Mask for brass sheet printing and solar cell preparation device

Abstract

The utility model provides a mask plate for brass sheet printing and a solar cell preparation device. The utility model provides a mask plate for brass sheet printing, which comprises a mask plate body and an anti-scratching block, and grids formed by mask lines are arranged on a printing area of the mask plate body. The anti-scratching blocks are arranged on the mask plate body, the projections of the anti-scratching blocks on the mask plate body in the thickness direction of the mask plate body are located in the grids, and the anti-scratching blocks have light transmittance. According to the mask plate for brass sheet printing, poor batch printing of brass sheets can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell technical field especially relates to a mask for brass sheet printing and solar cell preparation device. BACKGROUND

[0002] In order to prepare the double-sided heterojunction cell with copper grid line, it is necessary to print the photosensitive glue on the brass sheet. The preparation process of the brass sheet includes original silicon wafer cleaning, texturing, diffusion heterojunction, PVD (Physical Vapor Deposition) ITO (Indium Tin Oxide) plating, and PVD copper film plating. After the photosensitive glue on the brass sheet is baked and exposed to light, the grid line pattern is formed. The glue on the grid line is removed by developing, and the copper film is exposed. Then, the grid line is grown on the copper film by electroplating. In actual production, if the brass sheet is broken during printing of the photosensitive glue and is not cleaned in time, the glue on the broken brass sheet may stick to the printing screen plate. When the next brass sheet is printed, the glue on the broken brass sheet may also stick to the next brass sheet. During the subsequent printing process, the mask may be scratched, resulting in poor batch printing of the brass sheet. SUMMARY

[0003] The utility model aims at providing a mask for brass sheet printing and a solar cell preparation device to solve the technical problem of poor batch printing of the brass sheet caused by the broken brass sheet in the prior art.

[0004] The technical solution of the utility model is as follows. A mask for brass sheet printing is provided, which includes a mask body and an anti-scratch block. A grid formed by mask lines is arranged on the printing area of the mask body.

[0005] The anti-scratch block is arranged on the mask body, and the projection of the anti-scratch block on the mask body in the thickness direction of the mask body is located in the grid. The anti-scratch block has light transmittance.

[0006] Further, the number of the anti-scratch blocks is equal to the number of the grids, and the anti-scratch blocks correspond to the grids one by one.

[0007] Further, the shape of the projection is the same as the shape of the grid, and the area size of the projection is equal to the area size in the grid.

[0008] Further, the middle part of the anti-scratch block has light transmittance.

[0009] Further, the peripheral edge part of the anti-scratch block has light blocking property.

[0010] Further, the shape of the grid is polygon, and the anti-scratch block is a column structure.

[0011] Further, the shape of the grid is rectangular, and the anti-scratch block is a quadrangular prism structure.

[0012] Further, the height of the anti-scratch block is 50-1000 μm.

[0013] Further, the mask version body and the anti-scratch block are both glass structures.

[0014] Another technical solution of the utility model is as follows, and the utility model also provides a solar cell preparation device, which comprises the mask version for brass sheet printing according to any one of the above technical solutions.

[0015] The utility model has the advantages that: the grid formed by the mask lines is arranged on the printing area of the mask version body; the anti-scratch block is arranged on the mask version body, and the projection of the anti-scratch block on the mask version body in the thickness direction of the mask version body is located in the grid; the anti-scratch block has light permeability; when the brass sheet is placed on the anti-scratch block for printing, even if the brass sheet is broken and the anti-scratch block is scratched, the mask version body will not be scratched; only the glass block needs to be replaced and the debris needs to be cleaned, so that the printing of the subsequent brass sheet will not be affected, and the batch printing of the brass sheet is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a structure schematic view of the mask version for brass sheet printing;

[0017] Figure 2 The utility model provides a top view of the mask version for brass sheet printing;

[0018] Figure 3 The utility model provides a structure schematic view of the brass sheet after being placed on the anti-scratch block;

[0019] Figure 4 The utility model provides an explosion view. Figure 3

[0020] Reference signs: 1-mask version body; 2-anti-scratch block; 3-mask line; 4-grid; 5-brass sheet; 6-printing area. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] ​Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the other embodiments. It is explicitly contemplated that embodiments described herein can be combined with each other, unless otherwise specifically stated.

[0023] Figure 1 is a structural schematic view of a mask plate for brass sheet printing according to an embodiment of the application. It should be noted that the mask plate for brass sheet printing according to the application is not limited to the structure shown in Figure 1 . As shown in Figure 1 , the mask plate for brass sheet printing includes a mask plate body 1 and a scratch-proof block 2, and the mask plate body 1 is provided with a grid 4 formed by mask lines 3 on a printing area 6.

[0024] The scratch-proof block 2 is arranged on the mask plate body 1, and the projection of the scratch-proof block 2 on the mask plate body 1 along the thickness direction of the mask plate body 1 is located in the grid 4, and the scratch-proof block 2 has light transmittance.

[0025] The mask plate for brass sheet printing according to the application is provided with the grid 4 formed by the mask lines 3 on the mask plate body 1; the scratch-proof block 2 is arranged on the mask plate body 1, and the projection of the scratch-proof block 2 on the mask plate body 1 along the thickness direction of the mask plate body 1 is located in the grid 4, and the scratch-proof block 2 has light transmittance; when the brass sheet 5 is placed on the scratch-proof block 2 for printing, even if the brass sheet 5 is broken and the scratch-proof block 2 is scratched, the mask plate body 1 will not be scratched, and only the glass block needs to be replaced and the debris needs to be cleaned, so that the printing of the subsequent brass sheet 5 will not be affected, and the batch printing of the brass sheet 5 is avoided.

[0026] In one specific embodiment, as shown in Figure 1 , the white area of the mask plate body 1 is the printing area 6, which can be a light-transmitting area, and the diagonal area of the mask plate body 1 is a non-printing area, which can be a non-light-transmitting area; Figure 1 may be a side view of the mask plate for brass sheet printing, a top view of the mask plate for brass sheet printing, as shown in Figure 2 , a structural schematic view of the brass sheet 5 after being placed on the scratch-proof block 2, as shown in Figure 3 , Figure 3 , an exploded view, as shown in Figure 4 , when the brass sheet 5 is specifically printed, ultraviolet light is irradiated from below (the other side of the surface where the mask lines 3 are located) of the printing area 6 of the mask plate body 1, part of the light is blocked by the mask lines 3, and part of the light transmits through the light-transmitting area of the scratch-proof block 2. The mask lines 3 can be chrome-plated grid lines.

[0027] In some embodiments, the number of the scratch-preventing blocks 2 is equal to the number of the grids 4, and the scratch-preventing blocks 2 correspond to the grids 4 one by one.

[0028] The utility model discloses, through making the number of scratch-preventing block 2 equal to the number of grid 4, and scratch-preventing block 2 correspond to the grid 4 one by one, can better remove the glue corresponding to the mask line 3 part on brass sheet 5, guarantee the accurate printing of brass sheet 5, simultaneously, can better protect mask version body 1, prevent it from being scratched by brass sheet 5 dregs.

[0029] In some embodiments, the shape of the projection is the same as the shape of the grid 4, and the area size of the projection is equal to the area size in the grid 4.

[0030] The utility model discloses, through making the shape of projection equal to the shape of grid 4, make the area size of above-mentioned projection equal to the area size in grid 4, can guarantee the accurate printing of brass sheet 5, also can better protect mask version body 1, prevent it from being scratched by brass sheet 5 dregs.

[0031] In a specific embodiment, the scratch-preventing block 2 is placed in the grid 4, the bottom of the scratch-preventing block 2 is attached to the mask version body 1, and the top of the scratch-preventing block 2 contacts the brass sheet 5 when printing the brass sheet 5.

[0032] In some embodiments, the middle part of the scratch-preventing block 2 is light-transmitting.

[0033] The utility model discloses, through making the middle part of scratch-preventing block 2 light-transmitting, can better remove the glue corresponding to the mask line 3 part on brass sheet 5, guarantee the accurate printing of brass sheet 5.

[0034] In some embodiments, the four peripheral edge parts of the scratch-preventing block 2 are light-blocking.

[0035] Because the ultraviolet light will scatter when it passes through the middle light-transmitting part of the scratch-preventing block 2, the utility model makes the four peripheral edge parts of the scratch-preventing block 2 light-blocking, which can avoid the scattered light from irradiating the glue corresponding to the mask line 3 part on the brass sheet 5, thereby guaranteeing the accurate printing of the brass sheet 5.

[0036] In some embodiments, the mask version body 1 and the scratch-preventing block 2 are both of glass material structure.

[0037] In a specific embodiment, the four peripheral edge parts of the scratch-preventing block 2 of glass material can be light-blocking treated, for example, painting, sanding, and etching, so that the four peripheral edge parts of the scratch-preventing block 2 are light-blocking, and the glass materials of the mask version body 1 and the scratch-preventing block 2 can be the same.

[0038] In some embodiments, the shape of the grid 4 is polygonal, and the scratch-proof block 2 is a column structure.

[0039] In a specific embodiment, the grid lines of the brass sheet 5 correspond to the mask lines 3 on the mask version body 1, and the grid lines of the brass sheet 5 have various shapes, so that the shape of the grid 4 also has various shapes, and the scratch-proof block 2 can be a column structure, the column structure is a three-dimensional structure with two parallel and identical surfaces, and the above column structure can be a straight circular column or a straight prism, when the shape of the grid 4 is polygonal, the scratch-proof block 2 is a straight prism structure, and when the shape of the grid 4 is circular, the scratch-proof block 2 is a straight circular column structure.

[0040] In some embodiments, the shape of the grid 4 is rectangular, and the scratch-proof block 2 is a quadrangular prism structure.

[0041] In a specific embodiment, the above quadrangular prism structure is a straight prism with two rectangular surfaces and a straight line perpendicular to the bottom surface.

[0042] In some embodiments, the height of the scratch-proof block 2 is 50-1000 μm.

[0043] The utility model discloses a height of scratch-proof block 2 is set to 50-1000 μm, can better protect mask version body 1, prevent it from being scratched by brass sheet 5 slag, can also guarantee the accurate printing of brass sheet 5.

[0044] The existing brass sheet printing process is that the mechanism takes the sheet and places it under the mask plate, and then performs printing and exposure, the mask lines 3 of the mask plate are easy to contact the sheet, the diameter of the coating slag is 100-1000 μm, and when the coating slag is stuck on the brass sheet, it is very easy to contact the mask plate, thereby scratching the mask lines 3 of the mask plate, causing the mask lines 3 to be not exposed and the fixed area not to be exposed.

[0045] The utility model discloses a mask plate for brass sheet printing, which is provided with a grid 4 formed by mask lines 3 on the mask version body 1, the scratch-proof block 2 is arranged on the mask version body 1, the projection of the scratch-proof block 2 on the mask version body 1 in the thickness direction of the mask version body 1 is located in the grid 4, and the scratch-proof block 2 has light transmission; when the brass sheet 5 is placed on the scratch-proof block 2 for printing, even if the brass sheet 5 is broken and scratches the scratch-proof block 2, the mask version body 1 will not be scratched, only the glass block needs to be replaced, and the slag falling into the mask lines 3 area is cleaned, so that the printing of the subsequent brass sheet 5 is not affected, and the batch printing of the brass sheet 5 is avoided. The mask plate for brass sheet printing can expose the brass sheet 5 above the scratch-proof block 2, and the brass sheet 5 is attached to the scratch-proof block 2 by gravity, so that the brass sheet 5 is not lifted to the position by the machine and scratches the mask plate.

[0046] The utility model provides a solar cell preparation device, including the mask plate for brass sheet printing as any one of above -mentioned embodiment.

[0047] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0048] The above embodiments only express the preferred embodiments of the present application, which are described in detail, but should not be construed as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the 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 mask for printing on brass sheet, characterized in that, The mask version body has a printing area on which a grid formed by mask lines is arranged; The anti-scratch block is arranged on the mask version body, and a projection of the anti-scratch block on the mask version body in a thickness direction of the mask version body is located in the grid, and the anti-scratch block has light transmittance.

2. The mask for printing of brass sheet according to claim 1, wherein, The number of the anti-scratch blocks is equal to the number of the grids, and the anti-scratch blocks correspond to the grids one by one.

3. The mask for printing of brass sheet according to claim 2, wherein, The shape of the projection is the same as the shape of the grid, and the area size of the projection is equal to the area size in the grid.

4. The mask for printing of brass sheet according to claim 3, wherein The middle part of the anti-scratch block has light transmittance.

5. The mask for printing of brass sheet as claimed in claim 3 wherein, The four peripheral edge parts of the anti-scratch block have light impermeability.

6. The mask for printing of brass sheet as claimed in claim 3 wherein, The shape of the grid is a polygon, and the anti-scratch block is a column structure.

7. The mask for printing of brass sheet as claimed in claim 3 wherein, The shape of the grid is a rectangle, and the anti-scratch block is a quadrangular prism structure.

8. The mask for printing of brass sheet according to claim 6 or 7, characterized in that, The height of the anti-scratch block is 50-1000 μm.

9. The mask sheet for printing of brass sheet according to claim 1, wherein The mask version body and the anti-scratch block are both made of glass.

10. An apparatus for manufacturing a solar cell, characterized by comprising: A mask plate for printing on brass sheet, comprising the mask plate according to any one of claims 1-9.

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