Master grid, screen assembly and solar cell

Abstract

The utility model discloses a main grid screen version, it includes the bearing layer and the ink supply layer of laminated setting. Bearing layer is provided with a plurality of main grid appearance, and main grid appearance extends along the first direction, and a plurality of main grid appearance is arranged at intervals along the second direction crossing with the first direction, and main grid appearance includes the grid hole distributing in main grid appearance, and the grid hole is set through bearing layer, and forms the ink bridge between adjacent grid hole, and the ink supply layer includes the main grid ink supply line set through, and main grid ink supply line is adapted with main grid appearance, and main grid ink supply line extends along the second direction and is set up with the grid hole intercommunication, strengthens the strength of main grid screen version, improves the life of main grid screen version, promotes the ink performance, improves the printing quality, reduces the cost. In addition, the utility model discloses a screen assembly and a solar cell piece.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a main grid, grid module and solar cell. Background Technology

[0002] Printing screens are an important tool for printing electrodes on solar cells. The printing screen is filled with paste, and a squeegee is used to move the paste on the screen, so that the paste is squeezed through the mesh of the printing screen onto the solar cell, forming a corresponding pattern on the solar cell to form the electrodes of the solar cell.

[0003] Conventional solar cells utilize a screen printing process to print fine grid electrodes and main grid electrodes on their surface. The fine grid electrodes collect the current generated after sunlight exposure, while the main grid electrodes collect the current from the fine grid electrode lines. The screen printing process uses a fine grid screen to print the fine grid electrodes and a main grid screen to print the main grid electrodes. However, prolonged continuous printing on the main grid screen can lead to wear, tear, and other damage that renders the printed surface unusable, severely hindering the control and development of solar cell manufacturing costs. Therefore, improving the lifespan of the main grid screen is of paramount importance. Summary of the Invention

[0004] Therefore, it is necessary to provide a new main grid, grid assembly, and solar cell to solve the above-mentioned technical problems.

[0005] One technical solution of this utility model is: a main grid screen, comprising a carrier layer and an ink layer stacked together, wherein the carrier layer has a printing surface and the ink layer has a printing substrate, the printing surface and the printing substrate are disposed opposite to each other; the carrier layer has a plurality of main grid morphologies, the main grid morphologies extending along a first direction, the plurality of main grid morphologies being arranged at intervals along a second direction intersecting the first direction, each main grid morphology including a plurality of grid holes distributed within the main grid morphology, the grid holes penetrating the carrier layer, and ink bridges forming between adjacent grid holes; the ink layer includes penetrating main grid ink lines, the main grid ink lines being adapted to the main grid morphologies, the main grid ink lines extending along the second direction and communicating with the grid holes.

[0006] In one embodiment, the grid holes include fence holes, which extend along a first direction and are spaced apart along a second direction, with the ink-passing bridge formed between adjacent fence holes; the length of the fence holes ranges from 200μm to 2000μm, the width of the fence holes ranges from 50μm to 500μm, and the width of the ink-passing bridge ranges from 5μm to 30μm.

[0007] In one embodiment, the fence hole is elongated and its ends are right-angled, chamfered, or arc-shaped.

[0008] In one embodiment, the grid holes include mesh holes, and the mesh lines between adjacent mesh holes form ink bridges. The diameter of the mesh holes ranges from 50μm to 500μm, and the width of the ink bridges ranges from 5μm to 30μm.

[0009] In one embodiment, the main grid morphology includes a main line extending along a second direction and pads spaced apart on the main line, wherein grid holes are distributed within the main line and the pads.

[0010] In one embodiment, both the main line and the pad are provided with mesh holes, and the mesh holes in the main line and the mesh holes in the pad are connected; or, the main line is provided with fence holes, the pad is provided with mesh holes, and the fence holes extend into the pad.

[0011] In one embodiment, the main grid morphology further includes solder feet disposed on both sides of the pad, wherein the solder feet are provided with grid holes connected to the grid holes in the pad or with fence holes extending to the grid holes in the pad.

[0012] In one embodiment, the main grid morphology further includes a harpoon portion located at the end of the main line. The harpoon portion includes a base and a fork portion extending from the base. The base is provided with a grid hole, and the fork portion is provided with a grid hole connected to the grid in the base or a fence hole extending to the grid hole in the base.

[0013] In one embodiment, the harpoon portion further includes ears located on both sides of the base, the ears being provided with mesh holes connected to the mesh holes in the base or with fence holes diffracted to the mesh holes in the base.

[0014] In one embodiment, the main grid screen further includes a second main grid shape, the second main grid shape including a plurality of line groups arranged at intervals along a second direction, each line group including a plurality of grid holes disposed through the bearing layer, the ink layer including a plurality of ink down lines disposed through the layer, the ink down lines being adapted to the line groups, the ink down lines extending along a first direction and communicating with the grid holes.

[0015] In one embodiment, the end of the ink-down line is right-angled, chamfered, or arc-shaped, or the ink-down line as a whole is humerus-shaped.

[0016] In one embodiment, the main grid screen further includes a third main grid shape, which is a side line disposed at the edge and extending along a second direction. The third main grid shape includes a plurality of grid holes penetrating the bearing layer. The ink layer includes an ink-down edge line that extends through the layer and communicates with the grid holes.

[0017] In one embodiment, the carrier layer is a metal layer or an alloy layer; the ink layer is a metal layer or a polymer layer.

[0018] In one embodiment, the carrier layer and the ink layer are disposed in separate layers, or the carrier layer and the ink layer are disposed integrally.

[0019] This utility model also discloses a screen printing assembly, which includes a fine grid screen and a main grid screen as described above. The fine grid screen includes a plurality of fine grid lines, which extend along a first direction and are spaced apart along a second direction.

[0020] This utility model also discloses a solar cell, which includes a semiconductor substrate and an electrode structure disposed on the semiconductor substrate. The electrode structure includes a fine grid electrode and a main grid electrode formed by printing using a screen printing assembly as described above.

[0021] The beneficial effects of this utility model are as follows: the main grid morphology is set on the printing surface of the carrier layer, the ink line of the main grid is set on the printing surface of the ink layer, the grid holes are set in the main grid morphology, and the ink bridge is formed between adjacent grid holes, which strengthens the strength of the main grid screen, improves the life of the main grid screen, enhances the ink application performance, improves the printing quality, and reduces costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the distribution of the main grid plate of this utility model;

[0023] Figure 2 for Figure 1 Enlarged view of center circle A1;

[0024] Figure 3 for Figure 1 Enlarged view of center circle A2;

[0025] Figure 4 for Figure 1 Enlarged view of center circle A3;

[0026] Figure 5 for Figure 1 Enlarged diagram of A4 in the middle circle;

[0027] Figure 6 for Figure 1 A partial hierarchical diagram of the main grid grid;

[0028] Figure 7 for Figure 1 Another partial layer diagram of the main grid version;

[0029] Figure 8 This is another layered schematic diagram of the main grid plate of this utility model;

[0030] Figure 9 This is another partially enlarged schematic diagram of the main grid plate of this utility model;

[0031] Figure 10 This is another partially enlarged schematic diagram of the main grid plate of this utility model;

[0032] Figure 11 This is another partially enlarged schematic diagram of the main grid plate of this utility model;

[0033] Figure 12 This is another partially enlarged schematic diagram of the main grid plate of this utility model. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model 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 complete understanding of the disclosure of this utility model.

[0035] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] This utility model discloses a main grid screen, comprising a carrier layer and an ink-absorbing layer stacked together. The carrier layer has a printing surface, and the ink-absorbing layer has a printing surface, with the printing surface and printing surface facing each other. The carrier layer has a plurality of main grid morphologies extending along a first direction and spaced apart along a second direction intersecting the first direction. Each main grid morphology includes a plurality of grid holes distributed within it, penetrating the carrier layer, with ink bridges formed between adjacent grid holes. The ink-absorbing layer includes penetrating main grid ink lines adapted to the main grid morphologies, extending along the second direction and communicating with the grid holes. The carrier layer has main grid morphologies formed from the printing surface, and the ink-absorbing layer has main grid ink lines formed from the printing surface. The main grid morphologies have grid holes within them, and ink bridges are formed between adjacent grid holes, thus strengthening the main grid screen, increasing its lifespan, improving ink absorption performance, enhancing printing quality, and reducing costs.

[0038] The arrangement of the grid holes is diverse, including linear arrangements in a single row, multiple parallel linear arrangements, staggered arrangements, grid arrangements, or polar coordinate arrangements. Specifically, staggered arrangements generally involve adjacent grid holes being misaligned, such as honeycomb or hexagonal grids; grid arrangements typically include rectangular, circular, polygonal, or random grids; polar coordinate arrangements involve grid holes distributed along a circumference or radius. The shape of a single grid hole can be triangular, polygonal, circular, elliptical, or irregular. The distribution direction of the grid holes can be parallel, right-angled, or at an angle. Parameters of multiple grid holes, such as aperture diameter, internal angle, distribution angle, and distribution period, may be the same or different. The main grid morphology is set on the printing surface of the carrier layer. Multiple grid holes, arranged through the carrier layer, are distributed within the main grid morphology. The grid holes are arranged in a grid or fence-like pattern and distributed along the main grid morphology. The main grid ink line is set through the ink layer, matching the main grid morphology, and connecting with the grid holes. During printing, the ink enters the grid holes on the printing surface, then falls from the printing surface after passing through the ink line of the main grid. The grid holes improve the overall strength of the main grid screen and enhance ink flow.

[0039] In one embodiment, the grid holes include fence holes extending along a first direction, with a plurality of fence holes spaced apart along a second direction, forming ink bridges between adjacent fence holes. The length of the fence holes ranges from 200μm to 2000μm, the width of the fence holes ranges from 50μm to 500μm, and the width of the ink bridges ranges from 5μm to 30μm, increasing the strength of the main grid and improving ink application. Specifically, the fence holes are elongated, with their ends being right-angled, chamfered, or arc-shaped, providing good stability and strength.

[0040] In one embodiment, the grid holes include mesh holes, with mesh lines between adjacent mesh holes forming ink bridges. The diameter of the mesh holes ranges from 50μm to 500μm, and the width of the ink bridges ranges from 5μm to 30μm. The mesh holes can be triangular, polygonal, circular, elliptical, or irregular in shape, exhibiting good stability and strength.

[0041] In one embodiment, the main gate topography includes a main line extending along a second direction and pads spaced apart on the main line, with grid holes distributed within the main line and pads. Both the main line and pads have grid holes, and the grid holes in the main line and the grid holes in the pads are connected; alternatively, the main line has fence holes, the pads have grid holes, and the fence holes extend into the pads. The main gate topography also includes solder feet on both sides of the pads, with grid holes connected to the grid holes in the pads or fence holes extending between the grid holes in the pads. The main gate topography also includes a harpoon portion located at the end of the main line, the harpoon portion including a base and forks extending from the base, the base having grid holes, and the forks having grid holes connected to the grid holes in the base or fence holes extending between the grid holes in the base. The harpoon portion also includes ears on both sides of the base, with grid holes connected to the grid holes in the base or fence holes extending between the grid holes in the base.

[0042] In one embodiment, the main grid screen further includes a second main grid morphology, which includes a plurality of line groups arranged at intervals along a second direction. Each line group includes a plurality of grid holes that penetrate the bearing layer. The ink-removing layer includes a plurality of ink-removing short lines that penetrate the layer. The ink-removing short lines are adapted to the line groups and extend along a first direction and communicate with the grid holes. The ends of the ink-removing short lines are right-angled, chamfered, or arc-shaped, or the ink-removing short lines are humerus-shaped as a whole, which has good ink-removing properties.

[0043] In one embodiment, the main grid screen further includes a third main grid shape, which is an edge line disposed at the edge and extending along the second direction. The third main grid shape includes a plurality of grid holes penetrating the bearing layer. The ink layer includes an ink-dip edge line that extends along the second direction and is connected to the grid holes, thereby increasing strength, improving ink-dip performance, and preventing line breakage.

[0044] In one implementation, the carrier layer is a metal layer or an alloy layer. The ink-absorbing layer is a metal layer or a polymer layer. The carrier layer and the ink-absorbing layer can be separated into layers, or they can be integrally formed. For example, the carrier layer and the ink-absorbing layer are made of the same material, and the layers are fused together without a clear interface, forming a single structure.

[0045] In one embodiment, the main grid plate further includes other metal layers, alloy layers, or polymer layers, with the metal layers or alloy layers combined with a carrier layer, and the metal layers, alloy layers, or polymer layers combined with an ink-dip layer to increase strength and ink-dip performance.

[0046] This utility model also discloses a screen printing assembly, which includes a fine grid screen and a main grid screen as described above. The fine grid screen includes a plurality of fine grid lines, which extend along a first direction and are spaced apart along a second direction.

[0047] This invention also discloses a solar cell comprising a semiconductor substrate and an electrode structure disposed on the semiconductor substrate. The electrode structure includes a fine grid electrode and a main grid electrode formed by printing using a screen printing assembly as described above. The screen printing assembly has high strength, good ink absorption, long service life, good printing quality, and the electrode structure has good conductivity and high conversion efficiency.

[0048] Please refer to the following: Figures 1 to 12 The main grid plate of this utility model is described by example.

[0049] Please refer to Figures 1 to 7 This utility model discloses a main grid screen 100, which includes a carrier layer 101 and an ink layer 102 stacked together. The carrier layer 101 is provided with a printing surface 1011, and the ink layer 102 is provided with a printing surface 1021, with the printing surface 1011 and the printing surface 1021 arranged opposite to each other. The carrier layer 101 is provided with a plurality of main grid morphologies 1, which extend along a first direction X. The plurality of main grid morphologies 1 are arranged at intervals along a second direction Y perpendicular to the first direction X. The main grid morphology 1 includes a plurality of grid holes 11 distributed within the main grid morphology 1. The grid holes 11 are disposed through the carrier layer 101, and ink bridges 12 are formed between adjacent grid holes 11. The ink layer 102 includes a through main grid ink line 21, which is adapted to the main grid morphology 1. The main grid ink line 21 extends along the second direction Y and is disposed in communication with the grid holes 11. The carrier layer 101 has a main grid shape 1 on the printing surface 1021, and the ink layer 102 has a main grid ink line 21 on the printing surface 1021. The main grid shape 1 has grid holes 11, and ink bridges 12 are formed between adjacent grid holes 11. This strengthens the main grid screen 100, increases the life of the main grid screen 100, improves ink application performance, improves printing quality, and reduces costs.

[0050] The main grid morphology 1 includes a main line 13 extending along the second direction Y, pads 14 spaced apart on the main line 13, and fork-shaped portions 15 located at the ends of the main line 13. The grid holes 11 within the main line 13 include fence holes 111, which extend along a first direction and are spaced apart along the second direction. Ink bridges 12 are formed between adjacent fence holes 111. The length of the fence holes 111 ranges from 200μm to 2000μm, and the width ranges from 50μm to 500μm. The width of the ink bridges 12 ranges from 5μm to 30μm, increasing the strength of the main grid screen 100 and improving ink application. The ends of the fence holes 111 are chamfered to further enhance strength.

[0051] The grid holes 11 within the pad 14 include mesh holes 112, with a diameter ranging from 50μm to 500μm. In this embodiment, the mesh holes 112 within the pad 14 are hexagonal and arranged in a honeycomb pattern. The mesh lines between adjacent mesh holes 112 form ink bridges 12, with a width ranging from 5μm to 30μm, exhibiting good stability and strength. The main grid morphology 1 also includes solder feet 16 disposed on both sides of the pad 14. The grid holes 11 within the solder feet 16 include fence holes 111. In this embodiment, the fence holes 111 within the solder feet 16 extend along the second direction Y, and multiple fence holes 111 are arranged along the first direction X, with ink bridges 12 between adjacent fence holes 111.

[0052] The harpoon portion 15 includes a base 151, a fork portion 152 extending from the base 151, and ears 153 located on both sides of the base 151. The grid holes 11 within the base 151 include mesh holes 112, which are hexagonal in shape and arranged in a honeycomb pattern. The grid holes 11 within the ears 153 include mesh holes 112, which are rectangular in shape. The grid holes 11 within the fork portion 152 include fence holes 111, which extend along a first direction X, and a plurality of fence holes 111 are spaced apart along a second direction Y.

[0053] Furthermore, the main grid plate 100 also includes a second main grid morphology 3, which includes a plurality of line groups 31 arranged at intervals along the second direction Y. Each line group 31 includes a plurality of grid holes 11 that penetrate the bearing layer 101. In this embodiment, the grid holes 11 in the line group 31 include a plurality of fence holes 111 arranged at intervals along the first direction X. The fence holes 111 of the line group 31 extend along the second direction Y. The ends of the fence holes 111 are chamfered. The ink layer 102 includes a plurality of ink-dip lines 22 that penetrate through it. The ink-dip lines 22 are adapted to the line groups 31 and extend along the first direction X and communicate with the grid holes 11. In this embodiment, the ink-dip lines 22 are generally shaped like a humerus with large ends and a thin middle, which has good ink-dip performance.

[0054] Furthermore, the main grid plate 100 also includes a third main grid shape 4, which is a side line disposed at the edge and extending along the second direction Y. The side line includes a plurality of grid holes 11 disposed through the bearing layer 101. In this embodiment, the grid holes 11 of the side line include a plurality of fence holes 111 disposed along the side line. The fence holes 111 in the side line extend along the first direction X and their ends are chamfered. The ink layer 102 includes an ink-down edge line 23 disposed through the edge line. The ink-down edge line 23 extends along the edge line and communicates with the fence holes 111.

[0055] In this embodiment, the carrier layer 101 is a nickel alloy layer, and the ink layer 102 is a PI layer, with a clear interface between the carrier layer 101 and the ink layer 102. For other embodiments, please refer to... Figure 8 In the middle, the carrier layer 101' is a nickel layer, and the ink layer 102' is also a nickel layer. They can be integrally formed or fused together without an interface to form an integral setting.

[0056] Please refer to Figures 9 to 12 This discloses other embodiments of the main grid plate of this utility model.

[0057] Please refer to Figure 9 In this embodiment, the main grid morphology 5 includes a main line 51 and a pad 52. The grid holes 11 in the main line 51 are fence holes 111, and the grid holes 11 in the pad 52 are mesh holes 112. An ink bridge 12 is formed between adjacent grid holes 11. The fence holes 111 in the main line 51 are spaced apart along the second direction and extend into the pad 52. The mesh holes 112 in the pad 52 surround the fence holes 111 extending into the pad 52, ensuring ink flow and preventing printing line breakage. The main grid morphology 5 is matched with the main grid ink line 211, and the main grid ink line 211 is connected to the grid holes 11.

[0058] Please refer to Figure 10 In this embodiment, the main grid topography 6 includes a main line 61 and a pad 62. The grid holes 11 within the main line 61 are rectangular mesh holes 112, which are obliquely distributed. The grid holes 11 within the pad 62 are hexagonal honeycomb-shaped mesh holes 112. The mesh holes 112 of the main line 61 extend into the pad 62 and are surrounded by the mesh holes 112 within the pad 62. Alternatively, some mesh holes 112 within the pad 62 are configured to be the same as those of the main line 61 to prevent issues such as line breaks at the junction and ensure ink flow. Adjacent mesh holes 112 form ink bridges 12. The main grid topography 6 is configured to match the main grid ink lines 212.

[0059] Please refer to Figure 11In this embodiment, the main grid morphology 7 includes a main line 71 and a fork portion 72 located at the end of the main line 71. The fork portion 72 includes a base 721 and a fork portion 722 extending from the base 721. The grid holes 11 in the base 721 are hexagonal honeycomb-shaped mesh holes 112. The grid holes 11 in the main line 71 are a plurality of fence holes 111 spaced apart along the second direction Y, and the grid holes 111 in the fork portion 722 are a plurality of fence holes 111 spaced apart along the second direction Y. The fence holes 111 in the main line 71 and the fence holes in the two forks 722 extend into the base 721 and are surrounded by the mesh holes 112 of the base 721. From another angle, the grid holes 11 in the base 721 are partially arranged side by side with the fence holes 111 of the main line 71 and the fork portion 722, which increases strength, improves ink adhesion, and prevents line breakage. The main grid morphology 7 is set to match the main grid underline 213.

[0060] Please refer to Figure 12 In this embodiment, the grid holes 11 within the edge of the third main grid morphology 8 include a plurality of mesh holes 112. The mesh holes 112 are polygonal, including rectangles, trapezoids, pentagons, etc. An ink bridge 12 is formed between adjacent mesh holes 112. The ink bridge 12 intersects with the ink-down edge line 231, and the ink-down edge line 231 is connected to the mesh holes 112.

[0061] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail above with reference to the accompanying drawings. Many specific details are set forth in the above description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described above, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; however, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A master screen characterized by, It includes a carrier layer and an ink-absorbing layer stacked together. The carrier layer has a printing surface, and the ink-absorbing layer has a printing surface, with the printing surface and the printing surface facing each other. The carrier layer has a plurality of main grid morphologies extending along a first direction. The plurality of main grid morphologies are arranged at intervals along a second direction intersecting the first direction. Each main grid morphology includes a plurality of grid holes distributed within the main grid morphology. The grid holes penetrate the carrier layer, and an ink bridge is formed between adjacent grid holes. The ink layer includes a through-type main grid ink line, which is adapted to the shape of the main grid and extends along a second direction and communicates with the grid holes.

2. The main grid plate according to claim 1, characterized in that, The grid holes include fence holes, which extend along a first direction and are spaced apart along a second direction, with the ink bridge formed between adjacent fence holes. The length of the fence hole ranges from 200μm to 2000μm, the width of the fence hole ranges from 50μm to 500μm, and the width of the ink bridge ranges from 5μm to 30μm.

3. The main grid plate according to claim 2, characterized in that, The fence openings are elongated, and their ends are either right-angled, chamfered, or arc-shaped.

4. The main grid plate according to claim 1, characterized in that, The grid holes include mesh holes, and the mesh lines between adjacent mesh holes form ink bridges. The diameter of the mesh holes ranges from 50μm to 500μm, and the width of the ink bridges ranges from 5μm to 30μm.

5. The main grid plate according to claim 1, characterized in that, The main grid morphology includes a main line extending along a second direction and pads spaced apart on the main line, wherein grid holes are distributed within the main line and the pads.

6. The main grid plate according to claim 5, characterized in that, Both the main line and the pad are provided with mesh holes, and the mesh holes in the main line and the mesh holes in the pad are connected; or, the main line is provided with fence holes, the pad is provided with mesh holes, and the fence holes extend into the pad.

7. The main grid plate according to claim 6, characterized in that, The main grid morphology also includes solder feet disposed on both sides of the pad, wherein the solder feet are provided with grid holes connected to the grid holes in the pad or with fence holes extending to the grid holes in the pad.

8. The main grid plate according to claim 5, characterized in that, The main grid morphology also includes a harpoon portion located at the end of the main line. The harpoon portion includes a base and a fork portion extending from the base. The base is provided with a grid hole, and the fork portion is provided with a grid hole connected to the grid in the base or a fence hole extending to the grid hole in the base.

9. The main grid plate according to claim 8, characterized in that, The harpoon portion also includes ears located on both sides of the base, the ears being provided with mesh holes connected to the mesh holes in the base or with fence holes diffracted to the mesh holes in the base.

10. The main grid plate according to claim 1, characterized in that, The main grid pattern also includes a second main grid shape, which includes a plurality of line groups arranged at intervals along a second direction. Each line group includes a plurality of grid holes that penetrate the bearing layer. The ink layer includes a plurality of ink down lines that penetrate the layer. The ink down lines are adapted to the line groups and extend along a first direction and communicate with the grid holes.

11. The main grid plate according to claim 10, characterized in that, The end of the ink-down line is in the shape of a right angle, a chamfer, or an arc, or the ink-down line as a whole is in the shape of a humerus.

12. The main grid plate according to claim 1, characterized in that, The main grid pattern also includes a third main grid shape, which is a side line disposed at the edge and extending along the second direction. The third main grid shape includes a plurality of grid holes penetrating the bearing layer. The ink layer includes an ink-down edge line that penetrates through the layer. The ink-down edge line extends along the second direction and communicates with the grid holes.

13. The main grid plate according to claim 1, characterized in that, The carrier layer is a metal layer or an alloy layer; the ink layer is a metal layer or a polymer layer.

14. The main grid plate according to claim 13, characterized in that, The carrier layer and the ink layer are arranged in separate layers, or the carrier layer and the ink layer are arranged integrally.

15. A screen printing component, characterized in that, It includes a fine grid screen and a main grid screen as claimed in any one of claims 1 to 14, wherein the fine grid screen includes a plurality of fine grid lines extending along a first direction and the plurality of fine grid lines are spaced apart along a second direction.

16. A solar cell, characterized in that, It includes a semiconductor substrate and an electrode structure disposed on the semiconductor substrate, the electrode structure including a fine gate electrode and a main gate electrode formed by printing using the screen printing assembly as described in claim 15.

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