KR101580372B1 - Touch Sensor - Google Patents

Abstract

The touch sensor according to an embodiment of the present invention includes a transparent substrate and an electrode pattern formed on the transparent substrate, and the electrode pattern may be formed by stacking at least two electrode layers. According to the present invention, by forming the electrode pattern with at least two electrode layers, the corrosion resistance and visibility of the electrode pattern can be improved, and the adhesion reliability of the transparent substrate and the electrode pattern can be secured.

Description

A touch sensor

The present invention relates to a touch sensor.

With the development of computers using digital technology, auxiliary devices of computers are being developed together. Personal computers, portable transmission devices, and other personal information processing devices use various input devices such as a keyboard and a mouse And performs text and graphics processing.

However, as the use of computers is gradually increasing due to the rapid progress of the information society, there is a problem that it is difficult to efficiently operate a product by using only a keyboard and a mouse which are currently playing an input device. Therefore, there is an increasing need for a device that is simple and less error-prone, and that allows anyone to easily input information.

In addition, the technology related to the input device is shifting beyond the level that satisfies the general functions, such as high reliability, durability, innovation, design and processing related technology, etc. In order to achieve this purpose, As a possible input device, a touch sensor has been developed.

Such a touch sensor is installed on the display surface of a display such as an electronic notebook, a flat panel display device such as a liquid crystal display device (LCD), a plasma display panel (PDP), and an el (electroluminescence) and a cathode ray tube And is a tool used to allow the user to select desired information while viewing the display.

In addition, the types of touch sensors include Resistive Type, Capacitive Type, Electro-Magnetic Type, SAW (Surface Acoustic Wave Type) and Infrared Type). These various types of touch sensors are employed in electronic products in consideration of problems of signal amplification, difference in resolution, difficulty in design and processing technology, optical characteristics, electrical characteristics, mechanical characteristics, environmental characteristics, input characteristics, durability and economical efficiency Currently, the most widely used methods are resistive touch sensors and capacitive touch sensors.

On the other hand, as for the touch sensor, studies have been actively made to form an electrode pattern using metal as in the patent documents described in the following prior art documents. When the electrode pattern is formed of metal as described above, it has an advantage that the electric conductivity is excellent and the supply and discharge is smooth. However, when the electrode pattern is formed of metal, there is a problem that the electrode pattern can be viewed by the user. Particularly, in the patterning process for forming the electrode pattern, it is difficult to realize a fine pattern due to the difference in etching degree of the lower part of the electrode pattern, a problem of the electrode pattern visibility due to the opacity of the metal electrode used for conductivity, And a reduction in reliability due to corrosion.

JP 2011-175967 A1

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above. According to one embodiment of the present invention, the electrode pattern of the touch sensor is made of at least two laminated structures, In order to further improve the adhesion reliability.

Further, the present invention is intended to solve the problem that the electrode pattern of the exposed portion where the touch sensor is visually recognized by the user is made of a different material so that the electrode pattern is visible by the conductive metal.

In addition, the electrode layer of the multi-layer structure forming the electrode pattern of the touch sensor is formed of the alloy layer, and the proper content ratio of the related material is controlled according to characteristics such as corrosion resistance or visibility, Pattern visibility and corrosion resistance can be solved at the same time.

A touch sensor according to an embodiment of the present invention includes a transparent substrate; And an electrode pattern formed on the transparent substrate, wherein the electrode pattern is formed by stacking at least two electrode layers.

In the touch sensor according to an embodiment of the present invention, the electrode layer may be formed by sequentially laminating a base layer, which is a first electrode layer, and a conductive layer, which is a second electrode layer, from one surface of the transparent substrate.

In the touch sensor according to an embodiment of the present invention, the electrode layer may be formed by laminating a surface layer as a third electrode layer on the second electrode layer.

The touch sensor according to an embodiment of the present invention may further include electrode wirings connected to the electrode patterns for electrical connection of the electrode patterns and having a plurality of corresponding electrode wiring layers corresponding to the respective electrode layers of the electrode patterns .

In the touch sensor according to an embodiment of the present invention, the electrode pattern may be formed in a mesh pattern.

The touch sensor according to an embodiment of the present invention may further include a mesh-type connection pad formed at one end of an electrode wiring for electrical connection of the electrode wiring.

In the touch sensor according to an embodiment of the present invention, the second electrode layer may have a higher conductivity than the first electrode layer.

The touch sensor according to an embodiment of the present invention is characterized in that the first electrode layer has a reflectance lower than that of the second electrode layer.

The first electrode layer may be at least one selected from the group consisting of CuNi, NiCr, Ti, and Mo, or an alloy thereof, according to an embodiment of the present invention.

In the touch sensor according to an embodiment of the present invention, the second electrode layer may be at least one selected from the group consisting of Cu, Al, Ag, or an alloy thereof.

The third electrode layer may be at least one selected from the group consisting of CuNi, NiCr, Ti, and Mo, or an alloy thereof, according to an embodiment of the present invention.

In the touch sensor according to an embodiment of the present invention, the first electrode layer and the third electrode layer may further include at least one selected from the group consisting of manganese (Mn), iron (Fe), and silicon (Si).

The touch sensor according to an embodiment of the present invention may include 0.1 wt% to 3 wt% of manganese (Mn), iron (Fe), or silicon (Si).

In the touch sensor according to an embodiment of the present invention, the first electrode layer may include 10 wt% to 80 wt% of nickel (Ni).

In the touch sensor according to an embodiment of the present invention, the first electrode layer may include 20 wt% to 70 wt% of nickel (Ni).

In the touch sensor according to an embodiment of the present invention, the third electrode layer may include 10 wt% to 80 wt% of nickel (Ni).

In the touch sensor according to an embodiment of the present invention, the third electrode layer may contain 20 wt% to 70 wt% of nickel (Ni).

In the touch sensor according to an embodiment of the present invention, the second electrode layer may be formed of an alloy including copper (Cu) and nickel (Ni).

In the touch sensor according to an embodiment of the present invention, the second electrode layer is an alloy including copper (Cu) and nickel (Ni), and may include 0.1 wt% to 5 wt% of nickel (Ni).

In the touch sensor according to an embodiment of the present invention, the first electrode layer may include chromium (Cr) in an amount of 3 wt% to 50 wt%.

In the touch sensor according to an embodiment of the present invention, the first electrode layer may include chromium (Cr) in an amount of 5 wt% to 70 wt%.

In the touch sensor according to an embodiment of the present invention, the third electrode layer may include chromium (Cr) in an amount of 3 wt% to 50 wt%.

In the touch sensor according to an embodiment of the present invention, the third electrode layer may include chromium (Cr) in an amount of 5 wt% to 70 wt%.

In the touch sensor according to an embodiment of the present invention, the transparent substrate may have a transmittance of 85% or more.

In the touch sensor according to an embodiment of the present invention, the transparent substrate may be formed of a resin layer.

As the touch sensor according to an embodiment of the present invention, the resin layer may be formed of at least one selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone ), Cyclic olefin polymer (COC), TAC (triacetylcellulose) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, polystyrene (PS), biaxially oriented polystyrene biaxially oriented PS (BOPS), or a combination thereof.

In the touch sensor according to an embodiment of the present invention, the transparent substrate may be formed of glass or tempered glass.

In the touch sensor according to an embodiment of the present invention, the thickness of the first electrode layer in the stacking direction may be smaller than the thickness of the second electrode layer.

The thickness d1 of the first electrode layer in the laminating direction, the thickness d2 of the second electrode layer in the laminating direction, and the thickness d3 of the third electrode layer in the laminating direction are d1 < d3 < d2 can be satisfied.

In the touch sensor according to an embodiment of the present invention, the sum of the thickness d1 in the laminating direction of the first electrode layer, the thickness d2 in the laminating direction of the second electrode layer, and the thickness d3 in the laminating direction of the third electrode layer is And may be formed in a range of 0.05 탆 to 2 탆.

In the touch sensor according to an embodiment of the present invention, the thickness of the first electrode layer in the laminating direction may be set to 0.01 mu m to 1.935 mu m.

In the touch sensor according to an embodiment of the present invention, the thickness of the second electrode layer in the stacking direction may be 0.04 mu m to 1.975 mu m.

In the touch sensor according to an embodiment of the present invention, the thickness of the third electrode layer in the stacking direction may be 0.015 m to 1.95 m.

The thickness d1 of the first electrode layer in the stacking direction, the thickness d2 in the stacking direction of the second electrode layer, and the thickness d3 in the stacking direction of the third electrode layer are d2 / the value of (d1 + d2 + d3) x100 may satisfy 2% to 98.75%.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, by forming the electrode pattern with at least two electrode layers, corrosion resistance and visibility characteristics of the electrode pattern can be improved.

Further, the electrode layer of the electrode pattern in contact with the transparent substrate is formed as a thin layer through the multi-layer structure of the electrode pattern of the touch sensor, whereby the adhesive force to the transparent substrate can be further improved.

Further, since the electrode pattern upper electrode layer exposed to the outermost portion recognized by the user is formed of an alloy layer containing nickel (Ni), there is an effect that the visibility of the electrode pattern by the user can be reduced.

Further, in order to improve the corrosion resistance of the electrode pattern of the touch sensor, the exposed electrode layer of the electrode pattern is formed of an alloy containing manganese (Mn), iron (Fe), and silicon (Si) There is an effect that can be made.

Further, by forming the electrode layer of the portion of the touch sensor electrode pattern that is in contact with the transparent substrate with a thin film of an alloy layer containing nickel (Ni), the etching rate during the etching process accompanying the electrode pattern formation can be improved, It is possible to secure the pattern implementation.

Further, the electrode layer in contact with the transparent substrate of the electrode pattern is formed of an alloy layer in the form of a thin film to improve the adhesive force of the electrode pattern, so that the operating performance and the reliability of the driving can be more easily ensured.

1 is a plan view of an electrode pattern according to an embodiment of the present invention;
2 is a cross-sectional view of a touch sensor according to an embodiment of the present invention;
3 is a cross-sectional view of a touch sensor according to an embodiment of the present invention;
4 is a cross-sectional view of a touch sensor according to another embodiment of the present invention;
5 is a sectional view of a touch sensor according to another embodiment of the present invention;
6 to 8 are partial enlarged sectional views of electrode patterns according to an embodiment of an electrode pattern formed of a plurality of electrode layers of the present invention; And
9 is a view showing a structure of an electrode wiring of a touch sensor according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "one side,"" first, "&quot;first,"" second, "and the like are used to distinguish one element from another, no. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of an electrode pattern according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a touch sensor according to an embodiment of the present invention.

A touch sensor according to an embodiment of the present invention includes a transparent substrate 10 and an electrode pattern 20 formed on the transparent substrate 10. The electrode pattern 20 includes at least two electrode layers 20a, May be stacked.

In the touch sensor according to an embodiment of the present invention, the electrode pattern 20 may be formed on one surface and the other surface of the transparent substrate 10, respectively. As shown in FIG. 1, the electrode pattern 20 may be formed in a Bar & Bar type so that the first electrode pattern 21 and the second electrode pattern 22 cross each other. As shown in FIG. 1, the bar-and-bar type can be formed such that the two electrode patterns 20 intersecting with each other are of a rod-like type, and the widths of the respective electrode patterns 20 (meaning width in one direction) are mutually associated. Therefore, the first electrode pattern 21 in the X-axis direction (one direction) and the second electrode pattern 22 in the Y-axis direction (the other direction) intersecting the first electrode pattern extract the touch coordinates in the two- can do.

FIG. 2 illustrates that the electrode pattern 20 is formed on one side of the transparent substrate 10. The first electrode pattern 21 and the second electrode pattern 22 intersecting each other are formed on the transparent substrate 10 Are simultaneously formed on one surface. An insulating pattern (not shown) is formed at a position where the electrode patterns 20 cross each other to form the electrode patterns 20 crossing in two directions on one plane, The electrode pattern 22 can be formed as one layer.

3, a touch sensor according to an embodiment of the present invention includes a first electrode pattern 21 formed directly on a window substrate 10a, a second electrode pattern 21 formed on the first electrode pattern 21, The second electrode pattern 22 can be formed on the resin layer 10b after the thin resin layer 10b is coated. The sensitivity of the touch sensor can be improved by forming the electrode pattern 20 directly on the window substrate 10a and the thickness of the touch sensor can be realized by omitting the structure of the separate transparent substrate 10. [

4, the first electrode pattern 21 in the X-axis direction and the first electrode pattern 21 on the other surface of the transparent substrate 10 are alternately arranged on the surface of the transparent substrate 10, The second electrode pattern 22 in the Y-axis direction can be formed. Although the intersection angle of the first electrode pattern 21 and the second electrode pattern 22 intersecting is shown as being perpendicular to each other, it is not particularly limited to the intersection angle of the first electrode pattern 21 and the second electrode pattern 22. In order to extract coordinates in the two- It would be appropriate to intersect at an appropriate angle so that the Y-axis coordinates can be obtained.

5, a touch sensor according to another embodiment of the present invention includes a first transparent substrate 11 and a second transparent substrate 12, and is formed on a first transparent substrate 11 A second electrode pattern 22 is formed on the second transparent substrate 12 so as to face the first electrode pattern 21 and formed in a direction intersecting the first electrode pattern 21, . The first transparent substrate 11 and the second transparent substrate 12 are bonded to each other by an adhesive layer 40 such as a transparent adhesive, so that a touch sensor can be manufactured. The outermost layer may further include a window substrate 10a as a protective layer for protecting the electrode pattern 20 of the touch sensor. The window substrate 10a may be formed of tempered glass or the like and may be formed by a coating process using a material capable of acting as a protective layer.

The first electrode pattern 21 or the second electrode pattern 22 includes a first electrode layer 20a-1, a second electrode layer 20a-2, and a first electrode layer 20a-1 formed sequentially from one side or the other side of the transparent substrate 10, And a third electrode layer 20a-3. The first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 are formed on both the first electrode pattern 21 and the second electrode pattern 22 It is needless to say that a plurality of electrode layers 20a can be selectively formed on the electrode pattern 20 exposed to the user of the touch sensor among any one of the electrode patterns 20.

In the touch sensor according to another embodiment of the present invention, only the structure of the transparent substrate 10 and the electrode pattern 20 is different from that of the above embodiment. In the electrode pattern 20, the electrode layer 20a is formed in a laminated structure The material and characteristics of the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 used in the same manner will be described later in detail.

In addition, a display unit 50 for displaying an output value input by the user through the touch sensor may be adhered to the other surface of the transparent substrate 10. [ The display unit 50 may include various display devices such as an LCD and an OLED as a video device, and the present invention is not limited to a specific type of device.

The transparent substrate 10 of the touch sensor is not particularly limited as long as the transparent substrate 10 has a transmittance of 85% or more and can output an image of the display unit 50. The transparent substrate 10 may be made of polyethylene terephthalate (PET) (PC), polymethylmethacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone (PES), cyclic olefin polymer (COP), TAC (triacetylcellulose) film, polyvinyl alcohol PVA) film, a polyimide (PI) film, polystyrene (PS), biaxially oriented PS (BOPS containing K resin), glass or tempered glass. Since the electrode pattern 20 may be formed on one side of the transparent substrate 10, a high frequency treatment or primer may be applied to one surface of the transparent substrate 10 in order to improve the adhesive force between the transparent substrate 10 and the electrode pattern 20. a primer treatment may be performed to form a surface treatment layer.

The electrode pattern 20 may be formed on one surface of the transparent substrate 10. As described above, in the touch sensor according to the embodiment of the present invention, the first electrode pattern 21 and the second electrode pattern 22 intersecting on one surface of the transparent substrate 10 may be formed at the same time. Here, the electrode pattern is preferably formed of a mesh pattern formed of metal thin wires. The shape of the mesh pattern includes a polygonal shape such as a square shape, a triangle shape, and a diamond shape, and is not limited to a particular shape. The electrode pattern 20 is made of copper (Cu), aluminum (Al), gold (Au), silver (Ag), titanium (Ti), palladium (Pd), chromium (Cr), nickel A mesh pattern can be formed from at least one selected from the group.

The electrode pattern 20 may be formed by a dry process, a wet process, or a direct patterning process. Here, the dry process includes sputtering, evaporation and the like, and the wet process includes dip coating, spin coating, roll coating, spray coating, etc. And the direct patterning process includes a screen printing method, a gravure printing method, an inkjet printing method, and the like.

Further, a photoresist is coated on the electrode pattern 20 on the substrate by photolithography, and light is irradiated using a mask formed in a desired pattern. At this time, a development process is performed to form a desired pattern such as removing a light-sensitive photosensitive material portion with a developer, or removing a light-unexposed portion with a developer. Then, the photosensitive material is formed into a specific pattern, After removing the remaining portion with an etching solution as a resist and removing the photosensitive material, the electrode pattern 20 having a desired pattern can be manufactured.

In addition, a lift-off method can be used to form the electrode pattern 20 having a fine line width by using various electrode materials.

The lift-off method has a simpler process than the vapor deposition process and the photolithography process, does not require a separate mask, and does not use expensive exposing equipment. A case of using the lift-off method in forming the insulation pattern 30 or the electrode pattern 20 of the touch panel according to an embodiment of the present invention will be briefly described.

First, when a fine pattern is formed using a printing technique or the like, a bank (not shown) as a partition member is formed on the substrate to improve the accuracy of the pattern line width. A bank is formed on the transparent substrate 10 so as to partition a region other than a desired pattern from a predetermined region. Examples of the material of the bank are photo acryl, polyimide, polyvinylalcohol, polyvinyl chloride, polyacryl amide, polyethylene glycol, and the like. The selection of such a material is intended to prevent the material constituting the insulation pattern 30 or the electrode pattern 20 from being dissolved or damaged. Therefore, a material suitable for the material of the electrode pattern 20 may be selected by a person skilled in the art Of course, it can be applied selectively.

Next, a metal material used for the electrode pattern 20 is coated on the substrate on which the bank is formed. Various methods such as screen printing, offset printing, and spin coating can be selectively applied.

Finally, the electrode pattern 20 can be formed through a lift-off step. In this step, a desired electrode pattern 20 can be formed by performing a lift-off process on the bank portion where the electrode pattern 20 is formed. Here, as an example of the lift-off method, a step of removing a bank using a solution for dissolving a substance constituting the bank, and the electrode pattern 20 formed on the upper part of the bank at this step can also be removed together. Therefore, only the electrode pattern 20 that does not include the bank remains, and the desired electrode pattern 20 can be obtained.

This mesh pattern has a problem that the electrode pattern 20 of the touch sensor is easily recognized by the user as the electrode pattern 20 is formed using the opaque metal thin wire. Therefore, it is necessary that the electrode pattern 20 including the mesh pattern is realized as a fine pattern and the visibility of the electrode pattern 20 is reduced. Further, by forming the electrode pattern 20 using metallic fine wires, a potential difference or a durability that can easily be corroded due to being connected to the electrode wiring connecting the positive and negative electrodes may occur.

Therefore, in the present invention, a plurality of electrode layers 20a for more effectively combining the materials of the electrode patterns 20 are formed, and alloying metals of different materials for preventing corrosion of the electrode patterns 20, A touch sensor capable of ensuring the conductivity of the pattern (20) as well as improving the environmental resistance and visibility characteristics of the electrode pattern (20).

The electrode pattern 20 of the present invention may form at least two electrode layers 20a in the stacking direction on the transparent substrate 10 in order to improve the environmental resistance and visibility as described above.

6 to 8, the electrode pattern 20 sequentially forms the base layer 20a-1, the conductive layer 20a-2, and the surface layer 20a-3 from one side of the transparent substrate 10, 2 or the surface layer 20a-3 is formed (see Figs. 7 and 8), or the base layer 20a-1 and the conductive layer 20a-2 or the conductive layer 20a- The number of layers stacked is not particularly limited and may include those skilled in the art to improve the same or corresponding related effects. For convenience of explanation, the base layer is defined as the first electrode layer 20a-1, the conductive layer is defined as the second electrode layer 20a-2, and the surface layer is defined as the third electrode layer 20a-3. Further, such names and functions do not limit the scope of rights of each constitution.

The first electrode layer 20a-1 which is in contact with one surface of the transparent substrate 10 ensures the adhesion with the transparent substrate 10 and the etching rate in the etching process which can be accompanied for forming the electrode pattern 20 the etching rate can be improved and the implementation of the fine electrode pattern 20 can be further facilitated. It is preferable that the third electrode layer 20a-3 is made of a corrosion-resistant material for preventing electrical reliability degradation due to corrosion of the electrode pattern 20, or formed of a material for improving visual characteristics by the user at the outermost periphery Do.

Serial Number
Electrode material The substrate layer
(First electrode layer) Composition (wt%) Conductive layer
(Second electrode layer) Composition (wt%) Surface layer
(Third electrode layer) Composition (wt%) Example 1 CuNi Ni (10 to 90)
Ni (20 to 70) Cu 98-100 CuNi Ni (10 to 90)
Ni (20 to 70) Example 2 NiCr Cr (5 to 70)
Cr (3 to 50) Cu 98-100 NiCr Cr (5 to 70)
Cr (3 to 50) Example 3 Ti Cu 98-100 Ti Example 4 Mo Cu 98-100 Mo Example 5 CuNi Ni (10 to 90)
Ni (20 to 70) Al 98-100 CuNi Ni (10 to 90)
Ni (20 to 70) Example 6 NiCr Cr (5 to 70)
Cr (3 to 50) Al 98-100 NiCr Cr (5 to 70)
Cr (3 to 50) Example 7 Ti Al 98-100 Ti Example 8 Mo Al 98-100 Mo Example 9 CuNi Ni (10 to 90)
Ni (20 to 70) Ag 80 ~ 97 CuNi Ni (10 to 90)
Ni (20 to 70) Example 10 NiCr Cr (5 to 70)
Cr (3 to 50) Ag 80 ~ 97 NiCr Cr (5 to 70)
Cr (3 to 50) Example 11 Ti Ag 80 ~ 97 Ti Example 12 Mo Ag 80 ~ 97 Mo

The first electrode layer 20a-1 and the second electrode layer 20a-2 or the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3, Can be appropriately combined and applied to each of Embodiments 1 to 12 as shown in Table 1 shown above.

Each of the electrode layers of the present invention is basically composed of an alloy including copper and nickel, an alloy including nickel and chromium, and an alloy including titanium or molybdenum as the first electrode layer 20a-1 as a base layer The second electrode layer 20a-2 may be made of copper, aluminum or silver, and the third electrode layer 20a-3 may be made of an alloy including copper and nickel, an alloy including nickel and chromium, titanium or molybdenum Can be selected and applied. The materials of the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 are independent of each other, and the first electrode layer 20a-1, The second electrode layer 20a-2, and the third electrode layer 20a-3 may be selectively formed and the electrode layers may be formed in a combination of two or three layers. The present invention is not limited to the combination of the first electrode layer 20a-1, the second electrode layer 20a-2 and the third electrode layer 20a-3.

Specifically, the first electrode layer 20a-1 and the third electrode layer 20a-3 may be formed of an alloy of copper and nickel. Nickel may be included to alleviate the visible characteristics of copper that are generated as a result of using an electrically conductive copper electrode pattern (20). In the case of performing blackening treatment or the like for reducing the visibility characteristic of the electrode pattern 20 formed of copper, the thickness of the electrode pattern 20 is set so as to satisfy the minimum area of the upper surface of the electrode pattern 20 to be blackened There was a limit to be maintained at a certain thickness or more. However, by laminating the third electrode layer 20a-3 on the exposed portion of the electrode pattern 20 with an alloy containing nickel, the visibility characteristic of the electrode pattern 20 can be reduced without being limited by the thickness of the electrode pattern 20 It is. The nickel content of the first electrode layer 20a-1 and the third electrode layer 20a-3 may be 10wt% to 90wt%, more preferably 20wt% to 70wt%.

In addition, the first electrode layer 20a-1 and the third electrode layer 20a-3 may be formed of an alloy including nickel and chromium. In this case, chromium may be contained in an amount of 5 wt% to 70 wt%, more preferably 3 wt% to 50 wt%.

In addition, the first electrode layer 20a-1 and the third electrode layer 20a-3 may be formed of an alloy including titanium or molybdenum.

Further, the third electrode layer 20a-3 may further include manganese, iron or silicon for improving the corrosion resistance of the electrode pattern 20. It is appropriate to include manganese, iron or silicon in a minimum range, and it is appropriate to include 0.1 wt% to 1 wt%.

The second electrode layer 20a-2 may be formed of copper, aluminum, or a combination thereof. It is appropriate that the second electrode layer 20a-2 is selected and applied in consideration of electrical conductivity. In addition, it is preferable that copper or aluminum is formed to be 98wt% to 100wt% in consideration of electric conductivity, and it is appropriate to form it to include 80wt% to 97wt% in case of silver.

The second electrode layer 20a-2 may be formed of an alloy of copper and nickel. However, considering the electrical conductivity, it is more preferable that the alloy is alloyed so as to contain 0.1 wt% to 5 wt% of nickel. The second electrode layer 20a-2 is not particularly limited as long as it is a conductive metal. The adhesive strength between the electrode layers 20a for combination with the first electrode layer 20a-1 and the third electrode layer 20a-3, And chemical characteristics due to contact between the electrode layers 20a.

Next, although the electrode pattern 20 may be formed of three layers of the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 described above, The electrode layer 20a of the first electrode layer 20a-1 and the second electrode layer 20a-2 or the second electrode layer 20a-2 and the third electrode layer 20a-3 Of course. In the laminated structure of the electrode layer 20a of the electrode pattern 20, the first electrode layer 20a-1 on the contact surface between the transparent substrate 10 and the electrode pattern 20 and the third electrode layer 20b- Is not necessarily limited to the two or three electrode layers 20a as long as it satisfies the material properties by the corrosion resistance and the visibility characteristics of the electrode layer 20a-3. However, in view of the trend of thinning of the touch sensor, it is desirable to select the lamination structure and the number considering the thickness of the electrode pattern 20 appropriately.

Next, with reference to FIG. 6, the thicknesses of the first electrode layer, the second electrode layer 20a-2, and the third electrode layer 20a-3 forming the electrode pattern of the touch sensor in the stacking direction will be described.

The first electrode layer 20a-1 may be formed on the contact surface between the transparent substrate 10 and the electrode pattern 20 and may be formed as a thin film layer to further improve the contact force between the transparent substrate 10 and the electrode pattern 20 . On the other hand, the third electrode layer 20a-3 is formed for reducing corrosion resistance and visibility of the electrode pattern 20, and it is appropriate that the thickness of the first electrode layer 20a-1 is made thicker in the stacking direction.

Specifically, when the first electrode layer 20a-1 is formed to include the first electrode layer 20a-1 and the second electrode layer 20a-2 sequentially stacked from one surface of the transparent substrate 10, the first electrode layer 20a- (20a-2) in the stacking direction. Through the difference in the relative thickness, the substrate layer can improve adhesion of the electrode pattern to the transparent substrate through the first electrode layer 20a-1, thereby improving the reliability of the electrode pattern.

In the case where the third electrode layer 20a-3 is further formed on the second electrode layer 20a-2, the thickness of the third electrode layer 20a-3 in the stacking direction is larger than the thickness of the second electrode layer 20a-2 in the stacking direction The thickness of the third electrode layer 20a-3 in the stacking direction may be formed to be thinner than the thickness of the first electrode layer 20a-1 in the stacking direction.

More specifically, the minimum thickness of the first electrode layer 20a-1 for maintaining the adhesion of the second electrode layer 20a-2 to the substrate layer on the transparent substrate is 0.01 m, the second electrode layer 20a- The minimum thickness for maintaining the electrical reliability of the electrode pattern to the layer is 0.04 mu m and the minimum thickness for maintaining the visibility of the electrode pattern and corrosion prevention etc. of the third electrode layer 20a-3 is 0.015 mu m, respectively have.

Therefore, the sum of the thicknesses of the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 may be 0.05 占 퐉 to 2 占 퐉.

In the above relationship, the first electrode layer 20a-1 is formed to have a thickness of 0.01 m to 1.945 m, so that the reliability of adhesion of the conductive layer as the second electrode layer 20a-2 on the transparent substrate can be ensured . In the case where the first electrode layer 20a-1 is formed below the minimum range of the first electrode layer 20a-1, the adhesive force is lost and the conductive layer can not secure the adhesion reliability of the second electrode layer 20a-2, If the thickness of the first electrode layer 20a-1 is more than 1.935 占 퐉, the adhesion of the electrode layer 20a-2 to the second electrode layer 20a-2, which is the conductive layer, Function can not be performed.

The second electrode layer 20a-2 is formed to have a thickness of 0.04 mu m to 1.975 mu m. As a conductive layer, electrical reliability and operating performance of the electrode pattern of the touch sensor can be secured. When the thickness of the second electrode layer 20a-2 is less than 0.04 mu m, the electrical reliability can not be secured as the conductive layer. When the thickness is more than 1.975 mu m, the first electrode layer 20a-1 It is impossible to secure the adhesion force by the adhesive.

The third electrode layer 20a-3 is formed to have a thickness of 0.015 mu m to 1.95 mu m to reduce the visibility of the electrode pattern to the surface layer and to prevent corrosion of the electrode pattern exposed to the outside. When the thickness of the third electrode layer 20a-3 is less than 0.015 탆, it is impossible to effectively reduce the visibility of the second electrode layer 20a-2, which is the conductive layer, as the surface layer. Not only hindering the thinning of the pattern but also causing a problem that the electrical reliability of the entire electrode pattern can be impaired due to the excessive thickness of the surface layer.

Therefore, the thickness of the first electrode layer 20a-1 and the second electrode layer 20a-2 or the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 It is possible to reduce the visibility due to the use of the opaque electrode pattern and to prevent the corrosion of the exposed electrode pattern at the same time as well as the operational reliability of the touch sensor by designing the respective thicknesses as described above within such a range There is an advantage to be able to do.

The thicknesses d1 and d2 of the first electrode layer 20a-1 and the thickness d1 of the third electrode layer 20a-3 formed in the stacking direction of the third electrode layer 20a-3, and the thickness d3 of the third electrode layer 20a-3 may be formed to be thinner than the thickness d2 of the second electrode layer 20a-2.

Here, the characteristics and materials of the first electrode layer 20a-1, the second electrode layer 20a-2, and the third electrode layer 20a-3 are the same as those of the three electrode layers 20a described above, .

9 is a view showing an embodiment of electrode wiring of a touch sensor according to an embodiment of the present invention.

9, the electrode wiring 30 of the touch sensor according to an embodiment of the present invention is connected to the electrode pattern 20 for electrical connection of the electrode pattern 20, And a plurality of electrode wiring layers 30a corresponding to the electrode layers 20a. That is, the electrode wiring layer 30a of the same material as that of the electrode layer 20a of the electrode pattern 20 can be formed in the same manner as the manufacturing process of the electrode pattern 20 in the manufacturing process of the touch sensor. However, since the manufacturing method and material of the electrode wiring layer 30a are not particularly limited, a plurality of electrode wiring layers 30a for corrosion and environmental resistance of the electrode wiring 30 itself can be laminated and formed separately to be.

9, the electrode wiring 30 is formed by laminating a first electrode wiring layer 30a-1, a second electrode wiring layer 30a-2, and a third electrode wiring layer 30a-3 And may be formed to correspond to the electrode layer 20a of the touch sensor described above. Therefore, it is apparent that the electrode wiring layer 30a may have a laminate structure of two or more layers.

A connection pad 30b for electrical connection with a flexible printed circuit board (not shown) may be formed at one end of the electrode wiring 30 in the form of a mesh. In this case, it is needless to say that the connection pad 30b can be laminated and manufactured in the same manner as the electrode wiring layer 30a of the electrode wiring 30 described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be apparent that modifications and improvements can be made by those skilled in the art.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: transparent substrate 10a: window substrate
10b: resin layer 11: first transparent substrate
12: second transparent substrate 20: electrode pattern
20a: electrode layer 20a-1: first electrode layer
20a-2: Second electrode layer 20a-3: Third electrode layer
21: first electrode pattern 22: second electrode pattern
30: electrode wiring 30a: electrode wiring layer
30a-1: First wiring layer 30a-2: Second wiring layer
30a-3: third wiring layer 30b: connection pad
40: adhesive layer 50: display part
I: Insulation pattern

Claims (34)

A transparent substrate; And
And an electrode pattern formed on the transparent substrate,
Wherein the electrode pattern is formed by stacking at least two electrode layers,
Wherein the electrode layer is formed by sequentially laminating a base layer as a first electrode layer, a conductive layer as a second electrode layer, and a surface layer as a third electrode layer from one surface of the transparent substrate,
The thickness d1 in the stacking direction of the first electrode layer, the thickness d2 in the stacking direction of the second electrode layer, and the thickness d3 in the stacking direction of the third electrode layer are
d1 < d3 < d2,
Wherein the second electrode layer has higher conductivity than the first electrode layer and the third electrode layer.
delete delete The method according to claim 1,
And an electrode wiring connected to the electrode pattern for electrical connection of the electrode pattern,
The electrode wiring
A first electrode wiring layer corresponding to the first electrode layer;
A second electrode wiring layer corresponding to the second electrode layer; And
And a third electrode wiring layer corresponding to the third electrode layer. The method according to claim 1,
Wherein the electrode pattern is formed in a mesh pattern. The method of claim 4,
And a mesh type connection pad formed at one end of the electrode wiring for electrical connection of the electrode wiring, delete The method according to claim 1,
Wherein the first electrode layer has a reflectivity lower than that of the second electrode layer. The method according to claim 1,
Wherein the first electrode layer is at least one selected from the group consisting of CuNi, NiCr, Ti, and Mo, or an alloy thereof,
Wherein the second electrode layer is at least one selected from the group consisting of Cu, Al and Ag or an alloy thereof,
Wherein the third electrode layer is at least one selected from the group consisting of CuNi, NiCr, Ti, and Mo, or an alloy thereof.
delete delete The method according to claim 1,
Wherein the first electrode layer and the third electrode layer further include at least one selected from the group consisting of manganese (Mn), iron (Fe), and silicon (Si). The method of claim 12,
Wherein the manganese (Mn), iron (Fe), or silicon (Si) is contained in an amount of 0.1 wt% to 3 wt%. The method according to claim 1,
Wherein the first electrode layer includes nickel (Ni) in an amount of 10 wt% to 80 wt%. The method according to claim 1,
Wherein the first electrode layer includes 20 wt% to 70 wt% of nickel (Ni). The method according to claim 1,
Wherein the third electrode layer includes nickel (Ni) in an amount of 10 wt% to 80 wt%. The method according to claim 1,
And the third electrode layer includes 20 wt% to 70 wt% of nickel (Ni). The method according to claim 1,
Wherein the second electrode layer is formed of an alloy including copper (Cu) and nickel (Ni). 19. The method of claim 18,
Wherein the second electrode layer is an alloy including copper (Cu) and nickel (Ni), and the nickel (Ni) content is 0.1 wt% to 5 wt%. The method according to claim 1,
Wherein the first electrode layer includes chromium (Cr) in an amount of 3 wt% to 50 wt%. The method according to claim 1,
Wherein the first electrode layer includes chromium (Cr) in an amount of 5 wt% to 70 wt%. The method according to claim 1,
And the third electrode layer includes chromium (Cr) in an amount of 3 wt% to 50 wt%. The method according to claim 1,
And the third electrode layer includes chromium (Cr) in an amount of 5 wt% to 70 wt%. The method according to claim 1,
Wherein the transparent substrate has a transmittance of 85% or more. The method according to claim 1,
Wherein the transparent substrate is formed of a resin layer. 26. The method of claim 25,
The resin layer may be formed of at least one selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone (PES), cyclic olefin polymer (COP) Formed by a triacetylcellulose film, a polyvinyl alcohol (PVA) film, a polyimide (PI) film, polystyrene (PS), biaxially oriented PS (BO resin containing K resin) Touch sensor. The method according to claim 1,
Wherein the transparent substrate is formed of glass or tempered glass. The method according to claim 1,
The thickness of the first electrode layer in the stacking direction is 0.01um or more,
The thickness of the second electrode layer in the stacking direction is 0.04um or more,
Wherein the thickness of the third electrode layer in the stacking direction is 0.015um or more.
delete The method according to claim 1,
Wherein the sum of the thickness d1 in the stacking direction of the first electrode layer, the thickness d2 in the stacking direction of the second electrode layer, and the thickness d3 in the stacking direction of the third electrode layer is 0.05 m to 2 m. The method according to claim 1,
Wherein the thickness of the first electrode layer in the stacking direction is set to 0.01 to 1.935 mu m. The method according to claim 1,
And the thickness of the second electrode layer in the stacking direction is 0.04 m to 1.975 m. The method according to claim 1,
Wherein the thickness of the third electrode layer in the stacking direction is 0.015 m to 1.95 m. The method according to claim 1,
The thickness d1 in the stacking direction of the first electrode layer, the thickness d2 in the stacking direction of the second electrode layer, and the thickness d3 in the stacking direction of the third electrode layer are
and a value of d2 / (d1 + d2 + d3) x100 satisfies 2% to 98.75%.

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