CN208766632U - Capacitive touch screen functional sheet and capacitive touch screen and electronic device - Google Patents
Capacitive touch screen functional sheet and capacitive touch screen and electronic device Download PDFInfo
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- CN208766632U CN208766632U CN201820926890.2U CN201820926890U CN208766632U CN 208766632 U CN208766632 U CN 208766632U CN 201820926890 U CN201820926890 U CN 201820926890U CN 208766632 U CN208766632 U CN 208766632U
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Abstract
The utility model discloses a kind of capacitive touch screen functional sheets; including substrate, capacitive sensing layer, capacitive sensing layer protective layer, conductive electrode layers, wear-resistant conductive layer, disappear shadow protective layer and OCA optical cement adhesive layer; the conductive electrode layers include conducting electrode ontology and the conducting electrode lead that extends outward from conducting electrode ontology, and the capacitive sensing layer, capacitive sensing layer protective layer disappear shadow protective layer and OCA optical cement adhesive layer is transparent.The invention also discloses a kind of capacitive touch screens and a kind of electronic device.The utility model capacitive touch screen functional sheet has the advantages such as bending is good, resistance is low, conduct electricity very well, light transmittance is high, structure is simple.
Description
Technical field
The utility model relates to capacitance-type touch screen technology field more particularly to a kind of capacitive touch screen functional sheet and
Capacitive touch screen including the capacitive touch screen functional sheet and the electronic device including the capacitive touch screen.
Background technique
With the increasingly raising of levels of substance, requirement of the consumer to electronic product is just toward lightening and flexibility, visual
Change, the fast development of the aspect of touch-control.Whole world touch screen and related industry chain are just dissolved into people at a terrific speed at present
Daily life in.In addition, flexible display technologies seem, display has the characteristic that can be bent or be curled into arbitrary shape, has
Gently, thin and the features such as be convenient for carrying.
Mainly use the inorganics oxide materials such as tin indium oxide (ITO) as touch screen function in existing industry
The transparent capacitive inductive layer of piece, since tin indium oxide needs full version magnetron sputtering, processing cost is high, energy consumption is high, graphically need through
The cumbersome processing step such as exposure mask, exposure, development, etching, washing is crossed, thus causes downstream industry chain cannot achieve and rapidly makes
Touch screen is made, electron industry brings many puzzlements and development bottleneck.For example, application No. is in CN201510135151.2
State's utility model patent, using ITO as transparent capacitive inductive layer；In another example application No. is the China of CN201710122121.7
Utility model patent makes capacitance touch screen functional sheet using Ag and ITO, it is mentioned that being made with the mixed structure of Ag and ITO
Functional sheet cannot achieve any bending, so that flexible touch screen can not be applied to.Also, since the physics of indium tin oxide layer is crisp
Property feature, is easy to be damaged in manufacturing process, long-term use process and bad environments change procedure.It develops a kind of than passing
The production technology of tin indium oxide (ITO) transparency conducting layer of system is simpler, production cost is lower, light transmission electrical property is more excellent and curved
The better capacitive touch screen functional sheet of folding endurance, becomes the inexorable trend of future technical advances.
Utility model content
For overcome the deficiencies in the prior art, one of the purpose of this utility model is to provide a kind of capacitive touch screen function
Can piece, cannot achieve any bending to solve existing capacitive touch screen functional sheet, be difficult to apply to flexible touch screen etc., separately
Outside, moreover it is possible to overcome that production technology complexity, high production cost, translucency existing for existing capacitive touch screen functional sheet be poor, resistance
Greatly, intolerant to abrasion the problems such as.
The two of the purpose of this utility model are to provide a kind of capacitive touch screen, which includes above-mentioned electricity
Appearance formula touch screen function piece.
The three of the purpose of this utility model are to provide a kind of electronic device, which includes above-mentioned capacitance touch
Screen.
One of the purpose of this utility model adopts the following technical scheme that realization:
A kind of capacitive touch screen functional sheet, including substrate, capacitive sensing layer, capacitive sensing layer protective layer, conducting electrode
Layer, wear-resistant conductive layer, disappear shadow protective layer and OCA optical cement adhesive layer, the conductive electrode layers include conducting electrode ontology and from
The conducting electrode lead that conducting electrode ontology extends outward, the capacitive sensing layer, capacitive sensing layer protective layer, the shadow that disappears protection
Layer and OCA optical cement adhesive layer are transparent；
The capacitive sensing layer is set to the surface of the substrate, and the capacitive sensing layer protective layer is set to the substrate
Surface and cover the capacitive sensing layer, the conducting electrode ontology is set on the capacitive sensing layer protective layer and is located at
At the outer rim of capacitive sensing layer, the wear-resistant conductive layer covers the conducting electrode lead, and the shadow protective layer that disappears is set to institute
State on capacitive sensing layer protective layer and cover conducting electrode ontology and capacitive sensing layer protective layer, the OCA optical cement adhesive layer
Disappear on shadow protective layer described in being set to and covers the shadow protective layer that disappears；
The capacitive sensing layer be used for incude touch when capacitance variations and generate positioning signal, capacitive sensing layer will positioning
Signal is successively transmitted to conducting electrode ontology, conducting electrode lead and wear-resistant conductive layer, and the wear-resistant conductive layer is by positioning signal
It transfers out.
Further, the substrate be flexible parent metal, the substrate with a thickness of 12~2000 μm.
Further, the capacitive sensing layer is nano-silver thread induction line film layer, the sheet resistance of the capacitive sensing layer≤
300 Ω, the capacitive sensing layer with a thickness of 35~2000nm.
Further, the capacitive sensing layer protective layer with a thickness of 10~300nm, the capacitive sensing layer protective layer
Sheet resistance≤300 Ω.
Further, the sheet resistance of the conductive electrode layers≤1 Ω, the conductive electrode layers with a thickness of 200~
20000nm。
Further, the sheet resistance of the wear-resistant conductive layer≤20 Ω, the wear-resistant conductive layer with a thickness of 1~20um.
Further, the shadow protective layer that disappears with a thickness of 30~5000nm；The OCA optical cement adhesive layer with a thickness of
1~200um.
The two of the purpose of this utility model adopt the following technical scheme that realization:
A kind of capacitive touch screen, the capacitive touch screen include above-mentioned capacitive touch screen functional sheet.
The three of the purpose of this utility model adopt the following technical scheme that realization:
A kind of electronic device, the electronic device include above-mentioned capacitive touch screen.
Compared with prior art, the utility model has the beneficial effects that:
(1) a kind of capacitive touch screen functional sheet of the utility model has excellent bending resistance, it can be achieved that any curved
Folding, distortion, can be widely applied for flexible touch screen technical field.Compared with traditional ITO conductive layer, the utility model capacitor
Formula touch screen function piece has the advantages such as resistance is low, conduct electricity very well, light transmittance is high, structure is simple.Meanwhile the utility model electricity
Each layer structure can be effectively protected in its distinctive structure of appearance formula touch screen function piece, be unlikely to Yin Mo in preparation and use process
It wipes and damages.
(2) in the utility model capacitive touch screen functional sheet, capacitive sensing layer is transparent conductive layer, and light transmittance is high；
Conductive electrode layers are as conductive lead wire, for reducing bulk loop resistance；Wear-resistant conductive layer is printed on conducting electrode lead, is used
It is not scratched when protecting conducting electrode lead to contact with wiring board；Capacitive sensing layer protective layer for capacitive sensing layer provide 1H with
The protective layer of upper hardness acts on, and certain thickness capacitive sensing layer protective layer is republished after print capacitor inductive layer, so that electric
Hold inductive layer to be connected across capacitive sensing layer protective layer with conductive electrode layers.The shadow protective layer that disappears is then for filling picture and text and non-figure
The gap at literary position to reduce the visual contrast of human eye, and provides the protective layer effect of 1H or more hardness.OCA optics gluing
Close layer be used for by functional sheet bonding touch screen panel, while OCA optical cement have colorless and transparent, light transmission rate 90% with
Feature upper, cementing strength is good.
(3) a kind of capacitive touch screen of the utility model and electronic device include above-mentioned capacitive touch screen functional sheet, tool
There are all advantages of above-mentioned capacitive touch screen functional sheet, with resistance is low, conduct electricity very well, production cost is low and bending is excellent
The features such as different, meets the requirement of flexible touch screen, arbitrarily can bend and distort.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the capacitive touch screen functional sheet of embodiment of the utility model；
Fig. 2 is the enlarged partial sectional view in capacitive touch screen functional sheet shown in Fig. 1 at conducting electrode ontology；
Fig. 3 is the cross-sectional view in capacitive touch screen functional sheet shown in Fig. 1 at conducting electrode ontology；
Fig. 4 is the enlarged partial sectional view in capacitive touch screen functional sheet shown in Fig. 1 at conducting electrode lead.
In figure: 10, substrate；20, capacitive sensing layer；30, capacitive sensing layer protective layer；40, conductive electrode layers；41, it conducts
Electrode body；42, conducting electrode lead；50, wear-resistant conductive layer；60, disappear shadow protective layer；70, OCA optical cement adhesive layer.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Fig. 1 is a kind of structural schematic diagram of the capacitive touch screen functional sheet of embodiment of the utility model.
As shown in Figs 1-4, a kind of electronic device with capacitive touch screen, for example, it may be smart phone, intelligence electricity
Depending on machine or tablet computer, the capacitive touch screen functional sheet in capacitive touch screen includes substrate 10, transparent capacitor sense
Answer layer 20, transparent capacitive sensing layer protective layer 30, conductive electrode layers 40, wear-resistant conductive layer 50, the transparent shadow protective layer 60 that disappears
With transparent OCA optical cement adhesive layer 70.Wherein, conductive electrode layers 40 include conducting electrode ontology 41 and from conducting electrode ontology
The 41 conducting electrode leads 42 extended outward.Capacitive sensing layer 20 is set to the middle part (table on substrate 10 of 10 upper surface of substrate
The area in face is greater than the area of 20 upper surface of capacitive sensing layer), capacitive sensing layer protective layer 30 is similarly provided at the upper of substrate 10
Surface simultaneously covers capacitive sensing layer 20, and conducting electrode ontology 41 is set to the upper surface of capacitive sensing layer protective layer 30 and is located at electricity
Hold at the outer rim of inductive layer 20 (i.e. as shown in figure 3, conducting electrode ontology 41 is set to the upper surface of capacitive sensing layer protective layer 30,
And conducting electrode ontology 41 is layed at the outer rim of capacitive sensing layer 20, at this point, the inside of conducting electrode ontology 41 is transparent
Capacitive sensing area, the region and its external region that conducting electrode ontology 41 covers are positioning signal conductive area).Conduction electricity
Pole lead 42 extends outwardly away from conducting electrode ontology 41 for conducting positioning signal, and wear-resistant conductive layer 50 covers conducting electrode
Lead 42, the shadow protective layer 60 that disappears are set to the upper surface of capacitive sensing layer protective layer 30 and cover conducting electrode ontology 41 and (correspond to
In positioning signal conductive area) and capacitive sensing floor protective layer 30 (corresponding to capacitive sensing area), OCA optical cement adhesive layer 70 is set
It is placed in and disappears on shadow protective layer 60 and cover the shadow protective layer 60 that disappears (can also cover the upper surface of entire substrate 10).Use the condenser type
When touch screen, above-mentioned capacitive touch screen is slided by finger, so that the capacitive sensing layer 20 on capacitive touch screen functional sheet
It is connected by human body and the earth, i.e. the ac signal of capacitance plate oneself excitation is transmitted to capacitive sensing layer 20, further passes through
Body capacitance and the earth are connected, and then change the frequency or wave crest of original excitation signal, form positioning signal after coupling, capacitor
Positioning signal is successively transmitted to conducting electrode ontology 41, conducting electrode lead 42 and wear-resistant conductive layer 50 by inductive layer 20, finally,
Positioning signal is transferred to the central processing unit of electronic device itself or outside by wear-resistant conductive layer 50, thus calculates positioning letter
Number position (i.e. finger touch capacitive touch screen position).Simultaneously as capacitive sensing layer 20, capacitive sensing layer protective layer
30, disappear shadow protective layer 60 and OCA optical cement adhesive layer 70 is transparent, so that the capacitive touch screen light transmittance is strong, not shadow
Ring the brightness of touch screen entirety.
As preferred embodiment, substrate 10 is preferably flexible parent metal, for example, polyester base material, including poly- terephthaldehyde
Sour second diester (PET) substrate, polyethylene terephthalate -1,4 cyclohexane dimethanol ester (PETG) substrate and dicarboxylic acid esters
One of substrate.Usual polyester base material (especially PET base material) can also be carried out hard by single side or double spread coating
Change processing, to reach the mechanical property requirements during manufacturing.Preferably, select two-sided hardening PET film as substrate 10.
Substrate 10 or polyethylene substrate, for example, polyvinyl chloride substrate, Vingon substrate, polyvinylbutyral substrate,
One of polystyrene substrate and polyacrylate base material.Substrate 10 can also be Kapton, polysulphone film and silicon
One of ketone film.The hardness of substrate is 1H or more, and light transmittance has reached 92%, mist degree 0.4%.
As preferred embodiment, the thickness of substrate 10 is preferably 12~2000 μm, and more preferably 50~200 μm.
As preferred embodiment, capacitive sensing layer 20 is nano-silver thread induction line film layer, capacitive sensing layer 20
Sheet resistance≤300 Ω, capacitive sensing layer 20 with a thickness of 35~2000nm.
As preferred embodiment, capacitive sensing layer protective layer 30 with a thickness of 10~300nm, to provide 1H or more
The protective layer of hardness acts on, and protection capacitive sensing layer protective layer 30 is not damaged in next printing process, capacitive sensing
Sheet resistance≤300 Ω of layer protective layer 30.As preferred embodiment, protecting capacitive sensing layer protective layer 30 can be heat cure
Property or UV photo-curable protection thin layer, Thermocurable or UV photo-curable protection thin layer use cellulose derivative, asphalt mixtures modified by epoxy resin
Rouge, epoxy acrylic resin, alkyd resin, amino resins, polyester resin, phenolic resin, vinyl chloride-vinyl acetate resin, polyamide, chlorine
Change acrylic resin, polyurethane modified acrylic resin, polyurethane resin, styrenemaleic acid resin, melamine resin, height
One or more of pine tar ester resin, organic siliconresin, silica solution, which are dissolved in solvent, to be formulated.
As preferred embodiment, sheet resistance≤1 Ω of conductive electrode layers 40, conductive electrode layers 40 with a thickness of 200~
20000nm.It is furthermore preferred that conductive electrode layers 40 are nontransparent conductive electrode, sheet resistance≤0.5 Ω.Conductive electrode layers 40 are by
Two electrically conductive inks are printed, for reducing the bulk loop resistance of capacitive touch screen functional sheet.Second electrically conductive ink by
At least one of nano-Ag particles, nano copper particle, graphene, micro-silver powder, silver-bearing copper powder, aluminium powder and nickel powder are formulated,
The viscosity of first electrically conductive ink is between 5~50000Mpa.s, more preferably between 50~500Mpa.s.
As preferred embodiment, wear-resistant conductive layer 50 is nontransparent conductive electrode, the sheet resistance of wear-resistant conductive layer 50
≤ 20 Ω, more preferably, sheet resistance≤10 Ω of wear-resistant conductive layer 50, wear-resistant conductive layer 50 with a thickness of 1~20um.Wear-resistant conductive layer
50 position for protecting conducting electrode lead 42 to contact with FPC (flexible circuit board) is from being scratched.In specific embodiment party
In formula, wear-resistant conductive layer 50 is made of the second electrically conductive ink, and the second electrically conductive ink is graphite, graphene, carbon black, conductive titanium dioxide
At least one of conductive fillers such as titanium, nano-Ag particles, nano copper particle, silver-bearing copper powder, micro-silver powder, aluminium powder and nickel powder are prepared
Made of electrocondution slurry.
As preferred embodiment, the transparent shadow protective layer 60 that disappears with a thickness of 30~5000nm, disappear shadow protective layer 60
Be covered on capacitive sensing layer protective layer 30 and conducting electrode ontology 41, for fill etch after the conduction region that is formed with it is non-conductive
Area gap, to further decrease the visual contrast of human eye, while providing the protective layer effect of 1H or more hardness.The shadow that disappears is protected
Sheath 60 is working fluid, by cellulose derivative, epoxy resin, epoxy acrylic resin, alkyd resin, amino resins, is gathered
Ester resin, phenolic resin, vinyl chloride-vinyl acetate resin, polyamide, chlorinated polypropylene, polyurethane modified acrylic resin, poly- ammonia
In ester resin, styrenemaleic acid resin, melamine resin, high pine tar ester resin, organic siliconresin and silica solution at least
One kind is dissolved in solvent and is formulated.
As preferred embodiment, transparent OCA optical cement adhesive layer 70 with a thickness of 1~200um, for by function
Piece is pasted on touch panel, have colorless and transparent, light transmission rate it is good in 90% or more, cementing strength, can room temperature or in
Temperature descends the advantages that solidification, also UV curable.Transparent OCA optical cement adhesive layer 70 is acrylic resin, unsaturated polyester (UP), epoxy
The polymerization of optical clear made of at least one of resin, polyurethane-acrylic resin, organic silicon resin and fluoropolymer
Object.
In the following, being specifically described the preparation method of the utility model capacitive touch screen functional sheet with embodiment 1-4.
Embodiment 1
Print steps: by gravure process, in pet substrate (in the present embodiment, the pet substrate progress of 12 μ m-thicks
Coated on both sides cure process, make its print surface hardness 1H, non-printed side hardness be 3H) on successively it is roll-to-roll printing 30nm thickness
Nano-silver thread film layer, the epoxy acrylic resin protective layer of 10nm thickness, 200nm thickness nano-Ag particles electrically conductive ink and 1 μ m-thick
Graphene conductive ink, it is every printing one layer be required to by drying, solidification can carry out next step printing.Nano-Ag particles are led
Electric ink includes body layer and the trace layer that extends outward from body layer, and epoxy acrylic resin protective layer covers nano-silver thread
Film layer, body layer and trace layer are all set on epoxy acrylic resin protective layer, and body layer is located at nano-silver thread film layer
At outer rim, Graphene conductive ink covers trace layer, obtains printing plate.
Etching step: yellow light etches capacitive sensing layer 20 on nanometer silverskin line layer, while yellow light etches (yellow light optical path
Wide 100um) it is located at the epoxy acrylic resin protective layer on nanometer silverskin line layer, the capacitor in circuit inductance area is prepared as a result,
Induction line film layer.Yellow light etching body layer obtains conducting electrode ontology 41, and yellow light etching trace layer obtains conducting electrode lead 42, together
Nano-silver thread film layer, epoxy acrylic resin protective layer under Shi Huangguang etching 41/ conducting electrode lead 42 of conducting electrode ontology
And the Graphene conductive ink on conducting electrode lead 42.
Make the shadow protective layer step that disappears: on epoxy acrylic resin protective layer and on conducting electrode ontology 41, by soft
Impression method, printing working fluid form the shadow protective layer 60 that disappears of 30nm thickness, which is made of epoxy resin.
Production OCA optical cement adhesive layer step: disappearing on shadow protective layer 60, is coated with OCA optical cement, shape by method of roll coating
At the OCA optical cement adhesive layer 70 (be also possible to OCA optical cement adhesive layer 70 cover entire substrate 10 upper surface) of 1 μ m-thick,
The OCA optical cement is made of polyurethane-acrylic resin, and capacitive touch screen functional sheet is made as a result,.
Embodiment 2
Print steps: by screen printing method, in polyvinyl chloride substrate (in the present embodiment, the non-printed side of 2000 μ m-thicks
Carry out single side coating cure process, make its hardness 3H) on successively it is roll-to-roll print 2000nm thickness nano-silver thread film layer,
The silver-bearing copper powder electrically conductive ink of the alkyd resin protective layer of 300nm thickness, the Graphene conductive ink of 20000nm thickness and 20 μ m-thicks, often
One layer of printing is required to that next step printing can be carried out by drying, solidification.Graphene conductive ink include body layer and from this
The trace layer that body layer extends outward, alkyd resin protective layer cover nano-silver thread film line layer, and body layer and trace layer are respectively provided with
In on alkyd resin protective layer, and body layer is located at the outer rim of nanometer silverskin line layer, and silver-bearing copper powder electrically conductive ink covers trace layer,
Obtain printing plate.
Etching step: laser-induced thermal etching goes out capacitive sensing layer 20, while laser-induced thermal etching (laser optical path on nanometer silverskin line layer
Wide 1um) it is located at the alkyd resin protective layer on nanometer silverskin line layer, the capacitive sensing route in circuit inductance area is prepared as a result,
Film layer.Laser-induced thermal etching body layer obtains conducting electrode ontology 41, and laser-induced thermal etching trace layer obtains conducting electrode lead 42, while laser loses
Carve nanometer silver film, alkyd resin protective layer and the conducting electrode lead under 41/ conducting electrode lead 42 of conducting electrode ontology
Silver-bearing copper powder electrically conductive ink on 42.
Production disappears shadow protective layer step: on alkyd resin protective layer and on conducting electrode ontology 41, by offset printing processes,
The shadow protective layer 60 that disappears that working fluid forms 5000nm thickness is printed, the working fluid is by polyamide, chlorinated polypropylene
It is made with polyurethane modified acrylic resin.
Production OCA optical cement adhesive layer step: disappearing on shadow protective layer 60, is coated with OCA optics by bar coating method
Glue, the OCA optical cement adhesive layer 70 for forming 200 μ m-thicks (are also possible to OCA optical cement adhesive layer 70 and cover the upper of entire substrate 10
Surface), which is made of organic silicon resin, and capacitive touch screen functional sheet is made as a result,.
Embodiment 3
Print steps: by jet printing method, successively roll-to-roll printing 80nm is thick on the polyimide substrate of 50 μ m-thicks
Nano-silver thread film layer, the phenolic resin protective layer of 100nm thickness, 5000nm thickness silver powder-copper powder electrically conductive ink and 5 μ m-thicks nanometer
Titanium dioxide granule electrically conductive ink, every one layer of printing are required to that next step printing can be carried out by drying, solidification.Silver powder-copper
Powder electrically conductive ink includes body layer and the trace layer that extends outward from body layer, and phenolic resin protective layer covers nano-silver thread film
Layer, body layer and trace layer are all set on phenolic resin protective layer, and body layer is located at the outer rim of nano-silver thread film layer, receives
Rice titanium dioxide granule electrically conductive ink covers trace layer, obtains printing plate.
Etching step: laser-induced thermal etching goes out capacitive sensing layer 20, while laser-induced thermal etching (laser optical path in nano-silver thread film layer
Wide 500um) it is located at the phenolic resin protective layer in nano-silver thread film layer, the capacitive sensing line in circuit inductance area is prepared as a result,
Road film layer.Laser-induced thermal etching body layer obtains conducting electrode ontology 41, and laser-induced thermal etching trace layer obtains conducting electrode lead 42, while laser
Nanometer silver film, phenolic resin protective layer and conducting electrode under etching 41/ conducting electrode lead 42 of conducting electrode ontology draw
Titanium dioxide nanoparticle electrically conductive ink on line 42.
Production disappears shadow protective layer step: on phenolic resin protective layer and on conducting electrode ontology 41, by method for stamping,
Print working fluid formed 200nm thickness the shadow protective layer 60 that disappears, the working fluid by melamine resin, high pine tar ester resin and
Organic siliconresin is made.
Production OCA optical cement adhesive layer step: disappearing on shadow protective layer 60, is coated with OCA optics by dimple coating method
Glue, the OCA optical cement adhesive layer 70 for forming 500 μ m-thicks (are also possible to OCA optical cement adhesive layer 70 and cover the upper of entire substrate 10
Surface), which is made of polyurethane-acrylic resin, and capacitive touch screen functional sheet is made as a result,.
Embodiment 4
Print steps: by gravure process, successively roll-to-roll printing 800nm is thick on the silicone substrate of 1000 μ m-thicks
Nano-silver thread film layer, the high pine tar ester resin protective layer of 200nm thickness, nickel powder-aluminium powder electrically conductive ink of 15000nm thickness and 15 μm
Thick graphite-carbon black-micro-silver powder electrically conductive ink, every one layer of printing are required to that next step print can be carried out by drying, solidification
Brush.Nickel powder-aluminium powder electrically conductive ink includes body layer and the trace layer that extends outward from body layer, high pine tar ester resin protective layer
Nano-silver thread film layer is covered, body layer and trace layer are all set in high pine tar ester resin protective layer, and body layer is located at nanometer
At the outer rim of silver wire film layer, graphite-carbon black-micro-silver powder electrically conductive ink covers trace layer, obtains printing plate.
Etching step: laser-induced thermal etching goes out capacitive sensing layer 20, while laser-induced thermal etching (laser optical path in nano-silver thread film layer
Wide 200um) it is located at the high pine tar ester resin protective layer on nanometer silver film, the capacitive sensing in circuit inductance area is prepared as a result,
Route film layer.Laser-induced thermal etching body layer obtains conducting electrode ontology 41, and laser-induced thermal etching trace layer obtains conducting electrode lead 42, swashs simultaneously
Nanometer silver film, high pine tar ester resin protective layer and the conduction being etched by light under 41/ conducting electrode lead 42 of conducting electrode ontology
Graphite-carbon black-micro-silver powder electrically conductive ink on contact conductor 42.
It makes the shadow protective layer step that disappears: in high pine tar ester resin protective layer and on conducting electrode ontology 41, passing through coining
Method, printing working fluid formed 1000nm thickness the shadow protective layer 60 that disappears, the working fluid by polyurethane modified acrylic resin,
Polyurethane resin and styrenemaleic acid resin are made.
Production OCA optical cement adhesive layer step: disappearing on shadow protective layer 60, is coated with OCA optics by slot coated method
Glue, the OCA optical cement adhesive layer 70 for forming 1000 μ m-thicks (are also possible to OCA optical cement adhesive layer 70 and cover entire substrate 10
Upper surface), which is made of fluoropolymer, and capacitive touch screen functional sheet is made as a result,.
Capacitive touch screen functional sheet prepared by embodiment 1-4 is used for following performance detection, testing result is shown in Table 1:
(1) surface hardness is tested:
The surface of the capacitive touch screen functional sheet in embodiment 1-4 is drawn using the pencil that hardness is 1H, length is not less than
10cm, number 10 times.After having drawn, stain is wiped with wet cloth, visually observing the surface of capacitive touch screen functional sheet, whether there is or not scuffings
Trace.
(2) anti-strike ability is tested:
Capacitive touch screen functional sheet in embodiment 1-4 is placed on the table, using weight be 67.5g, diameter is
The steel ball of 25.4mm is freely fallen from the top that height is 40cm, and drop point site is no less than at 5, after the completion of impact, is visually observed
Whether capacitive touch screen functional sheet surface there is slight crack.
(3) light transmission rate is tested
100% pure white picture is played on projector, is measured display screen center brightness value with colour analyzer, is calculated as
A, unit nit.It installs embodiment 1-4 capacitive touch screen functional sheet additional at the light hole of projector, white light is made to pass through capacitor sense
Area is answered, display screen center brightness value is measured with colour analyzer, is calculated as B, unit nit.By formula: light transmittance=B/A*
100% calculates light transmittance size.
(4) bending is tested
It is detected, one end of the capacitive touch screen functional sheet in embodiment 1-4 is fixed, separately using test machine is waved
One end swings and clamps, and the bending angle of capacitive touch screen functional sheet is set as being ± 60 °, to bend 20~30 per minute
Secondary speed cripping test 5min.Capacitive touch screen functional sheet is observed after testing, and whether there is or not breakages.
Capacitive touch screen functional sheet prepared by embodiment 1-4 is further assembled into the utility model by conventional method
A kind of electronic device with capacitive touch screen detects four kinds of electronic devices as follows, and testing result is shown in Table 1:
(1) anti-interference test:
A) machine is laid in desktop, opens pointer location testing tool, drips on 5ml water to touch screen, is stopping
After staying 10 seconds, water is dried, touch screen should be without any Novel presentation；
B) pointer location testing tool is opened, a finger is fixed to pin touch screen, display screen display static state ten
Wordline, another finger are slowly drawn close with laterally or longitudinally vertical sliding motion to static cross hairs on the touchscreen, and finally make to slide
Cross hairs and static cross hairs permeate in X-axis or Y-axis a line, during drawing close, static cross hairs cannot be violent
The displacement of shake, generation is less than 3mm.
(2) sensitivity test:
It should can incude 3M company MHP-1000S capacitance pen.
Test method: normally being crossed using MHP-1000S capacitance pen, is write, and the lines drawn do not allow to break, write out
Word does not allow disconnected stroke, judges induction sensitivity based on normal scribing line and writing situation.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Surface hardness test | Without scuffing trace | Without scuffing trace | Without scuffing trace | Without scuffing trace |
| Anti-strike ability test | It is flawless | It is flawless | It is flawless | It is flawless |
| Light transmission rate (%) | 92 | 95 | 97 | 96 |
| Bending test | Without breakage | Without breakage | Without breakage | Without breakage |
| Anti-interference test | It is noiseless | It is noiseless | It is noiseless | It is noiseless |
| Sensitivity test | Incude sensitive | Incude sensitive | Incude sensitive | Incude sensitive |
Above-mentioned test result shows that the capacitive touch screen functional sheet in embodiment 1-4 has good wear-resistant, resistance
Performance is beaten, light transmission rate is high, it can be achieved that any bending, distortion, can be widely applied for flexible touch screen technical field.By implementing
The electronic device with capacitive touch screen of capacitive touch screen functional sheet assembling in example 1-4 has sensitivity when touching
High, the features such as strong anti-interference performance and conductive capability are outstanding.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (9)
1. a kind of capacitive touch screen functional sheet, which is characterized in that including substrate, capacitive sensing layer, capacitive sensing layer protective layer,
Conductive electrode layers, wear-resistant conductive layer disappear shadow protective layer and OCA optical cement adhesive layer, the conductive electrode layers include conducting electrode
Ontology and the conducting electrode lead extended outward from conducting electrode ontology, the capacitive sensing layer, capacitive sensing layer protective layer,
Disappear shadow protective layer and OCA optical cement adhesive layer is transparent；
The capacitive sensing layer is set to the surface of the substrate, and the capacitive sensing layer protective layer is set to the table of the substrate
Face simultaneously covers the capacitive sensing layer, and the conducting electrode ontology is set on the capacitive sensing layer protective layer and is located at capacitor
At the outer rim of inductive layer, the wear-resistant conductive layer covers the conducting electrode lead, and the shadow protective layer that disappears is set to the electricity
Hold on inductive layer protective layer and cover conducting electrode ontology and capacitive sensing layer protective layer, the OCA optical cement adhesive layer setting
Disappear on shadow protective layer in described and cover the shadow protective layer that disappears；
Capacitance variations when the capacitive sensing layer is used to incude touch simultaneously generate positioning signal, and capacitive sensing layer is by positioning signal
It is successively transmitted to conducting electrode ontology, conducting electrode lead and wear-resistant conductive layer, the wear-resistant conductive layer transmits positioning signal
It goes out.
2. capacitive touch screen functional sheet as described in claim 1, which is characterized in that the substrate is flexible parent metal, described
Substrate with a thickness of 12~2000 μm.
3. capacitive touch screen functional sheet as described in claim 1, which is characterized in that the capacitive sensing layer is nano-silver thread
Induction line film layer, sheet resistance≤300 Ω of the capacitive sensing layer, the capacitive sensing layer with a thickness of 35~2000nm.
4. capacitive touch screen functional sheet as described in claim 1, which is characterized in that the thickness of the capacitive sensing layer protective layer
Degree is 10~300nm, sheet resistance≤300 Ω of the capacitive sensing layer protective layer.
5. capacitive touch screen functional sheet as described in claim 1, which is characterized in that sheet resistance≤1 of the conductive electrode layers
Ω, the conductive electrode layers with a thickness of 200~20000nm.
6. capacitive touch screen functional sheet as described in claim 1, which is characterized in that sheet resistance≤20 of the wear-resistant conductive layer
Ω, the wear-resistant conductive layer with a thickness of 1~20um.
7. capacitive touch screen functional sheet as described in claim 1, which is characterized in that the shadow protective layer that disappears with a thickness of 30
~5000nm；The OCA optical cement adhesive layer with a thickness of 1~200um.
8. a kind of capacitive touch screen, which is characterized in that the capacitive touch screen includes claim 1-7 described in any item
Capacitive touch screen functional sheet.
9. a kind of electronic device, which is characterized in that the electronic device includes capacitive touch screen according to any one of claims 8.
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Cited By (1)
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| CN108803954A (en) * | 2018-06-14 | 2018-11-13 | 珠海纳金科技有限公司 | Capacitive touch screen functional sheet, preparation method and capacitive touch screen and electronic device |
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