Screen printing plate
By designing a target area with open spaces and ink holes on the printing screen, the problem of insufficient printing position accuracy was solved, high-quality printing of solar cell electrodes was achieved, and the conversion efficiency of the cell was improved.
Patent Information
- Application Number
- CN202423218415.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing printing screens lack sufficient positional accuracy when printing solar cell electrodes, resulting in poor printing quality and affecting the conversion efficiency of solar cells.
Design a printing screen comprising a first metal layer, a second metal layer, grid lines, and positioning points. The positioning points have a target area with open space and an exposed ink outlet. The ink outlet has a duty cycle of greater than or equal to 10% in the target area to ensure accurate positioning.
Precise positioning is achieved through high-quality target points, which improves printing quality and thus enhances the conversion efficiency of solar cells.
Smart Images
Figure CN223559262U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of screen printing, and in particular to a printing screen. BACKGROUND
[0002] The printing screen is an important tool in the electronic field. For example, in printing the electrode of a solar cell, paste is poured on the printing screen, and the paste is moved on the printing screen by a squeegee, so that the paste is extruded through the screen holes of the printing screen to the cell silicon wafer to form a corresponding pattern on the cell silicon wafer, thereby forming the electrode of the solar cell. As an important step in the production of solar cells, the printing quality of the electrode of the solar cell has a great influence on the performance of the final solar cell. The position accuracy during printing is an important factor affecting the printing quality. During printing, the printing screen and the cell silicon wafer need to be aligned, so that the silver paste is printed on the predetermined position of the cell silicon wafer, and if secondary or more than secondary overprinting is required, no misalignment should occur, otherwise the printing quality will be affected, resulting in problems such as low conversion efficiency of the solar cell. Therefore, it is urgent to provide a printing screen with a new structure to solve the technical problems in the prior art. SUMMARY
[0003] Therefore, it is necessary to provide a printing screen to solve the above technical problems.
[0004] One technical solution of the present application is a printing screen, which comprises a first metal layer, a second metal layer, a grid line and a positioning point, wherein the first metal layer and the second metal layer are stacked; the grid line comprises a first line groove penetrating the first metal layer and a second line groove penetrating the second metal layer, the first line groove and the second line groove are correspondingly arranged and interconnected; the positioning point comprises a target area with a gap in the first metal layer and an ink feeding hole exposed to the gap and located in the second metal layer, wherein the area ratio of the ink feeding hole to the target area is greater than or equal to 10%.
[0005] In one embodiment, the positioning point is provided with an ink leakage area and a non-ink leakage area corresponding to the target area in the second metal layer, and the ink feeding hole is arranged in the ink leakage area.
[0006] In one embodiment, the ink leakage area is distributed with a grid, and the mesh of the grid is arranged as the ink feeding hole.
[0007] In one embodiment, the aperture of the ink feeding hole is 5-90 μm, and the line width of the grid is 5-15 μm.
[0008] In one embodiment, the ink leakage area is in the shape of a circular ring, a circle or a cross.
[0009] In one embodiment, the ink holes are distributed in a fan shape along the circular ring to form the ink leakage area.
[0010] In one embodiment, the non-ink leakage area corresponds to the non-leakage part of the target area, and / or the non-ink leakage area is not provided with ink holes.
[0011] In one embodiment, the target area is circular and entirely hollow, and the ink leakage area is annular or circular, and the radius of the target area is greater than the outer radius of the ink leakage area by 0-120 μm.
[0012] In one embodiment, the target area is circular and includes a solid inner circle and an annular hollow outside the inner circle, and the ink leakage area is annularly distributed in the annular hollow.
[0013] In one embodiment, the first metal layer is recessed and distributed with a grid texture, and the extension direction of the grid lines of the grid texture intersects the extension direction of the grid lines; the second metal layer is provided with a soft layer, and the soft layer is provided with an opening corresponding to the grid lines, and the width of the opening is greater than the width of the grid lines.
[0014] The beneficial effects of the present application: by setting the target area with hollow and the ink holes exposed to the hollow, a higher quality target point can be formed, precise positioning is achieved, the printing quality is ensured, and the conversion efficiency of the solar cell is improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a schematic diagram of the planar structure of a printing screen plate of the present application;
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure along Figure 1 A-A' line;
[0017] Figure 3 It is a schematic diagram of a positioning point; Figure 1
[0018] Figure 4 It is a schematic diagram of another positioning point of a printing screen plate of the present application;
[0019] Figure 5 It is a schematic diagram of another positioning point of a printing screen plate of the present application;
[0020] Figure 6 It is a schematic diagram of another positioning point of a printing screen plate of the present application;
[0021] Figure 7 It is a schematic diagram of another positioning point of a printing screen plate of the present application;
[0022] Figure 8 Fig. 2 is a magnified view of another positioning point of a printing screen plate according to the present application;
[0023] Figure 9 Fig. 2 is a magnified view of another positioning point of a printing screen plate according to the present application; DETAILED DESCRIPTION
[0024] For the purpose of promoting an understanding of the principles of the application, reference will now be made to the embodiments illustrated in the drawings. It is expressly understood that the drawings are presented for the purpose of illustration and description only and are not intended as a definition of the limits of the application. As illustrated in the accompanying drawings, the application can be implemented in a variety of different forms and is not limited to the embodiments set forth herein; instead, the embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
[0025] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "left", "right" and the like are merely used for the purpose of illustration and description and are not intended to limit the present application.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0027] The utility model discloses a kind of printing screen plate, it includes first metal layer, second metal layer, grid line and positioning point, first metal layer and second metal layer are stacked arrangement. Grid line includes first wire slot being set through in first metal layer and second wire slot being set through in second metal layer, first wire slot and second wire slot are correspondingly arranged and mutually communicated. Positioning point includes target area located in first metal layer and having leak and ink hole exposed to leak and located in second metal layer.Wherein, the duty cycle of ink hole in target area is greater than or equal to 10%.By setting target area with leak and ink hole exposed to leak, relatively high quality target point can be formed, accurate positioning is realized, printing quality is ensured, to improve the conversion efficiency of solar cell.
[0028] In one embodiment, the duty cycle of the ink hole in the target area is greater than or equal to 15%, 20%, 25%, 30%, 40% or 50%. The duty cycle of the ink hole in the target area is less than or equal to 80%.
[0029] In one embodiment, the printing screen plate comprises one, two or more positioning points, and the positioning points are evenly distributed.
[0030] In one embodiment, the positioning points are provided with ink leakage areas and non-ink leakage areas corresponding to the target area in the second metal layer, and the ink supply holes are arranged in the ink leakage areas.
[0031] In one embodiment, the ink leakage areas are distributed with a grid, and the grid holes are arranged as the ink supply holes. The diameter of the ink supply holes is 5-90 μm, and the line width of the grid is 5-15 μm to ensure the smoothness of ink supply. In one embodiment, the ink leakage areas are in the shape of a circular ring, a circle or a cross. The grid distribution is in the shape of a circular ring, a circle or a cross. The target points formed are in the shape of a circular ring, a circle or a cross, and the target points are evenly distributed on the surface of the shape or in the form of wave points. The shape is clear, the positioning is accurate, and the printing quality is improved.
[0032] In one embodiment, the ink supply holes are in the shape of a fan and are arranged in the ink leakage areas in the form of a circular ring. That is, the ink leakage areas are in the shape of a circular ring, the ink supply holes are in the shape of a fan and are arranged in the ink leakage areas in the form of a circular ring, and the target points formed are in the shape of a circular ring or are distributed along the circular ring. The shape is clear, the positioning is accurate, and the printing quality is improved.
[0033] In one embodiment, the non-ink leakage areas correspond to the non-ink leakage spaces of the target area, and / or the non-ink leakage areas are not provided with ink supply holes to ensure that the non-ink leakage areas do not leak ink, so as to control the amount and shape of ink supply and obtain target points with higher quality.
[0034] In one embodiment, the target area is in the shape of a circle and is hollow as a whole, the ink leakage areas are in the shape of a circular ring or a circle, and the radius of the target area is greater than the outer radius of the ink leakage areas by 0-120 μm to improve the ink supply performance of the ink leakage areas.
[0035] In one embodiment, the first metal layer is provided with a grid texture in the form of recesses, the extension direction of the grid lines of the grid texture intersects the extension direction of the grid lines, the second metal layer is provided with a soft layer, and the soft layer is provided with openings corresponding to the grid lines, and the width of the openings is greater than the width of the grid lines. The grid texture can control the scraper and improve the ink supply performance. The soft layer can protect the silicon wafer of the solar cell and prevent the silicon wafer from being broken under stress during printing, thereby improving the printing quality.
[0036] The following will be described by taking the printing screen plate of the present application as an example.
[0037] Please refer to Figures 1 to 3The utility model discloses a kind of printing screen 100, it includes first metal layer 1, second metal layer 2, grid line 3 and positioning point 4.First metal layer 1 and second metal layer 2 are stacked arrangement.Grid line 3 includes first line groove 31 being set through first metal layer 1 and second line groove 32 being set through second metal layer 2.First line groove 31 and second line groove 32 are correspondingly arranged and mutually communicated, and the center line of first line groove 31 and second line groove 32 is coincident arrangement.Positioning point 4 includes target area 41 located first metal layer 1 and having leakage and ink hole 42 exposed to leakage and located second metal layer 2.Wherein, the duty cycle of ink hole 42 in target area 41 is greater than or equal to 10%.By setting target area 41 with leakage and ink hole 42 exposed to leakage, higher quality target point can be formed, accurate positioning is realized, and printing quality is ensured, to improve the conversion efficiency of solar cell.
[0038] Positioning point 4 is provided with ink leakage area 43 and non-ink leakage area 44 in second metal layer 2 corresponding to target area 41, and ink hole 42 is arranged in ink leakage area 43.In this embodiment, ink leakage area 43 is distributed with a grid, and the mesh of the grid is arranged as ink hole 42.Preferably, the aperture of ink hole 42 is 5-90 μm, and the line width of the grid is 5-15 μm, which is beneficial to the smoothness of ink feeding.Target area 41 is circular and is entirely leaked.Target area 43 is annular, and the grid is arranged in it, and the mesh is arranged as ink hole 42.Non-ink leakage area 44 is arranged inside and outside the annular, that is, except the ink leakage area 43 of the annular, the other areas are non-ink leakage area 44, including a circular and an annular.The radius of target area 41 is greater than the outer radius of ink leakage area 60-120 μm.The formed target point is annular, has stable structure, better positioning effect, and is beneficial to improve the printing quality.
[0039] Other embodiments are disclosed in the specification. Figures 4-8 Other embodiments of positioning points are disclosed. Figure 4 Positioning point 5 includes target area 51 and ink hole 52.Positioning point 5 is different from positioning point 4 in that the radius of target area 51 can be equal to the outer radius of ink leakage area 53, that is, non-ink leakage area 54 is only arranged in the circular area at the center.
[0040] Other embodiments are disclosed in the specification. Figure 5 Positioning point 6 includes target area 61 and ink hole 62.Positioning point 6 is different from positioning point 4 in that target area 61 is not completely leaked, and it includes solid circle 611 at the center and annular leakage 612 outside the solid circle 611.In this embodiment, non-ink leakage area 64 corresponding to solid circle 611 can be arranged as solid or hollow, and even if non-ink leakage area 64 is arranged as hollow, it cannot feed ink due to solid circle 611, which will not affect the ink feeding of ink hole 62.
[0041] Other embodiments are disclosed in the specification. Figure 6Positioning point 7 comprises a target area 71 and ink holes 72. Positioning point 7 is different from positioning point 4 in that the ink leakage area 721 is circular, and a grid is arranged in the circular area, and the mesh forms the ink holes 72. The ink leakage area 73 is provided with a ring-shaped non-ink leakage area 74.
[0042] Please refer to Figure 7 Positioning point 8 comprises a target area 81 and ink holes 82. Positioning point 8 is different from positioning point 7 in that the ink leakage area 83 is arranged in the entire target area 81 without a non-ink leakage area.
[0043] Please refer to Figure 8 Positioning point 9 comprises a target area 91 and ink holes 92. Positioning point 9 is different from positioning point 4 in that the ink holes 92 are fan-shaped, a plurality of ink holes are arranged at intervals and distributed along the circumference to form a circular ring-shaped ink leakage area 93, forming a circular ring-shaped target point, the positioning effect is good, and the printing quality is improved.
[0044] Please refer to Figure 9 The utility model discloses another printing screen 200. The printing screen 200 is different from the printing screen 100 in that the printing screen 200 further comprises a grid texture 11 and a soft layer 21. The first metal layer 1 is recessed to form the grid texture 11, and the extension direction of the grid line of the grid texture 11 intersects the extension direction of the grid line 3. The soft layer 21 is arranged on the second metal layer 2, and the soft layer 21 is provided with an opening 211 corresponding to the grid line 3, and the width of the opening 211 is greater than the width of the grid line 3. The grid texture 11 can control the scraper and improve the ink transfer property. The soft layer 21 has a thickness ranging from 1 to 10 microns and a Mohs hardness ranging from 0.5 to 300. The soft layer 21 is a tin layer, an aluminum layer, a copper layer or a gold layer. The soft layer 21 can protect the silicon wafer of the solar cell and prevent the silicon wafer from being broken under stress during printing, thereby improving the printing quality.
[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail above in combination with the drawings. In the above description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from the above description, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited by the above disclosed specific embodiments. Moreover, each technical feature of the above described embodiments can be combined arbitrarily, and in order to make the description concise, each technical feature of the above described embodiments is not described in all possible combinations, however, as long as the combinations of these technical features do not exist, they should be considered as the scope of the present application.
[0046] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific and detailed manner, but should not be construed as limiting the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A printing screen, characterized in that The application relates to a metal layer structure, which comprises a first metal layer, a second metal layer, a gate line and a positioning point, wherein the first metal layer and the second metal layer are arranged in a stack; the gate line comprises a first line groove arranged through the first metal layer and a second line groove arranged through the second metal layer, the first line groove and the second line groove are arranged correspondingly and are communicated with each other; the positioning point comprises a target area located in the first metal layer and having a leakage space and an ink feeding hole exposed to the leakage space and located in the second metal layer, wherein the occupancy ratio of the ink feeding hole to the target area is greater than or equal to 10%.
2. The printing screen according to claim 1, characterized in that The positioning point is provided with an ink leakage area and a non-ink leakage area corresponding to the target area in the second metal layer, and the ink feeding hole is arranged in the ink leakage area.
3. The printing screen according to claim 2, characterized in that The ink leakage area is distributed with a grid, and the mesh of the grid is arranged as the ink feeding hole.
4. The printing screen according to claim 3, characterized in that The aperture of the ink feeding hole is 5-90 mu m, and the line width of the grid is 5-15 mu m.
5. The printing screen according to claim 3, characterized in that The ink leakage area is in a circular ring shape, a circular shape or a cross shape.
6. The printing screen according to claim 2, characterized in that The ink feeding hole is in a fan shape and is distributed in the circular ring to form the ink leakage area.
7. The printing screen according to claim 2, characterized in that The non-ink leakage area corresponds to the non-leakage space of the target area, and / or the non-ink leakage area is not provided with the ink feeding hole.
8. The printing screen according to claim 3, characterized in that The target area is in a circular shape and is entirely hollow, the ink leakage area is in a ring shape or a circular shape, and the radius of the target area is greater than the outer radius of the ink leakage area by 0-120 mu m.
9. The printing screen according to claim 3, characterized in that The target area is in a circular shape and comprises an inner solid circle and a ring-shaped leakage space outside the inner circle, and the ink leakage area is in a ring shape and is distributed in the ring-shaped leakage space.
10. The printing screen according to claim 1, characterized in that The first metal layer is provided with a grid texture in a concave distribution, and the extension direction of the grid line of the grid texture intersects with the extension direction of the gate line; a soft layer is arranged on the second metal layer, and the soft layer is provided with an opening corresponding to the gate line, and the width of the opening is greater than the width of the gate line.