CN104345967A - Sensing component for touch screens, preparation method of sensing component and touch screen - Google Patents
Sensing component for touch screens, preparation method of sensing component and touch screen Download PDFInfo
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- CN104345967A CN104345967A CN201410240566.1A CN201410240566A CN104345967A CN 104345967 A CN104345967 A CN 104345967A CN 201410240566 A CN201410240566 A CN 201410240566A CN 104345967 A CN104345967 A CN 104345967A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Abstract
In order to overcome the problem that the OPS touch screens in the prior art are complicated in manufacturing process and low in yield, the invention provides a sensing component for touch screens. The sensing component comprises a transparent flexible thin-film base and a sensing circuit which is located on the surface of the transparent flexible thin-film base, wherein the sensing circuit is a transparent conducting thin film which is 15-25 micron in thickness. The invention also provides a preparation method of the sensing component for touch screens and a touch screen using the sensing component for touch screens. The sensing component for touch screens is simple in manufacturing process, low in cost and high in yield.
Description
Technical field
The invention belongs to touch-screen field, particularly relate to a kind of touch-screen inductive component and preparation method thereof, and adopt the touch-screen of this inductive component.
Background technology
Touch-screen is a kind of remarkable input equipment improving man machine operation interface, have intuitively, simply, advantage efficiently.Touch-screen obtains a wide range of applications in many electronic products, such as mobile phone, PDA, multimedia, public information inquiry system etc.
As the core material that touch-control sensing loses, the application demand of electrically conducting transparent sensing material ITO (indium tin oxide) follows because contact panel is red as fire that when the river rises the boat goes up.But when large scale in touch-control application trend, especially when touch-screen size reach 13 cun even 15.6 cun time, for avoiding causing because screen size becomes large degradation problem under touch screen panel too high in resistance, sensing sensitivity, must the configuration of ito glass.
Along with current touch-screen is towards the trend development of lightweight, slimming, usually adopt OGS (the One Glass Solution) scheme of single-glass.But when making large scale OGS touch screen, binding yield is usually lower.And during using glass as Cover Lens, cannot curved touch screen be made.
To this, in prior art, have developed OPS (the One Plastic Solution) touch-screen of single thin film, adopt the glass in transparent flexible plastic film replacement OGS touch screen.But usual ITO sputtering process temperature higher (about 300 DEG C), very easily causes transparent flexible plastic deformation of thin membrane and opaque, greatly reduces the yield of product.And above-mentioned preparation method's cost is high, and efficiency is low.
Summary of the invention
Technical matters to be solved by this invention is the problem high for OPS technology for manufacturing touch screen cost of the prior art, yield is low, provides a kind of touch-screen inductive component.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
A kind of touch-screen inductive component is provided, comprises transparent flexible film substrate and be positioned at the induction line on transparent flexible film substrate surface; Described induction line is transparent conductive film, and its thickness is 15-25 μm.
According to the present invention, above-mentioned touch-screen inductive component is prepared on transparent flexible film substrate surface by the mode of exposure imaging, without the need at high temperature processing, high temperature effectively can be avoided the impact of transparent flexible film substrate, be beneficial to raising yield.And this touch-screen inductive component cost is low.
Meanwhile, present invention also offers the preparation method of above-mentioned touch-screen inductive component, comprising:
S1, provide transparent flexible film substrate;
S2, attach in transparent flexible film substrate thickness be 15-25 μm can transfer printing transparent conductive film;
S3, to transparent flexible film substrate can carry out exposure-processed by transfer printing transparent conductive film, then to leave standstill; The method of described exposure-processed is: employing wavelength is 365nm, energy is 30-60mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film;
S4, adopt pH value to be 10.5-11.5 developer solution to development treatment can be carried out by transfer printing transparent conductive film after exposure-processed, obtain conductive pattern;
S5, process is cured to conductive pattern, obtains the induction line that thickness is 15-25 μm; Described solidification processing method is: employing wavelength is 365nm, energy is 500-1000mj/cm
2uV illumination penetrate described conductive pattern.
The present invention adopts can transfer printing transparent conductive film, forms the induction line that thickness is 15-25 μm by the mode of exposure imaging on transparent flexible film substrate surface.Without the need at high temperature processing, high temperature effectively can be avoided the impact of transparent flexible film substrate, improve yield, reduce production cost simultaneously.
In addition, present invention also offers a kind of touch-screen, comprise inductive component, conductive adhesive layer and flexible circuit board; Described inductive component is above-mentioned touch-screen inductive component; The transparent flexible film substrate surface of described inductive component is divided into visible area and is positioned at the rim area of visible area surrounding; Described conductive adhesive layer be positioned at induction line surface and with induction line conducting, described conductive adhesive layer is positioned at rim area; Described flexible circuit board is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Accompanying drawing explanation
Fig. 1 is in the embodiment of the present invention 1, the cross-sectional view of transparent flexible film substrate;
Fig. 2 is the cross-sectional view of touch-screen in the embodiment of the present invention 1.
Reference numeral in Figure of description is as follows:
1, transparent flexible film substrate; 2, shielding layer; 3, levelling blanket; 4, induction line; 5, conducting resinl; 6, FPC.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Touch-screen inductive component provided by the invention comprises transparent flexible film substrate and is positioned at the induction line on transparent flexible film substrate surface; Described induction line is transparent conductive film, and its thickness is 15-25 μm.
Above-mentioned transparent flexible film substrate, as the carrier of induction line in OPS (One Plastic Solution) touch-screen, needs transparent.Its concrete material can adopt flexible transparent film conventional in prior art, such as, described transparent flexible film substrate is selected from the one in polyethylene terephthalate (PET), polymethylmethacrylate (PMMA), polycarbonate (PC).Preferred employing polyethylene terephthalate (PET) is as transparent flexible film substrate.
For above-mentioned transparent flexible film substrate, its thickness is not particularly limited.As is known in the art, under preferable case, described transparent flexible film substrate thickness is 300-1000 μm.
Usually, touch screen surface is divided into for the visible area of display pattern and the rim area around visible area surrounding.Corresponding, described transparent flexible film substrate surface is divided into visible area and is positioned at the rim area of visible area surrounding.
In the present invention, transparent flexible film substrate surface has induction line, for the induction to the action of user's touch-control.According to the present invention, above-mentioned induction line is transparent conductive film, and its thickness is 15-25 μm.Be different from the thickness of the ITO conductive film 200-300 dust of transmission.
The touch-screen convenient preparation of inductive component of this structure, yields is high.
In the visible area that induction line is distributed in transparent flexible film substrate surface and rim area.As known to those skilled in the art, usually, touch-screen inductive component also comprises shielding layer.Described shielding layer covers described rim area, for blocking the circuit in rim area, promotes the exterior quality of touch-screen.
In the present invention, described shielding layer is between described transparent flexible film substrate and induction line.
As previously mentioned, shielding layer is positioned at the rim area on transparent flexible film substrate surface, causes visible area relative to shielding layer indent, and induction line is covered in shielding layer and surface, transparent flexible film substrate visible area, easily causes induction line open circuit etc. bad.And in the above-mentioned touch-screen inductive component process of preparation, easily produce bubble, cause yields to reduce.
In the present invention, under preferable case, described touch-screen inductive component also comprises levelling blanket, and described levelling blanket is between described transparent flexible film substrate and induction line, and described levelling blanket at least covers described visible area.Can reduce even to eliminate by the levelling blanket at least covering described visible area the difference in height that shielding layer produces, be beneficial to raising yield.
Concrete, under preferable case, described levelling blanket only covers described visible area, and described levelling blanket thickness is identical with described shielding layer thickness.Or described levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
Meanwhile, present invention also offers the preparation method of above-mentioned touch-screen inductive component, comprising:
S1, provide transparent flexible film substrate;
S2, attach in transparent flexible film substrate thickness be 15-25 μm can transfer printing transparent conductive film;
S3, to transparent flexible film substrate can carry out exposure-processed by transfer printing transparent conductive film, then to leave standstill; The method of described exposure-processed is: employing wavelength is 365nm, energy is 30-60mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film;
S4, adopt pH value to be 10.5-11.5 developer solution to development treatment can be carried out by transfer printing transparent conductive film after exposure-processed, obtain conductive pattern;
S5, process is cured to conductive pattern, obtains the induction line that thickness is 15-25 μm; Described solidification processing method is: employing wavelength is 365nm, energy is 500-1000mj/cm
2uV illumination penetrate described conductive pattern.
As previously mentioned, touch-screen inductive component disclosed by the invention is mainly used in OPS (One Plastic Solution) touch-screen, and wherein, induction line is arranged in transparent flexible film substrate.
When preparing above-mentioned touch-screen inductive component, a transparent flexible film substrate first need be provided.Described transparent flexible film substrate is selected from the one in polyethylene terephthalate (PET), polymethylmethacrylate (PMMA), polycarbonate (PC) as previously mentioned.
Preferred employing polyethylene terephthalate (PET) is as transparent flexible film substrate.Described transparent flexible film substrate thickness is preferably 300-1000 μm.In the present invention, qualified transparent flexible film substrate is by being commercially available.
According to the present invention, for ensureing the dimensional stability of transparent flexible film substrate, avoid the change in size of transparent flexible film substrate in following process process and cause the induction line formed to occur the unfavorable conditions such as short circuit, under preferable case, after described step S1 before S2, also comprise shrink step: by described transparent flexible film substrate baking 30-60min at 100-150 DEG C.
Usually, needing to make shielding layer in transparent flexible film substrate, for covering the lead-in wire of touch-screen, improving the exterior quality of touch-screen.
In the present invention, transparent flexible film substrate surface is divided into visible area and is positioned at the rim area of visible area surrounding; In described rim area, there is shielding layer.Above-mentioned shielding layer can adopt existing method to be formed, such as, at the rim area coating black ink on transparent flexible film substrate surface, then by black ink dry solidification.
As previously mentioned, due to the existence of shielding layer, cause the visible area on transparent flexible film substrate surface and surface, rim area not in same level, can transfer printing transparent conductive film if now directly attach, easy generation bubble, and the line of induction Louis prepared produces the bad phenomenon such as open circuit, reduce product yield.
Therefore, under preferable case, be also included in transparent flexible film substrate surface coating UV glue and solidify, forming levelling blanket; Described levelling blanket at least covers described visible area.Reduced the difference in height on rim area and surface, visible area by levelling blanket, be beneficial to raising product yield.More preferably in situation, described levelling blanket only covers described visible area, and described levelling blanket thickness is identical with described shielding layer thickness; Or described levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.Now, then attach can transfer printing transparent conductive film time, can be in a plane by transfer printing transparent conductive film, can effectively reduce bubble and induction line open circuit possibility, be beneficial to raising product yield.
In described step S2, transparent flexible film substrate attaches thickness be 15-25 μm can transfer printing transparent conductive film.Understandable, when transparent flexible film substrate has shielding layer, can be attached on shielding layer by transfer printing transparent conductive film.Equally, when when transparent flexible film substrate has levelling blanket, can be attached on levelling blanket by transfer printing transparent conductive film.
Above-mentioned can transfer printing transparent conductive film be film product known in those skilled in the art.Hitachi changes into silver (Ag) nano wire conductive coating materials " ClearOhm " developed by U.S. Cambrios Technologies and the printed wiring board-use light-sensitive surface technological incorporation that changes into of Hitachi to together, have developed in 2011 based on nano silver wire and photographic layer double-layer structural can transfer printing transparent conductive film.Adopt in the present invention can transfer printing transparent conductive film by being commercially available.
Can be attached in transparent flexible film substrate by transfer printing transparent conductive film by the mode of rolling subsides.Concrete, described in roll subsides condition be: upper roller temperature is 100-140 DEG C, and bottom roller temperature is 80-100 DEG C, and rolling subsides speed is 0.5-1m/min, and roller pressure is 2-5kg/cm
2.
Under preferable case, in described step S3, comprise first exposure-processed 15-25s, then leave standstill 15-30min, then exposure-processed 15-25s.
Transparent flexible film substrate attaches can after transfer printing transparent conductive film, need according to the pattern of the induction line that will be formed, to carrying out exposure-processed by transfer printing transparent conductive film.As known in the art, adopt the mask with corresponding pattern as can transfer printing transparent conductive film surface during exposure, then carry out illumination.In the present invention, the method for described exposure-processed is: employing wavelength is 365nm, energy is 30-60mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film.
In the present invention, to development treatment can be carried out by transfer printing transparent conductive film after above-mentioned exposure-processed, conductive pattern can be obtained.Concrete, in described step S4, developing method is: by can to develop in developer solution 30-50s by transfer printing transparent conductive film after exposure-processed; Described developer solution is 29-31 DEG C, concentration is the sodium carbonate liquor of 0.05-0.15wt%.
Finally above-mentioned conductive pattern solidification can be obtained induction line.As described herein, described solidification processing method is: employing wavelength is 365nm, energy is 500-1000mj/cm
2uV illumination penetrate described conductive pattern.
In addition, present invention also offers a kind of touch-screen, comprise inductive component, conductive adhesive layer and flexible circuit board (FPC); Described inductive component is the touch-screen inductive component that said method prepares; The transparent flexible film substrate surface of described inductive component is divided into visible area and is positioned at the rim area of visible area surrounding; Described conductive adhesive layer be positioned at induction line surface and with induction line conducting, described conductive adhesive layer is positioned at rim area; Described flexible circuit board is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Be existing by the method that above-mentioned inductive component and conductive adhesive layer and flexible circuit board are assembled into touch-screen, such as, at rim area printing silver slurry, then silver slurry dried and can obtain above-mentioned conductive adhesive layer through laser-induced thermal etching again.
Through existing binding processing procedure, flexible circuit board (FPC) is being fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
By the following examples the present invention is further detailed.
Embodiment 1
The present embodiment is for illustration of touch-screen inductive component disclosed by the invention and preparation method thereof, touch-screen.
Thickness is adopted to be that the PET (polyethylene terephthalate) of 300 μm is as transparent flexible film substrate.
Shielding layer is formed in the rim area on transparent flexible film substrate surface.
At rim area and the visible area painting UV glue on transparent flexible film substrate surface, and solidify, form levelling blanket.Levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
Levelling blanket rolls subsides 15 μm thick can transfer printing transparent conductive film.The condition of rolling subsides is: upper roller temperature is 100 DEG C, and bottom roller temperature is 80 DEG C, and rolling subsides speed is 0.5m/min, and roller pressure is 5kg/cm
2.
Then can place there is the mask of conductive pattern in transfer printing transparent conductive film surface, then adopting that wavelength is 365nm, energy is 60mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film.
Adopt 30 DEG C again, concentration be 0.1wt%, pH value be 11 sodium carbonate liquor to after exposure-processed can transfer printing transparent conductive film development treatment 40s.Form conductive pattern.
Then adopt that wavelength is 365nm, energy is 1000mj/cm
2uV illumination penetrate described conductive pattern.Obtain the induction line that thickness is 15 μm.
Obtain touch-screen inductive component.The concrete structure of touch-screen inductive component is see Fig. 1.Concrete, this touch-screen inductive component comprises transparent flexible film substrate 1.Transparent flexible film substrate 1 surface comprises visible area and is positioned at the rim area of visible area surrounding.In the rim area on transparent flexible film substrate 1 surface, there is shielding layer 2.
The surface, visible area on transparent flexible film substrate 1 surface and shielding layer 2 surface are all coated with levelling blanket 3.Levelling blanket 3 surface is a plane.Levelling blanket 3 surface coverage has induction line 4.
Be positioned at the surface printing silver slurry of the part of rim area at induction line, then silver slurry dried again through laser-induced thermal etching, obtain conductive adhesive layer.
By binding processing procedure flexible circuit board (FPC) is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Eventually pass sealing process and can obtain touch-screen.Through detecting touch-screen leaving no air bubbles inside.
The concrete structure of touch-screen is see Fig. 2.Concrete, touch-screen comprises inductive component.Wherein, inductive component is the touch-screen inductive component shown in Fig. 1.Its structure as previously mentioned.
Wherein, induction line 4 surface is provided with conductive adhesive layer 5.Conductive adhesive layer 5 is positioned at rim area, and with induction line 4 conducting.
Conductive adhesive layer 5 is fixedly connected with FPC6.FPC6 and conductive adhesive layer 5 conducting.
Embodiment 2
The present embodiment is for illustration of touch-screen inductive component disclosed by the invention and preparation method thereof.
Thickness is adopted to be that the PET (polyethylene terephthalate) of 1000 μm is as transparent flexible film substrate.By transparent flexible film substrate baking 30min at 150 DEG C.
Shielding layer is formed in the rim area on transparent flexible film substrate surface.
At rim area and the visible area painting UV glue on transparent flexible film substrate surface, and solidify, form levelling blanket.Levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
Levelling blanket rolls subsides 20 μm thick can transfer printing transparent conductive film.The condition of rolling subsides is: upper roller temperature is 140 DEG C, and bottom roller temperature is 100 DEG C, and rolling subsides speed is 1m/min, and roller pressure is 5kg/cm
2.
Then can place there is the mask of conductive pattern in transfer printing transparent conductive film surface, then adopting that wavelength is 365nm, energy is 40mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film 20s, then leave standstill 15min, then exposure-processed 20s.
Adopt 31 DEG C again, concentration be 0.15wt%, pH value be 11 sodium carbonate liquor to after exposure-processed can transfer printing transparent conductive film development treatment 50s.Form conductive pattern.
Then adopt that wavelength is 365nm, energy is 1000mj/cm
2uV illumination penetrate described conductive pattern.Obtain the induction line that thickness is 20 μm.
Be positioned at the surface printing silver slurry of the part of rim area at induction line, then silver slurry dried again through laser-induced thermal etching, obtain conductive adhesive layer.
By binding processing procedure flexible circuit board (FPC) is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Eventually pass sealing process and can obtain touch-screen.Through detecting touch-screen leaving no air bubbles inside.
Embodiment 3
The present embodiment is for illustration of touch-screen inductive component disclosed by the invention and preparation method thereof.
Thickness is adopted to be that the PET (polyethylene terephthalate) of 800 μm is as transparent flexible film substrate.By transparent flexible film substrate baking 30min at 150 DEG C.
Shielding layer is formed in the rim area on transparent flexible film substrate surface.
At rim area and the visible area painting UV glue on transparent flexible film substrate surface, and solidify, form levelling blanket.Levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
Levelling blanket rolls subsides 20 μm thick can transfer printing transparent conductive film.The condition of rolling subsides is: upper roller temperature is 120 DEG C, and bottom roller temperature is 90 DEG C, and rolling subsides speed is 0.8m/min, and roller pressure is 5kg/cm
2.
Then can place there is the mask of conductive pattern in transfer printing transparent conductive film surface, then adopting that wavelength is 365nm, energy is 30mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film 20s, then leave standstill 15min, then exposure-processed 20s.
Adopt 29 DEG C again, concentration be 0.1wt%, pH value be 11.5 sodium carbonate liquor to after exposure-processed can transfer printing transparent conductive film development treatment 30s.Form conductive pattern.
Then adopt that wavelength is 365nm, energy is 1000mj/cm
2uV illumination penetrate described conductive pattern.Obtain the induction line that thickness is 20 μm.
Be positioned at the surface printing silver slurry of the part of rim area at induction line, then silver slurry dried again through laser-induced thermal etching, obtain conductive adhesive layer.
By binding processing procedure flexible circuit board (FPC) is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Eventually pass sealing process and can obtain touch-screen.Through detecting touch-screen leaving no air bubbles inside.
Embodiment 4
The present embodiment is for illustration of touch-screen inductive component disclosed by the invention and preparation method thereof.
Thickness is adopted to be that the PMMA (polymethylmethacrylate) of 1000 μm is as transparent flexible film substrate.By transparent flexible film substrate baking 40min at 130 DEG C.
Shielding layer is formed in the rim area on transparent flexible film substrate surface.
At rim area and the visible area painting UV glue on transparent flexible film substrate surface, and solidify, form levelling blanket.Levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
Levelling blanket rolls subsides 25 μm thick can transfer printing transparent conductive film.The condition of rolling subsides is: upper roller temperature is 110 DEG C, and bottom roller temperature is 85 DEG C, and rolling subsides speed is 0.5m/min, and roller pressure is 3kg/cm
2.
Then can place there is the mask of conductive pattern in transfer printing transparent conductive film surface, then adopting that wavelength is 365nm, energy is 45mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film 25s, then leave standstill 15min, then exposure-processed 25s.
Adopt 30 DEG C again, concentration be 0.05wt%, pH value be 10.5 sodium carbonate liquor to after exposure-processed can transfer printing transparent conductive film development treatment 40s.Form conductive pattern.
Then adopt that wavelength is 365nm, energy is 1000mj/cm
2uV illumination penetrate described conductive pattern.Obtain the induction line that thickness is 25 μm.
Be positioned at the surface printing silver slurry of the part of rim area at induction line, then silver slurry dried again through laser-induced thermal etching, obtain conductive adhesive layer.
By binding processing procedure flexible circuit board (FPC) is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Eventually pass sealing process and can obtain touch-screen.Through detecting touch-screen leaving no air bubbles inside.
Embodiment 5
The present embodiment is for illustration of touch-screen inductive component disclosed by the invention and preparation method thereof.
Thickness is adopted to be that the PC (polycarbonate) of 1000 μm is as transparent flexible film substrate.By transparent flexible film substrate baking 60min at 145 DEG C.
Shielding layer is formed in the rim area on transparent flexible film substrate surface.
Shielding layer and visible area roll on the surface subsides 25 μm thick can transfer printing transparent conductive film.The condition of rolling subsides is: upper roller temperature is 130 DEG C, and bottom roller temperature is 95 DEG C, and rolling subsides speed is 0.9m/min, and roller pressure is 5kg/cm
2.
Then can place there is the mask of conductive pattern in transfer printing transparent conductive film surface, then adopting that wavelength is 365nm, energy is 60mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film 25s, then leave standstill 15min, then exposure-processed 25s.
Adopt 30 DEG C again, concentration be 0.1wt%, pH value be 11 sodium carbonate liquor to after exposure-processed can transfer printing transparent conductive film development treatment 40s.Form conductive pattern.
Then adopt that wavelength is 365nm, energy is 1000mj/cm
2uV illumination penetrate described conductive pattern.Obtain the induction line that thickness is 25 μm.
Be positioned at the surface printing silver slurry of the part of rim area at induction line, then silver slurry dried again through laser-induced thermal etching, obtain conductive adhesive layer.
By binding processing procedure flexible circuit board (FPC) is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
Eventually pass sealing process and can obtain touch-screen.A small amount of bubble is there is through detecting touch-screen inside.
Touch-screen inductive component preparation technology provided by the invention is simple, and yield is high, cost is low.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a touch-screen inductive component, is characterized in that, comprises transparent flexible film substrate and is positioned at the induction line on transparent flexible film substrate surface; Described induction line is transparent conductive film, and its thickness is 15-25 μm.
2. touch-screen inductive component according to claim 1, is characterized in that, described transparent flexible film substrate surface is divided into visible area and is positioned at the rim area of visible area surrounding;
Described touch-screen inductive component also comprises shielding layer, and described shielding layer covers described rim area, and described shielding layer is between described transparent flexible film substrate and induction line.
3. touch-screen inductive component according to claim 2, it is characterized in that, described touch-screen inductive component also comprises levelling blanket, and described levelling blanket is between described transparent flexible film substrate and induction line, and described levelling blanket at least covers described visible area.
4. touch-screen inductive component according to claim 3, is characterized in that, described levelling blanket only covers described visible area, and described levelling blanket thickness is identical with described shielding layer thickness.
5. touch-screen inductive component according to claim 3, is characterized in that, described levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
6. according to the preparation method in claim 1-5 described in any one, it is characterized in that, described transparent flexible film substrate is selected from the one in polyethylene terephthalate, polymethylmethacrylate, polycarbonate; Described transparent flexible film substrate thickness is 300-1000 μm.
7. the preparation method of touch-screen inductive component as claimed in claim 1, is characterized in that, comprising:
S1, provide transparent flexible film substrate;
S2, attach in transparent flexible film substrate thickness be 15-25 μm can transfer printing transparent conductive film;
S3, to transparent flexible film substrate can carry out exposure-processed by transfer printing transparent conductive film, then to leave standstill; The method of described exposure-processed is: employing wavelength is 365nm, energy is 30-60mj/cm
2uV illumination penetrate described can transfer printing transparent conductive film;
S4, adopt pH value to be 10.5-11.5 developer solution to development treatment can be carried out by transfer printing transparent conductive film after exposure-processed, obtain conductive pattern;
S5, process is cured to conductive pattern, obtains the induction line that thickness is 15-25 μm; Described solidification processing method is: employing wavelength is 365nm, energy is 500-1000mj/cm
2uV illumination penetrate described conductive pattern.
8. preparation method according to claim 7, is characterized in that, after described step S1 before S2, also comprises shrink step: by described transparent flexible film substrate baking 30-60min at 100-150 DEG C.
9. the preparation method according to claim 7 or 8, is characterized in that, in described step S2, being attached in transparent flexible film substrate by the mode of rolling subsides can transfer printing transparent conductive film;
Described condition of rolling subsides is: upper roller temperature is 100-140 DEG C, and bottom roller temperature is 80-100 DEG C, and rolling subsides speed is 0.5-1m/min, and roller pressure is 2-5kg/cm
2.
10. preparation method according to claim 9, is characterized in that, in described step S3, comprises first exposure-processed 15-25s, then leaves standstill 15-30min, then exposure-processed 15-25s.
11., according to the preparation method in claim 7,8,10 described in any one, is characterized in that, in described step S4, developing method is: by can to develop in developer solution 30-50s by transfer printing transparent conductive film after exposure-processed; The sodium carbonate liquor of the 0.05-0.15wt% that described developer solution is 29-31 DEG C, concentration is.
12. preparation methods according to claim 7, is characterized in that, in described step S1, transparent flexible film substrate surface is divided into visible area and is positioned at the rim area of visible area surrounding; In described rim area, there is shielding layer.
13. preparation methods according to claim 12, is characterized in that, are also included in transparent flexible film substrate surface coating UV glue and solidify, form levelling blanket after described step S1 before step S2; Described levelling blanket at least covers described visible area.
14. preparation methods according to claim 13, is characterized in that, described levelling blanket only covers described visible area, and described levelling blanket thickness is identical with described shielding layer thickness;
Or described levelling blanket covers described visible area and shielding layer simultaneously, and described levelling blanket surface is plane.
15. according to claim 7,8,10, preparation method in 12-14 described in any one, it is characterized in that, described transparent flexible film substrate is selected from the one in polyethylene terephthalate, polymethylmethacrylate, polycarbonate; Described transparent flexible film substrate thickness is 300-1000 μm.
16. 1 kinds of touch-screens, is characterized in that, comprise inductive component, conductive adhesive layer and flexible circuit board;
The touch-screen inductive component that described inductive component prepares for the method in claim 7-15 described in any one;
The transparent flexible film substrate surface of described inductive component is divided into visible area and is positioned at the rim area of visible area surrounding;
Described conductive adhesive layer be positioned at induction line surface and with induction line conducting, described conductive adhesive layer is positioned at rim area;
Described flexible circuit board is fixed on conductive adhesive layer surface, and with conductive adhesive layer conducting.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105389067A (en) * | 2015-11-27 | 2016-03-09 | 深圳市骏达光电股份有限公司 | Capacitive touch screen with fingerprint recognition function and manufacturing method |
| CN107015705A (en) * | 2017-05-19 | 2017-08-04 | 信利光电股份有限公司 | A kind of touch control display apparatus, contact panel and preparation method thereof |
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