Conductive film, metal mesh touch screen sensor and touch module

Abstract

The utility model discloses an embodiment proposes a kind of conductive film, metal grid touch screen sensor and touch module. To solve the problem that the conductive film is easily broken due to multiple bending in the prior art. The conductive film includes substrate, first metal conductive layer and first outer dark layer. The substrate has a first surface and a second surface arranged opposite along its thickness direction. The first metal conductive layer includes multiple layers of first conductive sub-layers, which are sequentially stacked on the first surface of the substrate. The thickness of each first conductive sub-layer is less than a first predetermined value, and the number of first conductive sub-layers is greater than a second predetermined value. The first outer dark layer is stacked on the outermost first conductive sub-layer. The conductive film of the utility model embodiment has good anti-breaking capability and high visual quality.

Description

Technical Field

[0001] This utility model relates to the field of conductive film technology, specifically to a conductive film and a metal mesh touch screen sensor and touch module having the conductive film. Background Technology

[0002] The surface of the touch module is covered with a conductive film containing a metallic conductive material. When a conductive object (finger) touches the conductive film, the surface capacitance at the point of contact changes under the influence of the human body's current, thus allowing the position of the touch point to be detected. Due to its fast response speed, high accuracy, and good display effect, it is increasingly favored by users. However, when used in bendable products, the conductive film may break after repeated bending over a period of time, causing screen damage. Utility Model Content

[0003] In view of this, the present invention aims to provide a solution for enabling mobile devices to incorporate conductive films, metal mesh touchscreen sensors, and touch modules, thereby addressing the problem in the prior art where conductive films are prone to breakage after repeated bending due to their poor bending resistance.

[0004] This invention provides a conductive film.

[0005] This invention also provides a metal mesh touchscreen sensor.

[0006] This utility model also provides a touch module.

[0007] The inventors discovered that excessive thickness of the conductive layer in a conductive film can easily cause the conductive film to break. The conductive film comprises a substrate, a first metallic conductive layer, and a first outer darkening layer.

[0008] The substrate has a first surface and a second surface disposed opposite to each other along its thickness direction; the first metal conductive layer includes multiple layers of first conductive layers, the multiple layers of first conductive layers are sequentially stacked on the first surface of the substrate, the thickness of the first metal conductive layer is 480nm to 1500nm, the thickness of each layer of the first conductive layer is less than a first preset value, and the number of layers of the first conductive layer is greater than a second preset value; the first outer darkening layer is stacked on the outermost layer of the first conductive layer.

[0009] The conductive film of this embodiment of the invention is made by dividing the first metal conductive layer into multiple layers of first conductive layers, and making the thickness of each first conductive layer less than a preset value, which is equivalent to thinning the conductive film. In other words, the multi-layered and thinned first conductive layers can disperse stress while ensuring a certain mechanical strength, reducing fatigue damage to the first conductive layers during repeated bending, thereby improving the flexibility and fracture resistance of the entire conductive film. As a result, the service life of the display screen with this conductive film is extended.

[0010] Furthermore, the first conductive layer, which is less than a preset thickness, can reduce the reflection and absorption of light when passing through the conductive film, thereby improving the overall light transmittance of the conductive film. Higher light transmittance means a clearer and brighter display effect. Moreover, the multi-layered first metallic conductive layer can reduce or eliminate moiré patterns by adjusting the refractive index and thickness of each layer, thus improving the visual quality of the display screen with this conductive film.

[0011] The conductive film of this invention has the advantages of good resistance to breakage and high visual quality.

[0012] In one embodiment, the thickness of the first conductive layer is 80 nm to 150 nm.

[0013] In one embodiment, the number of layers in the first conductive layer is 6 to 10.

[0014] In one embodiment, the first conductive layer is one of a copper layer, a zinc layer, and an aluminum layer.

[0015] In some embodiments, the thickness of the plurality of first conductive layers is set to be equal or decreasing from the inside to the outside along the thickness direction of the substrate.

[0016] In some embodiments, the thickness of the first outer darkening layer is less than the thickness of the first conductive layer.

[0017] In some embodiments, the thickness of the first outer darkening layer is 20 μm to 100 μm;

[0018] In some embodiments, the first outer darkening layer is a composite structure of metal oxide and metal oxide sub-oxide.

[0019] In some embodiments, the substrate is one of polyimide film, polycarbonate film, polyethylene terephthalate film, polyester film, polymethyl methacrylate film, and epoxy film.

[0020] In some embodiments, the thickness of the substrate is 30 μm to 50 μm.

[0021] In some embodiments, the conductive film further includes a first inner darkening layer disposed between the substrate and the innermost first conductive layer.

[0022] In some embodiments, the conductive film further includes a second metal conductive layer and a second outer darkening layer, wherein the second outer darkening layer and the second metal conductive layer are stacked on the second surface of the substrate.

[0023] In some embodiments, the second metal conductive layer includes multiple layers of second conductive layers, which are sequentially stacked on the second surface of the substrate. The thickness of the second conductive layer is greater than or equal to the thickness of the first conductive layer, and the second outer darkening layer is stacked on the outermost second conductive layer.

[0024] In some embodiments, the second conductive layer is 80nm to 300nm.

[0025] In some embodiments, the conductive film further includes a second inner darkening layer disposed between the substrate and the innermost second conductive layer.

[0026] The metal mesh touchscreen sensor of this utility model embodiment includes a conductive film according to any one of the above-described embodiments.

[0027] The touch module of this utility model embodiment includes the metal mesh touch screen sensor as described above. Attached Figure Description

[0028] Figure 1 This is a diagram showing the layered layout of the conductive film according to one embodiment of the present invention.

[0029] Figure 2 This is a diagram showing the stacking arrangement of the conductive film according to another embodiment of the present invention.

[0030] Figure 3 This is a diagram showing the layered layout of the conductive film according to another embodiment of this utility model.

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

[0032] substrate1;

[0033] First conductive layer 2;

[0034] First outer darkening layer 3;

[0035] First inner darkening layer 4;

[0036] Second conductive layer 5;

[0037] Second outer darkening layer 6;

[0038] Second inner darkening layer 7. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] The following is for reference. Figures 1-3 The conductive film, metal mesh touch screen sensor, and touch module of this utility model are described by way of example.

[0041] The conductive film of this utility model embodiment includes a substrate 1, a first metal conductive layer and a first outer darkening layer 3.

[0042] Substrate 1 along its thickness direction (e.g.) Figure 1 The vertical direction shown has a first face that is relatively set (e.g., the vertical direction shown). Figure 1 The upper surface of substrate 1 shown) and the second surface (as shown) Figure 1 The lower end face of the substrate 1 shown in the figure), the first metal conductive layer includes multiple first conductive layers 2, which are sequentially stacked on the first surface of the substrate 1. The thickness of each first conductive layer 2 is less than a first preset value, and the number of first conductive layers 2 is greater than a second preset value; the first outer darkening layer 3 is stacked on the outermost first conductive layer 2 (e.g., the lower end face of the substrate 1 shown in the figure), the first metal conductive layer includes multiple first conductive layers 2, which are sequentially stacked on the first surface of the substrate 1. Figure 1 The topmost first conductive layer 2) shown in the diagram.

[0043] The conductive film of this embodiment divides the first metal conductive layer into multiple first conductive layers 2, and sets the thickness of each first conductive layer 2 to be less than a preset value. This effectively thins the conductive film. In other words, the multi-layered and thinned first conductive layers 2, while maintaining a certain mechanical strength, can also disperse stress and reduce fatigue damage during repeated bending, thus improving the overall flexibility and fracture resistance of the conductive film. Consequently, the service life of the display screen with this conductive film is extended (more than double the bending life of existing metal mesh touchscreen sensors).

[0044] Furthermore, the first conductive layer 2, which is less than the preset thickness, reduces the reflection and absorption of light when passing through the conductive film, thereby improving the overall light transmittance. Higher light transmittance means a clearer and brighter display effect. Moreover, the multi-layered first metallic conductive layer can reduce or eliminate moiré patterns (interference fringes) by adjusting the refractive index and thickness of each layer, thereby improving the visual quality of the display screen with this conductive film.

[0045] The conductive film of this invention has the advantages of good resistance to breakage and high visual quality.

[0046] The thickness of the first metallic conductive layer is 480 nm to 1500 nm.

[0047] The conductive film of this embodiment, by limiting the thickness range of the first conductive metal layer, avoids problems such as cracks or breaks in the first conductive metal layer caused by excessive thickness. Furthermore, excessive thickness of the first conductive metal layer can cause it to absorb and reflect more light, resulting in decreased light transmittance and color shift, leading to poor clarity and color distortion. Therefore, the conductive film of this embodiment, by controlling the thickness of the first conductive metal layer within a reasonable range, has the advantages of further improving its resistance to breakage and enhancing visual quality.

[0048] On the other hand, the conductive film of this embodiment also avoids the problem of the first metal conductive layer being too thin, which would result in low mechanical strength and easy damage during installation or use. Furthermore, the first metal conductive layer is more prone to fatigue damage under repeated bending or stress, shortening its service life. Additionally, while a thin metal conductive layer helps improve light transmittance, if the thickness is too small, it cannot effectively shield external electromagnetic interference, also affecting display quality. Therefore, the conductive film of this embodiment, by controlling the first metal conductive layer within a reasonable thickness range, has the advantages of further improving its resistance to breakage and enhancing visual quality.

[0049] Optionally, the thickness of the first metallic conductive layer is 480nm, 485nm, 498nm, 500nm, 510nm, 515nm, 520nm, 530nm, 535nm, 550nm, 560nm, 569nm, 581nm, 590nm, 612nm, 620nm, 629nm, 635nm, 640nm, 647nm, 656nm, 667nm, 680nm, 700nm, 710nm, 715nm, 720nm, 730nm, 740nm, 750nm, 760nm, 770nm, or 810nm. 815nm, 820nm, 830nm, 840nm, 850nm, 860nm, 870nm, 900nm, 910nm, 915nm, 920nm, 930nm, 935nm, 950nm, 960nm, 969nm, 981nm, 990n m, 1000nm, 1010nm, 1020nm, 1050nm, 1100nm, 1120nm, 1150nm, 1200nm, 1250nm, 1330nm, 1400nm, 1420nm, 1450nm, 1480nm, 1500nm.

[0050] The thickness of the first conductive layer 2 is 80nm to 150nm (in related technologies, for example, the thickness of the first conductive layer can be 300nm).

[0051] The conductive film of this embodiment, by limiting the thickness range of the first conductive layer 2, avoids excessive thickness of a single layer of the first conductive layer 2, as an excessively thick first conductive layer 2 is more prone to cracking or breakage, affecting the service life and reliability of the device. Furthermore, it further avoids the problems of reduced light transmittance and color shift due to the metal conductive layer absorbing and reflecting more light if the first conductive layer 2 is too thick, resulting in poor clarity and color distortion. Therefore, the conductive film of this embodiment, by controlling the thickness of the first conductive layer 2 within a reasonable range, has the advantages of further improving its resistance to breakage and enhancing visual quality.

[0052] On the other hand, while a thinner first conductive layer 2 helps improve light transmittance, if the thickness of the first conductive layer 2 is too small, it cannot effectively shield against external electromagnetic interference, which can affect display quality. Moreover, an excessively thin first conductive layer 2 has lower mechanical strength and is easily damaged during installation or use, especially in applications requiring high durability (such as industrial displays), thus shortening its lifespan.

[0053] Optionally, the thickness of the first conductive layer 2 can be 80nm, 84nm, 89nm, 95nm, 100nm, 105nm, 113nm, 120nm, 122nm, 125nm, 128nm, 130nm, 133nm, 135nm, 138nm, 140nm, 142nm, 145nm, 147nm, and 150nm.

[0054] Furthermore, the first conductive layer 2 has 6 to 10 layers.

[0055] The conductive film of this embodiment, by limiting the number of the first conductive layer 2, avoids an increase in the total thickness of the first metal conductive layer due to an excessive number of the first conductive layer 2, which would lead to more light absorption and reflection, thereby reducing the overall light transmittance and affecting the display effect. Too many layers of the first conductive layer 2 would make the conductive film thick and rigid, making it more prone to delamination or breakage. Therefore, the conductive film of this embodiment, by controlling the number of the first conductive layer 2 within a reasonable range, has the advantages of further improving its resistance to breakage and enhancing visual quality.

[0056] On the other hand, an insufficient number of layers in the first conductive layer 2 will result in insufficient overall mechanical strength of the conductive film. At the same time, it is also more prone to fatigue damage under repeated bending or stress, thus shortening the overall lifespan of the display screen.

[0057] Optionally, the first conductive layer 2 can have 6, 7, 8, 9, or 10 layers. For example, Figure 1 As shown, the first conductive layer 2 can have 6 layers.

[0058] Optionally, the thickness of the first conductive layer 2 is 80nm to 150nm, and the number of layers in the first conductive layer 2 is 6 to 10. Furthermore, by rationally selecting and controlling the number of layers and the thickness of the first conductive layer 2, the advantages of good fracture resistance and improved visual quality are further enhanced.

[0059] The first conductive layer 2 is one of a copper layer, a zinc layer, or an aluminum layer. Therefore, by controlling the material of the first conductive layer 2, both fracture resistance and material cost of the conductive film can be reduced.

[0060] At a vacuum degree of 10 -3 ~10 -6 Under the condition of Pa, in the first metal conductive layer forming process, multiple first conductive layers 2 and pre-blackening treatment layers are sequentially stacked by controlling the sputtering power to be 2500W~3100W (in related technologies, the sputtering power is generally 5500W). In a mixture of nitrogen and oxygen, wherein the volume ratio of nitrogen to oxygen is controlled to be 40:1, the pre-blackening treatment layer is oxidized to form the first outer darkening layer 3.

[0061] The conductive film of this embodiment, by limiting the sputtering power to a range of 2500W to 3100W, can ensure high conductivity while maintaining the preset thickness of the first conductive layer 2 and reducing interface scattering effects through precise control of the sputtering power. Furthermore, this sputtering power provides a more uniform deposition rate, improving the thickness consistency of the first conductive layer 2 and avoiding problems such as uneven current distribution and localized overheating caused by unevenness in the first conductive layer 2. Therefore, the conductive film of this embodiment, by controlling the sputtering power within a reasonable range, has the advantage of improving the uniformity of the first conductive layer 2. In addition, low-power sputtering allows for better control of the film growth process at the atomic level, resulting in a denser structure, reduced porosity, and improved mechanical strength and corrosion resistance of the film.

[0062] In a mixture of nitrogen and oxygen in a volume ratio of 40:1, the pre-blackening layer is oxidized to form the first outer darkening layer 3.

[0063] In a mixture of nitrogen and oxygen, the pre-blackened layer is oxidized to form the first outer darkening layer 3.

[0064] In this embodiment of the conductive film, during the formation of the first outer darkening layer 3, nitrogen is used to replace part of the oxygen, i.e., nitrogen is incorporated into the oxygen. This alters the stable chemical bond structure in the darkening layer, thereby adjusting its absorption characteristics for specific wavelengths of light and reducing surface reflectivity. This allows the darkening layer to achieve higher absorption rates over a wider spectral range. Simultaneously, the incorporated nitrogen can introduce additional free electrons or holes, increasing the carrier density of the darkening layer and forming a more uniform and continuous conductive network, thus improving its conductivity.

[0065] Furthermore, nitrogen atoms are smaller than oxygen atoms, making them easier to embed into the material's crystal lattice, forming more stable chemical bonds and promoting inter-atomic diffusion at the interface, resulting in a tighter transition region. This structural change enhances the hardness and wear resistance of the darkening layer, extending its service life and fatigue strength.

[0066] The first outer darkening layer 3 of the conductive film in this embodiment can also be generated in a mixture of argon and oxygen in a volume ratio of 4:1.

[0067] In some embodiments, the thickness of the plurality of first conductive layers 2 is set to decrease from the inside to the outside along the thickness direction of the substrate 1.

[0068] For example, the thickness of the plurality of first conductive layers 2 is set to be gradually reduced from the inside to the outside along the thickness direction of the substrate 1 in the manner of 5nm, 6nm, 7nm or 9nm.

[0069] This invention is not limited to this embodiment. In other embodiments, the thickness of the plurality of first conductive layers 2 is set at a uniform thickness from the inside to the outside along the thickness direction of the substrate 1. Therefore, the uniform thickness of the first conductive layers 2 has the advantage of high processing convenience.

[0070] The thickness of the first outer darkening layer 3 is less than the thickness of the first conductive layer 2, and the thickness of the first outer darkening layer 3 is 20nm to 60nm.

[0071] Experiments show that the outermost first conductive metal layer is most prone to breakage. In this embodiment of the invention, the conductive film, by having multiple first conductive layers 2 with decreasing thicknesses along the thickness direction of the substrate 1 from the inside out, can further improve the flexibility and bending resistance of the conductive film while ensuring a certain level of mechanical strength, thereby further reducing fatigue damage to the outermost first conductive layer 2 during repeated bending. This extends the service life of the display screen with this conductive film.

[0072] In this embodiment of the conductive film, by controlling the thickness of the first outer darkening layer 3 to be less than the thickness of the first conductive layer 2, the thinner darkening layer can better bond with the adjacent first conductive layer 2, while maintaining a constant overall thickness of the conductive film. This facilitates inter-atomic diffusion at the interface, forming stronger interfacial adhesion and reducing the risk of darkening layer delamination or peeling. Thus, the overall integrity of the conductive film is improved. Furthermore, the relatively thin darkening layer in the touch module results in less light absorption and reflection, allowing more light to pass through the entire conductive film, thereby further enhancing the display brightness and clarity of the touch module. Therefore, the conductive film of this embodiment improves the structural integrity and display effect of the resulting touch module.

[0073] Furthermore, by limiting the thickness range of the first outer darkening layer 3, the color shift caused by different wavelengths of light undergoing different degrees of refraction, reflection, and absorption when passing through the material can be reduced, thereby reducing color difference and further improving the display effect.

[0074] Optionally, the thickness of the first outer darkening layer 3 is 20nm, 22nm, 25nm, 28nm, 30nm, 33nm, 35nm, 38nm, 40nm, 42nm, 45nm, 47nm, 50nm, 53nm, 55nm, 57nm, 58nm and 60nm.

[0075] The first outer darkening layer 3 is a composite structure of metal oxide and metal oxide sub-oxide.

[0076] For example, the oxide layer includes a composite structure of CuO and Cu2O. The relatively stable crystal structures of CuO and Cu2O provide high hardness and wear resistance. This property helps prevent failure of the darkening layer due to friction or wear, especially in dynamic environments. Simultaneously, the composite structure formed by CuO and Cu2O better resists fatigue damage under repeated stress, extending service life. The heterojunction interface between CuO and Cu2O can form an effective carrier transport channel, reducing resistance caused by interface defects and further improving conductivity.

[0077] The substrate 1 can be one of the following: polyimide film, polycarbonate film, polyethylene terephthalate film, polyester plastic film, polymethyl methacrylate film, and epoxy plastic film. Further, the substrate 1 is a modified polyimide film; this material and thickness of the substrate 1 improves folding resistance and surface flatness.

[0078] In some embodiments, the thickness of substrate 1 can be 20 μm to 100 μm, and further, the thickness of substrate 1 can be 30 μm to 50 μm.

[0079] The conductive film of this embodiment controls the thickness of the substrate 1 to avoid the problems associated with thicker substrates, which are typically harder and more prone to cracking or breakage during repeated bending, thus affecting the lifespan and reliability of the equipment. Conversely, an excessively thin substrate 1 has lower mechanical strength and is easily damaged during installation or use, prone to warping or other deformations, affecting the performance of the final product.

[0080] Optionally, the thickness of the substrate 1 can be 30μm, 32μm, 33μm, 35μm, 38μm, 40μm, 42μm, 44μm, 46μm and 50μm.

[0081] like Figure 2 As shown, the conductive film in this embodiment of the present invention further includes a first inner darkening layer 4, which is disposed between the substrate 1 and the innermost first conductive layer 2 along the thickness direction of the conductive film.

[0082] The conductive film of this embodiment features a first inner darkening layer 4 disposed along its thickness between the substrate 1 and the innermost first conductive layer 2. Because the first inner darkening layer 4 typically has high absorptivity and low reflectivity, it forms an effective anti-reflective interface between the substrate 1 and the first conductive layer 2, reducing light reflection loss and thus improving overall light transmittance. This enhances the contrast of the display device, resulting in clearer and more vibrant images. Furthermore, the first inner darkening layer 4 provides a more uniform transition area between the substrate 1 and the metal conductive layer, helping to achieve a more uniform current distribution, preventing localized overheating, and extending the device's lifespan. Therefore, the conductive film of this embodiment offers advantages in improving the display effect and extending the lifespan of the manufactured touch module.

[0083] like Figures 1 to 3 As shown, the conductive film in this embodiment of the present invention further includes a second metal conductive layer and a second outer darkening layer 6, which are stacked on the second surface of the substrate 1.

[0084] The conductive film of this embodiment, by providing a second metal conductive layer on the second surface of the substrate 1, and by providing metal conductive layers on both sides of the substrate 1, enables bidirectional current transmission, allowing current to enter or exit from either side of the device, increasing design flexibility and application versatility. The double-sided metal conductive layers help achieve a more uniform current distribution, avoiding localized overheating caused by current concentration in a certain area, and extending the device's service life. Furthermore, providing metal conductive layers on both sides of the substrate 1 significantly improves the mechanical strength of the entire component, thereby enhancing its bending resistance and durability, and further reducing the risk of breakage.

[0085] Optionally, the thickness of the second conductive layer 5 is 80 nm to 300 nm.

[0086] For example, the thickness of the second conductive layer 5 can be 80nm, 82nm, 85nm, 88nm, 90nm, 92nm, 95nm, 98nm, 100nm, 102nm, 105nm, 108nm, 110nm, 112nm, 115nm, 118nm, 120nm, 122nm, 125nm, 128nm, 130nm, 133nm, 135nm, 138nm, 140nm, 142nm, 145nm, 147nm, 150nm, 160nm, 170nm, 180nm, 190nm, 200nm, 210nm, 220nm, 230nm, 240nm, 250nm, 260nm, 270nm, 280nm, 290nm, or 300nm.

[0087] like Figures 1 to 3 As shown, the conductive film in this embodiment of the present invention further includes a second inner darkening layer 7, which is disposed between the substrate 1 and the innermost second conductive layer 5. Similarly, this prevents cracking or damage caused by excessive local stress, thereby improving the reliability of the entire conductive film structure.

[0088] Optionally, the first metal conductive layer is a copper layer structure, the substrate 1 is a high-temperature resistant polyester film (PET film), and the first outer dark layer 3, the first inner dark layer 4, the second outer dark layer 6 and the second inner dark layer 7 can all be a composite structure of CuO and Cu2O after the copper layer is oxidized.

[0089] The thicknesses of the first inner darkening layer 4, the first outer darkening layer 3, the second outer darkening layer 6, and the second inner darkening layer 7 can be set to be the same.

[0090] The metal mesh touchscreen sensor of this embodiment includes a conductive film according to any one of the above claims. The metal mesh touchscreen sensor of this embodiment has the advantages of resistance to breakage and improved visual quality.

[0091] Optionally, the sheet resistance of the metal mesh touchscreen sensor obtained in this way is 0.08ΩSq~0.15Ω / Sq.

[0092] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0093] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0096] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0097] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A conductive film, characterized in that, include A substrate having a first surface and a second surface disposed opposite to each other along its thickness direction; The first metal conductive layer includes multiple layers of first conductive layers, which are sequentially stacked on the first surface of the substrate. The thickness of the first metal conductive layer is 480nm to 1500nm, the thickness of each first conductive layer is less than a first preset value, and the number of first conductive layers is greater than a second preset value. The first outer darkening layer is stacked on the outermost first conductive layer.

2. The conductive film according to claim 1, characterized in that, The thickness of the first conductive layer is 80 nm to 150 nm; And / or, the number of layers in the first conductive layer is 6 to 10; And / or, the first conductive layer is one of a copper layer, a zinc layer, and an aluminum layer.

3. The conductive film according to claim 1, characterized in that, The thickness of the plurality of first conductive layers is set to be equal or decreasing from the inside to the outside along the thickness direction of the substrate.

4. The conductive film according to claim 1, characterized in that, The thickness of the first outer darkening layer is less than the thickness of the first conductive layer; And / or, the thickness of the first outer darkening layer is 20nm to 60nm.

5. The conductive film according to claim 1, characterized in that, The substrate is one of the following: polyimide film, polycarbonate film, polyethylene terephthalate film, polyester film, polymethyl methacrylate film, and epoxy film; And / or, the thickness of the substrate is 30 μm to 50 μm; And / or, it further includes a first inner darkening layer disposed between the substrate and the innermost first conductive layer.

6. The conductive film according to claim 1, characterized in that, It also includes a second metal conductive layer and a second outer darkening layer, the second outer darkening layer and the second metal conductive layer being sequentially stacked on the second surface of the substrate.

7. The conductive film according to claim 6, characterized in that, The second metal conductive layer includes multiple layers of second conductive layers, which are sequentially stacked on the second surface of the substrate. The thickness of the second conductive layer is greater than or equal to the thickness of the first conductive layer, and the second outer darkening layer is stacked on the outermost second conductive layer.

8. The conductive film according to claim 7, characterized in that, The second conductive layer is 80nm-300nm; And / or, it further includes a second inner darkening layer disposed between the substrate and the innermost second conductive layer.

9. A metal mesh touchscreen sensor, characterized in that, Includes the conductive film according to any one of claims 1-8.

10. A touch module, characterized in that, Includes the metal mesh touchscreen sensor as described in claim 9.

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