CN103995619A - Frame-free induction sheet of touch screen and manufacturing method thereof - Google Patents
Frame-free induction sheet of touch screen and manufacturing method thereof Download PDFInfo
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- CN103995619A CN103995619A CN201410262106.9A CN201410262106A CN103995619A CN 103995619 A CN103995619 A CN 103995619A CN 201410262106 A CN201410262106 A CN 201410262106A CN 103995619 A CN103995619 A CN 103995619A
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Abstract
The invention discloses a frame-free induction sheet of a touch screen. The frame-free induction sheet of the touch screen comprises a touch screen conductive area and conductive electrodes connected with the touch screen conductive area. The conductive electrodes are arranged along the frames on the two sides of the touch screen conductive area and extend to one end of the touch screen conductive area, and the conductive electrodes are graphene electrode wires. A manufacturing method of the frame-free induction sheet of the touch screen comprises the steps that firstly, a graphene film is manufactured; secondly, the graphene film is transferred to a substrate, laser etching/chemical corrosion/ion etching are conducted on the substrate, so that the substrate is patterned, and then the full-graphene frame-free induction sheet of the touch screen is obtained. The frame-free induction sheet of the touch screen and the manufacturing method of frame-free induction sheet of the touch screen have the advantages that fewer raw materials are consumed, graphene is directly used as a conductive electrode on the substrate with transferred graphene, and therefore manufacturing cost can be reduced; the production processes are simplified, and the yield of the products is increased; the finished induction sheet of the touch screen is free of a frame, capable of being bent repeatedly, and the service life of the frame-free induction sheet of the touch screen is prolonged.
Description
Technical field
The present invention relates to touch-screen, especially relate to a kind of Rimless touch screen induction sheet, the invention still further relates to the preparation method of this Rimless touch screen induction sheet.
Background technology
Touch screen induction sheet will be realized touch controllable function, need to be at the transparency conducting layer of the viewfinder area of touch-screen fabricating patterned, the transparency conducting layer of these patternings can detect finger touch position, and the conductive electrode by periphery is transferred to control chip by the signal detecting, control chip is analyzed, is processed signal, finally determines touch location.At present as the material of conductive electrode, take silk-screen silver slurry and plated metal as main: with silver-colored, starch while doing conductive electrode, expensive due to silver slurry, can improve the cost of raw material of touch-screen, and the method need to increase silver slurry silk-screen and laser lithography operation, easily produce defective products; The method that adopts metal to deposit is done conductive electrode and also can, because of complex procedures (need to process lead-in wire electrode district at the periphery of touch-screen), be caused the production cost of touch-screen to increase.Because silver slurry or metal are the materials that can not bend, while using as touch screen electrode, can limit the bending performance of touch-screen; Because silver is starched and metal itself is opaque, can produce opaque frame at the edge of touch screen induction sheet simultaneously.
Summary of the invention
The object of the present invention is to provide the Rimless touch screen induction sheet that a kind of manufacturing procedure is simple, yields is high, the present invention also provides the preparation method of this Rimless touch screen induction sheet.
For achieving the above object, the present invention can take following technical proposals:
Rimless touch screen induction sheet of the present invention, comprise touch-screen conduction region and coupled conductive electrode, described conductive electrode is arranged the one end that extends to touch-screen conduction region along both sides, touch-screen conduction region frame, described conductive electrode is Graphene electrodes line.
Described touch-screen conduction region and graphene conductive electrode comprise substrate and are transferred to described suprabasil graphene film to transfer, have the substrate of graphene film to carry out laser ablation/chemical corrosion/ion etching and make can form touch-screen conduction region and Graphene electrodes line after its patterning.
The graphene film in described conductive electrode district can repeatedly shift, to reduce the resistance of described Graphene electrodes line.
The preparation method of Rimless touch screen induction sheet of the present invention comprises the steps:
The first step, prepares graphene film
Substrate is put into tubular furnace, be evacuated to pressure 4 ~ 8 * 10
-2torr; In tubular furnace, pass into argon gas, reach an atmospheric pressure to pressure in body of heater; And then tubular furnace is evacuated to the mixed gas that passes into carbon source gas and hydrogen after vacuum, and wherein the mol ratio of carbon source gas and hydrogen is 1:3 ~ 1:4, keeping the pressure in tubular furnace is 1 atmospheric pressure; By diamond heating to 1000 ~ 1100 ℃, and keep 60 minutes, during continue to inject mixed gas, flow velocity keeps 40sccm, after meeting the requirements, stops heating to the graphene layer of Grown, is evacuated to pressure 4 ~ 8 * 10
-2torr; In tubular furnace, pass into argon gas, after internal pressure reaches 1 atmospheric pressure, temperature in stove is down to normal temperature, take out the substrate that superficial growth has graphene film;
Second step, shifts
After the graphene film of substrate and substrate are bonded together, put into defoamer, under 60 ℃ of conditions, keep 30 minutes, make binding face without bubble; Put it into baking box, 100 ~ 200 ℃ are toasted 5 ~ 20 minutes, after taking-up, with corrosive liquid, remove substrate, leave the substrate with graphene film again;
The 3rd step, patterning
In substrate, adopt the method for laser ablation/chemical corrosion/ion etching to make its patterning, can obtain full Graphene Rimless touch screen induction sheet.
Described substrate is Copper Foil or nickel foil; Described carbon source gas is methane, ethane, ethene or acetylene.
Described substrate is PET film, and described corrosive liquid is the FeCl3 solution of concentration 20% ~ 70%.
The transfer step of second step repeats at substrate periphery, can make the graphene film number of plies in substrate periphery conductive electrode district increase.
After the 3rd step completes, can also cover one deck adhesive coating and press FPC soft board at Graphene patterned surfaces, then paste PET cover plate thereon.
The invention has the advantages that and reduce raw-material use in transfer, have in the substrate of Graphene directly with Graphene as conductive electrode, can reduce manufacturing cost; Simplify production process, improved the yield of product; Finished product touch screen induction sheet Rimless, can repeatedly bend, and has extended serviceable life.
Accompanying drawing explanation
Fig. 1 is the signal pattern of the touch screen induction sheet prepared of the inventive method.
Fig. 2 is the sectional drawing of the touch-screen with cover plate prepared of the present invention.
Embodiment
As shown in Figure 1, Rimless touch screen induction sheet of the present invention, comprise touch-screen conduction region 1 and coupled conductive electrode 2, conductive electrode 2 is arranged the one end that extends to touch-screen conduction region along both sides, touch-screen conduction region frame, by FPC, contact control chip, for saving material, to avoid producing opaque frame at the edge of touch screen induction sheet, this conductive electrode 2 is Graphene electrodes line.
Described touch-screen conduction region and graphene conductive electrode comprise substrate and are transferred to described suprabasil graphene film to transfer, have the substrate of graphene film to carry out laser ablation/chemical corrosion/ion etching and make can form touch-screen conduction region and Graphene electrodes line after its patterning.
The graphene film in conductive electrode district can repeatedly shift, to reduce the resistance of Graphene electrodes line.
The preparation method of Rimless touch screen induction sheet of the present invention comprises the steps:
The first step, prepares Graphene
1, Copper Foil (or nickel foil) surface is clean by alcohol wipe, and put into plasma apparatus and clean, remove the impurity of copper foil surface;
2, Copper Foil (or nickel foil) is put into the tubular furnace with snorkel and vacuum meter successively, and tubular furnace is sealed;
3, tubular furnace internal gas pressure is evacuated to vacuum state, pressure is 4 ~ 8 * 10
-2torr;
4, purity is injected in tubular furnace by snorkel higher than 99.99% argon gas, until the pressure in tubular furnace reaches an atmospheric pressure;
5, repeat 3 ~ 4 step at least five times, to guarantee thoroughly to get rid of the air in tubular furnace;
6, tubular furnace internal gas pressure is evacuated to the mixed gas that injects methane and hydrogen (methane also can use ethane, ethene or acetylene to substitute) after vacuum state, the mol ratio of mixed gas is methane: hydrogen=1:3 ~ 1:4, and the purity of mixed gas reaches more than 99.99%; After injecting mixed gas, the interior pressure of tubular furnace reaches an atmospheric pressure;
7, by diamond heating to 1000 ~ 1100 ℃, and keep 60 minutes, this process also will continue to inject the mixed gas of methane and hydrogen, and flow velocity keeps 40sccm left and right; Time in this step is variable, and the time is longer, and the Graphene number of plies of growing on Copper Foil is more;
8, tubular furnace stops heating, and is evacuated to pressure 4 ~ 8 * 10
-2torr;
9, purity is injected in tubular furnace by snorkel higher than 99.99% argon gas, until the pressure in tubular furnace reaches an atmospheric pressure; Step 8,9 object are to continue at copper foil surface growing graphene in temperature-fall period in order to prevent;
10, in stove, temperature is down to after normal temperature, takes out the Copper Foil that superficial growth has 1 ~ 3 layer graphene.
Second step, shifts
The graphene film of substrate and substrate (can select PET film, also useable glass or other transparent materials, thickness can be 10 ~ 1000 um) are put into defoamer by heat-sensitive glue or UV glue bond together afterwards, under 60 ℃ of conditions, keep 30 minutes, make binding face without bubble; Put it into baking box, 100 ~ 200 ℃ of bakings 5 ~ 20 minutes (general 150 ℃ baking 5 minutes), take out afterwards and are preferably 30% with concentration 20% ~ 70%(again) FeCl3 solution removal substrate, leave the substrate with graphene film; If the transfer step of second step is repeated at substrate periphery, can make the graphene film number of plies in substrate periphery conductive electrode district increase, can effectively reduce like this resistance of Graphene electrodes line;
The 3rd step, patterning
In substrate, adopt the method for laser ablation (also can adopt chemical corrosion or ion etching) to make its patterning (what show in Fig. 1 is triangle pattern), can obtain full Graphene Rimless touch screen induction sheet.
After the 3rd step completes, can also cover one deck adhesive coating (OCA of optional thickness 50 um at Graphene patterned surfaces, be optical lens gelatin) and pressing FPC soft board (flexible PCB) (FPC soft board is by ACF(anisotropic conductive adhesive) pressing on Graphene surface), then paste PET cover plate (PET cover plate was pasted together by the graphene-based end of OCA and patterning) thereon, the Rimless finally obtaining and be flexible touch-screen section and see Fig. 2, be followed successively by PET basalis 3 from bottom to top, graphene layer 4, OCA adhesive coating 5 and PET cover plate 6, on graphene layer 4, pressing FPC soft board 7.
Claims (8)
1. a Rimless touch screen induction sheet, comprise touch-screen conduction region and coupled conductive electrode, described conductive electrode is arranged the one end that extends to touch-screen conduction region along both sides, touch-screen conduction region frame, it is characterized in that: described conductive electrode is Graphene electrodes line.
2. Rimless touch screen induction sheet according to claim 1, it is characterized in that: described touch-screen conduction region and graphene conductive electrode comprise substrate and be transferred to described suprabasil graphene film to transfer, have the substrate of graphene film to carry out laser ablation/chemical corrosion/ion etching and make can form touch-screen conduction region and Graphene electrodes line after its patterning.
3. Rimless touch screen induction sheet according to claim 1 and 2, is characterized in that: the graphene film in described conductive electrode district can repeatedly shift, to reduce the resistance of described Graphene electrodes line.
4. the preparation method of Rimless touch screen induction sheet according to claim 2, is characterized in that: comprise the steps:
The first step, prepares graphene film
Substrate is put into tubular furnace, be evacuated to pressure 4 ~ 8 * 10
-2torr; In tubular furnace, pass into argon gas, reach an atmospheric pressure to pressure in body of heater; And then tubular furnace is evacuated to the mixed gas that passes into carbon source gas and hydrogen after vacuum, and wherein the mol ratio of carbon source gas and hydrogen is 1:3 ~ 1:4, keeping the pressure in tubular furnace is 1 atmospheric pressure; By diamond heating to 1000 ~ 1100 ℃, and keep 60 minutes, during continue to inject mixed gas, flow velocity keeps 40sccm, after meeting the requirements, stops heating to the graphene layer of Grown, is evacuated to pressure 4 ~ 8 * 10
-2torr; In tubular furnace, pass into argon gas, after internal pressure reaches 1 atmospheric pressure, temperature in stove is down to normal temperature, take out the substrate that superficial growth has graphene film;
Second step, shifts
After the graphene film of substrate and substrate are bonded together, put into defoamer, under 60 ℃ of conditions, keep 30 minutes, make binding face without bubble; Put it into baking box, 100 ~ 200 ℃ are toasted 5 ~ 20 minutes, after taking-up, with corrosive liquid, remove substrate, leave the substrate with graphene film again;
The 3rd step, patterning
In substrate, adopt the method for laser ablation/chemical corrosion/ion etching to make its patterning, can obtain full Graphene Rimless touch screen induction sheet.
5. the preparation method of Rimless touch screen induction sheet according to claim 4, is characterized in that: described substrate is Copper Foil or nickel foil; Described carbon source gas is methane, ethane, ethene or acetylene.
6. the preparation method of Rimless touch screen induction sheet according to claim 4, is characterized in that: described substrate is PET film, and described corrosive liquid is the FeCl3 solution of concentration 20% ~ 70%.
7. the preparation method of Rimless touch screen induction sheet according to claim 4, is characterized in that: the transfer step of second step repeats at substrate periphery, can make the graphene film number of plies in substrate periphery conductive electrode district increase.
8. the preparation method of Rimless touch screen induction sheet according to claim 4, is characterized in that: after the 3rd step completes, can also cover one deck adhesive coating and press FPC soft board at Graphene patterned surfaces, then paste PET cover plate thereon.
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| CN201410262106.9A CN103995619A (en) | 2014-06-13 | 2014-06-13 | Frame-free induction sheet of touch screen and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106445265A (en) * | 2016-10-14 | 2017-02-22 | 深圳市宇顺工业智能科技有限公司 | Capacitive touch screen and manufacturing method thereof |
| CN106624371A (en) * | 2016-12-29 | 2017-05-10 | 无锡格菲电子薄膜科技有限公司 | Method for forming patterned graphene on target device |
| CN106842725A (en) * | 2017-03-14 | 2017-06-13 | 深圳市华星光电技术有限公司 | Graphene electrodes preparation method and liquid crystal display panel |
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| CN103455229A (en) * | 2013-09-12 | 2013-12-18 | 南京耐琪光电科技有限公司 | One-piece connection structure of capacitive touch screen and manufacturing method thereof |
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| US20090297739A1 (en) * | 2006-07-17 | 2009-12-03 | E.I. Du Pont De Nemours And Company | Metal compositions, thermal imaging donors and patterned multilayer compositions derived therefrom |
| US20130140061A1 (en) * | 2011-05-26 | 2013-06-06 | Lg Innotek Co., Ltd. | Touch Window |
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| CN106445265A (en) * | 2016-10-14 | 2017-02-22 | 深圳市宇顺工业智能科技有限公司 | Capacitive touch screen and manufacturing method thereof |
| CN106624371A (en) * | 2016-12-29 | 2017-05-10 | 无锡格菲电子薄膜科技有限公司 | Method for forming patterned graphene on target device |
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Application publication date: 20140820 |