Structure and preparation method of screen printing stencil, preparation apparatus, and display substrate

Abstract

This application provides a screen printing stencil structure and preparation method, preparation apparatus, and display substrate, which can be applied to the cover glass of mobile phone displays. By limiting the area occupied by the printed pattern and controlling the mesh size within the area occupied by the printed pattern, it ensures that the ink does not fluctuate drastically inside the area after the ink is filled, thereby reducing the occurrence of defects such as missing teeth, jagged edges, and white edges on the edge area of ​​the cover glass and improving the printing yield.

Description

Technical Field

[0001] This application relates to the field of glass-ceramic technology, and more specifically, to the structure and preparation method of screen printing stencils, preparation apparatus, and display substrates. Background Technology

[0002] Microcrystalline glass panels for mobile phones are among the most commonly used display substrates. They are typically located as the layer closest to the surface of the mobile phone display, protecting the internal components from damage. After the transparent glass processing is completed, black mask (BM) ink needs to be printed around the edges of the transparent glass, a process known as screen printing. However, the quality of the screen printing stencil often affects the BM ink during screen printing, causing defects such as jagged edges, serrations, and white edges on the transparent glass edges, resulting in a loss of printing yield. Summary of the Invention

[0003] This application provides a structure and preparation method of a screen printing stencil, a preparation apparatus, and a display substrate, which can effectively reduce the frequency of phenomena such as missing teeth, jagged edges, and white edges that occur during screen printing, thereby improving the printing yield.

[0004] In a first aspect, a screen printing stencil structure is provided, comprising: a mesh, the mesh including a first region and a second region, the second region surrounding the first region, the mesh corresponding to the first region interlacing to form a plurality of first mesh openings, the first mesh openings being filled with photosensitive emulsion, and the mesh corresponding to the second region interlacing with the boundary of the second region to form a plurality of second mesh openings, wherein the length of the mesh forming the second mesh openings is greater than the length of the boundary. The second width of the second mesh opening is 1 / 2 to 2 / 3 of the first width of the first mesh opening, the second width is the maximum vertical distance between the mesh forming the second mesh opening and the boundary, the first width is the aperture of the first mesh opening, and the line containing the first width is parallel to the line containing the second width.

[0005] Based on the above technical solution, by setting the second width of the second mesh to 1 / 2 to 2 / 3 of the first width of the first mesh, the ink at the junction of the second and first regions can be cleared in time when the second region is filled with ink, avoiding the accumulation of too much ink and blockage, which would cause white edges, missing teeth, serrations and other phenomena at the junction of the first and second regions.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, the mesh corresponding to the second region is interlaced to form multiple third mesh openings. In the direction of the straight line where the second width is located, between the two parallel and closest boundaries in the second region, the sum of the number of second mesh openings and third mesh openings is less than or equal to 2.

[0007] Based on the above technical solution, by limiting the number of mesh holes between the parallel and closest boundaries that make up the second region, the range of the second region can be effectively limited. Thus, when ink is filled in the second region, the white edges, missing teeth, jagged edges, etc., will not occur between the first region and the second region due to excessive ink filling or excessive fluctuation of ink within the region.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the boundaries used to form the second mesh include a first boundary and a second boundary, the first boundary being parallel to the second boundary, and the second width being equal to the maximum vertical distance between the first boundary and the second boundary.

[0009] Based on the above technical solution, if the maximum vertical distance from any point in the second mesh to the boundary is the distance from the first boundary to the second boundary, it indicates that the range of the second region is very small, that is, the distance between the two parallel and closest boundaries does not exceed the first width of the first mesh. In this case, after the second region is filled with ink, the erosion of the ink on the first region will be minimized, that is, the appearance of white edges, missing teeth, jagged edges and other phenomena at the junction of the first region and the second region will be minimized.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the mesh corresponding to the first region intersects with the boundary of the second region to form multiple fourth mesh openings, the fourth mesh openings are filled with photosensitive emulsion, and the second and third mesh openings are used to fill ink.

[0011] Secondly, a method for preparing a screen printing stencil structure is provided. The method includes: obtaining a first screen, wherein the mesh of the first screen has a photosensitive emulsion coating; covering the first screen with a positive film, the positive film including an outer ring portion and a hollow portion, the hollow portion being used to expose a first area of ​​the mesh, and the outer ring portion being used to cover the first area of ​​the mesh; a second area being used to fill ink, the first screen also including a first area, the first area being the area of ​​the first screen excluding the second area; the first area including a first mesh, the first mesh being a mesh formed by the interlacing of the mesh on the first area; the second area including a second mesh, the second mesh being a mesh formed by the interlacing of the mesh in the second area and the boundary of the second area, and the length of the mesh constituting the second mesh being greater than the length of the boundary; wherein the first mesh is filled with the photosensitive emulsion coating, the second width of the second mesh is 1 / 2 to 2 / 3 of the first width of the first mesh, the second width is the maximum vertical distance from a position in the second mesh to the boundary on a straight line, the first width is the distance between the two positions with the largest distance in the first mesh, and the straight line containing the first width is parallel to the straight line containing the second width.

[0012] In conjunction with the second aspect, in some implementations of the second aspect, the second region also includes a third mesh, which is a mesh formed by the interlacing of the meshes in the second region. In the direction of the straight line where the second width is located, between the two parallel and closest boundaries in the second region, the sum of the number of the second mesh and the third mesh is less than or equal to 2.

[0013] In conjunction with the second aspect, in some implementations of the second aspect, obtaining the first screen printing plate includes: obtaining the first screen fabric, applying photosensitive emulsion to the first screen fabric, and drying it.

[0014] The technical effects of the methods shown in the second aspect above can be referenced in the first aspect and its possible designs.

[0015] Thirdly, a display substrate is provided, including a glass cover plate covered by a screen printing stencil structure as described in any one of the first to second aspects.

[0016] Fourthly, a fabrication apparatus for a screen printing stencil structure is provided, comprising a processor and a memory, wherein the processor and the memory are connected, wherein the memory is used to store program code, and the processor is used to call the program code to execute the method in any possible implementation of the method design in the second aspect above. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a screen printing stencil structure provided in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the second region structure of a screen printing stencil provided in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of another screen printing stencil second region structure provided in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of a screen printing stencil manufacturing process provided in an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of a screen printing stencil manufacturing process provided in an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of a mesh stretcher provided in an embodiment of this application.

[0023] Figure 7 This is a schematic diagram of a mesh sizing process provided in an embodiment of this application.

[0024] Figure 8 This application provides a film positive image suitable for manufacturing mobile phone glass panels.

[0025] Figure 9 This is a schematic diagram of a method for applying film to a screen printing stencil, provided in an embodiment of this application. Detailed Implementation

[0026] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0027] This application will present various aspects, embodiments, or features relating to a system comprising multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches are also possible.

[0028] Furthermore, in the embodiments of this application, the words "exemplary," "for example," etc., are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" in the embodiments of this application should not be construed as being better or more advantageous than other embodiments or design schemes. Specifically, the use of the term "exemplary" is intended to present the concept in a concrete manner.

[0029] The business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0030] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0031] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0032] In the description of the embodiments of this application, the terms "upper," "lower," "left," "right," "inner," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship relative to the orientation or position of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and not to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They can change accordingly depending on the orientation of the components in the accompanying drawings, and therefore should not be construed as limiting this application.

[0033] In the embodiments of this application, the same reference numerals are used to denote the same component or part. For the same part in the embodiments of this application, only one part or component may be labeled with reference numerals in the figures. It should be understood that the reference numerals also apply to other identical parts or components. In addition, the various parts in the figures are not drawn to scale, and the dimensions and sizes of the parts shown in the figures are only exemplary and should not be construed as limiting this application.

[0034] Screen printing stencils are now widely used in various fields, including electronics and semiconductors. In mobile phone displays, the cover glass, as the outermost layer protecting internal components, is typically made of microcrystalline glass. Screen printing technology is used to apply black mask (BM) ink to the edges of the cover glass, enhancing its buffering effect against external forces and providing a protective film to prevent surface damage and extend its lifespan. However, current screen printing stencil manufacturing processes for electronic products lack clear requirements for the screen's mesh lines. This often results in uneven mesh lines or excessive cross-grid lines during post-printing washing. When filling the area with ink in such cases, the large size of the pattern area or the uneven edges cause significant ink fluctuations, leading to jagged edges, serrations, and white edges on the cover glass. This results in poor printing yield and reduced production efficiency due to numerous defective stencils.

[0035] In view of this, embodiments of this application provide a screen printing stencil structure and a method for preparing the screen printing stencil structure, which can be applied to cover glass of mobile phone displays, printed circuit boards (PCBs), and silver paste circuit printing of flexible electronics, including but not limited to. Embodiments of this application mainly take the application on cover glass of mobile phone displays as an example to summarize the technical solution. By limiting the area occupied by the printed pattern, it is ensured that the ink in the pattern area will not fluctuate drastically after ink is filled, thereby reducing the occurrence of defects such as missing teeth, jagged edges, and white edges in the edge area of ​​the cover glass and improving the printing yield.

[0036] Figure 1 A schematic diagram of a screen printing stencil structure provided in an embodiment of this application is shown. Figure 2 A schematic diagram of the second region structure of a screen printing stencil provided in an embodiment of this application is shown.

[0037] refer to Figure 1 As shown, the screen printing stencil structure includes a mesh, which comprises a first region 110 and a second region 120. The second region 120 divides the first region 110 into two parts. By way of example and not limitation, the second region 120 can serve as the edge area of ​​the phone's cover glass and is used for filling ink, providing a buffer against external pressure for the internal components of the phone. The first region 110, surrounded by the second region 120, can be used as the display area of ​​the phone's cover glass.

[0038] In some possible embodiments, the screen printing stencil may be composed of a mesh coated with photosensitive emulsion (or screen printing mesh). The first region 110 includes a plurality of first mesh openings 130 formed by interlacing mesh fibers, and all of the first mesh openings 130 are filled with photosensitive emulsion. The second region 120 includes a plurality of second mesh openings 140, which are mesh openings formed by the interlacing of mesh fibers in the second region with the boundary of the second region, and the length of the mesh fibers constituting the second mesh opening is greater than the length of the boundary. The second mesh openings 140 may be empty openings without any filler.

[0039] In some possible embodiments, the first region 110 may further include a fourth mesh 160, which is a mesh formed by the intersection of the mesh of the first region 110 and the boundary of the second region 120.

[0040] As an example and not a limitation, 420-mesh polyester mesh can be used as the mesh material for the above-mentioned screen printing stencil. The diameter of the polyester mesh is 27μm to 31μm, the screen tension is 19N to 23N, the coating thickness of the first area where the photosensitive emulsion is applied is 9μm to 1μm, and the angle between the mesh and the frame of the screen printing stencil, i.e., the screen tension angle, is 22.5 degrees or 45 degrees.

[0041] Based on the above technical solution, compared with the 350-mesh and 500-mesh meshes currently used in mainstream mobile phone glass covers, the 420-mesh mesh has higher printing precision than the 350-mesh mesh, and will not experience ink clogging as seen with the 500-mesh mesh due to its small mesh size. Therefore, it is a material that can improve printing yield in the production of mobile phone glass covers.

[0042] In some possible embodiments, reference Figure 2 As shown, the aperture of the first mesh 130 is referred to as the first width, and the maximum vertical distance between the mesh forming the second mesh 140 and the boundary is the second width. Where the line containing the first width is parallel to or overlaps with the line containing the second width, the second width of the second mesh 140 can be 1 / 2 to 2 / 3 of the first width of the first mesh 130.

[0043] In some possible embodiments, the boundary of the second region may include a first boundary and a second boundary, with the first boundary parallel to the second boundary, see [reference needed]. Figure 3 When the boundaries constituting the second mesh are the first boundary and the second boundary, the second width is equal to the maximum vertical distance between the first boundary and the second boundary. Alternatively, the maximum vertical distance in the second mesh can be understood as the distance between the line containing the first boundary and the line containing the second boundary.

[0044] For example, the mesh count of screen printing stencils typically used in the production of mobile phone glass covers is 350 to 500 mesh. The mesh size corresponding to 350 to 500 mesh, i.e., the first width of the first mesh, ranges from 0.025 mm to 0.039 mm. In the structure of the screen printing stencil provided in this application, the second width of the second mesh, i.e., the maximum vertical distance from the position of the second mesh to the boundary of the second region, can be 1 / 2 to 2 / 3 of the aforementioned first width. Therefore, the second width of the second mesh corresponding to the screen printing stencil provided in this application embodiment ranges from approximately 0.012 mm to 0.026 mm. It should be noted that this application embodiment does not impose any limitations on the specific mesh count of the screen printing stencil or the specific width values ​​of the first and second meshes.

[0045] Based on the above technical solution, by setting the second width of the second mesh to 1 / 2 to 2 / 3 of the first width of the first mesh, the ink at the junction of the second and first regions can be cleared in time when the second region is filled with ink, avoiding the accumulation of too much ink and blockage, which would cause white edges, missing teeth, serrations and other phenomena at the junction of the first and second regions.

[0046] Furthermore, the second region may also include a third mesh 150, which, unlike the second mesh 140, may be entirely composed of the mesh in the second region.

[0047] In some possible embodiments, the third mesh 150 can be as follows: Figure 2 The arrangement of the third mesh 150 as shown can be staggered with the second mesh 140, or it can be located in the direction of the line containing the second width of the second mesh 140; this application does not impose any limitation on this. The third width of the third mesh 150, that is, the distance between the two positions with the largest distance in the third mesh 150, can be the same as the first width of the first mesh.

[0048] In addition, such as Figure 2 or Figure 3 The boundary of the second region shown can have a sum of 2 or less the number of second and third meshes between two parallel and closest boundaries, in the direction of the line containing the second or third width.

[0049] Based on the above technical solution, by limiting the number of mesh holes between the parallel and closest boundaries that make up the second region, the range of the second region can be effectively limited. Thus, when ink is filled in the second region, the white edges, missing teeth, jagged edges, etc., will not occur between the first region and the second region due to excessive ink filling or excessive fluctuation of ink within the region.

[0050] It should be understood that Figure 1 , Figure 2 and Figure 3 The specific size and shape of the first and second mesh openings are merely exemplary, and the embodiments of this application do not impose any limitations.

[0051] Figure 4 A schematic diagram of a screen printing stencil manufacturing process provided in an embodiment of this application is shown. Figure 4 The method shown may include the following steps.

[0052] S410, get the first web version.

[0053] In some possible embodiments, the mesh of the first screen may have a photosensitive emulsion coating. The method for obtaining the first screen can be referred to the content described in S520 below, but the embodiments of this application do not limit the method for obtaining the first screen.

[0054] S420 overlays the positive film image onto the first screen.

[0055] In some possible embodiments, the positive film includes an outer ring portion and a hollow portion. The hollow portion is used to expose a first area of ​​the mesh, and the outer ring portion is used to cover a second area of ​​the mesh. The second area is used to fill ink. The first screen also includes a first area, which is the area of ​​the first screen excluding the second area. The first area includes a first mesh, which is a mesh formed by the interlacing of mesh on the first area. The second area includes a second mesh, which is a mesh formed by the interlacing of mesh in the second area and the boundary of the second area, and the length of the mesh forming the second mesh is greater than the length of the boundary. The first mesh is filled with a photosensitive emulsion coating. The second width of the second mesh is 1 / 2 to 2 / 3 of the first width of the first mesh, and the second width is the maximum vertical distance between the mesh forming the second mesh and the boundary. The first width is the aperture of the first mesh, and the line containing the first width is parallel to the line containing the second width.

[0056] Based on the above technical solutions, the frequency of phenomena such as missing teeth, jagged edges, and white edges that occur during screen printing can be effectively reduced, thereby improving the printing yield.

[0057] Figure 5 A schematic diagram of a screen printing stencil manufacturing process provided in an embodiment of this application is shown. Figure 5 The method described above can be used as a reference. Figure 4 Detailed description of the method. Figure 5 The method shown may include the following steps.

[0058] S510, stretching the mesh.

[0059] In some possible embodiments, firstly, a suitable screen printing mesh corresponding to the screen printing stencil used for manufacturing mobile phone glass covers is selected, including but not limited to polyester mesh, nylon mesh, and stainless steel mesh. Secondly, a suitable-sized frame is selected and sanded to ensure a tight bond between the frame and the screen printing mesh. Thirdly, adhesive is evenly applied to the sanded frame. When the adhesive is semi-dry, the selected screen printing mesh is stretched to meet the required tension, and then adhered to the frame. See also... Figure 6 , Figure 6 This is a schematic diagram of a screen printing mesh stretching process provided in an embodiment of this application. As an example and not a limitation, the screen frame can be placed on a screen stretching machine, and the screen printing mesh 610 can be stretched according to the required force of the screen frame. After the force is reached, the screen printing mesh is pressed tightly against the side of the screen frame with adhesive applied, and the area where the screen printing mesh is bonded to the screen frame is scraped with a scraper to ensure that the screen printing mesh is fully bonded to the screen frame.

[0060] For example, a 420-mesh polyester mesh with a wire diameter of 27μm to 31μm can be selected and stretched to achieve a screen tension of 19N to 23N, meeting the requirements for screen printing stencils used in making mobile phone glass panels. The mesh can then be combined with a suitable frame coated with adhesive, with the angle between the combined mesh and the frame, i.e., the screen tension angle, being 22.5 degrees or 45 degrees.

[0061] In addition, you can apply degreaser to the screen frame and screen after the screen is stretched, and rub both sides of the screen printing screen with a brush to make the screen filter oil better and enhance its tightness with the photosensitive emulsion.

[0062] S520 is used to sizing the mesh.

[0063] In some possible embodiments, a photosensitive emulsion is evenly applied to the finished screen printing mesh 610, as can be seen in [reference needed]. Figure 7 , Figure 7 This is a schematic diagram of a screen printing mesh coated with photosensitive emulsion, provided as an embodiment of this application. It should be noted that the photosensitive emulsion must not be exposed to strong light during the entire coating process. After coating with the photosensitive emulsion, the screen printing mesh is dried to generate the first screen printing plate 710.

[0064] For example, photosensitive emulsion can be applied to the screen printing mesh to a thickness of 9μm to 12μm, that is, the coating thickness of the photosensitive emulsion is 9μm to 12μm. This thickness range is consistent with the screen printing stencil used to make mobile phone glass panels. This allows the display area and the ink area of ​​the mobile phone glass panel to maintain a sufficiently clear distinction, without causing the ink area to have a strong three-dimensional effect due to excessive coating thickness.

[0065] Before introducing the film positive provided in the embodiments of this application, let's briefly introduce the role of the film positive in printing.

[0066] A positive film, also known as a film negative, is a printing plate used in the printing industry to create printed materials. It plays a crucial role in printing production. Its main function is to accurately reproduce the original image information, ensuring the quality and color consistency of the printed product. By transferring image information onto the positive film, printers can use this plate for mass production, ensuring that each printed copy is consistent with the original.

[0067] In some possible embodiments, the film positive image can be used to manufacture, but is not limited to, mobile phone microcrystalline glass panels, for example, see below. Figure 8 .

[0068] Figure 8 This application provides a film positive image suitable for manufacturing mobile phone glass panels.

[0069] refer to Figure 8 As shown, the black area of ​​the film positive image can be used to delineate the black ink area 810 at the edge of the mobile phone glass panel, while the white area 820 surrounded by the black area can be the display area in the mobile phone glass panel.

[0070] S530 overlays (or pastes) the positive film onto the first screen.

[0071] In some possible embodiments, with Figure 8 Taking the manufacturing of mobile phone glass panels using film positives as an example, the process of applying film positives to the first screen printing plate obtained in S420 can be found in [reference needed]. Figure 9 .

[0072] Figure 9 This is a schematic diagram of a method for applying film to a screen printing stencil, provided in an embodiment of this application.

[0073] refer to Figure 9 As shown, the area on the positive film that occupies the first screen is called the second region 120, and this second region 120 can be... Figure 8 The black ink area 810 shown is used for ink filling in subsequent stages. The area in the first screen printing plate other than the second area 120 can be referred to as the first area 110, and the first area 110 enclosed by the second area 120 can be... Figure 8 The white area 820 shown (or display area). The second area 120 and the first area 110 can be respectively connected to... Figure 1 and Figure 2The second region 120 and the first region 110 have the same characteristics. The second region 120 includes multiple second mesh openings, which are formed by the interlacing of mesh fabric within the second region and the boundary of the second region, with the length of the mesh fabric forming the second mesh openings exceeding the length of the boundary. The first region 110 includes multiple first mesh openings formed by the interlacing of mesh fabric. Currently, both the first and second mesh openings are filled with photosensitive emulsion.

[0074] In some possible embodiments, the second width of the second mesh can be set to 1 / 2 to 2 / 3 of the first width of the first mesh by changing the size of the pattern on the positive film, such that the line containing the first width is parallel to or overlaps with the line containing the second width. Here, the second width is the maximum vertical distance between the mesh forming the second mesh and its boundary, and the first width is the aperture of the first mesh.

[0075] In some possible embodiments, the boundary of the second region may include a first boundary and a second boundary, with the first boundary parallel to the second boundary, see [reference needed]. Figure 3 When the boundaries constituting the second mesh are the first boundary and the second boundary, the second width is equal to the maximum vertical distance between the first boundary and the second boundary. Alternatively, the maximum vertical distance in the second mesh can be understood as the distance between the line containing the first boundary and the line containing the second boundary.

[0076] For example, the mesh count of the screen printing stencil used to produce mobile phone glass covers can be 350 to 500 meshes. The mesh size range for 350 mesh is 0.039 mm, and for 500 mesh is 0.025 mm. Therefore, in the preparation method provided in this application embodiment, the first width of the first mesh is between 0.025 mm and 0.039 mm, and the second width of the second mesh, i.e., the maximum vertical distance from the position of the second mesh to the boundary of the second region, can be set to 1 / 2 to 2 / 3 of the first width. Therefore, the second width of the second mesh is approximately between 0.012 mm and 0.026 mm. It should be noted that this application embodiment does not impose any limitations on the specific mesh count of the screen printing stencil or the specific width values ​​of the first and second meshes.

[0077] Based on the above technical solution, by setting the second width of the second mesh to 1 / 2 to 2 / 3 of the first width of the first mesh, the ink at the junction of the second and first regions can be cleared in time when the second region is filled with ink, avoiding the accumulation of too much ink and blockage, which would cause white edges, missing teeth, serrations and other phenomena at the junction of the first and second regions.

[0078] Furthermore, a third mesh can be provided in the second region. Unlike the second mesh, the third mesh can be made entirely of the mesh in the second region.

[0079] In some possible embodiments, the third mesh may be staggered with the second mesh, or it may be located in the direction of the line containing the second width of the second mesh; this application does not limit this in any way. The third width of the third mesh, that is, the distance between the two positions with the largest distance in the third mesh, may be the same as the first width of the first mesh.

[0080] In addition, such as Figure 2 or Figure 3 The boundary of the second region shown can have a sum of 2 or less the number of second and third meshes between two parallel and closest boundaries, in the direction of the line containing the second or third width.

[0081] Based on the above technical solution, by limiting the number of mesh holes between the parallel and closest boundaries that make up the second region, the range of the second region can be effectively limited. Thus, when ink is filled in the second region, the white edges, missing teeth, jagged edges, etc., will not occur between the first region and the second region due to excessive ink filling or excessive fluctuation of ink within the region.

[0082] S540 is used to expose, wash, and dry the first screen printing plate.

[0083] In some possible embodiments, after applying the positive film to the first screen printing plate in the method described in S430, the first screen printing plate can be sequentially exposed, washed, and dried. As an example and not a limitation, the first screen printing plate can be placed in an exposure machine, and the first parameter of the exposure machine can be adjusted to values ​​suitable for generating the pattern on the positive film of the first screen printing plate. After exposure, washing is performed, and the photosensitive emulsion on the second area occupied by the positive film will completely peel off. The second mesh holes in the second area will become unfilled voids. These voids will be used to fill ink in subsequent mobile phone glass panel manufacturing processes. This ink can enhance the display area, i.e., the buffering effect of the first area of ​​the first screen printing plate against external forces, and can also provide a protective film to prevent surface damage and extend the lifespan of the display area. Finally, the first screen printing plate is dried.

[0084] S550, for inspecting the first screen print and performing a second exposure.

[0085] In some possible embodiments, firstly, it is checked whether the mesh between the boundaries of the second region of the dried first screen conforms to the specifications prepared using the method described in S430. For example, whether the second width of the second mesh opening meets the requirement of 1 / 2 to 2 / 3 of the first width of the first mesh opening. Another example is checking whether the sum of the number of second and third mesh openings between two parallel and closest boundaries in the second region, in the direction of the line containing the aforementioned second width, is less than or equal to 2. After confirmation, the first screen is subjected to a second exposure. The method used for the second exposure can be the same as the first exposure method. Using two exposures can enhance the bonding strength between the photosensitive emulsion and the mesh in the first region of the first screen, ultimately yielding... Figure 1 The screen printing stencil structure shown.

[0086] It should be noted that the specific size and shape of the first and second meshes described above are merely exemplary, and the embodiments of this application do not impose any limitations.

[0087] Based on the above technical solution, by setting the second width of the second mesh to 1 / 2 to 2 / 3 of the first width of the first mesh, and making the number of meshes between the parallel and closest boundaries that make up the second region less than or equal to 2, it is possible to avoid excessive ink accumulation causing blockage and resulting in white edges, missing teeth, serrations, and other phenomena at the junction of the first and second regions.

[0088] Accordingly, this application also proposes a screen printing stencil fabrication apparatus, including a processor and a memory, wherein the processor and the memory are connected, wherein the memory is used to store program code, and the processor is used to call the program code to execute any of the above-described screen printing stencil fabrication methods.

[0089] In addition, embodiments of this application provide a display substrate including a glass cover plate, which is covered by any of the screen printing stencil structures described above.

[0090] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0091] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0095] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0096] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A screen printing screen structure, characterized in that, The method comprises: obtaining a first screen, the screen of the first screen having a photosensitive paste film on the screen; covering a positive film on the first screen, the positive film comprising an outer ring portion and a hollow portion, the hollow portion being used for exposing a first area of the screen, and the outer ring portion being used for shielding a second area of the screen; 2. The screen printing screen structure according to claim 1, characterized in that the second area being used for filling ink; 3. The screen printing screen structure according to claim 1 or 2, characterized in that the first area comprising a first mesh hole, the first mesh hole being a mesh hole formed by the screen interlacing in the first area; 4. The screen printing structure of claim 2, wherein, the second area comprising a second mesh hole, the second mesh hole being a mesh hole formed by the screen interlacing in the second area and the length of the screen forming the second mesh hole being greater than the length of the boundary forming the second mesh hole; 5. A method of preparing a screen printing screen structure, characterized by wherein the first mesh hole is filled with the photosensitive paste film, the second width of the second mesh hole being 1 / 2 to 2 / 3 of the first width of the first mesh hole, the second width being the maximum vertical distance between the screen forming the second mesh hole and the boundary, the first width being the aperture of the first mesh hole, and the straight line where the first width is located being parallel to the straight line where the second width is located. the second area corresponding to the screen interlacing to form a plurality of third mesh holes (150), in the direction of the straight line where the second width is located, between two parallel and closest boundaries in the second area, the sum of the number of the second mesh holes (140) and the third mesh holes (150) being less than or equal to 2. the boundary for forming the second mesh hole (140) comprises a first boundary and a second boundary, the first boundary being parallel to the second boundary, and the second width being equal to the maximum vertical distance between the first boundary and the second boundary. the screen corresponding to the first area interlacing with the boundary of the second area to form a plurality of fourth mesh holes (160), the fourth mesh holes (160) being filled with photosensitive paste, and the second mesh holes (140) and the third mesh holes (150) being used for filling ink. The method comprises: obtaining a first screen, the screen of the first screen having a photosensitive paste film on the screen; covering a positive film on the first screen, the positive film comprising an outer ring portion and a hollow portion, the hollow portion being used for exposing a first area of the screen, and the outer ring portion being used for shielding a second area of the screen; the second area being used for filling ink; the first area comprising a first mesh hole, the first mesh hole being a mesh hole formed by the screen interlacing in the first area; the second area comprising a second mesh hole, the second mesh hole being a mesh hole formed by the screen interlacing in the second area and the length of the screen forming the second mesh hole being greater than the length of the boundary forming the second mesh hole; wherein the first mesh hole is filled with the photosensitive paste film, the second width of the second mesh hole being 1 / 2 to 2 / 3 of the first width of the first mesh hole, the second width being the maximum vertical distance between the screen forming the second mesh hole and the boundary, the first width being the aperture of the first mesh hole, and the straight line where the first width is located being parallel to the straight line where the second width is located.

6. The method of claim 5, wherein, The second area further comprises third meshes, which are meshes formed by the interlacing of the screen gauzes in the second area, and the sum of the number of the second meshes and the third meshes between two parallel and closest boundaries in the second area in the direction of the straight line where the second width is located is less than or equal to 2.

7. The method according to claim 5 or 6, characterized in that, The obtaining the first screen plate comprises: obtaining a first screen gauze; applying a photosensitive paste to the first screen gauze and drying.

8. A device for preparing a screen printing screen structure, characterized in that A device comprising a processor and a memory, wherein the processor and the memory are connected, wherein the memory is configured to store program code, and the processor is configured to invoke the program code to execute the method according to any one of claims 5 to 7.

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