CN111488077A - Touch panel and display device - Google Patents

Abstract

The application provides a touch panel and a display device, wherein the touch panel and the display device comprise a first electrode layer and a dielectric layer, the dielectric layer is arranged on the first electrode layer, the dielectric layer comprises a first dielectric layer and a second dielectric layer, the second dielectric layer is arranged on one side of the first dielectric layer, which is far away from the first electrode layer, and the surface roughness of the second dielectric layer is greater than that of the first dielectric layer; the scheme can prevent the second electrode layer from falling off from the dielectric layer when the second electrode layer is formed on the dielectric layer, and improves the adhesion between the second electrode layer and the dielectric layer.

Description

Touch panel and display device

technical field

The present application relates to the field of display technology, in particular to the manufacture of display devices, and in particular to touch panels and display devices.

Background technique

As an inductive device that can receive touch input signals, the touch screen enables users to give feedback by touching the touch screen when observing the information displayed on the screen, so as to carry out the human-computer interaction process.

At present, the touch screen includes a plurality of touch electrodes located in different layers, and the touch electrodes of adjacent layers are insulated by a perfluoroalkoxy resin material. However, the touch electrodes prepared on the film layer of the perfluoroalkoxy resin are The adhesion between the control electrode and the film layer of the perfluoroalkoxy resin is low, which causes the touch electrode to fall off from the film layer of the perfluoroalkoxy resin.

Therefore, it is necessary to provide a touch panel and a display device to improve the adhesion between the touch electrodes and the film layers below them.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a touch panel and a display device. By arranging a second dielectric layer on the first dielectric layer, and the surface roughness of the second dielectric layer is greater than that of the first dielectric layer, the solution can be solved. In the prior art, the second electrode layer is directly prepared on the first dielectric layer, resulting in low adhesion between the second electrode layer and the first dielectric layer, resulting in the second electrode layer being easily removed from the first dielectric layer. shedding problem.

Embodiments of the present application provide a touch panel, and the touch panel includes:

the first electrode layer;

a dielectric layer, the dielectric layer is disposed on the first electrode layer, and the dielectric layer includes:

a first dielectric layer;

A second dielectric layer, the second dielectric layer is disposed on the side of the first dielectric layer away from the first electrode layer, and the surface roughness of the second dielectric layer is greater than that of the first dielectric layer Surface roughness of the electrical layer.

In one embodiment, the constituent material of the second dielectric layer includes at least one of silicon nitride, silicon oxide, and silicon oxynitride.

In one embodiment, the constituent material of the first dielectric layer is an organic insulating material.

In one embodiment, the constituent material of the first dielectric layer includes perfluoroalkoxy resin.

In one embodiment, the preparation temperature of the first dielectric layer is not higher than 200°.

In one embodiment, the thickness of the first dielectric layer is not less than 3 microns.

In one embodiment, the touch panel further includes a second electrode layer, and the second electrode layer is disposed on a side of the dielectric layer away from the first electrode layer.

In one embodiment, the touch panel further includes an insulating layer, and the insulating layer is disposed on a side of the second electrode layer away from the first electrode layer.

In one embodiment, the composition material of the insulating layer and the composition material of the first dielectric layer are the same, or the composition material of the insulating layer and the composition material of the second dielectric layer are the same.

An embodiment of the present application further provides a display device, the display device includes a color filter substrate, a polarizer, a cover plate and the touch panel as described above, and the polarizer is provided on the color filter substrate and the cover plate between;

The touch panel is arranged on the side of the polarizer close to the cover plate, or the touch panel is arranged between the polarizer and the color filter substrate, or the touch panel is arranged on the A side of the color filter substrate away from the polarizer.

The present application provides a touch panel and a display device, the touch panel and the display device include a first electrode layer and a dielectric layer, the dielectric layer is disposed on the first electrode layer, and the dielectric layer includes a first dielectric layer and a first dielectric layer. Two dielectric layers, the second dielectric layer is disposed on the side of the first dielectric layer away from the first electrode layer, and the surface roughness of the second dielectric layer is greater than that of the first dielectric layer It can be understood that if a second dielectric layer with a roughness greater than that of the first dielectric layer is arranged between the second electrode layer and the first dielectric layer, when the second electrode layer is prepared on the dielectric layer, the The two dielectric layers improve the adhesion between the second electrode layer and the dielectric layer, and reduce the risk of the second electrode layer falling off the dielectric layer.

Description of drawings

The present application will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings in the following description are only used to explain some embodiments of the present application, and for those skilled in the art, without creative efforts, other Attached.

FIG. 1 is a schematic cross-sectional view of a first touch panel according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of a second touch panel according to an embodiment of the present application.

FIG. 3 is a physical diagram of the first attachment of the perfluoroalkoxy resin film layer on the metal film layer provided by the embodiment of the present application.

FIG. 4 is a physical diagram of the second type of attachment of the perfluoroalkoxy resin film layer on the metal film layer provided by the embodiment of the present application.

FIG. 5 is a third physical diagram of the attachment of the perfluoroalkoxy resin film layer on the metal film layer provided by the embodiment of the present application.

FIG. 6 is a physical diagram of the fourth type of attachment of the perfluoroalkoxy resin film layer on the metal film layer provided by the embodiment of the present application.

FIG. 7 is a physical diagram of the first attachment of the metal film layer on the perfluoroalkoxy resin film layer provided by the embodiment of the present application.

FIG. 8 is a physical diagram of the second type of attachment of the metal film layer on the perfluoroalkoxy resin film layer provided by the embodiment of the present application.

FIG. 9 is a third physical diagram of the attachment of the metal film layer on the perfluoroalkoxy resin film layer provided by the embodiment of the present application.

FIG. 10 is a physical diagram of the fourth type of attachment of the metal film layer on the perfluoroalkoxy resin film layer provided by the embodiment of the application.

FIG. 11 is a schematic cross-sectional view of a third touch panel according to an embodiment of the present application.

FIG. 12 is a schematic cross-sectional view of a fourth touch panel provided by an embodiment of the present application.

FIG. 13 is a schematic cross-sectional view of a fifth touch panel according to an embodiment of the present application.

FIG. 14 is a schematic cross-sectional view of a first display device according to an embodiment of the present application.

FIG. 15 is a schematic cross-sectional view of a second display device according to an embodiment of the present application.

FIG. 16 is a schematic cross-sectional view of a third display device according to an embodiment of the present application.

FIG. 17 is a schematic cross-sectional view of a fourth display device according to an embodiment of the present application.

FIG. 18 is a schematic cross-sectional view of a fifth display device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "far away", "closer", "perpendicular", etc. is based on the orientation or positional relationship shown in the drawings, for example, "far away" is only a surface It is far away from one side of an object, and it can be as far away as it is, or there is no limit to how many layers of film are separated from the object; "relative" or "corresponding" refers to two relative positions of the object that can be reflected in the figure. , the two positions may be in direct/indirect contact with the object, the above orientation or positional relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, a specific orientation The orientation configuration and operation are therefore not to be construed as limitations on the present application.

In addition, it should be noted that the attached drawings only provide structures that are closely related to the present application, and some details that are not related to the application are omitted, for the purpose of simplifying the drawings and making the application point clear at a glance, rather than indicating the actual The device is exactly the same as the attached drawings, and is not intended to limit the actual device and method.

The present application provides a display device, which includes but is not limited to the display panel in the following embodiments.

The present application provides a touch panel, and the touch panel includes but is not limited to the following embodiments.

In one embodiment, as shown in FIGS. 1-2 , the touch panel 00 includes: a first electrode layer 10 and a dielectric layer 20 , and the dielectric layer 20 is disposed on the first electrode layer 10 ; The dielectric layer 20 includes a first dielectric layer 201 and a second dielectric layer 202 , and the second dielectric layer 202 is disposed on the side of the first dielectric layer 201 away from the first electrode layer 10 , the surface roughness of the second dielectric layer 202 is greater than the surface roughness of the first dielectric layer 201 .

It can be understood that the influence of roughness on the adhesion between the substrate and the coating is as follows: First, the unevenness of the surface of the substrate leads to the phenomenon of mutual occlusion when the coating is attached to it, which increases the adhesion; , the greater the surface roughness of the substrate, the greater the real surface area, and the corrosion products of the coating are not easy to diffuse when the surface of the substrate corrodes, so the adhesion is not easy to decrease.

In one embodiment, the constituent material of the second dielectric layer 202 includes at least one of silicon nitride, silicon oxide, and silicon oxynitride. Specifically, the second dielectric layer 202 may be a composite film layer made of silicon nitride and silicon oxide, wherein the upper and lower order of the silicon nitride and silicon oxide film layers is not limited.

Specifically, in the embodiment of the present invention, the silicon nitride film layer is prepared by plasma-enhanced chemical vapor deposition, and the roughness is about 3 nanometers; the silicon oxide film layer can be prepared by plasma-enhanced chemical vapor deposition method. Method or liquid deposition method, the roughness is about 1.8-3 nanometers. It can be understood that, in order to increase the surface roughness of the second dielectric layer 202, the temperature, pressure or other parameters of film formation can be adjusted appropriately to ensure that the second dielectric layer 202 has better surface roughness, to increase its adhesion.

It can be understood that since the second dielectric layer 20 is made of inorganic materials such as silicon nitride, silicon oxide, silicon oxynitride, etc., the surface roughness is relatively large. Therefore, if the second dielectric layer 20 is prepared on the second dielectric layer 202 later For other electrodes, the roughness between the dielectric layer 20 and the electrodes located on the dielectric layer 20 can be increased. It can be understood that since the second dielectric layer 202 is made of inorganic insulating material, the thickness of the second dielectric layer 202 is generally less than 1 micron. Meanwhile, it can be understood that since the second dielectric layer 202 is prepared by at least one of silicon nitride, silicon oxide, and silicon oxynitride, the baking temperature of the second dielectric layer 202 is 100° C. to 150° C. It can be dried to form a film at ℃.

In one embodiment, the constituent material of the first dielectric layer 201 is an organic insulating material. It can be understood that the constituent materials of the first dielectric layer 201 and the second dielectric layer 202 are both insulating materials, so the dielectric layer 20 can prevent the first electrode layer 10 and the Conduction between electrodes on a dielectric layer 201 .

In one embodiment, the composition material of the first dielectric layer 201 includes perfluoroalkoxy resin, copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, or polytetrafluoroethylene. at least one.

In one embodiment, the thickness of the first dielectric layer 201 is not less than 3 microns. It can be understood that since the thickness of the second dielectric layer 202 is generally less than 1 micron, it is difficult to make the capacitance formed by the first electrode layer 10 and the electrodes located on the dielectric layer 20 meet the requirements. By using silicon nitride, silicon oxide, silicon oxynitride and other inorganic substances to prepare the second dielectric layer 202, the thickness of the second dielectric layer 202 can be increased to increase the thickness of the dielectric layer 20, so that The distance between the first electrode layer 10 and the electrodes located on the dielectric layer 20 is not less than 3 microns, so that the first electrode layer 10 and the electrodes located on the dielectric layer 20 constitute both capacitor to meet the requirements.

It should be noted that, since the first dielectric layer 201 is directly prepared on the first electrode layer 10, in order to avoid the oxidation of the first electrode layer 10 under high temperature conditions, the first electrode layer 10 The resistance of the electrode increases, which affects the subsequent contact resistance between the electrode and other electrodes, thereby causing the related circuit to be disconnected. The preparation temperature of the first dielectric layer 201 is not higher than 200°.

Specifically, as shown in FIGS. 3-10 , in different environments, the perfluoroalkoxy resin film layer 100 is attached on the metal film layer 200 and the metal film layer 200 is attached on the perfluoroalkoxy resin film layer 100 real picture. For the perfluoroalkoxy resin film layer 100 on the metal film layer 200, as shown in FIG. , Specifically, Figure 3 is the adhesion situation when the composite film layer is not subjected to any treatment, Figure 4 is the adhesion situation when only a force is applied to the composite film layer, and Figure 5 is only the composite film layer is subjected to warm water. The adhesion situation during treatment, Figure 6 shows the adhesion situation when the composite membrane layer is treated with warm water and a force is applied to the composite membrane layer. It can be seen from Figure 3-6 that no matter whether it has been treated with warm water or with or without force , the adhesion between the perfluoroalkoxy resin film layer 100 and the metal film layer 200 is good. Among them, warm water treatment can be understood as treating the composite film layer to prevent the metal film layer 200 from being oxidized, and force can be understood as applying a force to the composite film layer to further verify the adhesion between different film layers. For the metal film layer 200 on the perfluoroalkoxy resin film layer 100, as shown in Figs. In the four regions, specifically, Fig. 7 shows the adhesion situation when the composite film layer is not subjected to any treatment, Fig. 8 shows the adhesion situation when only applying a force to the composite film layer, and Fig. 9 shows the adhesion situation when only the composite film layer is The adhesion situation of the composite membrane layer when it is treated with warm water. Figure 10 shows the adhesion situation when the composite membrane layer is treated with warm water and a force is applied to the composite membrane layer. It can be seen from Figure 7-10 that: when a force is applied , the adhesion between the metal film layer 200 and the perfluoroalkoxy resin film layer 100 is very poor. The metal film layer 200 in each region is lifted from the perfluoroalkoxy resin film layer 100 or even peeled off.

It can be understood that in the present invention, the second dielectric layer 202 is provided on the first dielectric layer 201 made of perfluoroalkoxy resin, and the second dielectric layer 202 includes nitridation At least one of silicon, silicon oxide, and silicon oxynitride can improve the adhesion between other electrodes made of metal above the second dielectric layer 202 and the dielectric layer 20, and through the figure 3-10 It can be seen that the adhesion between the first dielectric layer 201 made of perfluoroalkoxy resin and the first electrode layer 10 made of metal is also good, and there is no falling off The problem.

In one embodiment, as shown in FIG. 2 , the first electrode layer 10 includes a plurality of first electrodes 101 , and the plurality of first electrodes 101 are arranged in parallel and spaced apart from each other, and the first dielectric layer 201 may be It is completely filled between two adjacent first electrodes 101 and covers the first electrode layer 10 , and the first dielectric layer 201 is in the area corresponding to the first electrode layer 10 , Patterning processing may not be required. Wherein, the thickness of the first dielectric layer 201 covering the first electrode layer 10 is not less than 3 microns.

In one embodiment, the first electrode layer 10 may be prepared by using at least one of metal, transparent electrode material, silver nanowires or graphene. Further, in order to increase the amount of light passing through the touch panel 00, The first electrode layer 10 can be prepared by using a transparent electrode material.

In one embodiment, as shown in FIG. 11 , the touch panel 00 further includes a second electrode layer 30 , and the second electrode layer 30 is disposed on a part of the dielectric layer 20 away from the first electrode layer 10 . side. Specifically, the second electrode layer 30 may also include a plurality of second electrodes, the plurality of second electrodes are arranged parallel to each other and spaced apart, and the plurality of second electrodes are arranged to intersect with the plurality of first electrodes, Further, the plurality of second electrodes may be arranged perpendicular to the plurality of first electrodes. It can be understood that, for the material of the second electrode layer 30 , reference may be made to the relevant description of the material of the first electrode layer 10 .

In one embodiment, as shown in FIG. 12 , the touch panel 00 further includes an insulating layer 40 , and the insulating layer 40 is disposed on a side of the second electrode layer 30 away from the first electrode layer 10 . Specifically, the insulating layer 40 includes a plurality of insulating portions, the insulating portions are arranged opposite to the second electrodes, and the insulating portions are arranged on the surfaces of the corresponding second electrodes. It can be understood that, for the specific positional relationship between the insulating layer 40 and the second electrode layer 30, reference may be made to the specific positional relationship between the first dielectric layer 201 and the first electrode layer 10 above. The insulating layer 40 can prevent conduction between the second electrode layer 30 and other conductive structures of the touch panel 00 .

In one embodiment, the preparation temperature of the insulating layer 40 is not higher than 200°. Further, the specific material of the insulating layer 40 may be the same as that of the first dielectric layer 201 or the second dielectric layer 202 . Similarly, when the insulating layer 40 is formed at a temperature of 100° C. to 200° C., the second electrode layer 30 will not be oxidized during the temperature, that is, the risk of circuit breakage can be reduced.

In one embodiment, as shown in FIG. 13 , the touch panel 00 further includes a signal transmission layer, and the signal transmission layer is disposed on the side of the insulating layer 40 away from the first electrode layer 10 . The signal transmission layer includes a plurality of signal transmission parts 501 , the dielectric layer 20 , the second electrode layer 30 and the insulating layer 40 are provided with first vias 03 , and the insulating layer 40 is provided with second vias 04. Specifically, the first via hole 03 and the second via hole 04 are filled with conductive material, and the first via hole 03 is provided between the first electrode part 101 and the corresponding signal transmission part 501 , For electrically connecting the first electrode part 101 and the corresponding signal transmission part 501 , the second via hole 04 is provided between the second electrode part 201 and the corresponding signal transmission part 501 for electrical connection The second electrode part 201 and the corresponding signal transmission part 501 are connected. It can be understood that the signal transmission part 501 may include a plurality of contact points, the signal transmission part 501 is electrically connected to the external flexible circuit board, and different contact points can receive corresponding electrical signals, and the electrical signals pass through the The signal transmission part 501 , the first via hole 03 and the second via hole 04 are respectively transmitted to the first electrode layer 10 and the second electrode layer 30 . It can be understood that, for the material of the signal transmission layer, reference may be made to the relevant description of the material of the first electrode layer 10 .

The present application also provides a display device, the display device comprising the touch panel described in any of the above.

In one embodiment, the display device 000 may be a liquid crystal display device including a liquid crystal layer. As shown in FIGS. 14-16 , the display device 000 includes a color filter substrate 60 , a polarizer 70 , a cover plate 80 and the In the touch panel 00 , the polarizer 70 is disposed between the color filter substrate 60 and the cover plate 80 . Specifically, as shown in FIG. 14 , the touch panel 00 is disposed on the side of the polarizer 70 close to the cover plate 80 to form an external display device 000 ; as shown in FIG. 15 , or the The touch panel 00 is arranged between the polarizer 70 and the color filter substrate 60 to form an on-cell display device 000 (embedding the touch screen between the color filter substrate and the polarizer of the display screen); As shown in FIG. 16 , or the touch panel 00 is disposed on the side of the color filter substrate 60 away from the polarizer 70 to form an in-cell (embedding the touch panel function between two plates).

Further, taking On-cell as an example here, when the display device 000 includes a liquid crystal layer 90, as shown in FIG. 17, the display device 000 further includes an array substrate 100, and the liquid crystal layer 90 is disposed on the color The film substrate 60 is on the side away from the touch panel 00 , and the array substrate 100 is disposed on the side of the liquid crystal layer 90 away from the color filter substrate 60 .

In one embodiment, the display device 000 may also be an organic light-emitting display device including a light-emitting device layer. As shown in FIG. 18 , the display device 000 includes a substrate 200 , a light-emitting device layer 300 , an encapsulating glass layer 400 , The touch panel 00 , the polarizer 500 , the transparent optical adhesive layer 600 and the cover glass layer 700 are described. Specifically, the encapsulation glass layer 400 may be fabricated on the encapsulation glass layer 400 , and then the other side of the encapsulation glass layer 400 is attached to the display panel including the light emitting device layer 300 through transparent optical glue.

The present application provides a touch panel and a display device, the touch panel and the display device include a first electrode layer and a dielectric layer, the dielectric layer is disposed on the first electrode layer, and the dielectric layer includes a first dielectric layer and a first dielectric layer. Two dielectric layers, the second dielectric layer is disposed on the side of the first dielectric layer away from the first electrode layer, and the surface roughness of the second dielectric layer is greater than that of the first dielectric layer It can be understood that if a second dielectric layer with a roughness greater than that of the first dielectric layer is arranged between the second electrode layer and the first dielectric layer, when the second electrode layer is prepared on the dielectric layer, the The two dielectric layers improve the adhesion between the second electrode layer and the dielectric layer, and reduce the risk of the second electrode layer falling off the dielectric layer.

The structures of the touch panel and the display device provided by the embodiments of the present application have been described in detail above, and the principles and implementations of the present application are described with specific examples. The technical solution of the application and its core idea; those of ordinary skill in the art should understand that: it can still make modifications to the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements, The essence of the corresponding technical solutions does not deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A touch panel, comprising:

a first electrode layer;

a dielectric layer disposed on the first electrode layer, the dielectric layer comprising:

a first dielectric layer;

the second dielectric layer is arranged on one side, far away from the first electrode layer, of the first dielectric layer, and the surface roughness of the second dielectric layer is larger than that of the first dielectric layer.

2. The touch panel of claim 1, wherein the second dielectric layer comprises at least one of silicon nitride, silicon oxide, and silicon oxynitride.

3. The touch panel of claim 1, wherein the first dielectric layer is made of an organic insulating material.

4. The touch panel according to any one of claims 1 or 3, wherein a constituent material of the first dielectric layer comprises a perfluoroalkoxy resin.

5. The touch panel according to any one of claims 1 or 3, wherein the first dielectric layer is prepared at a temperature of not higher than 200 °.

6. The touch panel of any one of claims 1 or 3, wherein the first dielectric layer has a thickness of not less than 3 μm.

7. The touch panel of claim 1, further comprising a second electrode layer disposed on a side of the dielectric layer away from the first electrode layer.

8. The touch panel of claim 7, further comprising an insulating layer disposed on a side of the second electrode layer away from the first electrode layer.

9. The touch panel according to claim 8, wherein a constituent material of the insulating layer is the same as a constituent material of the first dielectric layer, or a constituent material of the insulating layer is the same as a constituent material of the second dielectric layer.

10. A display device, comprising a color film substrate, a polarizer, a cover plate and the touch panel of any one of claims 1 to 9, wherein the polarizer is disposed between the color film substrate and the cover plate;

the touch panel is arranged on one side, close to the cover plate, of the polarizer, or the touch panel is arranged between the polarizer and the color film substrate, or the touch panel is arranged on one side, far away from the polarizer, of the color film substrate.

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