CN109545434A - Transparent conductive film, touch screen and preparation method thereof - Google Patents
Transparent conductive film, touch screen and preparation method thereof Download PDFInfo
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- CN109545434A CN109545434A CN201710863035.1A CN201710863035A CN109545434A CN 109545434 A CN109545434 A CN 109545434A CN 201710863035 A CN201710863035 A CN 201710863035A CN 109545434 A CN109545434 A CN 109545434A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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Abstract
The invention relates to a transparent conductive film, which comprises a first hard coating, a first transparent conductive layer and a first metal layer which are sequentially formed on a first surface of a substrate, and a second hard coating, a second transparent conductive layer and a second metal layer which are sequentially formed on a second surface of the substrate. The first hard coating layer and/or the second hard coating layer contain a plurality of suspended particles. The suspended particles form a plurality of protrusions on the surface of the first metal layer and/or the second metal layer. Therefore, when the transparent conductive film is curled, the plurality of protrusions can make two adjacent metal layers form point contact, thereby preventing the two metal layers from being adhered to each other. Furthermore, the suspended particles are separated from the substrate, which is equivalent to being suspended in the first hard coating layer and/or the second hard coating layer, so that the suspended particles do not directly contact the surface of the substrate. Therefore, even if the surface of the suspended particles has an irregular protruding structure, the substrate is not damaged. In addition, the invention also provides a touch screen and a preparation method thereof.
Description
Technical field
The present invention relates to capacitance type touch control screen technical field, in particular to a kind of transparent conducting film, touch screen and its
Preparation method.
Background technique
Transparent conducting film is the core element of capacitance type touch control screen.With the rapid development of intelligent terminals, to transparent
The demand of conductive membrane is also increasingly to increase.Transparent conducting film generally comprises substrate and is set to the hard of substrate two sides
Coating, conductive layer and metal layer.Currently, having two-fold since amorphism thin polymer film is compared with crystalline polymer film
Penetrate the less and uniform advantage of rate, therefore the substrate that most of transparent conductive film is formed using armorphous polymer thin film.
Amorphism thin polymer film is more fragile than crystalline polymer film, and surface is easier to be damaged.It is crimping
When transparent conducting film makes its tubular, the metal layer that can have adjacent transparent conductive film generates adhesion and crimping each other
The problem of.Therefore, occur adding particle in hard conating, so that layer on surface of metal forms the transparent conducting film of protrusion.
Protrusion can make adjacent metal layer form point contact, to avoid sticking together and crimp.
However, the partial size of particle is typically small (micron order), and gone back at present for the process for treating surface of micron particles
It is immature.Therefore, the surface of particle can have various unpredictable corner angle, spine and other protrusion structures.These protrude knot
Structure is directly contacted with substrate, and when the curling of bright conductive membrane, prominent structure can be made to apply a pressure to substrate, to damage
Hurt substrate.
Summary of the invention
Based on this, it is necessary to be easy to cause asking for substrate damage in curly course for existing transparent conducting film
Topic provides a kind of transparent conducting film that can effectively prevent substrate damage, touch screen and preparation method thereof.
A kind of transparent conducting film, comprising:
Substrate, including the first surface and second surface being oppositely arranged；
It is sequentially formed in the first hard conating, the first transparency conducting layer and the first metal layer of the first surface；
It is sequentially formed in the second hard conating, the second transparency conducting layer and second metal layer of the second surface；
First hard conating and/or second hard conating contain multiple suspended particulates, in the first metal layer
And/or the surface of the second metal layer forms multiple protrusions, deposits between the multiple suspended particulate and the surface of the substrate
It is being spaced.
Due to there is interval between suspended particulate and substrate, it is equivalent to and is suspended in the first hard conating and/or the second hard conating
It is interior, therefore suspended particulate will not directly be contacted with the surface of substrate.Therefore, even if there are irregular protrusions on the surface of suspended particulate
Structure will not cause to damage to substrate.
The material of the suspended particulate and first hard conating and second hard conating in one of the embodiments,
It is identical.
That is, the optical parameter of suspended particulate and the first hard conating and the second hard conating (being collectively referred to as hard conating below)
It is identical.Therefore, in the linkage interface of suspended particulate and hard conating, light propagates impacted smaller, suspended particulate and hard conating
Closer is an entirety.When light passes through the hard conating containing suspended particulate, the distortion that round generates is smaller.Cause
This, transparent conducting film is achieving the purpose that resist blocking and that, resistance to compression connect simultaneously, moreover it is possible to avoid its optical property by unfavorable shadow
It rings.
The material of the suspended particulate is silica, organosilicon polymer, acrylic compounds in one of the embodiments,
Polymer or styrene polymer.
The above material has the advantage that translucency is good, is easily obtained, can be before meeting performance requirement for suspended particulate
Putting reduces cost.
In one of the embodiments, along perpendicular to the first metal layer and/or the second metal layer surface
On direction, the height of the multiple protrusion is 0.1~0.5 μm.
The height of protrusion is higher, then resist blocking and that effect is better.But with the raising of height, the size phase of suspended particulate
It in requisition for increase, can also be increased with it so as to cause the haze value of transparent conducting film, and will be tight after reaching a certain level
Ghost image rings the optical effect of transparent conducting film.And in above-mentioned altitude range, transparent conducting film can preferably be taken into account
Resist blocking and that and optical effect.
The suspended particulate is spherical in shape in one of the embodiments, and the partial size of the suspended particulate is less than described the
The thickness of the flat site of one hard conating and/or second hard conating, the flat site are first hard conating or institute
State the region that the second hard conating is not provided with the suspended particulate.
In the conductive film of existing resist blocking and that, the partial size of particle must be greater than the thickness of hard conating, otherwise can not be in metal
The surface of layer forms protrusion.Therefore, the particle size of particle is limited to the thickness of hard conating, can not further reduce.However,
Grain partial size is bigger, then the haze value of conductive film increases, light transmission rate reduces, and then influences the optical effect of conductive film.
In the present embodiment, since suspended particulate is suspended in the first hard conating and/or the second hard conating.Therefore, even if
The partial size of suspended particulate be less than hard conating thickness, nor affect on its formed on the surface of the first metal layer or second metal layer it is convex
It rises.That is, the partial size of suspended particulate is not limited by hard coat layer thickness, the partial size of suspended particulate is relative to existing resist blocking and that
The partial size of particle can further reduce in conductive film, to reduce haze value, promote light transmission rate, finally improve optical effect.
In one of the embodiments, the flat site with a thickness of 0.5~3 μm, the suspended particulate and the base
Distance is the 1/4 to 1/2 of the flat site thickness between material surface.
Distance between suspended particulate and substrate surface indicates that suspended particulate is embedded in the first hard conating and/or the second hard conating
Depth.Within this range, the fastness of suspended particulate attachment can be increased while guaranteeing height of projection.
The substrate is polycyclic alkene or polycarbonate or polyethylene terephthalate in one of the embodiments,
Film.
The two kinds of film can meet the requirement to the birefringence and its deviation of substrate, and convenient for obtaining.Cause
This, can advantageously reduce the cost of transparent conducting film.
The distribution density of the protrusion is 100~3000/mm in one of the embodiments,2。
When the distribution density of protrusion is excessive, the haze value that will lead to transparent conducting film is excessive, light transmission rate reduces, into
And seriously affect the appearance and optical effect of transparent conducting film.And if the distribution density of protrusion is too small, resist blocking and that
Effect is limited.In above-mentioned roughness and density range, transparent conducting film can preferably take into account resist blocking and that and optical effect.
A kind of touch screen, touch screen transparent conducting film as described in any one of above preferred embodiment are made
At the touch screen includes Touch Zone and lead district, and the first metal layer and the second metal layer are located at the lead district；
The Touch Zone include as first transparency conducting layer etching made of first electrode and by the second transparency conducting layer etching and
At second electrode；The lead district includes by the first metal layer and positioned at the first transparency conducting layer quilt of the lead district
The first lead formed is etched, and is etched shape by the second metal layer and positioned at the second transparency conducting layer of the lead district
At the second lead.
In above-mentioned touch screen, by the first metal layer, second metal layer, the first transparency conducting layer and the second transparency conducting layer
Directly etching obtains first lead and the second lead.It is therefore not necessary to be formed and first electrode and the second electricity by silk-screen mode again
The lead of pole electrical connection.Compared with traditional touch screen, due to being not necessarily to silk-screen, the contact conductor directly formed by yellow light process
Width can further reduce, therefore touch screen has narrow frame.
A kind of preparation method of touch screen, comprising steps of
A kind of transparent conducting film as described in any one of above preferred embodiment is provided；
The first metal layer and the second metal layer are etched, to expose the first transparency conducting layer and second of Touch Zone
Transparency conducting layer, and form the metal lead wire pattern for being located at lead district；
First transparency conducting layer and second transparency conducting layer are etched, to form the first electrode for being located at Touch Zone
And second electrode, and form the transparent lead pattern for being located at lead district, the metal lead wire pattern and the transparent lead pattern
Collectively form contact conductor.
Using the above method when preparing touch screen, directly to the first metal layer, second metal layer, the first transparency conducting layer
And second transparency conducting layer be etched, first electrode, second electrode can be obtained and be electrically connected with first electrode, second electrode
Contact conductor.It is therefore not necessary to lead be formed using silk-screen mode again, to effectively simplify technique, improve processing effect
Rate.Moreover, there is narrow frame by touch screen prepared by the above method.
Detailed description of the invention
Fig. 1 is the stepped construction schematic diagram of transparent conducting film in present pre-ferred embodiments；
Fig. 2 is the enlarged drawing of the local A of transparent conducting film shown in Fig. 1；
Fig. 3 is the stepped construction schematic diagram of transparent conducting film in another embodiment of the present invention；
Fig. 4 is the stepped construction schematic diagram of touch screen in present pre-ferred embodiments；
Fig. 5 is the flow diagram of touch screen preparation method in present pre-ferred embodiments.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more saturating
It is thorough comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Fig. 1 and Fig. 2 is please referred to, the transparent conducting film 10 in present pre-ferred embodiments includes that substrate 11, first is hard
Coating 12, the first transparency conducting layer 13, the first metal layer 14, the second hard conating 22, the second transparency conducting layer 23 and the second metal
Layer 24.
Substrate 11 includes the first surface (upper surface shown in Fig. 1) and second surface (lower surface shown in Fig. 1) being oppositely arranged.
Substrate 11 is formed by amorphism thin polymer film.Since amorphism thin polymer film is smaller simultaneously than crystalline polymer film birefringence
And uniformly, the uneven color in transparent conducting film 10 of the invention can be eliminated.For amorphism polymer of the invention
Birefringence in the face of film is preferably 0~0.001, and further preferably 0~0.0005.It is poly- for amorphism of the invention
The deviation for closing the birefringence in the face of object film is preferably 0.0005 hereinafter, further preferably 0.0003 or less.
Aforementioned birefringence and its deviation can be by selecting the amorphism thin polymer film of suitable type to reach.Specifically
In the present embodiment, substrate 11 is polycyclic alkene or polycarbonate or pet film.The two types
Film can meet the requirement of birefringence and its deviation.The substrate 11 formed by amorphism thin polymer film with a thickness of 20 μm
~200 μm.
First hard conating 12, the first transparency conducting layer 13 and the first metal layer 14 are sequentially formed in the first table of substrate 11
Face.Second hard conating 22, the second transparency conducting layer 23 and second metal layer 24 are sequentially formed in the second surface of substrate 11.Its
In:
First hard conating 12 plays a protective role to the first surface of substrate 11.First hard conating 12 includes binder tree
Rouge.The binder resin is including, for example, the hardening resin composition based on ultraviolet light, electron ray.Hardening resin composition
It preferably comprises glycidyl acrylate based polymer and acrylic acid carries out polymer obtained from addition reaction.Alternatively, solidification
Property resin combination preferably comprises polyfunctional acrylic ester polymer (pentaerythrite, dipentaerythritol etc.).Curable resin group
Closing object also includes polymerization initiator.
First transparency conducting layer 13 is formed in the surface of the first hard conating 12.First transparency conducting layer 13 is by visible region
Sheet resistance value (the unit: Ω/m of transmissivity height (80% or more) and per unit area in domain (380nm~780nm)2) be
500Ω/m2Layer below is formed.Preferred 15nm~the 100nm of thickness of first transparency conducting layer 13, more preferably 15nm~
50nm.First transparency conducting layer 13 is for example by indium tin oxide (ITO) or any shape of indium oxide-zinc oxide composites
At.
The first metal layer 14 is formed on the surface of the first transparency conducting layer 13.The first metal layer 14 is of the invention transparent
When conductive membrane is used for such as touch panel, it is routed for being formed in the outside of touch input area.About forming the first gold medal
Belong to the material of layer 15, representational is copper, silver, it is possible to use the arbitrary metal of excellent electric conductivity in addition to this.First
The thickness of metal layer 14 is preferably 50nm~500nm, more preferably 100nm~300nm.
Further, the second hard conating 22, the second transparency conducting layer 23 and second metal layer 24 respectively with the first hard conating
12, the film layer structure of the first transparency conducting layer 13 and the first metal layer 14, function and material composition are identical, therefore no longer superfluous herein
It states.
In addition, the first hard conating 12 and/or the second hard conating 22 contain multiple suspended particulates 15, in the first metal layer 14
And/or the surface of second metal layer 24 forms multiple raised 16.Moreover, being deposited between multiple suspended particulates 15 and the surface of substrate 11
It is being spaced.
Specifically, suspended particulate 15 can irregularly, first can also be distributed in preset rules (as equably) hard apply
In layer 12 and/or the second hard conating 22.Suspended particulate 15 can be spheric granules, can also be unsetting particle.Suspended particulate 15
It is in suspended state in the first hard conating 12 and/or the second hard conating 22, therefore is not contacted directly with substrate 11.
Suspended particulate 15 can be only contained in the first hard conating 12 or the second hard conating 22, thus obtain single side be formed with it is convex
Play 16 transparent conducting film 10；Suspended particulate 15 can also be contained in the first hard conating 12, also be contained in the second hard painting
In layer 22, to obtain the two-sided transparent conducting film 10 for being formed with protrusion 16.
It is illustrated by taking the first hard conating 12 as an example:
Suspended particulate 15 protrudes from the surface of the first hard conating 12, so that the surface of the first hard conating 12 be made to form evagination
Region, and the region that the first hard conating 12 is not provided with suspended particulate 15 then forms flat site 17.Due to the first transparency conducting layer
13 and the surface that is cascading with the first hard conating 12 of the first metal layer 14, therefore the surface shape of the two and the first hard conating
12 surface shape is identical.Therefore, in the region corresponding with suspended particulate 14 of the first metal layer 14, multiple raised 16 be will form.
Similarly, when containing suspended particulate 15 in the second hard conating 22, the surface of second metal layer 24 can also form multiple convex
Play 16.
In the transparent conductive film 10 using roll-to-roll process (roll to roll process) to manufacture strip, by
The surface of the first metal layer 14 and/or second metal layer 24 is set to form multiple raised 16 in suspended particulate 15.Therefore, saturating in curling
When bright conductive membrane 10, multiple raised 16 can make to form point contact between two neighboring metal layer, to prevent it mutually viscous
Even, crimping.
It is suspended in the first hard conating 12 and/or the second hard conating 22 moreover, because suspended particulate 15 is equivalent to, with base
There is interval between the surface of material 11, therefore suspended particulate 15 will not directly be contacted with the surface of substrate 11.Therefore, even if suspension
There are irregular prominent structures on the surface of grain 15, will not cause to damage to substrate 11.
In the present embodiment, contain suspended particulate 15 in the first hard conating 12 and the second hard conating 22, so that the first gold medal
The surface for belonging to layer 14 and second metal layer 24 is each formed with multiple raised 16.
That is, the two-sided of obtained transparent conducting film 10 is each formed with multiple raised 16.Therefore, it is crimping
When transparent conducting film 10, the point of point contact increases between two adjacent metal layers, therefore the effect that its resist blocking and that, resistance to compression connect
Fruit is more preferable.
Referring to Fig. 3, in another embodiment, any of the first hard conating 12 and the second hard conating 22 contain suspension
Particle 15, so that the surface of the first metal layer 14 or second metal layer 24 is formed with multiple raised 16.
That is, only single side is formed with multiple raised 16 to obtained transparent conducting film 10.Therefore, play it is anti-
While adhesion, resistance to compression connect effect, moreover it is possible to avoid the shade of two layers of suspended particulate 15 from being overlapped mutually, to mitigate mist degree, to mention
Rise the optical effect of transparent conducting film 10.
In the present embodiment, suspended particulate 15 is identical as the material of the first hard conating 12 and the second hard conating 22.
Since suspended particulate 15 is identical as the material of the first hard conating 12 and the second hard conating 22 (being collectively referred to as hard conating below),
Therefore its optical parameter is also identical.Therefore, in the linkage interface of suspended particulate 15 and hard conating, light propagation institute is impacted smaller,
Suspended particulate 15 and hard conating are closer for an entirety.When light passes through the first hard conating 12 containing suspended particulate 15 and the
When two hard conatings 22, the distortion that round generates is smaller.Therefore, transparent conducting film 10 is reaching resist blocking and that, resistance to compression
The purpose connect is simultaneously, moreover it is possible to its optical property be avoided to be adversely affected.
Further, in the present embodiment, the material of suspended particulate 15 is silica, organosilicon polymer, acrylic acid
Quasi polymer or styrene polymer.
The above material has the advantage that translucency is good, is easily obtained, and can meet performance requirement for suspended particulate 15
Under the premise of reduce cost.Certainly, other suitable materials can also be selected according to actual performance and cost needs.
In the present embodiment, suspended particulate 15 is spherical in shape, and the partial size of suspended particulate 15 less than the first hard conating 12 and/or
The thickness of the flat site 17 of second hard conating 22.
In the conductive film of existing resist blocking and that, the partial size of particle must be greater than the thickness of hard conating, otherwise can not be in metal
The surface of layer forms protrusion.Therefore, the particle size of particle is limited to the thickness of hard conating, can not further reduce.However,
Grain partial size is bigger, then the haze value of conductive film increases, light transmission rate reduces, and then influences the optical effect of conductive film.
In the present invention, suspended particulate 15 is suspended in the first hard conating 12 and/or the second hard conating 22.Therefore, even if
The partial size of suspended particulate 15 is less than the thickness of hard conating, nor affects on it on the first metal layer 14 or the surface of second metal layer 24
Form protrusion 16.That is, the partial size of suspended particulate 15 is not limited by hard coat layer thickness, the partial size of suspended particulate 15 is opposite
The partial size of particle can further reduce in existing resist blocking and that conductive film, to reduce haze value, promote light transmission rate, finally change
Kind optical effect.
It is appreciated that in other embodiments, suspended particulate 15 can also be aspherical particle.At this point, suspended particulate 15 exists
Perpendicular to the size on the direction on 11 surface of substrate, less than the thickness of flat site 17.
Further, in the present embodiment, flat site 17 with a thickness of 0.5~3 μm, suspended particulate 15 and 11 table of substrate
Distance is the 1/4 to 1/2 of 17 thickness of flat site between face.
Distance between 11 surface of suspended particulate 15 and substrate indicates that suspended particulate 15 is embedded in the first hard conating 12 and/or the
The depth of two hard conatings 22.Specifically, the insert depth of suspended particulate 15 is the 1/2 to 3/4 of 17 thickness of flat site.
Within this range, the fastness that suspended particulate 15 adheres to can be increased while guaranteeing raised 16 height.It needs to refer to
Out, in actual production, due to being difficult to accurately control each suspended particulate 15, therefore what is be difficult to avoid that has pole
Small part suspended particulate 15 is located at outside above range at a distance from 11 surface of substrate.But produced by the partial suspended particle 15
Influence it is negligible.
In order to realize that more preferably resist blocking and that and resistance to compression connect effect, has for the concentration of protrusion 16 and want accordingly
It asks.
In the present embodiment, the distribution density of protrusion 16 is 100~3000/mm2。
When the distribution density of protrusion 16 is excessive, the haze value that will lead to transparent conducting film 10 is excessive, light transmission rate drop
It is low, and then seriously affect the appearance and optical effect of transparent conducting film 10.And if the distribution density of protrusion 16 is too small,
The effect of resist blocking and that is limited.In above-mentioned roughness and density range, transparent conducting film 10 can preferably take into account resist blocking and that
And optical effect.
Wherein, the distribution density of protrusion 16 can change by adjusting 15 shape of suspended particulate, size and content.
Further, in the present embodiment, along the side perpendicular to 24 surface of the first metal layer 14 and/or second metal layer
Upwards, multiple raised 16 height are 0.1~0.5 μm.
The height of protrusion 16 refers to that protrusion 16 protrudes from the height on 24 surface of the first metal layer 14 and/or second metal layer
Degree.Since 15 size of suspended particulate is smaller, therefore it is difficult to be accurately controlled each raised 16 height.It therefore, will be raised
16 height controls in above-mentioned altitude range.It should be pointed out that in actual production, due to being difficult to each suspension
The progress of particle 15 accurately controls, therefore the height for having few partial suspended particle 15 and being formed by protrusion 16 being difficult to avoid that
Outside above range.But it is influenced caused by part protrusion 16 negligible.
Under normal circumstances, the height of protrusion 16 is higher, then resist blocking and that effect is better.But it with the raising of height, hangs
The size of floating particles 15 can also increase with it, and reach mutually in requisition for increase so as to cause the haze value of transparent conducting film 10
The optical effect of transparent conducting film 10 will be seriously affected after to a certain extent.And in above-mentioned altitude range, it is transparent to lead
Electric thin film 10 can preferably take into account resist blocking and that and optical effect.
Wherein, the height of protrusion 16 can change by adjusting 15 size of suspended particulate and the suspension degree of suspended particulate 15
Become.
Above-mentioned transparent conducting film 10, suspended particulate 15 make the surface of the first metal layer 14 and/or second metal layer 24
Form multiple raised 16.Therefore, when crimping above-mentioned transparent conducting film 10, multiple raised 16 can make two neighboring metal layer
Between form point contact, to prevent its stick to each other.Moreover, there is interval between suspended particulate 15 and the surface of substrate 11,
It is equivalent to and is suspended in the first hard conating 12 and/or the second hard conating 22, therefore suspended particulate 15 will not be straight with the surface of substrate 11
Contact.Therefore, even if there are irregular prominent structures on the surface of suspended particulate 15, substrate 11 will not be caused to damage.
In addition, the present invention also provides a kind of touch screens.Referring to Figure 4 together, the touch screen in present pre-ferred embodiments
200 as made by the transparent conducting film 1 in above-described embodiment.Wherein:
Touch screen 200 includes Touch Zone 210 and lead district 220.Specifically, Touch Zone 210 is located in touch screen 200
Portion, and lead district 220 is then around the circumferential setting of Touch Zone 210.The first metal layer 14 and second metal layer 24 are located at lead district
220。
Touch Zone 210 includes first electrode 211 and second electrode 212.Wherein, first electrode 211 is by the first electrically conducting transparent
Layer 13 etches；Second electrode 212 is etched by the second transparency conducting layer 23.First electrode 211 and second electrode 212 are lost
It is carved into electrode pattern.Specifically, electrode pattern is general elongated and the first electrode 211 that intersects vertically grid-shaped, opposite
And second electrode 212 forms the two poles of the earth of capacitance structure.
Lead district 220 includes first lead 221 and the second lead 222.First lead 221 is by the first metal layer 14 and is located at
First transparency conducting layer 13 of lead district 220 is etched to form；Second lead 222 then by second metal layer 24 and is located at lead district
220 the second transparency conducting layer 23 is etched to form.First lead 221 and the second lead 222 are double-layer structure, thus realize with
First electrode 211 and second electrode 212 are electrically connected.
It is transparent by the first metal layer 14, second metal layer 24, the first transparency conducting layer 13 and second in above-mentioned touch screen
The directly etching of conductive layer 23 obtains first lead 221 and the second lead 222.Therefore, because silk-screen is not necessarily to, directly by yellow light process
The width of the contact conductor of formation can further reduce, therefore touch screen has narrow frame.
Please refer to fig. 5, the present invention also provides a kind of preparation method of touch screen, the method comprising the steps of S310~
S330:
Step S310: a kind of transparent conducting film is provided.
Specifically, transparent conducting film is the transparent conducting film 10 in above-described embodiment comprising stacking is set
The first transparency conducting layer 13 and the first metal layer 14 set, and the second transparency conducting layer 23 and second metal layer that are stacked
24。
Step S320: etching the first metal layer 14 and second metal layer 24, to expose the first transparency conducting layer of Touch Zone
13 and second transparency conducting layer 23, and form the metal lead wire pattern for being located at lead district
Specifically, metal lead wire pattern can be formed in layer on surface of metal by one of yellow light process.Wherein, metal lead wire figure
Case is arranged along the edge of touch screen.After being etched to metal layer, the first transparency conducting layer 13 of lower layer and second transparent lead
24 part of electric layer is exposed.
Step S330 etches the first transparency conducting layer 13 and the second transparency conducting layer 23, to form be located at Touch Zone the
One electrode 211 and second electrode 212, and form the transparent lead pattern for being located at lead district, metal lead wire pattern and transparent lead
Pattern collectively forms contact conductor.
Specifically, the first transparency conducting layer 13 and the second transparency conducting layer 24 are exposed using another road yellow light process
Part be etched, to form electrode pattern, so that first electrode 211 and second electrode 212 can be obtained.Meanwhile in gold
Belong to lead pattern the first metal layer 14 and second metal layer 24 respectively with the first transparency conducting layer 13 and second in lead district
Transparency conducting layer 23 is superimposed, to form the first lead 221 and the second lead 222 of double-layer structure.First lead 221 and second
Lead 222 is electrically connected with first electrode 211 and the realization of second electrode 212 respectively.
Using the above method when preparing touch screen, directly to the first metal layer 14, second metal layer 24, first is transparent leads
Electric layer 13 and the second transparency conducting layer 23 are etched, and can obtain first electrode 211, second electrode 212 and and first electrode
211, the first lead 221 of the electrical connection of second electrode 212, the second lead 222.Draw it is therefore not necessary to be formed again using silk-screen mode
Line, to effectively simplify technique, improve processing efficiency.Moreover, there is narrow side by touch screen prepared by the above method
Frame.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of transparent conducting film, comprising:
Substrate, including the first surface and second surface being oppositely arranged；
It is sequentially formed in the first hard conating, the first transparency conducting layer and the first metal layer of the first surface；
It is sequentially formed in the second hard conating, the second transparency conducting layer and second metal layer of the second surface；
It is characterized in that, first hard conating and/or second hard conating contain multiple suspended particulates, described first
The surface of metal layer and/or the second metal layer forms multiple protrusions, the surface of the multiple suspended particulate and the substrate
Between exist interval.
2. transparent conducting film according to claim 1, which is characterized in that the suspended particulate and the described first hard painting
The material of layer and second hard conating is identical.
3. transparent conducting film according to claim 2, which is characterized in that the material of the suspended particulate is titanium dioxide
Silicon, organosilicon polymer, acrylic polymer or styrene polymer.
4. transparent conducting film according to claim 1, which is characterized in that along perpendicular to the first metal layer
And/or on the direction on the second metal layer surface, the height of the multiple protrusion is 0.1~0.5 μm.
5. transparent conducting film according to any one of claims 1 to 4, which is characterized in that the suspended particulate is in ball
Shape, and the partial size of the suspended particulate is less than the thickness of the flat site of first hard conating and/or second hard conating,
The flat site is the region that first hard conating or second hard conating are not provided with the suspended particulate.
6. transparent conducting film according to claim 5, which is characterized in that the flat site with a thickness of 0.5~3
μm, distance is the 1/4 to 1/2 of the flat site thickness between the suspended particulate and the substrate surface.
7. transparent conducting film according to claim 1, which is characterized in that the substrate is polycyclic alkene or poly- carbonic acid
Ester or pet film.
8. transparent conducting film according to claim 1, which is characterized in that the distribution density of the protrusion be 100~
3000/mm2。
9. a kind of touch screen, which is characterized in that the touch screen is by the described in any item electrically conducting transparents of the claims 1 to 8
Made by property film, the touch screen includes Touch Zone and lead district, and the first metal layer and the second metal layer are located at
The lead district；The Touch Zone include as first transparency conducting layer etching made of first electrode and by second it is transparent
Second electrode made of Conductive Layer Etch；The lead district includes by the first metal layer and positioned at the first of the lead district
The first lead that transparency conducting layer is etched to form, and transparent led by the second metal layer and positioned at the second of the lead district
The second lead that electric layer is etched to form.
10. a kind of preparation method of touch screen, which is characterized in that comprising steps of
It provides a kind of such as the described in any item transparent conducting films of the claims 1 to 8；
The first metal layer and the second metal layer are etched, to expose the first transparency conducting layer of Touch Zone and second transparent
Conductive layer, and form the metal lead wire pattern for being located at lead district；
First transparency conducting layer and second transparency conducting layer are etched, to form the first electrode and for being located at Touch Zone
Two electrodes, and the transparent lead pattern for being located at lead district is formed, the metal lead wire pattern and the transparent lead pattern are common
Constitute contact conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710863035.1A CN109545434A (en) | 2017-09-22 | 2017-09-22 | Transparent conductive film, touch screen and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710863035.1A CN109545434A (en) | 2017-09-22 | 2017-09-22 | Transparent conductive film, touch screen and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109545434A true CN109545434A (en) | 2019-03-29 |
Family
ID=65828473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710863035.1A Pending CN109545434A (en) | 2017-09-22 | 2017-09-22 | Transparent conductive film, touch screen and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109545434A (en) |
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2017
- 2017-09-22 CN CN201710863035.1A patent/CN109545434A/en active Pending
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