High-reliability nanometer silver capacitive screen

Abstract

This invention belongs to the field of capacitive touchscreen technology, and particularly relates to a high-reliability nano-silver capacitive touchscreen. The touchscreen includes a substrate layer and a conductive layer. A sensing electrode and electrode leads are disposed on the conductive layer, and the electrode leads and sensing electrodes are connected via a triangular overlap. In this high-reliability nano-silver capacitive touchscreen, the electrode leads and sensing electrodes of the conductive layer are connected via a triangular overlap, reducing the contact area between the silver paste leads and the nano-silver electrodes. This reduces the accumulation of moisture at the silver paste overlap, lowering the risk of touchscreen failure. The resulting touchscreen has a lifespan of up to 1000 hours under 85℃ / 85%RH conditions, significantly improving reliability.

Description

Technical Field

[0001] This invention belongs to the field of capacitive screen technology, and particularly relates to a high-reliability nano-silver capacitive screen. Background Technology

[0002] Capacitive touchscreens achieve touch sensing through sensing electrodes and conduction through electrode leads. Therefore, maintaining the stability of the sensing electrodes and electrode leads to ensure proper connection and conduction is crucial for the normal functioning of the capacitive touchscreen. However, nano-silver is susceptible to corrosion due to moisture, which can lead to silver migration and corrosion failure. The failure site of nano-silver in capacitive touchscreens is usually at the junction of the sensing electrodes and electrode leads. Although current nano-silver capacitive touchscreens use adhesive to seal around the sensor and at the bonding area, it is still not possible to completely prevent moisture from entering through the silver adhesive junction and corroding the nano-silver, causing the capacitive touchscreen to malfunction.

[0003] The failure of nano-silver capacitive touchscreens due to moisture erosion is mainly because the sensing electrodes and electrode leads of their conductive layer are usually connected in a conventional rectangular overlap, meaning the overlap pattern is rectangular. Since the overlap pattern coincides with the sensing electrode in the Z-axis direction, there is a step of about 6-10µm at the overlap of the silver paste lead and the nano-silver electrode (near the cover glass window). After the black ink is screen-printed on the glass cover, there is an unevenness. Under capillary action, moisture in the air is adsorbed onto the silver paste overlap at the step and accumulates, causing the nano-silver electrode near the silver paste overlap to be corroded by moisture, resulting in increased impedance and non-conductivity. This causes the capacitive touchscreen channel to open, resulting in touch function failure.

[0004] For example, Chinese utility model patent CN204965383U discloses a touch screen and its cover plate, the specification of which is attached. Figure 4 The existing rectangular overlapping method has been disclosed (see attached). Figure 4 The overlap portion 2322 (pattern is rectangular) in this patent reduces the "ghosting" phenomenon of the capacitive touchscreen by setting virtual electrode blocks, but it does not solve the problem of easy failure at the overlap of the capacitive touchscreen, resulting in poor stability. Existing research also rarely considers the problem of capacitive touchscreen overlap failure, or has failed to find a good solution, leading to poor reliability of the capacitive touchscreen and greatly reducing its service life. Therefore, providing a capacitive touchscreen with higher stability is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a high-reliability nano-silver capacitive touchscreen. By employing a triangular overlap between the electrode leads and the sensing electrodes, the contact area between the silver paste and the nano-silver is reduced. This reduces the accumulation of moisture at the silver paste overlap, thereby lowering the risk of touchscreen failure and improving its reliability.

[0006] A high-reliability nano-silver capacitive screen includes a substrate layer and a conductive layer. The conductive layer is provided with a sensing electrode and an electrode lead. The electrode lead and the sensing electrode are connected by a triangular overlap.

[0007] A triangular overlapping method is used, with the overlap width of the silver paste decreasing closer to the capacitive screen window. This reduces the risk of moisture accumulating inside the window. Theoretically, as long as the nano-silver at least 1mm wide near the apex of the triangle does not fail, the conductivity of the entire sensing electrode overlap will not be lost. Compared to other shapes such as circles or semicircles, the triangular silver paste pattern reduces moisture accumulation more effectively. When using circular or semicircular patterns, moisture easily accumulates around the pattern, causing the nano-silver at the edge of the overlap to fail entirely.

[0008] In some embodiments, the electrode leads and the sensing electrode are connected by a single-triangle or double-triangle connection.

[0009] In some embodiments, the electrode lead includes a lap portion, a connecting portion, and a routing portion connected in sequence. The lap portion overlaps with the sensing electrode, and the lap portion includes one or two triangular lap patterns. Preferably, the lap pattern is an isosceles triangle; more preferably, the electrode lead and the sensing electrode are connected by a double-triangular lap, and the lap portion includes two triangular lap patterns.

[0010] In some embodiments, the overlap includes two separate triangular overlap patterns.

[0011] In some embodiments, the width of the triangular overlapping pattern is 1.0-3.0 mm and the height is 0.5-2.0 mm.

[0012] Specifically, when the electrode lead and the sensing electrode are connected by a single triangle, the connection includes a triangular connection pattern with a width of 1.5-3.0 mm and a height of 1.0-2.0 mm. Preferably, the width of the triangular connection pattern is 2.5 mm and the height is 1.8 mm. When the electrode lead and the sensing electrode are connected by a double triangle, the connection includes two separate triangular connection patterns. Each triangular connection pattern has a width of 1.0-1.5 mm and a height of 0.5-1.0 mm, and the distance between the two triangular connection patterns is 0.5-2.0 mm. Preferably, each triangular connection pattern has a width of 1.0 mm and a height of 0.5 mm, and the distance between the two triangular connection patterns is 1.5 mm.

[0013] In some embodiments, the width of the connecting portion is adapted to the width of the overlapping portion, and the height of the connecting portion is 0.1-0.5 mm. Specifically, the width of the connecting portion is equal to or slightly greater than the width of the overlapping portion; when the electrode lead and the sensing electrode adopt a single triangular overlap, the width of the connecting portion is 2.0-3.5 mm, and when the electrode lead and the sensing electrode adopt a double triangular overlap, the width of the connecting portion is 2.0-4.0 mm.

[0014] In some embodiments, the substrate layer is a glass cover.

[0015] In some embodiments, the sensing electrode is a nano-silver electrode, and the electrode leads are silver paste leads.

[0016] In some embodiments, the sensing electrode includes an RX electrode and / or a TX electrode.

[0017] In some embodiments, the capacitive screen includes either a GFF structure or a GF2 structure.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] (1) The high reliability nano-silver capacitive screen of the present invention adopts a triangular overlap between the electrode lead and the sensing electrode of the conductive layer of the capacitive screen, thereby reducing the contact area between the silver paste lead and the nano-silver electrode, thereby reducing the accumulation of water vapor at the silver paste overlap, reducing the risk of capacitive screen failure, and the resulting capacitive screen can achieve a lifespan of up to 1000H under the conditions of 85℃ / 85%RH, which greatly improves the reliability.

[0020] (2) The high reliability nano-silver capacitive screen of the present invention adopts double triangular overlap of the electrode lead and the sensing electrode of the conductive layer of the capacitive screen. The two triangular overlap patterns are separated from each other, thereby providing two independent conductive channels for the electrode lead and the sensing electrode. By increasing the conductive channels, the risk of capacitive screen failure is reduced and its reliability is improved.

[0021] (3) The high-reliability nano-silver capacitive screen of the present invention further reduces the area of ​​the electrode lead connection, thereby reducing the risk of moisture being conducted from the electrode lead connection to the overlap, and can reduce the influence of the electrode lead connection on the near-end capacitance of the sensing electrode, making the product capacitance value distribution more uniform.

[0022] (4) The high-reliability nano-silver capacitive screen of the present invention reduces the amount of silver paste used in the lead wires by changing the overlapping pattern, thereby further reducing the cost. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the capacitive touchscreen of the present invention;

[0025] Figure 2 This is a schematic diagram of the single-triangle overlapping conductive layer of the capacitive touchscreen of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the double-triangular overlapping conductive layer of the capacitive touchscreen of the present invention;

[0027] Figure 4 This is a schematic diagram of a partial overlap structure of the conductive layer of the capacitive touchscreen in Embodiment 1 of the present invention;

[0028] Figure 5 This is a schematic diagram of a partial overlap structure of the conductive layer of the capacitive touchscreen in Embodiment 4 of the present invention;

[0029] Figure 6 This is a schematic diagram of a partial overlap structure of the conductive layer of the capacitive touchscreen in Comparative Example 1.

[0030] Figure 7 This is a schematic diagram of the partial overlap structure of the conductive layer of the capacitive screen in Comparative Example 2.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100, Conductive layer; 110, Sensing electrode; 120, Electrode lead; 121, Wiring section; 122, Connecting section; 123, Overlapping section; 200, Substrate layer. Detailed Implementation

[0033] Unless otherwise specified, the experimental methods described in the following embodiments of the present invention are generally performed under conventional conditions or as recommended by the manufacturer. All commonly used chemical reagents used in the embodiments are commercially available products.

[0034] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0035] The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps is not limited to the steps or modules listed, but may optionally include steps not listed, or may optionally include other steps inherent to such process, method, product, or device.

[0036] In this invention, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0037] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0038] A high-reliability nano-silver capacitive screen, such as Figure 1-3 As shown, the capacitive screen includes a substrate layer 200 and a conductive layer 100. A sensing electrode 110 and an electrode lead 120 are disposed on the conductive layer. The electrode lead 120 and the sensing electrode 110 are connected by a triangular overlap.

[0039] Specifically, the electrode lead 120 and the sensing electrode 110 are connected by a single-triangular overlap or a double-triangular overlap. It should be noted that the conductive layer may include multiple sets of sensing electrodes and multiple sets of electrode leads, with each set of sensing electrodes overlapping with a corresponding set of electrode leads to achieve conductivity. Specifically, a triangular overlap means that the pattern at the overlap between the electrode lead and the sensing electrode is a triangle; a single triangular overlap means that the pattern at the overlap between each electrode lead and its corresponding sensing electrode is one triangle; and a double triangular overlap means that the pattern at the overlap between each electrode lead and its corresponding sensing electrode is two triangles.

[0040] By setting the overlap pattern of the sensing electrode and the electrode lead to a triangle, the contact area can be greatly reduced while ensuring sufficient double contact to achieve conduction. The perimeter of the overlap is also shortened, thereby reducing the probability of water vapor accumulating at the overlap of the sensing electrode and the electrode lead. Furthermore, the triangular overlap can utilize the characteristics of the triangular pattern to reduce the stress generated by water vapor accumulation near the overlap, thus avoiding the risk of failure caused by large-area water vapor accumulation and erosion of the sensing electrode, thereby improving the reliability of the nano-silver capacitive screen.

[0041] Specifically, the electrode lead includes an overlap portion 123, a connecting portion 122, and a routing portion 121 connected in sequence. The overlap portion 123 overlaps with the sensing electrode 110, and the overlap portion 123 includes one or two triangular overlap patterns. Preferably, the electrode lead and the sensing electrode are connected by a double-triangular overlap, and the overlap portion includes two triangular overlap patterns.

[0042] Specifically, the overlapping portion 123 includes two mutually separate triangular overlapping patterns.

[0043] By setting two overlapping triangular patterns, the sensing electrode can be made conductive to the electrode lead through both patterns. Furthermore, the two overlapping patterns are separated, so if one pattern fails, the other can maintain conductivity, ensuring the normal operation of the capacitive touchscreen. Through numerous experiments, the inventors discovered that using two overlapping triangular patterns ensures effective overlap, reduces the risk of moisture corrosion, and extends the lifespan of the touchscreen. However, when more overlapping triangular patterns are used, the minimum area of ​​each pattern remains fixed to ensure proper conductivity. This means that as the number of patterns increases, the contact area between the sensing electrode and the electrode lead increases, while the distance between the patterns decreases, leading to a larger overlap perimeter. This increases the likelihood of moisture accumulation, making the touchscreen more susceptible to moisture corrosion and potential failure.

[0044] Specifically, the width of the triangular overlap pattern is 1.0-3.0 mm, and the height is 0.5-2.0 mm. When the electrode lead and the sensing electrode are connected by a single triangle, the overlap portion includes a triangular overlap pattern with a width of 1.5-3.0 mm and a height of 1.0-2.0 mm. Preferably, the width of the triangular overlap pattern is 2.5 mm, and the height is 1.8 mm. When the electrode lead and the sensing electrode are connected by a double triangle, the overlap portion includes two separate triangular overlap patterns. Each triangular overlap pattern has a width of 1.0-1.5 mm and a height of 0.5-1.0 mm, and the distance between the two triangular overlap patterns is 0.5-2.0 mm. Preferably, each triangular overlap pattern has a width of 1.0 mm and a height of 0.5 mm, and the distance between the two triangular overlap patterns is 0.8 mm.

[0045] Specifically, the width of the connecting portion 122 is adapted to the width of the overlapping portion 123, and the height of the connecting portion 122 is 0.1-0.5mm. Specifically, the width of the connecting portion is equal to or slightly greater than the width of the overlapping portion; when the electrode lead and the sensing electrode use a single triangular overlap, the width of the connecting portion is 2.0-3.5mm; when the electrode lead and the sensing electrode use a double triangular overlap, the width of the connecting portion is 2.0-4.0mm. This invention further reduces the height of the connecting portion, which on the one hand reduces the risk of moisture being conducted through the electrode lead connecting portion to the junction of the silver paste and nano-silver, and on the other hand reduces the influence of the electrode lead connecting portion on the near-end capacitance value of the capacitive touchscreen sensing electrode, making the capacitance value distribution of the product more uniform, avoiding the occurrence of jump points, and also helps to save the amount of silver paste used, reducing costs.

[0046] Specifically, the substrate layer 200 is a glass cover plate, the sensing electrode 110 is a nano-silver electrode, and the electrode lead 120 is a silver paste lead. Due to the overlap between the sensing electrode on the conductive film and the electrode lead, steps exist at the overlap. When a glass cover plate is used as the substrate layer, its surface has high smoothness and a certain degree of hardness. After black ink is screen-printed on the bonding surface of the glass cover plate, the presence of these steps at the overlap will result in an uneven surface. Under capillary action, these uneven structures easily attract moisture from the air to the silver paste overlap at the steps, causing it to accumulate. This leads to corrosion of the nano-silver electrode at the overlap point by moisture, resulting in increased impedance and non-conductivity, causing an open circuit in the capacitive screen channel and touch function failure. It should be noted that while the design of this invention provides good resistance to moisture erosion for nano-silver capacitive screens using a glass cover plate as the substrate layer, the material of the substrate layer is not a limitation of this invention.

[0047] Specifically, the sensing electrode 110 includes an RX electrode and / or a TX electrode, and the capacitive screen includes either a GFF structure or a GF2 structure. When the sensing electrode is an RX electrode, the electrode lead is an RX electrode lead; when the sensing electrode is a TX electrode, the electrode lead is a TX electrode lead. Capacitive screens with different structures typically have different numbers, structures, and positions of conductive layers. Since moisture usually penetrates from the cover plate bonding surface, in this invention, it is only necessary to ensure that the conductive layer sensing electrode and electrode lead bonded to the cover plate adopt the overlapping method of this invention. For example, when the capacitive screen is a GFF structure, such as... Figure 2 As shown, the capacitive screen consists of a glass cover layer, a first OCA adhesive layer, an RX conductive layer, a second OCA adhesive layer, and a TX conductive layer from top to bottom. The conductive electrodes and electrode leads of the RX conductive layer adopt the overlapping pattern and overlapping method of the present invention. There are no restrictions on the TX conductive layer, thereby obtaining the high-reliability nano-silver capacitive screen of the present invention.

[0048] Example 1

[0049] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer is provided with multiple sets of sensing electrodes and multiple sets of electrode leads, such as... Figure 4 As shown, each set of sensing electrodes is triangularly overlapped with a set of electrode leads. Each set of electrode leads includes an overlap portion, a connecting portion, and a routing portion connected in sequence. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes a triangular overlap pattern. The width of each triangular overlap pattern is 1.5 mm and the height is 1.0 mm. The width of each connecting portion is 2.5 mm and the height is 0.1 mm.

[0050] Example 2

[0051] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer is provided with multiple sets of sensing electrodes and multiple sets of electrode leads. Each set of sensing electrodes is triangularly overlapped with a set of electrode leads. Each set of electrode leads includes an overlap portion, a connecting portion, and a routing portion connected in sequence. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes a triangular overlap pattern. The width of each triangular overlap pattern is 2.5 mm and the height is 1.8 mm. The width of each connecting portion is 2.5 mm and the height is 0.3 mm.

[0052] Example 3

[0053] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer is provided with multiple sets of sensing electrodes and multiple sets of electrode leads. Each set of sensing electrodes is triangularly overlapped with a set of electrode leads. Each set of electrode leads includes an overlap portion, a connecting portion, and a routing portion connected in sequence. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes a triangular overlap pattern. The width of each triangular overlap pattern is 3.0 mm and the height is 2.0 mm. The width of each connecting portion is 3.0 mm and the height is 0.5 mm.

[0054] Example 4

[0055] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer is provided with multiple sets of sensing electrodes and multiple sets of electrode leads, such as... Figure 5 As shown, each set of sensing electrodes is triangularly overlapped with a set of electrode leads. Each set of electrode leads includes an overlap portion, a connecting portion, and a routing portion connected in sequence. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes two mutually separate triangular overlap patterns. The width of each triangular overlap pattern is 1.0 mm, the height is 0.5 mm, and the distance between the two triangular overlap patterns is 0.8 mm. The width of each connecting portion is 2.8 mm, and the height is 0.2 mm.

[0056] Example 5

[0057] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. Multiple sets of sensing electrodes and multiple sets of electrode leads are disposed on the conductive layer. Each set of sensing electrodes is triangularly overlapped with a set of electrode leads. Each set of electrode leads includes a sequentially connected overlap portion, a connecting portion, and a routing portion. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes two mutually separate triangular overlap patterns. Each triangular overlap pattern has a width of 1.2 mm and a height of 0.8 mm, and the distance between the two triangular overlap patterns is 1.1 mm. Each connecting portion has a width of 3.5 mm and a height of 0.3 mm.

[0058] Example 6

[0059] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer has multiple sets of sensing electrodes and multiple sets of electrode leads. Each set of sensing electrodes is triangularly overlapped with a set of electrode leads. Each set of electrode leads includes a sequentially connected overlap portion, a connecting portion, and a routing portion. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes two mutually separate triangular overlap patterns. Each triangular overlap pattern has a width of 1.5 mm and a height of 1.0 mm, and the distance between the two triangular overlap patterns is 1.0 mm. Each connecting portion has a width of 4.0 mm and a height of 0.5 mm.

[0060] Comparative Example 1

[0061] This comparison model uses a conventional capacitive touchscreen, employing a rectangular overlap design. The specific capacitive touchscreen structure is as follows:

[0062] A nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer has multiple sets of sensing electrodes and multiple sets of electrode leads disposed thereon. Figure 6 As shown, each set of sensing electrodes is rectangularly overlapped with a set of electrode leads. Each set of electrode leads includes an overlap portion, a connecting portion, and a routing portion connected in sequence. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes a rectangular overlap pattern. The width of each rectangular overlap pattern is 4.417 mm and the height is 0.5 mm. The width of each connecting portion is 4.417 mm and the height is 1.34 mm.

[0063] Comparative Example 2

[0064] The capacitive touchscreen in this comparison uses a multi-triangle overlapping design. The specific capacitive touchscreen structure is as follows:

[0065] A high-reliability nano-silver capacitive touchscreen includes a substrate layer and a conductive layer. The conductive layer is provided with multiple sets of sensing electrodes and multiple sets of electrode leads, such as... Figure 7As shown, each set of sensing electrodes is connected to a set of electrode leads in a multi-triangular overlap. Each set of electrode leads includes an overlap portion, a connecting portion, and a routing portion connected in sequence. Each overlap portion overlaps with the corresponding sensing electrode, and each overlap portion includes three mutually separate triangular overlap patterns. The width of each triangular overlap pattern is 1.0 mm and the height is 0.5 mm. The distance between any two triangular overlap patterns is 0.5 mm. The width of each connecting portion is 4.0 mm and the height is 0.2 mm.

[0066] The nano-silver capacitive screens of Examples 1-6 and Comparative Examples 1-2 were subjected to a dual 85% reliability test. The test steps were as follows: aging was carried out under conditions of 85℃ / 85%RH, and the failure time and failure location were measured. The test results are recorded in Table 1.

[0067] Table 1

[0068]

[0069] Note: A Rawdata value below 25000 will cause broken lines when writing with a capacitive pen, and a value below 20000 will cause broken lines when writing with a finger.

[0070] As can be seen from the test results in Table 1, the present invention, by adjusting the sensing electrode and electrode lead of the conductive layer of the capacitive screen to adopt a triangular overlapping method, controls the overlapping part pattern of the electrode lead to be triangular and limits its size, which can not only ensure the normal conduction of the sensing electrode and the electrode lead, but also greatly reduce the contact area and overlapping perimeter of the two, thereby greatly reducing the risk of water vapor erosion. The resulting capacitive screen can maintain its effectiveness for more than 800 hours in the dual 85 reliability test, and the reliability is greatly improved.

[0071] Comparing Examples 1-6 of this application with Comparative Example 1, Comparative Example 1 is a conventional rectangular overlapping capacitor screen. The contact area between the sensing electrode and the electrode lead is large, making it susceptible to moisture erosion. In the dual 85 reliability test, it only lasted 400 hours before the nano-silver at the overlapping point failed, resulting in an open circuit, indicating poor stability.

[0072] Comparing Examples 1-6 and Comparative Example 2 of this application, Examples 1-3 use a single triangle overlap, Examples 4-6 use a double triangle overlap, and Comparative Example 2 uses a multi-triangle overlap. The test results show that the reliability and writing stability of the capacitive screen using a double triangle overlap are greater than those using a single triangle overlap, which in turn are greater than those using a multi-triangle overlap. Furthermore, when a multi-triangle overlap is used (three triangle overlap patterns in Comparative Example 2), the stability of the capacitive screen actually deteriorates due to the further increase in contact area and overlap perimeter.

[0073] In summary, the nano-silver capacitive screen improved by this invention, by changing the overlapping method of the sensing electrode and the electrode lead, and by limiting the size of the overlapping pattern, greatly reduces the risk of moisture erosion at the overlapping point of the nano-silver, thereby significantly extending the service life of the capacitive screen and demonstrating good application value.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A high-reliability nano-silver capacitive touchscreen, characterized in that, The capacitive screen includes a substrate layer and a conductive layer. The conductive layer is provided with a sensing electrode and an electrode lead. The electrode lead and the sensing electrode are connected by a triangular overlap. The electrode lead includes an overlapping portion, a connecting portion, and a routing portion connected in sequence. The overlapping portion overlaps with the sensing electrode, and the overlapping portion includes two mutually separate triangular overlapping patterns. The width of the triangular overlapping pattern is 1.0-1.5mm, and the height is 0.5-1.0mm; the height of the connecting part is 0.1-0.5mm. The width of the triangular overlapping pattern gradually decreases in the direction towards the inside of the capacitive screen window to reduce moisture accumulation.

2. The high-reliability nano-silver capacitive touchscreen according to claim 1, characterized in that, The substrate layer is a glass cover plate.

3. The high-reliability nano-silver capacitive screen according to claim 1, characterized in that, The sensing electrode is a nano-silver electrode, and the electrode leads are silver paste leads.

4. The high-reliability nano-silver capacitive screen according to claim 1, characterized in that, The sensing electrode includes an RX electrode and / or a TX electrode.

5. A high-reliability nano-silver capacitive touchscreen according to claim 1, characterized in that, The capacitive screen includes either the GFF structure or the GF2 structure.

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