Binding structure, binding method and waterproof test method of capacitive touch screen

Abstract

The invention belongs to the technical field of capacitive touch screens, and particularly discloses a binding structure, a binding method and a waterproof test method of a capacitive touch screen. The binding structure comprises an ITO film substrate, a cover plate, a silver paste circuit layer connected with the capacitive touch screen sensor, an insulating layer, a bonding layer, a first FPC covering film connected with the FPC, an FPC golden finger, a second FPC covering film and a conductive adhesive tape layer. The binding method comprises the steps of sequentially laminating the layers, adjusting the edge, filling glue, pressing and curing. The waterproof test method comprises the following steps: putting the bound product into a water tank, ensuring that the FPC component and the golden finger are not in contact with water, continuously electrifying for 700 hours, taking out for function test every day, and if all test items pass, determining that the product is qualified. According to the structure and the method, the stability and the waterproof performance of the touch screen are improved, and the product quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitive touch screens, and in particular to a binding structure, a binding method and a waterproof testing method of a capacitive touch screen. Background Art

[0002] With the rapid development of mobile technology, capacitive touch screens have been widely used in various mobile devices. Especially in entertainment venues such as bars, mobile terminals are important tools for service and management, and their stability and reliability are particularly important. However, such venues are often accompanied by the presence of liquids such as alcohol, and it is inevitable that alcohol will flow into the equipment during use, which poses a severe challenge to the waterproof performance of capacitive touch screens and the stability of the binding structure.

[0003] Capacitive touch screens usually use a glass or plastic surface covered with a conductive film to achieve touch operation by sensing the charge change on the touch surface. Although this design provides a good touch experience, it also makes the touch screen susceptible to interference from moisture, humidity or water droplets. In a humid environment such as a bar, once liquids such as alcohol penetrate into the device, especially in the binding area, it may cause a short circuit in the product or silver ion migration, resulting in a progressive short circuit, and ultimately making the product unable to work properly.

[0004] In addition, the use environment of capacitive touch screens is often complex and changeable, with a small binding area and limited conduction area, which makes it more difficult to ensure the waterproof performance and electrical insulation performance of the product. At the same time, the non-sealing of the binding environment also exacerbates this problem, making the product more susceptible to external environmental influences. This effect is particularly obvious in environments with heavy moisture, such as bars. The product is easily affected by the external environment, resulting in short circuits or slow migration of silver ions, which affects the normal operation and service life of the product.

[0005] Therefore, how to improve the waterproof performance of the capacitive touch screen and the stability of the binding structure has become a problem that needs to be solved urgently. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide the present invention in the field of X technology, in particular to a binding structure, binding method and waterproof testing method of a capacitive touch screen, which are used to solve the problems in the prior art...

[0007] To achieve the above-mentioned object and other related objects, the present invention provides a binding structure of a capacitive touch screen, comprising: ITO film substrate; A cover plate, arranged opposite to the ITO thin film substrate; The first component is connected to the capacitive touch screen sensor and is disposed between the ITO film substrate and the cover plate, and includes, from the ITO film substrate outward, the following components: A silver paste circuit layer is arranged on the ITO thin film substrate; An insulating layer, disposed on the silver paste circuit layer; An adhesive layer, disposed on the insulating layer and connected to the cover plate; The second component is connected to the FPC and is disposed between the ITO film substrate and the cover plate, and is stacked in sequence from the cover plate to the inside and includes: A first FPC covering film is disposed on the cover plate; FPC gold fingers, arranged on the first FPC covering film; A second FPC covering film is provided on a part of the FPC gold finger area; A conductive tape layer, one side of which is connected to a partial area of ​​the FPC gold finger not covered by the second FPC cover film, and the other side of which is connected to the silver paste circuit layer; two ends of the conductive tape layer are respectively connected to the second FPC cover film and the insulating layer.

[0008] Optionally, one end of the insulating layer covers the edge of the FPC gold finger along its length direction, and the covered lateral distance is no more than 0.1 mm.

[0009] Optionally, one end of the first FPC covering film extends outside the FPC gold finger and onto the insulating layer, and covers the insulating layer to a depth of 0.1-0.2 mm.

[0010] Optionally, a gap is formed between the first FPC covering film and the adhesive layer, the gap is located between the cover plate and the insulating layer, and 8008 anti-oxidation glue is arranged in the gap.

[0011] Optionally, a right-angle opening is formed between the second FPC cover film and the silver paste circuit layer, and a portion of the silver paste circuit layer is exposed on the right-angle opening, and the exposed portion is provided with ECS0601 glue.

[0012] In a second aspect, the present invention provides a capacitive touch screen binding method, which is applied to the above-mentioned capacitive touch screen binding structure, comprising: The silver paste circuit layer is laminated to the ITO film substrate, and then an insulating layer is evenly coated or laminated on the silver paste circuit layer, and then an adhesive layer is laminated on the insulating layer, ensuring that one side of the adhesive layer faces the direction of bonding with the cover plate; A first FPC cover film is attached to the cover plate, and then an FPC gold finger is placed on the first FPC cover film, and then a second FPC cover film is attached to a part of the FPC gold finger to protect the gold finger from external interference, while leaving a part of the gold finger uncovered by the second FPC cover film; Paste one side of the conductive tape layer to the part of the FPC gold finger that is not covered by the second FPC cover film, and align and paste the other side to the silver paste circuit layer to ensure good conductivity. At the same time, the two ends of the conductive tape layer are in close contact with the second FPC cover film and the edge of the insulating layer respectively; Adjust the edge of the insulating layer so that it covers the edge of the FPC gold finger along the length direction, and the lateral distance of the coverage is controlled to be no more than 0.1mm. Extend one end of the first FPC cover film appropriately beyond the edge of the FPC gold finger and cover it on the insulating layer. The coverage depth is controlled within the range of 0.1-0.2mm; The space formed between the first FPC cover film and the adhesive layer is filled with 8008 anti-oxidation glue to ensure structural stability and prevent oxidation; At the right angle formed between the second FPC cover film and the silver paste circuit layer, the exposed part of the silver paste circuit layer is filled with ECS0601 glue to enhance the structural sealing and electrical insulation; Use appropriate lamination equipment and process parameters to press the cover plate to the ITO film substrate to ensure that all layers are tightly bonded, and then perform heat curing to complete the binding of the FPC and the capacitive touch screen sensor.

[0013] Optionally, the adhesive layer is made of OCA optically transparent adhesive.

[0014] Optionally, the conductive tape layer is anisotropic conductive hot-melt tape.

[0015] In a third aspect, the present invention provides a capacitive touch screen waterproof testing method, which is applied to the binding structure of the capacitive touch screen, and comprises: Put the bound products into the water tank for waterproof test, ensuring that the FPC component area and the gold fingers of the outlet terminals are not exposed to water. During the test, the product was powered on by connecting the test board and kept powered on for 700 hours; Take the product out of the water once a day and use the test software to perform a functional test on the product. If all functional test items pass, the product is qualified.

[0016] Optionally, the functional test items include but are not limited to a touch screen sensitivity test, a response speed test, a touch accuracy test, a screen display stability test, an electrical insulation performance test and a sealing test.

[0017] As described above, the binding structure of a capacitive touch screen proposed by the present invention has the following beneficial effects: The present invention effectively prevents water penetration through a fine laminated structure and specific glue filling, ensuring that the capacitive touch screen can be completely placed in a water tank for a long-term waterproof test without damage, while ensuring that the FPC component area and the gold fingers of the outlet end are not exposed to water, greatly enhancing the waterproof performance of the product. The precise coverage of the insulating layer and the ingenious design of the conductive tape layer effectively isolate the direct contact between the silver paste circuit layer and other layers, preventing the migration of silver ions, thereby extending the service life of the product and improving the electrical insulation performance and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of a binding structure of a capacitive touch screen before binding according to an embodiment of the present invention; Figure 2 It is a schematic diagram showing a binding structure of a capacitive touch screen according to an embodiment of the present invention after binding; Figure 3 Shown is a schematic flow chart of a method for binding a capacitive touch screen according to an embodiment of the present invention; Figure 4 A test schematic diagram showing a waterproof test method for a capacitive touch screen according to an embodiment of the present invention; Description of reference numerals: ITO film substrate 10, silver paste circuit layer 11, insulating layer 12, adhesive layer 13, cover plate 20, first FPC cover film 21, FPC gold finger 22, second FPC cover film 23, conductive tape layer 24, 8008 anti-oxidation glue 25, ECS0601 glue 26, water tank 31, binding area 32, outlet terminal 33, test board 34, computer 35. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0020] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The type, quantity and ratio of each component during actual implementation can be a random change, and the component layout type may also be more complicated. The structure, ratio, size, etc. illustrated in the drawings of the present specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the present invention. The change or adjustment of its relative relationship should also be regarded as the scope of the present invention without substantially changing the technical content.

[0021] Example 1 A binding structure for a capacitive touch screen, such as Figure 1 and Figure 2 As shown, the structure includes an ITO thin film substrate 10, a cover plate 20, a first component connected to the capacitive touch screen sensor, and a second component connected to the FPC. These components and their connection relationships will be described in detail below.

[0022] The ITO film substrate 10 is the basis of the capacitive touch screen and has good conductivity and light transmittance. Other functional layers can be further arranged on the ITO film substrate 10 to construct a complete touch screen structure; the cover plate 20 is arranged opposite to the ITO film substrate 10 to protect the internal structure of the touch screen from the influence of the external environment. The cover plate 20 is made of glass, plastic or other transparent materials to ensure the light transmittance and appearance quality of the touch screen.

[0023] The first component is connected to the capacitive touch screen sensor and is arranged between the ITO film substrate 10 and the cover plate 20. From the ITO film substrate 10 to the outside, it includes a silver paste circuit layer 11, an insulating layer 12 and an adhesive layer 13. Among them, the silver paste circuit layer 11 is arranged on the ITO film substrate 10 to realize the conductive function of the touch screen. The silver paste circuit layer 11 is prepared on the ITO film substrate 10 by printing, coating or sputtering to form a required circuit pattern; the insulating layer 12 is arranged on the silver paste circuit layer 11 to isolate the silver paste circuit layer 11 from the external environment to prevent the performance of the touch screen from being affected by external interference. The insulating layer 12 is made of organic or inorganic materials, such as polyester, polyimide or silicon oxide; the adhesive layer 13 is arranged on the insulating layer 12 and connected to the cover plate 20. The adhesive layer 13 is used to tightly combine the cover plate 20 with the ITO film substrate 10 and the functional layers thereon to form a complete touch screen structure. The adhesive layer 13 is prepared by materials with high light transmittance and strong adhesion, such as OCA optical transparent glue.

[0024] The second component is connected to the FPC and is arranged between the ITO film substrate 10 and the cover plate 20. It includes a first FPC covering film, an FPC gold finger 22, a second FPC covering film and a conductive tape layer 24 stacked in sequence from the cover plate 20 to the inside. Among them, the first FPC covering film is arranged on the cover plate 20 to protect the FPC gold finger 22 and its connecting parts from the influence of the external environment. The first FPC covering film is made of flexible materials such as polyimide to ensure that it has good flexibility and durability; the FPC gold finger 22 is arranged on the first FPC covering film to realize the connection between the FPC and the internal circuit of the touch screen. The FPC gold finger 22 is made of gold-plated copper or aluminum to improve its conductivity and corrosion resistance; the second FPC covering film is arranged on a partial area of ​​the FPC gold finger 22 to further protect the FPC gold finger 22 from external interference. At the same time, a partial area of ​​the FPC gold finger 22 is left uncovered by the second FPC covering film so as to be connected to the conductive part inside the touch screen; the conductive One side of the electrical tape layer 24 is connected to a partial area of ​​the second FPC covering film that is not covered by the FPC gold finger 22, and the other side is connected to the silver paste circuit layer 11. The conductive tape layer 24 is used to realize the conductive connection between the FPC and the internal circuit of the touch screen and ensure the stability and reliability of the connection. The conductive tape layer 24 is made of materials with excellent conductive properties and thermal stability, such as anisotropic conductive hot-melt tape. The two ends of the conductive tape layer 24 are respectively connected to the second FPC covering film and the insulating layer 12, which not only realizes the electrical connection between the FPC gold finger 22 and the silver paste circuit layer 11, but also further improves the stability and reliability of the overall structure.

[0025] In addition, according to a preferred embodiment of the present invention, one end of the insulating layer 12 covers the edge of the FPC gold finger 22 along its length direction, and the lateral distance covered is no more than 0.1 mm, further preventing the external environment from interfering with the FPC gold finger 22, and improving the reliability and stability of the touch screen.

[0026] In a more preferred embodiment, one end of the first FPC cover film can also extend outside the FPC gold finger 22 and onto the insulating layer 12, and the depth of covering the insulating layer 12 is 0.1-0.2 mm. Specifically, when the first FPC cover film, the FPC gold finger 22, the second FPC cover film and the FPC as a whole are considered, their coverage depth on the insulating layer 12 is limited to no more than 0.3 mm. This design leaves no gap between the insulating layer 12 and the FPC gold finger 22, effectively resisting damage from the external environment, and further extending the overall service life of the touch screen.

[0027] A more optimized implementation detail is that a space is reserved between the first FPC cover film and the adhesive layer 13, the space is located between the cover plate 20 and the insulating layer 12, and is filled with 8008 anti-oxidation glue 25. This design not only ensures the stability of the touch screen structure, but also effectively prevents the occurrence of oxidation, thereby significantly improving the durability and reliability of the touch screen.

[0028] In addition, a right-angle opening is formed where the second FPC covering film is connected to the silver paste circuit layer 11. The end face portion of the silver paste circuit layer 11 is connected to the second FPC covering film, and the other portion is exposed on the right-angle opening. The exposed portion is coated with ECS0601 glue 26. The ECS0601 glue 26 has good fluidity and strong sealing, thereby ensuring the stability of the connection and overall performance.

[0029] Example 2 Reference Figure 1-Figure 3 As shown, the capacitive touch screen binding method provided by the present invention is applied to the binding structure of the above-mentioned capacitive touch screen, and includes the following steps: S1, laminating the silver paste circuit layer 11 onto the ITO thin film substrate 10, then uniformly coating or laminating the insulating layer 12 on the silver paste circuit layer 11, and then laminating the adhesive layer 13 on the insulating layer 12, ensuring that one side of the adhesive layer 13 faces the direction of bonding with the cover plate 20; S2, attaching a first FPC cover film to the cover plate 20, and then placing an FPC gold finger 22 on the first FPC cover film, and then attaching a second FPC cover film to a partial area of ​​the FPC gold finger 22 to protect the FPC gold finger 22 from external interference, while leaving a partial area of ​​the FPC gold finger 22 uncovered by the second FPC cover film; S3, stick one side of the conductive tape layer 24 to the partial area of ​​the second FPC cover film that is not covered by the FPC gold finger 22, and align and stick the other side to the silver paste circuit layer 11 to ensure good conductivity and achieve conductive connection between the FPC and the internal circuit of the touch screen. At the same time, the two ends of the conductive tape layer 24 are in close contact with the second FPC cover film and the edge of the insulating layer 12 respectively; S4, adjust the edge of the insulating layer 12 so that it covers the edge of the FPC gold finger 22 along the length direction, and the lateral distance of the coverage is controlled to be no more than 0.1mm, and one end of the first FPC cover film is appropriately extended beyond the edge of the FPC gold finger 22 and covers the insulating layer 12, and the coverage depth is controlled within the range of 0.1-0.2mm; S5, filling the space formed between the first FPC cover film and the adhesive layer 13 with 8008 anti-oxidation glue 25 to ensure structural stability and prevent oxidation; S6. Fill the exposed part of the silver paste circuit layer 11 with ECS0601 glue 26 at the right angle formed between the second FPC cover film and the silver paste circuit layer 11 to enhance the structural sealing and electrical insulation; S7. Use appropriate lamination equipment and process parameters to press the cover plate 20 and the ITO thin film substrate 10 to ensure that all layers are tightly bonded, and then perform heat curing treatment to complete the binding of the FPC and the capacitive touch screen sensor.

[0030] Specifically, due to the effects of the lamination equipment and process parameters, the conductive tape layer 24 will be subjected to a certain pressure, thereby undergoing a certain deformation, that is, reducing its volume, to ensure a good conductive connection between the silver paste circuit layer 11 and the FPC gold finger 22. Since the FPC gold finger 22 covers the edge of the insulating layer 12, the FPC gold finger 22 will contact the insulating layer 12 during the binding process. The FPC gold finger 22 will squeeze the insulating layer 12. The insulating layer 12 has a certain elasticity and plasticity to ensure close contact with the insulating layer 12. This close contact helps to reduce resistance and interference in the electrical connection and improve the performance of the touch screen.

[0031] The above-mentioned binding method based on the binding structure of the capacitive touch screen has significant beneficial effects, especially in terms of waterproofing and silver ion migration. Through fine interlayer structure design and rigorous binding process, such as using 8008 anti-oxidation glue 25 and ECS0601 glue 26 for filling, the sealing and electrical insulation of the structure are effectively enhanced, thereby greatly improving the waterproof performance of the touch screen, ensuring that stable electrical performance can be maintained in a humid environment. At the same time, the scheme effectively blocks the silver ion migration path in the silver paste circuit layer 11 by controlling the coverage and close contact of the insulating layer 12 to the FPC gold finger 22, reducing the risk of electrical performance degradation and touch screen failure caused by silver ion migration. In addition, the deformation treatment during the lamination process further ensures a good conductive connection between the conductive tape layer 24 and the silver paste circuit layer 11 and the FPC gold finger 22, thereby improving the overall performance and reliability of the touch screen. In summary, the binding scheme provides an effective solution to the problems of waterproofing and silver ion migration of capacitive touch screens.

[0032] Example 3 Reference Figure 4 As shown, the present invention also provides a waterproof testing method for a capacitive touch screen, and the method is applied to the binding structure of the above-mentioned capacitive touch screen.

[0033] Put the product's binding area into the water tank for waterproof test, ensuring that the FPC and FPC gold fingers are not exposed to water. During the test, the product is powered on by connecting the test board, which is connected to a computer and powered on for 700 hours. In this embodiment, the test board is connected to the output terminal of the product to transmit the test signal to the touch screen and receive the response signal of the touch screen. These signals include but are not limited to touch input signals, screen display signals, and electrical insulation performance detection signals.

[0034] Take the product out of water once a day and perform functional tests on the product using test software on a computer. If all functional test items pass, the product is qualified.

[0035] Functional test items include but are not limited to touch screen sensitivity test, response speed test, touch accuracy test, screen display stability test, electrical insulation performance test and sealing test, etc. Functional tests can comprehensively evaluate the performance of the product in the waterproof test and determine whether it is qualified.

[0036] Touch screen sensitivity test: Test the touch screen's response speed to touch input to ensure that the screen can accurately sense and respond to user touch, slide and other operations in a humid environment.

[0037] Response speed test: Measures the time difference from touch input to the corresponding change on the screen, and evaluates the instant response capability of the screen under waterproof conditions.

[0038] Touch accuracy test: Through a preset touch path or pattern, the touch screen is tested to see whether it can accurately identify and track the user's touch trajectory during the waterproof test.

[0039] Screen display stability test: Under continuous power supply and humid environment, observe whether the screen display is stable, without flickering, black screen or display abnormality.

[0040] Electrical insulation performance test: Use an insulation resistance tester to detect the insulation resistance between the internal circuit of the touch screen and the external environment to ensure that no electrical short circuit or leakage occurs during the waterproof test.

[0041] Sealing test: By observing or detecting whether water has penetrated into the touch screen during the waterproof test, the sealing performance of the touch screen is evaluated to see whether it meets the design requirements.

[0042] In summary, the provided waterproof test method can fully simulate the use of the product in an extremely humid environment by placing the entire product in a water tank for a long waterproof test, thereby comprehensively evaluating its waterproof performance. Through strict waterproof tests and comprehensive functional tests, products that do not meet performance standards can be screened out, thereby improving the overall product quality and reliability, and ensuring that the products ultimately delivered to consumers have excellent waterproof performance and stable performance.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A binding structure for a capacitive touch screen, characterized in that: include ITO film substrate; A cover plate, arranged opposite to the ITO thin film substrate; The first component is connected to the capacitive touch screen sensor and is disposed between the ITO film substrate and the cover plate, and includes, from the ITO film substrate outward, the following components: A silver paste circuit layer is arranged on the ITO thin film substrate; An insulating layer, disposed on the silver paste circuit layer; An adhesive layer, disposed on the insulating layer and connected to the cover plate; The second component is connected to the FPC and is disposed between the ITO film substrate and the cover plate, and is stacked in sequence from the cover plate to the inside and includes: A first FPC covering film is disposed on the cover plate; FPC gold fingers, arranged on the first FPC covering film; A second FPC covering film is provided on a part of the FPC gold finger area; A conductive tape layer, one side of which is connected to a partial area of ​​the FPC gold finger not covered by the second FPC cover film, and the other side of which is connected to the silver paste circuit layer; two ends of the conductive tape layer are respectively connected to the second FPC cover film and the insulating layer.

2. The binding structure of a capacitive touch screen according to claim 1, characterized in that: One end of the insulating layer covers the edge of the FPC gold finger along its length direction, and the lateral distance covered is no more than 0.1 mm.

3. The binding structure of a capacitive touch screen according to claim 2, characterized in that: One end of the first FPC covering film extends outside the FPC gold finger and onto the insulating layer, and covers the insulating layer to a depth of 0.1-0.2 mm.

4. The binding structure of a capacitive touch screen according to claim 1, characterized in that: A gap is formed between the first FPC covering film and the adhesive layer, and the gap is located between the cover plate and the insulating layer. 8008 anti-oxidation glue is arranged in the gap.

5. The binding structure of a capacitive touch screen according to claim 4, characterized in that: A right-angle opening is formed between the second FPC cover film and the silver paste circuit layer, and a portion of the silver paste circuit layer is exposed on the right-angle opening, and the exposed portion is provided with ECS0601 glue.

6. A capacitive touch screen binding method, applied to the capacitive touch screen binding structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: The silver paste circuit layer is laminated to the ITO film substrate, and then an insulating layer is evenly coated or laminated on the silver paste circuit layer, and then an adhesive layer is laminated on the insulating layer, ensuring that one side of the adhesive layer faces the direction of bonding with the cover plate; A first FPC cover film is attached to the cover plate, and then an FPC gold finger is placed on the first FPC cover film, and then a second FPC cover film is attached to a part of the FPC gold finger to protect the gold finger from external interference, while leaving a part of the gold finger uncovered by the second FPC cover film; Paste one side of the conductive tape layer to the part of the FPC gold finger that is not covered by the second FPC cover film, and align and paste the other side to the silver paste circuit layer to ensure good conductivity. At the same time, the two ends of the conductive tape layer are in close contact with the second FPC cover film and the edge of the insulating layer respectively; Adjust the edge of the insulating layer so that it covers the edge of the FPC gold finger along the length direction, and the lateral distance of the coverage is controlled to be no more than 0.1mm. Extend one end of the first FPC cover film appropriately beyond the edge of the FPC gold finger and cover it on the insulating layer. The coverage depth is controlled within the range of 0.1-0.2mm; The space formed between the first FPC cover film and the adhesive layer is filled with 8008 anti-oxidation glue to ensure structural stability and prevent oxidation; At the right angle formed between the second FPC cover film and the silver paste circuit layer, the exposed part of the silver paste circuit layer is filled with ECS0601 glue to enhance the structural sealing and electrical insulation; Use appropriate lamination equipment and process parameters to press the cover plate to the ITO film substrate to ensure that all layers are tightly bonded, and then perform heat curing to complete the binding of the FPC and the capacitive touch screen sensor.

7. A capacitive touch screen binding method according to claim 6, characterized in that: The adhesive layer is made of OCA optical transparent adhesive.

8. The method for binding a capacitive touch screen according to claim 6, characterized in that: The conductive tape layer is anisotropic conductive hot-melt tape.

9. A method for testing the waterproofness of a capacitive touch screen, applied to the binding structure of the capacitive touch screen according to any one of claims 1 to 5, characterized in that: include: Put the bound products into the water tank for waterproof test, ensuring that the FPC component area and the gold fingers of the outlet terminals are not exposed to water. During the test, the product was powered on by connecting the test board and kept powered on for 700 hours; Take the product out of the water once a day and use the test software to perform a functional test on the product. If all functional test items pass, the product is qualified.

10. A waterproof testing method for a capacitive touch screen according to claim 9, characterized in that: The functional test items include but are not limited to touch screen sensitivity test, response speed test, touch accuracy test, screen display stability test, electrical insulation performance test and sealing test.

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