Electroformed screen

Abstract

The utility model discloses a kind of electroformed screen, comprising: metal plate and peripheral net cloth, the metal plate includes printing area, hot melting area and the transition zone between the printing area and the hot melting area, mesh is equipped in the printing area, the hot melting area is fused with the peripheral net cloth, a plurality of force relief tangent is equipped in the transition zone, the force relief tangent is set in the transition zone parallel to the two sides of scraper moving direction. The scheme is deformed by force relief tangent to replace mesh, mesh will not be enlarged due to deformation, therefore, the grid line after printing meets product design requirement.

Description

Technical Field

[0001] This utility model relates to the field of electrode printing technology, specifically an electroforming screen printing plate. Background Technology

[0002] Electroforming stencils are high-precision metal stencils used in the manufacture of solar cells, primarily in the electrode printing process of photovoltaic cells. They employ advanced electroforming technology, electrolytically depositing metals (such as nickel and copper) to form an ultra-thin, high-precision mesh structure. This ensures that the conductive paste can be accurately printed onto the silicon wafer, resulting in efficient, low-loss electrode circuitry.

[0003] Electroforming screens, also known as fully open screens, have an open area ratio of ≥70%. Currently, the printing pass rate of electroforming screens cannot meet the needs of mass production. The main reason is that when the squeegee applies force to the electroforming screen, the mesh openings on the two edges of the screen perpendicular to the squeegee's movement direction deform and enlarge under the action of the two ends of the squeegee. This results in the corresponding grid lines of these edge mesh openings becoming thicker after printing, failing to meet design requirements. Utility Model Content

[0004] In order to overcome the defects in the prior art, this utility model provides an electroforming screen plate, which is used to solve the above problems.

[0005] This application discloses an electroforming screen, comprising: a metal plate and an outer mesh fabric. The metal plate includes a printing area, a hot-melt area, and a transition area between the printing area and the hot-melt area. The printing area has mesh openings. The hot-melt area is hot-melted to the outer mesh fabric. The transition area has multiple stress-relieving tangents, which are located on both sides of the transition area parallel to the direction of the scraper's movement.

[0006] Specifically, the multiple unloading tangents on the same side of the transition zone are arranged in multiple rows, each row including at least one unloading tangent, and the extension direction of each row of unloading tangents is the same as the extension direction of the mesh.

[0007] Specifically, the outer mesh fabric includes a first part connected to the hot melt zone, a second part connected to the mesh frame, and a third part between the first part and the second part, wherein the third part is hot melted with hot melt adhesive.

[0008] Specifically, the third part has pressure relief holes on both sides parallel to the scraper's moving direction.

[0009] Specifically, multiple first resistance structures are provided in the non-mesh areas within the printing area.

[0010] Specifically, the first resistance structure includes protrusions and / or grooves.

[0011] Specifically, the printing area is further provided with a second resistance structure surrounding the mesh, the second resistance structure being an annular groove.

[0012] Specifically, the metal plate is a steel plate.

[0013] Specifically, the outer mesh is a nylon mesh or a polyester mesh.

[0014] This utility model has at least the following beneficial effects:

[0015] In this embodiment, the electroforming screen has a metal plate with a transition zone and multiple stress-relieving tangents. During printing, these stress-relieving tangents can replace the mesh holes in the printing area and contact the two ends of the squeegee. In this way, the tension on the metal plate will be released at the stress-relieving tangents. That is, the stress-relieving tangents deform while the mesh holes in the printing area do not deform or enlarge. Therefore, the printed grid lines meet the product design requirements.

[0016] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the electroforming screen in an embodiment of this utility model;

[0019] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the distribution of the first resistance structure in an embodiment of this utility model.

[0021] The reference numerals in the above figures are as follows: 1. Metal plate; 11. Printing area; 111. Mesh; 112. First resistance structure; 113. Second resistance structure; 12. Hot melt zone; 13. Transition zone; 131. Unloading tangent; 2. Outer mesh; 21. Unloading hole; 3. Hot melt adhesive; 4. Mesh frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "fixing," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0026] Furthermore, the terms "first" and "second" are used only to distinguish between different terms in description and do not have any special meaning.

[0027] Combination Figure 1 As shown, the electroforming stencil in this embodiment mainly includes: a stencil frame 4, a metal plate 1, and an outer mesh 2. The inner side of the outer mesh 2 is connected to the metal plate 1, and its outer side is connected to the stencil frame 4. That is to say, the structure of the electroforming stencil from the inside to the outside is, in sequence, the metal plate 1, the outer mesh 2, and the stencil frame 4.

[0028] Combination Figure 1 and Figure 2 As shown, the metal plate 1 in this embodiment includes a printing area 11, a hot-melt area 12, and a transition area 13 between the printing area 11 and the hot-melt area 12. The printing area 11 has mesh openings 111 for the passage of slurry; the hot-melt area 12 is used for hot-melt connection with the surrounding mesh 2; and the transition area 13 has multiple stress-relieving tangents 131. Specifically, the transition area 13 is distributed around the printing area 11, including a region parallel to the squeegee movement direction and a region perpendicular to the squeegee movement direction. The stress-relieving tangents 131 are located in the region of the transition area 13 parallel to the squeegee movement direction, and are present on both sides of the printing area 11. These stress-relieving tangents 131 penetrate the upper and lower surfaces of the metal plate 1, allowing the metal material on both sides of the stress-relieving tangents 131 to separate under applied force.

[0029] Using the above solution, the electroforming screen of this embodiment has a metal plate 1 with a transition zone 13 and a plurality of stress-relieving tangents 131 in the transition zone 13. During printing, these stress-relieving tangents 131 can replace the mesh holes 111 in the printing area 11 and contact the two ends of the squeegee. In this way, the tension on the metal plate 1 will be released at the stress-relieving tangents 131, that is, the stress-relieving tangents 131 will deform while the mesh holes 111 in the printing area 11 will not deform or enlarge. Therefore, the printed grid lines meet the product design requirements.

[0030] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment, the transition zone 13 has multiple unloading tangents 131 on the same side arranged in multiple rows. Each row includes multiple unloading tangents 131, and the extending direction of the unloading tangents 131 in each row is the same as the extending direction of the mesh 111 in the printing area 11, both being parallel to the direction of the scraper movement. Preferably, the distance between the multiple unloading tangents 131 in each row is approximately equal to the distance between two adjacent meshes 111 in the same row.

[0031] In other embodiments, a row may contain only one unloading tangent 131, in which case the unloading tangent 131 is typically longer.

[0032] like Figure 1 As shown, the outer mesh 2 of this embodiment may include a first part that is hot-melt connected to the hot-melt zone 12 of the metal plate 1, a second part that is connected to the mesh frame 4, and a third part between the first and second parts. The third part is hot-melt bonded to the hot-melt adhesive 3, and after hot-melt bonding, the hot-melt adhesive 3 is located above the third part of the outer mesh 2 (or, the hot-melt adhesive 3 is located on the side of the outer mesh 2 facing the scraper). Further, the third part of the outer mesh 2 is provided with stress-relieving holes 21 (such as...). Figure 1 (As shown by the dotted line), the stress relief hole 21 is a perforation on the outer mesh 2. By setting the stress relief hole 21 on the third part of the outer mesh 2 and then applying hot melt adhesive 3 to the third part, the tension on the screen during printing can be further released.

[0033] like Figure 3 As shown, in this embodiment, the printing area 11 may also be provided with a plurality of first resistance structures 112, which are distributed in the non-mesh 111 areas of the printing area 11. The first resistance structure 112 may be a protrusion or a groove. Further, the printing area 11 is also provided with a second resistance structure 113, which is an annular groove around the mesh 111. By adopting the above scheme, the first resistance structure 112 and the second resistance structure 113 can slow down the movement speed of the squeegee and the paste, prolong the residence time of the paste in the printing area 11, and improve the throughput of the paste in the mesh 111.

[0034] In this embodiment, the metal plate 1 is a steel plate, and the outer mesh 2 is made of nylon mesh or polyester mesh.

[0035] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. An electroforming stencil, characterized in that, It includes: a metal plate and an outer mesh fabric. The metal plate includes a printing area, a hot-melt area, and a transition area between the printing area and the hot-melt area. The printing area has mesh holes. The hot-melt area is hot-melted to the outer mesh fabric. The transition area has multiple unloading tangents, which are located on both sides of the transition area parallel to the direction of the scraper's movement.

2. The electroforming screen according to claim 1, characterized in that, The multiple unloading tangents on the same side of the transition zone are arranged in multiple rows, each row including at least one unloading tangent, and the extension direction of each row of unloading tangents is the same as the extension direction of the mesh.

3. The electroforming screen according to claim 1, characterized in that, The outer mesh fabric includes a first part connected to the hot melt zone, a second part connected to the mesh frame, and a third part between the first part and the second part, wherein the third part is hot melted with hot melt adhesive.

4. The electroforming screen according to claim 3, characterized in that, The third part is provided with stress relief holes on both sides parallel to the scraper's movement direction.

5. The electroforming screen according to claim 1, characterized in that, Multiple first resistance structures are provided in the non-mesh areas within the printing zone.

6. The electroforming screen according to claim 5, characterized in that, The first resistance structure includes protrusions and / or grooves.

7. The electroforming screen according to claim 1, characterized in that, The printing area is also provided with a second resistance structure that surrounds the mesh, and the second resistance structure is an annular groove.

8. The electroforming screen according to claim 1, characterized in that, The metal plate is a steel plate.

9. The electroforming screen according to claim 1, characterized in that, The outer mesh is made of nylon or polyester.

Images