CN103324376A - One-chip type capacitive touch screen and preparation method thereof - Google Patents
One-chip type capacitive touch screen and preparation method thereof Download PDFInfo
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- CN103324376A CN103324376A CN201310289625XA CN201310289625A CN103324376A CN 103324376 A CN103324376 A CN 103324376A CN 201310289625X A CN201310289625X A CN 201310289625XA CN 201310289625 A CN201310289625 A CN 201310289625A CN 103324376 A CN103324376 A CN 103324376A
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Abstract
The invention discloses a one-chip type capacitive touch screen. A functional region is divided into a window touch control area and a non-window area. The one-chip type capacitive touch screen structurally comprises a glass cover board, a first transparent conductive layer, a first electrode layer and an ink layer, wherein the first transparent conductive layer is arranged on the surface of the lower side of the glass cover board and is provided with patterns in the first direction; the first electrode layer is formed in the non-window area and on the surface of the first transparent conductive layer; the ink layer is arranged in the non-window area on the upper side of the glass cover board and used for the invisible effect of the non-window area. The one-chip type capacitive touch screen solves the problems that due to the height difference caused by an ink layer existing in a graphene capacitive touch screen, a graphene transparent conductive layer collapses and fractures easily, or bubbles exist. The one-chip type capacitive touch screen also solves the problem that the ink layer is corroded easily when laser direct writing is adopted for etching the graphene transparent conductive thin film, and technical obstacles are removed for application of the OGS one-chip type capacitive touch screen structure on the graphene capacitive touch screen.
Description
Technical field
The invention belongs to the touch screen technology field, relate to a kind of monolithic capacitive touch screen and preparation method thereof, be specifically related to a kind of monolithic capacitive touch screen based on graphene film and preparation method thereof, particularly a kind of monolithic capacitive touch screen take transparent graphene conductive film as electrode material and preparation method thereof.
Background technology
Touch-screen is a kind of input equipment, can conveniently realize the reciprocation of people and computing machine and other portable mobile apparatus, the functional area of touch-screen is (Fig. 1 is the functional regional division of touch-screen) as shown in Figure 1, can be divided into form Touch Zone 100 and non-viewfinder area 200, and flexible PCB FPC300 and data processing chip IC chip 400 that electrical connection is provided.In recent years, be widely used in mobile InterWorking Equipment based on the capacitance touch screen of tin indium oxide (ITO) transparent conductive film, such as smart mobile phone, Portable tablet personal computer.
Along with mobile InterWorking Equipment is more and more higher to the requirement of the aspects such as screen reflecting rate, transmittance and thickness is frivolous, tradition adopts biplate glass (high rigidity glass cover-plate and with the glass of the sensing electrode) capacitance touch screen that forms of fitting to be difficult to meet the demands.A kind of OGS(One of being called Glass Solution) monolithic capacitive touch screen scheme is suggested and applies, and becomes the important directions of touch-screen of new generation.
The structure of described monolithic capacitive touch screen comprises: glass cover-plate 10 shown in Fig. 2 (Fig. 2 is the cross-sectional view of monolithic capacitive touch screen in the prior art); Be printed on the ink lay 50 of glass cover-plate 10 downside surfaces in the non-viewfinder area scope; Continue to be formed at the transparency conducting layer 21 of glass cover-plate 10 and ink lay 50 downsides; In non-viewfinder area scope, be formed at the electrode layer 22 of layer at transparent layer 21; And the protective shield 40 that is fitted and connected by OCA optical cement 32.The OGS monolithic capacitive touch screen directly forms conduction and sensing electrode at the high rigidity cover glass cover plate back side, plays simultaneously the double action that touches protection and touch-control sensing with same glass.
In the prior art, ITO is for mainly as the material of transparency conducting layer being, ITO has very crisp frangible as the transparency conducting layer of capacitive touch screen, and the life-span is short; Need pyroprocessing just can have high conductivity after the film forming; The shortcomings such as raw material costliness.Therefore, seek suitable ITO equivalent material and become a current difficult problem that needs to be resolved hurrily.
Graphene (Graphene) is that a kind of hexangle type that is comprised of sp2 hydridization carbon atom is honey comb like two-dimensional nano material, have the transmissivity up to 97.4%, and at visible light wave range and Wavelength-independent, transmitted spectrum is almost flat condition; And in transmitance maintains 95% scope the time, square resistance still can reach 125 Ω/, has reached quality standard (400～900 Ω/) of industry member transparency electrode; Simultaneously, the tone of Graphene is fully colourless; Can be on touch-screen reproduced image color verily.
But Graphene is applied to the OGS monolithic capacitive touch screen, have following shortcoming: (1) need to adopt laser direct-writing to portray pattern based on the transparency conducting layer of Graphene, laser direct-writing can be with existing printing ink on the glass cover-plate together etching, cause product appearance to produce defective, and the printing ink of anti-laser ablation is still waiting exploitation; (2) Graphene is transferred to on the glass cover-plate of ink lay the time, the bed thickness of ink lay causes the drop between ink lay and form Touch Zone, and the ink lay surface smoothness is not as glass surface, affected adhering between graphene layer and the cover plate, easily cause the fracture of graphene layer, or between graphene layer and cover plate or ink lay, form bubble.
Therefore, with existing OGS monolithic capacitive touch screen technology, realize that the OGS monolithic capacitive touch screen based on graphene conductive film is very difficult.
Summary of the invention
For prior art in the OGS monolithic capacitive touch screen process of preparation based on graphene conductive film, because the Graphene transparency conducting layer that the existence of ink lay causes can't patterning, and the Graphene transparency conducting layer easily ruptures, easily produce the problems such as bubble, propose a kind of monolithic capacitive touch screen and preparation method thereof.
Monolithic capacitive touch screen of the present invention, functional regional division are form Touch Zone and non-viewfinder area, and the structure of described monolithic capacitive touch screen comprises:
(i) glass cover-plate;
(ii) be formed at the first transparency conducting layer on the glass cover-plate downside surface, described the first transparency conducting layer has the pattern along first direction;
(iii) in non-viewfinder area scope, be formed at the first electrode layer of the first layer at transparent layer;
(iv) in the non-viewfinder area of glass cover-plate upside, ink lay is set, is used to form the not visible effect of non-viewfinder area.
Preferably, described glass cover-plate is provided with the transparent window plate, and described ink lay is formed on the lower surface of transparent window plate; Perhaps, described ink lay is formed on the surface of described glass cover-plate upside, and the transparent window plate is set thereon;
Wherein, described transparent window plate is connected by the upper strata adhesive member with glass cover-plate.
Preferably, described monolithic capacitive touch screen also has protective shield, and described protective shield is positioned at the glass cover-plate downside, and is connected with glass cover-plate by lower floor's adhesive member.
Preferably, described monolithic capacitive touch screen also has protective shield, and described protective shield is positioned at the glass cover-plate downside, is formed with the second transparency conducting layer at the protective shield uper side surface, and is formed at the second electrode lay in the non-viewfinder area scope of the second layer at transparent layer; Described the second transparency conducting layer has the pattern along second direction; Described protective shield is connected with glass cover-plate by lower floor's adhesive member.
Preferably, described monolithic capacitive touch screen has flexible PCB and IC chip, is used for the touch location on the electric capacity touch screen is processed.
Preferably, described the first transparency conducting layer and the second transparency conducting layer are the Graphene transparency conducting layer, and preferred thickness is the Graphene transparency conducting layer of 0.3～3nm.
Preferably, the thickness of described the first electrode layer and the second electrode lay is 30～350nm, preferred 50～300nm.
Preferably, described the first electrode layer and the second electrode lay comprise the silver electrode layer.
Preferably, the thickness of described ink lay is 4～6 μ m.
Preferably, described first direction is directions X, and second direction is Y-direction.
Preferably, the thickness of described glass cover-plate is 0.5～1mm, preferred 0.7mm.
Preferably, the thickness of described transparent window plate and protective shield is independently selected from 50～150 μ m, preferred 125 μ m.
Preferably, the material of described transparent window plate and protective shield is independently selected from any one in PC, PMMA, PEN, PES, COC, PET, glass or the tempered glass, preferred PET.
Preferably, described transparent window plate is processed through NCVM.
Preferably, described upper strata adhesive member and lower floor's adhesive member comprise the OCA optical cement.
Preferably, the transmittance of described glass cover-plate, transparent window plate, protective shield, upper strata adhesive member and lower floor's adhesive member 〉=92%.
Preferably, the structure of described monolithic capacitive touch screen is followed successively by from the bottom to top: protective shield, lower floor's optical cement, the first electrode layer, the first transparency conducting layer, glass cover-plate, upper strata optical cement, ink lay and transparent window plate;
Perhaps, the structure of described monolithic capacitive touch screen is followed successively by from the bottom to top: protective shield, the second transparency conducting layer, the second electrode lay, lower floor's optical cement, the first electrode layer, the first transparency conducting layer, glass cover-plate, upper strata optical cement, ink lay and transparent window plate.
The present invention also provides a kind of preparation method of aforementioned monolithic capacitive touch screen, comprises the steps:
One glass cover-plate is provided;
Shift Graphene to the downside surface of described glass cover-plate, obtain the first transparency conducting layer;
Be coated with the first electrode layer in described the first layer at transparent layer;
The first transparency conducting layer and the first electrode layer to described glass cover-plate downside surface carry out the justifying patterning;
Binding FPC and IC chip;
Described the first layer at transparent layer is fitted by lower floor's adhesive member and protective shield upside;
Provide a transparent window plate, at described transparent window plate downside surface printing ink layer;
Described transparent window plate downside is conformed to the glass cover-plate uper side surface by the upper strata adhesive member;
The present invention also provides the preparation method of the another kind of aforementioned monolithic capacitive touch screen of stating, and comprises the steps:
One glass cover-plate is provided;
Shift Graphene to the downside surface of described glass cover-plate, obtain the first transparency conducting layer, and be coated with the first electrode layer in described the first layer at transparent layer;
The first transparency conducting layer and the first electrode layer to described glass cover-plate downside surface carry out the justifying patterning;
Binding FPC and IC chip;
One protective shield is provided;
Shift Graphene to the uper side surface of described protective shield, obtain the second transparency conducting layer, and be coated with the second electrode lay in described the second layer at transparent layer;
Described the first layer at transparent layer is fitted by lower floor's adhesive member and the second layer at transparent layer;
Provide a transparent window plate, at described transparent window plate downside surface printing ink layer;
Described transparent window plate downside is conformed to the glass cover-plate uper side surface by adhesive member;
Compared with prior art, the present invention has following beneficial effect:
(1) solved based in the monolithic capacitive touch screen of grapheme material as transparency conducting layer, because there is the height fall that causes in ink lay, the Graphene transparency conducting layer that the causes fracture of easily subsiding, or there are problems such as bubble, increase the adhesion between graphene film and the substrate, improved the quality stability of monolithic capacitive touch screen;
(2) solved based in the monolithic capacitive touch screen of grapheme material as transparency conducting layer, adopted laser direct-writing etching transparent graphene conductive film, be easy to the problem that ink lay is etched away when carrying out patterning; Need not to carry out the exploitation of the printing ink of anti-the laser ablation;
(3) after the transparent window plate was processed through NCVM, product surface wearing quality and hardness were improved, and have the outward appearance of metal-like, and do not affect the effect of wireless communication transmission;
Owing to having solved above problem, the preparation process of Graphene monolithic capacitive touch screen has been avoided complicated, expensive gold-tinted processing procedure, can adopt simply laser direct-writing portrayal pattern, for technology barrier has been cleared away in the application of OGS single chip type capacitive touch screen structure on the Graphene capacitance touch screen, search out the substitute of ITO, reduced the production cost of touch-screen.
Description of drawings
Fig. 1 is the functional regional division schematic diagram of touch-screen;
Fig. 2 is the cross-sectional view of monolithic capacitive touch screen in the prior art;
Fig. 3 is the cross-sectional view of the monolithic capacitive touch screen 1000 of one embodiment of the present invention
Fig. 4 is the cross-sectional view of the monolithic capacitive touch screen 2000 of the second embodiment of the present invention;
Fig. 5 is the cross-sectional view of the monolithic capacitive touch screen 3000 of the third embodiment of the present invention;
Wherein, 100 form Touch Zones; 200 non-viewfinder areas; 300 flexible PCB FPC; The 400IC chip;
10 glass cover-plates; 21 transparency conducting layers; 22 electrode layers; The 32OCA optical cement; 40 protective shields; 50 ink laies;
1010 glass cover-plates; 1,021 first Graphene transparency conducting layers; 1,022 first electrode layers; 1031 upper strata adhesive members; 1032 lower floor's adhesive members; 1040 protective shields; 1050 ink laies; 1060 transparent window plates;
3010 glass cover-plates; 3,021 first Graphene transparency conducting layers; 3,022 first electrode layers; 3,023 second Graphene transparency conducting layers; 3024 the second electrode lays; 3031 upper strata adhesive members; 3032 lower floor's adhesive members; 3040 protective shields; 3050 ink laies; 3060 transparent window plates.
Embodiment
Next, with reference to the accompanying drawings in detail, the specific embodiment of the present invention is described in detail.In description of the invention, term " first " " second " " upper strata " " lower floor " etc. is used for an element and another element region are separated, and described element is not defined by above-mentioned term.In addition, for the description of known technology, even they are related to the present invention, if but be considered to unnecessary, then when they can make feature of the present invention and description not know, they can be omitted.
The problem to be solved in the present invention is 1. based on the capacitive touch screen of Graphene transparency conducting layer, because the existence of ink lay causes the Graphene transparency conducting layer that the bubble out-of-flatness is arranged, and the fracture of easily subsiding at the edge of ink lay; 2. based on the patterning difficulty of the capacitive touch screen of Graphene transparency conducting layer, laser direct-writing portrayal pattern easily causes losing of ink lay, causes open defect.
In order to address this problem, the invention provides a kind of monolithic capacitive touch screen (OGS), the position of described OGS ink lay unlike the prior art, in the prior art, ink lay is positioned at the downside of glass cover-plate, ink lay among the present invention is positioned at the upside of glass cover-plate, can solve because the existence of ink lay the subsiding or the problem such as fracture of the transparency conducting layer that causes; On the other hand, in the OGS preparation process, carry out after the printing process of ink lay can being arranged on the portrayal of transparency conducting layer and electrode layer pattern, thereby solved the etching problem of the ink lay that Graphene transparency conducting layer laser direct-writing patterning causes.
In order to make purpose of the present invention, technical scheme and advantage are clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Touch-screen of the present invention can be included in the terminal, such as mobile phone, televisor, monitor, portable notebook, laptop computer, graphic tablet, equipment operating interface etc.
Embodiment one
Fig. 3 has provided the cross-sectional view of the monolithic capacitive touch screen 1000 of one embodiment of the present invention.As shown in Figure 3, monolithic capacitive touch screen 1000 comprises: glass cover-plate 1010; Transfer is at the first Graphene transparency conducting layer 1021 of glass cover-plate 1010 downside surfaces; Be deposited on first electrode layer 1022 on the first Graphene transparency conducting layer 1021 surfaces, 1022 of described the first electrode layers are present in the non-viewfinder area scope of monolithic capacitive touch screen 1000; Be positioned at the transparent window plate 1060 of glass cover-plate 1010 upsides; Be printed on the ink lay 1050 of transparent window plate 1060 downside surfaces; The upper strata adhesive member 1031 that is used for applying transparent window plate 1060 and glass cover-plate 1010; Be positioned at the protective shield 1040 of glass cover-plate 1010 downsides; The lower floor's adhesive member 1032 that is used for applying protective shield 1040 and glass cover-plate 1010.
In the present embodiment, the first Graphene transparency conducting layer 1021 is formed for identifying the sensor of the touch location of people's the finger tip on transparent window plate 1060 surfaces or object (such as capacitance pen).The thickness of described the first Graphene transparency conducting layer 1021 is 0.3～3nm, is approximately 1～10 layer graphene layer.Because glass cover-plate 1010 downside surfaces are very smooth, can not cause subsiding, rupture or producing the problem such as bubble of the graphene layer that only has 0.3～3nm thickness.
In the present embodiment, the first electrode layer 1022 sends the IC chip for the touch signal that the first Graphene transparency conducting layer 1021 is sensed to by flexible PCB.The thickness of described the first electrode layer 1022 can be 30～350nm, is preferably 50～300nm.Described the first electrode layer 1022 is made by high conductive material, for example can be to be made by conductive silver (Ag) slurry or other metal electrodes, is perhaps made by conducting polymer, ITO or Graphene.
The first Graphene transparency conducting layer 1021 and the first electrode layer 1022 should pass through patterning, and the shape of described patterning can be strip, rhombus, hexagon, triangle etc., can carry out global pattern by laser direct-writing.The given cross-sectional view of Fig. 3 is exactly the sectional view that carries out along perpendicular to pattern direction.
In the present embodiment, transparent window plate 1060 and protective shield 1040 can be formed by the insulating material to visible transparent, preferred described insulating material is to the transmittance of visible light 〉=92%, the example of described insulating material can comprise the PC(polycarbonate), the PMMA(polymethyl methacrylate), the PEN(PEN), the PES(polyethersulfone), the COC(cyclic olefine copolymer), the poly-para Toluic Acid's glycol ester of PET(), glass or tempered glass etc., preferred PET.Described transparent window plate is preferably processed through NCVM, and described NCVM claims again discontinuous coating technique or non-conductive electroplating technology.NCVM adopts and plates out the films such as metal and insulating compound, utilizes each mutually discontinuous characteristic, obtains the effect that FINAL APPEARANCE has metal-like and do not affect wireless communication transmission.Wearing quality and the hardness of transparent window plate were improved after NCVM processed, and had the outward appearance of metal.
In the present embodiment, be applied with touch input from special object (such as people's finger tip or capacitance pen etc.) on the transparent window plate 1060; The ink lay 1050 that is printed in transparent window plate 1060 downside surfaces plays the effect of barrier electrode layer, so 1050 of ink laies are printed in the scope of non-viewfinder area of transparent window plate 1060 downside surfaces.The process that transparent window plate 1060 and glass cover-plate 1010 are fitted is: the transparent window plate 1060 that downside is printed with ink lay 1050 is fitted in the uper side surface that downside has covered the glass cover-plate 1010 of the first Graphene transparency conducting layer 1021 of patterning and the first electrode 1022 by upper strata adhesive member 1031.Therefore, can avoid laser direct-writing to the damage of ink lay, keep the complete of ink lay, so that the outward appearance of the monolithic capacitive touch screen that provides is complete.
In the present embodiment, protective shield 1040 plays and protects the first Graphene transparency conducting layer 1021 and the first electrode 1022 not by the effect of outside destroy.Protective shield 1040 upsides are connected with glass cover-plate 1010 by lower floor's adhesive member 1032, specifically, the downside surface of glass cover-plate 1010 is coated with the first Graphene transparency conducting layer 1021 and the first electrode 1022, again at the surface applying lower floor adhesive member 1032 of the first Graphene transparency conducting layer 1021 and the first electrode 1022, the uper side surface of bonding protective shield 1040 afterwards.
Embodiment two
Fig. 4 has provided the cross-sectional view of the monolithic capacitive touch screen 2000 of the second embodiment of the present invention.Be with the difference of embodiment one, ink lay 1050 is formed at the uper side surface of glass cover-plate 1010, connects (bonding) transparent window plate 1060 by upper strata adhesive member 1031 afterwards.
Embodiment three
Fig. 5 has provided the cross-sectional view of the monolithic capacitive touch screen 3000 of the third embodiment of the present invention.As shown in Figure 5, monolithic capacitive touch screen 3000 comprises: glass cover-plate 3010; Transfer is at the first Graphene transparency conducting layer 3021 of glass cover-plate 3010 downside surfaces; Be deposited on first electrode layer 3022 on the first Graphene transparency conducting layer 3021 surfaces; Be positioned at the transparent window plate 3060 of glass cover-plate 3010 upsides; Be printed on the ink lay 3050 of transparent window plate 3060 downside surfaces; The upper strata adhesive member 3031 that is used for applying transparent window plate 3060 and glass cover-plate 3010; Be positioned at the protective shield 3040 of glass cover-plate 3010 downsides; Transfer is at the second Graphene transparency conducting layer 3023 of protective shield 3040 uper side surfaces; Be deposited on the second electrode lay 3024 on the second Graphene transparency conducting layer 3023 surfaces; The lower floor's adhesive member 3032 that is used for applying protective shield 3040 and glass cover-plate 3010; Wherein, 3024 of the first electrode layer 3022 and the second electrode lays are present in the non-viewfinder area scope of monolithic capacitive touch screen 3000.
In the present embodiment, the first Graphene transparency conducting layer 3021 and the first electrode layer 3022 have the pattern along first direction, the second Graphene transparency conducting layer 3023 and the second electrode lay 3024 have the pattern along second direction, the shape of described pattern can be strip, rhombus, hexagon, triangle etc., and described pattern can carry out global pattern by laser direct-writing.In the present embodiment, first direction is directions X (or horizontal direction), and second direction is Y-direction (or vertical direction), and in other embodiments, first direction and second direction can be oblique direction.The given cross-sectional view of Fig. 5 is exactly the sectional view that carries out along Y-direction.
In the present embodiment, protective shield 3040 not only plays protects the first Graphene transparency conducting layer 3021 and the first electrode 3022 not by the effect of outside destroy, and also the while exists as the substrate of the second Graphene transparency conducting layer 3023.Protective shield 3040 is fitted by lower floor's adhesive member 3032 and glass cover-plate 3010, and specifically, the downside surface of glass cover-plate 3010 is coated with the first Graphene transparency conducting layer 3021 and the first electrode 3022; The uper side surface of protective shield 3040 is coated with the second Graphene transparency conducting layer 3023 and the second electrode 3024; Lower floor's adhesive member 3032 is bonded in the surface of the first Graphene transparency conducting layer 3021 and the second Graphene transparency conducting layer 3023, can fit protective shield 3040 and glass cover-plate 3010.
Certainly, in the present embodiment, ink lay 3050 also can be formed at the uper side surface of glass cover-plate 3010, connects (bonding) transparent window plate 3060 by upper strata adhesive member 3031 afterwards.
Embodiment four
A kind of preparation method of monolithic capacitive touch screen, described preparation method comprises the steps:
Step 101 a: glass cover-plate 1010 is provided;
Step 102: shift Graphene to the downside surface of described glass cover-plate 1010, obtain the first Graphene transparency conducting layer 1021; And be coated with the first electrode layer 1022 on the surface of described the first Graphene transparency conducting layer 1021;
Wherein, described the first Graphene transparency conducting layer 1021 is preferably 3～10 layer graphenes, and thickness is preferably 0.3～3nm; Described the first electrode layer 1022 is preferably the thick organic silver electrode layer of 30～350nm;
Step 103: the first Graphene transparency conducting layer 1021 and the first electrode layer 1022 to described glass cover-plate 1010 downside surfaces carry out the justifying patterning;
Step 104: binding FPC300 and IC chip 400;
Step 105: fitted by lower floor's adhesive member 1032 and protective shield 1040 uper side surfaces in described the first Graphene transparency conducting layer 1021 surfaces;
Step 106: provide a transparent window plate 1060, printing ink layer 1050 between described transparent window plate 1060 and glass cover-plate 1010;
Described ink lay 1050 can be positioned at the lower floor surface of transparent window plate 1060, also can be positioned at the upper surface of glass cover-plate 1010;
Step 107: described transparent window plate 1060 downsides are conformed to glass cover-plate 1010 uper side surfaces by upper strata adhesive member 1031;
Step 101～107 can prepare monolithic capacitive touch screen 1000 or monolithic capacitive touch screen 2000.
Embodiment five
A kind of preparation method of monolithic capacitive touch screen, described preparation method comprises the steps:
Step 301 a: glass cover-plate 3010 is provided;
Step 302: shift Graphene to the downside surface of described glass cover-plate 3010, obtain the first transparency conducting layer 3021, and be coated with the first electrode layer 3022 on described the first transparency conducting layer 3021 surfaces;
Wherein, described the first Graphene transparency conducting layer 3021 is preferably 3～10 layer graphenes, and thickness is preferably 0.3～3nm; The first electrode layer 3022 is preferably the thick organic silver electrode layer of 30～350nm;
Step 303: the first transparency conducting layer 3021 and the first electrode layer 3022 to described glass cover-plate 3010 downside surfaces carry out the justifying patterning;
Wherein, the first transparency conducting layer 3021 and the first electrode layer 3022 have the pattern along first direction, and described first direction is preferably directions X (or horizontal direction);
Step 304: binding FPC300 and IC chip 400;
Step 305 a: protective shield 3040 is provided;
Step 306: shift Graphene to the uper side surface of described protective shield 3040, obtain the second transparency conducting layer 3023, and be coated with the second electrode lay 3024 on described the second transparency conducting layer 3023 surfaces;
Step 307: the second transparency conducting layer 3023 and the second electrode lay 3023 to described protective shield 3040 uper side surfaces carry out the justifying patterning;
Wherein, the second transparency conducting layer 3023 and the 2 two electrode layer 3024 have the pattern along second direction, and described second direction is preferably Y-direction (or vertical direction);
Step 308: fitted by lower floor's adhesive member 3032 and the second transparency conducting layer 3023 surfaces in described the first transparency conducting layer 3021 surfaces;
Step 309: provide a transparent window plate 3060, at described transparent window plate 3060 downside surface printing ink layers 3050;
Described ink lay 3050 can be positioned at the lower floor surface of transparent window plate 3060, also can be positioned at the upper surface of glass cover-plate 3010;
Step 310: described transparent window plate 3060 downsides are conformed to glass cover-plate 3010 uper side surfaces by adhesive member 3032;
Step 301～310 can prepare the monolithic capacitive touch screen that monolithic capacitive touch screen 3000 or ink lay are positioned at glass cover-plate 3010 surfaces.
In the operation of printing ink layer provided by the invention, because the patterning operation of transparency conducting layer and electrode layer is finished, therefore the ink lay of printing this moment is the scope of final ink layer, can not cause damage, when having solved laser ablation transparency conducting layer and electrode layer and having carried out patterning, the problem that ink lay easily is etched away.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that namely the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of each raw material of product of the present invention and auxiliary element, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (10)
1. monolithic capacitive touch screen, functional regional division is form Touch Zone and non-viewfinder area, it is characterized in that, the structure of described monolithic capacitive touch screen comprises:
(i) glass cover-plate;
(ii) be formed at the first transparency conducting layer on the glass cover-plate downside surface, described the first transparency conducting layer has the pattern along first direction;
(iii) in non-viewfinder area scope, be formed at the first electrode layer of the first layer at transparent layer;
(iv) in the non-viewfinder area of glass cover-plate upside, ink lay is set, is used to form the not visible effect of non-viewfinder area.
2. monolithic capacitive touch screen as claimed in claim 1 is characterized in that, described glass cover-plate is provided with the transparent window plate, and described ink lay is formed on the lower surface of transparent window plate;
Perhaps, described ink lay is formed on the surface of described glass cover-plate upside, and the transparent window plate is set thereon;
Wherein, described transparent window plate is connected by the upper strata adhesive member with glass cover-plate.
3. monolithic capacitive touch screen as claimed in claim 1 or 2 is characterized in that, described monolithic capacitive touch screen also has protective shield, and described protective shield is positioned at the glass cover-plate downside, and is connected with glass cover-plate by lower floor's adhesive member.
4. monolithic capacitive touch screen as claimed in claim 1 or 2, it is characterized in that, described monolithic capacitive touch screen also has protective shield, described protective shield is positioned at the glass cover-plate downside, be formed with the second transparency conducting layer at the protective shield uper side surface, and be formed at the second electrode lay in the non-viewfinder area scope of the second layer at transparent layer; Described the second transparency conducting layer has the pattern along second direction; Described protective shield is connected with glass cover-plate by lower floor's adhesive member.
5. such as the described monolithic capacitive touch screen of one of claim 1～4, it is characterized in that, described monolithic capacitive touch screen has flexible PCB and IC chip, is used for the touch location on the capacitance touch screen is processed.
6. such as the described monolithic capacitive touch screen of one of claim 1～5, it is characterized in that, described the first transparency conducting layer and the second transparency conducting layer are the Graphene transparency conducting layer, and preferred thickness is the Graphene transparency conducting layer of 0.3～3nm;
Preferably, the thickness of described the first electrode layer and the second electrode lay is 30～350nm, preferred 50～300nm;
Preferably, described the first electrode layer and the second electrode lay comprise the silver electrode layer;
Preferably, the thickness of described ink lay is 4～6 μ m;
Preferably, described first direction is directions X, and second direction is Y-direction.
7. such as the described monolithic capacitive touch screen of one of claim 1～6, it is characterized in that, the thickness of described glass cover-plate is 0.5～1mm, preferred 0.7mm;
Preferably, the thickness of described transparent window plate and protective shield is independently selected from 50～150 μ m, preferred 125 μ m;
Preferably, the material of described transparent window plate and protective shield is independently selected from any one in PC, PMMA, PEN, PES, COC, PET, glass or the tempered glass, preferred PET;
Preferably, described transparent window plate is processed through NCVM;
Preferably, described upper strata adhesive member and lower floor's adhesive member comprise the OCA optical cement;
Preferably, the transmittance of described glass cover-plate, transparent window plate, protective shield, upper strata adhesive member and lower floor's adhesive member 〉=92%.
8. such as the described monolithic capacitive touch screen of one of claim 1～7, it is characterized in that, the structure of described monolithic capacitive touch screen is followed successively by from the bottom to top: protective shield, lower floor's optical cement, the first electrode layer, the first transparency conducting layer, glass cover-plate, upper strata optical cement, ink lay and transparent window plate;
Perhaps, the structure of described monolithic capacitive touch screen is followed successively by from the bottom to top: protective shield, the second transparency conducting layer, the second electrode lay, lower floor's optical cement, the first electrode layer, the first transparency conducting layer, glass cover-plate, upper strata optical cement, ink lay and transparent window plate.
9. the preparation method of a monolithic capacitive touch screen is characterized in that, described method comprises the steps: for the preparation of monolithic capacitive touch screen as claimed in claim 3
One glass cover-plate is provided;
Shift Graphene to the downside surface of described glass cover-plate, obtain the first transparency conducting layer;
Be coated with the first electrode layer in described the first layer at transparent layer;
The first transparency conducting layer and the first electrode layer to described glass cover-plate downside surface carry out the justifying patterning;
Binding FPC and IC chip;
Described the first layer at transparent layer is fitted by lower floor's adhesive member and protective shield upside;
Provide a transparent window plate, at described transparent window plate downside surface printing ink layer;
Described transparent window plate downside is conformed to the glass cover-plate uper side surface by the upper strata adhesive member.
10. the preparation method of a monolithic capacitive touch screen is characterized in that, described method is for the preparation of monolithic capacitive touch screen as claimed in claim 4, and described method comprises the steps:
One glass cover-plate is provided;
Shift Graphene to the downside surface of described glass cover-plate, obtain the first transparency conducting layer, and be coated with the first electrode layer in described the first layer at transparent layer;
The first transparency conducting layer and the first electrode layer to described glass cover-plate downside surface carry out the justifying patterning;
Binding FPC and IC chip;
One protective shield is provided;
Shift Graphene to the uper side surface of described protective shield, obtain the second transparency conducting layer, and be coated with the second electrode lay in described the second layer at transparent layer;
Described the first layer at transparent layer is fitted by lower floor's adhesive member and the second layer at transparent layer;
Provide a transparent window plate, at described transparent window plate downside surface printing ink layer;
Described transparent window plate downside is conformed to the glass cover-plate uper side surface by adhesive member.
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