can form composite structure with the part carbon nanotube layer that covers 19 mutual infiltrations.
Step 5 is removed the carbon nanotube layer 19 that is positioned at 122 exposures of cabling target area.
In the present embodiment,, be positioned at the carbon nanotube layer 19 that cabling target area 122 exposes with removal through computer control laser 17 mobile routes, thus keep remove be positioned at touch-control target area 124 carbon nanotube layer 19 as transparency conducting layer 14.Simultaneously, be positioned at cabling target area 122 and also be retained by the part carbon nanotube layer 19 that conducting wire 18 covers and form carbon nano tube line 15.This carbon nano tube line 15 forms composite structure with conducting wire 18.
Step 6, cutting obtains a plurality of touch panels 10.
Said cutting obtains the step of a plurality of touch panels 10 can pass through methods realizations such as cut, machine cuts.In the present embodiment, through machine cuts each target area 120 of dielectric base 12 is separated, thereby obtain a plurality of touch panels 10.Particularly; Cut said dielectric base 12 along the middle cut line of two row or two row target areas 120 perpendicular to dielectric base 12 thickness directions earlier; 120 middle lines of cut cut said dielectric base 12 perpendicular to dielectric base 12 thickness directions along two adjacent target areas again, so can obtain a plurality of touch panels 10.
Be appreciated that; Said cutting obtains before the step of a plurality of touch panels 10 an optical clear glue-line (OCA Layer) and a cover plate (Cover Lens) being set on the surface of dielectric base 12, to cover all transparency conducting layers 14, electrode 16 and conducting wire 18.Then, can obtain a plurality of touch-screens through cutting.
Be appreciated that touch panel 10 provided by the invention goes for the touch-screen of various employing structure of transparent conductive layer such as condenser type single-point touches screen, condenser type multi-point touch panel, resistance-type single-point touches screen, resistance-type multi-point touch panel.
The touch-screen that the embodiment of the invention provides has the following advantages: the first, because carbon nanotube layer is simpler than the preparation technology of ITO layer, thereby reduced preparation cost.The second owing to earlier form electrode and conducting wire, remove again and be positioned at the carbon nanotube layer that the cabling zone exposes at the CNT laminar surface, so electrode be retained with the part carbon nanotube layer that the conducting wire covers, and with electrode and conducting wire formation composite structure.The 3rd, adopt laser ablation to remove and be positioned at the carbon nanotube layer that the cabling zone exposes, required contraposition mask when the conducting wire can be used as laser ablation, thus simplified preparation technology.The 4th, through big plate processing procedure, once prepare a plurality of touch panels, simplified technological process, improved preparation efficiency, reduced preparation cost.
In addition, those skilled in the art can also do other and change in spirit of the present invention, and these all should be included in the present invention's scope required for protection according to the variation that the present invention's spirit is done.
Claims (12)
1. touch panel, this touch panel definition has two zones: a touch area is regional with a cabling, and this touch panel comprises:
One dielectric base has a surface;
One adhesive-layer, this adhesive-layer are arranged at the said surface of said dielectric base;
One transparency conducting layer, this transparency conducting layer comprise a carbon nanotube layer and are fixed in the surface of dielectric base through said adhesive-layer;
At least one electrode, this at least one electrode is electrically connected with said transparency conducting layer; And
One conducting wire, this conducting wire is connected with said at least one electrode electricity;
It is characterized in that said transparency conducting layer only is arranged at the touch area, said conducting wire only is arranged at the surface that adhesive-layer is positioned at the cabling zone, and this touch panel comprises that further one is arranged at carbon nano tube line between conducting wire and the adhesive-layer.
2. touch panel as claimed in claim 1 is characterized in that said carbon nano tube line and carbon nanotube layer are structure as a whole; Carbon nano tube line is the extension of carbon nanotube layer.
3. touch panel as claimed in claim 1 is characterized in that, said carbon nano tube line comprises that a plurality of CNTs extend along a fixed-direction preferred orientation.
4. touch panel as claimed in claim 3 is characterized in that, the CNT in the said carbon nano tube line partly is coated between the adhesive-layer, and part is coated in the conducting wire.
5. touch panel as claimed in claim 3 is characterized in that, said carbon nano tube line and conducting wire form composite structure.
6. touch panel as claimed in claim 1 is characterized in that said carbon nanotube layer is made up of some CNTs, and these some CNTs extend along a fixed-direction preferred orientation.
7. touch panel as claimed in claim 6 is characterized in that, the most of CNT part surfaces in the said carbon nanotube layer are embedded in the adhesive-layer, and part surface is exposed to outside the adhesive-layer.
8. touch panel as claimed in claim 1 is characterized in that, said at least one electrode is arranged at the CNT laminar surface so that the part carbon nanotube layer is covered, and the carbon nanotube layer of this at least one electrode and covering formation composite structure.
9. touch panel as claimed in claim 1 is characterized in that, the material of said at least one electrode and conducting wire is metal, electrocondution slurry or ITO.
10. touch panel as claimed in claim 1 is characterized in that, the material of said adhesive-layer is thermoplastic or UV glue.
11. a touch panel, this touch panel definition has two zones: a touch area and cabling zone, and this touch panel comprises:
One dielectric base has a surface;
One adhesive-layer, this adhesive-layer are arranged at the said surface of said dielectric base;
One transparency conducting layer, this transparency conducting layer comprise a carbon nanotube layer and are fixed in the surface of dielectric base through said adhesive-layer;
At least one electrode, this at least one electrode is electrically connected with said transparency conducting layer; And
One conducting wire, this conducting wire is connected with said at least one electrode electricity;
It is characterized in that this touch panel comprises that further a carbon nano tube line and conducting wire form composite structure, and this carbon nano tube line is the extension of carbon nanotube layer.
12. a touch panel, this touch panel definition has two zones: a touch area and cabling zone, and this touch panel comprises:
One dielectric base has a surface;
One adhesive-layer, this adhesive-layer are arranged at the said surface of said dielectric base;
One transparency conducting layer, this transparency conducting layer comprise a carbon nanotube layer and are fixed in the surface of dielectric base through said adhesive-layer;
At least one electrode, this at least one electrode is electrically connected with said transparency conducting layer; And
One conducting wire, this conducting wire is connected with said at least one electrode electricity;
It is characterized in that said conducting wire is a composite structure of carbon nano tube, and the CNT in this composite structure of carbon nano tube is coated on partly between the adhesive-layer, part is coated in the conducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101540658A CN102819336A (en) | 2011-06-09 | 2011-06-09 | Touch screen panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101540658A CN102819336A (en) | 2011-06-09 | 2011-06-09 | Touch screen panel |
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| CN102819336A true CN102819336A (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101540658A Pending CN102819336A (en) | 2011-06-09 | 2011-06-09 | Touch screen panel |
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| CN108089778A (en) * | 2013-09-02 | 2018-05-29 | 安溪钟泰专利技术转移有限公司 | A kind of touch-screen |
| CN108845707A (en) * | 2018-06-30 | 2018-11-20 | 云谷（固安）科技有限公司 | Touch panel and preparation method thereof |
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