A method for manufacturing a panel of a capacitive touch screen and a manufactured panel

Abstract

The application discloses a manufacturing method of a capacitive touch screen panel, which comprises the following steps: 1) preparing an existing panel; 2) manufacturing an intermediate panel, setting a transparent annular electrode on the ITO film of the existing panel to surround the single units and the blank area, setting a horizontal electrode between two adjacent rows of single units, setting a vertical electrode between two adjacent columns of electrodes, and connecting the horizontal electrode and the vertical electrode to form a grid, and the end of the horizontal electrode and the end of the vertical electrode are connected to the annular electrode; the tail end of each transparent electrode on each single unit is extended and connected to the corresponding horizontal electrode or vertical electrode or annular electrode; 3) processing; and 4) manufacturing a final panel, after processing, tearing off the protective film, and cutting off the extended section of the transparent electrode connected between the single unit and the annular electrode. The panel has the advantages that static electricity can be eliminated when the protective film is torn off in the manufacturing process, and damage of the transparent electrode caused by static electricity is avoided.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a fabrication board for a capacitive touchscreen and the fabrication board itself. Background Technology

[0002] Projected capacitive touchscreens, as a simple and convenient human-computer interaction method, have been widely used in various aspects of daily life, such as mobile phones, watches, tablets, smart speakers, monitors, home appliances, medical equipment, and so on.

[0003] Capacitive touchscreens are classified into film structure capacitive touchscreens and glass structure capacitive touchscreens based on the material of their sensing sheets. Among them, film structure capacitive touchscreens have become the mainstream technology in the market due to their advantages such as light weight, thinness, and resistance to heavy impacts.

[0004] However, because the substrate of a membrane-structured capacitive touchscreen is thin and flexible, its transparent circuitry is more susceptible to damage during processing compared to glass-structured products. Therefore, a protective film must be applied to both sides during processing. The protective film on the printed side must be removed before each processing step, and a new protective film must be applied after each step. Furthermore, the protective films used are not anti-static. Anti-static protective films would create capacitance between themselves and the functional circuitry of the capacitive touchscreen, leading to inaccurate electrical performance monitoring and testing during production. Each time the protective film is removed, a certain amount of static electricity is generated, which has a certain probability of damaging or breaking the transparent electrodes of the touchscreen. Summary of the Invention

[0005] To address the problem of static electricity generated by the frequent removal of protective films during the manufacturing process of membrane-structured capacitive touchscreens, which can damage or break the transparent electrodes of the touchscreen, this invention relates to a method for manufacturing a substrate for a capacitive touchscreen and the substrate itself.

[0006] The method for manufacturing the substrate of the capacitive touch screen according to the present invention includes the following steps:

[0007] 1) Prepare an existing fabrication board, which includes an ITO film, a number of monomers arranged in rows and columns on the ITO film, and a blank area on the outside of the monomers on the ITO film. Each monomer includes a number of transparent electrodes arranged in the same direction.

[0008] 2) Fabrication of the intermediate fabric plate: A transparent annular electrode is set on the ITO film of the existing fabric plate in step 1) to surround the monomers and blank areas. A transverse electrode is set between two adjacent rows of monomers, and a longitudinal electrode is set between two adjacent columns of electrodes. The transverse and longitudinal electrodes intersect and connect to form a grid. The outermost ends of the transverse and longitudinal electrodes are connected to the annular electrode. Each intermediate fabric plate has four blank areas, distributed on both sides of the intermediate fabric plate and facing each other in pairs. The blank areas are long strips and parallel to the transparent electrodes of the monomers. The tail ends of the transparent electrodes on each monomer are extended. Among them, the monomers located on the outermost side and having an annular electrode in the direction of the extension of the tail end of the transparent electrode have their transparent electrode tail ends extended and connected to the aforementioned annular electrode. The transparent electrodes of the other monomers are extended at their tail ends and connected to the adjacent transverse or longitudinal electrode, thus obtaining the intermediate fabric plate.

[0009] 3) Processing: Cover the intermediate fabric obtained in step 2) with a protective film and perform subsequent processing. In each subsequent process where the protective film needs to be removed, use two metal clamps with grounding wires to clamp the ITO film and the ring electrode together before removing the film. Then remove the protective film, eliminate static electricity, remove the clamps and completely remove the protective film. After the process is completed, cover with a new protective film.

[0010] 4) Make the final fabrication board. After processing in step 3), peel off the protective film and cut off the extension of the transparent electrode connecting the monomer and the ring electrode to obtain the final board.

[0011] To ensure effective static elimination, in step 2), the annular electrode is rectangular, and its width is at least 4 mm. The upper limit of the annular electrode width is determined by the fixed width of the ITO film; given the limited width of the ITO film, the wider the annular electrode, the better.

[0012] To ensure effective destatication, in step 2), the width of both the transverse and longitudinal electrodes must be at least 1 mm. The upper limit of the width of the transverse and longitudinal electrodes is determined by the distance between the monomers.

[0013] For ease of operation, the cutting in step 4) is performed using laser cutting.

[0014] The present invention also provides a substrate for a capacitive touch screen, which is manufactured using the above-described method for manufacturing a substrate for a capacitive touch screen.

[0015] Beneficial effects: The manufacturing method of this invention first produces an intermediate fabric plate, which has annular electrodes, transverse electrodes, and longitudinal electrodes. The transparent electrodes of the individual units are extended to form a conductive circuit with the corresponding electrodes. This allows all static electricity generated during the removal of the protective film during processing to be discharged, ensuring that the transparent electrodes are protected from static damage. Finally, a step is added to cut off the extended section of the transparent electrodes, thus completing the fabrication of the fabric plate. By setting the annular electrode to a rectangular shape with a width of at least 4 mm, and the transverse and longitudinal electrodes to a width of at least 1 mm, the static electricity removal effect is ensured. Laser cutting is used for cutting, facilitating operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the existing fabric board structure;

[0017] Figure 2 This is a schematic diagram of the structure of the intermediate fabric plate;

[0018] Figure 3 This is a schematic diagram of the structure of the intermediate fabric plate;

[0019] Figure 4 This is a schematic diagram of the structure of the fabric plate of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the fabric plate of the present invention;

[0021] In the figure, 1 is the ITO film; 2 is the monomer; 21 is the transparent electrode; 3 is the blank area; 4 is the ring electrode; 5 is the transverse electrode; 6 is the longitudinal electrode; and 7 is the etched line. Detailed Implementation

[0022] The technical solution of the present invention will be described in detail below through embodiments, but the scope of protection of the present invention is not limited to the embodiments described.

[0023] A substrate for a capacitive touchscreen is manufactured by a method comprising the following steps.

[0024] 1) Prepare an existing PCB layout. The existing PCB layout includes an ITO film, several monomers arranged in rows and columns on the ITO film, and blank areas located outside the monomers on the ITO film. Each monomer includes several transparent electrodes arranged in the same direction. The structure of the existing PCB layout is as follows: Figure 1 As shown, the individual components are arranged in 2 rows and 3 columns, with each component spaced 1-2 mm apart. The blank areas are mainly used to place test blocks during the printing process. In the existing fabrication process, static electricity may be generated each time the protective film is peeled off, potentially damaging the circuitry.

[0025] 2) Make the intermediate fabric board, such as Figure 2-3As shown, in step 1), a transparent ring electrode 4 is retained on the existing fabric plate ITO film 1 to surround the monomer 2 and the blank area 3. The ring electrode 4 is rectangular and has a width of 4mm. A horizontal electrode 5 with a width of 1mm is retained between two adjacent rows of monomers 2, and a vertical electrode 6 with a width of 1mm is retained between two adjacent columns of electrodes. The horizontal electrode 5 and the vertical electrode 6 intersect and connect to form a grid. The outermost ends of the horizontal electrode 5 and the vertical electrode 6 are connected to the ring electrode 4. In this way, the entire transparent circuit can be conducted. Figure 2 and Figure 3 The extension directions of the transparent electrode 21 are different.

[0026] Each intermediate fabric plate has four blank areas 3, which are distributed on both sides of the intermediate fabric plate and are opposite to each other. The blank areas 3 are long strips and are parallel to the transparent electrode 21 of the monomer 2.

[0027] The tail ends of the transparent electrodes 21 on each unit 2 are extended (the specific direction of extension is determined by the contact position of the touch screen metal leads, and the extension direction is opposite to the bonding direction of the flexible circuit board (FPC)). Among them, the unit 2 located on the outermost side and having a ring electrode 4 in the extension direction of the tail end of the transparent electrode 21 has its tail end extended and connected to the aforementioned ring electrode 4. The transparent electrodes 21 of the other units 2 are extended and connected to the adjacent horizontal electrode 5 or vertical electrode 6, thus obtaining the intermediate board. The structure of the intermediate board is as follows: Figure 2-3 As shown.

[0028] 3) Processing: Cover the intermediate fabric plate obtained in step 2) with a protective film and proceed with subsequent processing. In each subsequent process where the protective film needs to be removed, before removal, use two metal clamps with grounding wires to hold the ITO film 1 and the annular electrode 4 (e.g., select...) Figure 2 or Figure 3 The two black dots in the middle are used as fixing points. They are clamped together and then the protective film is peeled off. This can discharge the static electricity generated when peeling the film, thus effectively solving the problem of static electricity damaging the transparent electrode. After eliminating static electricity, the clamp is removed and the protective film is completely removed. After the process is completed, a new protective film is applied.

[0029] 4) Fabricating the final PCB: After processing in step 3), remove the protective film and use laser cutting to cut the extended section of the transparent electrode 21 connecting the monomer 2 and the annular electrode 4 to form the etching line 7. Existing technology can be used for this laser cutting. The structure of the final PCB is as follows: Figure 4-5 As shown.

[0030] Unless otherwise specified, all technologies mentioned above refer to existing technologies.

[0031] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for manufacturing a substrate for a capacitive touchscreen, characterized in that, Includes the following steps: 1) Prepare an existing fabrication board, the existing fabrication board including ITO film material, a number of monomers arranged in rows and columns on the ITO film material, and a blank area located outside the monomers on the ITO film material, each monomer including a number of transparent electrodes arranged in the same direction; 2) Fabrication of the intermediate fabrication plate: A transparent annular electrode is set on the ITO film of the existing fabrication plate in step 1) to surround the monomers and blank areas. A transverse electrode is set between two adjacent rows of monomers, and a longitudinal electrode is set between two adjacent columns of electrodes. The transverse and longitudinal electrodes intersect and connect to form a grid. The outermost ends of the transverse and longitudinal electrodes are connected to the annular electrode. Each intermediate fabrication plate has four blank areas, distributed on both sides of the intermediate fabrication plate and facing each other in pairs. The blank areas are long strips and parallel to the transparent electrodes of the monomers. The tail ends of the transparent electrodes on each monomer are extended. Among them, the monomers located on the outermost side and having an annular electrode in the direction of the extension of the tail end of the transparent electrode have their transparent electrode tail ends extended and connected to the annular electrode. The transparent electrodes of the other monomers are extended at their tail ends and connected to the adjacent transverse or longitudinal electrode, thus obtaining the intermediate fabrication plate. 3) Processing: Cover the intermediate fabric obtained in step 2) with a protective film and perform subsequent processing. In each subsequent process where the protective film needs to be removed, use two metal clamps with grounding wires to clamp the ITO film and the ring electrode together before removing the film. Then remove the protective film, eliminate static electricity, remove the clamps and completely remove the protective film. After the process is completed, cover with a new protective film. 4) Make the final fabrication board. After processing in step 3), peel off the protective film and cut off the extension of the transparent electrode connecting the monomer and the ring electrode to obtain the final board.

2. The method for manufacturing the layout board of the capacitive touch screen according to claim 1, characterized in that, In step 2), the ring electrode is rectangular and the width of the ring electrode is at least 4 mm.

3. The method for manufacturing the layout board of the capacitive touch screen according to claim 1, characterized in that, In step 2), the width of the transverse electrode and the longitudinal electrode is at least 1 mm.

4. The method for manufacturing the layout board of the capacitive touch screen according to claim 1, characterized in that, In step 4), the cutting is performed using laser cutting.

5. A layout board for a capacitive touchscreen, characterized in that, It is manufactured using the method for manufacturing the fabrication board of the capacitive touch screen according to any one of claims 1-4.

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