TWI668620B - Touch panel and manufacture method thereof - Google Patents

Abstract

The present invention provides a touch panel including: a plurality of first bridge portions, a plurality of second bridge portions, and a plurality of traces; each trace includes at least a first trace and a second trace arranged in a stack, The first trace and the first bridge portion are formed of the same conductive layer, and the second trace and the second bridge portion are formed of another conductive layer. The invention also provides a method for manufacturing a touch panel. The traces in the touch panel of the present invention include multi-layered traces that are arranged in a stack. When one of the traces is disconnected, the electrical conduction function can be realized by the other trace; the traces of the present invention can form a bridge Parts are formed together without increasing the number of manufacturing processes.

Description

Touch panel and manufacturing method thereof

The invention relates to a touch panel and a method for manufacturing the touch panel.

Generally, in a personal digital assistant (PDA), a notebook computer, an office automation device, a medical device, or a car navigation system, a touch panel is used to provide an input means (pointing device) for the display of the device. Common touch panels include resistive, electromagnetic induction, optical, and capacitive touch panels. Among them, a capacitive type touch panel may use a change in capacitance induced between the static electricity of a human body and a transparent electrode based on an induced current to confirm a touch position. In order to detect a touch position where a finger or a stylus touches a touch panel, various capacitive touch panel technologies have been developed.

A common capacitive touch panel includes two sets of mutually perpendicular sensing strings, and each sensing string is made of a series of diamond patches connected to each other by a conductive rectangular narrow band (bridge). One or both ends of each sensing string are each electrically connected to a trace group by a trace. In addition, it may further include a control circuit for: providing an excitation signal to each sensing series through a corresponding wiring group; when the surface of the capacitive touch panel is touched, the control circuit receives the slave signal. Sense the sensed signal generated by the series; and determine the touched position based on the position of the affected diamond pieces in each series.

With the development of electronic technology, people's requirements for electronic products have continued to increase. In order to pursue a larger display window at a fixed size and make the product more beautiful, the narrow frame is the current industry design trend. However, when the size of the peripheral area of the touch panel is reduced, the routing area of the touch panel is also reduced. Limited by the need to reduce the line width of the wiring in the peripheral area, the thinner the line width of the wiring, the more likely to be broken, leading to poor yield.

In view of this, it is necessary to provide a touch panel whose wiring is not easily broken.

A touch panel includes: a plurality of first sensing electrodes, a plurality of second sensing electrodes, a plurality of first bridges electrically connected between two adjacent first sensing electrodes, and a plurality of electrical sensors. A second bridge portion between two adjacent second sensing electrodes, and a plurality of traces electrically connecting the first sensing electrode and the second sensing electrode to a driving circuit, respectively; Each trace includes at least a first trace and a second trace that are electrically connected to each other and are stacked. The first trace and the first bridge are formed of the same conductive layer, and the second trace is formed. And the second bridge portion is formed by another conductive layer.

The invention also provides a method for manufacturing a touch panel.

A method for manufacturing a touch panel includes: providing a substrate to form a first conductive layer on the substrate; patterning the first conductive layer to form a plurality of first bridge portions and a plurality of first traces; and forming a second A conductive layer, patterning the second conductive layer to form a plurality of second bridge portions and a plurality of second traces, the second traces covering the first traces; and patterning the first conductive layer Or when the second conductive layer is formed, a plurality of first sensing electrodes and a plurality of second sensing electrodes are formed; each first bridging portion is electrically connected to two adjacent first sensing electrodes, and each second The bridging portion is electrically connected to the adjacent second sensing electrodes; each first trace and the second trace covering it form a trace electrically connected to the first sensing electrode or the second sensing electrode.

Compared with the conventional technology, the traces in the touch panel of the present invention include a first trace and a second trace that are arranged in a stack. When one of the traces is disconnected, electricity can be achieved through the other trace. And a conductive function; and the first wiring and the first bridge portion and / or the sensing electrode (including the first sensing electrode and the second sensing electrode) are formed by the same conductive layer, and the second wiring With the second bridge and / or The sensing electrode (including the first sensing electrode and the second sensing electrode) is formed by another conductive layer, that is, the wiring of the present invention can be formed together when the sensing electrode or the bridge portion is formed, without increasing the manufacturing process. .

100‧‧‧ touch panel

101‧‧‧Central District

102‧‧‧Peripheral area

11‧‧‧ substrate

12‧‧‧ first sensing electrode series

121‧‧‧first sensing electrode

13‧‧‧Second sensing electrode series

131‧‧‧Second sensing electrode

14‧‧‧First Bridge

15‧‧‧Second Bridge Section

16‧‧‧ Insulation

161‧‧‧via

17‧‧‧ route

171‧‧‧first route

1711‧‧‧The first sub-route

172‧‧‧Second Route

1721‧‧‧Second Sub Route

173‧‧‧Third Route

1731‧‧‧The third sub-route

18‧‧‧Drive circuit

110‧‧‧first conductive layer

120‧‧‧Second conductive layer

FIG. 1 is a schematic plan view of a touch panel according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. 1.

FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 1.

4 is a schematic cross-sectional structure diagram of a touch panel according to a second embodiment of the present invention.

FIG. 5 is a schematic plan view of a touch panel according to a third embodiment of the present invention.

6 is a schematic cross-sectional structure diagram of a touch panel according to a third embodiment of the present invention.

7 to 10 are schematic cross-sectional structural diagrams of different steps in a method of manufacturing a touch panel according to the first embodiment of the present invention.

11 to 15 are cross-sectional structural diagrams of different steps in a method of manufacturing a touch panel according to a third embodiment of the present invention.

The drawings show embodiments of the present invention, and the present invention may be implemented in many different forms, and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, regions, layers and / or sections, such elements, regions, layers and / or sections should not be limited to these terms. These terms are only used to distinguish one element, region, layer and / or part from another element, region, Layers and / or sections. Accordingly, a first element, region, layer, and / or section discussed below can be termed a second element, region, layer, and / or section without departing from the teachings of the present invention.

Embodiments of the present invention are described here with reference to cross-sectional views, which are schematic diagrams of idealized embodiments (and intermediate structures) of the present invention. Thus, variations in the shapes of the illustrations as a result of manufacturing processes and / or tolerances are to be expected. Therefore, the embodiments of the present invention should not be interpreted as being limited to the specific shape of the region illustrated here, but should include deviations in the shape due to, for example, manufacturing. The regions shown in the figures are only schematic, and their shapes are not intended to illustrate the actual shape of the device, and are not intended to limit the scope of the invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in the general dictionary should be interpreted to have meanings consistent with their meaning in the context of the relevant field, and should not be interpreted in an overideal or overly formal sense Unless explicitly defined in this article.

Please refer to FIG. 1, which is a schematic plan view of a touch panel 100 according to a first embodiment of the present invention. In this embodiment, the touch panel 100 is a capacitive touch panel. The touch panel 100 defines a central area 101 for sensing a touch operation and a peripheral area 102 surrounding the central area 101. The touch panel 100 includes a substrate 11 and a first sensing electrode series 12 and a second sensing electrode series 13 which are formed on the same surface of the substrate 11 and located in the central region 101 and are insulated from each other.

For convenience of description, an insulating layer that insulates the first sensing electrode series 12 and the second sensing electrode series 13 from each other is omitted in FIG. 1. The first sensing electrode series 12 extends in a first direction (Y direction in FIG. 1), the second sensing electrode series 13 extends in a second direction (X direction in FIG. 1), and the first direction intersects the second direction . In this embodiment, the first direction and the second direction are perpendicular to each other, but are not limited thereto. In other embodiments, the first sensing electrode series 12 and the second sensing electrode series 13 may also be arranged in other forms. For example, the first sensing electrode series 12 and the second sensing electrode series 13 intersect at other angles.

The first sensing electrode series 12 includes a plurality of first sensing electrodes 121, and the second sensing electrode series 13 includes a plurality of second sensing electrodes 131. The plurality of first sensing electrodes 121 and the plurality of second sensing electrodes 131 are insulated from each other. One of the first sensing electrode 121 and the second sensing electrode 131 is a touch driving electrode (Tx), and the other is a touch sensing electrode (Rx).

In each first sensing electrode series 12, each adjacent two first sensing electrodes 121 are electrically connected by a first bridge portion 14. In each second sensing electrode series 13, each adjacent The two second sensing electrodes 131 are electrically connected through a second bridge portion 15. Please refer to FIG. 2 together. Each first bridge portion 14 spans at least partially overlaps the second bridge portion 15 across the second bridge portion 15, and each of the first bridge portions 14 and its corresponding second bridge portion 15 They are insulated and separated by an insulating layer 16.

As shown in FIG. 1, the touch panel 100 further includes a plurality of traces 17 located in the peripheral area 102. One or both ends of each of the first sensing electrode series 12 and each of the second sensing electrode series 13 are provided. It is electrically connected to a driving circuit 18 through a trace 17.

As shown in FIG. 2, FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. 1. Each of the traces 17 includes a first trace 171 and a second trace 172 that are stacked, and the first trace 171 and the second trace 172 of each trace 17 overlap each other and at least partially directly contact each other. In this embodiment, both the first trace 171 and the second trace 172 of each trace 17 completely overlap and directly contact each other. Since the trace 17 of the touch panel 100 in this embodiment includes a first trace 171 and a second trace 172 that are stacked, therefore, when one of the first trace 171 or the second trace 172 occurs, When the wire is disconnected, the first sensing electrode 121 or the second sensing electrode 131 may be electrically connected to the driving circuit 18 through the other one of the wirings 17 to avoid a bad disconnection of the wirings 17.

As shown in FIGS. 2 and 3, FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 1. In this embodiment, the first sensing electrode 121, the second sensing electrode 131, the first bridge portion 14 and the first trace 171 are directly formed on one surface of the substrate 11 and are formed of the same conductive layer, that is, The first sensing electrode 121, the second sensing electrode 131, the first bridge portion 14 and the first wiring 171 are disposed in the same layer.

The insulating layer 16 covers the first sensing electrode 121, the second sensing electrode 131 and the first bridge portion 14. The insulating layer 16 is formed with a plurality of via holes 161 that expose the second sensing electrode 131. The second bridge portion 15 is formed on a side of the insulating layer 16 away from the first bridge portion 14 (or the substrate 11), and electrically connects two adjacent second sensing electrodes 131 through a via 161. The second bridge portion 15 and the second trace 172 are formed of the same conductive layer.

As shown in FIG. 2, in this embodiment, the touch panel 100 includes a first conductive layer 110, and the first conductive layer 110 includes a first sensing electrode 121, a second sensing electrode 131, a first bridge portion 14, and a first A trace 171; the touch panel 100 includes a second conductive layer 120, and the second conductive layer 120 includes a second bridge portion 15 and a second trace 172.

In this embodiment, the first sensing electrode 121, the second sensing electrode 131, the first bridge portion 14 and the first trace 171 are formed in a same photolithography process. The second bridge portion 15 and the second trace 172 are formed in the same photolithography process.

In other embodiments, although the first trace 171 and the second trace 172 are located in different conductive layers, they may be formed together in the same photolithography process. In one embodiment, when the second bridge portion 15 is formed, the conductive layers where the first and second traces 171 and 172 are located are etched together to form the first and second traces 171 and 172. The first trace 171 and the second trace 172 may be in the same photolithography process as at least one of the first sensing electrode 121, the second sensing electrode 131, the first bridge portion 14 and the second bridge portion 15 It is not necessary to form the first trace 171 and the second trace 172 by an additional photolithography process.

In this embodiment, the first sensing electrode 121 is a touch driving electrode, and the second sensing electrode 131 is a touch sensing electrode. The driving circuit 18 inputs a driving signal to the first sensing electrodes 121, and corresponding sensing signals are also generated on the second sensing electrodes 131. When a touch occurs, the touch point will generate electrode discharge, change in dielectric constant between the electrodes, etc., which will cause the capacitance there to change. Therefore, when the corresponding first sensing electrode 121 is scanned, The sensing signal on the second sensing electrode 131 corresponding to the touch point will also change, so that the touch position can be determined and touch can be realized.

In one embodiment, the material of the substrate 11 may be selected from transparent glass or transparent quartz; the material of the substrate 11 may also be selected from transparent plastic. In one embodiment, it may be selected from polyether fluorene (PES), poly One or more of ethylene naphthalate (PEN), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), polyethylene terephthalate (PET); In other embodiments, the material of the substrate 11 may be ceramic or silicon. The material of the substrate 11 may be flexible.

The first sensing electrode 121, the second sensing electrode 131, the first bridge portion 14 and the first wiring 171 are all conductive materials. The first sensing electrode 121, the second sensing electrode 131, the first bridge portion 14 and The material of the first trace 171 may be a transparent conductive material. In one embodiment, the transparent conductive material may be one or more of indium tin oxide (ITO) and zinc zinc oxide (AZO).

The second bridge portion 15 and the second trace 172 are both conductive materials, and the materials of the second bridge portion 15 and the second trace 172 may be transparent conductive materials. In one embodiment, the transparent conductive material may be one or more of indium tin oxide (ITO) and zinc zinc oxide (AZO). In an embodiment, the material of the second bridge portion 15 and the second trace 172 may be metal, and may be selected from aluminum (Al), silver (Ag), gold (Au), cobalt (Co), and chromium (Cr). , Copper (Cu), indium (In), manganese (Mn), molybdenum (Mo), nickel (Ni), neodymium (Nd), palladium (Pd), platinum (Pt), titanium (Ti), tungsten (W) And zinc (Zn).

For the convenience of description, in the following embodiments, the components having the same structure and functions as those in the first embodiment use the same component symbols.

Please refer to FIG. 4, which is a schematic cross-sectional structure diagram of a touch panel 100 according to a second embodiment of the present invention. The structure of the touch panel 100 in this embodiment is basically the same as that of the touch panel 100 in the first embodiment, except that in this embodiment, each trace 17 further includes a first trace 171 and a second trace. The third traces 173 stacked in 172 are electrically connected to the first and second traces 171 and 172. The third trace 173 is disposed between the first trace 171 and the second trace 172 corresponding thereto. The third wiring 173 can further improve the disconnection of the wiring 17. In one embodiment, the third trace 173 is metal, so as to reduce the resistance of the trace 17 and improve the sensing sensitivity of the touch panel 100.

In an embodiment, at least one of the first trace 171, the second trace 172, and the third trace 173 includes a plurality of sub-traces disposed at intervals. In this embodiment, each first trace 171 includes a plurality of first sub-traces 1711 spaced apart, and the third trace 173 includes a plurality of third sub-traces 1731 spaced apart.

FIG. 4 shows two first sub-traces 1711 and two third sub-traces 1731. In other embodiments, each second trace 172 may also include a plurality of second sub-traces (not shown) disposed at intervals. In an embodiment, each of the first sub-trace 1711 and each of the third sub-trace 1731 can independently implement the electrical conduction function, that is, each of the first sub-trace 1711 and each of the third sub-trace 1731 It can be used separately for electrically conducting the corresponding sensing electrode series and the driving circuit 18.

Although the third trace 173 in this embodiment is located between the first trace 171 and the second trace 172, the position of the third trace 173 is not limited, and may be set at other positions according to actual needs. In an embodiment, the third trace 173 may cover the surface of the second trace 172 away from the first trace 171, or the third trace 173 may cover the surface of the first trace 171 away from the second trace 172.

Please refer to FIGS. 5 and 6, which are schematic plan views of a touch panel 100 according to a third embodiment of the present invention. FIG. 6 is a schematic cross-sectional structure diagram of a touch panel 100 according to a third embodiment of the present invention. In this embodiment, the second bridge portion 15 and the second trace 172 are formed on the same surface of the substrate 11. The insulating layer 16 covers the second bridge portion 15 and exposes at least a portion of the second bridge portion 15 through the via hole 161. The first sensing electrode 121, the second sensing electrode 131, and the first bridge portion 14 cover the insulating layer 16. The second bridge portion 15 is electrically connected to two adjacent second sensing electrodes 131 through the via 161. .

In this embodiment, the first trace 171 covers a surface of the second trace 171 away from the substrate 11. The touch panel 100 further includes a third trace 173. The third trace 173 covers a surface of the first trace 171 away from the second trace 172. The third trace 173 can further improve the disconnection of the trace 17. The third trace 173 is electrically connected to the first trace 171 and the second trace 172. In an embodiment, the third trace 173 is metal, which can reduce the resistance of the trace 17 and improve the sensing sensitivity of the touch panel 100.

In this embodiment, the second trace 172 includes a plurality of first sub-traces 1721. Each second sub-trace 1721 can independently implement the electrical conduction function, that is, each second sub-trace 1721 can be used separately for electrically conducting the corresponding sensing electrode string and driving circuit 18, but it is not limited to this. .

Please refer to FIG. 7 to FIG. 10, which are schematic cross-sectional structure diagrams of different steps in a method of manufacturing the touch panel 100 according to the first embodiment of the present invention.

Step 1: As shown in FIG. 7, a substrate 11 is provided, and a first conductive layer 110 is formed on the substrate 11.

Step 2: As shown in FIG. 8, the first conductive layer 110 is patterned to form a plurality of first sensing electrodes (not shown), a plurality of second sensing electrodes 131, a plurality of first bridge portions 14, and a plurality of first sensing electrodes (not shown). A trace 171, the first sensing electrode and the second sensing electrode 131 are insulated from each other, each first bridge portion 14 is connected to each adjacent two of the first sensing electrodes, and the first trace 171 is electrically The first sensing electrode 121 or the second sensing electrode 131 is sexually connected.

The patterning method is not limited. In this embodiment, the first conductive layer 110 can be patterned by a process such as exposure and development.

In a display device with a touch function, in order not to affect the display effect, the first conductive layer 110 is a transparent conductive material. In one embodiment, the transparent conductive material may be one or more of indium tin oxide (ITO) and zinc zinc oxide (AZO).

In this embodiment, the first trace 171 is formed during the patterning of the first conductive layer 110. Therefore, before forming the second trace 172 described later (as in FIG. 10), the first trace 171 may be Defects of the substrate are preferentially reflected (for example, there are problems such as dirt and foreign matter on the substrate). In other embodiments, the first conductive line 171 may not be formed together when the first bridge portion 14 is formed, but may be patterned together when the second conductive layer 120 is patterned later to form the second conductive line 172. 110 was formed.

Step 3: As shown in FIG. 9, an insulating layer 16 covering at least the first bridge portion 14 is formed, and the insulating layer 16 exposes at least part of the second sensing electrode 131.

In this embodiment, the insulating layer 16 covers the first sensing electrode 121, the second sensing electrode 131 and the first bridge portion 14. The insulating layer 16 includes a plurality of via holes 161 that expose the second sensing electrode 131. In other embodiments, the insulating layer 16 may cover only the first bridge portion as long as it can insulate the first bridge portion and a second bridge portion (not shown) described later.

Step 3: As shown in FIG. 10, a second conductive layer 120 covering the insulating layer 16 is formed, and the second conductive layer 120 is patterned to form a plurality of second bridge portions 15 and a plurality of second traces 172. The trace 172 covers a surface of the first trace 171 away from the substrate 11. Each second bridge portion 15 is electrically connected to every two adjacent second sensing electrodes 131. Each first trace 171 and its corresponding The second trace 172 forms a trace 17 electrically connected to the first sensing electrode or the second sensing electrode.

In this embodiment, each second bridge portion 15 is electrically connected to each adjacent two second sensing electrodes 131 through a via 161.

It can be understood that the method of manufacturing the touch panel 100 according to the second embodiment of the present invention is similar to the method of manufacturing the touch panel 100 according to the first embodiment, and compared with the method of manufacturing the touch panel 100 according to the first embodiment, manufacturing The method of the touch panel 100 of the second embodiment further includes: before forming the second conductive layer 120, forming a third trace 173 electrically connected to the first trace 171; the third trace and the first trace 171 Laminated and at least partially in direct contact. Preferably, the third trace 173 is metal.

In addition, the method for manufacturing the touch panel 100 according to the third embodiment of the present invention is similar to the method for manufacturing the touch panel 100 according to the first embodiment of the present invention. However, the first sensing electrode 121 and the second sensing electrode 131 are insulated from each other. The order in which the layers 16 are formed is different. Specifically, please refer to FIG. 11 to FIG. 15, which are schematic cross-sectional structure diagrams of different steps in a method of manufacturing the touch panel 100 according to the third embodiment of the present invention.

Step 1: As shown in FIG. 11, a substrate 11 is provided, and a second conductive layer 120 is formed on the substrate 11.

Step 2: As shown in FIG. 12, the second conductive layer 120 is patterned to form a plurality of second bridge portions 15 and a plurality of second traces 172.

In this embodiment, the step of patterning and forming the second trace 172 includes patterning and forming a plurality of second sub-traces 1721, and each second trace 172 includes a plurality of second sub-traces 1721. Each of the second sub-traces 1721 can independently implement the electrical conduction function, but is not limited thereto.

Step 3: As shown in FIG. 13, an insulating layer 16 covering at least the second bridge portion 14 is formed, and the insulating layer 16 exposes at least a portion of the second bridge portion 15. In this embodiment, the insulating layer 16 includes a plurality of via holes 161 that expose both ends of each second bridge portion 15.

Step 4: As shown in FIG. 14, the first conductive layer 110 covering the insulating layer 16 is formed and the first conductive layer 110 is patterned to form a plurality of first sensing electrodes (not shown) and a plurality of second sensing electrodes 131. , A plurality of first bridge portions 14 and a plurality of first traces 171. Each first trace 171 covers a surface of the corresponding second trace 172 away from the substrate 11, the first sensing electrode and the second sensing electrode 131 are insulated from each other, and each first bridge portion 14 is electrically connected to each Two adjacent first sensing electrodes, each second bridge portion 15 is electrically connected to each adjacent two second sensing electrodes 131, each first trace 171 and one second trace 172 A trace 17 electrically connected to the first sensing electrode or the second sensing electrode 131 is formed.

Step 5: As shown in FIG. 15, a third trace 173 covering the first trace 171 and away from the second trace 172 is formed.

The third wiring 173 can further improve the disconnection of the wiring 17. Preferably, the third trace 173 is metal to reduce the resistance of the trace 17 and improve the sensing sensitivity of the touch panel 100. In other embodiments, the third trace 173 may not be formed.

The first trace 171 and the second trace 172 may be formed in the same photolithography process with at least one of the first sensing electrode, the second sensing electrode 131, the first bridge portion 14 and the second bridge portion 15 It is not necessary to form the first trace 171 and the second trace 172 by an additional photolithography process.

Since the trace 17 of the touch panel 100 includes a first trace 171 and a second trace 172 which are stacked, when one of the first trace 171 or the second trace 172 is disconnected, the By The other of the traces 17 is electrically connected to the first sensing electrode 121 or the second sensing electrode 131 to improve the disconnection of the traces 17.

The above embodiments are only used to illustrate the technical solution of the present invention, but not limited. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or equivalently replaced, and Without departing from the spirit and scope of the technical solution of the present invention.

Claims (8)

A touch panel is improved. The touch panel includes a plurality of first sensing electrodes, a plurality of second sensing electrodes, a plurality of first bridges electrically connected between two adjacent first sensing electrodes, and a plurality of first sensing portions. Electrically connected to a second bridge portion between two adjacent second sensing electrodes, and electrically connecting the first sensing electrode and the second sensing electrode to a plurality of tracks of a driving circuit, respectively Each of the traces includes at least a first trace and a second trace that are electrically connected to each other and are stacked, and the first trace and the first bridge are formed of the same conductive layer, and The second trace and the second bridge are formed by another conductive layer; each of the traces further includes a third trace electrically connected to the first trace and the second trace; The third trace is stacked with at least one of the first trace and the second trace and is at least partially in direct contact. The touch panel according to claim 1, wherein the first trace and the second trace of each trace are directly contacted at least in part. The touch panel according to claim 1, wherein a material of the third trace is metal. The touch panel according to claim 1, wherein at least one of the first trace and the second trace includes a plurality of sub-traces arranged at intervals. The touch panel according to claim 4, wherein each of the sub-tracks is electrically connected to the first sensing electrode or the second sensing electrode to the driving circuit. The touch panel according to claim 1, wherein the first sensing electrode, the second sensing electrode, the first wiring, and the first bridge portion are formed of a same conductive layer. The touch panel according to claim 6, wherein the second bridge portion and the second trace are metal. A method for manufacturing a touch panel includes: providing a substrate to form a first conductive layer on the substrate; patterning the first conductive layer to form a plurality of first bridge portions and a plurality of first traces; and forming a second A conductive layer, patterning the second conductive layer to form a plurality of second bridge portions and a plurality of second traces, and the second traces cover the first traces; A third trace electrically connected to at least one of the second traces; the third trace is stacked with at least one of the first trace and the second trace electrically connected to the third trace Provided and at least partially in direct contact; and when the first conductive layer or the second conductive layer is patterned, a plurality of first sensing electrodes and a plurality of second sensing electrodes are formed; each of the first The bridge portion is electrically connected to two adjacent first sensing electrodes, and each of the second bridge portions is electrically connected to the adjacent second sensing electrode; each of the first traces Forming a line electrically connected to the first sensing electrode or the second sensing electrode with the second trace covering it Line.