WO2014077638A1

WO2014077638A1 - Method for manufacturing touch panel sensor, and touch panel sensor

Info

Publication number: WO2014077638A1
Application number: PCT/KR2013/010432
Authority: WO
Inventors: 박철
Original assignee: (주)삼원에스티
Priority date: 2012-11-15
Filing date: 2013-11-15
Publication date: 2014-05-22

Abstract

A method for manufacturing a touch panel sensor for sensing a contact point of an object, comprises the steps of: providing a first laminated film including a first release film, a first release coating layer formed on the first release film, a first hard coating layer formed on the first release coating layer, and a window decoration provided on the first hard coating layer; enabling the first laminated film to tightly contact the upper glass substrate through a first flattening adhesive layer; removing the first release film so as to expose a first hard coating layer; and providing a first electrode pattern on the first hard coating layer. The first flattening adhesive layer for planarization, the first hard coating layer, and the window decoration are transferred on the upper glass substrate at one time.

Description

Manufacturing Method of Touch Panel Sensor and Touch Panel Sensor

The present invention relates to a method for manufacturing a touch panel sensor and a touch panel sensor, and more particularly, to a touch panel sensor capable of sensing a contact position of an object approaching a display.

1 is a perspective view illustrating a conventional capacitive touch panel sensor.

Referring to FIG. 1, in the conventional touch panel sensor, the lower insulating sheet 10 and the upper insulating sheet 20 are bonded to each other by a predetermined interval. The lower ITO electrode 30 and the upper ITO electrode 40 are vertically arranged on the opposite surfaces of the lower insulating sheet 10 and the upper insulating sheet 20, and specifically, the lower ITO electrode 30 is The upper surface of the lower insulating sheet 10 is oriented from left to right, and the upper ITO electrode 40 is oriented from the upper side to the lower side on the bottom surface of the upper insulating sheet 20.

The touch panel sensor has a predetermined capacitance, that is, a capacitance value corresponding to the area of each intersection point, at each intersection point of the lower ITO electrode 30 and the upper ITO electrode 40 disposed to cross each other. If a part is close, the area of the body part is added to the area of the upper ITO electrode 40 disposed thereon, and thus the capacitance value may be changed.

In addition, in order to electrically connect the upper ITO electrode 40 and the electrode 52 of the external circuit board 50, a connecting line 48 made of metal is formed from the end of the upper ITO electrode 40 from the upper insulating sheet 20. It extends to the bottom of the), the lower ITO electrode 20 is also connected to the circuit board 50 by a separate connection line. For reference, in FIG. 1, the lower ITO electrode 30 and the upper ITO electrode 40 are formed on the top and bottom surfaces of the lower insulating sheet 10 and the upper insulating sheet 20, respectively, but the positions thereof may be changed. For example, the lower ITO electrode may be formed on the bottom surface of the lower insulating sheet, and the upper ITO electrode may be formed on the upper surface of the upper insulating sheet.

In this case, the connecting line 48, which is generally provided as a metal, is shiny with metallic luster and does not pass through the light, so that the connecting line 48 may be visually confirmed on the upper portion of the transparent upper insulating sheet 20. Therefore, in the related art, a separate non-translucent film for window decoration 65 is formed on the bottom of the reinforcing substrate 60 such as glass or translucent reinforced plastic so that the connecting line 48 and the circuit board 50 are not visually checked. The reinforcing substrate 60 is disposed on the upper insulating sheet 20.

However, further providing a separate reinforcing substrate 60 on the upper insulating sheet 20 results in an increase in the thickness of the touch panel sensor, a disadvantage in that the assembly process is complicated, and an increase in the thickness of the touch panel sensor This may cause the transparency and clarity of the touch panel sensor to be degraded, and the sensitivity of the touch panel sensor may be reduced.

Therefore, recently, as shown in FIG. 5, the touch panel sensor disclosed in Publication No. 10-2011-0137231, referring to FIG. 5, a window decoration 45 is directly formed on the bottom surface of the upper insulating sheet 20, and the upper ITO electrode 40 is formed. ) May be formed.

However, such a structure is that when the upper ITO electrode 40 is bent at the boundary portion A, when the body part is in contact with the touch panel sensor, the upper ITO electrode 40 bends and deflects the upper insulating sheet 20 minutely up and down. It can easily cause breakage of the upper ITO electrode 40. Therefore, such a touch panel sensor process is not practically suitable for making a product.

The present invention provides a method of manufacturing a touch panel sensor and a touch panel sensor capable of improving the touch sensitivity by minimizing the thickness.

The present invention provides a method of manufacturing a touch panel sensor and a touch panel sensor that can minimize the possibility of damage to the upper ITO electrode provided on the bottom surface of the upper insulating sheet even by the refraction or external impact of the upper insulating sheet generated by the user's contact. to provide.

The present invention provides a method for manufacturing a touch panel sensor and a touch panel sensor capable of shortening the process time for manufacturing the touch panel sensor.

In particular, the manufacturing method of the touch panel sensor that can be provided in a liquid phase, such as spin coating of the components of the touch panel sensor, and can significantly reduce the time required for the finishing treatment of the component formed by curing treatment and Provides a touch panel sensor.

In addition, the present invention provides a method for manufacturing a touch panel sensor and a touch panel sensor capable of lowering a defective rate due to a position error occurring when the components of the touch panel sensor are bonded.

In addition, the present invention provides a method of manufacturing a touch panel sensor and a touch panel sensor capable of minimizing a defective rate of the touch panel sensor due to bubbles generated by using an adhesive layer when bonding the components of the touch panel sensor.

The present invention provides a touch panel sensor that can minimize the signal distortion of the touch panel sensor due to electromagnetic waves generated in the display.

According to an exemplary embodiment of the present invention, a method of manufacturing a touch panel sensor disposed on an upper display and sensing a contact position of an object approaching a display using an interaction of an electrode pattern may include a first release film and a first release film. Providing a first laminated film comprising a first release coating layer formed on a first release film, a first hard coating layer formed on a first release coating layer, and window decoration provided on the first hard coating layer; Adhering the first laminated film to the upper glass substrate through the first flat adhesive layer; Removing the first release film to expose the first hard coating layer; And providing a first electrode pattern on the first hard coating layer, wherein the first flat adhesive layer, the first hard coating layer, and the window decoration for planarization are transferred onto the upper glass substrate at one time. .

First, the first electrode pattern of the present invention is directly formed on the first flat hard coating layer without refraction to reduce breakage during use.

In addition, the thickness of the touch panel sensor may be reduced by providing a window decoration directly on the bottom surface of the first hard coating layer without using a separate reinforcement substrate having a window decoration on the top layer of the touch panel sensor.

Also, in general, the thickness of the plastic film provided with the electrode pattern is about 100 to 200㎛. This is because, in the related art, the electrode layer for the electrode pattern is laid and the electrode pattern is directly formed on the plastic film through a patterning process such as a photolithography process, and the thickness of the plastic film should be maintained at least 100 to 200 μm.

However, in the present invention, since the hard coating layer is provided on the release film, the hard coating layer is transferred to the upper glass substrate, and an electrode pattern is formed thereon, so that even if the thickness of the hard coating layer is thin, there is no problem in forming the electrode pattern. In fact, the thickness of the hard coating layer used in the present invention may have a thickness of 50 μm or less, and may be up to 5 μm. Therefore, the thickness of the touch panel sensor can be significantly reduced, which contributes to the improvement of the merchandise of the product by improving the sensitivity.

In addition, the first laminated film may be provided corresponding to at least one upper glass substrate, and may be cut and used corresponding to one upper glass substrate before being in close contact with the upper glass substrate.

In addition, the first laminated film provided corresponding to the at least one upper glass substrate may be in close contact with the glass ledger corresponding to the at least one upper glass substrate. Thereafter, the first laminated film and the glass ledger may be cut together to correspond to one upper glass substrate, and in this case, the first release film may be cut in a removed state.

In addition, a first wire member for connecting the first electrode pattern or the first electrode pattern and the controller may be formed on the first hard coating layer exposed by removing the first release film, and the glass ledger may be cut.

Of course, it is also possible to form a window decoration and a hard coating layer directly on the upper glass substrate of a predetermined size. However, in this case, when the liquid hardener for the hard coating layer is dropped and the liquid hardener is spread out to the outside of the upper glass substrate in the spin coating process, the touch panel sensor must be finished every time a touch panel sensor is made. Therefore, the processing time required for the finishing process is too long and the defective rate of the product is inevitably increased.

However, in the manufacturing method according to the present invention, since the first laminated film corresponding to the plurality of upper glass substrates is made and cut and used, a natural finishing process is performed in the cutting process.

As a result, a separate finishing process is not required, and the time required for finishing the components formed by spin coating, such as a hard coating layer on a release film and a flat adhesive layer that can be formed on the hard coating layer, can be drastically shortened. Can be.

On the other hand, in the case of the hard coating layer can be provided by applying and curing the curing agent on the release film, a PET film having a thickness of about 20㎛ or other synthetic resin film can be used directly on the release film.

In addition, since the first flat adhesive layer, the first hard coating layer, and the window decoration are transferred all at once on the upper glass substrate, it is possible to shorten the process time and minimize the defect rate caused by the position error that may occur when stacking one by one. . In addition, since the layers of the touch panel sensor are not bonded to each other using an adhesive layer, defects of the touch panel sensor due to bubbles are not generated.

In addition, the first hard coating layer is transferred to the upper glass substrate, and comprises a second release film, a second release coating layer formed on the second release film, and a second hard coating layer formed on the second release coating layer The second laminated film may be provided, and the second laminated film may be in close contact with the first hard coating layer having the first electrode pattern formed thereon through the second flat adhesive layer.

In addition, a second electrode pattern electrically interacting with the first electrode pattern may be formed on the second hard coating layer exposed by removing the second release film. Here, when the second release film is removed, the second release coating layer is preferably attached to the second release film and removed together.

On the other hand, by bonding a first laminated film corresponding to the glass ledger size, and removing the first release film to provide a first electrode pattern and a first wire member on the exposed surface of the first hard coating layer, the second laminate described above The film may be disposed on the second hard coat layer up to the second electrode pattern and the second wire member, and then the glass ledger may be cut to correspond to the upper glass substrate.

In addition, the second hard coating layer and the second release film may have a cutting pattern exposing an end portion of the first wire member for electrically connecting the first electrode pattern provided on the first hard coating layer and the external device. 1 After the second laminated film is in close contact with the hard coating layer may remove the second release film.

In addition, the first flat adhesive layer may include a liquid adhesive layer and an optically clear adhesive layer (OCA), wherein the liquid adhesive layer applies a liquid curing agent onto the first hard coating layer and window decoration, and then hardens the liquid curing agent. It may be provided by, and may be in close contact with the upper glass substrate through the optical adhesive layer.

In addition, the first flat adhesive layer may include a single layer liquid adhesive layer, and the single layer liquid adhesive layer may be provided by interposing a liquid curing agent between the first hard coating layer and the upper glass substrate and curing the liquid curing agent.

In addition, the first flat adhesive layer may include a first liquid adhesive layer and a second liquid adhesive layer, and the first liquid adhesive layer may be formed by applying a first liquid curing agent onto the first hard coating layer and window decoration, and then The second liquid adhesive layer may be provided by curing a curing agent, and the second liquid adhesive layer may be provided by interposing a second liquid curing agent, which is the same as or different from the first liquid curing agent, between the first liquid adhesive layer and the upper glass substrate, and curing the second liquid curing agent. Can be. For reference, the liquid curing agent may include a curing agent that is cured by heat or ultraviolet rays.

In addition, the first flat adhesive layer may include an optical adhesive layer, and may be in close contact with the upper glass substrate through the optical adhesive layer.

In addition, the first electrode pattern includes indium tin oxide (ITO) or indium zinc oxide (IZO), al-doped tin oxide (ATO), al-doped zinc oxide (AZO), and carbon nanotubes (CNT) having both transparency and conductivity. And the like, and may also be provided by applying a metal fiber solution and curing the metal fiber solution. For example, a curing agent solution having silver nanowires may be applied or printed and cured to provide a first electrode pattern.

In addition, a lower transparent film provided with a second electrode pattern under the first electrode pattern may be provided. In this case, the upper glass substrate and the lower transparent film may be bonded using a separate optical adhesive layer.

In addition, a lower glass substrate having a second electrode pattern provided below the upper glass substrate may be provided. In this case, a thickness of the lower glass substrate may be relatively thicker than a thickness of the upper glass substrate, which may occur due to electromagnetic waves of the display. Electrical signal distortion of the first electrode pattern can be minimized.

According to another exemplary embodiment of the present invention, the touch panel sensor disposed on the display to sense the contact position of the object, the upper glass substrate that is opposed to the upper display; A first flat adhesive layer disposed on the bottom surface of the upper glass substrate; Window decoration disposed on a bottom surface of the first flat adhesive layer; And a first hard coating layer formed on a bottom surface of the first flat adhesive layer and the window decoration. And a first electrode pattern formed on a bottom surface of the first hard coating layer, the first release film, the first release coating layer formed on the first release film, the first hard coating layer formed on the first release coating layer, and the first electrode pattern formed on the first release film. 1 transfer the first flat adhesive layer, the first hard coating layer, and the window decoration to the upper glass substrate at a time by using the first laminated film including the window decoration provided on the hard coating layer through the first flat adhesive layer. do.

In addition, according to another exemplary embodiment of the present invention, the manufacturing method of the touch panel sensor disposed on the display to detect the contact position of the object, the release film, the release coating layer formed on the release film, the release coating layer Providing a laminated film including a window decoration formed; Adhering the laminated film to the upper glass substrate through the flat adhesive layer; Removing the release film; And providing an electrode pattern on the laminated film to which the release film is removed and exposed, wherein the flat adhesive layer and the window decoration for planarization are transferred onto the upper glass substrate at one time.

In addition, the laminated film may further include an index matching coating layer formed on the release coating layer and the window decoration, it may provide an electrode pattern on the index matching coating layer exposed by removing the release film.

The manufacturing method of the touch panel sensor and the touch panel sensor of the present invention can reduce the thickness of the touch panel sensor by providing a window decoration directly on the bottom surface of the first hard coating layer without using a separate reinforcement substrate having a window decoration on the top layer. .

In addition, since the electrode layer for the electrode pattern is conventionally laid and the electrode pattern is directly formed on the plastic film through a patterning process such as a photolithography process, the thickness of the plastic film used in the conventional touch panel sensor is at least 100 to 200 μm. Had to be maintained.

However, in the method of manufacturing the touch panel sensor and the touch panel sensor of the present invention, since the hard coating layer is provided on the release film and the electrode pattern is formed thereon, there is no problem in forming the electrode pattern even if the thickness of the hard coating layer is thin. In fact, the thickness of the hard coating layer used in the present invention has a thickness of 50㎛ or less. Therefore, the thickness of the touch panel sensor can be greatly reduced, which contributes to the improvement of the merchandise of the product by improving the sensitivity.

In addition, in the manufacturing method of the touch panel sensor and the touch panel sensor of the present invention, since the first laminated film corresponding to the plurality of upper glass substrates is made and used, it is cut and used to achieve a natural finishing process in the cutting process. Therefore, a separate finishing process is not required, and thus the time required for finishing the components formed by spin coating, such as a hard coating layer on a release film, a flat adhesive layer that can be formed on the hard coating layer, and the like, can be significantly shortened.

In addition, in the method of manufacturing the touch panel sensor and the touch panel sensor of the present invention, since the first flat adhesive layer, the first hard coating layer, and the window decoration are transferred on the upper glass substrate at a time, the process time is shortened and stacked one by one. It is possible to minimize the failure rate caused by the position error that can occur when raising. In addition, the failure of the touch panel sensor due to the bubble generation does not occur because each layer of the touch panel sensor is not bonded with an adhesive.

In addition, the manufacturing method and the touch panel sensor of the present invention can provide a lower glass substrate provided with a second electrode pattern below the upper glass substrate, in this case, the thickness of the lower glass substrate of the upper glass substrate It is relatively thicker than the thickness to minimize the electrical signal distortion of the first electrode pattern generated by the electromagnetic waves of the display.

1 is a perspective view illustrating a conventional touch panel sensor.

2 is a cross-sectional view of the first laminated film bonded to the upper glass substrate in the touch panel sensor according to an embodiment of the present invention.

3 is a cross-sectional view illustrating a process of bonding the first laminated film to the upper glass substrate and removing the first release film to expose the first hard coating layer.

4 is a cross-sectional view of forming a first electrode pattern on a first hard coat layer.

5 is a front view and a cross-sectional view of a first laminated film manufactured to a size corresponding to a plurality of upper glass substrates.

FIG. 6 provides a second flat adhesive layer on the first hard coat layer on which the first electrode pattern is formed, bonds the second laminated film, and removes the second release film as shown in FIG. 4 to form the second hard coat layer. It is sectional drawing which shows the process of exposing.

7 is a cross-sectional view of forming a second electrode pattern on a second hard coating layer.

8 is a front view and a cross-sectional view of a second laminated film manufactured to a size corresponding to a plurality of upper glass substrates.

9 is a bottom view of the touch panel sensor of FIG. 7.

10 is a cross-sectional view of a touch panel sensor according to another embodiment of the present invention.

11 is a cross-sectional view of a touch panel sensor according to another embodiment of the present invention.

12 is a cross-sectional view of a laminated film for manufacturing a touch panel sensor according to another embodiment of the present invention.

13 is a cross-sectional view of a laminated film for manufacturing a touch panel sensor and an upper glass substrate to which the laminated film is bonded according to another embodiment of the present invention.

14 is a view for explaining a laminated film having a size corresponding to the glass ledger on a glass ledger corresponding to a plurality of upper glass substrates.

FIG. 15 is a view for explaining a process of forming an electrode pattern on a hard coating layer exposed by bonding the laminated film shown in FIG. 14 to an upper glass substrate and removing a release film.

16 is a view for explaining a process of providing a touch panel sensor by bonding the laminated film and the lower transparent film on which the electrode pattern is formed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by referring to the contents described in the other drawings under these rules, and the contents determined to be obvious to those skilled in the art or repeated may be omitted.

The present invention relates to a method of manufacturing a touch panel sensor for sensing a contact position of an object and a touch panel sensor provided through the manufacturing method, which will be described below with reference to FIGS. 2 to 9. The manufacturing method of the touch panel sensor according to the present invention will be described in detail.

2 is a cross-sectional view of the first laminated film bonded to the upper glass substrate in the touch panel sensor according to an embodiment of the present invention, Figure 3 is bonded to the first laminated film on the upper glass substrate, the first release film is removed 4 is a cross-sectional view illustrating a process of exposing the first hard coating layer, and FIG. 4 is a cross-sectional view of forming a first electrode pattern on the first hard coating layer, and FIG. 5 is made of a size corresponding to the plurality of upper glass substrates. 1 is a front view and a cross-sectional view of a laminated film, and FIG. 6 provides a second flat adhesive layer on a first hard coat layer on which a first electrode pattern is formed, as shown in FIG. 7 is a cross-sectional view illustrating a process of exposing a second hard coat layer by removing a release film, and FIG. 7 is a cross-sectional view of forming a second electrode pattern on a second hard coat layer, and FIG. 8 corresponds to a plurality of upper glass substrates. FIG. 9 is a front view and a sectional view of the second laminated film manufactured in size, and FIG. 9 is a bottom view of the touch panel sensor of FIG. 7.

First, FIG. 2 illustrates a first laminated film 120 for transferring the first flat adhesive layer 125, the first hard coating layer 123, and the window decoration 124 on the upper glass substrate 110 at one time. .

The first laminated film 120 has a first release film 121, a first release coating layer 122, a first hard coating layer 123, a window decoration 124, and a first flat adhesive layer from below, based on FIG. 2. 125 are stacked in order. As can be seen here, the window decoration 124 is not provided on a separate reinforcing substrate disposed on the uppermost layer as in the prior art, but is directly provided on the upper surface of the first hard coating layer 123 to reduce the thickness of the touch panel sensor.

In addition, as illustrated in FIG. 3, the first laminated film 120 is in close contact with the upper glass substrate 110 through the first flat adhesive layer 125. Thereafter, the first release film 121 may be peeled off from the first laminated film 120 to expose the first hard coating layer 123.

Then, as shown in FIG. 4, the first electrode pattern 140 is provided on the first hard coating layer 123. In this case, a separate primer treatment may be performed on the surface of the first hard coating layer 123 before the first electrode pattern 140 is formed so that the first electrode pattern 140 does not easily fall off the surface.

In addition, the first electrode pattern 140 may use ITO or IZO, ATO, AZO, carbon nanotubes, transparent organic materials, or the like, and may be provided by applying a metal fiber solution and curing the metal fiber solution. . For example, it may be provided by curing after applying or printing a curing agent solution having silver nanowires. Here, since the first electrode pattern 140 is provided on the flat first hard coating layer 123, even if a transparent conductive ceramic such as ITO is highly brittle, there is no refracting portion, thereby reducing the risk of breakage during use.

Meanwhile, the first electrode pattern may be electrically connected to the flexible circuit board by the first wire member, and the first wire member may be formed on the window decoration part using silver paste or thin film metal electrode.

For reference, a separate index matching coating layer may be first formed on the first hard coating layer, and the first electrode pattern and the first wire member may be provided. The coating layer may include a component that scatters light or matches the refractive index of the light similarly to the ITO electrode, such as silicon oxide or niobium oxide, and is formed on the first hard coating layer through the coating layer. The outline of the one electrode pattern is prevented from appearing outside. Alternatively, the first hard coating layer may be provided to match the refractive index with the first electrode pattern. For example, a material having a high refractive index of 1.6 or more as the transparent organic material as the first hard coating layer may be used to reduce index difference with ITO, thereby providing index matching effect.

On the other hand, when the first electrode pattern is formed of an opaque metal, most metals such as aluminum, copper, nickel, chromium, titanium, gold, and silver or the metal alloy may be used as the material. However, it is preferable to form a thin enough (typically less than 3㎛ width) so as not to be visible from the outside, the first electrode pattern is an electrode pattern which is placed on the upper side relative to the display than the second electrode pattern, the width of the The thinner than the second electrode pattern may easily induce a change in capacitance value between the first and second electrode patterns due to the contact of the object approaching the touch panel sensor.

Also, in general, the thickness of the plastic film provided with the electrode pattern is about 100 to 200㎛. This is because the electrode pattern for the electrode pattern is conventionally laid and the electrode pattern is directly formed on the plastic film through a patterning process such as a photolithography process, and the thickness of the plastic film has to be maintained at least 100 μm or more.

However, in the present invention, the first hard coating layer 123 is provided on the first release film 121, the first hard coating layer 123 is transferred onto the upper glass substrate 110, and then the first electrode pattern thereon. Since the thickness of the first hard coating layer 123 is thin, there is no problem in forming the first electrode pattern 140, and in fact, the thickness of the first hard coating layer 123 used in the present invention is 140. It may be provided as an ultra thin film having a thickness of 50 μm or less, and in some cases, 5 μm. Therefore, the thickness of the touch panel sensor can be significantly reduced, which contributes to the improvement of the merchandise of the product by improving the sensitivity.

Hereinafter, a manufacturing process of the above-described first laminated film will be described in detail with reference to FIG. 5.

First, the first laminated film 120 may be provided in a size corresponding to at least one or more upper glass substrates 110, and in this embodiment, the first laminated film 120 of 4 * 4 may be formed at a time. The process is followed and the design can be changed to 5 * 5, 6 * 6, 3 * 4, etc. according to the manufacturer's intention.

Thus, the first laminated film 120 manufactured to a size corresponding to the plurality of upper glass substrates 110 may have a first cut to a size corresponding to one upper glass substrate 110 before being in close contact with the upper glass substrate 110. It may be cut along and used along line 126.

Referring to Figure 5 again in more detail the manufacturing process of the first laminated film 120, first, the first release coating layer 122 may be formed on the first release film 121, the first release The coating layer 122 may be provided in a layer state and may be placed on the first release film 121 as it is, but in this case, since bubbles may enter or be displaced in the mounting process, in this embodiment, the layer state The liquid material for the first release coating layer 122 is dropped on the first release film 121, and the first release film 121 is passed through a roller, rather than directly placed on the first release film 121. It may be spread evenly on the 121, it can be cured to form the first release coating layer 122.

As described above, after the first release coating layer 122 is formed, the first hard coating layer 123 may be formed thereon. This is also preferably formed by a roll coating method using a liquid material, rather than directly put on the layer provided.

In addition, after the first hard coating layer 123 is formed, the window decoration 124 is formed. The window decoration 124 may be provided in a frame shape so as to cover the edge of the upper glass substrate 110 so as to cover the opaque wire and the circuit board electrically connecting the wire and the external device to the edge of the touch panel sensor. have.

As described above, the window decoration 124 may also be formed by dropping a material in a layer state or a liquid, and may be patterned into a frame shape. However, the window decoration 124 may be directly printed in a frame shape by a silkscreen process. It is preferable to do so since the patterning process can be omitted.

In addition, after the window decoration 124 is formed, the liquid material may be dropped to form the first flat adhesive layer 125 and formed by a lamination method.

In the above, the manufacturing process of the 1st laminated | multilayer film corresponding to the several upper glass substrate was demonstrated.

For reference, in the case of a hard coating layer, a liquid curing agent may be applied and cured on a release film, but a PET film or other synthetic resin film having a thickness of about 20 μm may be directly placed on the release film. .

However, in the manufacturing method according to the present invention, since the first laminated film 120 corresponding to the plurality of upper glass substrates 110 is made and cut and used, a natural finishing process is performed in the cutting process.

Accordingly, a component such as a first hard coating layer 123 on the first release film 121, a first flat adhesive layer 125, and the like, which may be formed on the first hard coating layer 123, may be formed without a separate finishing treatment. The time required for finishing can be shortened.

In addition, since the first flat adhesive layer 125, the first hard coating layer 123, and the window decoration 124 are transferred on the upper glass substrate 110 at one time, the process time may be shortened and may occur when stacked one by one. It is possible to minimize the occurrence of defective rate due to the position error. In addition, since the layers of the touch panel sensor are not bonded to each other using an adhesive layer such as a transparent double-sided adhesive such as OCA, defects of the touch panel sensor due to bubble generation do not occur.

Meanwhile, in the present exemplary embodiment, the first flat adhesive layer 125 is formed on the first hard coating layer 123 and the window decoration 124 using a liquid material. However, in some cases, the first flat adhesive layer 125 is formed on the upper glass substrate. It is also possible to provide. In addition, in the present embodiment, the first flat adhesive layer 125 is provided in a two-layer structure including a liquid adhesive layer 127 and an optical adhesive layer 128, and the liquid adhesive layer 127 is a liquid hardener for the first hard coating layer. After coating on 123 and window decoration 124, the liquid curing agent may be provided by curing. In addition, the first laminated film 120 may be in close contact with the upper glass substrate through the optical adhesive layer 128. For reference, the optical adhesive layer 128 may be provided on the liquid adhesive layer 127 as shown in FIG. 3, or may be provided by being seated on the upper glass substrate.

Thus, the first flat adhesive layer may be provided in a multilayer structure, but may also be provided as a single-layer liquid adhesive layer. In some cases, the first flat adhesive layer may include an optical adhesive layer, and adheres to the upper glass substrate through the optical adhesive layer. You can.

The process of integrally stacking the first flat adhesive layer 125, the first hard coating layer 123, and the window decoration 124 on the upper glass substrate 110 using the first laminated film 120 has been described. .

The touch panel sensor according to the present exemplary embodiment may provide a second electrode pattern 150 that detects a position of an object by interacting with the first electrode pattern 140. Hereinafter, a process thereof will be described.

Referring to FIG. 6, the first hard coating layer 123 is transferred to the upper glass substrate 110, and the second release coating layer 132 is formed on the second release film 131 and the second release film 131. ), And a second laminated film 130 including a second hard coat layer 133 formed on the second release coating layer 132, and a first electrode pattern (eg, a second flat adhesive layer 135). The second laminated film 130 may be in close contact with the first hard coating layer 123 on which the 140 is formed.

Then, on the second hard coating layer 133 exposed by removing the second release film 131, as shown in FIG. 7, the second electrode pattern 150 electrically interacting with the first electrode pattern 140. ) Can be formed. Here, when the second release film 131 is removed, the second release coating layer 132 may be attached to the second release film 131 and removed together.

Of course, before the second laminated film 130 is brought into close contact with the second flat adhesive layer 135 formed on the first hard coat layer 123, the first electrode pattern 140 may be electrically connected to the external device. The wire member 142 is preferably formed first, and the second hard coating layer 133 is exposed after the second laminated film 130 is brought into close contact with the second flat adhesive layer 135 to expose the second hard coating layer 133. A second wire member 152 may be formed on the second electrode pattern 150 and the second electrode pattern 150 to electrically connect the external device.

On the other hand, the second laminated film 130 is also provided with a size corresponding to the plurality of (4 * 4) the upper glass substrate 110, like the first laminated film 120 is cut along the second cutting line 136 8, a first wire for electrically connecting the first electrode pattern 140 and the external device provided on the first hard coating layer 123 by forming the incision pattern 134. An end of the member 142 may be exposed.

As described above, after the second hard coating layer 133 is transferred onto the first hard coating layer 123, the second electrode pattern 150 and the second wire member 152 are formed. A touch panel sensor as described above is formed.

Therefore, when the object approaches the surface of the upper glass substrate 110, the change in the capacitance value caused by the interaction between the first and

second electrode patterns

140 and 150 may cause the first and

second wire members

142 and 152 to change. Therefore, it can be transmitted to an external device, wherein the control unit corresponding to the external device can calculate the touch position using the change in the value.

As described above, the touch panel sensor according to the present embodiment sequentially stacks the second electrode pattern 150 on the upper glass substrate 110 to detect the position of the object by interacting with the first electrode pattern 140. Manufacture.

In addition, the touch panel sensor according to another embodiment of the present embodiment shown in FIG. 10 provides a lower transparent film 260 having a second electrode pattern 250 formed under the stack 200 shown in FIG. 4. Then, the laminate 200 and the lower transparent film 260 may be provided by bonding using the optical adhesive layer 270.

In addition, as shown in FIG. 11, a lower glass substrate 360 having a second electrode pattern 350 is formed below the laminate 300 shown in FIG. 4, and the laminate 300 and The lower glass substrate 360 may be bonded using the optical adhesive layer 370 to provide a touch panel sensor.

Meanwhile, the lower glass substrate 360 of FIG. 11 is provided to be thicker than the thickness of the upper glass substrate to prevent electrical signal distortion of the first electrode pattern and the second electrode pattern 350 generated by the electromagnetic wave (EMI) of the display. It can be minimized. For reference, the

laminates

200 and 300 illustrated in FIGS. 10 and 11 are substantially the same as the laminate illustrated in FIG. 4, and a description thereof may be made by referring to the above-described embodiment. .

In particular, the touch panel sensor according to the present invention, even if the thickness of the upper glass substrate, which is made of glass instead of the plastic film, to about 1 mm or less, the thickness of the touch panel sensor does not bend even when the object is thin and the thickness of the object is in contact. The electrical change of the upper electrode pattern can be easily induced.

In addition, the thickness of the lower glass substrate 360 may be about 0.9 to 1.5 mm thicker than that of the plastic film, thereby minimizing electrical signal distortion of the first and second electrode patterns caused by the electromagnetic waves generated from the display. If the lower glass substrate is thinner than 0.9 mm, the gap with the display is reduced. If the lower glass substrate is thicker than 1.5 mm, the overall thickness of the touch panel sensor becomes too thick. The lower glass substrate may also use tempered glass, but it is also possible to use a general glass substrate because it is not directly in contact with the body.

12 is a cross-sectional view of a laminated film for manufacturing a touch panel sensor according to another embodiment of the present invention. Referring to FIG. 12, a release film 421, a release coating layer 422, a window decoration 424, and A laminated film 420 is shown having a flat adhesive layer 425.

The description of the release film 421, the release coating layer 422, and the window decoration 424 of the laminated film 420 may refer to the foregoing embodiment, and in this embodiment, the parts that are different from the previous embodiment are centered. Explain.

As in the present embodiment, the window decoration 424 may be directly formed on the release coating layer 422, and in some cases, an index matching coating layer covering the release coating layer and the window decoration may be further provided.

The laminated film 420 is bonded to the upper glass substrate through the flat adhesive layer 425, and then, when the release film 421 is removed, the flat adhesive layer 425 may be exposed, and the exposed flat adhesive layer 425 may be exposed. An electrode pattern may be provided on the surface.

For reference, before the electrode pattern is formed, the surface of the flat adhesive layer may be preceded by a primer treatment for closely contacting the electrode pattern to the surface.

In addition, in the touch panel sensor illustrated in FIG. 13, a single layer liquid adhesive layer is provided as the first flat adhesive layer 525. The single layer liquid adhesive layer may be cured by interposing or applying a liquid curing agent between the first hard coating layer 523 and the upper glass substrate 510 and exposing the liquid curing agent to ultraviolet rays or heat.

In addition, the first flat adhesive layer may be provided by curing a liquid adhesive layer of a single layer or a plurality of layers. Since the cured liquid adhesive layer has a relatively high hardness compared to a soft optical adhesive layer such as OCA, the contact portion does not deform or break even when the touch panel sensor is electrically connected to the flexible printed circuit board (FPCB). Can be.

The first laminated film 520 may include a first release film 521, a first release coating layer 522, a first hard coating layer 523, in addition to the first flat adhesive layer 525 adhered on the upper glass substrate 510. And window decoration 524.

The first laminated film 520 may be provided in a size corresponding to the plurality of upper glass substrates 510, and as shown in FIG. 14, the first laminated film 520 of 4 * 4 may be formed at a time. Can be. Of course, the design can be changed to 5 * 5, 6 * 6, 3 * 4 and the like.

The first laminated film 520 manufactured to a size corresponding to the plurality of upper glass substrates 510 may be cut and used along the first cutting line 526 before contacting the upper glass substrate 510. It may be cut while bonded on the glass ledger 590 for the upper glass substrate 510.

In addition, after the second electrode film and the second wire member are disposed on the second hard coating layer by using the above-described second laminated film, the glass ledger 590 may be cut to correspond to one upper glass substrate.

In addition, as illustrated in FIG. 15, the first laminated film 520 illustrated in FIG. 14 exposes the first hard coating layer 523 in a state of being bonded to the upper glass substrate 510, and exposes the first hard coating layer 523 on the exposed surface. The first electrode pattern 540 may be formed. In addition, a first wire member 542 connected to the first electrode pattern 540 may be further formed.

As described above, the laminate 500 formed up to the electrode pattern or the wire member is formed by the lower transparent film 560 and the optical adhesive layer 570 on which the second electrode pattern 550 is formed, as shown in FIG. 16. Can be bonded. The lower transparent film may also be manufactured and bonded to a size corresponding to the plurality of upper glass substrates, such as a first laminated film manufactured to a size corresponding to the plurality of upper glass substrates, which may be cut at a time later.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

The touch panel sensor according to the present invention can be widely applied to a display for the purpose of detecting a contact position of an object.

Claims

In the manufacturing method of the touch panel sensor disposed on the display to detect the contact position of the object,

A first release film comprising a first release film, a first release coating layer formed on the first release film, a first hard coating layer formed on the first release coating layer, and a window decoration provided on the first hard coating layer. Providing a laminated film;

Adhering the first laminated film to the upper glass substrate through a first flat adhesive layer;

Removing the first release film to expose the first hard coat layer; And

Providing a first electrode pattern on the first hard coating layer;

The first flat adhesive layer, the first hard coating layer, and the window decoration for planarization are transferred onto the upper glass substrate at a time.
The method of claim 1,

The first laminated film is provided to correspond to at least one or more of the upper glass substrate, and the method of manufacturing a touch panel sensor, characterized in that the cutting is used to correspond to the upper glass substrate before being in close contact with the upper glass substrate.
The method of claim 1,

The first laminated film is provided to correspond to at least one or more of the upper glass substrates, and the first laminated film is in close contact with the glass ledger corresponding to the at least one or more upper glass substrates. Method of manufacturing a touch panel sensor, characterized in that the cutting.
The method of claim 3,

And removing the release film to form the first electrode pattern on the exposed first hard coating layer and to cut the glass ledger.
The method of claim 1,

Providing a second laminated film comprising a second release film, a second release coating layer formed on the second release film, and a second hard coating layer formed on the second release coating layer; And

And adhering the second laminated film to the first hard coating layer having the first electrode pattern formed thereon through a second flat adhesive layer. 2.
The method of claim 5,

And removing a second release film to form a second electrode pattern on the exposed second hard coating layer.
The method of claim 5,

The second hard coating layer and the second release film have a cutting pattern exposing an end portion of a wire member for electrically connecting the first electrode pattern and an external device provided on the first hard coating layer,

The second method of manufacturing a touch panel sensor, characterized in that for removing the second release film after the second laminated film in close contact with the first hard coating layer.
The method of claim 1,

The first flat adhesive layer includes a liquid adhesive layer and an optical adhesive layer,

The liquid adhesive layer is provided by applying a liquid curing agent on the first hard coating layer and the window decoration, and then curing the liquid curing agent,

Method of manufacturing a touch panel sensor, characterized in that the first laminated film in close contact with the upper glass substrate via the optical adhesive layer.
The method of claim 1,

The first flat adhesive layer includes a single layer liquid adhesive layer,

The single-layer liquid adhesive layer is a manufacturing method of the touch panel sensor, characterized in that the liquid curing agent is interposed between the first hard coating layer and the upper glass substrate, and the liquid curing agent is provided to cure.
The method of claim 1,

The first flat adhesive layer includes a first liquid adhesive layer and a second liquid adhesive layer,

The first liquid adhesive layer is provided by applying a first liquid curing agent on the first hard coating layer and the window decoration, and then curing the first liquid curing agent,

The second liquid adhesive layer is provided by interposing a second liquid curing agent, which is the same as or different from the first liquid curing agent, between the first liquid adhesive layer and the upper glass substrate, and curing the second liquid curing agent. Method of manufacturing a touch panel sensor.
The method of claim 1,

The first flat adhesive layer includes an optical adhesive layer,

The method of manufacturing a touch panel sensor, characterized in that the contact with the upper glass substrate via the optical adhesive layer.
The method of claim 1,

And a lower transparent film including a second electrode pattern under the first electrode pattern.
The method of claim 1,

And a lower glass substrate including a second electrode pattern under the upper glass substrate.
The method of claim 1,

And providing an index matching coating layer on the first hard coating layer and providing the first electrode pattern.
The method of claim 1,

The first hard coating layer is a manufacturing method of the touch panel sensor, characterized in that provided to match the refractive index with the first electrode pattern.
In the manufacturing method of the touch panel sensor disposed on the display to detect the contact position of the object,

Providing a laminated film comprising a release film, a release coating layer formed on the release film, and window decoration formed on the release coating layer;

Contacting the laminated film on the upper glass substrate through a flat adhesive layer;

Removing the release film; And

And providing an electrode pattern on the laminated film to which the release film is removed and exposed.

And the window adhesive layer and the window decoration for planarization are transferred onto the upper glass substrate at one time.
The method of claim 16,

The laminated film further includes an index matching coating layer formed on the release coating layer and the window decoration,

Method of manufacturing a touch panel sensor, characterized in that to provide the electrode pattern on the index matching coating layer exposed by removing the release film.
A touch panel sensor manufactured by the method of manufacturing a touch panel sensor of claim 1.