Printing screen

Abstract

Disclosed in the present disclosure is a printing screen, comprising a screen body and a surface treatment layer. The screen body comprises a printing side, a bottom side and several penetratingly-arranged grid lines, the printing side and the bottom side being arranged opposite each other. The surface treatment layer is arranged on the printing side and / or the bottom side or in the grid lines, the surface treatment layer comprising micro-nano structures or coating structures. The surface treatment layer is provided on the printing side and / or bottom side of the screen body, so that the resistance of a squeegee on the printing side during printing can be controlled, thereby controlling the amount of ink, improving the uniformity and ink discharge performance; the surface energy of the bottom side can be changed, improving the quality of the printing screen; the scratch resistance of the bottom side can be improved; and the hardness of a lower surface can be changed, improving the performance of the screen body.

Description

A printing screen

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to a Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202311873256.9 and invention name “A Printing Screen”. The entire contents of the patent application are incorporated into this disclosure by reference. Technical Field

[0003] The present disclosure relates to the technical field of screen printing, and in particular to a printing screen. Background Art

[0004] Printing screens are important tools in the electronics field. Taking the printing of solar cell electrodes as an example, slurry is poured onto the printing screen and moved on the printing screen with a scraper. The slurry is squeezed through the mesh holes on the printing screen and onto the solar cell, forming a corresponding pattern on the solar cell to form the electrode of the solar cell.

[0005] Traditional printing screens, due to the intersection of warp and weft lines, contain knots in the final electrode, which can affect the conductivity and conversion efficiency of the electrode film. To address these issues, existing printing screens employ a knot-free design using expanded metal meshes. However, expanded metal meshes present printing issues such as difficult squeegee control and uneven ink delivery. Furthermore, these meshes suffer from unstable performance and a short lifespan. Therefore, a new printing screen structure is urgently needed to address these existing technical issues. Summary of the Invention

[0006] Based on this, it is necessary to provide a printing screen to solve the above technical problems.

[0007] A technical solution of the present disclosure is:

[0008] A printing screen, comprising:

[0009] A screen body comprising a printing surface, a bottom surface, and a plurality of grid lines extending therethrough, wherein the printing surface and the bottom surface are arranged opposite to each other;

[0010] A surface treatment layer is provided on the printing surface and / or the bottom surface or in the grid lines, and the surface treatment layer includes a micro-nano structure or a coating structure.

[0011] In one embodiment, the surface treatment layer includes a micro-nano structure disposed on the printing surface, and the micro-nano structure includes a grid texture, an AG texture, a brushed texture, or a composite texture.

[0012] In one embodiment, the micro-nano structure is protruding and / or recessed on the printing surface.

[0013] In one embodiment, the screen body includes a first metal layer and a second metal layer stacked together, the printing surface is arranged on the first metal layer, the bottom surface is arranged on the second metal layer, and the micro-nano structure is recessed from the printing surface and the recess depth is less than or equal to the thickness of the first metal layer.

[0014] In one embodiment, the thickness range of the grid texture is 3μm-25μm or the depth range is 3μm-25μm, the average pore size of the grid of the grid texture is 10μm-200μm, and the width range of the mesh line is 5μm-150μm; the thickness of the AG texture does not exceed 25μm or the depth does not exceed 25μm, and the width range of the AG texture is 5μm-150μm; the thickness range of the brushed texture is 3μm-25μm or the depth range is 3μm-25μm, and the width range of the brushed texture is 5μm-150μm.

[0015] In one embodiment, the composite texture is a grid texture and an AG structure disposed on the grid texture, wherein the height of the AG structure ranges from 10 nm to 5 μm, and the width of the AG structure ranges from 50 nm to 50 μm.

[0016] In one embodiment, the grid lines are defined as extending along the Y direction, and the X direction intersecting the Y direction is defined as the printing direction; in the X direction, the micro-nano structure is provided with an adjustment portion for adjusting the resistance of the scraper during printing.

[0017] In one embodiment, in the Z direction perpendicular to the plane where the X direction and the Y direction are located, the depth range of the adjustment portion when it is concave is 3 μm-25 μm, and the thickness range of the adjustment portion when it is convex is 3 μm-25 μm.

[0018] In one embodiment, the adjusting portion is a pointed end pointing in the opposite direction to the X direction.

[0019] In one embodiment, the adjustment portion is in the shape of a line disposed at an angle to the X direction.

[0020] In one embodiment, the micro-nano structure is a grid texture, and the grid texture includes first grid lines and second grid lines that are arranged in a cross pattern, and the first grid lines and / or the second grid lines are arranged at an angle to the X direction.

[0021] In one embodiment, the angle range is 5°-85°.

[0022] In one embodiment, the surface treatment layer includes a micro-nano structure disposed on the bottom surface, and the micro-nano structure includes an AG texture.

[0023] In one embodiment, the surface treatment layer includes a coating structure disposed on the bottom surface, and the coating structure is a fluorine-containing layer, a softening layer, or a plating layer.

[0024] In one embodiment, the grid body includes a first metal layer and a second metal layer stacked together, the grid line includes a first wire groove located in the first metal layer and a second wire groove located in the second metal layer, the first wire groove and the second wire groove are overlapped and connected, the printing surface is set on the first metal layer, the bottom surface is set on the second metal layer, and the side walls of the first wire groove and / or the second wire groove are provided with a fluorine-containing layer or a plating layer.

[0025] The beneficial effects of the present disclosure include: providing a surface treatment layer on the printing surface and / or bottom surface of the screen printing plate body of the present disclosure, thereby controlling the resistance of the scraper on the printing surface during printing, controlling the amount of ink, and improving uniformity and ink delivery; modifying the surface energy of the bottom surface, thereby improving the quality of the printing screen; improving the scratch resistance of the bottom surface; and modifying the hardness of the bottom surface, thereby improving the performance of the screen body. The surface treatment layer provided on the screen body results in a high-performance printing screen, improving quality, extending lifespan, and enhancing printing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of a planar structure of a printing screen disclosed herein;

[0027] FIG2 is a schematic diagram of the cross-sectional structure of the printing screen of FIG1 ;

[0028] FIG3 is another schematic cross-sectional view of a printing screen disclosed herein;

[0029] FIG4 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0030] FIG5 is another schematic diagram of a planar structure of a printing screen disclosed herein;

[0031] FIG6 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0032] FIG7 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0033] FIG8 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0034] FIG9 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0035] FIG10 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0036] FIG11 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0037] FIG12 is another schematic cross-sectional view of a printing screen disclosed herein;

[0038] FIG13 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0039] FIG14 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0040] FIG15 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0041] FIG16 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0042] FIG17 is a schematic diagram of another cross-sectional structure of a printing screen disclosed herein;

[0043] FIG18 is another schematic diagram of the cross-sectional structure of a printing screen disclosed herein. DETAILED DESCRIPTION

[0044] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0045] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are for the purpose of describing specific embodiments only and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] The present disclosure discloses a printing screen, which includes a screen body and a surface treatment layer. The screen body includes a printing surface, a bottom surface and a plurality of grid lines arranged therethrough, and the printing surface and the bottom surface are arranged opposite to each other. The surface treatment layer is arranged on the printing surface and / or the bottom surface and / or in the grid lines, and the surface treatment layer includes a micro-nano structure and a coating structure. The surface treatment layer is arranged on the printing surface and / or the bottom surface of the screen body, which can control the resistance of the scraper on the printing surface during printing, control the amount of ink, improve uniformity and ink absorption; change the surface energy of the bottom surface, improve the quality of the printing screen; improve the anti-scratch ability of the bottom surface; change the hardness of the bottom surface, and improve the performance of the screen body. The screen body is provided with a surface treatment layer to obtain a high-performance printing screen, improve quality, increase lifespan, and improve printing effect.

[0048] In one embodiment, the surface treatment layer includes micro-nanostructures disposed on the printing surface. The micro-nanostructures include a grid texture, an AG texture, a brushed texture, or a composite texture. The micro-nanostructures disposed on the printing surface can control the resistance of the scraper during printing, thereby controlling the amount of ink and improving print quality. The micro-nanostructures are raised and / or recessed on the printing surface. The surface treatment layer may not be integrally disposed on the printing surface, for example, by coating or other methods. The surface treatment layer may also be integrally disposed on the printing surface, with the micro-nanostructures being integrally raised or recessed. A grid texture is a texture distributed in a grid pattern, with the grid lines being raised and / or recessed. An AG texture is a plurality of raised and / or recessed structures, with at least one of the parameters, such as height, depth, width, length, density, period, curvature, or cross-section, of the raised or recessed structures being randomly set. For example, an AG texture is formed by randomly setting the height, period, and curvature of the raised or recessed structures. A brushed texture is a brushed texture. A composite texture is a superposition of two textures, such as an AG structure on a grid texture, an AG structure on a brushed texture, an AG structure on an AG texture, a brushed texture on a grid texture, and so on. The AG structure is a number of raised and / or recessed structures, with at least one of the height, depth, width, length, density, period, curvature, and cross-section parameters of the raised or recessed structures being randomly set. The AG texture has a thickness of no more than 25 μm or a depth of no more than 25 μm, and a width of 5 μm to 150 μm. The AG structure has a height of 10 nm to 5 μm, and a width of 50 nm to 50 μm.

[0049] In one embodiment, the screen body includes a first metal layer and a second metal layer stacked together, with the printing surface disposed on the first metal layer and the bottom surface disposed on the second metal layer. The micro-nanostructure is recessed from the printing surface, with a depth less than or equal to the thickness of the first metal layer. The micro-nanostructure is groove-shaped and may be disposed through or non-through the first metal layer. The grooved micro-nanostructure disposed on the first metal layer provides excellent printing performance on the printing surface of the first metal layer, effectively controlling scraper resistance during printing, thereby controlling ink volume and improving print quality.

[0050] In one embodiment, in order to effectively control the resistance of the scraper, the thickness range of the grid texture is 3μm-25μm or the depth range is 3μm-25μm, the average pore size of the grid of the grid texture is 10μm-200μm, and the width range of the mesh line is 5μm-150μm; the thickness of the AG texture does not exceed 25μm or the depth range is not more than 25μm, and the width range of the AG texture is 5μm-150μm; the thickness range of the brushed texture is 3μm-25μm or the depth range is 3μm-25μm, and the width range of the brushed texture is 5μm-150μm.

[0051] In one embodiment, the composite texture is a grid texture and an AG structure arranged on the grid texture. The thickness range of the grid texture is 3μm-25μm or the depth range is 3μm-25μm, the average pore size of the grid of the grid texture is 10μm-200μm, and the width range of the mesh line is 5μm-150μm; the height range of the AG structure is 10nm-5μm, and the width range of the AG structure is 50nm-50μm, which can effectively control the resistance of the scraper during printing, so as to control the amount of ink and improve the printing quality.

[0052] In one embodiment, the grid line is defined as extending along the Y direction, and the X direction intersecting the Y direction is defined as the printing direction. In the X direction, the micro-nano structure is provided with an adjustment portion for adjusting the resistance of the scraper during printing. In the Z direction perpendicular to the plane where the X and Y directions are located, the thickness range of the adjustment portion is 3μm-25μm or the depth range is 3μm-25μm. The adjustment portion is arranged in the X direction during scraper printing and has a certain thickness in the Z direction, which can play a certain blocking role on the scraper, thereby adjusting the strength of the scraper and ensuring the strength, smoothness and uniformity of scraping ink.

[0053] In one embodiment, the adjustment portion is a tip portion pointing in the opposite direction to the X direction. The tip portion is conducive to blocking the scraper without restricting the scraper, thereby facilitating the adjustment.

[0054] In one embodiment, the adjustment portion is in the form of a line arranged at an angle to the X-direction. The adjustment portion can be a linear grid line, or can be a linear AG texture or a brushed texture. The linear adjustment portion is at an angle to the scraping direction of the scraper, and a preset adjustment effect can be achieved based on the angle.

[0055] In one embodiment, the micro-nano structure is a grid texture, and the grid texture includes a first grid line and a second grid line that are cross-arranged, and the first grid line and / or the second grid line are arranged at an angle to the X direction. Preferably, the angle range is 15°-75°. In one embodiment, the X axis is perpendicular to the Y axis, and within the coordinates of the X axis and the Y axis, the grid texture is tilted as a whole, and the first grid line and the second grid line are respectively tilted to the X axis. An intersection of the first grid line and the second grid line forms an adjustment portion pointing in the opposite direction of the X axis, and the first grid line and the second grid line forming the intersection are also adjustment portions, which have a good adjustment effect.

[0056] In one embodiment, the surface treatment layer includes a micro-nano structure provided on the bottom surface, and the micro-nano structure includes an AG texture. The AG texture is provided on the bottom surface to form a velvety surface on the bottom surface to play a role in scratch resistance and obtain a higher quality printing screen.

[0057] In one embodiment, the surface treatment layer includes a coating structure disposed on the bottom surface. The coating structure is a fluorine-containing layer, a softening layer, or a plating layer to improve the surface energy of the bottom surface and obtain a higher quality printing screen.

[0058] In one embodiment, the screen body includes a first metal layer and a second metal layer stacked together, the grid lines include a first groove in the first metal layer and a second groove in the second metal layer, the first groove and the second groove overlapping each other, the printing surface being located in the first metal layer and the bottom surface being located in the second metal layer. A fluorine-containing layer or plating is provided on the sidewalls of the first groove and / or the second groove to improve the surface energy of the first groove or the second groove, stabilize the structure, and thereby produce a high-quality printing screen.

[0059] The printing screen of the present disclosure is described below with reference to the accompanying drawings.

[0060] Referring to Figures 1 and 2, the present disclosure discloses a printing screen 100, which includes a screen body 101 and a surface treatment layer 102. The screen body 101 includes a first metal layer 1, a second metal layer 2 and grid lines. The first metal layer 1 and the second metal layer 2 are stacked. The screen body 101 includes a printing surface 11 located on the first metal layer 1 and a bottom surface 21 located on the second metal layer 2, and the printing surface 11 and the bottom surface 21 are arranged relative to each other. The grid lines include a first line groove 12 located through the first metal layer 1 and a second line groove 22 located through the second metal layer 2, and the first line groove 12 and the second line groove 22 are overlapped and connected to each other. The surface treatment layer 102 includes a micro-nano structure 3 provided on the printing surface 11. In this embodiment, the micro-nano structure 3 includes a grid texture 31 recessed from the printing surface 11. The grid texture 31 can control the resistance of the scraper (not shown) on the printing surface 11 during printing, thereby controlling the amount of ink and improving uniformity and ink delivery.

[0061] Continuing with Figures 1 and 2, the grid lines are defined as extending along the Y direction, and the printing direction is defined as the X direction. In this embodiment, the X direction is perpendicular to the Y direction, and the plane perpendicular to the X and Y directions is defined as the Z direction. The grid texture 31 includes first and second grid lines 311, 312 arranged in a crosswise manner. The grid texture 31 is arranged as a whole at an angle within the X and Y coordinates, with the first and second grid lines 311, 312 each being arranged at an angle to the X direction. Preferably, the angle range is 5°-85°. The intersection of the first and second grid lines 311, 312 pointing in opposite directions around the X direction is defined as an adjustment portion 313, and the first and second grid lines 311, 312 forming this intersection also serve as the adjustment portion. The adjustment portion 313 is a pointed tip pointing in the opposite direction of the X direction, and the first and second grid lines 311, 312 forming the intersection are linear adjustment portions arranged at an angle to the X direction. Providing the adjustment portion in the X direction provides effective resistance to the scraper, allowing for adjustment of the scraper during printing to ensure scraping quality. In order to effectively control the resistance of the scraper, the depth range of the grid texture 31 is less than or equal to the thickness of the first metal layer 1, preferably in the range of 3μm-25μm. Furthermore, the width range of the first grid line 311 is 5μm-150μm, the width range of the second grid line 312 is 5μm-150μm, and the average pore size of the grid of the grid texture 31 is 10μm-200μm; thus, it will not hinder the scraper and can effectively control the scraper resistance. The angles of several first grid lines 311 are the same or substantially the same, and the difference does not exceed 5%; the angles of several second grid lines 312 are the same or substantially the same, and the difference does not exceed 5%, so as to ensure the control effect.

[0062] Referring to Figure 2 , the depth of the grid texture 31 in the Z direction is equal to the thickness of the first metal layer 1 , meaning that the grid texture 31 is recessed from the printing surface 11 and extends through the first metal layer 1 . In other embodiments, referring to Figure 3 , the depth of the grid texture 32 in the Z direction is less than the thickness of the first metal layer 1 , meaning that the grid texture 32 is recessed from the printing surface 11 and does not extend through the first metal layer 1 . A surface treatment layer 102 formed by a micro-nanostructure 3 having a depth of 3 μm or greater, disposed on the printing surface 11, can control scraper resistance and improve printing quality. The micro-nanostructure 3 is recessed on the printing surface 11. In other embodiments, it can also be raised on the printing surface 11. As shown in Figure 4 , the grid texture 33 is raised on the printing surface 11 and can be formed on the printing surface 11 by printing, laser etching, spraying, coating, or embossing. The height of the raised grid texture 33 ranges from 3 μm to 25 μm, ensuring that it can interact with the scraper without interfering with its use and adjusting scraper resistance to improve printing quality. In other embodiments, the grid texture has both raised and recessed configurations.

[0063] Referring to FIG2 , the micro-nanostructure 3 is a grid texture 31; in other embodiments, the micro-nanostructure 3 is a brushed texture 34, as shown in FIG5 . The brushed texture 34 is tilted relative to the X-axis, and the angle with the X-axis ranges from 5° to 85°. The width ranges from 5μm to 150μm. It can be raised or recessed on the printing surface 11. When raised, the thickness ranges from 3μm to 25μm, and when recessed, the depth ranges from 3μm to 25μm. An adjustment portion 341 is formed at one end of the brushed texture 34, which also has a good adjustment effect. The width, length, and spacing of the brushed texture 34 are all tilted in the same direction. In other embodiments, the angle of the tilt direction does not differ by more than 5%. The brushed texture 34 can be raised and / or recessed on the printing surface 11. As shown in Figure 6 , the micro-nanostructure 3 is an AG texture 35. In this embodiment, the AG texture 35 is provided on the surface of the printing surface 11. The height, width, and spacing of the AG texture 35 are randomly arranged on the printing surface 11, and the AG texture 35 is arranged as a raised and / or recessed portion on the printing surface 11. The end of the AG texture 35 facing the opposite direction of the X direction is provided as an adjustment portion 351. The height of the AG texture does not exceed 25 μm, and the depth does not exceed 25 μm. The AG texture provided on the printing surface 11 can control the scraper resistance and improve printing quality.

[0064] Referring to Figure 7 , the surface treatment layer 102 is a micro-nanostructure 4 disposed on the bottom surface 21. The micro-nanostructure 4 includes an AG texture 41. The AG texture 41 is formed as raised and / or recessed portions on the bottom surface 21. The height and depth of the AG texture do not exceed 25 μm, forming a velvety surface on the bottom surface 21 to prevent scratches and improve quality.

[0065] Referring to Figure 8 , the surface treatment layer 102 comprises a micro-nanostructure, including an AG texture 36 on the printing surface and an AG texture 42 on the bottom surface. The AG texture 36 controls scraper resistance, while the AG texture 42 provides scratch resistance, improving quality. The AG texture 36 has a thickness of no more than 25 μm or a depth of no more than 25 μm, and a width ranging from 5 μm to 150 μm. In other embodiments, the AG texture 36 is an AG structure with a height ranging from 10 nm to 5 μm and a width ranging from 50 nm to 50 μm.

[0066] Referring to Figure 9 , the surface treatment layer 102 is a coating structure 51 disposed on the bottom surface 21. The coating structure 51 is a fluorine-containing layer or a softening layer, with a thickness ranging from 5 μm to 100 μm, to improve the surface energy of the bottom surface, thereby enhancing product quality. In other embodiments, the surface treatment layer 102 is a plating layer 51 disposed on the bottom surface 21, with a thickness ranging from 20 nm to 5 μm, to improve the bottom surface and enhance product quality. Referring to Figure 10 , the surface treatment layer 102 is a coating structure 52 or plating layer 52 disposed on the printing surface 11. In other embodiments, please refer to Figure 11, the surface treatment layer 102 is simultaneously provided on the printing surface 11 and the bottom surface 21, and can be a fluorine-containing layer, a softening layer or a coating; please refer to Figure 12, the surface treatment layer 102 is provided in the grid line, that is, the side wall of the first line groove 12 and the side wall of the second line groove 22, so as to improve the surface energy and improve the line groove quality; please refer to Figure 13, the surface treatment layer 102 is provided on the printing surface 11, the first line groove 12, the bottom surface 21, and the second line groove 22 to comprehensively improve the surface and improve the quality of the printing screen.

[0067] Referring to Figure 14 , the surface treatment layer 102 includes a grid texture 37 provided on the printing surface 11 and a coating 53 provided on the bottom surface 21. The grid texture 37 controls scraper resistance, and the coating 53 improves surface energy, resulting in a higher-quality printing screen and improved printing quality. Referring to Figure 15 , the surface treatment layer includes a grid texture 38 provided on the printing surface 11, a coating 54 provided on the sidewalls of the first and second linear grooves 12, 22, and a fluorine-containing layer 55 provided on the bottom surface 21. Referring to Figure 16 , the surface treatment layer includes a grid texture 39 provided on the printing surface 11, a coating 56 provided on the grid texture 39, the printing surface 11, the first and second linear grooves 12, 22, and the bottom surface, and so on. The surface treatment layer is arranged on at least one of the printing surface 11, the side wall of the first line groove 12, the side wall of the second line groove 22, and the bottom surface to achieve surface treatment functions such as controlling scraper resistance, improving surface energy, scratch resistance, and softening, thereby improving printing quality, increasing product life and quality, and reducing costs.

[0068] Referring to Figure 17, the surface treatment layer 102 includes a composite texture provided on the printing surface, and the composite texture includes a grid texture 61 and an AG structure 62 provided on the grid texture 61. The depth of the grid texture 61 ranges from 3μm to 25μm, the average pore size of the grid of the grid texture 61 ranges from 10μm to 200μm, and the width of the mesh line ranges from 5μm to 150μm; the height of the AG structure ranges from 10nm to 5μm, and the width of the AG structure ranges from 50nm to 50μm. The grid lines of the grid texture 61 are arranged perpendicularly or non-perpendicularly to each other, and the grid lines are arranged at an angle with the X direction, the angle ranges from 0-90°, and the width of the grid lines is roughly or inconsistently arranged. The AG structure 62 is provided on the surface of the grid texture 61. In other embodiments, the AG structure can be provided on the surface of the grid texture 61 and on the sidewalls and mesh of the grid lines. The AG structure is uniformly distributed, regionally distributed, or locally distributed. It can achieve the surface treatment functions of controlling scraper resistance, improving surface energy, anti-scratch, softening, etc., thereby improving printing quality, increasing product life, strength, toughness and quality, and reducing costs.

[0069] Referring to Figure 18 , the surface treatment layer includes a composite texture comprising a grid texture 63 on the printing surface and an AG structure 64 formed on the grid texture 63. The surface treatment layer also includes a coating 65 formed on the sidewalls and bottom of the first and second wire grooves. This achieves surface treatment functions such as controlling scraper resistance, increasing surface energy, preventing scratches, and softening the surface, thereby improving printing quality, enhancing product lifespan, strength, toughness, and quality, while reducing costs.

[0070] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are described in detail above in conjunction with the accompanying drawings. In the above description, many specific details are set forth in order to fully understand the present disclosure. However, the present disclosure can be implemented in many other ways different from those described above, and those skilled in the art can make similar improvements without violating the connotation of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed above. In addition, the various technical features of the embodiments described above can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A printing stencil, characterized in that, It includes: A screen printing plate body, which includes a printing surface, a bottom surface, and a plurality of grid lines penetrating therethrough, and the printing surface and the bottom surface are oppositely arranged; A surface treatment layer, which is disposed on the printing surface and / or the bottom surface or within the grid lines, and the surface treatment layer includes a micro-nano structure or a coating structure.

2. A printing screen according to claim 1, characterized in that, The surface treatment layer includes a micro-nano structure disposed on the printing surface, and the micro-nano structure includes a grid texture, an AG texture, a wire drawing texture, or a composite texture.

3. A printing screen according to claim 2, characterized in that, The micro-nano structure protrudes and / or recesses from the printing surface.

4. A printing screen according to claim 2, characterized in that, The screen printing plate body includes a first metal layer and a second metal layer stacked, the printing surface is disposed on the first metal layer, the bottom surface is disposed on the second metal layer, and the micro-nano structure is recessed from the printing surface and the recessed depth is less than or equal to the thickness of the first metal layer.

5. A printing screen according to claim 2, characterized in that, The thickness range of the grid texture is 3μm - 25μm or the depth range is 3μm - 25μm, the average pore diameter of the grid of the grid texture is 10μm - 200μm, and the width range of the wire is 5μm - 150μm; the thickness of the AG texture does not exceed 25μm or the depth does not exceed 25μm, and the width range of the AG texture is 5μm - 150μm; the thickness range of the wire drawing texture is 3μm - 25μm or the depth range is 3μm - 25μm, and the width range of the wire drawing texture is 5μm - 150μm.

6. A printing screen according to claim 2, wherein, The composite texture is a grid texture and an AG structure disposed on the grid texture, the height range of the AG structure is 10nm - 5μm, and the width range of the AG structure is 50nm - 50μm.

7. A printing screen according to claim 2, characterized in that, The grid lines are defined to extend along the Y direction, the printing direction is the X direction, and the X direction and the Y direction are crosswise arranged; in the X direction, the micro-nano structure is provided with an adjustment portion for adjusting the resistance of the squeegee during printing.

8. A printing screen according to claim 7, characterized in that In the Z direction perpendicular to the plane where the X direction and the Y direction are located, when the adjustment portion is a recess, the depth range is 3μm - 25μm, and when the adjustment portion is a protrusion, the thickness range is 3μm - 25μm.

9. A printing screen according to claim 7, characterized in that, The adjustment portion is a pointed end portion pointing in the opposite direction of the X direction.

10. A printing screen according to claim 7, characterized in that, The adjustment portion is in a linear shape arranged at an angle with the X direction.

11. A printing screen according to claim 2, characterized in that, The micro-nano structure is a grid texture, and the grid texture includes a first grid line and a second grid line arranged crosswise, and the first grid line and / or the second grid line are arranged at an angle with the X direction.

12. A printing screen according to claim 11, wherein, The angle range is 5° - 85°.

13. A printing screen according to claim 1, characterized in that, The surface treatment layer includes a micro-nano structure disposed on the bottom surface, and the micro-nano structure includes an AG texture.

14. A printing screen according to claim 1, characterized in that, The surface treatment layer includes a coating structure disposed on the bottom surface, and the coating structure is a fluorine-containing layer, a softening layer, or a plating layer.

15. A printing screen according to claim 1, characterized in that, The screen printing plate body includes a first metal layer and a second metal layer stacked, the grid lines include a first wire groove located in the first metal layer and a second wire groove located in the second metal layer, the first wire groove and the second wire groove are overlapped and communicated, the printing surface is disposed on the first metal layer, the bottom surface is disposed on the second metal layer, and a fluorine-containing layer or a plating layer is provided on the side wall of the first wire groove and / or the second wire groove.

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