CN114714750B - Method for manufacturing screen printing plate for printing positive electrode of solar cell and screen printing plate - Google Patents
Method for manufacturing screen printing plate for printing positive electrode of solar cell and screen printing plate Download PDFInfo
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- CN114714750B CN114714750B CN202210290501.2A CN202210290501A CN114714750B CN 114714750 B CN114714750 B CN 114714750B CN 202210290501 A CN202210290501 A CN 202210290501A CN 114714750 B CN114714750 B CN 114714750B
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- 238000007639 printing Methods 0.000 title claims abstract description 73
- 238000007650 screen-printing Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 83
- 239000000839 emulsion Substances 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims description 47
- 239000010959 steel Substances 0.000 claims description 47
- 238000003475 lamination Methods 0.000 claims description 39
- 229920000728 polyester Polymers 0.000 claims description 30
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 150000002632 lipids Chemical class 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 239000004744 fabric Substances 0.000 description 6
- 239000004809 Teflon Substances 0.000 description 5
- 229920006362 Teflon® Polymers 0.000 description 5
- 238000007790 scraping Methods 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- -1 Poly tetra fluoroethylene Polymers 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/34—Screens, Frames; Holders therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2215/00—Screen printing machines
- B41P2215/10—Screen printing machines characterised by their constructional features
- B41P2215/12—Screens
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
The application discloses a method for manufacturing a screen printing plate of a positive electrode of a printing solar cell and the screen printing plate, the method comprises the steps of preparing a reticular framework layer, preparing a wear-resistant layer, arranging emulsion, the reticular framework layer and the wear-resistant layer in a pressing space of a pressing device, wherein the pressing device comprises a first rough layer, the first rough layer is used for enclosing at least part of the pressing space, pressing the emulsion, the reticular framework layer and the wear-resistant layer which are arranged in the pressing space to form a screen printing plate blank, the screen printing plate blank comprises a first emulsion layer, the reticular framework layer, a second emulsion layer and the wear-resistant layer which are overlapped, a plurality of protrusions or depressions which are distributed in an array are formed on the first surface of the first emulsion layer and are opposite to the reticular framework layer, a slurry inlet is formed on the first surface of the screen printing plate blank, a concave positive electrode printing pattern is formed on the second surface of the wear-resistant layer, and a slurry channel which is communicated with the positive electrode printing pattern and the slurry inlet is formed in the interior of the screen printing plate blank, so that the screen printing plate blank forms the screen printing plate.
Description
Technical Field
The application belongs to the technical field of solar cell manufacturing, and particularly relates to a manufacturing method of a screen printing plate for printing a positive electrode of a solar cell and the screen printing plate.
Background
The screen is an important tool for printing the positive electrode of the solar cell, slurry is poured into the screen, the slurry is driven to move on the screen by a scraper, the slurry is extruded onto the solar cell through meshes on the screen, and a corresponding pattern is formed on the solar cell so as to form the positive electrode of the solar cell.
In the related art, the surface of the screen is smooth, so that the scraping plate can be slipped, uneven thickness of the grid line of the positive electrode of the printed solar cell is caused, and the resistance of the paste during high-speed printing on the smooth screen is small, so that part of the paste which is extruded to the solar cell through the mesh can not be successfully extruded, the problems of uneven thickness of the grid line, broken grid, virtual printing and the like of the positive electrode of the printed solar cell are caused, and the printing quality of the solar cell is affected.
Disclosure of Invention
The embodiment of the application aims to provide a manufacturing method of a screen printing plate for printing a positive electrode of a solar cell and the screen printing plate, which can solve the problem that in the related art, the surface of the screen printing plate for printing the positive electrode of the solar cell is smoother, so that the printing quality of the screen printing plate is poor.
In order to solve the technical problems, the application is realized as follows:
the embodiment of the application provides a manufacturing method of a screen printing plate for printing a positive electrode of a solar cell, which comprises the following steps:
preparing a reticular framework layer;
preparing a wear-resistant layer;
the emulsion, the reticular framework layer and the wear-resistant layer are arranged in a lamination space of the lamination device, the lamination device comprises a first rough layer, and the first rough layer is used for enclosing at least part of the lamination space;
performing lamination operation on the emulsion, the reticular framework layer and the wear-resistant layer which are arranged in the lamination space to form a screen blank, wherein the screen blank comprises a first emulsion layer, the reticular framework layer, a second emulsion layer and the wear-resistant layer which are overlapped, and a plurality of protrusions or depressions distributed in an array are formed on the first surface of the first emulsion layer, which is opposite to the reticular framework layer, by the first rough layer;
and a slurry inlet is formed in the first surface of the screen plate blank, a concave positive electrode printing pattern is formed in the second surface of the wear-resisting layer, which is opposite to the reticular framework layer, and a slurry channel which is communicated with the positive electrode printing pattern and the slurry inlet is formed in the screen plate blank, so that the screen plate blank forms a screen plate.
The embodiment of the application also provides a screen printing plate for printing a positive electrode of a solar cell, which comprises a first emulsion layer, a netlike framework layer, a second emulsion layer and a wear-resistant layer, wherein:
the first emulsion layer, the reticular framework layer, the second emulsion layer and the wear-resistant layer are sequentially overlapped and fixedly connected, and a plurality of protrusions or depressions distributed in an array are arranged on the first surface of the first emulsion layer, which is opposite to the reticular framework layer;
the second surface of the wear-resisting layer, which is opposite to the reticular framework layer, is provided with a sunken positive electrode printing pattern, the first surface is provided with a slurry inlet, and the inside of the screen plate is provided with a slurry channel which is communicated with the slurry inlet and the positive electrode printing pattern.
In this application embodiment, the first surface of half tone is the roughness surface that has the protruding or sunken of array distribution, in the printing process of carrying out solar cell's positive electrode, when the scraper blade drove thick liquids and remove at high speed on the half tone, protruding or sunken on the first surface has the resistance effect to thick liquids, make thick liquids roll at first surface, and then make thick liquids can be more smoothly extruded the thick liquids entry of half tone, and positive electrode printing pattern through thick liquids passageway and half tone second surface falls into solar cell, avoid leading to partly thick liquids to be taken away by the scraper blade rapidly because the half tone is smooth, can not be successfully extruded in the thick liquids entry, can not fall into solar cell through the half tone, the virtual seal problem that leads to also avoid leading to the problem of jumping the sword when printing because reasons such as scraper blade skidding, and then avoid the thick bars of the solar cell's that prints, thick bars, grid line thickness uneven, broken bars, virtual seal etc. problem, finally promote the printability of half tone. Therefore, the method and the device can solve the problem that in the related art, the screen printing quality of the screen printing plate is poor due to the fact that the surface of the screen printing plate for printing the positive electrode of the solar cell is smooth.
Drawings
Fig. 1 is a flowchart of a method of fabricating a screen printing a positive electrode of a solar cell according to an embodiment of the present application;
FIG. 2 is a flow chart of preparing a mesh scaffold layer as disclosed in embodiments herein;
FIG. 3 is a flow chart of finished product inspection and packaging of a screen printing plate according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a pressing tool, a mesh skeleton layer, and a wear-resistant layer when pressing to form a screen blank according to an embodiment of the present application.
Reference numerals illustrate:
100-net-shaped framework layer,
200-wear-resistant layer,
310-first laminate, 320-second laminate, 330-first matte layer, 340-second matte layer.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.
As shown in fig. 1 to 4, the present application discloses a method for manufacturing a screen printing a positive electrode of a solar cell, the method comprising the steps of:
s101, preparing a net-shaped framework layer 100.
The mesh backbone layer 100 functions as a supporting backbone in the screen.
S102, preparing the wear-resistant layer 200.
The wear-resistant layer 200 may be made of various materials, for example, PI (Polyimide) film may be used for the wear-resistant layer 200, and of course, other polymer materials may be used for the wear-resistant layer 200. The wear-resistant layer 200 can enhance the wear resistance of the screen, reduce the wear of foreign matters in the paste on the screen during printing, and prolong the service life of the screen.
It should be noted that the order of preparing the mesh skeleton layer 100 and the wear-resistant layer 200 is not limited in this application, that is, S101 may be performed before S102, S102 may be performed before S101, and, of course, S101 and S102 may be performed simultaneously.
S103, embedding emulsion, the netlike framework layer 100 and the wear-resistant layer 200 into a lamination space of a lamination device, wherein the lamination device comprises a first rough layer 330, and the first rough layer 330 is used for enclosing at least part of the lamination space.
In a subsequent lamination process, the first rough layer 330 may face the surface of the mesh-like skeleton layer 100 facing away from the wear layer 200, the emulsion may be a photosensitive emulsion, and the emulsion may be interposed between the mesh-like skeleton layer 100 and the wear layer 200 prior to lamination.
Alternatively, the bonding tool may further include a first bonding plate 310 and a second bonding plate 320, and the first roughened layer 330 may be fixed to a surface of the first bonding plate 310 facing the second bonding plate 320. In this application, the lamination process may be high temperature lamination, so the first lamination plate 310 and the second lamination plate 320 may be high temperature resistant lamination plates, the first rough layer 330 may be high temperature resistant teflon (Poly tetra fluoroethylene ) cloth, and of course, the first rough layer 330 may also be other kinds of surface rough cloth.
And S104, performing lamination operation on the emulsion, the reticular framework layer 100 and the wear-resistant layer 200 which are arranged in the lamination space to form a screen blank.
The screen blank comprises a first emulsion layer, a netlike skeleton layer 100, a second emulsion layer and a wear-resistant layer 200 which are sequentially overlapped, wherein a first surface of the first emulsion layer, which is opposite to the netlike skeleton layer 100, is formed with a plurality of protrusions or depressions distributed in an array by a first rough layer 330.
When the emulsion, the reticular framework layer 100 and the wear-resistant layer 200 are arranged in the lamination space of the lamination device, the emulsion is arranged between the reticular framework layer 100 and the wear-resistant layer 200, during lamination, part of the emulsion is extruded and coated on the opposite surfaces of the reticular framework layer 100 and the wear-resistant layer 200, and after the emulsion is dried, a second emulsion layer is formed between the reticular framework layer 100 and the wear-resistant layer 200. The mesh skeleton layer 100 has a plurality of meshes, a part of emulsion overflows to the surface of the mesh skeleton layer 100, which is opposite to the wear-resistant layer 200, through the meshes in the pressing process, after the emulsion is dried, a first emulsion layer is formed on the surface of the mesh skeleton layer 100, which is opposite to the wear-resistant layer 200, and because the first rough layer 330 faces the surface of the mesh skeleton layer 100, which is opposite to the wear-resistant layer 200, the emulsion on the surface of the mesh skeleton layer 100 can adapt to and conform to the shape of the first rough layer 330, so that a plurality of protrusions or recesses distributed in arrays are formed on the first surface of the dried first emulsion layer, which is opposite to the mesh skeleton layer 100, so that the first surface of the screen is a rough surface.
Specifically, the roughness of the first surface may be 12 to 16 μm.
S105, a slurry inlet is formed in the first surface of the screen blank, a concave positive electrode printing pattern is formed in the second surface of the wear-resistant layer 200, which faces away from the reticular framework layer 100, and a slurry channel which is communicated with the positive electrode printing pattern and the slurry inlet is formed in the screen blank, so that the screen blank forms a screen.
Alternatively, the positive electrode printed pattern may penetrate the abrasion resistant layer 200.
Alternatively, the projection of the slurry inlet in the direction perpendicular to the screen, the projection of the slurry channel in the direction perpendicular to the screen, and the projection of the positive electrode print pattern in the direction perpendicular to the screen may be coincident, that is, the shape of the slurry inlet is the same as the positive electrode print pattern, the shape of the slurry channel is the same as the positive electrode print pattern, and the three are disposed opposite to each other in the direction perpendicular to the screen. In this case, the slurry can flow out through the screen more smoothly.
The paste of the positive electrode of the printed solar cell may be silver paste. In the process of printing the positive electrode of the solar cell, the screen plate can be placed right above the solar cell, the slurry is poured onto the first surface of the screen plate, the slurry is driven to move on the first surface of the screen plate by the scraping plate, and the slurry sequentially passes through the slurry inlet, the slurry channel and the positive electrode printing pattern and then falls onto the solar cell below the screen plate under the extrusion of the scraping plate.
In this application embodiment, the first surface of half tone is the roughness surface that has the protruding or sunken of array distribution, in the printing process of carrying out solar cell's positive electrode, when the scraper blade drove thick liquids and remove at high speed on the half tone, protruding or sunken on the first surface has the resistance effect to thick liquids, make thick liquids roll at first surface, and then make thick liquids can be more smoothly extruded the thick liquids entry of half tone, and positive electrode printing pattern through thick liquids passageway and half tone second surface falls into solar cell, avoid leading to partly thick liquids to be taken away by the scraper blade rapidly because the half tone is smooth, can not be successfully extruded in the thick liquids entry, can not fall into solar cell through the half tone, the virtual seal problem that leads to also avoid leading to the problem of jumping the sword when printing because reasons such as scraper blade skidding, and then avoid the thick bars of the solar cell's that prints, thick bars, grid line thickness uneven, broken bars, virtual seal etc. problem, finally promote the printability of half tone. Therefore, the method and the device can solve the problem that in the related art, the screen printing quality of the screen printing plate is poor due to the fact that the surface of the screen printing plate for printing the positive electrode of the solar cell is smooth.
In addition, in the prior art, because the screen plate surface is smoother, the grid breakage can possibly be caused, in order to ensure the integrity of the positive electrode of the printed solar battery, repeated printing operation is needed, the repeated printing operation refers to operation that a repeated scraping plate drives slurry to move on the screen plate, the more the repeated times are, the greater the probability that the mesh of the screen plate is blocked, the screen plate needs to be wiped, the service life of the screen plate can be influenced, the surface of the screen plate manufactured through the method is rough, the printing performance is good, the positive electrode of the complete solar battery can be obtained through the printing operation of fewer times, therefore, the screen plate does not need to be frequently wiped, and the service life of the screen plate can be prolonged.
In this application, the abrasion resistant layer 200 may be a PI film, which is relatively hard and may be crushed if the PI film is directly contacted with the second pressing plate 320. For this reason, the lamination apparatus may further include a second rough layer 340, where the second rough layer 340 may be a high temperature resistant teflon cloth, the second rough layer 340 may be fixed on a surface of the second lamination plate 320 facing the first lamination plate 310, and when the lamination operation is performed, the second rough layer 340 may be disposed facing the wear-resistant layer 200, the teflon cloth is soft, and in the lamination process, the teflon cloth of the second rough layer 340 contacts the wear-resistant layer 200, which may play a role of buffering, so as to avoid damage to the wear-resistant layer 200 in the lamination process. The first roughened layer 240 may also be teflon cloth.
The mesh skeleton layer 100 may be made of steel mesh, but the steel mesh has higher cost, so that the screen cost is higher, and in order to reduce the cost of the screen, the preparation of the mesh skeleton layer 100 may include the following steps:
s201, cutting according to a first preset size to obtain the steel wire mesh.
S202, cutting according to a second preset size to obtain a polyester net, wherein the first preset size is smaller than the second preset size.
In order to obtain more standardized wire mesh and polyester mesh sizes, a computer (computer) with calculation and programming functions may be used to calculate the wire mesh and polyester mesh sizes before cutting the wire mesh and polyester mesh to make the cut sizes more standardized. The present application does not limit the order of S201 and S202.
S203, performing net-stretching operation on the polyester net through a net-stretching machine.
In order to ensure that the polyester net can reach the tension required by the screen, the net-stretching time can be 72 hours, and of course, the specific net-stretching time can be adjusted according to the requirement, and the net-stretching time is not limited in the application.
S204, superposing the steel wire mesh on the polyester mesh.
The steel mesh may be placed in the middle of the polyester mesh.
S205, sticking the steel wire mesh to the middle of the polyester mesh in an edge sticking mode. Specifically, an adhesive is coated on the edge of the steel wire mesh to bond and fix the edge of the steel wire mesh with the polyester mesh. The adhesive may be a hot melt adhesive.
S206, cutting off the area of the polyester net opposite to the non-adhesive area of the steel wire net, and surrounding the non-adhesive area by the edge adhesive area of the steel wire net.
In this way, the polyester net has tension, and the polyester net can have a pulling effect on the steel wire net positioned in the middle, so that the steel wire net has tension, and further the screen plate has tension.
The mesh-shaped skeleton layer 100 manufactured by the method has the advantages that the steel wire mesh and the polyester mesh are not strictly positioned on the same plane, so that the connection position of the steel wire mesh and the polyester mesh can avoid adverse effect on printing, the size of the steel wire mesh is larger than that of the solar cell, and the solar cell can be positioned under the steel wire mesh in the printing process. Meanwhile, the slurry inlet, the slurry channel and the positive electrode printing pattern are all arranged on the screen plate part corresponding to the steel wire mesh.
Under such circumstances, the cost of the screen plate can be reduced by manufacturing the mesh-like skeleton layer 100 together with the steel wire mesh and the polyester mesh, relative to manufacturing the mesh-like skeleton layer 100 by using all the steel wire mesh.
In the process of storing the steel wire mesh, the steel wire mesh may have lipid substances in order to protect the steel wire mesh, and the lipid substances on the steel wire mesh may react with the slurry, which may affect printing quality.
To solve the above problems, the mesh-type skeleton layer 100 is prepared to further include a degreasing step of wiping the wire mesh with a chemical to remove lipid on the wire mesh. The steel wire mesh can be cleaned by using the medicament, the operation can be performed after the mesh-shaped framework layer 100 is prepared, and the whole mesh-shaped framework layer 100 can be placed in a medicament pool for cleaning, so that lipid on the steel wire mesh can be removed, and the polyester mesh can be cleaned.
In the process of forming the slurry inlet on the first surface of the screen blank, forming the concave positive electrode printing pattern on the second surface of the wear-resistant layer 200 opposite to the mesh-shaped skeleton layer 100, and forming the slurry channel communicating the positive electrode printing pattern and the slurry inlet in the screen blank, residues may be left in the slurry inlet, the positive electrode printing pattern and the slurry channel, which may cause adverse effects on printing of the positive electrode.
To avoid the above problems, the manufacturing method may further include a washing step of washing the slurry inlet, the positive electrode print pattern, and the residue in the slurry channel. So as to avoid adverse effect of residues on the printing of the positive electrode of the solar cell and ensure the printing performance of the screen printing plate. This step is performed after a slurry inlet is formed in the first surface of the screen blank, a concave positive electrode printing pattern is formed in the second surface of the wear-resistant layer 200 facing away from the mesh-like skeleton layer 100, and a slurry channel is formed in the interior of the screen blank, the slurry channel communicating the positive electrode printing pattern and the slurry inlet.
The forming of the concave positive electrode printing pattern on the second surface of the wear-resistant layer 200 facing away from the mesh-shaped skeleton layer 100 may include the following steps:
first, a film is prepared according to a preset shape of a positive electrode print pattern. The positive electrode print pattern may be drawn by CAD. The shape of the positive electrode printed pattern may be two waves, and of course, the shape of the positive electrode printed pattern may be adjusted according to specific requirements, which is not limited in this application.
And then, placing the film on the second surface, and opening positive electrode printing patterns on the second surface according to the film in a laser mode. In this process, the positive electrode printed pattern may penetrate the abrasion resistant layer 200. The step of forming the positive electrode printing pattern on the second surface according to the film by adopting a laser mode can be performed after the screen blank is manufactured.
In general, the positive electrode printed pattern includes a main grid pattern and a sub grid pattern, the mesh-shaped skeleton layer 100 has a mesh line, and the projection of the mesh line of the mesh-shaped skeleton layer 100 is at least partially overlapped with the projection of the sub grid pattern along the direction perpendicular to the plane of the screen plate, and is not overlapped with the main grid pattern, that is, a part of the mesh line of the mesh-shaped skeleton layer 100 blocks a part of the sub grid pattern and does not block the main grid pattern.
In the process of forming the slurry channel on the screen plate, part of the screen wires of the mesh skeleton layer 100 need to be broken, and because the wear-resistant layer 200 is connected to the mesh skeleton layer 100, the wear-resistant layer 200 is a PI film in the application, and the PI film has a certain wrapping effect on the mesh skeleton layer 100, therefore, if after the screen plate blank is formed by pressing, part of the screen wires of the mesh skeleton layer 100 are broken, the tension release of the mesh skeleton layer 100 is uneven, and the mesh skeleton layer 100 is possibly broken and exploded.
In order to solve the above-mentioned problems, the manufacturing method may further include forming avoiding holes corresponding to the sub-grid patterns on the mesh-shaped skeleton layer 100, that is, punching holes corresponding to the sub-grid patterns on the mesh-shaped skeleton layer 100, and breaking mesh lines of the corresponding sub-grid pattern portion of the mesh-shaped skeleton layer 100, in the mesh-shaped skeleton layer 100, and between the emulsion, the mesh-shaped skeleton layer 100, and the wear-resistant layer 200 in the pressing space of the pressing device. Under the condition, the problem that the mesh skeleton layer 100 bursts due to the fact that part of mesh lines of the mesh skeleton layer 100 are broken in the process of later-stage slurry channel opening can be avoided. Of course, in the above-mentioned scheme, the mesh-like skeleton layer 100 includes a polyester mesh and a steel wire mesh, and the slurry channel is formed on the steel wire mesh, so that the avoidance holes corresponding to the auxiliary grid pattern can be opened on the direct steel wire mesh.
In order to ensure the accuracy of the avoidance holes on the mesh skeleton layer 100, before the avoidance holes are formed, the auxiliary grid patterns can be scanned into a memory, for example, a computer, and the mesh skeleton layer 100 is perforated according to the auxiliary grid patterns in the memory so as to form the avoidance holes on the mesh skeleton layer 100, which accurately correspond to the auxiliary grid patterns.
In order to avoid that the mesh skeleton layer 100 is cracked after being perforated, or that part of the mesh skeleton layer 100 avoiding holes are not successfully perforated, after the mesh skeleton layer 100 is perforated, before the emulsion, the mesh skeleton layer 100 and the wear-resistant layer 200 are arranged in the lamination space of the lamination device, the mesh skeleton layer 100 can be detected, so as to detect whether the mesh skeleton layer 100 is cracked, whether the mesh skeleton layer 100 is flat and whether the secondary grid pattern of the steel wire mesh is complete.
In a further technical scheme, the manufacturing method further comprises the steps of opening a slurry inlet on the first surface of the screen blank, and opening a slurry channel which is communicated with the positive electrode printing pattern and the slurry inlet in the screen blank. Specifically, a slurry inlet can be formed in the first emulsion layer in a laser manner, the solidified emulsion in the avoidance holes can be removed in a laser manner, and part of the meshes of the mesh-shaped framework layer 100 are opened, and the slurry channel comprises part of the meshes and the avoidance holes. In this step, the slurry inlet and the slurry channel may be simultaneously formed on the screen plate by means of laser according to the positive electrode printing pattern on the first surface of the screen plate.
According to the scheme, the positive electrode printing pattern is formed on the second surface according to the film by adopting the laser mode, the positive electrode printing pattern can be formed after lamination, and when the positive electrode printing pattern is formed on the second surface by adopting the laser mode, laser can penetrate through the whole screen, so that the positive electrode printing pattern is formed on the second surface, a slurry inlet is formed on the first surface of the screen, a slurry channel is formed in the screen, the shape of the slurry inlet is the same as that of the positive electrode printing pattern, the shape of the slurry channel is the same as that of the positive electrode printing pattern, and when the laser is perpendicular to the screen, the projection of the slurry inlet in the direction perpendicular to the screen, and the projection of the positive electrode printing pattern in the direction perpendicular to the screen coincide, so that the slurry can more smoothly pass through the screen and flow out of the screen.
In a further technical scheme, the preparation method can further comprise the following steps:
step 301: and detecting finished products of the screen printing plate, and detecting positive electrode printing patterns on the screen printing plate through a microscope and other instruments to detect whether the positive electrode printing patterns are complete. Of course, other instruments may be used to detect the screen, and the application is not limited to a specific detection instrument. This step is performed after the screen plate is provided with the slurry inlet, the slurry channel and the positive electrode printed pattern, that is, after the screen plate blank is formed into the screen plate.
And 302, after finished product detection is completed, a silver dragon adhesive tape can be pasted on the part outside the slurry inlet on the first surface and the positive electrode printing pattern on the second surface of the screen so as to protect the screen, and meanwhile, the silver dragon adhesive tape is prevented from damaging the slurry inlet and the positive electrode printing pattern.
And 303, packaging the screen printing plate finished product.
The application discloses a screen printing positive electrode of a solar cell, which can be manufactured by the manufacturing method, and comprises a first emulsion layer, a net framework layer 100, a second emulsion layer and a wear-resistant layer 200.
Wherein, the first emulsion layer, the reticular framework layer 100, the second emulsion layer and the wear-resistant layer 200 are sequentially stacked and fixedly connected, and a plurality of protrusions or recesses distributed in array are arranged on the first surface of the first emulsion layer, which is opposite to the reticular framework layer 100. The second surface of the wear-resistant layer 200, which is opposite to the reticular framework layer 100, is provided with a concave positive electrode printing pattern, the first surface is provided with a slurry inlet, and the inside of the screen is provided with a slurry channel which is communicated with the slurry inlet and the positive electrode printing pattern. The development process of the beneficial effects generated by the screen printing plate is generally similar to that of the screen printing plate manufactured by the manufacturing method, so that the description is omitted herein.
Further, the mesh-shaped skeleton layer 100 may include a steel wire mesh and a polyester mesh, an opening may be provided in the middle of the polyester mesh, the steel wire mesh may be opposite to the opening, an edge of the steel wire mesh surrounds the opening, and an edge of the steel wire mesh is fixedly connected with the polyester mesh. The slurry inlet, the slurry channel and the positive electrode printing pattern are all arranged on the screen plate part corresponding to the steel wire mesh. Under such circumstances, the cost of the screen plate can be reduced by manufacturing the mesh-like skeleton layer 100 together with the steel wire mesh and the polyester mesh, relative to manufacturing the mesh-like skeleton layer 100 by using all the steel wire mesh.
The first surface is provided with a plurality of protrusions or recesses distributed in an array, that is to say the first surface is a roughened surface, alternatively the surface roughness of the first surface may be 12-16 μm.
Along the direction perpendicular to the screen, the projection of the slurry inlet coincides with the positive electrode print pattern, and the projection of the slurry channel coincides with the positive electrode print pattern. In this case, the slurry can be ensured to flow through the screen plate more smoothly and out of the screen plate.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (10)
1. A method of making a screen printing a positive electrode for a solar cell, comprising:
preparing a mesh-like framework layer (100);
preparing a wear layer (200);
the emulsion, the reticular framework layer (100) and the wear-resistant layer (200) are arranged in a lamination space of a lamination device, the lamination device comprises a first rough layer (330), and the first rough layer (330) is used for enclosing at least part of the lamination space;
performing lamination operation on the emulsion, the mesh skeleton layer (100) and the wear-resistant layer (200) which are arranged in the lamination space to form a screen blank, wherein the screen blank comprises a first emulsion layer, the mesh skeleton layer (100), a second emulsion layer and the wear-resistant layer (200) which are overlapped, and a plurality of protrusions or depressions distributed in an array are formed on the first surface of the first emulsion layer, which is opposite to the mesh skeleton layer (100), by the first rough layer (330);
a slurry inlet is formed in the first surface of the screen plate blank, a concave positive electrode printing pattern is formed in the second surface of the wear-resisting layer (200) which faces away from the reticular framework layer (100), and a slurry channel which is communicated with the positive electrode printing pattern and the slurry inlet is formed in the screen plate blank, so that the screen plate blank forms a screen plate.
2. The method of making as claimed in claim 1, wherein said preparing a mesh-like skeletal layer (100) comprises:
cutting according to a first preset size to obtain a steel wire mesh;
cutting according to a second preset size to obtain a polyester net, wherein the first preset size is smaller than the second preset size;
performing net stretching operation on the polyester net through a net stretching machine;
stacking the steel wire mesh on the polyester mesh;
the steel wire mesh is stuck to the middle of the polyester mesh in an edge sticking mode;
and cutting off the area of the polyester net opposite to the non-adhesive area of the steel wire net, wherein the edge adhesive area of the steel wire net surrounds the non-adhesive area.
3. The method of making as defined in claim 2, wherein the preparing a mesh-like skeletal layer (100) further comprises:
and wiping the steel wire mesh by using a medicament to remove lipid matters on the steel wire mesh.
4. The method of manufacturing according to claim 1, further comprising:
flushing residues in the slurry inlet, the positive electrode printed pattern and the slurry channel.
5. The method according to claim 1, wherein the forming of the concave positive electrode print pattern on the second surface of the wear-resistant layer (200) facing away from the mesh-like skeleton layer (100) includes:
preparing a film according to the preset shape of the positive electrode printing pattern;
and placing the film on the second surface, and opening the positive electrode printing pattern on the second surface according to the film by adopting a laser mode.
6. The manufacturing method according to claim 1, wherein the positive electrode print pattern includes a main gate pattern and a sub gate pattern;
the manufacturing method of the wear-resistant layer (200) comprises the steps of preparing a reticular framework layer (100), and arranging emulsion, the reticular framework layer (100) and the wear-resistant layer (200) in a lamination space of a lamination device, wherein the manufacturing method further comprises the following steps: forming avoidance holes corresponding to the auxiliary grid patterns on the reticular framework layer (100);
a slurry inlet is formed in the first surface of the screen blank, a slurry channel which is communicated with the positive electrode printing pattern and the slurry inlet is formed in the screen blank, and the screen blank comprises:
the slurry inlet is formed in the first emulsion layer in a laser mode, the solidified emulsion in the avoidance holes is removed in a laser mode, partial meshes of the net-shaped framework layer (100) are opened, and the slurry channel comprises the partial meshes and the avoidance holes.
7. A screen of a positive electrode of a printed solar cell made according to any one of claims 1-6, comprising a first emulsion layer, a mesh backbone layer (100), a second emulsion layer and a wear layer (200), wherein:
the first emulsion layer, the reticular framework layer (100), the second emulsion layer and the wear-resistant layer (200) are sequentially overlapped and fixedly connected, and a plurality of protrusions or depressions distributed in an array are arranged on the first surface of the first emulsion layer, which is opposite to the reticular framework layer (100);
the second surface of the wear-resistant layer (200) facing away from the reticular framework layer (100) is provided with a sunken positive electrode printing pattern, the first surface is provided with a slurry inlet, and the inside of the screen is provided with a slurry channel which is communicated with the slurry inlet and the positive electrode printing pattern.
8. Screen according to claim 7, characterized in that the mesh skeleton layer (100) comprises a steel mesh and a polyester mesh, the polyester mesh being provided with openings, at least part of the steel mesh being opposite to the openings, the edges of the steel mesh surrounding the openings, and the edges of the steel mesh being fixedly connected to the polyester mesh.
9. The screen of claim 7, wherein the projection of the slurry inlet coincides with the positive electrode print pattern and the projection of the slurry channel coincides with the positive electrode print pattern in a direction perpendicular to the screen.
10. The screen of claim 7, wherein the first surface has a surface roughness of 12-16 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210290501.2A CN114714750B (en) | 2022-03-23 | 2022-03-23 | Method for manufacturing screen printing plate for printing positive electrode of solar cell and screen printing plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210290501.2A CN114714750B (en) | 2022-03-23 | 2022-03-23 | Method for manufacturing screen printing plate for printing positive electrode of solar cell and screen printing plate |
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| CN114714750A CN114714750A (en) | 2022-07-08 |
| CN114714750B true CN114714750B (en) | 2024-03-26 |
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| JP2010115856A (en) * | 2008-11-13 | 2010-05-27 | Panasonic Corp | Screen printing apparatus and plasma display panel |
| JP2016078393A (en) * | 2014-10-21 | 2016-05-16 | ミタニマイクロニクス株式会社 | Screen mask, and method for manufacturing screen mask |
| JP2017100367A (en) * | 2015-12-02 | 2017-06-08 | ミタニマイクロニクス九州株式会社 | Screen mask and method for producing screen mask |
| CN107443882A (en) * | 2016-06-01 | 2017-12-08 | 仓和股份有限公司 | Printing screen plate with protective layer and preparation method thereof |
| CN210911628U (en) * | 2019-08-30 | 2020-07-03 | 苏州阿特斯阳光电力科技有限公司 | Solar cell printing screen |
| CN211730624U (en) * | 2019-12-16 | 2020-10-23 | 苏州阿特斯阳光电力科技有限公司 | Solar cell printing screen |
| CN112319023A (en) * | 2020-12-07 | 2021-02-05 | 江苏盛矽电子科技有限公司 | Double-sided structure printing screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010115856A (en) * | 2008-11-13 | 2010-05-27 | Panasonic Corp | Screen printing apparatus and plasma display panel |
| JP2016078393A (en) * | 2014-10-21 | 2016-05-16 | ミタニマイクロニクス株式会社 | Screen mask, and method for manufacturing screen mask |
| JP2017100367A (en) * | 2015-12-02 | 2017-06-08 | ミタニマイクロニクス九州株式会社 | Screen mask and method for producing screen mask |
| CN107443882A (en) * | 2016-06-01 | 2017-12-08 | 仓和股份有限公司 | Printing screen plate with protective layer and preparation method thereof |
| CN210911628U (en) * | 2019-08-30 | 2020-07-03 | 苏州阿特斯阳光电力科技有限公司 | Solar cell printing screen |
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| CN114714750A (en) | 2022-07-08 |
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