A multi-stage nanometer metal network touch module and a preparation method thereof

Abstract

The application provides a multi-stage nanometer metal network touch module and a preparation method thereof, which comprises a substrate and a touch function layer, wherein the touch function layer comprises, in sequence, a first touch electrode, an insulating layer and a second touch electrode on the first surface of the substrate, the first touch electrode and the second touch electrode both adopt a multi-stage nanometer metal network, and the multi-stage nanometer metal network comprises a connection channel and a node channel; the optical absorption rate of the node channel is less than that of the connection channel. Through the jumper bridging technology and the special design of the first node channel and the second node channel, the dot-shaped appearance formed by the traditional jumper bridging is effectively avoided, and the single-face F2 structure touch module formed can ensure smooth current transmission of the touch screen electrode, and improve the sensitivity and accuracy of touch. This is of great significance for improving the user experience, and can effectively improve the display definition while being super-light and super-thin.

Description

Technical Field

[0001] This invention relates to the field of touch display modules, specifically to a multi-level nano-metal network touch module and its preparation method, which has the advantages of being ultra-light, ultra-thin, and cost-effective. Background Technology

[0002] With the advancement of technology, touchscreen technology has been widely applied, especially in smartphones, smart homes, automotive touch displays, smart offices, smart healthcare, and education. Ultra-light and ultra-thin touchscreens have become a common development trend in human-computer interaction devices.

[0003] Chinese patent application CN202010222751.3 discloses a "touch module, touch display screen, and manufacturing method of touch display screen". The touch module includes: a touch layer, which is a single-layer structure and includes n columns of touch units. Each column of touch units includes a first unit and a second unit. The first unit includes a column of first electrodes and m first electrode traces. The first electrode column includes m first electrodes. Each first electrode trace is connected to one of the first electrodes to form m first signal lines. The second unit includes a column of second electrodes and j second electrode traces. The second electrode column includes m groups of second electrode units. The m groups of second electrode units are arranged one-to-one with the m first electrodes. Each group of second electrode units includes j second electrodes. Each second electrode trace is connected to one of the second electrodes in each group of second electrode units to form j second signal lines.

[0004] Chinese patent application CN201922418313.X discloses a "touch module and touch display device", which provides a touch module to solve the technical problem that there is a significant color difference between the display area and the bezel area when the screen is off, resulting in poor appearance consistency.

[0005] Traditional single-sided F2 structure touch screens are manufactured using conventional jumper bridging methods, which are difficult to produce. Due to the multi-layer structure at the jumper bridging location, visible dot-like appearances are easily formed. The multi-level nano-metal network touch module proposed in this application, due to the low haze, high transmittance, and high definition optical properties of the multi-level nano-metal network itself, and the special design of the first and second node channels, forms a single-sided F2 structure touch module that is ultra-light and ultra-thin, while effectively improving display clarity. Summary of the Invention

[0006] The purpose of this application is to provide a multi-level nano-metal network touch module and its fabrication method. Through jumper bridging technology, smooth current transmission through the touch screen electrodes can be ensured, improving touch sensitivity and accuracy. This is significant for enhancing user experience. Furthermore, with only one substrate layer, it offers the advantages of being ultra-light and ultra-thin while effectively avoiding the dot-like appearance formed by traditional jumper bridging, thus significantly improving display vividness.

[0007] This invention provides a multi-level nano-metal network touch module. The multi-level nano-metal network has the characteristics of low haze, high light transmittance and high clarity. The single-sided F2 structure touch module formed by the multi-level nano-metal network is ultra-light and ultra-thin, and can effectively improve display clarity.

[0008] To achieve the above-mentioned objectives, this application provides a multi-level nano-metal network touch module, comprising:

[0009] The substrate, which is a flexible or rigid substrate, includes a first surface and a second surface; and

[0010] The touch function layer includes, in sequence:

[0011] A first touch electrode located on the first surface of the substrate, the first touch electrode adopts a multi-level nano-metal network, including a first connection channel and a first node channel, the first connection channel and the first node channel being spaced apart;

[0012] An insulating layer, located above the first node channel, completely or partially covering the first node channel; and

[0013] The second touch electrode employs a multi-level nano-metal network, including a second connection channel and a second node channel. The second connection channel is located on the same layer as the first touch electrode. The second node channel is located on the upper side of the insulating layer, and its width is less than or equal to the width of the insulating layer. It is completely non-contacting with the first node channel and the first connection channel, and is electrically insulated. The second node channel is in contact with the second connection channel, thus forming the second touch electrode.

[0014] The optical absorptivity of the first node channel and the second node channel is less than that of the first connection channel or the second connection channel.

[0015] As an improvement to the above technical solution, the transmittance of the first connection channel is equal to the transmittance of the second connection channel.

[0016] As an improvement to the above technical solution, the light transmittance of the first node channel is the power of 1 / 2 of the light transmittance of the first connecting channel; the light transmittance of the second node channel is the power of 1 / 2 of the light transmittance of the second connecting channel, which can eliminate the visual dot-like appearance formed when nodes overlap due to the lower light transmittance at the nodes.

[0017] As an improvement to the above technical solution, the second surface of the substrate is provided with an anti-glare layer with a hardness greater than 1H.

[0018] As an improvement to the above technical solution, the substrate is a hardened substrate, and the hardening layer is located on the second surface of the substrate, with a hardness greater than 1H.

[0019] As an improvement to the above technical solution, the first connection channel and the second connection channel adopt a mesh shape; the first node channel and the second node channel adopt a wire grid shape and are arranged vertically, the line width of the wire grid of the first node channel is equal to the line width of the multi-level nano-metal network of the first connection channel in the direction of the first touch electrode; the line width of the wire grid of the second node channel is equal to the line width of the multi-level nano-metal network of the second connection channel in the direction of the second touch electrode.

[0020] As an improvement to the above technical solution, the first connection channel, the second connection channel, the first node channel, and the second node channel all adopt a mesh shape. The linewidth of the multi-level nano-metal network in the first connection channel is greater than the linewidth of the multi-level nano-metal network in the first node channel; the linewidth of the multi-level nano-metal network in the second connection channel is greater than the linewidth of the multi-level nano-metal network in the second node channel.

[0021] As an improvement to the above technical solution, the first connection channel, the second connection channel, the first node channel, and the second node channel all adopt a mesh shape. The line density of the multi-level nano-metal network in the first connection channel is greater than that in the first node channel; the line density of the multi-level nano-metal network in the second connection channel is greater than that in the second node channel.

[0022] This application also provides a method for preparing the multi-level nano-metal network touch module according to claims 1-8, the steps of which include:

[0023] a) Etching a pattern on the surface of a transparent conductive film of metal nanowires to form a second connection channel between the first touch electrode and the second touch electrode;

[0024] b) An insulating layer is prepared on the upper side of the first node channel of the first touch electrode, so that it completely covers the first node channel of the first touch electrode in the direction of the second touch electrode, while not completely covering the second connection channel of the second touch electrode.

[0025] c) Fabricate a second node channel for the second touch electrode above the insulating layer.

[0026] As an improvement to the above technical solution, the etching method for the etched pattern includes: laser etching, photolithography, and / or wet etching.

[0027] As an improvement to the above technical solution, it also includes the preparation of the edges of the first touch electrode and the second touch electrode, including: integral etching of a low-resistivity film material, etching the edges of the first touch electrode and the second touch electrode simultaneously with etching the first touch electrode and the second connection channel; screen printing silver paste, and etching the edges by additional screen printing silver paste; or

[0028] Inkjet printing of edges: Edges are formed by printing conductive ink using inkjet printing.

[0029] In practical applications, the multi-level nano-metal network states used in the first node channel of the first touch electrode and the second node channel of the second touch electrode can be arbitrarily combined. For example, a combination of a multi-level nano-metal network grid state and a narrow-linewidth multi-level nano-metal network mesh state, or a combination of a multi-level nano-metal network grid state and a low-density multi-level nano-metal network mesh state, or a combination of a narrow-linewidth multi-level nano-metal network mesh state and a low-density multi-level nano-metal network mesh state.

[0030] In practical applications, the multi-level nano-metal network state adopted by the first node channel and the second node channel can be of various styles. For example, it can be a wireframe state with narrow linewidth and low multi-level nano-metal network mesh density, or a wireframe state with wide linewidth and low multi-level nano-metal network mesh density, or a wireframe state with narrow linewidth and high multi-level nano-metal network mesh density, or a non-periodic wireframe state with varying linewidth and mesh density, or a grid state with narrow linewidth and low multi-level nano-metal network mesh density, or a grid state with wide linewidth and low multi-level nano-metal network mesh density, or a grid state with narrow linewidth and high multi-level nano-metal network mesh density, or a non-periodic grid state with varying linewidth and mesh density, etc. The multi-level nano-metal network state adopted by the first node channel of the first touch electrode and the second node channel of the second touch electrode can be arbitrarily combined from the above states.

[0031] The multi-level nano-metal network has a linewidth of 3-50 μm, a line spacing of 60-1000 μm, and a duty cycle of 45-96%. The conductive channel width of the first and second touch electrodes is 0.05-15 mm, and there is an insulating region between two adjacent conductive channels with a width of 0.1-10 mm.

[0032] The substrate is an anti-glare substrate, and the anti-glare layer is located on the second surface of the substrate, with a hardness greater than 1H.

[0033] The substrate is a hardened substrate, and the hardening layer is located on the second surface of the substrate, with a hardness greater than 1H.

[0034] The substrate is an anti-glare substrate or a hardened substrate. The second surface is a high-hardness surface. When the second surface is placed on the outer surface, it can be used directly as a cover plate without the need for an additional cover plate.

[0035] The flexible substrate material includes one of polyester (PET), polypropylene (PP), triacetate cellulose (TAC), cyclic olefin polymer (COP), colorless polyimide (CPI), and polyethylene (PE). Optionally, it includes a post-processed substrate. The post-processing methods include, but are not limited to, one or more of anti-reflective treatment, anti-reflective treatment, hardening treatment, and anti-glare treatment. The thickness of the substrate is 10-300 μm.

[0036] The multi-level nano-metal network touch module also includes a cover plate and an adhesive for bonding the cover plate and the substrate.

[0037] The multi-level nano-metal network has the characteristics of low haze, high light transmittance, and high clarity, which can effectively avoid the reflection and scattering of light emitted from the display module and improve display clarity.

[0038] The method for preparing the insulating layer involves forming a transparent insulating layer on the film surface of the first touch electrode and the second connection channel of the second touch electrode by sputtering, evaporation, coating, etc., and then further coating it with photoresist, followed by exposure and development treatment, and then etching away the part to be removed by solution etching, retaining the part above the first node channel of the first touch electrode, and peeling off and removing the photoresist material by ion reaction or other mechanical means.

[0039] The method for preparing the second node channel of the second touch electrode involves forming a conductive layer of the second node channel of the second touch electrode on the surface of the film layer on which an insulating layer has been formed by sputtering, evaporation, coating, etc., and then further coating it with photoresist, followed by exposure and development treatment, and then etching away the part that needs to be removed by solution etching, retaining the part above the first node channel of the first touch electrode, and peeling off and removing the photoresist material by ion reaction or other mechanical means.

[0040] The method for preparing the insulating layer and the second node channel of the second touch electrode involves aligning and preparing the insulating layer and the second node channel of the second touch electrode through precision inkjet printing, screen printing, brushing, or other methods.

[0041] The advantages of this application are as follows: The multi-level nano-metal network touch module and its fabrication method, through jumper bridging technology and a special design of the first and second node channels, effectively avoid the dot-like appearance formed by traditional jumper bridging. The resulting single-sided F2 structure touch module ensures smooth current transmission to the touch screen electrodes, improving touch sensitivity and accuracy. This is of great significance for enhancing the user experience, and while being ultra-light and ultra-thin, it can effectively improve display clarity. Attached Figure Description

[0042] In the accompanying drawings, the same reference numerals represent the same or similar components. For ease of understanding, some components in the drawings are infinitely enlarged. The specific shapes in the drawings are unrelated to the actual shapes of the components and are only for identification and explanation. Obviously, those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0043] Figure 1 This is a schematic diagram of the touch module structure described in this invention;

[0044] Figure 2a This is a schematic diagram of the first touch electrode 20 in one embodiment of the present invention; it includes a first touch electrode connection channel 201 and a first touch electrode node channel 202;

[0045] Figure 2b This is a schematic diagram of a pattern etched on the surface of a transparent conductive film of metal nanowires in one embodiment of the present invention to form a pattern for the first touch electrode 20 and the second touch electrode second connection channel 211.

[0046] Figure 2c This is a schematic diagram of the second touch electrode 21 in one embodiment of the present invention;

[0047] Figure 3a This is a schematic diagram of the first touch electrode 20′ in another embodiment of the present invention, which includes a first connection channel 201′ and a first node channel 202′ of the first touch electrode;

[0048] Figure 3b This is a schematic diagram of a pattern etched on the surface of a transparent conductive film of metal nanowires to form a first touch electrode 20′ and a second touch electrode second connection channel 211′, in another embodiment of the present invention.

[0049] Figure 3c This is a schematic diagram of the second touch electrode 21' in another embodiment of the present invention;

[0050] Figure 4a This is a schematic diagram of the first touch electrode 20″ in another embodiment of the present invention, which includes a first connection channel 201″ and a first node channel 202″ of the first touch electrode;

[0051] Figure 4b This is a schematic diagram of a pattern etched on the surface of a transparent conductive film of metal nanowires to form a first touch electrode 20″ and a second touch electrode second connection channel 211″, according to another embodiment of the present invention.

[0052] Figure 4c This is a schematic diagram of the second touch electrode 21″ in another embodiment of the present invention;

[0053] Figure 5 This is a cross-sectional schematic diagram of the touch functional layer pattern structure described in this invention from the perspective of the first touch electrode.

[0054] Figure 6 This is a cross-sectional schematic diagram of the touch functional layer pattern structure described in this invention from the perspective of the second touch electrode.

[0055] Figure 7 This is a schematic diagram of the fabrication process of the second touch electrode of the touch module according to the present invention. An insulating layer 22 is prepared on the surface of the first node channel 202 (202′ or 202″) of the first touch electrode, so that the insulating layer completely covers the first node channel 202 (202′ or 202″) of the first touch electrode in the direction of the second touch electrode, while not completely covering the second connection channel 211 (211′ or 211″) of the second touch electrode. Then, the second node channel 212 (212′ or 212″) of the second touch electrode is prepared on the surface of the insulating layer. The two sides of the second node channel 212 (212′ or 212″) of the second touch electrode are in contact with the second connection channel of the second touch electrode, while not in contact with the first connection channel of the first touch electrode or the first node channel of the first touch electrode.

[0056] Figure 8 This is a microscope image of the multi-level nano-metal network used in the first and second touch electrodes of this invention.

[0057] Figure label:

[0058] 00+ level nano-metal network touch module

[0059] 1 is the substrate, and 2 is the touch functional layer.

[0060] 20 (20′ or 20″) is the first touch electrode.

[0061] 201 (201′, 201″) is the first connection channel of the first touch electrode.

[0062] 202 (202′, 202″) is the first node channel of the first touch electrode.

[0063] 21 (21′, 21″) is the second touch electrode.

[0064] 211 (211′, 211″) is the second connection channel of the second touch electrode.

[0065] 212 (212′, 212″) is the second node channel of the second touch electrode.

[0066] 22 is the insulating layer Detailed Implementation

[0067] The following are examples of embodiments of the present invention. Those skilled in the art should understand that the listed embodiments are only some embodiments of the present invention and should not be regarded as specific limitations on the present invention.

[0068] Example 1

[0069] Figure 1 This is a schematic diagram of the structure of the multi-level nano-metal network touch module 00 of the present invention, including: a substrate 1 and a touch functional layer 2. A schematic diagram of the first touch electrode 20 is shown below. Figure 2a As shown, it includes a first touch electrode, a first connection channel 201, and a first node channel 202; Figure 2b This is a schematic diagram of the pattern etched on the surface of a transparent conductive film of metal nanowires to form the first touch electrode 20 and the second touch electrode second connection channel 211, as described in this invention. Figure 2c This is a schematic diagram of the second touch electrode 21 of the present invention.

[0070] A multi-level nano-metal network touch module includes:

[0071] Substrate 1: includes a flexible substrate and a rigid substrate, wherein the substrate includes a first surface and a second surface;

[0072] Touch function layer 2 includes:

[0073] First touch electrode: Located on the first surface of the substrate, the first touch electrode adopts a multi-level nano-metal network, including a first connection channel 201 and a first node channel 202, the first connection channel and the first node channel are spaced apart, the first connection channel adopts a multi-level nano-metal network mesh shape, the first node channel adopts a wire grid state for the multi-level nano-metal network, and the light transmittance of the first connection channel is less than that of the first node channel.

[0074] Insulation layer 22;

[0075] Second touch electrode 21: The second touch electrode includes a second connection channel 211 and a second node channel 212. The second touch electrode adopts a multi-level nano-metal network. The second connection channel of the second touch electrode is located on the same layer as the first touch electrode. The second connection channel of the second touch electrode adopts a multi-level nano-metal network grid state. The second node channel of the second touch electrode is located on the upper side of the insulating layer and adopts a multi-level nano-metal network grid state, completely covering the insulating layer in the direction of the second touch electrode and contacting the second connection channel of the second touch electrode to form the second touch electrode. The light transmittance of the second node channel of the second touch electrode is greater than that of the second connection channel of the second touch electrode. A microscopic image of the multi-level nano-metal network is shown below. Figure 8 As shown, it presents a grid pattern. Figure 8 The enlarged view on the right shows the microstructure of each grid line, which contains disordered metal nanowires. Both the first and second touch electrodes of this application employ a multi-level nano-metal network, and a special grid structure is designed in the first node channel of the first touch electrode and the second node channel of the second touch electrode.

[0076] The substrate serves as both the substrate and cover plate of the touch module. The multi-level nano-metal network touch module is characterized by its ultra-lightweight and ultra-thin design.

[0077] Preferably, the substrate is an anti-glare substrate, and the anti-glare layer is located on the second surface of the substrate, with a hardness greater than 1H.

[0078] Preferably, the substrate is a hardened substrate, and the hardening layer is located on the second surface of the substrate, having a hardness greater than 1H.

[0079] The multi-level nano-metal network features low haze, high transmittance, and high clarity, effectively preventing reflection and scattering of light emitted from the display module and improving display clarity. Simultaneously, both the first node channel of the first touch electrode and the second node channel of the second touch electrode employ a multi-level nano-metal network grid, eliminating the visual dot-like appearance caused by low transmittance when nodes overlap, further enhancing the visual effect.

[0080] Example 2

[0081] Figure 3a This is a schematic diagram of the first touch electrode 20′ in this embodiment, which includes a first connection channel 201′ and a first node channel 202′ of the first touch electrode; Figure 3b This is a schematic diagram of the pattern formed by etching a pattern on the surface of a transparent conductive film of metal nanowires to form a first touch electrode 20′ and a second touch electrode second connection channel 211′, as described in this invention. Figure 3c This is a schematic diagram of the second touch electrode 21' of the present invention.

[0082] A multi-level nano-metal network touch module includes:

[0083] Substrate: including flexible substrate and rigid substrate, wherein the substrate includes a first surface and a second surface;

[0084] The touch functionality layer includes:

[0085] First touch electrode 20′: The first touch electrode adopts a multi-level nano-metal network, including a first connection channel 201′ and a first node channel 202′. The first connection channel and the first node channel are spaced apart. The line width of the multi-level nano-metal network of the first connection channel is greater than the line width of the multi-level nano-metal network of the first node channel. The light transmittance of the first connection channel is less than the light transmittance of the first node channel.

[0086] Insulation layer 22;

[0087] The second touch electrode 21' includes a second connecting channel 211' and a second node channel 212'. The second touch electrode employs a multi-level nano-metal network. The linewidth of the multi-level nano-metal network in the second connecting channel is greater than the linewidth of the multi-level nano-metal network in the second node channel. The second connecting channel of the second touch electrode is located on the same layer as the first touch electrode. The second node channel of the second touch electrode is located on the upper side of the insulating layer, completely covering the insulating layer in the direction of the second touch electrode, and is in contact with the second connecting channel of the second touch electrode to form the second touch electrode. The light transmittance of the second node channel of the second touch electrode is greater than the light transmittance of the second connecting channel of the second touch electrode.

[0088] Microscopic images of the multi-level nano-metal network are shown below. Figure 8 As shown, it presents a grid pattern, with each grid line containing an interconnected network of metal nanowires.

[0089] The substrate serves as both the substrate and cover plate of the touch module. The multi-level nano-metal network touch module is characterized by its ultra-lightweight and ultra-thin design.

[0090] Preferably, the substrate is an anti-glare substrate, and the anti-glare layer is located on the second surface of the substrate, with a hardness greater than 1H.

[0091] Preferably, the substrate is a hardened substrate, and the hardening layer is located on the second surface of the substrate, having a hardness greater than 1H.

[0092] The multi-level nano-metal network has the characteristics of low haze, high light transmittance, and high clarity, which can effectively avoid the reflection and scattering of light emitted from the display module and improve display clarity.

[0093] Example 3

[0094] Figure 4a This is a schematic diagram of the first touch electrode 20″ in this embodiment, which includes a first connection channel 201″ and a first node channel 202″ of the first touch electrode; Figure 4b This is a schematic diagram of the pattern formed by etching a pattern on the surface of a transparent conductive film of metal nanowires to form a first touch electrode 20″ and a second connection channel 211″ for the second touch electrode, as described in this invention. Figure 4c This is a schematic diagram of the second touch electrode 21″ of the present invention.

[0095] A multi-level nano-metal network touch module includes:

[0096] Substrate: including flexible substrate and rigid substrate, wherein the substrate includes a first surface and a second surface;

[0097] The touch functionality layer includes:

[0098] First touch electrode 20″: Located on the first surface of the substrate, the first touch electrode adopts a multi-level nano-metal network, including a first connection channel 201″ and a first node channel 202″, the first connection channel and the first node channel are spaced apart, the line density of the multi-level nano-metal network of the first connection channel is greater than the line density of the multi-level nano-metal network of the first node channel, the line width of the multi-level nano-metal network of the first connection channel is equal to the line width of the multi-level nano-metal network of the first node channel, and the light transmittance of the first connection channel is less than the light transmittance of the first node channel;

[0099] Insulation layer 22;

[0100] The second touch electrode 21″ includes a second connection channel 211″ and a second node channel 212″. The second touch electrode adopts a multi-level nano-metal network. The second connection channel and the second node channel are spaced apart. The line density of the multi-level nano-metal network in the second connection channel is greater than that in the second node channel. The line width of the multi-level nano-metal network in the second connection channel is equal to that in the second node channel. The second connection channel of the second touch electrode is located on the same layer as the first touch electrode. The second node channel of the second touch electrode is located on the upper side of the insulating layer, completely covering the insulating layer in the direction of the second touch electrode, and contacting the second connection channel of the second touch electrode to form the second touch electrode. The light transmittance of the second node channel of the second touch electrode is greater than that of the second connection channel of the second touch electrode.

[0101] The substrate serves as both the substrate and cover plate of the touch module. The multi-level nano-metal network touch module is characterized by its ultra-lightweight and ultra-thin design.

[0102] Preferably, the substrate is an anti-glare substrate, and the anti-glare layer is located on the second surface of the substrate, with a hardness greater than 1H.

[0103] Preferably, the substrate is a hardened substrate, and the hardening layer is located on the second surface of the substrate, having a hardness greater than 1H.

[0104] The multi-level nano-metal network has the characteristics of low haze, high light transmittance, and high clarity, which can effectively avoid the reflection and scattering of light emitted from the display module and improve display clarity.

[0105] Linewidth refers to the mesh linewidth of a multi-level nano-metal network, that is, the thickness of the mesh lines; linear density refers to the density of the mesh itself in a multi-level nano-metal network, that is, the spacing between the mesh lines.

[0106] Example 4

[0107] like Figure 5 The diagram shown is a cross-sectional view of the touch functional layer pattern structure of the present invention from the perspective of the first touch electrode, including a first touch electrode 20 (20′ or 20″), a first connection channel 201 (201′ or 201″) and a first node channel 202 (202′ or 202″) of the first touch electrode; a second node channel 212 (212′ or 212″) of the second touch electrode; and an insulating layer 22.

[0108] like Figure 6 The diagram shown is a cross-sectional view of the touch functional layer pattern structure of the present invention from the perspective of the second touch electrode, including a second touch electrode 21 (21′ or 21″), a second connection channel 211 (211′ or 211″) and a second node channel 212 (212′ or 212″) of the second touch electrode; a first node channel 202 (202′ or 202″) of the first touch electrode; and an insulating layer 22.

[0109] The touch functionality layer includes:

[0110] First touch electrode 20 (20′ or 20″): Located on the first surface of the substrate, the first touch electrode adopts a multi-level nano-metal network, including a first connection channel 201 (201′ or 201″) and a first node channel 202 (202′ or 202″), the first connection channel and the first node channel are spaced apart, the linewidth of the multi-level nano-metal network of the first connection channel is greater than the linewidth of the multi-level nano-metal network of the first node channel, and the light transmittance of the first connection channel is less than the light transmittance of the first node channel;

[0111] Insulating layer 22: The insulating layer 22 is located on the upper side of the first node channel 202 (202′ or 202″) of the first touch electrode, and completely or partially covers the first node channel of the first touch electrode, but does not completely cover the second connection channel of the second touch electrode;

[0112] The second touch electrode 21 (21′ or 21″): The second touch electrode includes a second connection channel 211 (211′ or 211″) and a second node channel 212 (212′ or 212″). The second touch electrode adopts a multi-level nano-metal network. The linewidth of the multi-level nano-metal network of the second connection channel is greater than the linewidth of the multi-level nano-metal network of the second node channel. The second connection channel of the second touch electrode is located on the same layer as the first touch electrode. The second node channel of the second touch electrode is located on the upper side of the insulating layer, completely covering the insulating layer in the direction of the second touch electrode, and contacting the second connection channel of the second touch electrode to form the second touch electrode. The light transmittance of the second node channel of the second touch electrode is greater than the light transmittance of the second connection channel of the second touch electrode.

[0113] like Figure 5 and Figure 6 As shown, the insulating layer 22 is located above the first node channel 202 (202′ or 202″) of the first touch electrode and completely covers the first node channel 202 (202′ or 202″) of the first touch electrode in the direction of the second touch electrode, while not completely covering the second connection channel 211 (211′ or 211″) of the second touch electrode. The second node channel 212 (212′ or 212″) of the second touch electrode is located above the insulating layer 22 and is in contact with the second connection channel 211 (211′ or 211″) of the second touch electrode, while not in contact with the first connection channel 201 (201′ or 201″) of the first touch electrode, and not in contact with the first node channel 202 (202′ or 202″) of the first touch electrode.

[0114] Example 5

[0115] A method for manufacturing a multi-level nano-metal network touch module, such as Figure 7 As shown, it includes:

[0116] a) Etching a pattern on the surface of a transparent conductive film of metal nanowires to form a second connection channel between the first touch electrode and the second touch electrode;

[0117] b) An insulating layer is prepared on the upper side of the first node channel of the first touch electrode, so that it completely covers the first node channel of the first touch electrode in the direction of the second touch electrode, while not completely covering the second connection channel of the second touch electrode.

[0118] c) Fabricate a second node channel for the second touch electrode above the insulating layer.

[0119] The etching methods for the etched patterns include laser etching, photolithography, and wet etching.

[0120] The method for preparing the insulating layer involves forming a transparent insulating layer on the film surface of the first touch electrode and the second touch electrode second connection channel by sputtering, evaporation, coating, etc., and then further coating it with photoresist, followed by exposure and development treatment, and then etching away the part that needs to be removed by solution etching, retaining the part above the first node channel of the first touch electrode, and peeling off and removing the photoresist material by ion reaction or other mechanical means.

[0121] The method for preparing the second node channel of the second touch electrode involves forming a conductive layer of the second node channel of the second touch electrode on the surface of the film layer on which an insulating layer has been formed by sputtering, evaporation, coating, etc., and then further coating it with photoresist, followed by exposure and development treatment, and then etching away the part that needs to be removed by solution etching, retaining the part above the first node channel of the first touch electrode, and peeling off and removing the photoresist material by ion reaction or other mechanical means.

[0122] The method for preparing the insulating layer and the second node channel of the second touch electrode involves aligning and preparing the insulating layer and the second node channel of the second touch electrode through precision inkjet printing, screen printing, spraying, brushing, or other methods.

[0123] The method also includes a method for manufacturing the edge lines of the first touch electrode and the second touch electrode, the method including: integral etching of low-resistivity film material, screen printing of silver paste, inkjet printing of edge lines, etc.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. A multi-level nano-metal network touch module, comprising: The substrate is a flexible substrate or a rigid substrate, and the substrate includes a first surface and a second surface; and Touch functionality layer; The touch function layer includes, in sequence: A first touch electrode located on the first surface of the substrate, the first touch electrode adopts a multi-level nano-metal network, including a first connection channel and a first node channel, the first connection channel and the first node channel being spaced apart; An insulating layer, wherein the insulating layer is located above the first node channel and completely or partially covers the first node channel; and The second touch electrode employs a multi-level nano-metal network, including a second connection channel and a second node channel. The second connection channel is located on the same layer as the first touch electrode. The second node channel is located on the upper side of the insulating layer, and its width is less than or equal to the width of the insulating layer. It is completely non-contacting with the first node channel and the first connection channel, and is electrically insulated. The second node channel is in contact with the second connection channel, thus forming the second touch electrode. The optical absorptivity of the first node channel and the second node channel is less than that of the first connection channel or the second connection channel.

2. The multi-level nano-metal network touch module according to claim 1, characterized in that, The transmittance of the first connection channel is equal to the transmittance of the second connection channel.

3. The multi-level nano-metal network touch module according to claim 1, characterized in that, The transmittance of the first node channel is the power of the transmittance of the first connecting channel; the transmittance of the second node channel is the power of the transmittance of the second connecting channel.

4. The multi-level nano-metal network touch module according to claim 1, characterized in that, The second surface of the substrate is provided with an anti-glare layer with a hardness greater than 1H.

5. The multi-level nano-metal network touch module according to claim 1, characterized in that, The substrate is a hardened substrate, and the hardening layer is located on the second surface of the substrate, with a hardness greater than 1H.

6. The multi-level nano-metal network touch module according to any one of claims 1 to 5, characterized in that, The first and second connection channels adopt a mesh shape; the first and second node channels adopt a wire grid shape and are arranged vertically; the line width of the wire grid of the first node channel is equal to the line width of the multi-level nano-metal network of the first connection channel in the direction of the first touch electrode. The linewidth of the second node channel grid is equal to the linewidth of the second connection channel in the direction of the multi-level nano-metal network of the second touch electrode.

7. The multi-level nano-metal network touch module according to any one of claims 1 to 5, characterized in that, The first connection channel, the second connection channel, the first node channel, and the second node channel all adopt a mesh shape, and the line width of the multi-level nano-metal network of the first connection channel is greater than the line width of the multi-level nano-metal network of the first node channel. The linewidth of the multi-level nano-metal network in the second connection channel is greater than the linewidth of the multi-level nano-metal network in the second node channel.

8. The multi-level nano-metal network touch module according to any one of claims 1 to 5, characterized in that, The first connection channel, the second connection channel, the first node channel and the second node channel all adopt a mesh shape, and the line density of the multi-level nano-metal network of the first connection channel is greater than the line density of the multi-level nano-metal network of the first node channel. The line density of the multi-level nano-metal network in the second connection channel is greater than that in the second node channel.

9. A method for preparing a multi-level nano-metal network touch module according to claims 1 to 8, comprising the following steps: a) Etching a pattern on the surface of a transparent conductive film of metal nanowires to form a second connection channel between the first touch electrode and the second touch electrode; b) An insulating layer is prepared on the upper side of the first node channel of the first touch electrode, so that it completely covers the first node channel of the first touch electrode in the direction of the second touch electrode, while not completely covering the second connection channel of the second touch electrode. c) Fabricate a second node channel for the second touch electrode above the insulating layer.

10. The method for preparing a multi-level nano-metal network touch module according to claim 9, characterized in that, The etching methods for the etched pattern include: laser etching, photolithography, and / or wet etching.

11. The method for preparing a multi-level nano-metal network touch module according to claim 9 or 10, characterized in that, It also includes the fabrication of the edges of the first and second touch electrodes, including: integral etching of a low-resistivity film, etching the edges of the first and second touch electrodes simultaneously with etching the first touch electrode and the second connection channel; screen printing silver paste, further screen printing silver paste and etching the edges; or Inkjet printing of edges: Edges are formed by printing conductive ink using inkjet printing.

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