CN102819358A - Layout structure of capacitive touch panel and manufacturing method thereof - Google Patents

Abstract

A layout structure of a capacitive touch panel comprises a conductive layer, an insulating layer and a plurality of electric bridges. The conductive layer is disposed on a substrate and includes a plurality of first touch units and a plurality of second touch units. The first touch units are electrically connected with each other through a plurality of connecting sections to form a plurality of first touch serials extending along a first direction. The insulating layer is disposed on the conductive layer. Each bridge comprises a compensation part, a first bridging part and a second bridging part. The compensation parts are respectively arranged on the connecting sections. The first bridging portion and the second bridging portion are disposed on the insulating layer. The second touch units are electrically connected with each other through the first bridging portions and the second bridging portions to form a plurality of second touch series extending along a second direction.

Description

Layout structure and manufacturing method of capacitive touch panel

technical field

The present invention relates to a touch panel (touch panel), in particular to a layout structure of a capacitive touch panel (capacitive touch panel) and a manufacturing method thereof.

Background technique

With the development of touch panel technology, touch panels have been widely used in screens of electronic devices, such as mobile phones, notebook computers or tablet computers. The touch panel allows the user to perform input or operation actions more conveniently, making the user interface more humanized and convenient.

Generally speaking, the traditional touch panel realizes the touch function by disposing two touch series arranged in different directions on the input interface. However, as the size of the panel increases, the length of the touch series also increases, which will cause the problem of excessive impedance of the touch series, thereby reducing the touch sensitivity of the touch panel.

Contents of the invention

The present invention provides a layout structure and manufacturing method of a capacitive touch panel, which can reduce the impedance of the touch series to improve the touch sensitivity.

The invention proposes a layout structure of a capacitive touch panel, which includes a conductive layer, an insulating layer and a plurality of bridges. The conductive layer is configured on a substrate. The conductive layer includes a plurality of first touch units and a plurality of second touch units. The first touch units are electrically connected to each other through a plurality of connection sections to form a plurality of first touch series extending along a first direction. The insulating layer is configured on the conductive layer. Each electric bridge includes a compensating part, a first bridging part and a second bridging part. The compensation parts are respectively arranged on the connection section, and the first jumper part and the second jumper part are arranged on the insulating layer. The second touch units are electrically connected to each other through the first jumper portion and the second jumper portion to form a plurality of second touch series extending along a second direction.

In an embodiment of the present invention, the above-mentioned insulating layer includes a plurality of first insulating patterns and a plurality of second insulating patterns, and the first bridging portions and the second bridging portions are respectively arranged on the first insulating patterns and the second insulating patterns. on the insulation pattern.

In an embodiment of the present invention, the above-mentioned first insulating pattern and the second insulating pattern are respectively disposed on two sides of the connection section, and are substantially perpendicular to the connection section.

In an embodiment of the present invention, the compensation portion is located between the first bridging portion and the second bridging portion, and is substantially perpendicular to the first bridging portion and the second bridging portion.

In an embodiment of the present invention, the geometric shape of the above-mentioned first bridging portion is the same as the geometric shape of the second bridging portion.

In an embodiment of the present invention, the widths of the compensation portion, the first bridging portion and the second bridging portion are all less than or equal to 100 microns.

In addition, the present invention also proposes a method for manufacturing a capacitive touch panel, which includes the following steps. First, a substrate is provided. Next, a conductive layer is disposed on the substrate, wherein the conductive layer includes a plurality of first touch units and a plurality of second touch units, and the first touch units are electrically connected to each other through a plurality of connection segments to form a A plurality of first touch series extending along a first direction. Next, an insulating layer is disposed on the conductive layer. Next, a plurality of electric bridges are arranged on the conductive layer. Each electric bridge includes a compensating part, a first bridging part and a second bridging part. The compensation parts are respectively arranged on the connection section, and the first bridging part and the second bridging part are arranged on the insulating layer. The second touch units are electrically connected to each other through the first jumper portion and the second jumper portion to form a plurality of second touch series extending along a second direction.

Based on the above, in the embodiment of the present invention, since the compensation part of the electric bridge is arranged on the connection section between the first touch units, and the second touch unit connects the first bridging part of the electric bridge with the second touch unit The two jumper parts are electrically connected to each other, so the above-mentioned layout structure of the capacitive touch panel and its manufacturing method can reduce the impedance of the first touch series and the second touch series in the first direction and the second direction, Therefore, the touch sensitivity of the capacitive touch panel can be improved.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of the layout structure of a capacitive touch panel according to a first embodiment of the present invention.

2A to 2D are schematic top views of the manufacturing process of the layout structure of the capacitive touch panel shown in FIG. 1 .

FIG. 3 is a schematic diagram of a layout structure of a capacitive touch panel according to a second embodiment of the present invention.

4A to 4D are schematic top views of the manufacturing process of the layout structure of the capacitive touch panel shown in FIG. 3 .

Reference signs:

100, 200: capacitive touch panel

110, 210: Substrate

120, 220: conductive layer

122, 124, 222, 224: touch unit

122’, 124’, 222’, 224’: touch series

130, 230: insulating layer

132, 134, 232, 234: insulation patterns

140, 240: bridge

142, 242: Compensation Department

144, 146, 244, 246: bridge

150, 250: connecting segments

W ₁ ~ W ₆ : Width

Detailed ways

first embodiment

FIG. 1 is a schematic diagram of the layout structure of a capacitive touch panel according to a first embodiment of the present invention. Referring to FIG. 1 , the layout structure of the capacitive touch panel 100 includes a conductive layer 120 , an insulating layer 130 and a plurality of bridges 140 disposed on a substrate 110 . In this embodiment, the substrate 110 can be made of polycarbonate (Polycarbonate, PC), polyethylene (Polyethylene, PE), polyethylene terephthalate (polyethylene terephthalate, PET), polymethyl methacrylate ( PolyMethyl MethAcrylate, PMMA) or glass and other transparent materials.

In addition, the conductive layer 120 includes a plurality of touch units 122 and a plurality of touch units 124 . The touch units 122 are electrically connected to each other through a plurality of connection sections 150 to form a plurality of touch series 122' extending along a first direction (such as the X direction). In this embodiment, the conductive layer 120 is, for example, indium-tin oxide (ITO) or metal. The insulating layer 130 is disposed on the conductive layer 120 . In addition, each bridge 140 includes a compensation part 142 , a jumper part 144 and a jumper part 146 . The compensation parts 142 are respectively disposed on the connection sections 150 . The bridging portion 144 and the bridging portion 146 are disposed on the insulating layer 130, wherein the touch unit 124 is electrically connected to each other through the bridging portion 144 and the bridging portion 146 to form multiple The touch series 124'. As shown in FIG. 1 , the capacitive touch panel 100 of this embodiment is, for example, a 4×5 capacitive touch panel. That is, each touch series 122' includes four touch units 122, and each touch series 124' includes five touch units 124.

Besides, the compensating portion 142 of the bridge 140 is located between the bridging portion 144 and the bridging portion 146 , and is substantially perpendicular to the bridging portion 144 and the bridging portion 146 . In this embodiment, the geometric shape of the bridging portion 144 is the same as that of the bridging portion 146 , and is, for example, a rectangle. Since the metal itself is opaque, if the bridge 140 is made of metal, the widths of the compensating portion 142 , the bridging portion 144 and the bridging portion 146 must be limited to avoid being detected by human eyes. For example, in this embodiment, the width W ₁ of the compensation portion 142 , the width W ₂ of the bridging portion 144 , and the width W ₃ of the bridging portion 146 are all less than or equal to 100 μm.

In addition, since the bridging portions 144 and 146 are arranged above the touch unit 122, in order to avoid the short circuit between the bridging portions 144, 146 and the touch unit 122 below, the touch unit 122 and the touch unit 124 In this embodiment, the insulating layer 130 is disposed between the bridging portions 144 , 146 and the touch unit 122 . As shown in FIG. 1 , the insulating layer 130 includes a plurality of insulating patterns 132 and a plurality of insulating patterns 134 , and the bridging portions 144 and the bridging portions 146 are respectively disposed on the insulating patterns 132 and the insulating patterns 134 . From the above, it can be known that through the configuration of the bridge 140, a plurality of touch units 124 can be electrically connected to each other, and a plurality of touch series 124' extending along the Y direction can be formed. 130, so that the short circuit between the touch series 124' extending along the Y direction and the touch series 122' extending along the X direction can be avoided. In this way, the capacitive touch panel 100 of this embodiment can realize the position sensing function of X-Y coordinates. In addition, the insulating pattern 132 and the insulating pattern 134 are respectively disposed on two sides of the connection section 150 , and are substantially perpendicular to the connection section 150 . In this embodiment, the geometric shape of the insulating pattern 132 is, for example, the same as that of the insulating pattern 134 , and is, for example, a rectangle.

It is worth mentioning that since the compensation part 142 of the bridge 140 is disposed on the connection section 150 for electrically connecting the touch unit 122, the connection section 150 and the compensation part 142 can be regarded as two parallel resistors. Therefore, the resistance value of the touch series 122' in the X direction can be reduced. Therefore, the layout structure of the capacitive touch panel 100 can improve the touch sensitivity of the capacitive touch panel 100 in the X direction. In this embodiment, the connection section 150 is, for example, ITO, and the compensation portion 142 is, for example, ITO or metal. Furthermore, since the resistance value of metal is much smaller than the resistance value of ITO, when the connection section 150 is ITO and the compensation part 142 is metal, the resistance value of the connection section 150 is approximately equal to that of the compensation part 142 resistance value, which is much smaller than that of indium tin oxide.

On the other hand, since each bridge 140 includes two jumpers 144 and 146, compared to the structure with only one jumper, the impedance value of the touch series 124' in the Y direction will be the same as the aforementioned structure. one-half of. Therefore, the layout structure of the capacitive touch panel 100 can improve the touch sensitivity of the capacitive touch panel 100 in the Y direction.

2A to 2D are schematic top views of the fabrication process of the layout structure of the capacitive touch panel 100 in FIG. 1 . Referring to FIG. 2A , firstly, a substrate 110 , such as a glass substrate, is provided. Next, as shown in FIG. 2B , a conductive layer 120 is disposed on the substrate 110 , wherein the conductive layer 120 includes a plurality of touch units 122 and touch units 124 , and the touch units 122 are electrically connected to each other through a plurality of connection sections 150 , so as to form a plurality of touch series 122 extending along the first direction (for example, the X direction). In other words, in this embodiment, the touch unit 122 has been short-circuited in the X direction, wherein the touch unit 122 and the touch unit 124 are, for example, indium tin oxide.

Next, referring to FIG. 2C , an insulating layer 130 is disposed on the conductive layer 120 . The insulating layer 130 includes an insulating pattern 132 and an insulating pattern 134 , and the insulating patterns 132 and 134 extend along the Y direction.

Next, a plurality of bridges 140 are disposed on the conductive layer 120 . As shown in FIG. 2D , each bridge 140 includes a compensation portion 142 , a bridge portion 144 and a bridge portion 146 . The compensation parts 142 are respectively disposed on the connecting section 150, and the jumper part 144 and the jumper part 146 are disposed on the insulating layer 130, wherein the touch unit 124 is electrically connected to each other through the jumper part 144 and the jumper part 146, so as to A plurality of touch series 124' extending along the second direction (for example, the Y direction) is formed. So far, the layout structure of the capacitive touch panel 100 shown in FIG. 1 is completed. Wherein the bridge 140 is, for example, indium tin oxide or metal. Further, as shown in FIG. 2D , the electric bridge 140 between the two touch units 124 forms a similar "H"-shaped structure, wherein the bridging portions 144 and 146 are parallel to each other along the Y direction, and the compensating portion 142 is located at the bridging portion 144 , 146 , and the vertical bridges 144 , 146 . The compensation part 142 can reduce the impedance value of the touch series 122' in the X direction, and the two bridge parts 144 and 146 can reduce the resistance value of the touch series 124' in the Y direction. Since the detailed layout structure of the capacitive touch panel 100 can be obtained from the description corresponding to FIG. 1 for sufficient teaching, suggestion and implementation description, it is not repeated here. It should be noted that in the step of FIG. 2D , since the compensating portion 142 and the bridging portions 144 and 146 can be simultaneously fabricated using a single photomask, this embodiment provides a method for fabricating the capacitive touch panel 100 It has the advantages of simplifying the number of masks and reducing the complexity of the process.

second embodiment

FIG. 3 is a schematic diagram of a layout structure of a capacitive touch panel according to a second embodiment of the present invention. The layout structure of the capacitive touch panel 200 in FIG. 3 is similar to the layout structure of the capacitive touch panel 100 in FIG. 1 , but the main difference between them is that the touch series 222 ′ of this embodiment extends in the Y direction. , and the touch series 224' extends in the X direction. In other words, in this embodiment, the first direction is the Y direction, and the second direction is the X direction.

In detail, the capacitive touch panel 200 of this embodiment is a 5×4 capacitive touch panel. That is, each touch series 222 ′ includes four touch units 222 , and each touch series 224 ′ includes five touch units 224 . The touch units 222 are electrically connected to each other through a plurality of connection sections 250 to form a plurality of touch series 222 ′ extending along the Y direction. In addition, the touch units 224 are electrically connected to each other through the bridging portions 244 and 246 of the electric bridge 240 to form a plurality of touch series 224 ′ extending along the X direction. The bridging portions 244 and 246 are respectively disposed on the insulating patterns 232 and 234 . In this embodiment, the material of the bridge 240 is, for example, indium tin oxide or metal. When the material of the bridge 240 is metal, in order to prevent the human eye from detecting the bridge 240, the width W ₄ of the compensation portion 242, the width W ₅ of the bridge portion 244, and the width W ₆ of the bridge portion 246 are all less than or equal to 100, for example. Microns.

As shown in FIG. 3 , in this embodiment, the bridging portions 244 and 246 between the two touch units 224 extend along the X direction and are parallel to each other. In addition, the compensation portion 242 located between the bridging portions 244 and 246 is perpendicular to the bridging portions 244 and 246 . That is, the compensating part 242 of this embodiment extends along the Y direction. Similarly, the compensating part 242 can reduce the impedance value of the touch series 222' in the Y direction, and the structure of the two bridging parts 244 and 246 can reduce the resistance value of the touch series 224' in the X direction. Therefore, the layout structure of the capacitive touch panel 200 in this embodiment can improve the touch sensitivity of the capacitive touch panel 200 .

4A to 4D are schematic top views of the manufacturing process of the layout structure of the capacitive touch panel 200 in FIG. 3 . Referring to FIG. 4A , firstly, a substrate 210 , such as a glass substrate, is provided. Next, as shown in FIG. 4B , a conductive layer 220 is disposed on the substrate 210, wherein the conductive layer 220 includes a plurality of touch units 222 and a touch unit 224, and the touch units 222 are electrically connected to each other through a plurality of connection sections 250 , so as to form a plurality of touch series 222' extending along the first direction (eg, Y direction). In other words, in this embodiment, the touch unit 222 has been short-circuited in the Y direction, and the touch unit 222 and the touch unit 224 are, for example, indium tin oxide.

Next, referring to FIG. 4C , an insulating layer 230 is disposed on the conductive layer 220 . The insulating layer 230 includes an insulating pattern 232 and an insulating pattern 234 , and the insulating patterns 232 and 234 extend along the X direction.

Next, a plurality of bridges 240 are disposed on the conductive layer 220 . As shown in FIG. 4D , each bridge 240 includes a compensation portion 242 , a bridge portion 244 and a bridge portion 246 . The compensation parts 242 are respectively disposed on the connection section 250, and the jumper part 244 and the jumper part 246 are disposed on the insulating layer 230, wherein the touch unit 224 is electrically connected to each other through the jumper part 244 and the jumper part 246, so as to A plurality of touch series 224' extending along the second direction (for example, the X direction) is formed. So far, the layout structure of the capacitive touch panel 200 as shown in FIG. 3 is completed. Since the detailed layout structure of the capacitive touch panel 200 can be sufficiently taught, suggested and implemented from the description of the first embodiment, it is not repeated here.

To sum up, in the embodiment of the present invention, the impedance value of the touch series in the first direction and the second direction can be reduced by configuring the compensation part and the bridge structure of the two bridge parts on the touch unit. Therefore, the touch sensitivity of the capacitive touch panel can be improved. In addition, since the compensating portion and the bridging portion can be produced by the same process, the layout structures described in the above embodiments can simplify the number of masks and the complexity of the process, thereby reducing the manufacturing cost.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention, and any person of ordinary skill in the art may make some changes and modifications without departing from the spirit and scope of the present invention.

Claims (12)

1. A layout structure of a capacitive touch panel, comprising: A conductive layer, configured on a substrate, the conductive layer includes a plurality of first touch units and a plurality of second touch units, and the first touch units are electrically connected to each other through a plurality of connection sections to form a plurality of first touch series extending along a first direction; an insulating layer disposed on the conductive layer; and A plurality of electric bridges, each electric bridge includes a compensating portion, a first bridging portion and a second bridging portion, the compensating portions are respectively arranged on the connection sections, and the first bridging portions and the second jumpers are disposed on the insulating layer, wherein the second touch units are electrically connected to each other through the first jumpers and the second jumpers to form a plurality of The second touch series extending in the second direction. 2. The layout structure of the capacitive touch panel according to claim 1, wherein the insulating layer comprises a plurality of first insulating patterns and a plurality of second insulating patterns, and the first jumpers and the second jumpers The contact portions are respectively disposed on the first insulating patterns and the second insulating patterns. 3. The layout structure of the capacitive touch panel according to claim 2, wherein the first insulating patterns and the second insulating patterns are respectively arranged on both sides of the connecting sections, and are substantially perpendicular to the connecting sections segment. 4. The layout structure of the capacitive touch panel according to claim 1, wherein the compensation portion is located between the first bridging portion and the second bridging portion, and is substantially perpendicular to the first bridging portion and the second bridging portion the second bridge. 5 . The layout structure of the capacitive touch panel according to claim 1 , wherein the geometric shape of the first bridging portion is the same as that of the second bridging portion. 6 . The layout structure of the capacitive touch panel according to claim 1 , wherein widths of the compensation portion, the first bridging portion and the second bridging portion are all less than or equal to 100 microns. 7. A method for manufacturing a capacitive touch panel, comprising: providing a substrate; A conductive layer is disposed on the substrate, wherein the conductive layer includes a plurality of first touch units and a plurality of second touch units, and the first touch units are electrically connected to each other through a plurality of connection sections, so as to forming a plurality of first touch series extending along a first direction; disposing an insulating layer on the conductive layer; and A plurality of electric bridges are arranged on the conductive layer, each electric bridge includes a compensation part, a first bridging part and a second bridging part, the compensating parts are respectively arranged on the connecting sections, and the The first jumpers and the second jumpers are disposed on the insulating layer, wherein the second touch units are electrically connected to each other through the first jumpers and the second jumpers, to form a plurality of second touch series extending along a second direction. 8. The manufacturing method of the capacitive touch panel according to claim 7, wherein the insulating layer comprises a plurality of first insulating patterns and a plurality of second insulating patterns, and the first bridging parts and the second bridging parts The contact portions are respectively disposed on the first insulating patterns and the second insulating patterns. 9. The manufacturing method of the capacitive touch panel according to claim 8, wherein the first insulating patterns and the second insulating patterns are respectively arranged on both sides of the connecting sections, and are substantially perpendicular to the connecting sections segment. 10. The manufacturing method of the capacitive touch panel according to claim 7, wherein the compensating portion is located between the first bridging portion and the second bridging portion, and is substantially perpendicular to the first bridging portion and the second bridging portion. the second bridge. 11. The manufacturing method of the capacitive touch panel according to claim 7, wherein the geometric shape of the first bridging portion is the same as that of the second bridging portion. 12 . The manufacturing method of the capacitive touch panel according to claim 7 , wherein widths of the compensation portion, the first bridging portion and the second bridging portion are all less than or equal to 100 microns.

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