KR101912583B1 - Film touch sensor, touch panel and image display device comprising the same - Google Patents
Film touch sensor, touch panel and image display device comprising the same Download PDFInfo
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- KR101912583B1 KR101912583B1 KR1020150163479A KR20150163479A KR101912583B1 KR 101912583 B1 KR101912583 B1 KR 101912583B1 KR 1020150163479 A KR1020150163479 A KR 1020150163479A KR 20150163479 A KR20150163479 A KR 20150163479A KR 101912583 B1 KR101912583 B1 KR 101912583B1
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- H01L27/323—
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Abstract
The present invention relates to a film touch sensor, a touch panel, and an image display apparatus including the same, and more particularly, An electrode pattern layer disposed on one side of the separation layer; And an optical film bonded to the other side of the separation layer through an adhesive layer, wherein the adhesive layer has a thickness of 0.1 to 5 占 퐉 and a surface energy ratio of the separation layer, the adhesive layer and the optical film is 1: 0.5 to 1.5: 0.5 To 1.5, which can remarkably reduce the generation of bubbles at each interface and reduce the defective rate due to the generation of bubbles, and an image display apparatus including the same.
Description
The present invention relates to a film touch sensor, a touch panel, and an image display apparatus including the same.
There have been attempts to introduce a touch input method into a wider variety of electronic devices while the touch input method is being watched as a next generation input method. Accordingly, research and development on a touch sensor capable of being applied to various environments and capable of accurate touch recognition are actively performed have.
For example, in the case of an electronic device having a touch-type display, an ultra-thin flexible display which achieves light weight, low power and improved portability has been attracting attention as a next generation display, and development of a touch sensor applicable to such a display has been required.
Flexible display means a display made on a flexible substrate that can bend, bend or twist without loss of properties, and technology development is underway in the form of flexible LCDs, flexible OLEDs, and electronic paper. In order to apply the touch input method to such a flexible display, a touch sensor having excellent flexing and restoring force and excellent flexibility and stretchability is required.
As a method for realizing such flexible display manufacturing, studies on film touch sensors have been actively conducted, and in order to prevent defects of the touch panel provided with the film touch sensor, it is desired to reduce the occurrence of bubbles at each interface of the film touch sensor Is required.
Korean Patent Laid-Open Publication No. 2015-0016901 discloses a light-emitting device comprising a base film, a first hard coat layer formed on one side of the base film, a first transparent conductive layer formed in a predetermined pattern on one side of the first hard coat layer, And a first extraction pattern formed in a predetermined pattern on the first transparent conductive pattern and having a light shielding property and a conductivity, wherein the first transparent conductive pattern and the extraction pattern are formed by patterning the first transparent conductive layer and the first Shielding conductive layer is obtained by patterning a light-shielding conductive layer. However, an alternative to the above-described problems has not been proposed.
An object of the present invention is to provide a film touch sensor capable of remarkably reducing the occurrence of bubbles at each interface of a film touch sensor by including a separation layer, an adhesive layer and an optical film having surface energy values within a specific numerical value range.
It is another object of the present invention to provide a touch screen panel including the above-mentioned film touch sensor and an image display apparatus including the touch screen panel.
1. separation layer;
An electrode pattern layer disposed on one side of the isolation layer; And
And an optical film adhered to the other side of the separation layer through an adhesive layer,
The thickness of the adhesive layer is 0.1 to 5 탆,
Wherein the adhesive layer, the separation layer, and the optical film have a surface energy ratio of 1: 0.5 to 1.5: 0.5 to 1.5.
2. The separator of claim 1, wherein the separating layer is selected from the group consisting of a polyimide-based polymer, a poly vinyl alcohol-based polymer, a polyamic acid-based polymer, a polyamide-based polymer, Based polymer, a polystyrene-based polymer, a polynorbornene-based polymer, a phenylmaleimide copolymer-based polymer, a polyazobenzene-based polymer, a polyphenylenephthalamide-based polymer, A polymer such as a polyester, a polymethyl methacrylate polymer, a polyarylate polymer, a cinnamate polymer, a coumarin polymer, a phthalimidine polymer, phthalimidine-based polymer, chalcone-based polymer, and aromatic acetylene-based polymer. Name touch sensor.
3. The film touch sensor of claim 1, wherein the separation layer is formed on and separated from the carrier substrate.
4. The film touch sensor according to 3 above, wherein the carrier substrate is a glass substrate.
5. The film touch sensor according to 1 above, wherein the electrode pattern layer is formed of at least one material selected from the group consisting of metal oxide materials, metals, metal nanowires, carbon-based materials, and conductive high-molecular materials.
6. The film touch sensor of claim 1, further comprising a first protective layer disposed between the separation layer and the electrode pattern layer.
7. The film touch sensor according to 1 above, wherein the surface energy of the separation layer is 30 to 80 mN / m, the surface energy of the adhesive layer is 20 to 70 mN / m, and the surface energy of the optical film is 40 to 90 mN / m.
8. The film touch sensor according to 1 above, wherein the surface energy of the separation layer is 40 to 70 mN / m, the surface energy of the adhesive layer is 20 to 60 mN / m, and the surface energy of the optical film is 50 to 80 mN / m.
9. The film touch sensor of claim 6, further comprising a second protective layer on the first protective layer on which the electrode pattern layer is disposed.
10. The film touch sensor of claim 9, further comprising an adhesive layer or an adhesive layer on the second protective layer.
11. The film touch sensor of claim 9, further comprising an optical film on the second protective layer.
12. The film touch sensor according to 11 above, wherein the optical film is a polarizing plate or a transparent film.
13. A touch screen panel comprising a film touch sensor of any one of claims 1 to 12.
14. An image display device comprising the touch screen panel of claim 13.
The film touch sensor of the present invention can suppress the occurrence of bubbles at each interface, thereby reducing the defective rate due to bubble generation.
1 is a schematic cross-sectional view of a film touch sensor according to an embodiment of the present invention.
FIGS. 2 to 8 are schematic views of a manufacturing process of a film touch sensor according to an embodiment of the present invention.
9 is an optical microscope photograph of a sample corresponding to the evaluation criterion? In the bubble generation experiment.
The present invention relates to a semiconductor device, An electrode pattern layer disposed on one side of the isolation layer; And an optical film adhered to the other side of the separation layer through an adhesive layer, wherein the adhesive layer has a thickness of 0.1 to 5 탆, a surface energy ratio of the separation layer, the adhesive layer and the optical film is 1: 0.5 to 1.5: 0.5 To 1.5, which can remarkably reduce the generation of bubbles at each interface and reduce the defective rate due to the generation of bubbles, and an image display apparatus including the same.
A film touch sensor according to an embodiment of the present invention includes a separation layer, an electrode pattern layer, an adhesive layer, and an optical film.
FIGS. 2 to 8 show a process for manufacturing a film touch sensor, and particularly, FIG. 1 is a cross-sectional view of a film touch sensor according to an embodiment of the present invention, and the present invention will be described in detail with reference to the drawings.
The
The
The
The surface energy of the
There is no particular limitation on the surface energy of the
The separating
The
The thickness of the
The
In an embodiment of the present invention, the
The conductive material forming the
The unit patterns of the
In addition, the
Further, the
When the
In the case of having a network structure, since signals are sequentially transmitted to adjacent patterns in contact with each other, a pattern having high sensitivity can be realized.
The thickness of the
If necessary, the film touch sensor of the present invention may further include a first
The first
As the first
The
The thickness of the first
If necessary, the film touch sensor according to an embodiment of the present invention may further include a second
The second
The second
The second protective layer may be a single layer or a plurality of layers of two or more layers.
When the second
As the second
When the second
The thickness of the second
The film touch sensor of the present invention includes an
The surface energy of the
The surface energy of the
The
Examples of the photo-radical polymerizable compound include ethyl acrylate, methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, butyl acrylate, isobutyl acrylate, allyl methacrylate, 2- (Meth) acrylate, hydroxypropyl (meth) acrylate, isopropyl (meth) acrylate, isopropyl (meth) acrylate, isopropyl (Meth) acrylate, stearyl (meth) acrylate, tetrapuryl (meth) acrylate, phenoxy (meth) acrylate, isobutyl Monofunctional monomers such as ethyl (meth) acrylate, octadecyl methacrylate, isobornyl (meth) acrylate, tetrahydrofuryl acrylate, and acryloylmorpholine; Butanediol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, bisphenol A- (Meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di Acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl (meth) acrylate, ethylene oxide modified phosphoric acid (meth) acrylate, tripropylene glycol di (meth) acrylate, neopentyl glycol di (Meth) acrylates such as di (meth) acrylate, bis (2-hydroxyethyl) isocyanurate di (meth) acrylate, di (acryloxyethyl) isocyanurate, allyl cyclohexyldi A bifunctional monomer such as trimethylolpropane diacrylate, neopentyl glycol-modified trimethylolpropane diacrylate, and adamantanediacrylate, such as dimethylolcyclohexane diacrylate, dimethylolcyclohexane diacrylate, dimethylolcyclohexane diacrylate, ; (Meth) acrylate such as trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri Trifunctional monomers such as tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, tris (acryloxyethyl) isocyanurate, glycerol tri ; Tetrafunctional monomers such as diglycerin tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, and ditrimethylol propane tetra (meth) acrylate; Pentafunctional monomers such as propionic acid-modified dipentaerythritol penta (meth) acrylate; And hexafunctional monomers such as dipentaerythritol hexa (meth) acrylate and caprolactone-modified dipentaerythritol hexa (meth) acrylate. These may be used alone or in admixture of two or more.
The acrylic oligomer may be an oligomer polymerized by incorporating at least one photo-radical polymerizable compound.
The photo radical polymerization initiator is not particularly limited, and examples thereof include radical photopolymerization initiators such as acetophenone, benzophenone, thioxanthone, benzoin and benzoin alkyl ether. These may be used alone or in combination of two or more.
Specific examples thereof include acetophenone, hydroxydimethylacetophenone, dimethylaminoacetophenone, dimethoxy-2-phenylacetophenone, 3-methylacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2- Methoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 4-hydroxycyclophenyl ketone, Propan-1-one, 4- (2-hydroxyethoxy) phenyl-2-methyl-1- - (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4-diaminobenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, anthraquinone, 2- Anthraquinone, 2-ethyl anthraquinone, 2-t-butyl anthraquinone, 2-amino anthraquinone, 2-methyl thioxanthone, 2-ethyl thioxanthone, 2-chlorothioxanthone, Oxanone, 2,4-diethylthioxanthone, benzoin, benzoin methyl ether, Benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, diphenyl ketone benzyl dimethyl ketal, acetophenone dimethyl ketal, p- 4,6-trimethylbenzoyldiphenylphosphine oxide, fluorene, triphenylamine, carbazole, and the like, but are not limited thereto.
The available products available on the market include darocur 1173, darocur 4265, darocur BP, darocur TPO, darocur MBF, iracacure 184, irgacure 500, irgacure 2959, irgacure 754, irgacure 651, irgacure 369, irgacure 907, irgacure 1300, irgacure 754, 819, irgacure 2022, irgacure 819DW, irgacure 2100, irgacure 784, irgacure 250, and the like. These may be used alone or in combination of two or more.
The content of the photopolymerization initiator is not particularly limited and may be, for example, 0.5 to 10 parts by weight based on 100 parts by weight of the photopolymerizable compound. When the content is within the above range, it has a proper curing rate and has excellent durability.
The thickness of the
The film touch sensor of the present invention includes a
The surface energy of the
The surface energy of the
The polymer constituting the
The thickness of the
In the film touch sensor of the present invention, the surface energy of the separation layer, the adhesive layer, and the optical film has a ratio of 1: 0.5 to 1.5: 0.5 to 1.5. When the surface energy ratio is within the above range, the adhesive composition can be smoothly applied at the time of forming the
The film touch sensor according to an embodiment of the present invention may further include an
As the
Further, the transparent film may be an isotropic film or a retardation film.
Nx and ny are the main indices of refraction in the film plane, nz is the refractive index in the film thickness direction, d is the film thickness) is 40 nm or less, and 15 nm And the retardation in the thickness direction (Rth, Rth = [(nx + ny) / 2-nz] xd) is from -90 nm to +75 nm, preferably -80 nm to +60 nm, desirable.
The retardation film is a film produced by the uniaxial stretching, biaxial stretching, polymer coating and liquid crystal coating method of a polymer film, and is generally used for improving the viewing angle of the display, improving the color feeling, improving the light leakage, do.
Further, a polarizing plate may be used for the optical film (90).
The polarizing plate may be one having a polarizer protective film attached on one side or both sides of a polyvinyl alcohol polarizer.
Further, a protective film may be used for the optical film (90).
The protective film may be a film including an adhesive layer on at least one side of a film made of a polymer resin, or a self-adhesive film such as polypropylene, and may be used for protecting the surface of the touch sensor and improving the process precision. If the protective film includes an adhesive layer or has a self-adhesive property, the
A flame treatment, a plasma treatment, an ultraviolet ray irradiation, a primer coating treatment, and a coating treatment are performed on the surface of the base film in order to improve the adhesion between the
The light transmittance of the
The thickness of the
The present invention also provides a touch screen panel including the film touch sensor, and an image display device including the touch screen panel.
The touch screen panel of the present invention is applicable not only to a conventional liquid crystal display but also to various image display devices such as an electroluminescence display device, a plasma display device, and a field emission display device. It can be particularly usefully applied to an image display device having a flexible characteristic.
The present invention also provides a method of manufacturing a film touch sensor.
FIGS. 2 to 8 are schematic views illustrating a manufacturing process of a film touch sensor according to an embodiment of the present invention. Hereinafter, a method of manufacturing the film touch sensor of the present invention will be described with reference to FIGS.
According to an embodiment of the present invention, a
As the
The
Preferably, the
The method of forming the
After the
The curing method of the
As the curing condition, for example, in the case of thermosetting, it can be carried out at 50 to 300 ° C for 1 minute to 60 minutes, preferably at 100 to 200 ° C for 5 to 30 minutes. In the case of photo-curing, UV irradiation at 0.01 to 10 J / cm 2 can be applied for 1 second to 500 seconds, preferably UV irradiation at 0.05 to 1 J / cm 2 for 1 second to 120 seconds, but the present invention is not limited thereto .
Thereafter, as shown in FIG. 3, the
The first
The first
4, when the first
The
The method of forming the
In the case of the unit pattern formation in the
In the photoetching method, a photoresist is coated on a layer to be patterned, the applied photoresist is selectively cured using a mask, the uncured photoresist is developed and removed, and then etched to form a pattern, And a pattern is formed through a series of processes known in the art for removing the cured photoresist.
In the case of a photoresist, it can be classified into a positive type photoresist and a negative type photoresist. In the case of a positive type, it is a photoresist which becomes soluble in a developing solution upon UV exposure. In the case of a negative type, it is insoluble Lt; / RTI >
Therefore, when a positive type is used, a portion exposed to UV can be developed, and a pattern can be formed through a subsequent process. In the case of a negative type, a portion not exposed to UV is developed, .
The conditions for curing the photoresist are not particularly limited. For example, UV of 0.01 to 10 J / cm 2 can be irradiated for 1 second to 500 seconds, preferably UV of 0.05 to 1 J / cm 2 for 1 second to It can be irradiated for 120 seconds.
According to an embodiment of the present invention, the method may further include forming a
The second
The second
In the case where the second
The
The polarizing plate may be one having a polarizer protective film attached on one side or both sides of a polyvinyl alcohol polarizer.
The
In order to improve the adhesion between the
Thereafter, the
The
According to an embodiment of the present invention, after the
The
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the invention and are not intended to limit the scope of the claims. It will be apparent to those skilled in the art that such variations and modifications are within the scope of the appended claims.
Example And Comparative Example
The composition described in the following Table 1 was applied on a soda lime glass having a thickness of 700 mu m so that the dry thickness became a corresponding thickness and cured to form a separation layer.
Thereafter, 15 parts by weight of ZAK-115 of Soken Chemical Co., Ltd., 4 parts by weight of a urea curing agent as a curing agent, 0.5 parts by weight of DIC F-554 and 0.5 parts by weight of Shin-Etsu KBM-403 as a polymer resin were mixed with propylene glycol monomethyl ether Acetate and a mixed solvent of 20 parts by weight of propylene glycol monomethyl ether was coated on the separating layer and cured at 180 캜 for 30 minutes to form a first protective layer having a thickness of 2 탆.
Then, an ITO layer having a thickness of 0.05 탆 was formed on the first passivation layer by a vacuum evaporation method, a photosensitive photoresist was applied on the ITO layer, and exposed, developed and etched to form an electrode pattern layer.
Thereafter, a positive photoresist (AZ LExp.S03-032, AGM Korea) was coated on the first protective layer on which the electrode pattern layer was formed, followed by curing and patterning to form a second protective layer having a thickness of 2 m, 2 A polyethylene terephthalate base material (base film) having a thickness of 38 탆 and an acrylic adhesive layer formed on the protective layer was attached.
Thereafter, the glass substrate was peeled off from the separating layer and the upper laminate in a temperature environment of 25 占 폚, the adhesive layer shown in Table 1 below was formed on the lower part of the separating layer, and the optical film of the following Table 1 was bonded to the lower part of the adhesive layer, A film touch sensor was fabricated.
In the case of the cycloolefin polymer (COP) film, the optical film was treated at a corona output of 500 mW and a treatment rate of 1.5 m / min to obtain a surface energy of 42 mN / m, a corona output of 600 mW and a treatment rate of 2.0 m / Was 59 mN / m.
The surface of the triacetyl cellulose (TAC) film was treated at a KOH concentration of 4.5 N, a solution temperature of 45 캜 and a treatment time of 65 seconds to treat the surface of the film with a surface energy of 74 mN / m, a KOH concentration of 4.5 N, The energy was 85 mN / m, the KOH concentration was 4.5 N, the liquid temperature was 45 캜, and the treatment time was 105 seconds to obtain a surface energy of 88 mN / m.
(A)
(B)
(C)
(탆)
(mN / m)
(탆)
(mN / m)
(탆)
(mN / m)
A-2: 5% of polyarylate (Unitica, M-2040), 95% of solvent cyclohexanone,
A-3: 1% of polyamic acid (Chemfield, T-100), 99% of solvent dimethylacetamide
A-4: Polymethyl methacrylate (Microchem, 495 PMMA A4)
A-5: 3% of polystyrene (Aldrich I, Mw 35,000), solvent toluene 97%
B-1: UV-NS063 (synthesized in Japan)
B-2: MA21 (Mei Sho)
B-3: SKA-BL80 (Shin Kwang Chemical Industry)
Experimental Example . Check for bubbles
The film touch sensors of Examples and Comparative Examples were observed with an optical microscope at an enlargement magnification of 100 times to confirm whether or not microbubbles were generated and evaluated according to the following criteria. FIG. 9 shows an optical microscope photograph of a sample corresponding to the evaluation criterion ?.
○: No fine bubbles
?: Slight microbubbles were slightly generated
X: Large amount of fine bubbles
Occur
Whether
Referring to Table 2, it can be seen that the film touch sensor of the present invention is particularly advantageous for reducing the generation of bubbles at the interface between the separation layer and the adhesive layer and at the interface between the adhesive layer and the optical film.
10: carrier substrate
20: Separation layer
30: First protective layer
40: electrode pattern layer
50: second protective layer
60:
70: Adhesive layer
80: Optical film
90: base film
Claims (14)
An electrode pattern layer disposed on one side of the isolation layer; And
And an optical film adhered to the other side of the separation layer through an adhesive layer,
The thickness of the adhesive layer is 0.1 to 5 탆,
Wherein the adhesive layer, the separation layer, and the optical film have a surface energy ratio of 1: 0.5 to 1.5: 0.5 to 1.5.
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