Screen printing plate structure, preparation method, preparation device and display substrate

Abstract

The invention provides a screen printing plate structure, a preparation method, a preparation device and a display substrate, which can be applied to cover plate glass of a mobile phone display screen, the range of an area occupied by a printing pattern is limited, and the size of meshes in the area occupied by the printing pattern is regulated, so that after the area is filled with printing ink, the printing quality of the area is ensured. And the ink does not fluctuate violently in the area, so that the phenomena of tooth defects, sawteeth, white edges and the like in the edge area of the cover plate glass are reduced, and the printing yield is improved.

Description

Technical Field

[0001] The present application relates to the technical field of microcrystalline glass, and more specifically, to the structure and preparation method of a silk screen printing screen, a preparation device, and a display substrate. Background Art

[0002] Mobile phone microcrystalline glass panels are one of the most commonly used display substrates. They are usually located in the layer closest to the surface of the mobile phone display screen to protect the internal components of the display screen from damage. After the mobile phone microcrystalline glass panel completes the transparent glass processing process, it is necessary to print black mask (BM) ink on all sides of the transparent glass, that is, to perform the screen printing process. However, during the screen printing process, BM ink is often affected by the quality of the screen printing plate, which will cause the edge area of ​​the transparent glass to have teeth, jagged edges, white edges, etc., resulting in a loss of printing yield. Summary of the invention

[0003] The present application provides a structure and preparation method of a silk screen, a preparation device, and a display substrate, which can effectively reduce the frequency of tooth chipping, serrations, white edges and the like that occur during silk screen printing, thereby improving the printing yield.

[0004] In the first aspect, a screen printing structure is provided, the screen printing structure comprising: a mesh, the mesh comprising a first area and a second area, the second area surrounding the first area, the mesh corresponding to the first area interlaced to form a plurality of first mesh holes, the first mesh holes are filled with photosensitive paste, the mesh corresponding to the second area of ​​the mesh is interlaced with the boundary of the second area to form a plurality of second mesh holes, and the length of the mesh constituting the second mesh holes is greater than the length of the above-mentioned boundary. The second width of the second mesh hole is 1 / 2 to 2 / 3 of the first width of the first mesh hole, the second width is the maximum vertical distance between the mesh constituting the second mesh hole and the above-mentioned boundary, the first width is the aperture of the first mesh hole, and the straight line where the first width is located is parallel to the straight line where the second width is located.

[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 area and the first area can be cleared in time when the second area is filled with ink, so as to avoid excessive accumulation of ink and cause blockage, resulting in white edges, tooth gaps, jagged edges and the like at the junction of the first area and the second area.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the mesh corresponding to the second area is interlaced to form a plurality of third meshes, and 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 numbers of the second meshes and the third meshes is less than or equal to 2.

[0007] Based on the above technical solution, by limiting the number of meshes between the parallel and closest boundaries constituting the second area, the scope of the second area can be effectively limited. Therefore, when the second area is filled with ink, there will be no white edges, missing teeth, jagged edges, etc. between the first area and the second area due to excessive filling of ink and excessive fluctuations of the ink in the area.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the boundary used to form the second mesh includes a first boundary and a second boundary, the first boundary is parallel to the second boundary, and the second width is 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 area is very small, that is, the distance between its two parallel and closest boundaries does not exceed the first width of the first mesh. In this case, after the second area is filled with ink, the erosion of the ink on the first area will be minimized, that is, the white edges, tooth gaps, jagged edges and other phenomena at the junction of the first area and the second area will be minimized.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the mesh corresponding to the first area is interlaced with the boundary of the second area to form a plurality of fourth mesh holes, the fourth mesh holes are filled with photosensitive paste, and the second mesh holes and the third mesh holes are used to fill with ink.

[0011] In a second aspect, a method for preparing a screen printing structure is provided, the method comprising: obtaining a first screen, the screen having a photosensitive paste coating on the screen; covering the first screen with a film positive image, the film positive image comprising an outer ring portion and a hollow portion, the hollow portion being used to expose a first area of ​​the screen, and the outer ring portion being used to shield the first area of ​​the screen; the second area being used to fill ink, the first screen also comprising a first area, the first area being an area of ​​the first screen except the second area; the first area comprising a first mesh hole, the first mesh hole being a mesh hole formed by interlacing the screen on the first area; the second area comprising a second mesh hole, the second mesh hole being a mesh hole formed by interlacing the screen in the second area and the boundary of the second area, and the length of the screen constituting the second mesh hole being greater than the length of the boundary; wherein the first mesh hole is filled with a photosensitive paste coating, the second width of the second mesh hole is 1 / 2 to 2 / 3 of the first width of the first mesh hole, the second width is the maximum vertical distance from a position in the second mesh hole to a straight line where the boundary is located, the first width is the distance between two positions with the largest distance in the first mesh hole, and the straight line where the first width is located is parallel to the straight line where the second width is located.

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

[0013] In combination with the second aspect, in some implementations of the second aspect, obtaining the first screen includes: obtaining a first mesh, applying photosensitive slurry to the first mesh, and drying it.

[0014] The technical effects of the method shown in some possible designs of the above second aspect can refer to the technical effects in the first aspect and its possible designs.

[0015] In a third aspect, a display substrate is provided, comprising a glass cover plate, wherein the glass cover plate is covered by the silk screen structure as described in any one of the first to second aspects.

[0016] In a fourth aspect, a device for preparing a silk screen 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 a method in any possible implementation mode of the method design of the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a silk screen structure provided in an embodiment of the present application.

[0018] Figure 2 This is a schematic diagram of the structure of the second area of ​​a silk-screen screen provided in an embodiment of the present application.

[0019] Figure 3 This is a schematic diagram of the structure of the second area of ​​another silk-screen screen provided in an embodiment of the present application.

[0020] Figure 4 It is a schematic diagram of a silk screen manufacturing process provided in an embodiment of the present application.

[0021] Figure 5 It is a schematic diagram of a silk screen manufacturing process provided in an embodiment of the present application.

[0022] Figure 6 It is a schematic diagram of a mesh stretching net provided in an embodiment of the present application.

[0023] Figure 7 It is a schematic diagram of mesh sizing provided in an embodiment of the present application.

[0024] Figure 8 The embodiment of the present application provides a film positive pattern suitable for manufacturing mobile phone glass panels.

[0025] Fig. 9 It is a schematic diagram of a method for attaching film to a silk screen provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0027] The embodiments of the present application will present various aspects, embodiments or features around a system including multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all devices, components, modules, etc. discussed in conjunction with the figures. In addition, combinations of these schemes may also be used.

[0028] In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0029] The business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0030] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0031] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can be represented by: including the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers 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 be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0032] In the description of the embodiments of the present application, the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "inside", "outside", "vertical" and "horizontal" are defined relative to the directions or positions of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, rather than indicating or implying that the device or component referred to must have a specific direction, or be constructed and operated in a specific direction. They may change accordingly according to changes in the directions of the components placed in the drawings, and therefore cannot be understood as limitations on the present application.

[0033] In the embodiments of the present application, the same reference numerals are used to represent the same components or parts. For the same parts in the embodiments of the present application, only one of the parts or parts may be marked with a reference numeral in the figure. It should be understood that the reference numerals are also applicable to other identical parts or parts. In addition, the various parts in the drawings are not drawn to scale, and the sizes and dimensions of the parts shown in the drawings are only exemplary and should not be understood as limiting the present application.

[0034] Screen printing screens have been widely used in many fields, including electronic products and semiconductors. The cover glass of the mobile phone display screen is the outermost structure to protect the internal components of the mobile phone. It is usually made of microcrystalline glass. The screen printing screen technology is used to apply black mask (BM) ink to the edge area of ​​the cover glass, which can enhance the buffering effect of the external force of the display screen and provide a protective film for the mobile phone screen to prevent the surface from being damaged and extend the service life of the screen. However, in the current production process of screen printing screens for electronic products, there is no clear requirement for the screen wire when printing patterns. Therefore, when washing after printing, the screen wire of the printed pattern often appears to be not straight or crosses many grids. In this case, when filling the area where the pattern is located with ink, the area of ​​the pattern is too large or the edge line of the area is not straight, resulting in the above ink After filling, the fluctuation will be more violent, and then the edge area of ​​the cover glass will appear tooth missing, jagged, white edge and other phenomena, resulting in printing yield loss, and also due to the appearance of many unqualified screen printing screens in the production process, resulting in a decrease in production efficiency.

[0035] In view of this, the embodiments of the present application provide a silk screen structure and a method for preparing the silk screen structure, which can be applied to the cover glass of mobile phone display screens, printed circuit boards (PCBs), and silver paste circuit printing of flexible electronics, including but not limited to. The embodiments of the present application mainly summarize the technical solution by taking the application on the cover glass of mobile phone display screens as an example, and limit the range occupied by the printed pattern to ensure that after filling with ink, the ink in the area where the pattern is located will not fluctuate violently, thereby reducing the occurrence of tooth gaps, jagged edges, white edges and the like in the edge area of ​​the cover glass, thereby improving the printing yield.

[0036] Figure 1 A schematic diagram of a silk-screen screen structure provided in an embodiment of the present application is shown. Figure 2 A schematic diagram of the structure of the second area of ​​a silk-screen screen provided in an embodiment of the present application is shown.

[0037] refer to Figure 1 As shown, the screen printing screen structure includes a mesh, and the mesh includes a first area 110 and a second area 120, wherein the second area 120 divides the first area 110 into two parts. As an example but not a limitation, the second area 120 can be used as the edge area of ​​the mobile phone cover glass and is used to fill ink, which can provide a buffering effect for the internal components of the mobile phone against external pressure. The first area 110 surrounded by the second area 120 can be used as the display area of ​​the mobile phone cover glass.

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

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

[0040] As an example but not limitation, 420 mesh polyester mesh can be used as the mesh material of the above-mentioned silk screen printing screen. The wire 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 paste is applied is 9μm to 1μm, and the angle between the mesh and the silk screen frame, that is, the 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 cover plates, the 420-mesh mesh has higher printing accuracy than the 350-mesh mesh, and will not cause ink clogging of the 500-mesh mesh due to the small mesh size. Therefore, it is a material that can improve the printing yield for the production of mobile phone glass cover plates.

[0042] In some possible embodiments, reference Figure 2 As shown, the aperture of the first mesh 130 is called the first width, and the maximum vertical distance between the mesh and the boundary for forming the second mesh 140 is the second width. Wherein, when the straight line where the first width is located is parallel to or overlaps with the straight line where the second width is located, the size of the second width of the second mesh 140 can be 1 / 2 to 2 / 3 of the size 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, and the first boundary is parallel to the second boundary. 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. It can also be understood that the above-mentioned maximum vertical distance in the second mesh can be the distance from the straight line where the first boundary is located to the straight line where the second boundary is located.

[0044] For example, the mesh count of the silk screen commonly used to produce mobile phone glass cover plates is 350 to 500 mesh, and the mesh size corresponding to the 350 to 500 mesh, that is, the first width of the first mesh, ranges from 0.025 mm to 0.039 mm. In the structure of the silk screen provided in the present application, the second width of the second mesh, that is, the maximum vertical distance from the position in the second mesh to the straight line where the boundary of the second area is located, can be 1 / 2 to 2 / 3 of the above-mentioned first width. Therefore, the second mesh of the silk screen provided in the embodiment of the present application corresponds to the second width range of about 0.012 mm to 0.026 mm. It should be noted that the embodiment of the present application does not make any restrictions on the specific mesh count of the silk screen and the specific values ​​of the widths of the first mesh and the second mesh.

[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 area and the first area can be cleared in time when the second area is filled with ink, so as to avoid excessive accumulation of ink and cause blockage, resulting in white edges, tooth gaps, jagged edges and the like at the junction of the first area and the second area.

[0046] Furthermore, the second region may further include a third mesh 150 . Different from the second mesh 140 , the third mesh 150 may be completely composed of the mesh in the second region.

[0047] In some possible embodiments, the third mesh 150 may be as follows: Figure 2 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, if Figure 2 or Figure 3 As shown in the boundary constituting the second area, between two parallel and closest boundaries, in the direction of the straight line where the second width or the third width lies, the sum of the number of the second meshes and the number of the third meshes may be less than or equal to 2.

[0049] Based on the above technical solution, by limiting the number of meshes between the parallel and closest boundaries constituting the second area, the scope of the second area can be effectively limited. Therefore, when the second area is filled with ink, there will be no white edges, missing teeth, jagged edges, etc. between the first area and the second area due to excessive filling of ink and excessive fluctuations of the ink in the area.

[0050] It should be understood that Figure 1 , Figure 2 and Figure 3 The specific sizes and shapes of the first mesh and the second mesh are merely exemplary and are not limited in any way in the embodiments of the present application.

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

[0052] S410, obtaining a first screen.

[0053] In some possible embodiments, the mesh of the first screen may have a photosensitive slurry coating, and the method for obtaining the first screen may refer to the content described in S520 below, but the embodiment of the present application does not limit the method for obtaining the first screen.

[0054] S420, covering the first halftone with the film positive image.

[0055] In some possible embodiments, the film positive image includes an outer ring portion and a hollow portion, the hollow portion is used to expose the first area of ​​the mesh, and the outer ring portion is used to cover the second area of ​​the mesh; the second area is used to fill ink, and the first screen also includes a first area, which is the area of ​​the first screen except the second area; the first area includes a first mesh, which is a mesh formed by the mesh on the first area interlaced; the second area includes a second mesh, which is a mesh formed by the mesh in the second area and the boundary of the second area interlaced, and the length of the mesh constituting the second mesh is greater than the length of the above-mentioned boundary. Wherein, the first mesh is filled with a photosensitive paste 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 between the mesh used to constitute the second mesh and the above-mentioned boundary, the first width is the aperture of the first mesh, and the straight line where the first width is located is parallel to the straight line where the second width is located.

[0056] Based on the above technical solution, the frequency of occurrence of tooth chipping, sawtooth, white edge and other phenomena during silk screen printing can be effectively reduced, thereby improving the printing yield.

[0057] Figure 5 A schematic diagram of a silk screen manufacturing process provided in an embodiment of the present application is shown. Figure 5 The method can be used as above Figure 4 A 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 mesh corresponding to the silk screen used to manufacture the mobile phone glass cover is selected, including but not limited to polyester mesh, nylon mesh and stainless steel mesh. Secondly, a mesh frame of suitable size is selected and polished so that the mesh frame and the silk screen mesh can be tightly combined. Thirdly, adhesive is evenly applied to the polished mesh frame. When the adhesive is in a semi-dry state, the selected silk screen mesh is stretched to make its tension meet the target requirements, and then the silk screen mesh is bonded to the mesh frame. See Figure 6 , Figure 6 A schematic diagram of a mesh stretching provided in an embodiment of the present application. As an example but not limitation, the mesh frame can be placed on a mesh stretching machine, and the screen printing mesh 610 can be stretched according to the strength required by the mesh frame. When the strength is reached, the screen printing mesh is tightly attached to the mesh frame on the side where the adhesive is applied, and the part where the screen printing mesh and the mesh frame are bonded is scraped with a scraper to fully bond the screen printing mesh and the mesh frame.

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

[0061] In addition, you can apply a degreaser to the screen frame and mesh at the end of the stretching, and rub the front and back sides of the screen printing mesh with a brush to make the mesh more oil-filtering and enhance its tightness with the photosensitive pulp.

[0062] S520, sizing the mesh yarn.

[0063] In some possible embodiments, the photosensitive paste is evenly applied to the screen printing mesh 610 after the screen is stretched. Figure 7 , Figure 7 A schematic diagram of a screen gauze coated with photosensitive paste provided in an embodiment of the present application. It should be noted that during the entire process of coating the photosensitive paste, the photosensitive paste should not be exposed to strong light. After the coating of the photosensitive paste is completed, the screen gauze is dried to generate a first screen plate 710.

[0064] Exemplarily, the photosensitive paste can be applied to the silk-screen mesh to a thickness of 9μm to 12μm, that is, the coating thickness of the photosensitive paste is 9μm to 12μm, which is suitable for making silk-screen screens for mobile phone glass panels. The display area and the ink area of ​​the mobile phone glass panel can maintain a sufficiently clear distinction, and the ink area will not have a strong three-dimensional effect due to excessive coating thickness.

[0065] Before introducing the film positive image provided in the embodiment of the present application, the role of the film positive image in printing is briefly introduced as follows.

[0066] Film positive, also known as film negative, is the base used in the printing industry to make printed products. In printing production, film positive plays an extremely important role. Its main function is to accurately reproduce the original image information to ensure the quality and color consistency of the printed product. By transferring the image information to the film positive, printers can make large-scale printing copies based on this base to ensure that each print is consistent with the original work.

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

[0068] Figure 8 A film positive pattern suitable for manufacturing mobile phone glass panels is provided for the embodiment of the present application.

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

[0070] S530, covering (or sticking) the film positive image on the first halftone plate.

[0071] In some possible embodiments, Figure 8 For example, the positive film manufacturing of the mobile phone glass panel is used as an example. For the first screen paste positive film obtained in S420, see Fig. 9 .

[0072] Fig. 9 It is a schematic diagram of a method for attaching film to a silk screen provided in an embodiment of the present application.

[0073] refer to Fig. 9 As shown, the area of ​​the first halftone occupied by the pattern on the film positive image is called the second area 120, and the second area 120 can be Figure 8 The black ink area 810 shown is used to fill ink in the subsequent stage. The area of ​​the first screen except the second area 120 can be called the first area 110, and the first area 110 surrounded by the second area 120 can be called Figure 8 The white area 820 (or display area) shown in FIG. Figure 1 and Figure 2The second area 120 and the first area 110 have the same characteristics. The second area 120 includes a plurality of second meshes, which are meshes formed by interlacing the mesh in the second area and the boundary of the second area, and the length of the mesh constituting the second mesh is greater than the length of the boundary. The first area 110 includes a plurality of first meshes formed by interlacing the mesh. The first meshes and the second meshes are currently filled with photosensitive paste.

[0074] In some possible embodiments, the size of 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 film positive image, which satisfies that the straight line where the first width is located is parallel to or overlaps with the straight line where the second width is located. The second width is the maximum vertical distance between the mesh used to form the second mesh and the 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, and the first boundary is parallel to the second boundary. 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. It can also be understood that the above-mentioned maximum vertical distance in the second mesh can be the distance from the straight line where the first boundary is located to the straight line where the second boundary is located.

[0076] Exemplarily, the mesh count of the silk screen used to produce the glass cover of the mobile phone can be 350 to 500 meshes, the mesh size range corresponding to the 350 mesh is 0.039 mm, and the mesh size range corresponding to the 500 mesh is 0.025 mm. Therefore, in the preparation method provided in the embodiment of the present application, the first width of the first mesh ranges from 0.025 mm to 0.039 mm, and the second width of the second mesh, that is, the maximum vertical distance from the position in the second mesh to the straight line where the boundary of the second area is located, can be set to 1 / 2 to 2 / 3 of the first width, so the second width corresponding to the second mesh ranges from about 0.012 mm to 0.026 mm. It should be noted that the embodiment of the present application does not make any restrictions on the specific mesh count for preparing the silk screen and the specific values ​​of the widths of the first mesh and the second mesh.

[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 area and the first area can be cleared in time when the second area is filled with ink, so as to avoid excessive accumulation of ink and cause blockage, resulting in white edges, tooth gaps, jagged edges and the like at the junction of the first area and the second area.

[0078] Furthermore, a third mesh may be provided in the second region. Different from the second mesh, the third mesh may be completely formed by the mesh in the second region.

[0079] In some possible embodiments, the third mesh may be arranged in a staggered manner with the second mesh, or may be located in the direction of the straight line where the second width of the second mesh is located, and the embodiments of the present application do not impose any limitation on this. 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, if Figure 2 or Figure 3 As shown in the boundary constituting the second area, between two parallel and closest boundaries, in the direction of the straight line where the second width or the third width lies, the sum of the number of the second meshes and the number of the third meshes may be less than or equal to 2.

[0081] Based on the above technical solution, by limiting the number of meshes between the parallel and closest boundaries constituting the second area, the scope of the second area can be effectively limited. Therefore, when the second area is filled with ink, there will be no white edges, missing teeth, jagged edges, etc. between the first area and the second area due to excessive filling of ink and excessive fluctuations of the ink in the area.

[0082] S540, exposing, washing and drying the first screen.

[0083] In some possible embodiments, after the first screen is attached with a film positive image in the method described in S430, the first screen attached with film can be exposed, washed and dried in sequence. As an example but not a limitation, the first screen can be placed in an exposure machine, and the first parameter of the exposure machine can be adjusted to a value suitable for the first screen to generate a pattern on the film positive image. After exposure, the photosensitive paste on the second area occupied by the film positive image will fall off completely, and the second mesh on the second area will become an empty hole without any filling. The empty hole will be used to fill ink in the subsequent mobile phone glass panel manufacturing process. The ink can enhance the buffering effect of the display area, that is, the first area of ​​the first screen against external forces, and can also provide a protective film for it to prevent the surface from being damaged and extend the service life of the display area. Finally, the first screen is dried.

[0084] S550, check and re-expose the first screen.

[0085] In some possible embodiments, first check whether the grids between the boundaries of the second area of ​​the first screen after drying meet the specifications when prepared using the method described in S430, for example, whether the second width of the second mesh meets the requirement of 1 / 2 to 2 / 3 of the first width of the first mesh, and for another example, check whether the sum of the number of the second mesh and the number of the third mesh between the 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. After confirmation, the first screen is exposed for the second time. The method used for the second exposure can be the same as the method for the first exposure. Using two exposures can enhance the bonding strength between the photosensitive paste and the mesh in the first area of ​​the first screen, and finally the obtained Figure 1 The silk screen structure shown.

[0086] It should be noted that the specific sizes and shapes of the first mesh and the second mesh described above are merely exemplary and are not limited in any way in the embodiments of the present application.

[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 constituting the second area less than or equal to 2, it is possible to avoid excessive accumulation of ink to cause blockage, resulting in white edges, tooth gaps, jagged edges, etc. at the junction of the first area and the second area.

[0088] Correspondingly, an embodiment of the present application also proposes a device for preparing a silk screen screen structure, 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 one of the above-mentioned methods for preparing a silk screen screen structure.

[0089] In addition, an embodiment of the present application provides a display substrate, including a glass cover plate, and the glass cover plate is covered by any one of the silk-screen structures described above.

[0090] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

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

[0092] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

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

[0094] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0095] If the functions are implemented in the form of 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 the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0096] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A screen printing screen structure, characterized in that: include: A mesh, the mesh comprising a first region (110) and a second region (120), the second region (120) surrounding the first region (110), the mesh corresponding to the first region (110) interlaced to form a plurality of first mesh holes (130), the first mesh holes (130) being filled with photosensitive slurry, the mesh corresponding to the second region (120) of the mesh and the boundary of the second region (120) interlaced to form a plurality of second mesh holes (140), and the length of the mesh constituting the second mesh holes (140) being greater than the length of the boundary; The second width of the second mesh (140) is 1 / 2 to 2 / 3 of the first width of the first mesh (130), the second width is the maximum vertical distance between the mesh used to constitute the second mesh (140) and the boundary, the first width is the aperture of the first mesh (130), and the straight line where the first width lies is parallel to the straight line where the second width lies.

2. The screen printing screen structure according to claim 1, characterized in that: The mesh yarns corresponding to the second area (120) are interlaced to form a plurality of third mesh holes (150), and in the direction of the straight line where the second width is located, between two parallel and closest boundaries in the second area (120), the sum of the number of the second mesh holes (140) and the number of the third mesh holes (150) is less than or equal to 2.

3. The screen printing screen structure according to claim 1 or 2, characterized in that: The borders for constituting the second mesh (140) include a first border and a second border, the first border is parallel to the second border, and the second width is equal to the maximum vertical distance between the first border and the second border.

4. The screen printing screen structure according to claim 2 or 3, characterized in that: The mesh corresponding to the first area (110) and the boundary of the second area (120) are staggered to form a plurality of fourth mesh holes (160), the fourth mesh holes (160) are filled with photosensitive paste, and the second mesh holes (140) and the third mesh holes (150) are used to fill ink.

5. A method for preparing a screen printing plate structure, characterized in that: The method comprises: Obtaining a first screen, wherein the mesh of the first screen has a photosensitive slurry coating film on it; Covering the first screen with a film positive pattern, wherein the film positive pattern includes an outer ring portion and a hollow portion, wherein 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, and the first screen also includes a first area, which is an area of ​​the first screen except the second area; The first area includes a first mesh, and the first mesh is a mesh formed by interlacing mesh yarns on the first area; The second area includes a second mesh, the second mesh is a mesh formed by interlacing the mesh in the second area and the boundary of the second area, and the length of the mesh constituting the second mesh is greater than the length of the boundary; The first mesh is filled with the photosensitive paste coating film, and 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 between the mesh used to form the second mesh and the boundary, the first width is the aperture of the first mesh, and the straight line where the first width lies is parallel to the straight line where the second width lies.

6. The method according to claim 5, characterized in that The second area also includes third meshes, which are meshes formed by interlacing mesh yarns in the second area. In the direction of the straight line where the second width is located, between two parallel and nearest boundaries in the second area, the sum of the number of the second meshes and the third meshes is less than or equal to 2.

7. The method according to claim 5 or 6, characterized in that: The obtaining of the first screen plate comprises: Get the first mesh; The first mesh is coated with photosensitive slurry and dried.

8. A display substrate, characterized in that: The invention comprises a glass cover plate, wherein the glass cover plate is covered by the silk screen structure according to any one of claims 1 to 4.

9. A device for preparing a screen printing screen structure, characterized in that: The system comprises a processor and a memory, wherein the processor and the memory are connected, wherein the memory is used to store program codes, and the processor is used to call the program codes to execute the method as claimed in any one of claims 5 to 7.

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