CN1977343A - Composite transparent conductive substrate for touch panel and touch panel - Google Patents
Composite transparent conductive substrate for touch panel and touch panel Download PDFInfo
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- CN1977343A CN1977343A CNA2005800214531A CN200580021453A CN1977343A CN 1977343 A CN1977343 A CN 1977343A CN A2005800214531 A CNA2005800214531 A CN A2005800214531A CN 200580021453 A CN200580021453 A CN 200580021453A CN 1977343 A CN1977343 A CN 1977343A
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- touch panel
- transparent conductive
- polymer
- conductive substrate
- composite transparent
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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
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/025—Electric or magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/62—Insulating-layers or insulating-films on metal bodies
Abstract
A composite transparent conductive substrate for touch panels satisfying the characteristics of drawing type touch panels comprising a substrate (A) composed of a polymer film or a polymer sheet, a transparent conductive layer (B) and a dielectric layer (C) laid in this order wherein the dielectric layer (C) is composed of an organic polymer having a dielectric constant of not less than 15 at a temperature of 20 DEG C and a frequency of 1 kHz, and has a thickness of 40-2000 nm.
Description
Technical field
The present invention relates to the composite transparent conductive substrate of a kind of touch panel (being touch pad, touch-screen) usefulness.
Background technology
As touch panel,, therefore we can say as man-machine interface it is excellent owing to only need the display part of contact display can use with regard to whom.The touch panel of the personal portable information equipment upper resistance film mode that is enlarging in demand just is used.
The touch panel of existing resistance membrane type is the mode of carrying out pressing operation with finger and pen etc., it is the so-called mode of getting ready, the key property that the transparent electroplax film (transparent conductive base) of the touch panel of this mode requires to have is: (a) Gui Ding resistance value, and resistance value is even; The stability of the resistance value under (b) hot and humid; And (c) get durability ready by with low uncertainty this of getting the resistance value that causes ready.Therefore because being located at the thin thickness of the transparent conductivity layer on the transparent conductive base usually is 10～40nm, by getting the generation etc. that the transparent conductivity layer causes distortion, wearing and tearing, crackle easily ready.Therefore the most scabrous characteristic is to get durability ready among the above-mentioned key property, in order to solve this problem, has once proposed various schemes.For example, having proposed on the one side at least of transparent base film, is the electrically conducting transparent laminated body (patent documentation 1) that the anchoring layer that contains siloxane bond of 0.02～10 μ m is provided with transparency conducting layer by thickness.Though this method has the stability of the resistance value under hot and humid, durability is insufficient.In addition, also proposed to contain the transparent conductive base with conductive surface (patent documentation 2) of electric conductive polymer.Though this method excellent in te pins of durability exists in the problem that hot and humid resistance value down rises.
Patent documentation 1: the spy opens 2002-367436 communique claim 2
Patent documentation 2: the spy opens 2002-109998 communique claim 4
Summary of the invention
Get ready the mode except existing, just carrying out the exploitation of describable touch panel in recent years.Describing the key property that the transparent conductive base of the touch panel of type requires to have is: (a) Gui Ding resistance value, and resistance value is even; The stability of the resistance value under (b) hot and humid; And (c) describe durability by with low uncertainty this of the resistance value of describing to cause.Describe because pen slides on touch panel, therefore with get ratio ready, greatly with the plastic deformation and the wearing and tearing of transparent conductive base.Existing transparent conductive base can not satisfy all these characteristics.
The invention provides a kind of resistance value with (a) defined, and resistance value is even, the variation of the resistance value under (b) hot and humid is little, and (c) by the transparent conductive base with low uncertainty of the resistance value of describing to cause.
The present invention relates to the touch panel of a kind of composite transparent conductive substrate for touch panel and this base material of use, described composite transparent conductive substrate for touch panel, sequentially laminated have base material (A), transparency conducting layer (B) and a dielectric layer (C) that is made of thin polymer film or polymer sheet, dielectric layer (C) is that organic polymer more than 15 constitutes by the dielectric constant under 20 ℃ of temperature, frequency 1kHz, and the thickness of dielectric layer (C) is 40～2000nm.
The invention effect
Composite transparent conductive substrate of the present invention, because at the excellent in stability of hot and humid resistance value down, and with low uncertainty by the resistance value of describing to cause, therefore to describe the transparent conductive base that the touch panel of type uses be excellent in conduct.
Description of drawings
Fig. 1 is the skeleton diagram of expression touch panel of the present invention with an example in the cross section of composite transparent base material.
Fig. 2 is the ideograph by the evaluation method of the resistance change describing cause of expression among the embodiment.
Fig. 3 is expression and the figure of the linear relationship of the voltage of measuring by the evaluation of Fig. 2.
Symbol description
1. the base material that constitutes by thin polymer film or sheet (A)
2. transparency conducting layer (B)
3. dielectric layer (C)
4. surface cure layer (D)
Embodiment
Composite transparent conductive substrate of the present invention, sequentially laminated base material (A), transparency conducting layer (B) and the dielectric layer (C) that has had by high score film or polymer sheet (hereinafter referred to as film/sheet) to constitute.
Moreover here, so-called film is meant that thickness is the film of 1～500 μ m, so-called sheet be meant thickness greater than 500 μ m, be sheet below the 2mm.
Composite transparent conductive substrate of the present invention is the parts that are used as the transparency electrode of touch panel.The touch panel of resistive film mode disposes upper electrode and lower electrode with separating certain clearance.In order to prevent that electrode misconnection to each other from touching, also set-point sept between electrode up and down sometimes.When depressing certain of touch panel when a bit, the upper/lower electrode of this part comes in contact and becomes and can switch on.Apply voltage by either party and produce electric potential gradient,, can detect the current potential of contact point by by another electrode detection current potential to upper/lower electrode.Calculate the coordinate of contact point by the relation of detected current potential and electric potential gradient.In such mechanism, transparent conductive base can be out of shape and stress repeatedly, and the transparent conductivity layer is easy to generate crackle.
By the laminated dielectric layer that is made of organic polymer (C) on transparency conducting layer (B), transparency conducting layer (B) can become crackle be difficult for to take place, and is improved significantly by the variation of the resistance value of describing to cause.Yet, when use organic polymer cover transparency conducting layer (B) above the time, sheet resistance value obviously increases usually, is not suitable as transparency electrode.As described above, when using the polymer of conductivity,, exist in the problem that hot and humid resistance value down rises though this problem can be resolved.The employed touch panel of the equipment of outdoor applications such as mobile information apparatus, the excellent in stability of the resistance value under hot and humid is important, therefore require to have concurrently the stability of hot and humid resistance value down with describe durability.
The present invention finds: is that organic polymer more than 15 constitutes and thickness is the dielectric layer (C) of 40～2000nm by go up laminated at transparency conducting layer (B) by the dielectric constant under 20 ℃ of temperature, frequency 1kHz, can make the excellent in stability of the resistance value under hot and humid and by the composite transparent conductive substrate with low uncertainty of the resistance value of describing to cause.
The present invention also finds: dielectric constant is the organic polymer more than 15, although specific insulation value height, but on transparency conducting layer, form the occasion of the film of suitable thickness, big variation is not than taking place in the sheet resistance value of organic polymer layers and the sheet resistance value of transparency conducting layer, can obtain being suitable for the resistance value in the scope of touch panel.
As the dielectric constant under 20 ℃ of temperature, frequency 1kHz is organic polymer more than 15, the preferred organic polymer of cyanoethylation.Wherein, more preferably from the cyanoethylation polymer of cellulose-based polymer such as cyanethyl cellulose, cyanoethyl hydroxyethylcellulose, the organic polymer of one or two or more kinds that select in cyanoethylation polymer, cyanoethyl polyvinyl alcohol, cyanoethyl sucrose and the cyanoethyl D-sorbite of starch based polymers such as cyanoethyl starch, cyanoethyl hydroxypropul starch, cyanoethyl amylopectin, cyanoethyl glycidol amylopectin.Wherein, preferred especially cyanoethyl amylopectin is because so can make the also high composite transparent conductive substrate of stability that has flexibility, describes durability height and the resistance value under hot and humid.
In addition, also can preferably use the acetylation amylopectin as organic polymer.No matter the acetylation amylopectin is independent use; still mix use with the organic polymer of cyanoethylation; all can make the also high composite transparent conductive substrate of stability that has flexibility, describes durability height and the resistance value under hot and humid, thus preferred.
In addition, the thickness of dielectric layer (C) is preferably 40～2000nm.The stability of the resistance value during less than 40nm under hot and humid to improve effect low, and describe durability to improve effect not high yet.Sheet resistance value increases when surpassing 2000nm.Preferred scope is 80～800nm.
The sheet resistance value of composite transparent conductive substrate is 100～1000 Ω/ preferably.Sheet resistance value is during less than 100 Ω/, and the power consumption of touch panel increases.Sheet resistance value is subjected to the influence of wave interference during greater than 1000 Ω/ easily.The sheet resistance value of composite transparent conductive substrate is more preferably 200～500 Ω/.When thickening the thickness of transparency conducting layer, sheet resistance value reduces, but light penetration also reduces, and has the drawback of the transparent variation of touch panel.Total light penetration of composite transparent conductive substrate is preferably more than 80%, is more preferably more than 85%.
In addition, said here sheet resistance value is meant at dielectric layer (C) and goes up the sheet resistance value of measuring.
As the film/sheet that becomes base material (A), preferably by polycarbonate resin, acrylic resin, be film/sheet that the transparent high resin of the mylar such as acetate resins, cyclic polyolefin, PETG and PEN or the like of representative obtains through moulding with the triacetate.Wherein, more preferably the transparency is high, thermal endurance is high and film/the sheet of being made by PETG of flexibility is arranged.
In addition, in order to improve the adhesiveness with transparency conducting layer (B), preferably before laminated with transparency conducting layer (B), coat binding resin or carry out surface treatment such as discharge process on film/sheet.In addition,, therefore also preferably implement heat treatment in advance, become the strain of the reason of contraction with elimination because film/sheet often shrinks because of being heated.
The touch panel of the present invention transparent conductive film layer (B) of composite base material, preferably the metal of conductive metal oxides such as the metallic film as thin as a wafer of gold, silver, copper etc. or indium oxide (can contain tin oxide and/or zinc oxide), tin oxide, zinc oxide or the like is a transparent conducting film.Wherein, more preferably the transparency is high scope and the low conductive metal oxide of resistance value.Especially be selected from a kind of or compound more than two kinds among indium oxide, tin oxide and the zinc oxide, sheet resistance value is low, and the transparency is high, and the chemical change that is caused by humidity is few, thereby preferred.Moreover transparency conducting layer (B) also can multilayer stratum metal be a transparent conducting film and forming.
It is the occasion of transparent conducting film that transparency conducting layer (B) uses metal, the resistance value under hot and humid with low uncertainty, but big by the variation of the resistance value of describing to cause when having only transparency conducting layer (B)., go up the laminated occasion that dielectric layer (C) arranged, also can reduce variation by the resistance value of describing to cause at transparency conducting layer (B).
These transparent conducting films can adopt the vacuum vapour deposition that is called as PVD of electron beam evaporation plating, sputter, ion plating etc. to go up at base material (A) and form.Metal is a transparent conducting film, and the preferred selected metal that is suitable for the characteristic of purpose purposes is the transparent conductivity material, adopts suitable film-forming method to form.In addition, metal is a transparent conducting film owing to can change the characteristic of sheet resistance value, light penetration, light reflectance etc. by heat treatment, therefore also can implement heat treatment etc. as required.Moreover, metal is that the general rerum natura and the manufacture method of transparent conductive film recorded and narrated in " electrically conducting transparent membrane technology " the 3rd chapter, the 4th Zhanghe the 5th chapter (JSPS, transparent oxide photoelectron material the 166th committee compile, the distribution of オ one system company) etc. in detail.
Transparency conducting layer (B) is the occasion that the transparent conductivity material constitutes by metal, and its thickness should be corresponding to purposes, suitably determine according to desired sheet resistance value and light penetration, but 5nm～0.5 μ m preferably.Consider that from the aspect of sheet resistance value, light penetration and flexibility the thickness of transparency conducting layer (B) is more preferably 10nm～0.2 μ m.This is because when thickness during less than 5nm, sheet resistance increases, when thickness surpasses 0.5 μ m, because the light absorption of transparency conducting layer (B) makes the light penetration reduction, and the cause that sheet resistance value less reduces.
In addition, the material of transparency conducting layer (B) can be an electric conductive polymer.As electric conductive polymer, preferably under the thickness of 2 μ m, have the light penetration more than 50%, and have 1.0 * 10
-8The material of the conductance of S/cm.
About electric conductive polymer, (Ji Ye wins U.S. work at " talking about electric conductive polymer " the 5th chapter, Nikkan Kogyo Shimbun's distribution), " electric conductive polymer " (thread Fang Zhi volume, the distribution of the talk サ イ エ of society Application テ イ Off イ Network) or among " Science and Application of Conducting Polymers " volumes such as (, Adam Hilger distribution) W.R.Salaneck etc. described in detail.
Transparency conducting layer (B) uses the occasion of transparent conductivity polymer, with low uncertainty by the resistance value of describing to cause, but the variation of the resistance value under hot and humid is big when having only transparency conducting layer (B).
By going up laminated dielectric layer (C), can reduce the resistance change under hot and humid at transparency conducting layer (B).
The preferred electric conductive polymer that is used for transparency conducting layer (B), from the angle of the transparency, conductivity and flexibility, be the mixture etc. of one or two or more kinds arbitrarily that is selected from the derivative of polypyrrole, polythiophene, poly-furans, poly-selenophen, polyaniline, polyparaphenylene, poly-fluorenes, these materials and constitutes electric conductive polymer in the copolymer of monomer of these materials.Wherein, be selected from by importing side chain, water or other solvent are had the derivative of solubility or dispersed polythiophene, poly alkyl fluorene, poly-fluorenes, polyparaphenylene, poly (phenylenevinylene) and constitute at least a electric conductive polymer among the copolymer of monomer of these materials, because the transparency and excellent electric conductivity, and can be coated on film/sheet, can be formed uniformly the electric conductive polymer film of suitable depth, thereby more preferably.The electric conductive polymer that particularly contains poly-dihydroxy thiophene, the electric conductive polymer of forming by the mixture of polyethylene dioxythiophene (PEDT) and polystyrolsulfon acid (PSS) wherein, owing to can in water or other solvent, dissolve or disperse, therefore can easily be coated on film/sheet, and can form the transparency and the extra high film of conductivity, thereby most preferably.Te Kaiping 7-90060 communique or the international manufacture method that has proposed in water or other solvent, to dissolve or be dispersed with the resin liquid of the electric conductive polymer of forming by polyethylene dioxythiophene and polystyrolsulfon acid in No. 02/067273 brochure that disclose.
In addition, by adding the particle of polystyrene particle, acrylic resin particle etc. in electric conductive polymer, sliding improves, therefore with film/when the sheet cutting becomes the display picture size, become easily through the accumulation of the film/sheet of cutting, thereby preferably.In addition, by add other resin in electric conductive polymer, the intensity of transparency conducting layer (B) increases, and rubs and the quality stability of the durability that scratches etc. improves, and is therefore preferred.
The method that goes up laminated electric conductive polymer at base material (A) has electrolysis polymerization method, vapour deposition method, coating (coating) method etc., can suitably select according to the kind of purposes, electric conductive polymer., when adopting the laminated electric conductive polymer that is dissolved in water or other solvents of rubbing method since can resemble on the base material that width is wide, length is long film/sheet equably, laminated with the thickness of regulation, thereby more preferably.The method of coating is not particularly limited, and can select suitable method according to purposes.The whole bag of tricks of coating is existing detailed description the in detail in " coating method " the 1st chapter～the 18th chapter documents such as (former rugged brave work, the distribution of hardwood bookstore).
Use the thickness of transparency conducting layer (B) of occasion of electric conductive polymer different and different according to the kind of electric conductive polymer, should suitably determine according to sheet resistance value and light penetration, but generally be preferably 400nm～5 μ m about.From the angle of sheet resistance value and light penetration, preferred thickness is 500nm～2 μ m.Thickness during less than 400nm sheet resistance value increase, and thickness is when surpassing 5 μ m, because the light absorption of electric conductive polymer makes light penetration reduce.
Touch panel, because with a friction surface, therefore surface scratch easily.Therefore preferred one side at least at the composite conductive base material is provided with surface cure layer (D).Because wiping the outer surface of drawing with pen is the opposing face of the face that is provided with transparency conducting layer (B)/dielectric layer (C) of base material (A), therefore surface cure layer (D) preferably is set on this face, presses the sequential cascade of surface cure layer (D)/base material (A)/transparency conducting layer (B)/dielectric layer (C).In addition, the two sides that also can be chosen in base material (A) is provided with structure surface cure layer (D), surface cure layer (D)/base material (A)/surface cure layer (D ')/transparency conducting layer (B)/dielectric layer (C).
This surface cure layer (D) preferably has the above hardness of pencil hardness 1H.The material of surface cure layer (D) can be that inorganic compound also can be an organic compound, but considers more preferably organic compound from the viewpoint with flexibility.As the composition of surface cure layer, can enumerate heat reactive resin or the ionizing radiation cured resin that is cured by high energy radiation exposures such as electron ray, ultraviolet rays etc.For example can preferably enumerate (methyl) acrylate, alkoxysilane compound containing trialkylsilyl group in molecular structure, titanate compound of melamine resin, epoxy resin, pentaerythritol triacrylate and acrylic ester alcohol modification polyfunctional compound etc. etc.Especially (methyl) acrylate that is cured by the ionizing radiation irradiation owing to the hardness height, and has flexibility, is preferred composition as surface cure layer (D) therefore.For example, as the composition of such cured resin, can enumerate the spy and open that flat 12-141556 communique, spy are opened flat 13-179902 communique, the spy opens the resin combination described in flat 13-287308 communique etc.
In touch panel, usually use transparent conductive film as upper electrode, use conductive glass as lower electrode.Composite transparent conductive substrate of the present invention, being used as upper electrode is the occasion of transparent conductive film, can make the touch panel of anti-illustrative and high-temp resisting high-humidity resisting excellence.In addition, recently as the touch panel that is used for portable equipment etc., the occasion of composite transparent base material of the present invention as two electrodes up and down used in the exploitation of discussing slim touch panel, can make the touch panel of thin and light excellence.
Embodiment
[evaluation method]
1. dielectric constant
It is in the solvent of main solvent that organic polymer to be determined is dissolved in the dimethyl formamide, and this solution coat is made dry thickness on glass plate be 0.5mm, and dry solidification is 3 minutes in 150 ℃ baking oven, has made plate tensile sample.It is square that the plate tensile sample that makes is cut into 40mm, is that electrode is installed on the dielectric constant determinator DT-002 of キ one コ system system with plane-table operation with electrode DPT-008, and electrode is clamped sample, applies frequency 1kHz, voltage 1.0V under 20 ℃ temperature
DCVoltage, measure according to JIS C6484-1986 standard.
2. sheet resistance value
According to JIS K7194-1994 standard, use the low-resistivity meter ロ レ ス MCP-T360 of ダ イ ヤ イ Application ス Star Le メ Application Star system, adopt 4 sonde methods to measure.The electrode of 4 needle-likes is placed on the dielectric layer of composite transparent base material to be determined as the crow flies, and the constant current that circulates between two probes in the outside is measured the potential difference that produces between two inboard probes, obtains resistance by calculating.Have again, measure the occasion of the sample of not establishing dielectric layer, on transparency electrode, place electrode.
3. total light penetration
It is square that the composite transparent base material is cut into 40mm, according to JIS K7105-1981 standard, use Japanese electric look corporate system Haze Mater NDH-2000, utilize the D65 light source to measure.
4.b value
It is square that the composite transparent base material is cut into 40mm, according to JIS K7105-1981 standard, use ス ガ testing machine corporate system SM-6 type SM color computer, utilize the D65 light source to adopt transmission beam method to measure.
5. the evaluation of the resistance value stability under hot and humid
The composite transparent base material was put into 60 ℃, the high wet sump of constant temperature of 90%RH 240 hours.Adopt above-mentioned 2. evaluation method to measure to put into the sheet resistance value R before the high wet sump of constant temperature respectively
0, and put into after sheet resistance value R.Utilize ratio between two R/R
OThe stability of the resistance value of evaluation under hot and humid.R/R
OValue approach 1 more, the stability of the resistance value under hot and humid is excellent more.
6. by the evaluation of the resistance change of describing to cause
Fitting every the end on the surface of conductivity one side of the nesa glass (Nesa glass) (((strain)) touch-screen institute system) of particle at interband has the Copper Foil band of adhesive tape, the leading-out terminal of Y electrode and this electrode is set, as lower electrode (fixed electrode).Fitting in the end on the surface of conductive layer (B)/dielectric layer (C) side of transparent conductive base of the present invention has the Copper Foil band of adhesive tape, the leading-out terminal of X electrode and this electrode is set, as upper electrode (movable electrode).And then make upper electrode and lower electrode opposed by the mode that the surface of conductivity one side faces with each other, and by being attached to the two sides adhesive tape of end, establishing the gap of 80 μ m and fit, made the touch panel sample.This touch panel sample is arranged on the resistance membrane type touch panel testing fixture ((strain) touch-screen institute system), as shown in Figure 2 with the 2 parallel limits of upper electrode as the X electrode and the constant current I that circulates.In the position of distance end 2mm, go up employing at the surface cure layer (D) of transparent conductive base and apply a polyacetals pen load 300g, nib 0.8R, back and forth writing (describing) length with the speed of 210mm/ branch is the straight line of 20mm.Reciprocal 1 time be designated as describe 1 time, every the linearity of measuring resistance values for 1000 times.The linearity of so-called resistance value is called as linearity, calculates with following formula.
Linearity=(Δ E/E) * 100%
In the formula, E is that the two ends that will measure the straight line that terminals P describes are designated as X respectively
1And X
2The time, utilize connection to measure terminals P and be in X
1Voltage EX when last
1Be in X with the mensuration terminals P
2Voltage EX when last
2Straight line calculate, X
1And X
2Between arbitrfary point X
XThe voltage that calculates.Δ E
XAs shown in Figure 3, be an X
XThe E that calculates
XEX with practical measurement
XPoor.Utilize and connect X
1And X
2Straight line on the Δ E of maximum
X, obtain linear value by above-mentioned calculating formula.
So-called linear change amount is through describing for the 1st time and setting-out line setting-out line with whenever describing 1000 times poor, is that 1.5% the number of times of describing is described number of times as maximum with the linear change amount.It is big more then more little by the variation of the resistance value of describing to cause that maximum is described number of times.
Embodiment 1
Pet film (east beautiful (strain) system with thickness 125 μ m, trade name " Le ミ ラ one (registered trade mark) " QT59) be base material (A), use the contrary roll-coater of three-roller type to go up the coating paint and make that dried film thickness is 5 μ m at this base material (A) with the coating speed that 10m/ divides, described paint is to comprise six acrylic acid dipentaerythritol ester of 70 weight portions, the macromonomer AN-6S of 16 weight portions (solid constituent 50 weight %), styrene-propene acid copolymer (the solid constituent 60% of 20 weight portions, weight average molecular weight 17790), the surface cure resin dissolves of the acid imide acrylate (TO-1429) of 10 weight portions is in being the paint that obtains in the solvent of main solvent with toluene and methylethylketone.In baking oven, after the drying, use the high-pressure mercury-vapor lamp of the energy intensity of 100w/cm to shine, this surface cure resin crosslinks is solidified, make surperficial cured film.With the surface of the opposite side of surface cure layer (D) of this surface cure film on, use coiling type DC impulse method magnetic control sputtering device to form ito thin film (transparency conducting layer (B)) and also make that sheet resistance value is 400 Ω/.In addition, sputtering condition is to use ITO target (the sintering target (sintered density is more than 99%) of indium oxide (90 weight %) and tin oxide (10 weight %)), and exhaust in the sputter equipment is reached vacuum degree 4 * 10
-3Behind the Pa, importing oxygen is the Ar/O of 3.5mol%
2Gaseous mixture makes vacuum degree reach 4 * 10
-2Behind the Pa, carry out sputter with base material speed 3m/ branch.
Then on transparency conducting layer (B), use direct heliogravure head coating machine, dividing coating to be dissolved in the dimethyl formamide to be the cyanoethyl amylopectin (SHIN-ETSU HANTOTAI's chemical industry system) in the solvent of main solvent with coating speed 30m/ and making dried film thickness is 0.15 μ m, is provided with dielectric layer (C) thus.The dielectric constant of employed cyanoethyl amylopectin (SHIN-ETSU HANTOTAI's chemical industry system) is 19.Adopt above method to make the composite transparent conductive substrate for touch panel of the present invention of sequential cascade of the dielectric layer (C) of the transparent conductivity layer (B) of base material (A) by surface cure layer (D)/constitute by thin polymer film/constitute by ITO/constitute by the cyanoethyl amylopectin.Will be according to the table 1 that the results are shown in of above-mentioned evaluation method evaluation.
Used the touch panel of the composite conductive base material of embodiment 1, maximum is described number of times and is satisfied as describing more than 100,000 times of durability index, describes excellent in te pins of durability.
In addition, the jaundice of ITO sputtered film always improves light penetration and improves tone with regard to strong request.The composite conductive base material of embodiment 1 is compared with the composite conductive base material that does not have cyanoethyl amylopectin layer of comparative example 1 by stacked cyanoethyl amylopectin layer on the ITO sputtered film, and light penetration increases, and b
*Be worth also step-down.As previously discussed, touch panel of the present invention can be described as the also excellent better conductive substrate of optical characteristics with the composite conductive base material.
Comparative example 1
Except dielectric layer (C) was not set, operation had similarly to Example 1 made the composite transparent conductive substrate of sequential cascade of the transparent conductivity layer (B) of base material (A) by surface cure layer (D)/be made of thin polymer film/be made of ITO.The transparent conductive base that makes is estimated by above-mentioned evaluation method.Evaluation result is shown in table 1.
Embodiment 2
On the surface of surface cure layer (D) opposition side of the surface cure film that is made with embodiment 1, coating comprises the aqueous solution (solid component concentration 0.7%) (the Agfa-Gevaert N.V system of the electric conductive polymer of polyethylene dioxythiophene (PEDOT) and polystyrolsulfon acid (PSS), trade name: Orgacon (registered trade mark) N300 NEW) and to make dried thickness be 1.2 μ m, thus be provided with transparency conducting layer (B).Adopt the method identical to go up at transparency conducting layer (B) that to be coated with the cyanoethyl amylopectin and to make dried thickness be 0.12 μ m, thereby be provided with dielectric layer (C) with embodiment 1.Adopt above method to make the composite transparent conductive substrate of the present invention of sequential cascade of the dielectric layer (C) of the transparent conductivity layer (B) of base material (A) by surface cure layer (D)/constitute by thin polymer film/constitute by electric conductive polymer/constitute by the cyanoethyl amylopectin.Will be according to the table 1 that the results are shown in of above-mentioned evaluation method evaluation.
Used the touch panel of the composite conductive base material of embodiment 2, satisfied R/R as the resistance value stability indicator under hot and humid
0≤ 1.1, the excellent in stability of the resistance value under hot and humid.In addition, describe also excellence of durability.
Comparative example 2
Except dielectric layer (C) is not set, made the composite transparent conductive substrate of the transparent conductivity layer (B) of the base material (A) that comprises surface cure layer (D)/constitute by thin polymer film/constitute by electric conductive polymer similarly to Example 1.The transparent conductive base that makes is estimated according to above-mentioned evaluation method.Evaluation result is shown in table 1.
Embodiment 3
When dielectric layer (C) is set, use the acetylation amylopectin to replace the cyanoethyl amylopectin, in addition, made composite transparent conductive substrate similarly to Example 1.The dielectric constant of employed acetylation amylopectin is 16.To the results are shown in table 1 according to what above-mentioned evaluation method was estimated.
Embodiment 4
When dielectric layer (C) is set; replace the cyanoethyl amylopectin; use by weight 50%/50% and mix acetylation amylopectin (the former business system of woods) and cyanoethyl amylopectin (SHIN-ETSU HANTOTAI's chemical industry system) and the mixture that obtains; in addition, made composite transparent conductive substrate similarly to Example 1.By weight 50%/50% dielectric constant that mixes the occasion of acetylation amylopectin and cyanoethyl amylopectin is 17.Will be according to the table 1 that the results are shown in of above-mentioned evaluation method evaluation.
Table 1
| Sheet resistance value Ω/ | Total light penetration % | b *Value | (R/R 0) | Maximum is described number of times (ten thousand times) | |
| Embodiment 1 | 440 | 93 | -0.39 | 1.02 | 11 |
| Comparative example 1 | 410 | 86 | 2.95 | 1.01 | 0.5 |
| Embodiment 2 | 456 | 89 | 1.03 | 16 | |
| Comparative example 2 | 460 | 85 | 1.4 | 10 | |
| Embodiment 3 | 489 | 90 | 1.04 | 10 | |
| Embodiment 4 | 500 | 92 | 1.03 | 11 |
Utilizability on the industry
Can utilize composite transparent conductive substrate, described composite transparent conductive substrate is the important composition parts of the touch panel of necessary man-machine interface when being used as people's operation information equipment.
Claims (9)
1. composite transparent conductive substrate for touch panel, sequentially laminated have base material (A), transparency conducting layer (B) and a dielectric layer (C) that is made of thin polymer film or polymer sheet, dielectric layer (C) is that organic polymer more than 15 is made by the dielectric constant under 20 ℃ of temperature, frequency 1kHz, and the thickness of dielectric layer (C) is 40～2000nm.
2. composite transparent conductive substrate for touch panel as claimed in claim 1, wherein, dielectric layer (C) is made by the organic polymer that is selected from cyanoethylation polymer and acetylation amylopectin.
3. composite transparent conductive substrate for touch panel as claimed in claim 2, wherein, the cyanoethylation polymer comprises one or two or more kinds the organic polymer of selecting cyanoethylation polymer, cyanoethyl polyvinyl alcohol, cyanoethyl sucrose and the cyanoethyl D-sorbite of cyanoethylation polymer from cellulose-based polymer, starch based polymer.
4. composite transparent conductive substrate for touch panel as claimed in claim 2, wherein, dielectric layer (C) is made by the cyanoethyl amylopectin.
5. as each described composite transparent conductive substrate for touch panel of claim 1～4, wherein, the sheet resistance value of composite transparent conductive substrate is 100～1000 Ω/, and total light penetration of composite transparent conductive substrate is more than 80%.
6. as each described composite transparent conductive substrate for touch panel of claim 1～5, wherein, the base material that is made of thin polymer film or polymer sheet (A) is to be made by the resin that is selected from polycarbonate resin, acrylic resin, acetate resins, cyclic olefin resin and the mylar.
7. as each described composite transparent conductive substrate for touch panel of claim 1～6, wherein, transparency conducting layer (B) is that transparent conducting film or electric conductive polymer are made by metal.
8. as each described composite transparent conductive substrate for touch panel of claim 1～7, wherein, has surface cure layer (D) on the one side at least at base material (A).
9. a touch panel uses at least one side electrode of each described composite transparent conductive substrate for touch panel of claim 1～8 as upper/lower electrode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP237205/2004 | 2004-08-17 | ||
| JP2004237205 | 2004-08-17 | ||
| PCT/JP2005/014632 WO2006019019A1 (en) | 2004-08-17 | 2005-08-10 | Composite transparent conductive substrate for touch panel and touch panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1977343A true CN1977343A (en) | 2007-06-06 |
| CN1977343B CN1977343B (en) | 2010-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800214531A Expired - Fee Related CN1977343B (en) | 2004-08-17 | 2005-08-10 | Composite transparent conductive substrate for touch panel and touch panel |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4940949B2 (en) |
| KR (1) | KR20070042506A (en) |
| CN (1) | CN1977343B (en) |
| TW (1) | TWI376700B (en) |
| WO (1) | WO2006019019A1 (en) |
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| CN101488064B (en) * | 2008-01-15 | 2011-06-15 | 松下电器产业株式会社 | Touch panel, and movable contact unit and switch using the same touch panel |
| CN101452362B (en) * | 2007-12-07 | 2012-04-25 | 台达电子工业股份有限公司 | Touching control panel and its manufacture method |
| CN101728010B (en) * | 2008-10-31 | 2013-03-27 | 富士胶片株式会社 | Conductive film for touch screen and manufacturing method thereof |
| TWI449006B (en) * | 2011-10-05 | 2014-08-11 | Ind Tech Res Inst | Hybrid display device |
| CN101941316B (en) * | 2009-02-09 | 2015-11-25 | 住友化学株式会社 | The touch panel surperficial coated panel of stacked extruded resin sheet and touch panel |
| CN105164620A (en) * | 2013-03-29 | 2015-12-16 | 东友精细化工有限公司 | Transparent electrode pattern laminate and touch screen panel having same |
| CN105468184A (en) * | 2014-09-12 | 2016-04-06 | 东友精细化工有限公司 | Transparent electrode layer laminate and touch screen panel comprising same |
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| CN107329635A (en) * | 2016-04-28 | 2017-11-07 | 宸美（厦门）光电有限公司 | Conductive structure and contact panel |
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| JP4974071B2 (en) * | 2006-04-10 | 2012-07-11 | 東レフィルム加工株式会社 | Transparent conductive film for touch panel |
| TWI408576B (en) * | 2008-03-18 | 2013-09-11 | Cando Corp | Insulating layer of low capacitive property and touch sensor having the same |
| JP6270738B2 (en) * | 2012-12-19 | 2018-01-31 | 株式会社カネカ | Substrate with transparent electrode and manufacturing method thereof |
| CN108700806A (en) * | 2016-03-17 | 2018-10-23 | 东丽株式会社 | The manufacturing method of photosensitive conductive paste and substrate with conductive pattern |
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| JP2846887B2 (en) * | 1989-02-10 | 1999-01-13 | 日東電工株式会社 | Transparent conductive laminate |
| JP2665370B2 (en) * | 1989-03-01 | 1997-10-22 | 日東電工株式会社 | Transparent conductive laminate and method for manufacturing electroluminescent display device using the laminate |
| JP3146059B2 (en) * | 1992-04-07 | 2001-03-12 | 王子タック株式会社 | Transparent conductive film |
| JP3341277B2 (en) * | 1996-08-02 | 2002-11-05 | 王子製紙株式会社 | Transparent conductive film for electroluminescence device |
| JP3716537B2 (en) * | 1997-03-06 | 2005-11-16 | 東レ株式会社 | Transparent conductive laminate and EL device |
| JP4423515B2 (en) * | 1999-06-28 | 2010-03-03 | 東洋紡績株式会社 | Transparent conductive film and electroluminescence panel |
| EP1081633A2 (en) * | 1999-08-31 | 2001-03-07 | Daicel Chemical Industries, Ltd. | Touch panel and display device using the same |
| JP2003109432A (en) * | 2001-10-01 | 2003-04-11 | Bridgestone Corp | Transparent conductive film and touch panel |
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2005
- 2005-08-10 WO PCT/JP2005/014632 patent/WO2006019019A1/en active Application Filing
- 2005-08-10 JP JP2006531676A patent/JP4940949B2/en not_active Expired - Fee Related
- 2005-08-10 KR KR1020067025483A patent/KR20070042506A/en active Search and Examination
- 2005-08-10 CN CN2005800214531A patent/CN1977343B/en not_active Expired - Fee Related
- 2005-08-12 TW TW094127416A patent/TWI376700B/en not_active IP Right Cessation
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101452362B (en) * | 2007-12-07 | 2012-04-25 | 台达电子工业股份有限公司 | Touching control panel and its manufacture method |
| CN101488064B (en) * | 2008-01-15 | 2011-06-15 | 松下电器产业株式会社 | Touch panel, and movable contact unit and switch using the same touch panel |
| CN101728010B (en) * | 2008-10-31 | 2013-03-27 | 富士胶片株式会社 | Conductive film for touch screen and manufacturing method thereof |
| CN101941316B (en) * | 2009-02-09 | 2015-11-25 | 住友化学株式会社 | The touch panel surperficial coated panel of stacked extruded resin sheet and touch panel |
| TWI601639B (en) * | 2009-08-27 | 2017-10-11 | 住友化學股份有限公司 | Transparent resin laminate |
| TWI449006B (en) * | 2011-10-05 | 2014-08-11 | Ind Tech Res Inst | Hybrid display device |
| CN105164620A (en) * | 2013-03-29 | 2015-12-16 | 东友精细化工有限公司 | Transparent electrode pattern laminate and touch screen panel having same |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI376700B (en) | 2012-11-11 |
| JP4940949B2 (en) | 2012-05-30 |
| CN1977343B (en) | 2010-12-22 |
| WO2006019019A1 (en) | 2006-02-23 |
| JPWO2006019019A1 (en) | 2008-05-08 |
| TW200617997A (en) | 2006-06-01 |
| KR20070042506A (en) | 2007-04-23 |
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