TWI668283B - Adhesive composition for touch screen panel, optical adhesive film and touch screen panel - Google Patents

Abstract

The present invention provides a binder composition comprising a (meth)acrylic acid ester-based photocurable resin and a non-oxygenated difunctional diene-based rubber curing agent.

Description

Binder composition for touch screen panel, optical adhesive film and touch screen panel

The invention provides an adhesive composition for a touch screen panel, an optical adhesive film and a touch screen panel.

Recently, electronic devices such as PDAs, mobile communication terminals, or navigators for vehicles have formed a large market. In the electronic device, the technical goals to be pursued are mainly thinning, light weight, low power consumption, high resolution, and high brightness.

On the other hand, an electronic device in which an input operation unit is provided with a touch screen or a touch panel switch uses a transparent conductive plastic film for weight reduction and crack prevention. As an example, there is a film in which a polyethylene terephthalate (PET) film is used as a substrate and a conductive layer such as indium tin oxide (ITO) is formed on one surface, and the film is adhered. The coupon layer is laminated on a conductive glass, a reinforcing material, a decorative film, or the like.

The above adhesive layer requires various physical properties such as touch sensitivity and durability.

An embodiment of the present invention provides an adhesive composition which is excellent in touch sensitivity and has excellent reliability.

Still another embodiment of the present invention provides light prepared from the above binder composition Learn to use adhesive film.

Another embodiment of the present invention provides a touch screen panel to which an optical adhesive film prepared from the above-described adhesive composition for a touch screen panel is applied.

In an embodiment of the present invention, there is provided a binder composition comprising a (meth) acrylate photocurable resin and an oxygen-free bifunctional diene rubber curing agent.

The divalent bifunctional group may be present at both ends of the above oxygen-free difunctional diene-based rubber curing agent.

For example, the above oxygen-free difunctional diene-based rubber curing agent may comprise a material selected from the group consisting of a bifunctional polybutadiene, a bifunctional isoprene rubber, and a bifunctional isobutylene-isoprene (isobutylene- Isoprene) A rubber, bifunctional styrene-butylene rubber, or the like, or a combination thereof.

The above non-oxygenated bifunctional diene rubber curing agent may have a weight average molecular weight of 3,000 to 20,000.

The dielectric constant k value measured by the above oxygen-free bifunctional diene rubber curing agent at a frequency of 100 kHz may be 2.1 to 2.5.

The present invention may comprise 100 parts by weight of the above (meth) acrylate-based photocurable resin and 0.1 to 2 parts by weight of the above-mentioned non-oxygenated difunctional diene-based rubber curing agent.

The above (meth) acrylate-based photocurable resin may be and contain a (meth) acrylate monomer and be selected from a hydroxyl group monomer, a carboxyl group monomer or a nitrogen-containing monomer and A resin in which at least one of the crosslinking monomers in the group consisting of a combination is copolymerized.

The above (meth) acrylate monomer may be an alkyl (meth) acrylate, and the alkyl group of the above alkyl methacrylate may be a linear or branched C1-C14 alkyl group.

The above (meth) acrylate monomer may comprise a solvent selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, and (meth) acrylate. N-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, (meth)acrylic acid T-butyl (meth)acrylate, sec-butyl (meth)acrylate, pentyl(meth)acrylate, (methyl) 2-ethylhexyl (meth)acrylate, 2-ethylbutyl(meth)acrylate, n-octyl methacrylate (meth) Acrylate), isooctyl(meth)acrylate, isobornyl(meth)acrylate,isononyl(meth)acrylate And one of a group consisting of them.

The crosslinking monomer may comprise a solvent selected from the group consisting of 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4 4-hydroxybutyl(meth)acrylate, 6-hydroxyhexyl(meth)acrylate, hydroxyoctyl 8-(meth)acrylate 8-hydroxyoctyl(meth)acrylate), 2-hydroxyethylene glycol (meth)acrylate, 2-hydroxypropylene glycol (meth) Acrylate),acrylic acid, methacrylic acid, 2-(meth)acryloxyacetic acid (2-(meth) Acrylyloxy acetic acid), 3-(meth)acryloyloxy propyl acid, 4-(meth)acryloyloxy butyric acid ), acrylic acid dimer, itaconic acid, maleic acid, 2-isocyanatoethyl (meth)acrylate, 3-(methyl ) 3-isocyanatopropyl (meth) acrylate, 4-isocyanatobutyl (meth) acrylate, (meth) acrylamide (meth) One of the group consisting of acrylamide), N-vinylpyrrolidone, N-vinylcaprolactam, and combinations thereof.

The above binder composition may further comprise a photoinitiator.

The photoinitiator may comprise a group selected from the group consisting of a benzoin-based initiator, a hydroxyketone-based initiator, an aminoketone-based initiator, caprolactam, and combinations thereof. One of the groups.

In still another embodiment of the present invention, there is provided an adhesive film for optics, wherein the optical adhesive film comprises an adhesive layer, and the adhesive layer comprises a photocured material of the adhesive composition.

In another embodiment of the present invention, a touch screen panel is provided, the touch screen panel includes: a conductive plastic film layer on one side of which a conductive layer is formed; and the optical adhesive film is laminated on an upper portion of the conductive layer; The cover window layer is laminated on the upper portion of the above-mentioned optical adhesive film.

The conductive plastic film may be a polyethylene terephthalate film in which a conductive metal oxide layer is formed on one surface.

The cover window may be a plastic film or tempered glass instead of transparent glass.

Sensitivity of optical adhesive film prepared from the above adhesive composition to touch Very good and has good reliability.

100‧‧‧ touch screen panel

110‧‧‧Optical adhesive film

131‧‧‧Plastic substrate layer

132‧‧‧ Conductive layer

130‧‧‧ Conductive plastic film

150‧‧‧cover window layer

160‧‧‧Transparent substrate

170‧‧‧Liquid Crystal Display Unit (LCD)

FIG. 1 is a schematic cross-sectional view of a touch screen panel according to an embodiment of the invention.

Hereinafter, embodiments of the invention will be described in detail. However, this is only an exemplification, and the present invention is not limited thereto, and the present invention is defined only in accordance with the scope of the patent application scope described later.

The present invention provides a binder composition comprising a (meth) acrylate photocurable resin and a non-oxygenated bifunctional diene rubber curing agent.

When preparing a touch screen panel of a display device such as a mobile phone or a tablet computer, a bonding medium used for bonding a conductive plastic film layer and a cover window layer on which a conductive layer is formed may be prepared from the above binder composition. Optical adhesive film.

The binder composition is photocured by the (meth)acrylate-based photocurable resin to form an optical adhesive film, and the optical adhesive film is optically transparent, and is applicable to a touch panel. Has a low dielectric constant. As such, the optical adhesive film having a low dielectric constant increases sensitivity to touch, and is thus usefully applied to a touch panel.

In the above binder composition, the non-oxygen-containing difunctional diene-based rubber curing agent as a substance having a low dielectric constant contributes to achieving a low dielectric constant of the above-mentioned optical adhesive film.

The above non-oxygenated bifunctional diene rubber curing agent has a low dielectric constant and, since it is bifunctional, acts as a (meth) acrylate photocurable when cured. Crosslinking between resins.

Specifically, a diene bifunctional group may be present at both ends of the above-mentioned non-oxygenated bifunctional diene rubber curing agent.

Since the above oxygen-free bifunctional diene-based rubber curing agent does not contain oxygen having high electronegativity, a low dielectric constant can be achieved as non-polarity.

As described above, since the above-mentioned oxygen-free bifunctional diene-based rubber curing agent has a bifunctional function, cross-linking action can be performed, but it is not trifunctional or higher. That is, since the above-mentioned oxygen-free bifunctional diene rubber curing agent is bifunctional, it is preferably combined with the above (meth)acrylate photocurable resin to prepare an adhesive film. This is because the (meth) acrylate-based photocurable resin has a certain degree of hardness after curing, and when the above-mentioned curing agent uses a trifunctional or higher polyfunctional compound, the cross-linked portion becomes long, and thus the adhesive film thus prepared is prepared. It is too hard and therefore not suitable as an adhesive film.

Therefore, the above-mentioned oxygen-free bifunctional diene-based rubber curing agent may not contain other functional groups except for the diene functional groups at both terminals.

The above non-oxygenated bifunctional diene rubber curing agent may have a weight average molecular weight of from about 3,000 to about 20,000. In other words, the diene rubber compound having the above-mentioned weight average molecular weight level as the above-mentioned oxygen-free bifunctional diene rubber curing agent may be in the form of a resin or an oligomer. The non-oxygenated bifunctional diene rubber curing agent having a weight average molecular weight in the above range may suitably function as a curing agent.

The dielectric constant k value measured at a frequency of 100 kHz of the above oxygen-free bifunctional diene rubber curing agent may be from about 2.1 to about 2.5.

The above non-oxygenated bifunctional diene rubber curing agent may comprise a bifunctional polybutadiene An alkene, a bifunctional isoprene rubber, a bifunctional isobutylene-isoprene rubber, a bifunctional styrene-butene rubber, or the like, or a combination thereof.

As such, the above-described binder composition for a touch screen panel can be prepared by having the above-mentioned oxygen-free bifunctional diene-based rubber curing agent in a manner having a low dielectric constant, specifically, at 100 kHz. It was prepared in such a manner that the dielectric constant k value measured under the frequency condition was 3.0 or less. The optical adhesive film prepared from the adhesive composition for a touch panel panel having a low dielectric constant is excellent in touch sensitivity.

The above binder composition may comprise about 100 parts by weight of the above (meth) acrylate-based photocurable resin and from about 0.1 to about 2 parts by weight of the above-mentioned non-oxygenated difunctional diene-based rubber curing agent.

The above (meth) acrylate-based photocurable resin may be in a group consisting of a (meth) acrylate monomer and a group selected from a hydroxyl group-containing monomer, a carboxyl group-containing monomer or a nitrogen-containing monomer, and a combination thereof. A resin in which at least one crosslinking monomer is copolymerized together.

Specifically, the (meth) acrylate monomer may be alkyl methacrylate, and the alkyl group of the above alkyl acrylate may be a linear or branched C1-C14 alkyl group.

The above (meth) acrylate monomer may be methyl (meth) acrylate, ethyl (meth) acrylate, or n-propyl (meth) acrylate ( N-propyl(meth)acrylate), isopropyl (meth)acrylate, n-butyl(meth)acrylate, tert-butyl (meth)acrylate T-butyl (meth)acrylate, sec-butyl (meth)acrylate, pentyl(meth)acrylate, (meth)acrylic acid 2 2-ethylhexyl(meth)acrylate, 2-ethylbutyl (meth)acrylate 2-ethylbutyl(meth)acrylate, n-octyl(meth)acrylate, isooctyl(meth)acrylate,isobornyl (meth)acrylate Isobornyl (meth)acrylate, isodonyl (meth)acrylate, and the like, or a combination thereof.

The above crosslinking monomer means a monomer which contains not only a copolymerizable functional group (for example, a carbon-carbon double bond) but also a functional functional group in a molecular structure.

For example, the above crosslinking monomer may include one selected from the group consisting of a hydroxyl group-containing monomer, a carboxyl group-containing monomer, or a nitrogen-containing monomer, and a combination thereof, and is not limited thereto.

Specifically, the crosslinking monomer may be hydroxyethyl 2-(meth)acrylate, hydroxypropyl 2-(meth)acrylate, hydroxybutyl 4-(meth)acrylate, 6-(meth)acrylic acid. a hydroxyl group-containing monomer such as hydroxyhexyl ester, hydroxyoctyl 8-(meth)acrylate, hydroxyethylene glycol 2-(meth)acrylate, hydroxypropyl propylene glycol 2-(meth)acrylate, etc. Acrylic acid, 2-(meth)acryloxyacetic acid, 3-(meth)acryloxypropyl acid, 4-(meth)acryloxybutyric acid, acrylic acid dimer, itaconic acid a carboxyl group-containing monomer such as maleic acid, isocyanoethyl 2-(meth)acrylate, isocyanopropyl 3-(meth)acrylate, or isocyanato 4-(meth)acrylate The nitrogen-containing monomer such as an ester, (meth) acrylamide, N-vinyl pyrrolidone, N-vinyl caprolactam or the like may include one selected from the group consisting of them.

The above binder composition may further contain a photoinitiator in order to adjust the degree of polymerization by the photocurable composition. The photoinitiator may be used in an amount of from about 0.01 to about 10 parts by weight based on 100 parts by weight of the above (meth)acrylate-based photocurable resin, as long as it can be produced by light irradiation. The radical is used to initiate the polymerization reaction, and is not particularly limited. For example, the photoinitiator may include a benzoin-based initiator, a hydroxyketone-based initiator, One of a group consisting of an aminoketone initiator, caprolactam, and a combination thereof.

Further, the above binder composition may further comprise, from the range of not impairing the effects of the invention, an epoxy resin, a crosslinking agent, a UV stabilizer, an antioxidant, a toner, a reinforcing agent, and a filler. One or more additives in the group consisting of an antifoaming agent, a surfactant, a plasticizer, and a combination thereof.

In another embodiment of the present invention, an adhesive film for optics is provided, and the optical adhesive film comprises a photocured product of the above binder composition.

After the binder composition for a touch panel is applied onto a substrate layer, it is photocured by light irradiation to prepare an optical adhesive film. "Light irradiation" refers to irradiation of electromagnetic waves that affect a photoinitiator or a polymerizable compound to initiate polymerization. In the above, electromagnetic waves are microwave, infrared, ultraviolet, X-ray and gamma rays, α-particle beams, and protons. A general term for a particle beam such as a proton beam, a neutron beam, and an electron beam.

The method of preparing the above-mentioned optical adhesive film by photocuring the above binder composition is not particularly limited. For example, the above-mentioned binder composition or a coating liquid prepared by adding a solvent thereto may be applied to a suitable program substrate and cured by a known unit such as a bar coater. Optical adhesive film.

After the bubble-initiating component of the volatile component or the reaction residue contained in the binder composition or the coating liquid is sufficiently removed, the curing process is performed, whereby the crosslinking density, molecular weight, modulus of elasticity, and the like of the cured product are appropriately imparted. Further, in the high temperature state, the bubble existing in the bonding interface is increased, and the problem of the disordered body is formed inside.

Further, the above binder composition or a method of curing the coating liquid thereof is not particularly limited. For example, the curing step can be carried out by a step of irradiating ultraviolet rays or aging under prescribed conditions through a coating layer formed by the above binder composition or a coating liquid thereof.

For example, the above photocuring can be performed by ultraviolet irradiation.

The ultraviolet irradiation for performing the above photocuring can be performed by a commonly used metal halide lamp for about 10 seconds to about 15 seconds.

The amount of light irradiated with the above ultraviolet rays is preferably from about 0.5 J/cm ² to about 2.0 J/cm ² , more preferably from about 1.0 J/cm ² to about 1.5 J/cm ² .

The above-mentioned optical adhesive film may have a thickness of from about 50 μm to about 300 μm. Specifically, the above-mentioned optical adhesive film may have a thickness of from about 100 μm to about 200 μm. In order to make the optical adhesive film have a thickness in the above range, it is possible to achieve an adhesive film excellent in durability, not only for a thin touch panel or a touch screen but also for a durable touch panel.

In another embodiment of the present invention, a touch screen panel is provided, the touch screen panel includes: a conductive plastic film layer on one side of which a conductive layer is formed; and the optical adhesive film is laminated on an upper portion of the conductive layer; The cover window layer is laminated on the upper portion of the above-mentioned optical adhesive film.

The cover window layer may be made of tempered glass or a plastic film instead of transparent glass which is developed as a substitute for the tempered glass. In the case of the above-described plastic film instead of the transparent glass, it is possible to form a plurality of functionalities in each layer in a multilayer structure.

FIG. 1 is a schematic cross-sectional view of the touch screen panel 100.

In the first embodiment, the touch screen panel 100 may include: a cover window layer 150; an optical adhesive film 110; a conductive plastic film layer 130; a conductive layer 132 formed on one surface of the plastic substrate layer 131; Substrate 160. And, including the touch screen surface of each layer as described above The board 100 can be attached to a display device such as a liquid crystal display device (LCD) 170 or the like.

The optical adhesive film 110 is a layer which is photocured by the above-described adhesive composition, and the optical adhesive film 110 is described in detail as described above.

The specific type of the conductive plastic film layer 130 is not particularly limited, and a known conductive film in the field can be used. For example, the conductive plastic film layer 130 may be a transparent plastic film in which an indium tin oxide electrode layer is formed as a conductive layer 132 on one surface. Specifically, the transparent plastic film forming the plastic substrate layer 131 may be a polyethylene terephthalate film, a polytetrafluoroethylene film, a polyethylene film, or a polypropylene film. , polybutene film, polybutadiene film, vinyl chloride copolymer film, polyurethane film, ethylene-vinyl acetate film, ethylene- An ethylene-propylene copolymer film, an ethylene-acrylic acid ethyl copolymer film, an ethylene-acrylic acid methyl copolymer film or a polyimide film Etc., but not limited to this. More specifically, the plastic substrate layer 131 may be a polyethylene terephthalate film.

Hereinafter, various specific embodiments of the present invention are proposed. However, the various embodiments described below are only intended to illustrate or illustrate the invention, and the invention should not be limited thereto.

Example 1

85 parts by weight of ethylhexyl acrylate and 15 parts by weight of hydroxypropyl acrylate as a crosslinking monomer were placed in a 1 liter glass reactor and thermally polymerized to obtain a viscosity of 35cP photocurable acrylic copolymer resin syrup. Calculated hydroxyl value relative to the above photocurable acrylic copolymer resin syrup It is 62 mgKOH/g. 0.5 parts by weight of a bifunctional butadiene rubber curing agent was mixed with respect to 100 parts by weight (based on solid content) of the photocurable acrylic copolymer resin, and 0.5 parts by weight of a, a-methoxy group was mixed. -a-methoxy-a-hydroxyacetophenone (Igacure 651, Ciba) as a photoinitiator and mixing 0.35 parts by weight of 1,6-hexan After the diol diacrylate (HDDA, 1,6-hexanediol diacrylate) was used as a crosslinking agent, the binder composition was prepared by thorough stirring. Next, the above binder composition was formed into a film at a thickness of 100 μm to be photocured, whereby an optical adhesive film was prepared using a cured film.

Example 2

A photocurable acrylic copolymer resin syrup was prepared in the same manner as in Example 1, and 2.0 parts by weight of a bifunctional butadiene rubber was used with respect to 100 parts by weight of the obtained photocurable acrylic copolymer resin. An adhesive film for optics was prepared in the same manner as in Example 1 except for the curing agent.

Comparative example 1

A photocurable acrylic copolymer resin syrup was prepared in the same manner as in Example 1 and used in place of the difunctional butadiene rubber curing agent in 100 parts by weight of the obtained photocurable acrylic copolymer resin. An optical adhesive film was prepared in the same manner as in Example 1 except that 0.5 part by weight of a bifunctional urethane curing agent was used.

Comparative example 2

A photocurable acrylic copolymer resin syrup was prepared in the same manner as in Example 1 and used in place of the difunctional butadiene rubber curing agent in 100 parts by weight of the obtained photocurable acrylic copolymer resin. 2.0 parts by weight of bifunctional urethane cured An adhesive film for optics was prepared in the same manner as in Example 1 except for the above.

Evaluation

Experimental Example 1: Evaluation of Dielectric Constant

The dielectric constant k value was measured after the electrodes were brought into contact with both surfaces of the optical adhesive films prepared in the above-mentioned Example 1 - Example 2 and Comparative Example 1 - Comparative Example 2 according to the following equipment and the following conditions, and recorded. In the following list 1.

Equipment: Agilent Technologies E4980ALCR Tester

Test Frequencies: 20Hz-2MHz

Electrode diameter: 5mm

Experimental example 2

The optical adhesive film prepared in the above Example 1 - Example 2 and Comparative Example 1 - Comparative Example 2 was used to prepare a laminated structure of glass/adhesive film/glass, and then in a constant temperature and humidity machine (85 ° C / 85% RH) After being placed for 3 days, it was confirmed with the naked eye whether or not bubbles were generated.

Experimental example 3

The optical adhesive film prepared in the above Example 1 - Example 2 and Comparative Example 1 - Comparative Example 2 was used to prepare a laminated structure of glass/adhesive film/glass, and (-40 ° C, 1 hour / 80 ° C, One hour) was performed for one cycle, and after 30 cycles, it was confirmed with the naked eye whether or not bubbles were generated, and is described in Table 1 below.

Table 1

As shown in the above Table 1, it was confirmed that bubbles were generated in Comparative Example 1, and the dielectric constant in Comparative Example 2 was relatively high, but no bubbles were generated in Example 1 - Example 2, indicating excellent reliability, and A low dielectric constant is achieved.

The preferred embodiments of the present invention have been described above in detail, but the scope of the invention is not limited thereto, and the basic concepts of the present invention defined in the following claims are to be Various modifications and improvements made are also within the scope of the patent application of the present invention.

Claims (12)

A binder composition comprising: 100 parts by weight of a (meth)acrylic acid ester-based photocurable resin and 0.5 to 2 parts by weight of an oxygen-free difunctional diene-based rubber curing agent Wherein the above-mentioned non-oxygenated bifunctional diene rubber curing agent has a diene bifunctional group at both ends, and the above oxygen-free bifunctional diene rubber curing agent comprises a polybutadiene selected from the group consisting of One of a group consisting of a functional isoprene rubber, a bifunctional isobutylene-isoprene rubber, and a combination thereof, and the above-mentioned oxygen-free bifunctional diene rubber curing agent The weight average molecular weight is from 3,000 to 20,000. The binder composition according to claim 1, wherein the non-oxygenated bifunctional diene rubber curing agent has a dielectric constant k of 2.1 to 2.5 as measured at a frequency of 100 kHz. The binder composition according to claim 1, wherein the (meth) acrylate photocurable resin is a monomer comprising (meth) acrylate and is selected from a hydroxyl group. A resin in which a crosslinking monomer of at least one of a group consisting of a body, a carboxyl group monomer, or a nitrogen-containing monomer and a combination thereof is copolymerized together. The binder composition according to claim 3, wherein the (meth) acrylate monomer is alkyl (meth) acrylate, and the alkyl group of the above alkyl methacrylate (alkyl) is a linear or branched C1-C14 alkyl group. The binder composition according to claim 3, wherein the (meth) acrylate monomer comprises a group selected from the group consisting of methyl (meth) acrylate and (meth) acrylate. Ethyl (ethyl) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, (a) N-butyl(meth)acrylate, t-butyl(meth)acrylate,sec-butyl(meth)acrylate ), pentyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 2-ethylbutyl (meth)acrylate ( 2-ethylbutyl(meth)acrylate), n-octyl(meth)acrylate, isooctyl(meth)acrylate,isobornyl (meth)acrylate One of the group consisting of isobornyl (meth)acrylate, isodonyl (meth)acrylate, and combinations thereof. The binder composition according to claim 3, wherein the crosslinking monomer comprises a group selected from the group consisting of 2-hydroxyethyl (meth)acrylate, 2-(A) 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl(meth)acrylate, 6-hydroxyhexyl 6-hydroxyhexyl (meth)acrylate), 8-hydroxyoctyl (meth)acrylate, 2-hydroxyethylene glycol (meth)acrylate, 2 2-hydroxypropylene glycol (meth)acrylate, acrylic acid, methacrylic acid, 2-(methyl)acryloxyacetic acid (2-(meth) )acryloyloxy acetic acid), 3-(meth)acryloyloxy propyl acid, 4-(meth)acryloyloxy butyric Acid), acrylic acid dimer, itaconic acid, maleic acid, 2-isocyanatoethyl (meth)acrylate, 3-(A) Acrylic Yl ester (3-isocyanatopropyl (meth) acrylate), 4- (meth) acrylate, iso-butyl cyano (4-isoc Yanatobutyl(meth)acrylate), (meth)acrylamide, N-vinylpyrrolidone, N-vinylcaprolactam, and combinations thereof One of the groups. The binder composition of claim 1, further comprising a photoinitiator. The binder composition according to claim 7, wherein the photoinitiator comprises a benzoin-based initiator, a hydroxyketone-based initiator, and an aminoketone. One of a group consisting of an initiator, caprolactam, and combinations thereof. An optical adhesive film comprising: an adhesive layer comprising the photocured material of the adhesive composition according to any one of claims 1 to 8. A touch screen panel comprising: a conductive plastic film layer having a conductive layer formed on one surface; the optical adhesive film according to claim 9 laminated on an upper portion of the conductive layer; and a cover window layer laminated on The upper portion of the above-mentioned optical adhesive film. The touch screen panel according to claim 10, wherein the conductive plastic film layer is a polyethylene terephthalate film having a conductive metal oxide layer formed on one surface thereof. The touch screen panel of claim 10, wherein the cover window layer is a plastic film or tempered glass instead of transparent glass.