TW201528098A - Capacitive touch panel and manufacturing method thereof - Google Patents

Abstract

A touch panel and a manufacturing method thereof are provided. The touch panel includes a substrate, a sensing-electrode layer and at least a metallic-patterned component disposed thereon. The electrode-sensing layer includes at least a first electrode axis arranged along a first axis, at least a second electrode axis arranged along a second axis, and an isolation layer. The second electrode axis includes a plurality of conductive units and conductive traces. The conductive units are arranged on two sides of the first electrode axis. The conductive traces electrically connect adjacent conductive units. The isolation layer is disposed between the conductive traces and the first electrode axis. The metallic-patterned component is electrically in contact with the respective conductive trace. The resistance of the metallic-patterned component is greater than the resistance of the conductive trace. The present disclosure strengthens the conductivity of the conductive trace by the placement of the metallic-patterned component.

Description

Touch panel and manufacturing method thereof

The invention relates to a touch technology, and in particular to a touch panel and a manufacturing method thereof.

In recent years, with the development of touch panel technology, touch panels have been widely used in various electronic devices, such as mobile phones, laptop computers, and palmtop computers. The touch panel is generally integrated with the display panel as a touch display screen to serve as an input/output interface of the electronic device to achieve a touch display function. Accordingly, the user can touch the touch display screen through a finger or a touch sensing object (such as a stylus) to control the electronic device, corresponding to the function of the electronic device. The touch input methods of the conventional touch panel include resistive, capacitive, optical, electromagnetic induction and sound wave induction, wherein the capacitive type is a touch panel technology commonly used in the market.

The touch sensing circuit of the current touch panel is generally fabricated by a single layer of indium tin oxide (SITO) technology. Specifically, the X-axis sensing electrode and the Y-axis conductive unit in the touch sensing circuit are fabricated on a substrate and passed through another transparent conductive layer (eg, indium tin oxide (ITO)). To make a bridge connecting the Y-axis, the trace is electrically connected to the Y-axis conductive unit to form a Y-axis sensing electrode. At the same time, the overlapping area between the trace and the X-axis sensing electrode is electrically insulated from the Y-axis sensing electrode by disposing an insulating layer.

However, it is known that the thickness of indium tin oxide is relatively thin, the material is relatively fragile, and it is easy to crack in the process, for example, due to a change in etching temperature in the process, heat expansion and contraction or breakage due to electrostatic breakdown, thereby increasing oxidation. The resistance value of the indium tin line reduces the benefit of sensing signal transmission. In severe cases, an open circuit may occur, resulting in the touch panel not being made. The movement, especially the Y-axis trace on the insulating layer, is more susceptible to local breakage or open-circuit due to its thinner wiring and need to be spanned over the insulating layer.

In view of the above, the embodiments of the present invention provide a touch panel and a method for fabricating the same, which enhances a trace that is originally disposed on the insulating layer by adding a metal pattern portion to reduce traces in the sensing electrode layer of the touch panel. It is easy to break due to environmental or external factors.

Embodiments of the present invention provide a touch panel including a sensing electrode layer and at least one metal pattern portion. The sensing electrode layer includes at least one first electrode axis, at least one second electrode axis, and an insulating layer. The first electrode shaft extends along a first axial direction, and the second electrode shaft extends along a second axial direction. The second electrode axis is insulatively staggered with the first electrode axis. The second electrode shaft includes a plurality of conductive units and a plurality of traces, wherein the conductive units are spaced apart from each other on both sides of the first electrode axis. The trace is disposed on the first electrode shaft and electrically connected to the two axially adjacent two conductive units. The insulating layer is correspondingly disposed between the trace and the first electrode axis. The metal pattern portion is formed on the sensing electrode layer corresponding to the electrical contact with the trace, wherein a resistance value of the metal pattern portion is greater than a trace of the trace corresponding to the metal pattern portion. resistance.

In one embodiment of the invention, the metal pattern portion is further electrically in contact with the two axially adjacent two of the conductive units.

In one embodiment of the invention, the metal pattern portion is elongated.

In one embodiment of the present invention, wherein the length of the metal pattern portion is greater than the length of the trace, and the width of the metal pattern portion is smaller than the width of the trace.

In one embodiment of the invention, wherein the metal pattern portion includes a plurality of spaced apart bridging segments.

In one embodiment of the invention, the metal pattern portion includes a plurality of bridge wires, and the bridge wires electrically connect the two adjacent bridge segments.

In one embodiment of the present invention, the first electrode shaft includes a plurality of first conductive portions and a plurality of second conductive portions, wherein the second conductive portions are electrically connected to the first axially adjacent ones Two of the first conductive portions.

In one embodiment of the invention, wherein the second conductive portion is interleaved with the traces and the electrical contact is insulated by the insulating layer.

In one embodiment of the present invention, a plurality of peripheral leads are further included, and the peripheral leads are electrically connected to the first electrode axis and the second electrode axis.

In one embodiment of the present invention, a passivation layer is further included, and the passivation layer is formed on the metal pattern portion and at least a portion of the sensing electrode layer.

In one embodiment of the present invention, the material of the first electrode axis and the second electrode axis is indium tin oxide, indium zinc oxide, aluminum zinc oxide, nano silver, graphene and rice One of the carbon tubes.

In one embodiment of the invention, the material of the metal pattern portion is one or a combination of a copper alloy, an aluminum alloy, gold, silver, aluminum, copper, and molybdenum.

The embodiment of the invention provides a method for manufacturing a touch panel, which comprises the following steps. First, a sensing electrode layer is formed, wherein the sensing electrode layer comprises a first electrode axis extending along at least a first axial direction, at least one second electrode axis extending along a second axis, and an insulating layer. The second electrode shaft and the first electrode shaft are insulated and staggered. The second electrode shaft includes a plurality of conductive units and a plurality of traces, wherein the conductive units are spaced apart from each other on both sides of the first electrode axis. The trace is formed on the first electrode shaft and electrically connected to the two axially adjacent two conductive units, and the insulating layer is formed on the trace and the first electrode Between the axes. Forming, according to the position of the trace, at least one metal pattern portion on the sensing electrode layer to electrically contact the trace, wherein a resistance value of the metal pattern portion is greater than the metal pattern portion Corresponding to the resistance value of the trace of the electrical contact.

In summary, the touch panel and the method of manufacturing the same according to the embodiments of the present invention, the touch panel strengthens and ensures the electrode axis in the sensing electrode layer by adding a metal pattern portion above the sensing electrode layer. Continuity, thereby reducing the sensing electrode layer due to the ring A situation in which an open circuit is caused by an external or external force factor. Accordingly, the process yield of the touch panel is effectively improved.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

10, 10'‧‧‧ touch panel

11, 11'‧‧‧ substrate

12, 12'‧‧‧ sensing electrode layer

121‧‧‧First electrode shaft

1211‧‧‧First Conductive Department

1213‧‧‧Second Conductive Department

123‧‧‧Second electrode shaft

1231‧‧‧Conducting unit

1233‧‧‧Wiring

125‧‧‧Insulation

13, 13a, 13b, 13c‧‧‧ metal pattern department

131‧‧‧Bridge section

132‧‧‧Bridge wiring

15‧‧‧ peripheral leads

S100~S140‧‧‧Step process

S200~S204‧‧‧Step process

S300~S304‧‧‧Step process

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

Fig. 2 is a cross-sectional structural view taken along line A-A of Fig. 1.

3A-3C are partial front elevation views of a touch panel according to another embodiment of the present invention.

4 is a schematic top plan view of a touch panel according to a second embodiment of the present invention.

Figure 5 is a cross-sectional structural view taken along line B-B of Figure 4;

FIG. 6 is a schematic flow chart of a method for fabricating a touch panel according to an embodiment of the invention.

FIG. 7 is a schematic flow chart of a method for fabricating a sensing electrode layer according to an embodiment of the invention.

FIG. 8 is a schematic flow chart of a method for fabricating a sensing electrode layer according to another embodiment of the present invention.

In the following, the invention will be described in detail by way of illustration of various exemplary embodiments of the invention. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. In addition, the same reference numerals may be used in the drawings to indicate similar elements.

The present invention provides a touch panel having a circuit for enhancing the electrical conductivity of a sensing electrode layer. The touch panel can assist in reinforcing the conductivity of a trace across the insulating layer in the sensing electrode layer by adding a metal pattern portion. It is avoided that the electrode shaft spanning the insulating layer loses its function due to environmental or external force problems such as heat expansion and contraction and electrostatic breakdown during the process. In addition, what is described here is the actual design of the sensing electrode layer on the touch panel. The architecture and operation mode are not part of the present invention, and those skilled in the art should be familiar with the actual design architecture and operation principle of the sensing electrode layer, and therefore will be simply described in the following embodiments.

[First Embodiment]

Please refer to FIG. 1 and refer to FIG. 2 at the same time. FIG. 1 is a schematic top plan view of a touch panel according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional structural view taken along line A-A of FIG. In the embodiment, the touch panel 10 can be applied to an electronic device having a display device, such as a smart phone, a personal digital assistant, a tablet computer, a laptop computer, and the like.

The touch panel 10 includes a sensing electrode layer 12 and a metal pattern portion 13 . The sensing electrode layer 12 of the present embodiment is implemented in a so-called positive process structure in a process sequence, and includes a first electrode axis 121, a second electrode axis 123, and an insulating layer 125.

The first electrode shaft 121 extends in a first axial direction (for example, an X-axis direction). The second electrode shaft 123 extends in the second axial direction (for example, the Y-axis direction) and is insulated from the first electrode shaft 121. The first electrode shaft 121 and the second electrode shaft 123 of the present embodiment are all designed in multiple pieces. All of the first electrode shafts 121 are parallel to each other and have no electrical contact, and all of the second electrode shafts 123 are also parallel to each other and have no electrical contact. The second electrode shaft 123 further includes a conductive unit 1231 and a trace 1233. The conductive units 1231 are spaced apart from each other on both sides of the first electrode axis 121, and all of the conductive units 1231 are arranged in a matrix. The trace 1233 is insulatively disposed on the first electrode shaft 121 and electrically connected to the two adjacent conductive units 1231 in the second axial direction. The insulating layer 125 is correspondingly disposed between each of the traces 1233 and the first electrode axis 121, and the position where the first electrode axis 121 and the second electrode axis 123 are staggered with each other is insulated from direct electrical contact by the insulating layer 125.

More specifically, each of the first electrode shafts 121 includes a plurality of spaced-apart first conductive portions 1211 and a plurality of second conductive portions 1213 arranged in parallel, wherein the second conductive portions 1213 are electrically connected to the first axially adjacent portions. Two first conductive portions 1211. Further, the conductive unit 1231 of the second electrode shaft 123 is spaced apart from the first electrode Both sides of the second conductive portion 1213 of the shaft 121. The trace 1233 of the second electrode shaft 123 and the second conductive portion 1213 of the first electrode shaft 121 are alternately overlapped with each other, and are insulated from the direct electrical contact by the insulating layer 125. In addition, as shown in FIG. 2, since the trace 1233 of the second electrode axis 123 is electrically connected to the second conductive unit 1231 adjacent to the second axial direction across the second conductive portion 1213 and the insulating layer 125, the sensing electrode is The structure of layer 12 is constructed to form a bridge structure. It should be noted that, in this embodiment, the sensing electrode layer 12 includes a plurality of first electrode axes 121 and a plurality of second electrode axes 123. However, in other embodiments of the present invention, the sensing electrode layer may only include A first electrode shaft and a second electrode shaft.

The metal pattern portion 13 corresponds to the electrical contact trace 1233 and is formed on the sensing electrode layer 12. The metal pattern portion 13 of the present embodiment corresponds to the electrical contact traces 1233 in a one-to-one manner, and the resistance value of each of the metal pattern portions 13 is greater than the trace 1233 of the metal pattern portion 13 in electrical contact with the trace pattern 1233. resistance. In this way, when the sensing electrode layer 12 is cracked in the trace 1233, the signal transmission is performed via the corresponding metal pattern portion 13, and when the trace 1233 is not broken, it is still passed. Line 1233 is used for signal transmission.

Therefore, the touch panel 10 of the present embodiment ensures the continuity of the second electrode shaft 123 by adding the metal pattern portion 13 to the sensing electrode layer 12, thereby preventing the trace 1233 of the second electrode shaft 123 from being easily bridged by the bridge structure. The breakage of the touch panel 10 during the manufacturing process increases the resistance value of the second electrode shaft 123, and even opens the circuit, thereby improving the yield of the touch panel 10. In addition, the metal pattern portion 13 of the embodiment further electrically contacts the two conductive units 1231 adjacent to the second axial direction. In other words, the metal pattern portion 13 is further disposed to span the entire trace 1233, so that the metal pattern portion 13 can provide a more complete reinforcing effect to the trace 1233.

In addition, the touch panel 10 of the present embodiment further includes a substrate 11 , and the foregoing sensing electrode layer 12 is formed on a surface of the substrate 11 . The substrate 11 can be, for example, a transparent glass substrate or a plastic substrate. In an embodiment, the substrate 11 can be, for example, a reinforced substrate 11 in addition to being used as a substrate for carrying the sensing electrode layer 12, It can be used as a protective cover of the touch panel 10, in other words, the opposite surface of the substrate 11 on the surface on which the sensing electrode layer 12 is disposed is for the user to touch the input.

Furthermore, as shown in FIG. 1 , the area formed by the sensing electrode layer 12 can be defined as a sensing area (not shown), and the area outside the sensing area is a surrounding area (not shown). The touch panel 10 of the embodiment further includes a peripheral lead 15 disposed in the peripheral region for electrically connecting the first electrode shaft 121 and the second electrode shaft 123. The peripheral lead 15 is further connected to a back end detecting circuit, such as a touch detecting chip (not shown). Accordingly, the peripheral lead 15 transmits a signal between the touch detection chip and the first electrode axis 121 and the second electrode axis 123, so that the back end detection circuit can determine the exact position of the touch point on the touch panel 10.

As shown in FIG. 2, the touch panel 10 of the present embodiment further includes a passivation layer (not shown) formed on the metal pattern portion 13 and at least a portion of the sensing electrode layer 12, and the passivation layer is used as a dielectric layer. The sensing electrode layer 12 and the metal pattern portion 13 are prevented from being damaged by chemical action or physical action. In addition, the surface of the passivation layer away from the sensing electrode layer 12 and the metal pattern portion 13 may be adhered to a display panel (not shown) through an adhesive layer (not shown), wherein the adhesive layer may be an optical adhesive. (Optical Clear Adhesive, OCA) to achieve.

In another embodiment, a protective layer (not shown) and another passivation layer are sequentially formed on a surface of the substrate 11 of the touch panel 10 on which the surface of the sensing electrode layer 12 is carried. ). The protective layer can be used to prevent electromagnetic interference, and the other passivation layer is used to protect the substrate 11 from damage due to excessive external force.

The structure of the metal pattern portion 13 will be further described below.

First, as shown in Fig. 1, the metal pattern portion 13 of the present embodiment has a long strip design. In addition, the present embodiment further designs that the width of the metal pattern portion 13 (the length in the first axial direction) is smaller than the width of the trace 1233, and the length of the metal pattern portion 13 (the length in the second axial direction) is greater than or equal to the trace 1233. length.

It is conventional that the resistance of a wire made of metal is inversely proportional to the width of the wire and proportional to the length of the wire. Therefore, the present embodiment can be omitted in the elongated metal pattern portion 13. Within the visible range, the resistance value of the metal pattern portion 13 is made larger than the resistance value of the corresponding conductive contact trace 1233 by reducing the width of the metal pattern portion 13 or increasing the length of the metal pattern portion 13. In addition, those skilled in the art can adjust the required resistance value by designing the pattern of the metal pattern portion 13 according to the line resistance requirement of the touch detection chip.

In other embodiments, a partial front view of a touch panel according to another embodiment of the present invention is shown in FIG. 3A to FIG. 3C. As shown in FIG. 3A, the metal pattern portion 13a of the present embodiment includes a plurality of bridging segments 131. Wherein, the bridging segments 131 are arranged in a line along the second axial direction and are spaced apart from each other without being connected. The electrical connection is achieved by the wires 1233 that are electrically contacted between the respective bridge segments 131. In addition, since the metal pattern portion 13a of the present embodiment is of a segment design, the total resistance value of all the bridge segments 131 is greater than the resistance value of the trace 1233 corresponding to the electrical contact.

As shown in FIG. 3B, the metal pattern portion 13b of the present embodiment includes a plurality of bridge wires 132 in addition to the segmented bridge segments 131 as designed in FIG. 3A. The bridge wire 132 is electrically connected to the adjacent two bridge segments 131 for the purpose of electrically connecting the respective bridge segments 131 directly through the bridge wire 132.

As shown in FIG. 3C, the metal pattern portion 13c of the present embodiment is substantially the same as the segmented bridge portion 131 designed in FIG. 3A, except that the bridging segments 131 of the metal pattern portion 13c of the present embodiment are arranged in a non-linear arrangement. .

Furthermore, the metal pattern portion 13 can be realized in other embodiments, such as a square shape, a circular shape, a diamond shape, a triangular shape, or a hexagonal shape, in addition to the above-described elongated and segmented shape. The shape or the octagon or the like is realized, and is not limited by the above embodiment. The actual structure and arrangement of the metal pattern portion 13 can be set according to the resistance value requirement and the process capability, as long as the auxiliary conductive unit 1231 can be electrically connected, and the resistance value of each metal pattern portion 13 is greater than the corresponding power. The resistance value of the trace 1233 of the sexual contact can be.

It is worth mentioning that the first electrode shaft 121 and the second electrode shaft 123 can be respectively The conductive material layer is formed by a photolithography process such as exposure, development, and etching. The material of the conductive material layer may be transparent conductive such as indium tin oxide (ITO), indium zinc oxide, aluminum zinc oxide, nano silver or the like, graphene or carbon nanotube. material. In addition, the first conductive portion 1211 of the first electrode shaft 121 and the conductive unit 1231 of the second electrode shaft 123 may be polygonal blocks according to actual circuit design requirements, such as a square, a rectangle, a diamond, a triangle, a hexagon, or an octagon. The embodiment is not limited to this embodiment.

The material of the metal pattern portion 13 may include a conductive metal or a conductive alloy such as a copper alloy, an aluminum alloy, gold, silver, aluminum, copper, molybdenum, etc., and may be by sputtering, printing, photolithography, physical vapor deposition (PVD) or It is formed by chemical vapor deposition (CVD). The material of the peripheral lead 15 may be formed of the same material as the first electrode shaft 121 (second electrode shaft 123) or the metal pattern portion 13 and by the same process. The material of the passivation layer includes tantalum nitride, hafnium oxide, benzocyclobutene, a polyester film or an acrylic resin, and the like, and can be formed by chemical vapor deposition. In addition, the protective layer may be realized by indium tin oxide.

[Second embodiment]

Please refer to FIG. 4 and refer to FIG. 5 at the same time. 4 is a schematic top plan view of a touch panel according to a second embodiment of the present invention. Figure 5 is a cross-sectional structural view taken along line B-B of Figure 4; The touch panel 10 ′ of the present embodiment is substantially the same as the touch panel 10 of the first embodiment in terms of components, materials, and applications, and the difference lies in the sensing electrodes of the touch panel 10 ′ of the present embodiment. Layer 12' is implemented in a process sequence in a so-called counter process configuration.

As shown in Figs. 4 and 5, the sensing electrode layer 12' of the present embodiment is disposed on the substrate 11'. Further, the sensing electrode layer 12' is formed in the order in which the second conductive portion 1213 of the first electrode shaft 121 is formed first, and then the insulating layer 125 is formed on the second conductive portion 1213. Next, the first conductive portion 1211 of the first electrode shaft 121 and the conductive unit 1231 of the second electrode shaft 123 and the trace 1233 are formed at one time. In this way, the first conductive portion 1211 forms an array spaced apart on both sides of the trace 1233. And the electrical connection is achieved in the first axial direction by the second conductive portion 1213 originally formed. On the other hand, the conductive unit 1231 and the trace 1233 of the second electrode shaft 123 are integrally formed to extend along the second axial direction, and the conductive units 1231 of the second electrode shaft 123 are oppositely arranged at intervals of the second conductive portion 1213. Side architecture.

The metal pattern portion 13 corresponds to the electrical contact trace 1233 and is formed on the sensing electrode layer 12', thereby ensuring the continuity of the second electrode shaft 123, and avoiding the trace 1233 of the second electrode shaft 123 from being easily applied to the touch panel 10'. The occurrence of breakage during the manufacturing process increases the resistance value of the second electrode shaft 123, and even the occurrence of an open circuit, thereby improving the yield of the touch panel 10'.

[Third embodiment]

FIG. 6 is a schematic flow chart of a method for fabricating a touch panel according to an embodiment of the invention. The steps of the method for manufacturing the touch panel of this embodiment include: In step S100, a substrate is provided, wherein the substrate can be a transparent glass substrate or a plastic substrate.

Step S110, forming a sensing electrode layer on a surface of the substrate. Wherein, the sensing electrode layer comprises a first electrode axis extending along the first axial direction, a second electrode axis extending along the second axial direction, and an insulating layer. The second electrode shaft and the first electrode shaft are insulated and staggered, and the second electrode shaft comprises a plurality of conductive units and a plurality of traces, wherein the conductive units are arranged on both sides of the first electrode shaft, and the traces are formed on the first An electrode shaft is electrically connected to the two axially adjacent two conductive units. The insulating layer is formed between the trace and the first electrode axis.

Step S120, forming a metal pattern portion on the sensing electrode layer according to the position of the foregoing trace to electrically contact the trace. The resistance value of the metal pattern portion is greater than the resistance value of the trace that is in electrical contact with the metal pattern portion. In addition, in another embodiment, the metal pattern portion further electrically contacts the two axially adjacent two conductive units in addition to the electrical contact with the trace.

In step S130, a peripheral lead is formed to electrically connect the first electrode shaft and the second electrode shaft. Wherein, in order to reduce the manufacturing process, in another embodiment, if the peripheral leads are If the design is the same as that of the first electrode axis and the second electrode axis, the step S130 can be integrated into the step S110 to be formed by the same process step; and if the peripheral lead is designed with the same material as the metal pattern portion, The step S130 can be integrated into the step S120 to be formed by the same process step.

Step S140, forming a passivation layer on the metal pattern portion and at least a portion of the sensing electrode layer as a dielectric layer to prevent the metal pattern portion, the first electrode axis and the second electrode axis from being damaged by chemical or physical effects. .

In other embodiments, the protective layer and another passivation layer may be sequentially formed by sputtering or chemical vapor deposition on the opposite surface of the surface of the substrate on which the sensing electrode layer is formed to prevent electromagnetic interference and protection, respectively. The substrate is not damaged by excessive external force.

Next, a specific implementation step of forming the sensing electrode layer in step S110 in the method for fabricating the touch panel described above will be described in more detail.

Please refer to FIG. 7 in conjunction with the architecture of the touch panel 10 described with reference to the first embodiment (ie, FIGS. 1 and 2). FIG. 7 is a schematic flow chart of a method for fabricating a sensing electrode layer according to an embodiment of the invention. As shown in FIG. 7, the manufacturing method of the sensing electrode layer 12 includes: patterning a first conductive material layer to form a first conductive portion 1211, a second conductive portion 1213, and a conductive unit 1231 (step S200), wherein the conductive unit 1231 is spaced apart from both sides of the second conductive portion 1213. Furthermore, a dielectric material layer is patterned according to the position of the second conductive portion 1213 to correspondingly form the insulating layer 125 on the second conductive portion 1213 (step S202). Then, a second conductive material layer is patterned according to the positions of the conductive unit 1231 and the insulating layer 125 to form the traces 1233 on the insulating layer 125 (step S204), so that the traces 1233 are electrically connected to the second axis. Two adjacent conductive units 1231. Thereby, each of the traces 1233 and the second conductive portions 1213 are alternately overlapped and electrically insulated by the insulating layer 125.

Please refer to FIG. 8 in conjunction with the architecture of the touch panel 10' described with reference to the second embodiment (ie, FIGS. 4 and 5). FIG. 8 is a schematic flow chart of a method for fabricating a sensing electrode layer according to another embodiment of the present invention. As shown in FIG. 8, the manufacturing method of the sensing electrode layer 12' includes: patterning a first conductive material layer to form a plurality of traces 1233 (steps) S300). Furthermore, a dielectric material layer is patterned according to the position of the trace 1233 to form the insulating layer 125 on the trace 1233 (step S302). Then, a second conductive material layer is patterned according to the position of the insulating layer 125 to form the first conductive portion 1211, the second conductive portion 1213, and the conductive unit 1231 (step S304), wherein the second conductive portion 1213 is correspondingly formed on the insulating layer. 125, and the conductive units 1231 are spaced apart from each other on both sides of the second conductive portion 1213. Thereby, each of the second conductive portions 1213 and the respective traces 1233 are alternately overlapped and electrically insulated by the insulating layer 125.

It should be noted that the method for patterning the material layer mentioned in the foregoing embodiment may be implemented by, for example, first spraying a material layer and then using a photolithography process including exposure, development, etching, etc., or directly This is achieved by a printing process, and is not limited thereto.

In summary, the touch panel and the method for fabricating the same according to the embodiments of the present invention provide a metal pattern portion over the sensing electrode layer to enhance the conductivity of the electrode axis in the sensing electrode layer. In order to reduce the circuit breaker of the sensing electrode layer due to environmental or external force factors, the process yield of the touch panel is effectively improved. In addition, when the electrode axis in the sensing electrode layer is broken, the added metal pattern portion can also exert the utility of the bypass circuit at this time, effectively avoiding a large increase in the resistance of the electrode shaft, and maintaining the sensing electrode layer. Operation.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

10‧‧‧Touch panel

11‧‧‧Substrate

121‧‧‧First electrode shaft

1211‧‧‧First Conductive Department

1213‧‧‧Second Conductive Department

123‧‧‧Second electrode shaft

1231‧‧‧Conducting unit

1233‧‧‧Wiring

125‧‧‧Insulation

13‧‧‧Metal Pattern Department

15‧‧‧ peripheral leads

Claims (19)

A touch panel includes: a sensing electrode layer comprising: at least one first electrode axis extending along a first axial direction; at least one second electrode axis extending along a second axis, the second electrode The shaft is insulatively staggered with the first electrode shaft, wherein the second electrode shaft includes a plurality of conductive units and a plurality of traces, and the conductive units are spacedly arranged on both sides of the first electrode shaft, a trace disposed on the first electrode axis and electrically connected to the two axially adjacent two of the conductive units; and an insulating layer correspondingly disposed on the trace and the first electrode axis And the at least one metal pattern portion is formed on the sensing electrode layer corresponding to the electrical contact with the trace, wherein a resistance value of the metal pattern portion is greater than a corresponding electrical contact with the metal pattern portion The resistance value of the trace. The touch panel of claim 1, wherein the metal pattern portion further electrically contacts the two axially adjacent two of the conductive units. The touch panel of claim 1, wherein the metal pattern portion is elongated. The touch panel of claim 3, wherein a length of the metal pattern portion is greater than a length of the trace, and a width of the metal pattern portion is smaller than a width of the trace. The touch panel of claim 1, wherein the metal pattern portion comprises a plurality of spaced apart bridge segments. The touch panel of claim 5, wherein the metal pattern portion comprises a plurality of bridge wires, and the bridge wires are electrically connected to two adjacent bridge segments. The touch panel of claim 1, wherein the first electrode shaft comprises a plurality of first conductive portions and a plurality of second conductive portions, wherein the second conductive portion is electrically connected to the first axis Two of the first conductive portions adjacent upward. The touch panel of claim 7, wherein the second conductive portion is interlaced with the trace, and the second conductive portion penetrates the insulating layer to insulate electrical contact. The touch panel of claim 1, further comprising a plurality of peripheral leads, wherein the peripheral leads are electrically connected to the first electrode axis and the second electrode axis. The touch panel of claim 1, further comprising a passivation layer formed on the metal pattern portion and at least a portion of the sensing electrode layer. The touch panel of claim 1, wherein the material of the first electrode axis and the second electrode axis is indium tin oxide, indium zinc oxide, aluminum zinc oxide, nano silver, graphite One of the olefin and the carbon nanotubes. The touch panel of claim 1, wherein the material of the metal pattern portion is one or a combination of a copper alloy, an aluminum alloy, gold, silver, aluminum, copper, and molybdenum. A method for fabricating a touch panel, comprising: forming a sensing electrode layer, wherein the sensing electrode layer comprises a first electrode axis extending along at least one first axial direction, and at least one extending along a second axial direction a second electrode shaft and an insulating layer, wherein the second electrode shaft and the first electrode shaft are insulated and staggered, and the second electrode shaft comprises a plurality of conductive units and a plurality of traces, wherein the conductive units are spaced apart On both sides of the first electrode shaft, the trace is formed on the first electrode shaft and electrically connected to the two axially adjacent two conductive units, and the insulating layer is formed Between the trace and the first electrode axis; and forming at least one metal pattern portion on the sensing electrode layer according to the position of the trace and correspondingly electrically contacting the trace, wherein The resistance value of the metal pattern portion is larger than the resistance value of the trace corresponding to the metal pattern portion. The method of manufacturing the touch panel of claim 13, wherein the first electrode shaft comprises a plurality of first conductive portions and a plurality of second conductive portions, wherein the second conductive portion is electrically connected to the Two first conductive portions adjacent in the first axial direction. The method of manufacturing the touch panel of claim 14, wherein the step of forming the sensing electrode layer comprises: patterning a first conductive material layer to form the first conductive portion, a second conductive portion and the conductive unit, wherein the conductive units are spaced apart from each other on both sides of the second conductive portion; a dielectric material layer is patterned to form the insulating layer on the second conductive portion; And patterning a second layer of conductive material to form the traces on the insulating layer. The method of manufacturing the touch panel of claim 14, wherein the step of forming the sensing electrode layer further comprises: patterning a first conductive material layer to form the trace; patterning a dielectric material Forming the insulating layer on the trace; and patterning a second conductive material layer to form the first conductive portion, the second conductive portion, and the conductive unit, wherein the second conductive portion Formed on the insulating layer, and the conductive units are spaced apart on both sides of the second conductive portion. The method of fabricating a touch panel according to claim 13, wherein the metal pattern portion further electrically contacts the two axially adjacent two of the conductive units. The method of manufacturing the touch panel of claim 13, further comprising: forming a peripheral lead electrically connecting the first electrode axis and the second electrode axis. The method of manufacturing the touch panel of claim 13, further comprising: forming a passivation layer on the metal pattern portion and at least a portion of the sensing electrode layer.