KR101540803B1 - Touch Screen Panel and Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to a touch screen panel and a method for manufacturing the same. A sensing electrode of a metal mesh shape is formed through a nanoimprint process when the touch screen panel is manufactured, and a hydrophilic coating layer is formed on an inner surface of a trench and a water-based dispersion ink which has hydrophilicity is applied to a conductive material filled in the trench when the sensing electrode is formed. Therefore, a filling rate of the conductive material with respect to the trench can be improved in order to enable a filing work of the conductive material to be more rapidly and easily performed. Moreover, a process can be simplified since there is no need to repeat a hardening work of the conductive material in multiple times and can reduce manufacturing time and costs.

Description

TECHNICAL FIELD [0001] The present invention relates to a touch screen panel,

The present invention relates to a touch screen panel and a method of manufacturing the same. More particularly, the present invention relates to a method of forming a sensing electrode in the form of a metal mesh through a nanoimprint process in the manufacture of a touch screen panel, forming a hydrophilic coating layer on the inner surface of the trench in the process of forming the sensing electrode, The water-based dispersion ink of hydrophilic nature can improve the filling rate of the conductive material with respect to the trench. Accordingly, it is possible to perform the filling operation of the conductive material more quickly and easily. In addition, The present invention relates to a touch screen panel and a manufacturing method thereof that can simplify a manufacturing process and reduce manufacturing time and cost.

Personal computers, portable transmission devices, and other personal-purpose information processing devices perform text and graphics processing using various input devices such as a keyboard, a mouse, and a digitizer. These input devices are input devices as an interface according to the expansion of the use of PC, and it is difficult to cope with the product by only a keyboard and a mouse, and it is possible to input anybody while having a simpler and less erroneous operation, did. At present, much research has been conducted on reliability, new functions, durability, etc. beyond the level required to meet the general function of such input devices.

In particular, a touch screen panel is known as an input device capable of inputting characters without any other input device, and having a simple and less erroneous operation. Is also well known. The touch screen panel is classified into a resistive type, a capacitive type, an ultrasonic type, an optical (infrared ray) sensor type, and an electromagnetic induction type according to the operation type. Differences, differences in difficulty of design and processing technology, and so on. The criteria for selection are durability and economy as well as optical, electrical, mechanical, environmental, and input characteristics.

1 is a view for explaining an example of an electronic apparatus to which a conventional static capacitance type touch screen panel module is applied.

1, the touch screen panel module may be a portable electronic device such as a mobile communication terminal, a portable media player (PMP), a personal digital assistant (PDA), a navigation device, and an MP3 player as well as a television, a computer, a DVD player, , And a household appliance such as a washing machine. The electronic apparatus 1 includes a housing 11 constituting an external appearance of the electronic apparatus 1, a display unit 12 having a touch screen panel module mounted on the front surface of the housing, and an input key 13 ). The input key 13 may include a key that is frequently used separately from the touch screen panel module. Alternatively, the input key 13 may be removed and all inputs may be processed through the touch screen panel module.

The display unit 12 is a module for outputting an image related to the operation of the electronic device 1 to a user and can be implemented by a liquid crystal display (LCD), an organic light emitting display (OLED) have. A touch screen panel module is attached to the upper surface of the display unit 12 to receive input through a user's body or a stylus pen.

2 showing the exploded sectional view of the display unit, the display unit 12 includes a display unit 20 for outputting an image according to an electronic device to a user, a touch screen panel 20 disposed on the upper surface of the display unit 20, And a window 40 disposed on the upper surface of the module 10 and the touch screen panel module 10. The upper surface of the display unit 20 and the lower surface of the touch screen panel module 10 are adhered to each other by an adhesive layer (not shown), and the lower surface of the window 40 and the upper surface of the touch screen panel module 10 are adhered Are attached to each other. The image displayed on the display unit 20 is output to the user through the touch screen panel module 10 and the window 40. [

3 is a view for explaining the conventional static capacitance type touch screen panel module in more detail. The touch screen panel module senses the touch position through the user's body contact or the stylus pen contact and determines the contact position of the touch screen panel based on the touch position of the touch screen panel 30 which generates the touch position sensing signal And a flexible printed circuit board (not shown) having a control chip.

As shown in FIG. 3, the active area AR is located at the center of the touch screen panel 30, and the inactive area NAR is located along the periphery of the active area AR. Here, the active area AR refers to an area of the touch screen panel 30 that can detect a contact position using a user's body contact or a stylus pen. The inactive area NAR refers to a contact position sensed in the active area I.e., the area required to transmit the contact position sensing signal to the control chip.

In this touch screen panel 30, an active area AR and an inactive area NAR are formed on a transparent substrate 31. In the active area AR of the transparent substrate 31, A sensing electrode 33 is formed and a sensing electrode 33 formed in the active region AR is electrically connected to an external device such as a control chip (not shown) in the inactive region NAR of the transparent substrate 31. [ An electrode wiring 37 is formed. A transparent electrode material such as ITO (Indium Tin Oxide) material is mainly used for securing the transmittance and visibility of light generated from the display panel. The sensing electrode 33 is formed on the transparent substrate 31 through an etching process. And a material such as silver (Ag) or copper (Cu) is mainly used for the electrode wiring 37. The electrode wiring 37 is formed on the transparent substrate 31 through a printing exposure process.

At this time, the transparent electrode material such as ITO for forming the sensing electrode 33 is expensive because the indium used as the raw material is expensive as the rare earth metal. As a result, not only the price competitiveness is lowered but also the reserves are insufficient, .

In addition, the sensing electrode 33 and the electrode wiring 37 using the ITO material have a problem in that the manufacturing process is complicated and difficult, thereby increasing manufacturing time and cost. In addition, in recent years, a sensing electrode 33 having a finer and more complicated shape is required due to the tendency toward higher integration. However, the method using a transparent electrode material such as ITO has a limit to solve this problem.

In order to solve these problems, various researches on transparent electrode method to replace ITO have been carried out. However, research results on a new method applicable to touch screen panel and sensing electrode are still insignificant.

Korean Patent No. 10-1373606

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a sensing electrode of a metal mesh type through a nanoimprinting process in manufacturing a touch screen panel, The hydrophilic coating layer is formed on the side surface and the conductive material filling the trench is applied as a hydrophilic aqueous dispersion ink to improve the filling ratio of the conductive material to the trench, In addition, it is unnecessary to repeat the curing operation of the conductive material a plurality of times, thereby simplifying the process and reducing manufacturing time and cost, and a method for manufacturing the same.

It is another object of the present invention to provide a water-based dispersion ink which can prevent a decrease in electric conductivity occurring in the course of curing a conductive material, thereby improving the electrical characteristics of the sensing electrode, And a method of manufacturing the same.

Another object of the present invention is to provide a sensing electrode of a metal mesh type through a nanoimprint process, so that it is unnecessary to use a separate transparent electrode material such as ITO as a sensing electrode, thereby simplifying the process and reducing manufacturing cost The present invention also provides a touch screen panel capable of replacing an ITO material which is not smoothly supplied with a material and a manufacturing method thereof.

The present invention provides a touch screen panel manufacturing method for manufacturing a touch screen panel by forming a sensing electrode in the form of a metal mesh on a transparent substrate through a nanoimprinting process. The method comprises the steps of applying a transparent curing resin to the surface of the transparent substrate A resin application step; A trench forming step of press-curing the photocurable resin with a stamp mold having a mesh pattern to form the mesh-patterned trench in the photocured resin; A hydrophilic coating layer forming step of forming a hydrophilic coating layer on the inner surface of the trench; And forming a sensing electrode in the form of a mesh pattern by filling a conductive material containing metal particles in the trench in which the hydrophilic coating layer is formed, wherein the conductive material filling the trench in the sensing electrode formation step The present invention provides a method of manufacturing a touch screen panel, which is applied to an aqueous dispersion ink formed by dispersing metal particles in water.

At this time, the hydrophilic coating layer may be formed of a hydrophilic coating liquid in which the polar polymer material is dispersed in water.

The hydrophilic coating solution may be formed by dispersing any one of polyethylene glycol (PEG), polyvinyl alcohol (PVA) and polyvinyl acetate (PVAC) in water.

The hydrophilic coating layer forming step may include filling the trench with the hydrophilic coating liquid; And a vaporization step of irradiating light to the hydrophilic coating liquid filled in the trench to partially evaporate the hydrophilic coating liquid. In the vaporization step, the hydrophilic coating liquid is evaporated in the state of being left on the bottom surface and both sides of the trench, .

The filling step may include a first filling step of moving the filling squeegee in one direction to fill the hydrophilic coating liquid in a concentrated manner on the bottom surface and one side surface of the trench, and moving the filling squeegee in the other direction, And a second filling step of filling the bottom surface and the other side of the trench in a concentrated manner, and the evaporation step may be performed after the first filling step and after the second filling step, respectively.

Further, the aqueous dispersion ink may be formed in such a form that the transition metal having nanoparticles is dispersed in water.

The sensing electrode forming step may include filling the trench with the aqueous dispersion ink; And a curing step of irradiating light to the water-based dispersion ink filled in the trench and drying and curing the water-based dispersion ink, wherein the filling step may be repeated a plurality of times so that the aqueous dispersion ink is filled up to the set height in the trench.

Further, the curing step may be performed after the filling step is repeated a plurality of times.

On the other hand, the present invention relates to a transparent substrate having an active region and an inactive region; A light-curing resin of a transparent material disposed in a form to be applied to one surface of the transparent substrate and having trenches in the form of a mesh pattern formed on the surface thereof; A hydrophilic coating layer formed on an inner surface of the trench; And a sensing electrode filled with a conductive material containing metal particles in the trench of the photocurable resin and formed in the active region in the form of a mesh pattern along the trench, And the hydrophilic coating layer is filled on the inner surface of the trench.

At this time, the hydrophilic coating layer may be formed of a hydrophilic coating liquid in which the polar polymer material is dispersed in water.

The substrate may further include a plurality of electrode wirings formed in an inactive region of the transparent substrate so as to be connected to the sensing electrodes. The conductive wirings are filled with the conductive material in the trenches formed in the inactive regions, As shown in FIG.

According to the present invention, a sensing electrode in the form of a metal mesh is formed through the nanoimprinting process in manufacturing a touch screen panel, a hydrophilic coating layer is formed on the inner surface of the trench in the process of forming the sensing electrode, Based dispersion ink can improve the filling rate of the conductive material with respect to the trench. Accordingly, the charging operation of the conductive material can be performed more quickly and easily, and the curing operation of the conductive material can be performed in a large number It is not necessary to repeat the process repeatedly, so that the process can be simplified, and manufacturing time and cost can be reduced.

Further, by applying the conductive material as the water-based dispersion ink, it is possible to prevent a phenomenon of deterioration of the electric conductivity occurring during the process of curing the conductive material, thereby improving the electrical characteristics of the sensing electrode, It is effective.

In addition, by forming the sensing electrode in the form of a metal mesh through the nanoimprint process, it is unnecessary to use a separate transparent electrode material such as ITO as the sensing electrode, so that the process can be simplified, the manufacturing cost can be reduced, It is possible to replace the ITO material which is not supplied smoothly.

FIG. 1 is a view for explaining an example of an electronic device to which a conventional touch screen panel module according to the related art is applied.
FIG. 2 is a sectional exploded view of a display unit including a conventional touch screen panel module according to the related art,
3 is a schematic view illustrating an electrode pattern of a conventional touch screen panel according to the related art,
4 is a schematic view illustrating an electrode pattern of a touch screen panel according to an exemplary embodiment of the present invention.
5 is a cross-sectional view schematically showing an internal structure of a touch screen panel according to an embodiment of the present invention.
FIG. 6 conceptually illustrates a molecular model of a conductive material according to an embodiment of the present invention. FIG.
FIG. 7 is a view illustrating a filling state of a conductive material according to an embodiment of the present invention in comparison with the prior art,
FIG. 8 is a block diagram illustrating a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention,
FIG. 9 is a block diagram showing a detailed operation flow of the hydrophilic coating layer forming step according to an embodiment of the present invention. FIG.
FIG. 10 is a view showing a detailed operation flow of the sensing electrode forming step according to an embodiment of the present invention,
FIG. 11 is an operation flowchart illustrating a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention,
FIG. 12 is an operation flowchart showing a method of forming a hydrophilic coating layer of a touch screen panel according to an embodiment of the present invention,
13 is a flowchart illustrating a sensing electrode forming step of the touch screen panel according to an exemplary embodiment of the present invention in detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

4 is a schematic view illustrating an electrode pattern of a touch screen panel according to an exemplary embodiment of the present invention. FIG. 5 is a cross-sectional view schematically illustrating an internal structure of a touch screen panel according to an exemplary embodiment of the present invention. FIG. 6 is a conceptual diagram illustrating a molecular model of a conductive material according to an embodiment of the present invention, and FIG. 7 is a view illustrating a filling pattern of a conductive material according to an embodiment of the present invention, to be.

The touch screen panel 100 according to an embodiment of the present invention includes a transparent substrate 110 and a trench 102 formed on the surface of the toughened resin 101, The sensing electrode 120 is formed in the shape of a metal mesh. The sensing electrode 120 is formed in the transparent substrate 110 through the nanoimprint process.

First, the structure of the touch screen panel 100 according to an embodiment of the present invention will be described, and then a manufacturing method will be described.

The touch screen panel 100 according to an embodiment of the present invention is manufactured through a nanoimprint process as described above and includes a transparent substrate 110, a photocured resin 101, a hydrophilic coating layer 103, and a sensing electrode 120 ).

The active region AR is formed in the central portion of the transparent substrate 110 and the inactive region NAR is formed in the peripheral edge portion of the active region AR. A sensing electrode 120 is formed on the active region AR to sense a user's contact position and a contact position signal sensed through the sensing electrode 120 is provided to an electronic device such as a control chip An electrode wiring 130 for transferring is formed.

The sensing electrode 120 is formed in the active region of the transparent substrate 110 through the nanoimprint process in the form of a metal mesh and the electrode wiring 130 is similarly formed in the inactive region of the transparent substrate 110 through the nanoimprint process, . That is, the sensing electrode 120 and the electrode wiring 130 are formed in a mesh structure, and the mesh line constituting each mesh is formed of a conductive material containing metal particles, thereby forming a metal mesh structure of a metal material.

According to the nanoimprint process, the transparent substrate 110 is disposed on one surface thereof with a light curing resin 101 applied thereto. On the surface of the photocured resin 101, a trench 102 in the form of a concave valley is formed as shown in FIG. 5, and the path of the trench 102 forms a mesh structure that intersects with each other in the form of a mesh. At this time, the photocurable resin 101 is formed of a transparent material and has a characteristic of being cured by being exposed to ultraviolet light.

The conductive material M containing the metal particles is filled in the trench 102 of the photocured resin 101. The conductive material M is filled in the entire section along the trench 102 and then hardened, Similarly, a sensing electrode 120 in the form of a mesh pattern is formed in the active region of the transparent substrate 110. Similarly, the conductive material M is filled along the inactive region of the transparent substrate 110 along the trench 102, so that the electrode wiring 130 in the form of a mesh pattern is formed.

The hydrophilic coating layer 103 is formed on the inner surface of the trench 102 formed in the photocured resin 101. The hydrophilic coating layer 103 is formed of a hydrophilic coating liquid in which the polar polymeric material is dispersed in water. For example, the hydrophilic coating liquid is formed by dispersing in water one of polyethylene glycol (PEG), polyvinyl alcohol (PVA) and polyvinyl acetate (PVAC).

At this time, the conductive material M may be manufactured in the form of a paste or ink containing metal particles such as silver (Ag) or copper (Cu). According to an embodiment of the present invention, Based dispersion ink formed in a dispersed form. More specifically, it can be applied to an aqueous dispersion ink in which a transition metal having nanoparticles is dispersed in water.

According to this structure, the filling rate of the conductive material M with respect to the trench 102 is improved in filling the trench 102 with the conductive material M. In addition, the electrical conductivity of the sensing electrode is improved.

In more detail, the conductive material (M) is generally prepared by dispersing the metal particles (M1) in an organic solvent. In this case, when the metal particles (M1) are mixed and dispersed in the organic solvent, Is used. The conductive material in the form of the organic dispersion ink thus prepared is filled in the trench 102 and then dried and cured. As shown in FIG. 6 (a), a plurality of binder particles The metal particles M1 are prevented from mutual contact by the binder particles M2 and the electrical conductivity is lowered when the conductive material M is dried and cured.

The conductive material M according to an embodiment of the present invention is manufactured in the form of an aqueous dispersion ink in which the metal particles M1 are dispersed in a water-based solvent, that is, water. In this case, In the process of mixing and dispersing in water, a binder and various additives are used. As shown in FIG. 6 (b), unlike the organic dispersion ink type, the conductive material in the form of a water-based dispersion ink has a relatively small amount of binder particles M2 bonded to one metal particle M1 The mutual contact of the metal particles M1 is hardly disturbed by the binder particles M2 in a state where the conductive material M is dry-cured, so that the electrical conductivity is maintained in a good state.

When the conductive material M is applied as an aqueous dispersion ink, the conductive material M has a hydrophilic property. Since the photocurable resin 101 on which the trench 102 is formed is generally formed of an organic resin The conductive material M is not sufficiently filled in the trench 102 as shown in FIG. 7 (a) in the process of filling the conductive material M into the trench 102. That is, since the repulsive force is generated between the conductive material and the inner side surface of the trench in the portion where the conductive material M contacts the inner side surface of the trench 102, The filling of the conductive material with respect to the trench 102 as a whole is lowered. When the filling rate of the conductive material is lowered as described above, the conductive material must be repeatedly filled a plurality of times in such a manner that the conductive material is filled in small quantities in order to sufficiently fill the trenches. In this case, there is a problem that complete filling is very difficult.

Therefore, by forming the hydrophilic coating layer 103 on the inner surface of the trench 102 according to an embodiment of the present invention, the conductive material M and the trenches 102 are formed in the process of filling the trench 102 of the conductive material M The conductive material M is applied to the inner space of the trench 102 as a whole, as shown in FIG. 7 (b) And can be easily filled to a sufficient degree. Therefore, the number of times of the filling operation repeated many times in the filling process of the conductive material can be remarkably reduced, and in some cases, the filling operation can be completed by only one filling operation.

As described above, the sensing electrode 120 formed in such a manner that the conductive material M is filled in the trench 102 can be patterned with a very fine line width of several nanoseconds due to the nature of the nanoimprint process. The sensing electrode 120 can not be visually recognized and exhibits a transmittance equal to that of the transparent electrode material. Accordingly, when the sensing electrode 120 is formed with a mesh pattern having a fine line width, a transparent electrode of a new type replacing a transparent electrode material such as ITO can be formed.

According to such a structure, the touch screen panel 100 according to an exemplary embodiment of the present invention may include a metal mesh sensing electrode 120 through a nanoimprint process without using a separate transparent electrode material such as ITO as a sensing electrode, It is possible to simplify the process, reduce the manufacturing cost, and replace the ITO material which is not smoothly supplied with the material.

Particularly, by applying the conductive material (M) filled in the trench (102) as an aqueous dispersion ink in which metal particles are dispersed in water, it is possible to prevent a decrease in electric conductivity, which may occur in the drying and curing process of the conductive material And the hydrophilic coating layer 103 is formed on the inner surface of the trench 102. Thus, the filling operation of the conductive material M can be performed more quickly and easily.

Also in the case of the electrode wiring 130, the conductive material M is filled in the trench 102 of the photocured resin 101 through a nanoimprint process. In this case, Each electrode wiring 130 is formed into a mesh pattern. As a result, it is possible to form very fine patterns of several nanoseconds due to the nature of the nanoimprint process, thereby achieving a finer line width than the conventional exposure printing method. And the interval P between the electrode wirings 130 can be made smaller.

Accordingly, the touch screen panel 100 according to an embodiment of the present invention can more finely form the interval P of the electrode lines 130, so that the width of the inactive area NAR can be minimized, The space efficiency for the area AR can be improved. In the case of the electronic device using the same, the bezel area for the display part can be minimized, and space efficiency, design freedom and design effect can be further improved.

Meanwhile, when the sensing electrode 120 is formed as a metal mesh structure as described above, the display light located below the touch screen panel 100 is emitted to the outside through the touch screen panel 100, A sparkling phenomenon in which light shines out from outside may be caused by the conductive material (M) of the conductive layer 120.

In order to prevent the sparkling phenomenon, a separate blackening material (not shown) for preventing reflection of light may be disposed on the top and bottom surfaces of the sensing electrode 120, though not shown. The method of disposing the blackening material is such that the blackening material, the conductive material, and the blackening material are sequentially filled in the order of filling the conductive material M in the trench 102, As shown in FIG.

At this time, the blackening material may be formed of a conductive material for improving the electrical characteristics of the sensing electrode 120, and may be formed in a shape including any one of C, Mo, Cu ₂ O, Cr, Ta, .

By disposing the blackening material above and below the conductive material M, the light emitted from the external light source or the display light source is absorbed by the blackening material without being irregularly reflected by the sensing electrode 120, thereby preventing the sparkling phenomenon So that the quality of the touch screen panel can be kept better.

Next, a manufacturing method of the touch screen panel as described above will be described.

FIG. 8 is a block diagram illustrating a method of manufacturing a touch screen panel according to an exemplary embodiment of the present invention, and FIG. 9 is a flowchart illustrating a detailed operation flow for forming a hydrophilic coating layer according to an exemplary embodiment of the present invention. 10 is a view showing a detailed operation flow of a sensing electrode forming step according to an embodiment of the present invention, and FIG. 11 is a view illustrating a touch screen panel according to an embodiment of the present invention. FIG. 12 is a flowchart illustrating an operation sequence of a method of forming a hydrophilic coating layer of a touch screen panel according to an embodiment of the present invention, FIG. 13 is a flowchart illustrating an operation sequence of an embodiment And the sensing electrode forming step of the touch screen panel according to the first embodiment of the present invention.

A method of fabricating a touch screen panel according to an embodiment of the present invention includes forming a metal mesh sensing electrode 120 on a transparent substrate 110 through a nanoimprint process as described above. As shown in the figure, the method includes a resin application step S10, a trench formation step S20, a hydrophilic coating layer formation step S30, and a sensing electrode formation step S40.

The resin applying step S10 is performed by applying a transparent curing resin 101 of a transparent material to the surface of the transparent substrate 110 as shown in FIG. 11 (a). The photocurable resin 101 is applied in a viscous liquid phase state and then has a property of being cured as it is irradiated with ultraviolet light.

The trench forming step S20 is a step of forming a trench 102 in the form of a mesh pattern on the photocured resin 101 after the photocured resin 101 is coated on the surface of the transparent substrate 110, The stamp mold S having a pattern is formed and then the mesh pattern S1 formed on the stamp mold S is transferred to the photocurable resin 101. [ That is, as shown in FIG. 11 (b), the photocuring resin 101 is pressed against the stamp mold S having the mesh pattern S1 formed thereon. In this state, ultraviolet light is irradiated to the photocuring resin 101, The stamp mold S is separated and removed from the photocuring resin 101 as shown in Figure 11 (c) to form a mesh pattern-like trench 102 in the photocuring resin 101 .

The hydrophilic coating layer forming step S30 is performed in such a manner that the hydrophilic coating layer 103 is formed on the inner surface of the trench 102 formed in the photocured resin 101 as shown in FIG. 11 (d). 9, the hydrophilic coating layer forming step S30 includes a filling step S31 of filling the trench 102 with the hydrophilic coating liquid and a hydrophilic coating liquid filling the trench 102 to form the hydrophilic coating layer 103, And a vaporizing step (S32) in which the hydrophilic coating liquid is partially evaporated by irradiating light onto the substrate. At this time, in the evaporation step (S32), the hydrophilic coating liquid may be evaporated to remain on the bottom and both sides of the trench (102) by the bonding force.

More specifically, in the filling step S31, a separate filling squeegee 200 (see FIG. 12) is moved in one direction to fill the hydrophilic coating liquid into the bottom surface and one side surface of the trench 102 in a one- And a second filling step (S31-2) of filling the hydrophilic coating liquid on the bottom surface and the other side of the trench (102) by moving the filling squeegee (200) in the other direction At this time, the evaporation step S32 may be performed after the first filling step S31-1 and after the second filling step S31-2, respectively.

12, when the filling squeegee 200 is moved in the right direction as shown in FIG. 12 (a), the filling squeegee 200 applies the hydrophilic coating solution The hydrophilic coating liquid R is heavily filled in the right side surface from the bottom surface of the trench 102 along the moving direction of the filling squeegee 200. In this case, In this state, when the ultraviolet light is irradiated to the hydrophilic coating liquid R by operating the separate ultraviolet light lamp 300, the hydrophilic coating liquid R is partially evaporated. At this time, if the ultraviolet light irradiation intensity and time are adjusted , The hydrophilic coating liquid evaporates while remaining on the bottom surface and the right surface of the trench 102. That is, since the hydrophilic coating liquid has a bonding force as a polymeric material, the bonding state with the trench 102 is relatively strong in the portion contacting the bottom surface and the right side surface of the trench 102, and the evaporation is relatively easy in the central portion The central portion can be evaporated with the hydrophilic coating liquid remaining on the contact surfaces, that is, the bottom surface and the right surface, of the trench 102 by controlling the ultraviolet light irradiation intensity and time. 12 (a), when the hydrophilic coating liquid R is left on the bottom surface and the right surface of the trench 102 as shown in FIG. 12 (a), the evaporation step S32 is performed after the first filling step S31-1. Can be formed.

12 (b), when the filling squeegee 200 is moved in the leftward direction, the hydrophilic coating liquid R is filled in the trench 102 by the filling squeegee 200 in the same manner. The hydrophilic coating liquid R is heavily filled in the left side surface from the bottom surface of the trench 102 in accordance with the moving direction of the filling squeegee 200. In this state, when the ultraviolet light lamp 300 is operated in the same manner and ultraviolet light is irradiated to the hydrophilic coating liquid R, the hydrophilic coating liquid R remains in the bottom surface and the left surface of the trench 102, .

Accordingly, when the hydrophilic coating liquid is completely passed through the hydrophilic coating layer 103, the hydrophilic coating layer 103 is formed such that only the center portion of the hydrophilic coating liquid evaporates while remaining on the bottom surface, the right surface, and the left surface of the trench 102.

Since the hydrophilic coating layer 103 is formed as described above, the filling rate of the conductive material M with respect to the trench 102 can be improved in the sensing electrode forming step S40. That is, by forming the hydrophilic coating layer 103 on the inner surface of the trench 102, the repulsive force depending on the material characteristics is removed between the conductive material M and the inner surface of the trench 102 as described above, So that the conductive material M can be easily filled to a sufficient degree as a whole in the inner space of the trench 102, as shown in FIG. 7 (b). Accordingly, the number of times of the filling operation repeated many times in the filling process of the conductive material can be remarkably reduced.

The sensing electrode forming step S40 is performed by filling the conductive material M containing metal particles into the trench 102 formed with the hydrophilic coating layer 103 to form a sensing electrode 120 in the form of a mesh pattern . The conductive material M may be filled in the trench 102 by various methods such as spin coating. In accordance with an embodiment of the present invention, a bar-shaped squeegee (not shown) It can be applied in a filling manner. At this time, it is preferable that the moving direction of the squeegee and the direction of arrangement of the trenches 102 are set to be parallel to each other or obliquely crossing directions other than the right angle direction, and the filling rate of the conductive material M with respect to the trench 102, The speed can be improved in a harmonious manner.

In more detail, the conductive material M filling the trench 102 in the sensing electrode formation step S40 is applied as an aqueous dispersion ink in which metal particles are dispersed in water as described above. M does not cause a decrease in electrical conductivity during the drying and curing process as described above. Therefore, it is not necessary to repeatedly dry and harden the trench 102 in the process of filling the trench 102.

That is, since a conductive material in the form of an organic-based dispersion ink has a relatively large number of binder particles (M2) bonded to one metal particle (M1) as described above, It is necessary to repeatedly perform a process of filling a relatively small amount and then drying and curing it. In other words, the filling process is carried out in a small amount by a method of drying after first filling, second filling and then drying again. However, when the conductive material (M) is applied in the form of an aqueous dispersion ink according to an embodiment of the present invention, since the electrical conductivity is not lowered during the drying and curing process as described above, , And finally the drying and curing process is performed only once. In other words, after the first filling and the second filling operations are all completed, they can be carried out in a single drying process.

In summary, the sensing electrode forming step S30 according to an embodiment of the present invention includes a filling step S31 of filling a water-based dispersion ink into the trench 102 and a filling step S31 of applying light to the aqueous dispersion ink filled in the trench 102 And a curing step (S32) of irradiating and curing the ink. The filling step (S32) may be repeated a plurality of times to fill the water-based dispersion ink to the trench (102) to a set height. The filling step S32 is repeatedly performed because it is generally difficult to fill the conductive material up to the set height by only one filling operation. Therefore, it is necessary to fill the conductive material to the set height through repetitive filling operation Because. In this case, the curing step S32 may be performed after the filling step S31 is repeated many times. Particularly, the filling step S31 is repeated a number of times, so that the water-based dispersion ink is supplied to the trench 102 at a set height And may be configured to be performed only once after filling is completed.

For example, as shown in FIGS. 13A, 13B, and 13C, the filling step S31 is repeated to sequentially fill the conductive material M in the form of an aqueous dispersion ink to the trench 102 The conductive material M is dried by irradiating the ultraviolet lamp light 300 with ultraviolet light by operating the ultraviolet lamp light 300 after a plurality of charging steps S31 are repeatedly performed as shown in Figure 13 (d) It can be cured. That is, the curing step S32 is performed after the plurality of charging steps S31.

The hydrophilic coating layer 103 is formed on the inner surface of the trench 102 in the embodiment of the present invention. Therefore, as described above, since the hydrophilic coating layer 103 is formed on the inner surface of the trench 102, As the filling rate for the trenches 102 is improved, the conductive material M can be sufficiently filled up to the set height in the trenches 102 only once or twice.

Accordingly, in an embodiment of the present invention, when the conductive material M is filled in the trench 102 to form the sensing electrode, the conductive material M is filled with the conductive material M, The number of times of the dry curing process can be reduced to a degree that the dry curing process is repeated once or twice or three times as needed without repeating the dry curing process a plurality of times and the conductive material M to the trench 102 can be reduced, Filling operation of the trench 102 is also increased by the hydrophilic coating layer 103 formed on the inner surface of the trench 102, so that the number of operations can be reduced. Therefore, it is possible not only to simplify the process of forming the sensing electrode as a whole, but also to save time and cost.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: touch screen panel 101: photocured resin
102: Trench 103: Hydrophilic coating layer
110: transparent substrate 120: sensing electrode
130: electrode wiring 200: filling squeegee
300: ultraviolet light lamp R: hydrophilic coating liquid
AR: active area NAR: inactive area
M: Conductive material S: Stamp mold

Claims (11)

delete A touch screen panel manufacturing method for manufacturing a touch screen panel by forming a sensing electrode in the form of a metal mesh on a transparent substrate through a nanoimprint process,
A resin applying step of applying a light-curing resin of a transparent material to the surface of the transparent substrate;
A trench forming step of press-curing the photocurable resin with a stamp mold having a mesh pattern to form the mesh-patterned trench in the photocured resin;
A hydrophilic coating layer forming step of forming a hydrophilic coating layer on the inner surface of the trench; And
Forming a sensing electrode in the form of a mesh pattern by filling a conductive material containing metal particles in the trench in which the hydrophilic coating layer is formed,
Wherein the conductive material filling the trench in the sensing electrode forming step is applied as an aqueous dispersion ink formed by dispersing metal particles in water,
The hydrophilic coating layer is formed of a hydrophilic coating liquid in which a polar polymer material is dispersed in water,
The hydrophilic coating layer forming step
Filling the trench with the hydrophilic coating liquid; And
An evaporation step of irradiating light to the hydrophilic coating liquid filled in the trench to partially evaporate the hydrophilic coating liquid
, Wherein the filling step
A first filling step in which a separate filling squeegee is moved in one direction to fill the hydrophilic coating liquid on the bottom surface and one side surface of the trench in a biased manner;
And a second filling step of filling the hydrophilic coating liquid on the bottom surface and the other side of the trench in a concentrated manner by moving the filling squeegee in the other direction,
The evaporation step is performed after the first filling step and after the second filling step, respectively,
The evaporation step performed after the first filling step is performed to evaporate the hydrophilic coating liquid remaining on the bottom surface and one side surface of the trench by the bonding force,
The evaporation step performed after the second filling step is performed to evaporate the hydrophilic coating liquid remaining on the bottom and other sides of the trench by the bonding force,
The hydrophilic coating liquid is evaporated while remaining on the bottom and both sides of the trench through each of the evaporation steps to form the bonding strengthening layer on the inner surface of the trench,
The sensing electrode forming step
A filling step of filling the water-based dispersion ink in the trench; And
A curing step of irradiating the water-based dispersion ink filled in the trench with light to dry-cure
Wherein the filling step is repeated a plurality of times so that the aqueous dispersed ink is filled up to the set height in the trench,
Wherein the curing step is performed once after the filling step is repeated a plurality of times to fill the trench with the aqueous dispersion ink to a set height.
3. The method of claim 2,
Wherein the hydrophilic coating liquid is formed by dispersing one of polyethylene glycol (PEG), polyvinyl alcohol (PVA), and polyvinyl acetate (PVAC) in water.
delete delete The method according to claim 2 or 3,
The water-based dispersion ink
Wherein the transition metal having nanoparticles is dispersed in water.
delete delete delete delete delete

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