Touch screen metal wiring structure and electronic equipment

Abstract

The utility model discloses a touch screen metal wiring structure, which comprises a glass substrate, a metal wiring layer, a metal wiring layer, a metal wiring layer, a metal wiring layer, a metal wiring layer, a metal wiring layer, a metal wiring layer, a metal wiring layer and a metal wiring layer and is characterized in that the glass substrate comprises a touch screen area and a frame area; the touch control pattern layer is arranged on the surface of the glass substrate; the metal wire comprises a near-end region and a far-end region; the metal wire is arranged in the frame area, and the far-end area of the metal wire is electrically connected with the touch pattern layer; according to the utility model, the design that the widths of the wires are gradually increased from short to long is adopted, so that the problems of resistance difference and the like caused by the distance are solved, the channel resistance requirement is met, the risk that the metal wires are slightly broken is reduced, the reliability of the touch screen is enhanced, and the product yield is improved.

Description

Technical Field

[0001] The utility model relates to a touch screen, in particular to a metal wiring structure of a touch screen and an electronic device. Background Art

[0002] With the rapid development of touch screen technology, the application fields of touch screens are becoming wider and wider, and the size is also getting larger and larger. The larger the size, the more channels are required, the wiring length of each channel gradually increases, and the impedance of each channel also gradually increases accordingly. Not only is the uniformity of resistance affected, but also the probability of disconnection is relatively higher for long and short wiring designs with the same width. If the metal wiring is slightly disconnected, the channel will not be able to conduct, resulting in poor functionality of the touch screen, especially the micro-break, which has unstable functional problems. It may fail before shipment, it may also fail at the customer end, and it is not ruled out that it may fail during market use. Therefore, it will not only bring serious economic losses, but also cause unnecessary customer complaints.

[0003] like Figure 1 As shown, in the prior art, the metal traces are designed to have the same width regardless of distance, so that there is a gap from the first trace to the last trace, which affects the uniformity of resistance and makes the metal traces easily broken. Once a metal trace is slightly disconnected, it will affect the local touch screen function and the product yield is low. Utility Model Content

[0004] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a touch screen metal routing structure and an electronic device. By adopting a design in which the routing width gradually increases from short to long, the routing layout is optimized, thereby compensating for problems such as resistance differences caused by distance, meeting channel resistance requirements, reducing the risk of metal routing micro-breaks, enhancing the reliability of the touch screen, and improving product yield.

[0005] The technical problem to be solved by the utility model is achieved by the following technical solution: A metal wiring structure of a touch screen comprises: a glass substrate, comprising a touch screen area and a frame area, wherein the frame area is arranged around the touch screen area and has a binding position;

[0006] A touch pattern layer, the touch pattern layer is arranged in a touch screen area on the surface of the glass substrate;

[0007] A metal routing line, wherein the metal routing line includes a proximal region close to the binding site and a distal region far from the binding site;

[0008] The metal wiring is arranged in the frame area, the distal end area of ​​the metal wiring is electrically connected to the touch pattern layer, and the proximal end area of ​​the metal wiring is electrically connected to the binding position;

[0009] The closer the metal trace is to the distal region, the greater its width.

[0010] Furthermore, an OC layer is provided on the upper surface of the glass substrate.

[0011] Furthermore, the OC layer covers the touch pattern layer and the metal wiring.

[0012] Furthermore, the glass substrate frame area has a silk-screen ink layer.

[0013] Furthermore, the touch pattern layer includes a first ITO conductive layer, an insulating layer and a second ITO conductive layer stacked in sequence, and the first ITO conductive layer is disposed on the surface of the glass substrate.

[0014] Furthermore, the metal wiring is MoAlMo.

[0015] Furthermore, the metal routing is composed of a plurality of channels, and the closer the metal routing is to the distal region, the smaller its wiring density is.

[0016] Furthermore, the routing length of the channel gradually increases from the touch screen area to the frame area.

[0017] Furthermore, each channel resistance of the metal wiring is the same.

[0018] An electronic device is also provided, comprising any one of the above touch screen metal wiring structures.

[0019] The utility model has the following beneficial effects: a metal routing structure of a touch screen, comprising: a glass substrate, comprising a touch screen area and a frame area, wherein the frame area is arranged around the touch screen area; a touch pattern layer, wherein the touch pattern layer is arranged on the surface of the glass substrate; a metal routing, wherein the metal routing comprises a proximal area and a distal area; the metal routing is arranged in the frame area, wherein the distal area of ​​the metal routing is electrically connected to the touch pattern layer; the closer the metal routing is to the distal area, the greater its width is. The utility model adopts a design in which the routing width gradually increases from short to long, thereby compensating for problems such as resistance differences caused by distance, meeting channel resistance requirements, reducing the risk of metal routing micro-breaks, enhancing the reliability of the touch screen, and improving product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the metal wiring structure of the touch screen in the prior art;

[0022] Figure 2 This is a schematic diagram of the metal wiring structure of the touch screen of the utility model;

[0023] Figure 3 This is a front view of the metal wiring structure of the touch screen of the utility model;

[0024] Figure 4 This is a schematic diagram of the far-end area of ​​the metal wiring structure of the touch screen of the utility model;

[0025] Figure 5 This is another structural schematic diagram of the metal wiring structure of the touch screen of the utility model;

[0026] Figure 6 This is a schematic diagram of the ink layer of the metal wiring structure of the touch screen of the utility model;

[0027] Figure 7 It is a schematic diagram of the touch layer pattern structure of the metal wiring structure of the touch screen of the utility model.

[0028] 1. Glass substrate; 11. Touch screen area; 12. Frame area; 13. Ink layer; 2. Touch pattern layer; 21. First ITO conductive layer; 22. Insulation layer; 23. Second ITO conductive layer; 3. Metal traces; 31. Proximal area; 32. Distal area; 4. OC layer. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1

[0034] like Figure 1 As shown, in the prior art, there is a design for the current touch screen in which the metal traces are of the same width regardless of distance. This design will present a blank area from the first trace to the last trace of the metal trace channel, which affects the uniformity of the resistance and makes the metal traces easy to break. Once a metal trace is slightly disconnected, the channel will not be able to conduct, resulting in poor functionality of the touch screen, especially the micro-break will affect the local touch screen function, resulting in low product yield. This unstable functional problem may fail before shipment, or it may fail at the client end, and it is not ruled out that it may fail during market use, so it will not only bring serious economic losses, but also cause unnecessary customer complaints.

[0035] In order to solve this technical problem, the utility model provides a touch screen metal wiring structure, such as Figure 2 and Figure 3 As shown, it includes: a glass substrate 1, including a touch screen area 11 and a frame area 12, wherein the frame area 12 is arranged around the touch screen area 11 and has a binding position;

[0036] A touch pattern layer 2, wherein the touch pattern layer 2 is disposed in a touch screen area 11 on the surface of the glass substrate 1;

[0037] A metal wiring 3, wherein the metal wiring 3 comprises a proximal region 31 close to the binding position and a distal region 32 far from the binding position;

[0038] The metal trace 3 is disposed in the frame area 12, the distal area 32 of the metal trace 3 is electrically connected to the touch pattern layer 2, and the proximal area 31 of the metal trace 3 is electrically connected to the binding position;

[0039] The closer the metal trace 3 is to the distal region 32 , the greater its width is.

[0040] In the utility model, a glass substrate 1 is provided with a touch screen area 11 and a frame area 12, wherein the touch screen area 11 corresponds to a display area, and the frame area 12 corresponds to a non-display area, and a touch pattern layer 2 is provided in the display area of ​​the glass substrate 1; a metal trace 3 is provided in the non-display area of ​​the glass substrate 1, and is located at the periphery of the touch pattern layer 2, and includes a proximal area 31 and a distal area 32, and by optimizing the layout of the metal traces in the distal area 32, the width of the metal traces 3 in the distal area 32 is increased to reduce the channel resistance of the distal area 32, thereby compensating for the difference in resistance between channels caused by the length of each metal trace 3, and finally meeting the channel resistance requirement, while reducing the risk of micro-breakage of the metal traces, enhancing the reliability of the touch screen, and improving the product yield.

[0041] In this embodiment, an OC layer 4 is further provided on the upper surface of the glass substrate 1 and the OC layer 4 covers the touch pattern layer 2 and the metal wiring 3. The OC layer 4 can isolate the metal wiring 3 from contact with air and water, is not easily oxidized, and has higher reliability.

[0042] Further, such as Figure 5 and Figure 6 As shown, the frame area 12 of the glass substrate 1 is screen-printed with an ink layer 13. The ink layer 13 shields the metal trace 3 to prevent the metal trace 3 from being seen from the front of the touch screen. The utility model does not specifically limit the shape of the touch screen area 11 and the frame area 12, which can be rectangular, or other polygonal or irregular shapes.

[0043] The ink layer 13 is the frame area 12 of the black glass substrate 1. The ink layer 13 is usually composed of conductive ink and non-conductive ink. The conductive ink is used to make the electrodes of the touch screen, while the non-conductive ink is used to make the black frame and other patterns. The preparation of black ink is usually made by mixing raw materials such as pigments, resins, and solvents. Among them, pigments are the key components of black inks, and commonly used black pigments include carbon black, ferrite, carbon black, etc. Resins are binders for black inks, which can make the pigments evenly dispersed in the ink and tightly bonded to the surface of the material to be printed. Solvents are diluents for black inks, which can adjust the viscosity and fluidity of the ink to make it suitable for printing operations.

[0044] The preparation process of black ink generally includes the steps of grinding pigment, mixing resin and solvent, filtering and adjusting. The prepared black ink can be applied to the manufacture of touch screens by printing, spraying, etc. to form black borders and other patterns.

[0045] Embodiment 2

[0046] like Figure 7 As shown, the touch pattern layer 2 includes a first ITO conductive layer 21, an insulating layer 22, and a second ITO conductive layer 23 stacked in sequence, and the first ITO conductive layer 21 is disposed on the surface of the glass substrate 1. The first ITO conductive layer 21 and the second ITO conductive layer 23 are intersecting strip-shaped hollow patterns, and a plurality of touch sensing points are formed by the first ITO conductive layer 21 and the second ITO conductive layer 23. The touch pattern layer 2 collects screen touch information through the touch sensing points and then transmits it to the sensor through the metal traces 3.

[0047] like Figure 4 As shown, in this embodiment, the metal wiring 3 is further preferably made of MoAlMo molybdenum aluminum molybdenum material. In this embodiment, the electrical connection between the metal wiring 3 and the touch pattern layer 2 is a triangular design, wherein the two sides of the triangle are connected to the touch pattern layer 2.

[0048] In another preferred embodiment of the present application, one side of the triangle is perpendicular to the border area 12 .

[0049] In the present application, there is no specific limitation on the width and shape design of the distal region 32 of the metal trace 3, and the aforementioned triangle-like shape may be adopted, or other polygonal or irregular shapes may be adopted.

[0050] Furthermore, the metal wiring 3 is composed of a plurality of channels, and the closer the metal wiring 3 is to the distal region 32 , the smaller its wiring density is.

[0051] In this embodiment, the routing length of the channel gradually increases from the touch screen area 11 to the frame area 12 .

[0052] In another preferred solution of this embodiment, the width of the metal wiring 3 from the distal area 32 to the proximal area 31 is controlled to decrease gradually, so that the resistance of each channel of the metal wiring 3 is the same, thereby reducing the risk of micro-breakage of the metal wiring, enhancing the reliability of the touch screen, and improving the product yield.

[0053] Embodiment 3

[0054] The utility model also provides an electronic device, having a touch screen metal routing structure provided by the above utility model embodiment, comprising: a glass substrate 1, comprising a touch screen area 11 and a frame area 12, wherein the frame area 12 is arranged around the touch screen area 11; a touch pattern layer 2, wherein the touch pattern layer 2 is arranged on the touch screen area 11 on the surface of the glass substrate 1; a metal routing 3, wherein the metal routing 3 comprises a proximal area 31 and a distal area 32; the metal routing 3 is arranged in the frame area 12, wherein the distal area 32 of the metal routing 3 is electrically connected to the touch pattern layer 2; and the closer the metal routing 3 is to the distal area 32, the greater the width of the metal routing 3. In the utility model, a glass substrate 1 is provided with a touch screen area 11 and a frame area 12, wherein the touch screen area 11 corresponds to a display area, and the frame area 12 corresponds to a non-display area, and a touch pattern layer 2 is provided in the display area of ​​the glass substrate 1; a metal trace 3 is provided in the non-display area of ​​the glass substrate 1, and is located at the periphery of the touch pattern layer 2, and includes a proximal area 31 and a distal area 32. By optimizing the layout of the metal trace 3 in the distal area 32, the width of the metal trace 3 in the distal area 32 is increased to meet the channel resistance requirement, and the resistance difference between each channel is reduced, thereby reducing the risk of micro-breakage of the metal trace, enhancing the reliability of the touch screen, and improving the product yield.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A touch screen metal wiring structure, characterized in that: include: A glass substrate (1) comprising a touch screen area (11) and a frame area (12), wherein the frame area (12) is arranged around the touch screen area (11) and is provided with a binding position; A touch pattern layer (2), the touch pattern layer (2) being arranged in a touch screen area (11) on the surface of the glass substrate (1); A metal trace (3), the metal trace (3) comprising a proximal region (31) close to the binding site and a distal region (32) far from the binding site; The metal wiring (3) is arranged in the frame area (12), the distal area (32) of the metal wiring (3) is electrically connected to the touch pattern layer (2), and the proximal area (31) of the metal wiring (3) is electrically connected to the binding position; The closer the metal trace (3) is to the distal region (32), the greater its width.

2. The touch screen metal wiring structure according to claim 1, characterized in that: An OC layer (4) is provided on the upper surface of the glass substrate (1).

3. The touch screen metal wiring structure according to claim 2, characterized in that: The OC layer (4) covers the touch pattern layer (2) and the metal wiring (3).

4. The touch screen metal wiring structure according to claim 1, characterized in that: The frame area (12) of the glass substrate (1) has a silk-screen ink layer (13).

5. The touch screen metal wiring structure according to claim 1, characterized in that: The touch pattern layer (2) comprises a first ITO conductive layer (21), an insulating layer (22) and a second ITO conductive layer (23) stacked in sequence, and the first ITO conductive layer (21) is arranged on the surface of the glass substrate (1).

6. The touch screen metal wiring structure according to claim 1, characterized in that: The metal wiring (3) is MoAlMo.

7. The touch screen metal wiring structure according to claim 6, characterized in that: The metal wiring (3) is composed of a plurality of channels, and the closer the metal wiring (3) is to the distal region (32), the smaller its wiring density.

8. The touch screen metal wiring structure according to claim 7, characterized in that: The routing length of the channel gradually increases from the touch screen area (11) to the frame area (12).

9. The touch screen metal wiring structure according to any one of claims 6 to 8, characterized in that: The resistance of each channel of the metal wiring (3) is the same.

10. An electronic device, characterized in that: The invention comprises the metal wiring structure of a touch screen according to any one of claims 1 to 9.

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