TW201917551A - Touch panel and manufacture method thereof - Google Patents

Abstract

The present invention provides a touch panel including: a plurality of first sensing electrodes and a plurality of second sensing electrodes, each two adjacent first sensing electrodes are electrically connected by a first bridge portion. The touch panel Further including an insulating layer at least covering the first bridging portion. A plurality of conductive second bridging portions and a plurality of non-conductive portions connected to and surrounding the plurality of second bridging portions formed on a side of the insulating layer away from a substrate. Each two second sensing electrodes are electrically connected by one second bridge portion. The plurality of second bridging portions and the non-conductive portions are formed by a same material layer. The present invention can avoid a large surface height difference of the touch panel.

Description

Touch panel and manufacturing method thereof

The invention relates to a touch panel and a method for manufacturing the touch panel, and in particular, to a touch panel applied to a display device.

Generally, in a personal digital assistant (PDA), a notebook computer, an office automation device, a medical device, or a car navigation system, etc., a touch panel is used to provide an input means (pointing device) for the display of the device. In addition to resistive, electromagnetic induction, and optical, capacitive types have been used as common 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 lead set by a lead. In addition, it may further include a control circuit for: providing an excitation signal to each sensing series through a corresponding lead group; when the surface is touched, the capacitive touch panel receives the generated from the sensing series Sensing signals; and determining a touched position based on the positions of the affected diamond pieces in each string.

Please refer to FIG. 1, which is a schematic cross-sectional view of a conventional capacitive touch panel 100. The two sets of conductive elements 12 of the capacitive touch panel 100 can be formed on the same surface of a substrate 11 with the same conductive layer, and connected to the corresponding capacitive sensing strings through different sets of bridges. In the column. One set of the first bridging portion 13 may be formed of the same conductive layer as the conductive element 12; the other set of the second bridging portion 14 may be formed on the first insulating layer 15 on the conductive layer, and through the first insulating layer A first via 16 provided on 15 is connected to the corresponding conductive element 12. In order to avoid the short circuit problem caused by different second bridges 14 being connected to each other, the second bridges 14 on the first insulating layer 15 are usually only provided to cover two adjacent first vias 16. The area of the second bridge portion 14 is increased. The material of the second bridge portion 14 is usually a conductive material such as indium tin oxide (ITO) or metal. However, taking metal as an example, if the area of the second bridge portion 14 is too large, since the second bridge portion 14 does not transmit light and blocks light, the visual effect of the touch panel 100 is generally deteriorated. If ITO is used as the second bridge portion 14, although the second bridge portion 14 is transparent, the second bridge portion 14 is partially covered with the second bridge portion 14 and the rest of the area is not covered with the second bridge portion 14. It has a large surface segment difference with its surrounding area, and it is different from the surrounding area material, which affects the reflectance and chromatic aberration. Therefore, when the touch panel 100 is applied to a display device with a touch function, the display effect will be greatly affected.

In view of this, it is necessary to provide a touch panel with a small influence on the display effect.

A touch panel includes a substrate and a plurality of first sensing electrode strings extending along a first direction and a plurality of second sensing electrode strings extending along a second direction formed on the substrate. The test electrode series is electrically isolated from the second sensing electrode series. Each first sensing electrode series includes a plurality of first sensing electrodes connected in sequence, and each second sensing electrode series includes a serial connection. A plurality of second sensing electrodes; two adjacent first sensing electrodes in each first sensing electrode string are connected by a first bridge portion;

The touch panel further includes an insulating layer covering at least the first bridge portion, and

A conductive plurality of second bridge portions formed on a side of the insulating layer away from the substrate and a non-conductive portion connected to and surrounding the plurality of second bridge portions; two adjacent ones of each second sensing electrode string The second sensing electrodes are electrically connected through a second bridge portion;

The plurality of second bridge portions and the non-conductive portion are formed of a same material layer.

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

A method for manufacturing a touch panel includes:

Providing a substrate on which a conductive layer and a metal layer that are stacked are sequentially formed;

Shape etching the conductive layer and the metal layer to form a patterned conductive layer and a patterned metal layer;

Etching part of the patterned metal layer to form a first sensing electrode, a second sensing electrode, and a first bridge portion;

Forming an insulating layer, the insulating layer covering at least the first bridge portion;

Forming a material layer covering the side of the touch panel where the insulating layer is formed;

Causing a portion of the material layer to lose its conductive ability to form a non-conductive portion;

A portion of the material layer having a conductive ability forms a second bridge portion.

Compared with the conventional technology, the second bridge portion of the touch panel of the present invention has a non-conductive portion connected to and surrounding the second bridge portion. The second bridge portion and the non-conductive portion are formed of the same material layer, and therefore can be improved. Part of the area is covered with the second bridge part, part of the area is not covered with other materials or covered with other heights, and the material is different from the second bridge part, resulting in a large surface segment difference between the second bridge part and the surrounding area, and with the surrounding area. The area materials are different, which will affect the reflectance and chromatic aberration, that is, even if the area of the second bridge portion of the touch panel of the present invention is increased, the reflectance and chromatic aberration of the touch panel will not be excessively large. Impact.

The drawings show embodiments of the present invention, and the present invention can 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. For clarity, the dimensions of layers and regions have been exaggerated in the figure.

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

The proper nouns used herein are only used to describe specific embodiments and are not intended to limit the present invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that when the terms "comprising" and "including" are used in the specification, the presence of stated features, integers, steps, operations, elements and / or components is indicated, but one or more other features, integers, The presence of steps, operations, elements and / or components.

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 schematic only, 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 over-ideal or over-formal meaning Unless explicitly defined in this article.

Please refer to FIG. 2, which is a schematic plan view of a touch panel 200 according to a first embodiment of the present invention. In this embodiment, the touch panel 200 is a capacitive touch panel. The touch panel defines a central area 201 for sensing touch operations and a peripheral area 202 surrounding the central area 201. The touch panel 200 includes a substrate 21, a first sensing electrode series 22 and a second sensing electrode series 23 which are formed on the same surface of the substrate 21 and are insulated from each other in the central region 201. The first sensing electrode series 22 extends in a first direction (Y direction in FIG. 2), and the second sensing electrode series 23 extends in a second direction (X direction in FIG. 2). The 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 22 and the second sensing electrode series 23 It can also be arranged in other forms. The first sensing electrode series 22 includes a plurality of first sensing electrodes 221, and the second sensing electrode series 23 includes a plurality of second sensing electrodes 231. Optionally, one of the first sensing electrode 221 and the second sensing electrode 231 is a touch driving electrode (Tx), and the other is a touch sensing electrode (Rx). Adjacent first sensing electrodes 221 in each first sensing electrode string 22 are electrically connected by a first bridge portion 24, and adjacent second sensing electrodes 231 in each second sensing electrode string 23 are formed by The second bridge portion 251 is electrically connected.

Specifically, in this embodiment, the first sensing electrode 221 is a touch driving electrode, and the second sensing electrode 231 is a touch sensing electrode. A driving circuit (not shown) inputs a driving signal to the first sensing electrodes 221, and corresponding sensing signals are also generated on the second sensing electrodes 231. 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 221 is scanned, The sensing signal on the second sensing electrode 231 corresponding to the touch point will also change, so that the touch position can be determined and touch can be achieved.

Please refer to FIG. 3 together. FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2. In this embodiment, the first bridging portion 24 is formed on the same surface of the substrate 21 together with the first sensing electrode 221 and the second sensing electrode 231 and is disposed on the same layer. The touch panel 200 further includes a second insulating layer 26 covering the first sensing electrode 221, the second sensing electrode 231 and the first bridge portion 24. The second insulating layer 26 includes a plurality of second via holes 27 exposing the second sensing electrode 231. Preferably, as shown in FIG. 2, the second insulating layer 26 is provided with two unconnected second via holes 27 corresponding to each of the second sensing electrodes 231 which are not located at the end of the second sensing electrode string 23. The second sensing electrode 231 at the end of the second sensing electrode series 23 has a second via hole 27.

The touch panel 200 further includes a first material layer 25 that substantially covers the central region 201. Specifically, in this embodiment, the second insulating layer 26 is completely covered by the first material layer. The first material layer 25 includes a plurality of second bridge portions 251 having a conductive function and a non-conductive portion 253 having no conductive function. The non-conductive portions 253 are connected to and surround the plurality of second bridge portions 251. Specifically, every two adjacent second sensing electrodes 231 located in the same series are electrically connected by the second bridge portion 251 through the two corresponding second vias 27. The non-conductive portion 253 covers an area of the second insulating layer 26 that is not covered by the second bridge portion 251. Preferably, the first material layer 25 may be a conductive polymer material, and the non-conductive portion 253 of the first material layer 25 loses its conductive function after applying an inactivating liquid such as immersion, spraying, or the like. In this embodiment, a first material layer 25 including a second bridge portion 251 and a non-conductive portion 253 is formed on the second insulating layer 26. The first material layer 25 is a continuous layer, and the second bridge The part 251 and the non-conductive part 253 are made of the same material and have the same height, which can improve the second insulating layer 26 because part of the area is covered with the second bridge part 251, part of the area is not covered with other materials or covered with other heights and materials A material layer different from the second bridge portion 251 causes a large surface segment difference between the second bridge portion 251 and a region around the second bridge portion 251 and a material difference from the region around the second bridge portion 251, which affects reflectance and chromatic aberration. Specifically, the touch panel 200 that substantially covers the central region 201 with the first material layer 25 has a reflectance ΔR <0.8 and a color difference value ΔE <3. Since the central region 201 of the touch panel 200 of the present invention is basically covered with the first material layer 25, a part of the first material layer 25 has a conductive function as the second bridge portion 251, and the rest does not have a conductive function as a non-conductive Therefore, even if the area of the second bridge portion 251 of the touch panel 200 of the present invention is increased, the reflectance and chromatic aberration of the touch panel 200 will not be greatly affected.

Please refer to FIG. 2 and FIG. 3 again. The peripheral region 202 of the touch panel 200 includes a plurality of wires 28 connecting each of the first sensing electrode series 22 and the second sensing electrode series 23. One end of each trace 28 is respectively connected to one end of a first sensing electrode series 22 or a second sensing electrode series 23. In this embodiment, in order to strengthen the electrical conductivity of the trace 28, the trace 28 has a two-layer structure, which includes a sub-layer 281 near the substrate 21 and a metal layer 204 stacked on the sub-layer 281. The sub-layer 281 may be formed from the same conductive layer 203 as the first sensing electrode 221, the second sensing electrode 231, and the first bridge portion 24. When the touch panel 200 is applied to a display device (not shown) with a touch function, the central region 201 corresponds to a display screen of a display panel (not shown) of the display device, and the conductive layer 203 may preferably be a light-transmissive conductive material, such as indium tin oxide (ITO), nano-silver wire (AgNW), or poly 3,4-ethylenedioxythiophene (PEDOT). The peripheral area 202 does not affect the display function of the display device. In this embodiment, the traces 28 are collectively covered by the second insulating layer 26. If the touch panel 200 is applied to a display device that does not need to realize a display function, the conductive layer 203 is not limited to a light-transmitting conductive material, but may be other opaque conductive materials, such as copper (Cu), silver (Ag ) And other metals.

Please refer to FIG. 4, FIG. 5 and FIG. 6 together. FIG. 4 is an enlarged view of part IV of FIG. 2, FIG. 5 is a schematic cross-sectional view taken along line VV of FIG. 4, and FIG. 6 is taken along line VI-VI of FIG. 4. Schematic cross-section. As described above, one end of the wiring 28 is connected to one end of a first sensing electrode series 22 or a second sensing electrode series 23 respectively; the touch panel 200 further includes a peripheral area 202 and a connection station. The connection pad 29 at the other end of the trace 28 is described. The connection pad 29 may include a conductive layer 203, a metal layer 204, and a first material layer 25 that are sequentially stacked. The connection pad 29 is not covered by the second insulating layer 26. For the connection pad 29, the conductive layer 203 and the metal layer 204 are patterned to form a part of the connection pad 29. The first material layer 25 may not be patterned, and adjacent connections may be made by an inactivating solution. The first material layer 25 between the pads 29 forms a non-conductive portion 253 that loses the conductive ability. At this time, the first material layer 25 on the connection pad 29 still has a conductive ability. It can be understood that when the adjacent connection pads 29 are inactivated without using an inactivation solution, the first material layer 25 may be patterned using a process such as photolithography.

Please refer to FIG. 7, which is a schematic cross-sectional view of a touch panel 300 according to a second embodiment of the present invention. In this embodiment, the structure of the touch panel 300 is basically the same as the structure of the touch panel 200 of the first embodiment, and elements having the same structure and functions are not described herein again. The touch panel 300 of this embodiment includes a third insulating layer 36, which is different from the second insulating layer 26 having the second via hole 27 in the first embodiment. The third insulating layer 36 includes A plurality of island-shaped insulating portions 361 are provided between two adjacent second sensing electrodes 331 and cover the first bridge portion 34. In this embodiment, each island-shaped insulating portion 361 also covers at least a portion of two second sensing electrodes 331 adjacent to the corresponding first bridge portion 34. A first material layer 35 substantially covers the central region 201 of the touch panel 300. Specifically, the first material layer 35 covers the conductive layer 303 of the first sensing electrode series 32, the second sensing electrode series 33, and the first bridge portion 34 and the island-shaped insulating portion 361. The first material layer 35 includes a plurality of second bridge portions 351 having a conductive function and a non-conductive portion 353 having no conductive function. The non-conductive portions 353 are connected to and surround the plurality of second bridge portions 351. Specifically, each two adjacent second sensing electrodes 331 are electrically connected by a second bridge portion 351 covering the two adjacent second sensing electrodes 331. That is, the second bridge portion 351 covers at least a part of the island-shaped insulating portion 361 and two second sensing electrodes 331 adjacent to the island-shaped insulating portion 361. The area of the touch panel 300 that is not covered by the second bridge portion 351 is substantially covered by the non-conductive portion 353. Preferably, the first material layer 35 may be a conductive polymer material, and the non-conductive portion 353 of the first material layer 35 loses its conductive function after applying an inactivating liquid such as immersion, spraying, or the like. In this embodiment, the first material layer 35 is a continuous layer covering the conductive layer 303 and the third insulating layer 36, and the second bridge portion 351 is the same material as the non-conductive portion 353, The same height can improve the second bridge portion on the touch panel 300 because part of the area is covered with the second bridge portion 351, some areas are not covered with other materials, or other heights and materials are different from the second bridge portion 351. 351 has a large surface segment difference with the area around it and the material is different from the surrounding area, which affects the reflectance and chromatic aberration. Specifically, the touch panel 200 that substantially covers the central region 201 with the first material layer 25 has a reflectance ΔR <0.8 and a color difference value ΔE <3. Since the central region 201 of the touch panel 200 of the present invention is basically covered with the first material layer 25, a part of the first material layer 25 has a conductive function as the second bridge portion 251, and the rest does not have a conductive function as a non-conductive Therefore, even if the area of the second bridge portion 251 of the touch panel 200 of the present invention is increased, the reflectance and chromatic aberration of the touch panel 200 will not be greatly affected. Specifically, the reflectivity of the touch panel 300 may be less than 0.8, and the color difference may be less than 3.

The invention also provides a method for manufacturing a touch panel. The manufacturing method of the touch panel of the present invention is described below by taking the manufacturing method of the touch panel 200 of the first embodiment as an example.

Please refer to FIGS. 8 to 21, which are flowcharts of manufacturing the touch panel 200 according to the first embodiment of the present invention.

As shown in FIG. 8, a substrate 21 is provided, and a conductive layer 203 and a metal layer 204 are sequentially formed on the substrate 21 and cleaned. In a display device with a touch function, in order not to affect the display effect, the conductive layer 203 is preferably a light-transmissive conductive material, such as indium zinc oxide (ITO), nano-silver wire (AgNW), or poly 3 , 4-ethylenedioxythiophene (PEDOT). The metal layer 204 may be a suitable metal such as copper (Cu) or silver (Ag).

As shown in FIG. 9, a first photoresist layer 205 is formed, and the first photoresist layer 205 covers the metal layer 204. The material of the first photoresist layer 205 is not limited, and an appropriate first photoresist layer 205 may be selected according to actual process requirements.

As shown in FIG. 10, a portion of the first photoresist layer 205 is removed to form a first photoresist pattern 2051. Specifically, the first photoresist pattern 2051 can be obtained by a process of exposure and development. The photoresist pattern 2051 corresponds to an area of the conductive layer 203 and the metal layer 204 where a first sensing electrode 221, a second sensing electrode 231, a first bridge portion 24, a trace 28, and a connection pad 29 need to be formed.

As shown in FIG. 11, the conductive layer 203 is patterned. Using the first photoresist pattern 2051 as a photoresist, the conductive layer 203 and the metal layer 204 are etched, and it is not necessary to form the first sensing electrode 221 and the second sensing electrode in the conductive layer 203 and the metal layer 204. 231, the first bridge portion 24, the trace 28, and the connection pad 29, and after the patterned conductive layer 203 and the patterned metal layer 204 are formed, the first photoresist pattern 2051 is removed.

As shown in FIG. 12, a second photoresist layer 206 is formed to cover the substrate 21 and the patterned conductive layer 203 and the patterned metal layer 204.

As shown in FIG. 13, a portion of the second photoresist layer 206 located in the central region 201 is removed to form a second photoresist pattern 2061 located in the peripheral region 202. The second photoresist pattern 2601 covers the metal layer 204 as the trace 28 and the connection pad 29 in the peripheral region 202.

Using the second photoresist pattern 2061 as a photoresist, a portion of the metal layer 204 that is not covered by the second photoresist pattern 2061 is etched. In this step, the metal layer 204 located above the conductive layer 203 as a region of the first sensing electrode 221, the second sensing electrode 231, and the first bridge portion 24 is etched, and the conductive layer 203 forms the The first sensing electrode 221, the second sensing electrode 231, and the first bridge portion 24.

As shown in FIG. 14, the second photoresist pattern 2061 is removed.

As shown in FIG. 15, a second insulating layer 26 is formed, and the second insulating layer 26 covers at least the first bridge portion 24. In this embodiment, the second insulating layer 26 covers the first sensing electrode 221, the second sensing electrode 231, the first bridge portion 24, and the trace 28, and the second insulating layer 26 exposes the Connection pad 29.

As shown in FIG. 16, the second insulating layer 26 is etched to form a plurality of second via holes 27 respectively exposing each of the second sensing electrodes 231. The manner of etching the second insulating layer 26 may use a suitable etching means known in the art, which is not limited herein. In this embodiment, the second insulating layer 26 is a transparent photoresist material. Ultraviolet light (UV) can directly irradiate the area of the second insulating layer 26 corresponding to the formation of the second via hole 27, and then develop to form a second via hole. Holes 27, and the second insulating layer 26 is cured.

As shown in FIG. 17, a first material layer 25 having a conductive ability is formed, and the first material layer 25 covers a side of the touch panel 200 covered with a second insulating layer 26 and passes through the second via hole 27. A portion of the second sensing electrode 231 exposed by the second via hole 27 is covered. The first material layer 25 also covers the connection pad 29.

As shown in FIGS. 18 and 19, a third photoresist layer 207 is formed, and a portion of the third photoresist layer 207 is removed to form a third photoresist pattern 2071. The third photoresist pattern covers a portion of the first material layer 25 that connects two adjacent second sensing electrodes 231. In addition, the third photoresist pattern 2071 also covers the connection pad 29 (not shown).

As shown in FIG. 20, the portion of the first material layer 25 that is not covered by the third photoresist pattern 2071 loses the conductive ability, and a non-conductive portion 253 is formed. Specifically, a portion of the first material layer 25 that is not covered by the third photoresist pattern 2071 may be deactivated by the inactivating solution.

As shown in FIG. 21, the third photoresist pattern 3071 is removed, and a portion of the first material layer 25 that has not lost its conductive ability forms a second bridge portion 251.

At this time, a first sensing electrode 221, a second sensing electrode 231, a first bridge portion 24, a second bridge portion 251, a trace 28, and a connection pad 29 are formed on the substrate 21. The first sensing electrode 221, the second sensing electrode 231 and the first bridge portion 24 include a conductive layer 203. The second bridging portion 251 includes a portion of the first material layer 25 having a conductive ability. The trace 28 includes a conductive layer 203 and a metal layer 204. In addition to the conductive pad 203 and the metal layer 204, the connection pad 29 may further include a portion of the first material layer 25 having a conductive ability.

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 preferred implementations, those skilled in the art should understand that the technical solution of the present invention may be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

100, 200, 300‧‧‧ touch panel

11, 21‧‧‧ substrate

12‧‧‧ conductive element

13, 24, 34‧‧‧‧First bridge

14,251,351‧‧‧Second bridge section

15‧‧‧first insulating layer

16‧‧‧ first via

201‧‧‧ Chuo

202‧‧‧Peripheral area

22, 32‧‧‧First sensing electrode series

221‧‧‧first sensing electrode

23, 33‧‧‧Second sensing electrode series

231, 331‧‧‧Second sensing electrode

25, 35‧‧‧ first material layer

253, 353‧‧‧ non-conductive parts

26‧‧‧Second insulation layer

27‧‧‧Second Via

28‧‧‧ route

281‧‧‧Sublayer

29‧‧‧Connecting pad

203, 303‧‧‧ conductive layer

204‧‧‧metal layer

205‧‧‧First photoresist layer

2051‧‧‧The first photoresist pattern

206‧‧‧Second photoresist layer

2061‧‧‧Second photoresist pattern

207‧‧‧Third photoresist layer

2071‧‧‧Third photoresist pattern

36‧‧‧Third insulation layer

361‧‧‧ island insulation

FIG. 1 is a schematic cross-sectional view of a conventional capacitive touch panel.

FIG. 2 is a schematic plan view of a touch panel according to a first embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view taken along the line III-III in FIG. 2.

FIG. 4 is an enlarged view of a part IV in FIG. 2.

Fig. 5 is a schematic sectional view taken along the line V-V in Fig. 4.

FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 4.

FIG. 7 is a schematic cross-sectional view of a touch panel according to a second embodiment of the present invention.

8 to 21 are manufacturing flowcharts of the touch panel according to the first embodiment of the present invention.

Claims (11)

A touch panel includes a substrate and a plurality of first sensing electrode strings extending along a first direction and a plurality of second sensing electrode strings extending along a second direction formed on the substrate. The test electrode series is electrically isolated from the second sensing electrode series. Each first sensing electrode series includes a plurality of first sensing electrodes connected in sequence, and each second sensing electrode series includes a serial connection. A plurality of second sensing electrodes; two adjacent first sensing electrodes in each first sensing electrode string are connected by a first bridge portion; an improvement thereof is that the touch panel further includes at least a cover An insulation layer of the first bridge portion, and a plurality of conductive second bridge portions formed on a side of the insulation layer away from the substrate, and a non-conductive portion connected to and surrounding the plurality of second bridge portions; Two adjacent second sensing electrodes in the two sensing electrode series are electrically connected through a second bridge portion; the plurality of second bridge portions and the non-conductive portion are formed of a same material layer. The touch panel according to claim 1, wherein the insulating layer further covers the first sensing electrode and the second sensing electrode, and the insulating layer is provided with at least one pass corresponding to each second sensing electrode. Holes, each second bridge portion is electrically connected to two adjacent second sensing electrodes through the at least one via hole, and the non-conductive portion covers an area of the insulation layer not covered by the second bridge portion. The touch panel according to claim 1, wherein the insulation layer includes a plurality of island-shaped insulation portions, and each island-shaped insulation portion covers a corresponding first bridge portion, and each second bridge portion is disposed in a corresponding Two second sensing electrodes on the island-shaped insulating portion and electrically connected to both sides of the island-shaped insulating portion, and an area of the touch panel not covered by the second bridge portion is basically The non-conductive portion is covered. The touch panel according to claim 1, wherein the first sensing electrode, the second sensing electrode, and the first bridge portion are disposed in a same layer and formed of a same light-transmitting conductive layer. The touch panel according to claim 1, wherein the material layer is a polymer material having a conductive ability, and at least a part of the material layer is processed to form a non-conductive portion having no conductive ability. The touch panel according to claim 1, wherein the touch panel defines a central area and a peripheral area surrounding the central area, the first sensing electrode string, the second sensing electrode string, The first bridging portion and the second bridging portion are both disposed in the central region; the peripheral region includes a trace for connecting each first sensing electrode string and each second sensing electrode string separately, and A connection pad located on the other end of the trace. The touch panel according to claim 6, wherein the wiring comprises a light-transmitting conductive layer and a metal layer that are sequentially stacked. The touch panel according to claim 6, wherein the connection pad includes a light-transmitting conductive layer, a metal layer, and a portion of the material layer having a conductive capability that are sequentially stacked. A method for manufacturing a touch panel includes: providing a substrate on which a conductive layer is formed; and patterning the conductive layer so that the conductive layer forms a plurality of first sensing electrodes, a plurality of second sensing electrodes, and a connection phase. A plurality of first bridging portions of two adjacent first sensing electrodes; forming an insulating layer, the insulating layer covering at least the plurality of first bridging portions; forming a material layer having a conductive ability, the material layer covering the The touch panel is formed with one side of an insulating layer; a portion of the material layer loses the conductive ability to form a non-conductive portion, and a portion of the material layer that does not lose the conductive ability forms a plurality of second bridge portions, each of which The part connects two adjacent second sensing electrodes. The method of manufacturing a touch panel according to claim 9, wherein the method of manufacturing the touch panel further comprises: the insulating layer further covering the first sensing electrode and the second sensing electrode, and the insulating The layer forms at least one via hole corresponding to each second sensing electrode, each second bridge portion is electrically connected to an adjacent second sensing electrode through the via hole, and the non-conductive portion covers the insulation layer and is not The area covered by the second bridge. The method for manufacturing a touch panel according to claim 9, wherein the insulating layer includes a plurality of island-shaped insulating portions, each island-shaped insulating portion covers a first bridge portion, and each second bridge portion is in the Two sides of the island-shaped insulating portion are electrically connected to two adjacent second sensing electrodes, and an area of the touch panel not covered by the second bridge portion is substantially covered by the non-conductive portion.