A method for manufacturing a fully open metal mesh plate

Abstract

This invention relates to the field of precision printing screen manufacturing technology, specifically to a method for manufacturing a fully open metal screen, comprising: preparing a screen frame, a polyester mesh fabric, and a metal substrate; defining an effective printing area and a peripheral fixing area within the screen frame; stretching and fixing the polyester mesh fabric onto the screen frame, such that the portion of the polyester mesh fabric corresponding to the peripheral fixing area forms a load-bearing mesh fabric layer; using the metal substrate as a temporary supporting substrate, forming a fully open metal mesh fabric through photolithography and electroforming deposition, and setting the width compensation amount of the mask pattern according to the opening linewidth of the finished pattern and the subsequent nano-coating thickness; separating the fully open metal mesh fabric and bonding it with the load-bearing mesh fabric layer, and removing the polyester mesh fabric within the effective printing area; roughening the squeegee surface of the fully open metal mesh fabric, and forming a nano-coating on the squeegee surface and the inner wall of the pattern opening. The method separates the load-bearing structure and the pattern opening structure, and controls the coating thickness to correspond to the finished opening linewidth.

Description

Technical Field

[0001] This invention relates to the field of precision printing screen manufacturing technology, and specifically to a method for manufacturing a fully open metal screen. Background Technology

[0002] Fully open metal screens are widely used in the printing and forming of solar cell electrodes, electronic circuits, precision conductive patterns, and micro-functional layers. As the linewidth of printed patterns gradually decreases and the requirements for printing thickness and edge consistency increase, the screen not only needs to have stable tension support, but also needs to provide clear, continuous, and dimensionally stable pattern openings in the effective printing area to meet the accuracy requirements of fine-linewidth paste transfer and repeated printing processes.

[0003] Common technical routes include using polyester mesh or steel wire mesh as the load-bearing base, and forming an emulsion layer, metal sheet layer or composite printing layer on it, and then forming the printing pattern opening through exposure development, laser processing, etching or electroforming; there are also metal sheets or electroformed metal layers as the main body of the pattern opening, and then combining them with the outer frame or mesh structure to obtain a fully open or nearly fully open printing area. However, there are still some shortcomings: (1) Traditional warp and weft wires or connecting wires are prone to overlap with the thin line width pattern opening, which leads to local obstruction of the paste passage path and affects the continuity of the printing line shape; (2) When the metal pattern layer is combined with the load-bearing mesh, if the boundary between the effective printing area and the surrounding load-bearing area is not clear, it is easy to cause mutual interference between tension transmission and pattern opening formation; (3) After the subsequent surface coating treatment of some metal screens, the inner wall of the pattern opening will be reduced due to the coating thickness, which affects the consistency of the finished opening size; (4) The squeegee surface is in contact with the paste and squeegee for a long time. If the surface condition and coating adhesion condition are not controlled enough, it is easy to affect the edge condition of the pattern opening and the stability of repeated printing. Summary of the Invention

[0004] This invention provides a method for manufacturing a fully open metal mesh, aiming to address the problems raised in the background art by providing a manufacturing method that can integrate peripheral tension bearing, fully open metal pattern formation, opening size compensation, and squeegee surface treatment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for manufacturing a fully open metal mesh, comprising the following steps: S1. Prepare the screen frame, polyester mesh and metal substrate. Define the effective printing area and the peripheral fixing area within the screen frame. The effective printing area corresponds vertically to the pattern opening area of ​​the fully open metal mesh to be formed. S2. Lay out and fix the polyester mesh on the frame so that the part of the polyester mesh corresponding to the surrounding fixed area forms a load-bearing mesh layer. S3. Using a metal substrate as a temporary support substrate, a fully open metal mesh is formed on the metal substrate by photolithography and electroforming deposition. The mask pattern used for photolithography is set with a width compensation amount according to the opening line width of the finished pattern and the thickness of the subsequent nano-coating. The fully open metal mesh includes a pattern opening area and a peripheral metal area located outside the pattern opening area. S4. After separating the fully open metal mesh from the metal substrate, align and fix the peripheral metal area of ​​the fully open metal mesh with the load-bearing mesh layer, and remove the polyester mesh located in the effective printing area, so that the pattern opening in the effective printing area is surrounded by the metal area of ​​the fully open metal mesh surrounding the pattern opening. S5. Roughen the squeegee surface of the fully open metal mesh, and form a nano-coating on the roughened squeegee surface and the inner wall of the pattern opening to obtain a fully open metal mesh.

[0006] Furthermore, in step S1, the external dimensions of the mesh frame are 450mm×450mm, the flatness of the mesh frame before the polyester mesh is laid is ≤0.15mm, and the surfaces of the mesh frame in contact with the polyester mesh are successively treated with degreasing, drying and gluing.

[0007] Furthermore, in step S1, the outer boundary of the effective printing area is located outside the outermost graphic opening in the finished state of the fully open metal screen, and the peripheral fixing area is located between the outer boundary of the effective printing area and the inner edge of the screen frame.

[0008] Furthermore, in step S2, the warp or weft threads of the polyester mesh are parallel or perpendicular to a set of edges of the frame, the tension of the polyester mesh is 5-20N, and the load-bearing mesh layer is fixed to the peripheral fixing area by an annular adhesive layer located outside the effective printing area.

[0009] Furthermore, in step S3, a conductive seed layer is first formed on the metal substrate, then a photoresist layer is placed on the conductive seed layer, and after exposure and development according to the mask pattern, a metal deposition window is formed, and electroforming deposition is performed within the metal deposition window.

[0010] Furthermore, the opening linewidth of the finished pattern is 5-20μm, and the deviation of the opening linewidth is no more than ±1μm. The corresponding opening width in the mask pattern is the sum of the opening linewidth of the finished pattern and the cumulative compensation on both sides, which is 0.16-0.4μm.

[0011] Furthermore, in step S3, the fully open metal mesh is an electroformed nickel layer or an electroformed nickel alloy layer. The area of ​​the fully open metal mesh other than the pattern opening is a continuous metal area. The pattern opening extends through the thickness direction of the fully open metal mesh, and the strength of the fully open metal mesh is not less than 200 N / cm.

[0012] Furthermore, in step S4, a composite adhesive layer is set between the peripheral metal area of ​​the fully open metal mesh and the load-bearing mesh layer. The composite adhesive layer is continuously distributed around the effective printing area. The removal boundary of the polyester mesh is located outside the outermost graphic opening. After removing the polyester mesh located in the effective printing area, there are no warp or weft threads of the polyester mesh that overlap with any graphic opening in the effective printing area, nor are there any metal wires or metal connecting wires that cross any graphic opening.

[0013] Furthermore, in step S5, the roughening treatment area includes the metal surface of the fully open metal mesh between the pattern openings and the entrance edge of the pattern opening. The roughening treatment adopts one of micro-etching treatment, plasma treatment, laser scanning treatment or abrasive jet treatment. After the roughening treatment, the surface roughness Ra of the scraper surface is 0.05-0.8μm, and the inner wall of the pattern opening maintains a continuous metal boundary.

[0014] Furthermore, in step S5, the thickness of the nano-coating is 80-200 nm. The nano-coating includes an inorganic attachment sublayer in contact with the fully open metal mesh and an organic surface sublayer located outside the inorganic attachment sublayer. The inorganic attachment sublayer is a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer, and the organic surface sublayer is a silicone acrylate layer, a fluorosilicone modified acrylate layer, or a siloxane layer.

[0015] The present invention has the following beneficial effects: (1) In this invention, the portion of the polyester mesh fabric corresponding to the peripheral fixed area is formed into a load-bearing mesh fabric layer, and the effective printing area is aligned vertically with the graphic opening area of ​​the fully open metal mesh fabric to be formed. This allows the polyester mesh fabric to primarily bear the peripheral tension support function, rather than serving as a component of the graphic opening within the effective printing area. Consequently, the tension-bearing structure and the graphic opening structure of the screen are separated in region, preventing the warp or weft threads of the traditional mesh fabric from entering the corresponding positions of the fine-width graphic openings, and reducing the interference of the load-bearing structure on the path of the paste.

[0016] (2) In this invention, a metal substrate is used as a temporary support base. A fully open metal mesh is formed by photolithography and electroforming deposition. The fully open metal mesh includes a patterned opening area and a peripheral metal area located outside the patterned opening area. Simultaneously, after separating the fully open metal mesh from the metal substrate, the peripheral metal area of ​​the fully open metal mesh is aligned and fixed with the load-bearing mesh layer, and the polyester mesh located in the effective printing area is removed. This arrangement allows the patterned opening formation and the screen tension support to be undertaken by different areas, reducing the problem of mutual interference between the load-bearing mesh and the patterned opening in traditional composite screens.

[0017] (3) In the photolithography stage, the present invention sets the width compensation amount of the mask pattern according to the opening line width of the finished pattern and the thickness of the subsequent nano-coating. The coating thickness has been taken into account in the previous mask design, so that the nano-coating treatment and the opening size control of the finished pattern are in a corresponding relationship, and the pattern opening line width is avoided from deviating from the predetermined range after the coating is formed.

[0018] (4) The present invention roughens the scraper surface of the fully open metal mesh fabric. The roughened area includes the metal surface of the fully open metal mesh fabric between the pattern openings and the entrance edge of the pattern opening. As a result, the scraper contact area, the slurry entry area and the edge area of ​​the pattern opening all form an interconnected surface state.

[0019] (5) The present invention forms a nano-coating on the roughened scraper surface and the inner wall of the patterned opening, and the nano-coating includes an inorganic attachment sublayer and an organic surface sublayer. Thus, the nano-coating not only covers the scraper surface, but also extends to the inner wall of the patterned opening, so that the scraper working surface and the slurry passing boundary have a consistent surface treatment structure; at the same time, the layered cooperation of the inorganic attachment sublayer and the organic surface sublayer is conducive to forming a stable bonding relationship between the metal surface and the outer surface layer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the planar structure of the fully open metal mesh of the present invention; Figure 2 This is a schematic diagram of the manufacturing process of the fully open metal mesh plate of the present invention; Figure 3 This is a schematic diagram of the photolithography electroforming process; Figure 4 This is a schematic diagram of a composite structure consisting of a fully open metal mesh and a load-bearing mesh layer.

[0021] Marking instructions: 1. Frame; 2. Load-bearing mesh layer; 3. Fully open metal mesh; 4. Effective printing area; 5. Peripheral fixing area. Detailed Implementation

[0022] The technical solution of the present invention will be further described below with reference to embodiments. It should be understood that the following embodiments are only used to illustrate the implementation of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the technical concept of the present invention, those skilled in the art can make appropriate adjustments to the process parameters according to the actual screen specifications, printing graphic size and paste type.

[0023] Example 1 This embodiment provides a method for manufacturing a fully open metal mesh, including the following steps: S1. Prepare the screen frame, polyester mesh, and metal substrate. A high-precision screen frame with dimensions of 450mm × 450mm is used. Before laying the polyester mesh, the frame's flatness is checked to ensure it is no more than 0.15mm. The surfaces of the screen frame and the polyester mesh in contact are sequentially degreased, dried, and coated with adhesive to remove surface oil and moisture, forming a stable bonding base for subsequent screen laying. An effective printing area and a peripheral fixing area are defined within the screen frame. The effective printing area corresponds vertically to the opening area of ​​the fully open metal mesh to be formed, and the peripheral fixing area is located outside the effective printing area.

[0024] By dividing the area as described above, the load-bearing position of the polyester mesh and the patterned opening area of ​​the fully open metal mesh are spatially corresponding, providing a boundary basis for the subsequent removal of the polyester mesh within the effective printing area.

[0025] S2. Stretch and fix the polyester mesh fabric to the frame, ensuring that the portion of the polyester mesh fabric corresponding to the peripheral fixing area forms a load-bearing mesh layer. During stretching, ensure that the warp or weft threads of the polyester mesh fabric are parallel or perpendicular to one set of edges of the frame, and control the tension of the polyester mesh fabric to 5-20N. The polyester mesh fabric is fixed to the peripheral fixing area using a ring-shaped adhesive layer, located outside the effective printing area.

[0026] The load-bearing mesh layer primarily supports the tension of the screen, rather than serving as the boundary structure for the graphic openings within the effective printing area. By forming a load-bearing mesh layer in the portion of the polyester mesh corresponding to the surrounding fixed area, it is possible to maintain the overall tension of the screen while preventing the warp or weft threads of the polyester mesh from entering the corresponding positions of subsequent graphic openings.

[0027] S3. Using a metal substrate as a temporary support, a fully open metal mesh is formed on the metal substrate through photolithography and electroforming deposition. Specifically, a conductive seed layer is first formed on the metal substrate, and then a photoresist layer is placed on the conductive seed layer. A mask pattern is fabricated according to the target printing pattern, and the photoresist layer is exposed and developed according to the mask pattern to form a metal deposition window. The mask pattern used for photolithography has a width compensation amount set according to the opening linewidth of the finished pattern and the thickness of the subsequent nano-coating. The opening linewidth of the finished pattern is 5-20 μm, and the deviation of the pattern opening linewidth is no more than ±1 μm. The corresponding opening width in the mask pattern is the sum of the opening linewidth of the finished pattern and the cumulative compensation amount on both sides, which is 0.16-0.4 μm. Subsequently, electroforming deposition is performed within the metal deposition window to form a fully open metal mesh. The fully open metal mesh includes a patterned opening area and a peripheral metal area located outside the patterned opening area. The fully open metal mesh is an electroformed nickel layer or an electroformed nickel alloy layer. The area in the fully open metal mesh other than the patterned opening is a continuous metal area. The patterned opening runs through the thickness direction of the fully open metal mesh. The strength of the fully open metal mesh is not less than 200 N / cm.

[0028] In this embodiment, taking a target finished pattern opening linewidth of 10 μm as an example, the cumulative compensation amount on both sides is set to 0.24 μm. In other embodiments, when the target finished pattern opening linewidth is 5-20 μm, the cumulative compensation amount on both sides can be selected within the range of 0.16-0.4 μm. By pre-setting the width compensation amount during the photolithography stage, the change in opening size caused by the subsequent formation of the nano-coating on the inner wall of the pattern opening is offset, so that the opening of the finished pattern remains within the set linewidth range.

[0029] S4. After separating the fully open metal mesh from the metal substrate, align and fix the peripheral metal area of ​​the fully open metal mesh with the load-bearing mesh layer, and remove the polyester mesh located within the effective printing area. During the bonding and fixing process, a composite adhesive layer is placed between the peripheral metal area of ​​the fully open metal mesh and the load-bearing mesh layer, ensuring that the composite adhesive layer is continuously distributed around the effective printing area. When removing the polyester mesh, ensure that the removal boundary of the polyester mesh is located outside the outermost pattern opening.

[0030] After removing the polyester mesh fabric located within the effective printing area, there are no warp or weft threads of the polyester mesh fabric overlapping any graphic opening within the effective printing area, nor are there any metal wires or metal connecting wires crossing any graphic opening. Therefore, the graphic openings within the effective printing area are enclosed by the metal region surrounding the graphic opening within the fully open metal mesh fabric, and the paste is not obstructed by the polyester mesh fabric warp or weft threads, metal wires, or metal connecting wires when passing through the graphic opening.

[0031] S5. The squeegee surface of the fully open metal mesh is roughened, and a nano-coating is formed on the roughened squeegee surface and the inner wall of the pattern openings to obtain a fully open metal mesh. The roughening treatment area includes the metal surface of the fully open metal mesh between the pattern openings and the entrance edge of the pattern openings. The roughening treatment is performed by micro-etching; in other embodiments, plasma treatment, laser scanning treatment, or abrasive jet treatment may also be used. After roughening, the surface roughness Ra of the squeegee surface is controlled to be 0.05-0.8 μm, and the inner wall of the pattern openings maintains a continuous metal boundary. Subsequently, a nano-coating with a thickness of 80-200 nm is formed on the roughened squeegee surface and the inner wall of the pattern openings.

[0032] The nano-coating comprises an inorganic attachment sublayer in contact with the fully open metal mesh and an organic surface sublayer located outside the inorganic attachment sublayer. The inorganic attachment sublayer is a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer, and the organic surface sublayer is a silicone-containing acrylate layer, a fluorosilicone-modified acrylate layer, or a siloxane layer. In this embodiment, a silicon oxide layer is selected as the inorganic attachment sublayer, and a silicone-containing acrylate layer is selected as the organic surface sublayer. The total thickness of the nano-coating is controlled to be 120 nm. The roughening treatment provides an adhesion surface for the nano-coating. After the nano-coating is formed on the inner wall of the pattern opening, in conjunction with the aforementioned mask pattern width compensation, the linewidth of the finished pattern opening remains within the target range.

[0033] Comparative Example 1 This comparative example provides a method for manufacturing a fully open metal mesh. The basic steps are the same as in Example 1, except that in step S3, the mask pattern used for photolithography is not set with a width compensation amount according to the thickness of the subsequent nano-coating, but is directly made according to the opening line width of the finished pattern.

[0034] Comparative Example 2 This comparative example provides a method for manufacturing a fully open metal mesh. The basic steps are the same as in Example 1, except that in step S5, the scraper surface of the fully open metal mesh is not roughened, and a nano-coating is directly formed on the scraper surface and the inner wall of the pattern opening.

[0035] The fully open metal mesh sheets prepared in Example 1, Comparative Example 1, and Comparative Example 2 were tested. The testing content and methods are as follows: (1) Detection of graphic opening line width; The graphic openings at different positions in the effective printing area are observed using a scanning electron microscope. The graphic openings near the center area, near the edge area and in the middle transition area are selected for measurement. No less than 30 graphic openings are measured for each sample. The graphic opening line width and graphic opening line width deviation of the finished product are statistically analyzed. (2) Detection of occlusion in the effective printing area; use microscopic observation to check whether there are warp or weft threads of polyester mesh that overlap with any graphic opening in the effective printing area, as well as metal wires or metal connecting wires. (3) Scraper surface roughness and nano-coating thickness detection: The surface roughness Ra of the scraper surface was detected using a surface roughness meter. The nano-coating thickness was detected by cross-sectional observation to observe whether the nano-coating was formed on the scraper surface and the inner wall of the pattern opening; (4) Printing pattern status detection: Using the same paste and under the same conditions, print tests are conducted, and the continuity of the lines, edge status, and local breaks or thinning of the lines are recorded after printing.

[0036] The test results are shown in Tables 1 and 2.

[0037] Table 1. Test results of graphic openings and surface structure Table 2 Results of Printed Graphics Condition Test As shown in Table 1, the finished pattern opening linewidth of Example 1 is 10.2 μm, and the pattern opening linewidth deviation is ±0.6 μm, which can be controlled within the target deviation range. Comparative Example 1 did not set a width compensation amount based on the subsequent nano-coating thickness. Although the nano-coating thickness was close to that of Example 1, the finished pattern opening linewidth decreased to 9.7 μm, and the pattern opening linewidth deviation reached ±1.2 μm, indicating that the nano-coating changes the finished opening size after forming on the inner wall of the pattern opening. Example 1, by setting a width compensation amount in the mask pattern, pre-compensates the opening narrowing caused by the subsequent nano-coating, thereby keeping the finished pattern opening linewidth within the set range.

[0038] As can be seen from the occlusion of the effective printing area, no warp or weft threads of the polyester mesh fabric overlapping with any graphic opening were observed in Examples 1, 1, and 2, nor were any metal wires or metal connecting wires observed crossing any graphic opening. This indicates that by aligning and fixing the peripheral metal area of ​​the fully open metal mesh fabric with the load-bearing mesh layer and removing the polyester mesh fabric located within the effective printing area, the graphic opening within the effective printing area can be surrounded by the metal area surrounding the graphic opening in the fully open metal mesh fabric, structurally reducing the occlusion of the graphic opening by the warp and weft threads of the polyester mesh fabric, metal wires, or metal connecting wires.

[0039] As shown in Tables 1 and 2, in Example 1, a nano-coating was formed after roughening the squeegee surface. The squeegee surface Ra was 0.32 μm, the nano-coating thickness was 120 nm, the printed linewidth deviation was ±0.8 μm, the line shape was continuous, and the edges were relatively straight. In Comparative Example 2, no squeegee surface roughening was performed, and the squeegee surface Ra was only 0.02 μm. Although the nano-coating thickness was similar to that of Example 1, local unevenness appeared at the printed edges, and a few areas showed local thinning. Squeegee surface roughening treatment can improve the adhesion and distribution of the nano-coating in the squeegee contact area and at the edge of the pattern opening, maintaining a continuous metal boundary on the inner wall of the pattern opening while forming a more stable surface coating structure.

[0040] In summary, Example 1 uses a load-bearing mesh layer within the peripheral fixed area to bear the tension. A fully open metal mesh is formed by electroforming, and the polyester mesh in the effective printing area is removed, so that the pattern opening is surrounded by the metal area surrounding the pattern opening in the fully open metal mesh. At the same time, through the combination of mask pattern width compensation, squeegee surface roughening treatment, and nano-coating on the inner wall of the pattern opening, the line width of the finished pattern opening, surface condition, and printed pattern condition are kept within a relatively stable range.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A method of manufacturing a full open mesh screen, characterized by, Includes the following steps: S1. Prepare the screen frame, polyester mesh and metal substrate. Define the effective printing area and the peripheral fixing area within the screen frame. The effective printing area corresponds vertically to the pattern opening area of ​​the fully open metal mesh to be formed. S2. Lay out and fix the polyester mesh on the frame so that the part of the polyester mesh corresponding to the surrounding fixed area forms a load-bearing mesh layer. S3. Using a metal substrate as a temporary support substrate, a fully open metal mesh is formed on the metal substrate by photolithography and electroforming deposition. The mask pattern used for photolithography is set with a width compensation amount according to the opening line width of the finished pattern and the thickness of the subsequent nano-coating. The fully open metal mesh includes a pattern opening area and a peripheral metal area located outside the pattern opening area. The finished pattern opening line width is 5-20μm, and the deviation of the pattern opening line width is no more than ±1μm. The corresponding opening width in the mask pattern is the sum of the finished pattern opening line width and the cumulative compensation on both sides, and the cumulative compensation on both sides is 0.16-0.4μm. S4. After separating the fully open metal mesh from the metal substrate, align and fix the peripheral metal area of ​​the fully open metal mesh with the load-bearing mesh layer, and remove the polyester mesh located in the effective printing area, so that the pattern opening in the effective printing area is surrounded by the metal area of ​​the fully open metal mesh surrounding the pattern opening. S5. Roughen the squeegee surface of the fully open metal mesh, and form a nano-coating on the roughened squeegee surface and the inner wall of the pattern opening to obtain a fully open metal mesh. The roughening treatment area includes the metal surface of the fully open metal mesh between the pattern openings and the entrance edge of the pattern opening. The roughening treatment adopts one of the following methods: micro-etching treatment, plasma treatment, laser scanning treatment or abrasive jetting treatment. After the roughening treatment, the surface roughness Ra of the scraper surface is 0.05-0.8μm, and the inner wall of the pattern opening maintains a continuous metal boundary. The thickness of the nano-coating is 80-200 nm. The nano-coating includes an inorganic attachment sublayer in contact with the fully open metal mesh and an organic surface sublayer located outside the inorganic attachment sublayer. The inorganic attachment sublayer is a silicon oxide layer, a titanium oxide layer or an aluminum oxide layer, and the organic surface sublayer is a silicone acrylate layer, a fluorosilicone modified acrylate layer or a siloxane layer.

2. The method for manufacturing a fully open metal mesh according to claim 1, characterized in that, In step S1, the outer dimensions of the mesh frame are 450mm×450mm, the flatness of the mesh frame before the polyester mesh is laid is ≤0.15mm, and the surfaces of the mesh frame in contact with the polyester mesh are successively treated with degreasing, drying and gluing.

3. The method for manufacturing a fully open metal mesh according to claim 1, characterized in that, In step S1, the outer boundary of the effective printing area is located outside the outermost graphic opening in the finished state of the fully open metal screen, and the peripheral fixing area is located between the outer boundary of the effective printing area and the inner edge of the screen frame.

4. The method for manufacturing a fully open metal mesh according to claim 1, characterized in that, In step S2, the warp or weft threads of the polyester mesh are parallel or perpendicular to a set of edges of the frame. The tension of the polyester mesh is 5-20N. The load-bearing mesh layer is fixed to the peripheral fixing area by an annular adhesive layer, which is located outside the effective printing area.

5. The method for manufacturing a fully open metal mesh according to claim 1, characterized in that, In step S3, a conductive seed layer is first formed on the metal substrate, then a photoresist layer is placed on the conductive seed layer, and after exposure and development according to the mask pattern, a metal deposition window is formed, and electroforming deposition is performed in the metal deposition window.

6. The method for manufacturing a fully open metal mesh according to claim 1, characterized in that, In step S3, the fully open metal mesh is an electroformed nickel layer or an electroformed nickel alloy layer. The area of ​​the fully open metal mesh other than the pattern opening is a continuous metal area. The pattern opening extends through the thickness direction of the fully open metal mesh, and the strength of the fully open metal mesh is not less than 200 N / cm.

7. The method for manufacturing a fully open metal mesh according to claim 1, characterized in that, In step S4, a composite adhesive layer is set between the peripheral metal area of ​​the fully open metal mesh and the load-bearing mesh layer. The composite adhesive layer is continuously distributed around the effective printing area. The removal boundary of the polyester mesh is located outside the outermost graphic opening. After removing the polyester mesh located in the effective printing area, there are no warp or weft threads of the polyester mesh that overlap with any graphic opening in the effective printing area, nor are there any metal wires or metal connecting wires that cross any graphic opening.

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