WO2020141876A2

WO2020141876A2 - Touch sensor and image display device including same

Info

Publication number: WO2020141876A2
Application number: PCT/KR2020/000011
Authority: WO
Inventors: 박용수; 유성우; 이재현; 김건; 윤주인
Original assignee: 동우화인켐 주식회사
Priority date: 2019-01-02
Filing date: 2020-01-02
Publication date: 2020-07-09
Also published as: WO2020141876A3

Abstract

A touch sensor according to embodiments of the present invention comprises a base layer, a first electrode layer disposed on the base layer, and a second electrode layer disposed on the first electrode layer. The first electrode layer comprises a plurality of first sensing electrode rows which extend along a first direction parallel to the upper surface of the base layer, and first traces branching off from the first sensing electrode rows, respectivley, and alternately distributed and arranged on both sides of the base layer. The second electrode layer comprises a plurality of second sensing electrode columns parallel to the upper surface of the base layer and extending along a second direction intersecting the first direction, and second traces branching off from the second sensing electrode columns.

Description

Touch sensor and image display device including same

The present invention relates to a touch sensor and an image display device including the same. More specifically, it relates to a touch sensor including a sensing electrode and a trace, and an image display device including the same.

With the recent development of information technology, the demand for the display field has been presented in various forms. For example, various flat panel display devices having characteristics such as thinning, lightening, and low power consumption, for example, a liquid crystal display device, a plasma display panel device, Electroluminescent display devices, organic light-emitting diode display devices, and the like have been studied.

On the other hand, an input device, a touch panel or a touch sensor, which is attached to the display device and allows a user to input a command by selecting an instruction displayed on the screen as a human hand or an object, is combined with a display device to display images Electronic devices with information input functions are being developed. For example, as in Korean Patent Publication No. 2014-0092366, a touch screen panel in which a touch sensor is combined with various image display devices has been developed.

In addition, as the resolution of the display device is improved to a level of QHD (Quad High Definition), UHD (Ultra High Definition), etc., the resolution of the touch sensor also needs to be increased. Further, as various sensing functions such as fingerprint sensing are expanded and applied to recent display devices, fine-pitch sensing electrodes and traces capable of implementing fingerprint sensing may be included in the touch sensor with higher integration.

However, for example, as the density of traces increases, the margin between adjacent traces decreases and signal interference may occur. In addition, when mechanical stress, such as a bending operation, is applied, traces are easily damaged and a sensing failure may occur.

Accordingly, it is necessary to develop a touch sensor capable of realizing high-resolution sensing functions while maintaining mechanical and electrical reliability.

One object of the present invention is to provide a touch sensor having improved mechanical, electrical, and operational reliability.

One object of the present invention is to provide a window stack having improved mechanical, electrical, and operational reliability.

One object of the present invention is to provide a display device including a touch sensor having improved mechanical, electrical, and operational reliability.

1. base layer; A first electrode layer disposed on the base layer; And a second electrode layer disposed on a different layer from the first electrode layer on the base layer.

The first electrode layer may include a plurality of first sensing electrode rows extending in a first direction parallel to an upper surface of the base layer; And first traces branched from each of the first sensing electrode rows and alternately distributed on both sides of the base layer,

The second electrode layer is a plurality of second sensing electrode columns extending in a second direction parallel to the upper surface of the base layer and crossing the first direction; And second traces branching from the second sensing electrode rows.

2. In the above 1, wherein the first traces are alternately connected to one end and the other ends of each of the first sensing electrode rows, a touch sensor.

3. In the above 2, the width of the first trace satisfies Expression 1 below, a touch sensor:

[Equation 1]

0.1P ≤ W1 <2P

(In equation 1, W1 represents the width of the first trace, P is the pitch of the first sensing electrode rows).

4. In the above 1, further comprising an intermediate trace electrically connected to each of the first trace, the touch sensor.

5. In the above 4, wherein the intermediate trace comprises a first portion connected to the first trace and extending from the first portion and a second portion bent from the first portion and extending in the second direction, Touch sensor.

6. The touch sensor according to 5 above, wherein the width of the first portion of the intermediate trace is greater than the width of the second portion.

7. In the above 6, the width of the first portion of the intermediate trace satisfies the following equation 1, a touch sensor:

[Equation 1]

0.1P ≤ W1 <2P

(In equation 1, W1 represents the width of the first portion of the mediation trace, P is the pitch of the first sensing electrode rows).

8. The touch sensor according to the above 4, further comprising an insulating layer formed on the base layer and formed between the first electrode layer and the second electrode layer.

9. The touch sensor according to the above 8, wherein the intermediate traces are disposed on the same layer as the second electrode layer.

10. The touch sensor according to 9 above, further comprising a contact penetrating the insulating layer and connecting the intermediate trace and the first trace.

11. The touch sensor according to 9 above, wherein the intermediate traces and the distal ends of the second traces are gathered together on one end of the insulating layer.

12. The touch sensor according to 11 above, further comprising a capping layer formed on distal ends of the intermediate traces and the second traces.

13. The touch sensor according to the above 12, wherein the capping layer comprises a transparent conductive oxide.

14. In the above 1, the first sensing electrode row includes a plurality of first sensing unit electrodes connected to each other along the first direction,

The second sensing electrode column includes a plurality of second sensing unit electrodes connected to each other along the second direction.

15. The touch sensor according to 14 above, wherein the sheet resistance of each of the first sensing unit electrode and the second sensing unit electrode is 0.05 to 10 Ω/□.

16. In the above 14, the width of each of the first sensing unit electrode and the second sensing unit electrode is less than 100㎛, the first sensing unit electrode and the second sensing unit electrode is a fingerprint sensing electrode Provided, touch sensor.

17. In the above 1, the first sensing electrode row extends along the first direction and includes a plurality of first sub-electrode lines connected in parallel to each other,

The second sensing electrode row extends along the second direction and includes a plurality of second sub-electrode lines connected in parallel with each other.

18. In the above 17, the first sub-electrode lines are connected to each other to define the first sensing electrode row, and the second sub-electrode lines are connected to each other to merge portions defining the second sensing electrode column. Including,

The first traces and the second traces extend from each of the merging portions, a touch sensor.

19. window substrate; And a touch sensor according to the above-described embodiments.

20. Display panel; And a touch sensor stacked on the display panel and according to the above-described embodiments.

According to embodiments of the present invention, it is possible to increase the spacing or pitch between neighboring traces by alternately distributing traces diverging from the sensing electrodes in the peripheral regions of both sides of the touch sensor. Therefore, it is possible to implement a high-resolution, high-reliability touch sensor by securing a predetermined pitch while increasing the number or density of traces.

According to exemplary embodiments, the sensing electrode and the traces may be formed in a two-layer structure, and the lower traces may be aggregated at the same level as the upper traces through a contact. Therefore, while realizing a fine pitch high-resolution sensing structure, it is possible to easily perform electrical connection through, for example, a flexible printed circuit board.

According to exemplary embodiments, the touch sensor may be used as a high-resolution sensing structure such as a fingerprint sensor.

1 is a schematic plan view showing a touch sensor according to example embodiments.

2 and 3 are schematic cross-sectional views illustrating a touch sensor according to example embodiments.

4 is a partially enlarged plan view illustrating a touch sensor in accordance with some example embodiments.

Fig. 5 is a partially enlarged plan view showing a touch sensor according to some example embodiments.

6 is a schematic cross-sectional view illustrating a window stack and an image display device according to example embodiments.

Embodiments of the present invention includes a plurality of sensing electrodes and traces, and provides a touch sensor capable of realizing high-resolution and high-reliability sensing through the arrangement of the sensing electrodes and traces. In addition, an image display device including the touch sensor is provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following drawings attached to this specification are intended to illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the contents of the present invention, the present invention is described in such drawings It should not be interpreted as being limited to the matter.

In the following drawings, for example, two directions parallel to and intersecting with the top surface of the base layer 100 are defined as the first direction and the second direction. The first direction and the second direction may intersect perpendicularly to each other. For example, the first direction may correspond to the width direction or the X direction, and the second direction may correspond to the length direction or the Y direction.

The term "touch sensor" used in the present application is used to mean a sensor that generates a signal by recognizing a fingerprint shape of a finger and a sensor that inputs a command or generates a signal according to the touch of a user's finger or a tool. .

1 is a schematic plan view showing a touch sensor according to example embodiments. 2 and 3 are schematic cross-sectional views illustrating a touch sensor according to example embodiments.

Specifically, FIG. 2 is a cross-sectional view cut along the I-I' line of FIG. 1 in the thickness direction of the touch sensor. 3 is a cross-sectional view taken along the line II-II' of FIG. 1 in the thickness direction of the touch sensor. For convenience of description, the illustration of the insulating layer is omitted in FIG. 1.

1 to 3, the touch sensor may include a base layer 100 and

electrode layers

110 and 140 arranged on the base layer 100.

The base layer 100 is used in a sense to encompass an object on which a film type substrate, an interlayer insulating layer, or an

electrode layer

110 or 140 is formed as a support layer for forming the electrode layers 110 or 140. In some embodiments, the base layer 100 may refer to a display panel on which the electrode layers 110 and 140 are directly formed.

For example, the base layer 100 may be a substrate or film material commonly used in touch sensors without particular limitation, and may include, for example, a polymer and/or inorganic insulating material having flexible properties. . Non-limiting examples of the polymer, cyclic olefin polymer (COP), polyethylene terephthalate (PET), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS) ), polyallylate, polyimide (PI), cellulose acetate propionate (CAP), polyethersulfone (PES), cellulose triacetate (TAC), polycarbonate (PC), cyclic olefin copolymer (COC) ), polymethyl methacrylate (PMMA), and the like. Examples of the inorganic insulating material include silicon oxide, silicon nitride, silicon oxynitride, and metal oxide.

The electrode layers 110 and 140 may include a first electrode layer 110 and a second electrode layer 140. The first electrode layer 110 and the second electrode layer 140 may be disposed at different levels or different layers. According to example embodiments, the second electrode layer 140 may be disposed on the upper layer of the first electrode layer 110.

In example embodiments, as illustrated in FIGS. 2 and 3, the first electrode layer 110 may be formed on the top surface of the base layer 100. The insulating layer 120 may be formed on the base layer 100 to cover the first electrode layer 110. The second electrode layer 140 may be formed on the insulating layer 120.

The insulating layer 120 may include an inorganic insulating material such as silicon oxide and silicon nitride, or an organic insulating material such as acrylic resin or siloxane resin. For example, the insulating layer 120 may be formed through a coating process such as spin coating, slit coating, inkjet printing, offset printing, or a printing process. The insulating layer 120 may be formed through a deposition process such as a chemical vapor deposition (CVD) process or a physical vapor deposition (PVD) process.

The first electrode layer 110 and the second electrode layer 140 are silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), Tungsten (W), Niobium (Nb), Tantalum (Ta), Vanadium (V), Iron (Fe), Manganese (Mn), Cobalt (Co), Nickel (Ni), Zinc (Zn), Tin (Sn) or alloys thereof (eg, silver-palladium-copper (APC)). These may be used alone or in combination of two or more.

The first electrode layer 110 and the second electrode layer 140 are indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), etc. It may contain a transparent conductive oxide.

The first electrode layer 110 and the second electrode layer 140 may include a stacked structure of transparent conductive oxide and metal. For example, the first electrode layer 110 and the second electrode layer 140 may have a three-layer structure of a transparent conductive oxide layer-metal layer-transparent conductive oxide layer. In this case, while the flexible characteristics are improved by the metal layer, the signal transmission speed may be improved by lowering the resistance, and the corrosion resistance and transparency may be improved by the transparent conductive oxide layer.

The first electrode layer 110 and the second electrode layer 140 may be formed by depositing the above-described conductive material through a PVD process, such as a sputtering process, and then patterning it through a wet or dry etching process. have.

The first electrode layer 110 may include first sensing unit electrodes 112 and a first connection unit 115. For example, the first sensing unit electrodes 112 are connected to each other by the first connection units 115 and may be arranged along the first direction. Accordingly, a first sensing electrode row extending in the first direction may be defined. Also, a plurality of the first sensing electrode rows may be arranged in a second direction.

According to exemplary embodiments, the first connection unit 115 and the first sensing electrode unit electrodes 112 may be integrally connected to each other and provided as a substantially single member.

The first electrode layer 110 may further include a first trace 117. The first trace 117 may branch from the end of each row of the first sensing electrode in the first direction.

According to example embodiments, the first trace 117 may be alternately distributed and disposed on both sides of the touch sensor or the base layer 100 (eg, both sides in the first direction).

As shown in FIG. 1, the first trace 117 may alternately branch from one end and the other end of the first sensing electrode row along the second direction.

2 and 3, the insulating layer 120 may cover the first electrode layer 110 on the base layer 100. A contact hole exposing the first trace 117 at least partially is formed in the insulating layer 120, and a contact 125 may be formed in the contact hole.

The intermediate trace 130 may be disposed on the insulating layer 120. According to example embodiments, the intermediate trace 130 may be electrically connected to the first trace 117 through the contact 125.

The intermediate trace 130 may be arranged to substantially correspond to the first trace 117. According to exemplary embodiments, a plurality of intermediary traces 130 are disposed along the second direction, and may be alternately arranged on both sides of the touch sensor in the first direction.

As described above, as the first traces 117 are alternately distributed on both sides of the touch sensor, an interval or pitch between adjacent first traces 117 may be increased. Accordingly, the electrical connection margin or the alignment margin can be increased while maintaining the number or density of the first traces 117.

In the case of a high-resolution touch sensor such as a fingerprint sensor, the pitch between neighboring first traces 117 may be reduced. Accordingly, adjacent first traces 117 may be exposed together due to an etch resolution limit of an insulating layer when forming the contact hole, for example, to connect the intermediate trace 130. In this case, when the contact 125 is formed in the contact hole, a short circuit of adjacent first traces 117 may be caused.

However, according to the exemplary embodiments described above, the first traces 117 may be alternately distributed on both sides of the touch sensor to increase the pitch. Accordingly, an alignment margin for forming the contact 125 is additionally secured, so that high reliability, high resolution sensing sensitivity, and signal transmission can be implemented.

For example, in the flexible display device, when the touch sensor is folded along the virtual folding line 10 shown in FIG. 1, sensing or signal transmission failure may be caused by disconnection or cracking of the electrode layer. However, according to exemplary embodiments, as the first traces 117 are alternately distributed on both sides, the probability that a sensing function failure may occur as a whole of the first electrode layer 110 may be reduced, and the sensing function is maintained. Can increase the area.

The second electrode layer 140 may include second sensing unit electrodes 142 and a second connection unit 145. As illustrated in FIG. 1, the second sensing unit electrodes 142 may be arranged so as not to overlap with the first sensing unit electrodes 112 in a plane direction.

For example, the second sensing unit electrodes 142 are connected to each other by the second connection parts 145 and may be arranged along the second direction. Accordingly, a second sensing electrode row extending in the second direction may be defined. Also, a plurality of the second sensing electrode rows may be arranged in the first direction.

According to example embodiments, the second connection unit 145 and the second sensing electrode unit electrodes 142 may be integrally connected to each other to be provided as a substantially single member.

The second electrode layer 140 may further include second traces 147. According to example embodiments, the second traces 147 may branch and extend from one end of each of the second sensing electrode rows.

The intermediate traces 130 and the second traces 147 may be located on the same layer or on the same level. According to exemplary embodiments, the intermediate traces 130 and the second traces 147 extend on the top surface of the insulating layer 120 and are spaced apart from each other by one end of the touch sensor or insulating layer 120. Can.

For example, the distal ends of the intermediate traces 130 and the second traces 147 are aggregated together within the one end of the touch sensor or insulating layer 120, for example, a flexible printed circuit board (FPCB). A pad area for bonding or connection with the circuit connection structure can be defined.

In some embodiments, the capping layer 150 may be formed on the distal ends of the intermediate traces 130 and the second traces 147. The capping layer 150 is provided as a pad portion or a terminal portion for bonding with the circuit connection structure, and may protect the end portions of traces during the bonding process.

For example, a conductive intermediary structure such as an anisotropic conductive film (ACF) may be inserted between the capping layer 150 and the circuit connecting structure during the bonding process.

For example, the capping layer 150 includes transparent conductive oxides such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), and cadmium tin oxide (CTO). It can contain.

In some embodiments, a passivation layer (not shown) is formed on the insulating layer 120, for example, to cover the second electrode layer 140 and the intermediate traces 130. The passivation layer may be partially removed from the pad area to expose the capping layer 150 for the bonding process.

The touch sensor according to the exemplary embodiments described above may be used as a high resolution sensor such as a fingerprint sensor. For example, the width or pitch of the

sensing unit electrodes

112 and 142 may be 100 μm or less, preferably 70 μm or less, and more preferably 50 μm or less.

By forming the fine pitch or width of the

sensing unit electrodes

112 and 142 in different layers, it is possible to easily arrange the unit electrodes with high density or high density by securing a patterning limit or alignment margin.

In addition, since the bonding process for the first and

second traces

117 and 147 can be performed on the same layer by using the intermediate traces 130, connection with the circuit connection structure can be easily implemented.

1 to 3, the first electrode layer 110 is disposed on the base layer 100, and the second electrode layer 140 is disposed and illustrated on the first electrode layer 110.

However, in some embodiments, the second electrode layer 140 is disposed on the base layer 100 first, and the insulating layer 120 may cover the second electrode layer 140. The first electrode layer 110 may be formed on the insulating layer 120.

In this case, the intermediary traces 130 and the second traces 147 are disposed on the base layer 100 together, and the first traces 117 and the intermediary traces 130 are respectively through the contact 125. It can be electrically connected.

Referring to FIG. 4, the width of the first trace (the first width in the second direction) W1 branched from the first sensing electrode row including the first sensing unit electrodes 112 may satisfy Equation 1 below. Can.

[Equation 1]

0.1P ≤ W1 <2P

In Equation 1, P is the pitch of the first sensing electrode rows.

As described above, according to exemplary embodiments, alignment margins between adjacent first traces 117 in the second direction are alternately arranged on both sides of the touch sensor of the first traces 117. Can increase

Accordingly, the width of the first trace 117 can be relatively increased as expressed by Equation 1, and the channel resistance through the first sensing unit electrode 112 or the first sensing electrode row can be lowered. When the first width W1 is less than 0.1P, the channel resistance may be excessively increased.

In the connection region C shown in FIG. 4, the first trace 117 and the intermediate trace 130 may be electrically connected through the contact 125. The width of the intermediate trace 130 in the connection region C may also be increased to reduce contact resistance.

In some embodiments, the width in the connection area C of the intermediate trace 130 may also satisfy Equation 1 and may be expressed as the first width W1.

The mediation trace 130 may include a first portion 130a and a second portion 130b. The first portion 130a may refer to a portion connected to the first trace 117 and the connection region C and extending in the first direction. The second portion 130b may refer to a portion that is bent from the end of the first portion 130a and extends in the second direction.

In some embodiments, the width W1 of the first portion 130a of the intermediate trace 130 may be greater than the width (second width in the first direction) W2 of the second portion 130b. . As described above, the channel resistance may be reduced by increasing the width of the first portion 130a by utilizing the alignment margin secured through the alternating arrangement of traces.

As described above, the touch sensor may be applied as a fingerprint sensor, and the interval P between neighboring sensing unit electrodes may be 100 μm or less. The sheet resistance of the sensing unit electrode may be about 0.05 to 10 mm 2 /□, preferably about 0.05 to 5 mm 2 /□, and more preferably about 0.05 to 3 mm 2 /□.

Fig. 5 is a partially enlarged plan view showing a touch sensor according to some example embodiments. Detailed descriptions of the structures and/or structures substantially the same or similar to those described with reference to FIG. 4 are omitted.

Referring to FIG. 5, each of the first sensing electrode row and the second sensing electrode column may include at least one sub-electrode line.

For example, each of the first sensing electrode rows 113 includes a plurality of first sub electrode lines 111 extending in the first direction, and the second sensing electrode column 143 includes a plurality of second subs. Electrode lines 141 may be included.

In some embodiments, the ends of the plurality of first sub-electrode lines 111 extending in the first direction are parallel, for example, by the first merging unit 119 extending in the second direction. Connected to the first sensing electrode row 113 may be defined. In addition, a plurality of second sub-electrode lines 141 extending in the second direction are connected in parallel by a second merging unit (not shown) extending in the first direction to form a second sensing electrode column 143. Can be defined.

The first traces 117 may alternately extend from the first merging portion 119 on both sides of the touch sensor.

As described above, the width (first width in the second direction) W1 of the first trace 117 may satisfy Equation 1 below.

[Equation 1]

0.1P ≤ W1 <2P

In Equation 1, P is the pitch of the first sensing electrode rows.

Referring to FIG. 6, the window stack 250 may include a window substrate 230, a polarization layer 210, and a touch sensor 200 according to the exemplary embodiments described above.

The window substrate 230 includes, for example, a hard coating film, and in one embodiment, a light blocking pattern 235 may be formed on a peripheral portion of one surface of the window substrate 230. The light blocking pattern 235 may include, for example, a color print pattern, and may have a single layer or multi-layer structure. The bezel portion or the non-display area of the image display device may be defined by the light blocking pattern 235.

The polarizing layer 210 may include a coated polarizer or a polarizing plate. The coated polarizer may include a liquid crystal coating layer including a polymerizable liquid crystal compound and a dichroic dye. In this case, the polarization layer 210 may further include an alignment layer for imparting alignment to the liquid crystal coating layer.

For example, the polarizing plate may include a polyvinyl alcohol-based polarizer and a protective film attached to at least one surface of the polyvinyl alcohol-based polarizer.

The polarization layer 210 may be directly bonded to the one surface of the window substrate 230 or may be attached through the first point adhesive layer 220.

The touch sensor 200 may be included in the window stack 250 in the form of a film or panel. In one embodiment, the touch sensor 200 may be combined with the polarization layer 210 through the second point adhesive layer 225.

As illustrated in FIG. 6, the window substrate 230, the polarization layer 210, and the touch sensor 200 may be arranged in order from the user's viewing side. In this case, since the electrode layer of the touch sensor 200 is disposed under the polarization layer 210, the electrode visibility phenomenon can be more effectively prevented.

In one embodiment, the touch sensor 200 may be directly transferred onto the window substrate 230 or the polarization layer 210. In an embodiment, the window substrate 230, the touch sensor 200, and the polarization layer 210 may be arranged in the order of the user's view side.

The image display device may include a display panel 360 and the above-described window stack 250 coupled to the display panel 360.

The display panel 360 includes a pixel electrode 310, a pixel defining layer 320, a display layer 330, a counter electrode 340 and an encapsulation layer 350 disposed on the panel substrate 300. Can.

A pixel circuit including a thin film transistor (TFT) is formed on the panel substrate 300, and an insulating film covering the pixel circuit may be formed. The pixel electrode 310 may be electrically connected to the drain electrode of the TFT, for example, on the insulating film.

The pixel defining layer 320 is formed on the insulating layer to expose the pixel electrode 310 to define a pixel area. The display layer 330 is formed on the pixel electrode 310, and the display layer 330 may include, for example, a liquid crystal layer or an organic emission layer.

The counter electrode 340 may be disposed on the pixel defining layer 320 and the display layer 330. The counter electrode 340 may be provided as, for example, a common electrode or cathode of the image display device. An encapsulation layer 350 for protecting the display panel 360 may be stacked on the counter electrode 340.

In some embodiments, the display panel 360 and the window stack 250 may be combined through the point adhesive layer 260. For example, the thickness of the point adhesive layer 260 may be greater than the thickness of each of the first and second point

adhesive layers

220 and 225, and the viscoelasticity at -20 to 80°C may be about 0.2 MPa or less. In this case, noise from the display panel 360 can be shielded, and interfacial stress can be relaxed during bending to suppress damage to the window stack 250. In one embodiment, the viscoelasticity may be about 0.01 to 0.15MPa.

Claims

Base layer;

A first electrode layer disposed on the base layer; And

A second electrode layer disposed on a different layer from the first electrode layer on the base layer,

The first electrode layer

A plurality of first sensing electrode rows extending in a first direction parallel to the upper surface of the base layer; And

And first traces branched from each of the first sensing electrode rows and alternately distributed on both sides of the base layer,

The second electrode layer

A plurality of second sensing electrode rows parallel to the upper surface of the base layer and extending along a second direction intersecting the first direction; And

And second traces branching from the second sensing electrode rows.
The touch sensor according to claim 1, wherein the first traces are alternately connected to one end and the other ends of each of the first sensing electrode rows.
The touch sensor according to claim 2, wherein the width of the first trace satisfies Expression 1 below:

[Equation 1]

0.1P ≤ W1 <2P

(In equation 1, W1 represents the width of the first trace, P is the pitch of the first sensing electrode rows).
The touch sensor according to claim 1, further comprising an intermediary trace electrically connected to each of the first traces.
The touch sensor according to claim 4, wherein the intermediary trace includes a first portion connected to the first trace and extending from the first portion and a second portion bent from the first portion and extending in the second direction. .
The touch sensor according to claim 5, wherein a width of the first portion of the intermediate trace is greater than a width of the second portion.
The method according to claim 6, The width of the first portion of the intermediate trace satisfies the following equation 1, a touch sensor:

[Equation 1]

0.1P ≤ W1 <2P

(In equation 1, W1 represents the width of the first portion of the mediation trace, P is the pitch of the first sensing electrode rows).
The touch sensor according to claim 4, further comprising an insulating layer formed on the base layer and formed between the first electrode layer and the second electrode layer.
The touch sensor according to claim 8, wherein the intermediate traces are disposed on the same layer as the second electrode layer.
The touch sensor according to claim 9, further comprising a contact penetrating the insulating layer and connecting the intermediate trace and the first trace.
The touch sensor according to claim 9, wherein distal ends of the intermediate traces and the second traces are aggregated together on one end of the insulating layer.
The touch sensor according to claim 11, further comprising a capping layer formed on distal ends of the intermediate traces and the second traces.
The touch sensor according to claim 12, wherein the capping layer comprises a transparent conductive oxide.
The method according to claim 1, The first sensing electrode row includes a plurality of first sensing unit electrodes connected to each other along the first direction,

The second sensing electrode column includes a plurality of second sensing unit electrodes connected to each other along the second direction.
The touch sensor according to claim 14, wherein a sheet resistance of each of the first sensing unit electrode and the second sensing unit electrode is 0.05 to 10 Ω/□.
The method according to claim 14, The width of each of the first sensing unit electrode and the second sensing unit electrode is less than 100㎛, the first sensing unit electrode and the second sensing unit electrode is provided as a fingerprint sensing electrode , Touch sensor.
The method according to claim 1, The first sensing electrode row extends along the first direction and includes a plurality of first sub-electrode lines connected in parallel to each other,

The second sensing electrode row extends along the second direction and includes a plurality of second sub-electrode lines connected in parallel with each other.
The method according to claim 17, further comprising mergers defining the first sensing electrode row by connecting the first sub-electrode lines to each other, and defining the second sensing electrode column by connecting the second sub-electrode lines to each other, ,

The first traces and the second traces extend from each of the merging portions, a touch sensor.
Window substrates; And

A window stack comprising the touch sensor of claim 1.
Display panel; And

An image display device, which is stacked on the display panel and includes the touch sensor of claim 1.