CN108803954A - Capacitive touch screen functional sheet, preparation method and capacitive touch screen and electronic device - Google Patents
Capacitive touch screen functional sheet, preparation method and capacitive touch screen and electronic device Download PDFInfo
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- CN108803954A CN108803954A CN201810614554.9A CN201810614554A CN108803954A CN 108803954 A CN108803954 A CN 108803954A CN 201810614554 A CN201810614554 A CN 201810614554A CN 108803954 A CN108803954 A CN 108803954A
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- touch screen
- capacitive sensing
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- capacitive touch
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Classifications
-
- 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
-
- 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
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention 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 layers; the conductive electrode layers include conducting electrode ontology and the conducting electrode lead that is extended outward from conducting electrode ontology, and the capacitive sensing layer, capacitive sensing layer protective layer disappear shadow protective layer and OCA optical cement adhesive layers are transparent.The invention also discloses a kind of preparation method of capacitive touch screen functional sheet, a kind of capacitive touch screen and a kind of electronic devices.Capacitive touch screen functional sheet of the present invention has that bending is good, resistance is low, conduct electricity very well, light transmittance is high, the advantages such as simple in structure.
Description
Technical field
The present invention relates to capacitance-type touch screen technology field more particularly to a kind of capacitive touch screen functional sheet, the capacitances
The preparation method of formula touch screen function piece and the capacitive touch screen including the capacitive touch screen functional sheet and including the electricity
The electronic device of appearance formula touch screen.
Background technology
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, high processing costs, energy consumption are big, graphically need through
The cumbersome processing step such as 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 patent of invention, using ITO as transparent capacitive inductive layer；In another example application No. is the Chinese inventions of CN201710122121.7
Patent makes capacitance touch screen functional sheet, it is mentioned that the functional sheet being made with the mixed structure of Ag and ITO using Ag and ITO
Arbitrary bending is cannot achieve, to which flexible touch screen can not be applied to.Also, due to the physics brittleness feature of indium tin oxide layer,
It is easy to be damaged in manufacturing process, long-time service process and bad environments change procedure.It develops a kind of than traditional oxygen
The production technology of changing indium tin (ITO) transparency conducting layer is simpler, production cost is lower, light transmission electrical property is better and bending more
Good capacitive touch screen functional sheet, becomes the inexorable trend of future technical advances.
Invention content
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of capacitive touch screen functions
Piece cannot achieve arbitrary bending to solve existing capacitive touch screen functional sheet, be difficult to apply to flexible touch screen etc., in addition,
Can also overcome existing for existing capacitive touch screen functional sheet production technology is complicated, production cost is high, translucency is poor, resistance is big,
The problems such as intolerant to abrasion.
The second object of the present invention is to provide a kind of preparation method of capacitive touch screen functional sheet, and this method has system
For simple for process, production cost is low, and the stability of capacitive touch screen functional sheet obtained is good, product yield is high.
The third object of the present invention is to provide a kind of capacitive touch screen, which includes above-mentioned condenser type
Touch screen function piece.
The fourth object of the present invention is to provide a kind of electronic device, which includes above-mentioned capacitive touch screen.
An object of the present invention 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 layers, 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 layers 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 cements adhesive layer
Disappear described in being set on shadow protective layer 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 transmitted to conducting electrode ontology, conducting electrode lead and wear-resistant conductive layer successively, and the wear-resistant conductive layer is by positioning signal
It transfers out.
Further, the substrate is flexible parent metal, and the thickness of the substrate is 12~2000 μm.
Further, the capacitive sensing layer is nano-silver thread induction line film layer, the sheet resistance of the capacitive sensing layer≤
The thickness of 300 Ω, the capacitive sensing layer are 35~2000nm.
Further, the thickness of the capacitive sensing layer protective layer is 10~300nm, the capacitive sensing layer protective layer
The Ω of sheet resistance≤300.
Further, the Ω of the sheet resistance of the conductive electrode layers≤1, the thickness of the conductive electrode layers is 200~
20000nm。
Further, the thickness of the Ω of the sheet resistance of the wear-resistant conductive layer≤20, the wear-resistant conductive layer are 1~20um.
Further, the thickness of the shadow protective layer that disappears is 30~5000nm；The thickness of the OCA optical cements adhesive layer is
1~200um.
The second object of the present invention adopts the following technical scheme that realization：
A kind of preparation method of capacitive touch screen functional sheet, including：
Print steps：Print first electrode layer, capacitive sensing layer protective layer, second successively on substrate by printing process
Electrode layer and third electrode layer, the second electrode lay includes body layer and the trace layer that is extended outward from body layer, described
Capacitive sensing layer protective layer covers the first electrode layer, and the body layer and trace layer may be contained within capacitive sensing layer protective layer
On, and the body layer is located at the outer rim of first electrode layer, the third electrode layer covers the trace layer, obtains printing plate；
Etching step：Capacitive sensing layer is etched in first electrode layer, while etching the capacitance sense on capacitive sensing layer
Answer a layer protective layer；Etching body layer obtains conducting electrode ontology, and etching trace layer obtains conducting electrode lead, while etching conducting electrode
The third electrode in first electrode layer, capacitive sensing layer protective layer and conducting electrode lead under ontology/conducting electrode lead
Layer；
Making disappears shadow protective layer step：It is printed on capacitive sensing layer protective layer and by printing process on conducting electrode ontology
Brush the shadow protective layer that disappears；
Make OCA optical cement adhesive layer steps：OCA optical cements are coated with by coating method on shadow protective layer disappearing, are formed
OCA optical cement adhesive layers.
Further, the printing process is gravure process, flexo method, screen printing method, offset printing processes, spray printing side
It is one or more in method and method for stamping, the coating method be method of roll coating, slot coated method, dimple coating method and
One kind in bar coating method.
Further, described to be etched to laser-induced thermal etching, the width of the laser-induced thermal etching circuit is 1~500um.
The third object of the present invention adopts 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 fourth object of the present invention adopts 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 beneficial effects of the present invention are：
(1) a kind of capacitive touch screen functional sheet of the present invention has excellent bending resistance, it can be achieved that arbitrary bending, torsion
Song can be widely applied for flexible touch screen technical field.Compared with traditional ITO conductive layer, capacitive touch screen of the present invention
Functional sheet has that resistance is low, conduct electricity very well, light transmittance is high, the advantages such as simple in structure.Meanwhile capacitive touch screen work(of the present invention
Its distinctive structure of energy piece can be effectively protected each layer structure, be unlikely to damage because of friction during preparation and use.
(2) in capacitive touch screen functional sheet of the present invention, capacitive sensing layer is transparent conductive layer, and light transmittance is high；Conduction
Electrode layer is as conductive lead wire, for reducing bulk loop resistance；Wear-resistant conductive layer is printed on conducting electrode lead, for protecting
Shield conducting electrode lead is not scratched when being contacted with wiring board；Capacitive sensing layer protective layer provides 1H or more firmly for capacitive sensing layer
The protective layer of degree acts on, and certain thickness capacitive sensing layer protective layer is republished after print capacitor inductive layer so that capacitance sense
Layer is answered to be connected with conductive electrode layers across capacitive sensing layer protective layer.The shadow protective layer that disappears is then for filling picture and text and non-graphic portion
The gap of position to reduce the visual contrast of human eye, and provides the protective layer effect of 1H or more hardness.OCA optical cement adhesive layers
Panel for functional sheet to be bonded to touch screen, at the same OCA optical cements have water white transparency, light transmission rate 90% or more,
The good feature of cementing strength.
(3) a kind of capacitive touch screen of the present invention and electronic device include above-mentioned capacitive touch screen functional sheet, are had upper
All advantages of capacitive touch screen functional sheet are stated, there is resistance is low, conduct electricity very well, production cost is low and bending is excellent etc.
Feature meets the requirement of flexible touch screen, arbitrarily can bend and distort.
Description of the drawings
Fig. 1 is the structural schematic diagram of the capacitive touch screen functional sheet of one embodiment of the present invention；
Fig. 2 is the enlarged partial sectional view at conducting electrode ontology in capacitive touch screen functional sheet shown in Fig. 1；
Fig. 3 is the sectional view at conducting electrode ontology in capacitive touch screen functional sheet shown in Fig. 1；
Fig. 4 is the enlarged partial sectional view at conducting electrode lead in capacitive touch screen functional sheet shown in Fig. 1.
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 cements adhesive layer.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the present invention is described further, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
Fig. 1 is the structural schematic diagram of the capacitive touch screen functional sheet of one embodiment of the present invention.
As shown in Figs 1-4, a kind of electronic device with capacitive touch screen, for example, it may be smart mobile phone, intelligence electricity
Depending on machine or tablet computer, the capacitive touch screen functional sheet in capacitive touch screen includes substrate 10, transparent capacitance 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 cements 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 middle part (10 upper table of substrate of 10 upper surface of substrate
The area in face is more 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 positioned 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 cements 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 (upper surface that can also cover 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 is connected with the earth, and then changes the frequency or wave crest of original excitation signal, forms positioning signal after coupling, capacitance
Positioning signal is transmitted to conducting electrode ontology 41, conducting electrode lead 42 and wear-resistant conductive layer 50 by inductive layer 20 successively, finally,
Positioning signal is transferred to electronic device itself or the central processing unit of 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 cements 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) base material, polyethylene terephthalate -1,4 cyclohexane dimethanol ester (PETG) base material and dicarboxylic acid esters
One kind in base material.Usual polyester base material (especially PET base material) can also be carried out hard by single side or double spread coating
Change is handled, to reach the mechanical property requirements during manufacturing.Preferably, select two-sided hardening PET film as substrate 10.
Substrate 10 or polyethylene base material, for example, polyvinyl chloride base material, Vingon base material, polyvinylbutyral substrate,
One kind in polystyrene base material and polyacrylate base material.Substrate 10 can also be Kapton, polysulphone film and silicon
One kind in 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, more preferably 50~200 μm.
As preferred embodiment, capacitive sensing layer 20 is nano-silver thread induction line film layer, capacitive sensing layer 20
The thickness of the Ω of sheet resistance≤300, capacitive sensing layer 20 are 35~2000nm.
As preferred embodiment, the thickness of capacitive sensing layer protective layer 30 is 10~300nm, to provide 1H or more
The protective layer of hardness acts on, and protection capacitive sensing layer protective layer 30 is without damage in next printing process, capacitive sensing
Sheet resistance≤300 Ω of layer protective layer 30.As preferred embodiment, protection capacitive sensing layer protective layer 30 can be heat cure
Property or UV photo-curables protection thin layer, Thermocurable or UV photo-curables protection thin layer using cellulose derivative, asphalt mixtures modified by epoxy resin
Fat, 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, melmac, height
One or more of pine tar ester resin, organic siliconresin, Ludox, which are dissolved in solvent, to be formulated.
As preferred embodiment, the Ω of the sheet resistance of conductive electrode layers 40≤1, the thickness of conductive electrode layers 40 is 200~
20000nm.It is furthermore preferred that conductive electrode layers 40 are nontransparent conductive electrode, the Ω of sheet resistance≤0.5.Conductive electrode layers 40 are by
One electrically conductive ink is printed, for reducing the bulk loop resistance of capacitive touch screen functional sheet.First 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, the Ω of the sheet resistance of wear-resistant conductive layer 50≤10, the thickness of wear-resistant conductive layer 50 is 1~20um.Wear-resistant conductive layer
50 for protecting the position that conducting electrode lead 42 is contacted with FPC (flexible circuit board) 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 thickness of the transparent shadow protective layer 60 that disappears is 30~5000nm, and 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, at the same provide 1H or more hardness protective layer effect.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, melmac, high pine tar ester resin, organic siliconresin and Ludox at least
One kind is dissolved in solvent and is formulated.
As preferred embodiment, the thickness of transparent OCA optical cements adhesive layer 70 is 1~200um, is used for function
Piece is pasted onto on touch panel, has water white transparency, light transmission rate good in 90% or more, cementing strength, can room temperature or in
Temperature descends the advantages that solidification, also UV curable.Transparent OCA optical cements adhesive layer 70 is acrylic resin, unsaturated polyester (UP), epoxy
Optical clear made of at least one of resin, polyurethane-acrylic resin, organic silicon resin and fluoropolymer polymerize
Object.
In the following, being specifically described the preparation method of capacitive touch screen functional sheet of the present invention 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, it is 1H so that it is printed surface hardness, and non-printed side hardness is 3H) on successively roll-to-roll printing 30nm it is thick
The nano-Ag particles electrically conductive ink and 1 μ m-thick of nano-silver thread film layer, the epoxy acrylic resin protective layer of 10nm thickness, 200nm thickness
Graphene conductive ink, often print 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 is extended outward from body layer, and epoxy acrylic resin protective layer covers nanometer silverskin
Layer, body layer and trace layer may be contained on epoxy acrylic resin protective layer, and body layer is located at the outer of nano-silver thread film layer
At edge, Graphene conductive ink covers trace layer, obtains printing plate.
Etching step：Yellow light etches capacitive sensing layer 20 in nano-silver thread film layer, while yellow light etches (yellow light light path
Wide 100um) it is located at the epoxy acrylic resin protective layer in nano-silver thread film layer, the capacitance 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 41/ conducting electrode lead 42 of Shi Huangguang etching conducting electrodes ontology
And the Graphene conductive ink on conducting electrode lead 42.
Making disappears shadow protective layer step：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.
Make OCA optical cement adhesive layer steps：Disappearing on shadow protective layer 60, OCA optical cements, shape are coated with by method of roll coating
At the OCA optical cements adhesive layer 70 (can also be the upper surface that OCA optical cements adhesive layer 70 covers entire substrate 10) of 1 μ m-thick,
The OCA optical cements are 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 be 3H) on successively it is roll-to-roll printing 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 by drying, solidification next step printing can be carried out.Graphene conductive ink include body layer and from this
The trace layer that body layer extends outward, alkyd resin protective layer cover nanometer silver film, and body layer and trace layer may be contained within alcohol
On acid resin protective layer, and body layer is located at the outer rim of nano-silver thread film layer, and silver-bearing copper powder electrically conductive ink covers trace layer, must print
Brush board.
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 1um) it is located at the alkyd resin protective layer in nano-silver thread film layer, the capacitive sensing circuit 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.
Making 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.
Make OCA optical cement adhesive layer steps：Disappearing on shadow protective layer 60, OCA optics is coated with by bar coating method
Glue, the OCA optical cements adhesive layer 70 for forming 200 μ m-thicks (can also be that OCA optical cements adhesive layer 70 covers 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, roll-to-roll printing 80nm is thick successively 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 often prints one layer and is required to that by drying, solidification next step printing can be carried out.Silver powder-copper
Powder electrically conductive ink includes body layer and the trace layer that is extended outward from body layer, and phenolic resin protective layer covers nano-silver thread film
Layer, body layer and trace layer may be contained 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
Etch nano-silver thread film layer, phenolic resin protective layer and the conducting electrode under 41/ conducting electrode lead 42 of conducting electrode ontology
Titanium dioxide nanoparticle electrically conductive ink on lead 42.
Making 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 melmac, high pine tar ester resin and
Organic siliconresin is made.
Make OCA optical cement adhesive layer steps：Disappearing on shadow protective layer 60, OCA optics is coated with by dimple coating method
Glue, the OCA optical cements adhesive layer 70 for forming 500 μ m-thicks (can also be that OCA optical cements adhesive layer 70 covers 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, roll-to-roll printing 800nm is thick successively 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 often prints one layer and is required to that by drying, solidification next step print can be carried out
Brush.Nickel powder-aluminium powder electrically conductive ink includes body layer and the trace layer that is extended outward from body layer, high pine tar ester resin protective layer
Nano-silver thread film layer is covered, body layer and trace layer may be contained 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 in nano-silver thread film layer, the capacitance sense in circuit inductance area is prepared as a result,
Answer circuit 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, simultaneously
Nano-silver thread film layer, high pine tar ester resin protective layer under 41/ conducting electrode lead 42 of laser-induced thermal etching conducting electrode ontology and
Graphite-carbon black-micro-silver powder electrically conductive ink on conducting electrode lead 42.
Making disappears shadow protective layer step：In high pine tar ester resin protective layer and on conducting electrode ontology 41, pass 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.
Make OCA optical cement adhesive layer steps：Disappearing on shadow protective layer 60, OCA optics is coated with by slot coated method
Glue, the OCA optical cements adhesive layer 70 for forming 1000 μ m-thicks (can also be that OCA optical cements adhesive layer 70 covers 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, and testing result is shown in Table 1：
(1) case 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：
On the table by the capacitive touch screen functional sheet placement in embodiment 1-4, the use of weight is 67.5g, a diameter of
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 projecting apparatus, 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 sheets additional at the light hole of projecting apparatus, white light is made to pass through capacitance 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 °, with bending 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.
Assembly cost invention is a kind of by conventional method for the capacitive touch screen functional sheet further prepared by embodiment 1-4
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 tools, 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 tools are opened, touch screen, display screen display static state ten are pinned in finger fixation
Wordline, another finger is slowly drawn close with laterally or longitudinally vertical sliding motion to static cross hairs on the touchscreen, and finally makes sliding
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 companies MHP-1000S capacitance pens.
Test method：It is normally crossed, is write using MHP-1000S capacitance pens, the lines drawn do not allow to break, write out
Word does not allow disconnected stroke, and induction sensitivity is judged based on normal scribing line and writing situation.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Case hardness is tested | Without scuffing trace | Without scuffing trace | Without scuffing trace | Without scuffing trace |
| Anti-strike ability is tested | It is flawless | It is flawless | It is flawless | It is flawless |
| Light transmission rate (%) | 92 | 95 | 97 | 96 |
| Bending is tested | 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 arbitrary 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.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (10)
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 layers, 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 layers 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 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 capacitance
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 cements 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 transmitted to conducting electrode ontology, conducting electrode lead and wear-resistant conductive layer successively, 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
The thickness of substrate is 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, the Ω of the sheet resistance of the capacitive sensing layer≤300, the thickness of the capacitive sensing layer is 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, the Ω of the sheet resistance of the capacitive sensing layer protective layer≤300.
5. capacitive touch screen functional sheet as described in claim 1, which is characterized in that sheet resistance≤1 of the conductive electrode layers
The thickness of Ω, the conductive electrode layers are 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
The thickness of Ω, the wear-resistant conductive layer are 1~20um.
7. capacitive touch screen functional sheet as described in claim 1, which is characterized in that the thickness of the shadow protective layer that disappears is 30
~5000nm；The thickness of the OCA optical cements adhesive layer is 1~200um.
8. a kind of preparation method of such as claim 1-7 any one of them capacitive touch screen functional sheets, which is characterized in that packet
It includes：
Print steps：Print first electrode layer, capacitive sensing layer protective layer, second electrode successively on substrate by printing process
Layer and third electrode layer, the second electrode lay include body layer and the trace layer that is extended outward from body layer, the capacitance
Inductive layer protective layer covers the first electrode layer, and the body layer and trace layer may be contained on capacitive sensing layer protective layer,
And the body layer is located at the outer rim of first electrode layer, the third electrode layer covers the trace layer, obtains printing plate；
Etching step：Capacitive sensing layer is etched in first electrode layer, while etching the capacitive sensing layer on capacitive sensing layer
Protective layer；Etching body layer obtains conducting electrode ontology, and etching trace layer obtains conducting electrode lead, while etching conducting electrode sheet
The third electrode layer in first electrode layer, capacitive sensing layer protective layer and conducting electrode lead under body/conducting electrode lead；
Making disappears shadow protective layer step：Disappeared by printing process printing on capacitive sensing layer protective layer and on conducting electrode ontology
Shadow protective layer；
Make OCA optical cement adhesive layer steps：OCA optical cements are coated with by coating method on shadow protective layer disappearing, form OCA light
Learn glue bond layer.
9. a kind of capacitive touch screen, which is characterized in that the capacitive touch screen includes claim 1-7 any one of them
Capacitive touch screen functional sheet.
10. a kind of electronic device, which is characterized in that the electronic device includes the capacitive touch screen described in claim 9.
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