CN103171256A - Solar cell electrode printing mask plate and manufacturing method thereof - Google Patents
Solar cell electrode printing mask plate and manufacturing method thereof Download PDFInfo
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- CN103171256A CN103171256A CN2011104361109A CN201110436110A CN103171256A CN 103171256 A CN103171256 A CN 103171256A CN 2011104361109 A CN2011104361109 A CN 2011104361109A CN 201110436110 A CN201110436110 A CN 201110436110A CN 103171256 A CN103171256 A CN 103171256A
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Abstract
The invention relates to a solar cell electrode printing mask plate and a manufacturing method thereof. The solar cell electrode printing mask plate comprises a multiple-layer structure which is at least composed of a first electroforming layer and a second electroforming layer, and main gird lines and fine gird lines are arranged on the first electroforming layer and the second electroforming layer. According to the solar cell electrode printing mask plate and the manufacturing method thereof, the problems that silk nets are woven in an interwove and overlapped mode, and a gird line printed by a single-layer solar mask plate is in a gourd shape are resolved, the quality of printing is improved, the depth-width ratio of the fine gird lines is effectively improved, and the conversion efficiency of solar energy is improved. Besides, the solar cell electrode printing mask has broad market prospects.
Description
Technical field
A kind of electrode of solar battery printing mask board and the manufacture method thereof that the present invention relates to belong to the solar cell print field.
Background technology
Serigraphy is that silk fabrics, synthetic fabrics or woven wire are stretched tight on screen frame, adopts manual method of carving paint film or photochemistry plate-making to make screen printing forme.Modern screen printing technique is to utilize photosensitive material to make screen printing forme (making the silk screen hole of picture and text part on screen printing forme is through hole, and the silk screen hole of non-graphic part is plugged) by photomechanical method.By the extruding of scraper plate, printing ink is transferred on stock by the mesh of picture and text part during printing, formed the picture and text the same with original copy.Screen printing apparatus is simple, easy to operate, prints, makes a plate and be simple and easy and with low cost, strong adaptability.
Serigraphy originates from China the earliest, apart from the history of modern existing more than 2,000 year.Folder a word used in person's names printing method has just appearred period as far back as the Qin Han of Ancient Times in China.Generally popular to the Eastern Han Dynasty folder a word used in person's names batik method, and the level of printed product also is improved.Between year, people begin to carry out stamp with the frame of the tulle that stretches tight to the Sui Dynasty great cause, make folder a word used in person's names printing technology develop into screen printing.According to history records records, the exquisite dress ornament of wearing in the imperial palace during Tang Dynasty just has to be printed in this way.To the Song dynasty serigraphy development has been arranged again, and improved the oil paint of original use, beginning adds the rubber powder of starch based in dyestuff, make it become slurry and carry out serigraphy, makes the color of serigraphy product more gorgeous.
Screen printing is an invention greatly of China.U.S.'s " serigraphy " magazine had such commentary to Chinese screen printing technique: " prove that on evidence Chinese just used horse-hair and template in the past in bimillennium.The uniforms card at Ming Dynasty's initial stage understands their competitive spirit and process technology." invention of screen printing, promoted the development of world mankind material progresses.Today after bimillennium, the screen printing technique development is perfect, has now become an indispensable part in the human lives.
Serigraphy not only adapts to general paper printing, and adaptability is very extensive.Such as: pottery, glass, printed substrate etc.Different according to the quality of stock, just be not quite similar during printing, although inseparable inner link is arranged between each series, because of stock quality different (being that chemical property is different with physical property), its particularity is separately arranged again separately.So people by the stock different demarcation are usually: several large classes such as paper printing, Plastic printing, ceramic-like printing, category of glass printing, wiring board printing, metal species printing, textile printing.So just formed relatively independent print system separately.
One of process for manufacturing circuit board, on the screen cloth of existing negativity pattern, scrape with scraper and extrude appropriate printing ink (namely hindering agent), see through local screen cloth and form positive pattern, printing on the smooth copper face of substrate, consist of a kind of resistance agent of covering, for follow-up optionally etching or electroplating processes are prepared in advance.The mode of this transfer is commonly referred to as " screen painting " and claims again " serigraphy ".
Under the background of global warming, become global focus take low energy consumption, the low pollution as " low-carbon economy " on basis.Energy-saving and emission-reduction are imperative, and low carbon development has become the inexorable trend of social development gradually, and a kind of attitude, a kind of obligation, a kind of responsibility especially are not only in the low-carbon (LC) life.The utilization of solar energy occupies consequence in the process of pursuing low-carbon (LC), solar cell is exactly the core representative that solar energy utilizes.
But traditional electrode of solar battery printing is to adopt common silk screen plate to print, and generally more than 70um, this has seriously limited the raising of solar cell conversion ratio to the wire diameter of its thin grid line printing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electrode of solar battery printing mask board, this mask can print out the thin grid line that wire diameter is little, depth-width ratio is large, reduce the resistance of grid line, increased silicon plate light-receiving area, improved the electricity conversion of solar cell.
In order to solve the problems of the technologies described above, the technical scheme that the present invention takes is as follows:
A kind of electrode of solar battery printing mask board is characterized in that, comprises sandwich construction, is made of ground floor and second layer electroformed layer at least, is provided with main grid line and thin grid line on described electroformed layer.
The main grid line of ground floor electroformed layer connects by bridging with the grid line of being connected.
Be provided with the array point that conductive silver paste can't see through on the main grid line bridging connection network of ground floor electroformed layer.
The graphics shape of described array point is circle, rhombus, rectangle, square, triangle or polygon.
The main grid line of second layer electroformed layer connects without bridging with the grid line of being connected.
Mask also comprises the 3rd layer of electroformed layer, and the main grid line of the 3rd layer of electroformed layer connects without bridging with the grid line of being connected.
Mask also comprises the 4th layer of electroformed layer, and the main grid line of the 4th layer of electroformed layer connects without bridging with the grid line of being connected.
The width of described thin grid line is less than 70 microns.
Described mask is by being stainless steel mask, nickel metallic mask, nickel based metal mask or other metallic mask
Be provided with in described mask edge arrange according to certain rules lateral opening.
Described mask directly is fixed on screen frame.
Described mask is fixed on screen frame after by screen tension.
A kind of preparation method of electrode of solar battery printing mask board is characterized in that, comprises the following steps:
The first step: core film pre-treatment;
Second step: ground floor electroformed layer moulding;
The 3rd step: second layer electroformed layer moulding;
The 4th step: the above electroformed layer moulding of the second layer;
The 5th step: move back film;
The 6th step: fixing.
Described first step technique: in core is carried out pre-treatment, make core film surface cleaning smooth; Described second step technique: evenly be coated with one deck light-sensitive surface on the core of a light face, by exposure machine, the electrode mask ground floor figure of solar cell is transferred to above photosensitive dry film, the series of processes such as cleaning, drying of developing after exposure, unexposed place dry film is cleaned dissolve, stay the electrode mask graph of solar cell, the core of making figure is put into carries out the electro-deposition moulding in electroforming solution, take out the core that one deck electroformed layer is arranged when reaching expection thickness from electroforming solution; Described three step process: taking out has the core of electroformed layer through operations such as pre-treatment sandblast, cleanings, core cast layer surface uniform coating one deck light-sensitive surface of electroformed layer is being arranged, again with exposure machine, the figure of the electrode mask second layer of solar cell is transferred to above photosensitive dry film, repeat the electroforming process, when electroformed layer reaches expection thickness, take out the core film; Described the 4th step process: carry out two-layer above electroformed layer as need, repeated for the 3rd step, wherein each exposure figure is done certain change with the needs of electroformed layer, and the thickness of every layer of electroformed layer also adjusts according to the related process parameter; Described the 5th step process: utilize ultrasonic washing and other related process to take off film and process, and will move back the complete multilayer electroforming mask of film from core film sur-face peeling; Described the 6th step process: directly be fixed on screen frame on by methods such as welding or glue the mask that strips down, can be also by being fixed on screen frame with methods such as welding or glue after screen tension, described screen frame is metal frame or nonmetal frame, described metal frame is aluminium frame or rust steel framework, and described silk screen is woven wire or polyester net.
Electrode of solar battery printing mask board provided by the invention can overcome conventional solar cell serigraphy mask electrode precision relatively poor, and depth-width ratio is difficult to improve, and thin grid line is difficult to make the limitation on fine rule road due to the cause of establishment silk screen; And can solve individual layer solar energy printing mask board and print out the lageniform bad phenomenon of thin grid line silver slurry.The electrode of solar battery printing mask board that the present invention makes can print out the thin grid line of small size electrode, and the thin grid line silver slurry width that prints out can be controlled in 70um, and the more smooth homogeneity of surface ratio of thin grid line is good, and the grid line depth-width ratio is large.These change and have effectively reduced the light-receiving area loss that causes because the silicon chip surface grid line is wide and the resistance that has reduced grid line, have increased silicon plate light-receiving area, reduce the loss that causes when collecting electric current, and then have improved the electricity conversion of battery.The invention solves interweave overlapping establishment, individual layer solar energy of silk screen and print out the problem of grid line calabash shaped phenomenon, promoted printing quality; Effectively improve thin grid line depth-width ratio, promote solar conversion efficiency.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is ground floor electroformed layer schematic diagram;
Fig. 2 is second layer electroformed layer schematic diagram;
Fig. 3 is the mask that is provided with array point;
Fig. 4 is provided with lateral opening mask;
Fig. 5 is for directly being fixed on the mask on screen frame;
Fig. 6 stretches tight to be fixed on mask on screen frame after net;
Fig. 7 is mask fabrication processing figure.
In figure 1 for the enlarged diagram, 2 for ground floor electroformed layer main grid line and thin grid line be second layer electroformed layer main grid line with the enlarged diagram of thin grid line, 3 enlarged diagrams for main grid line and thin grid line, 4 for array point, 5 be lateral opening.
The specific embodiment
Embodiment 1:
Shown in Figure 7 is the flow chart of one embodiment of the present of invention, and related mask is double-layer structure, and concrete scheme is as follows:
A, the stainless steel core is carried out pre-treatment, make core film surface cleaning smooth.
B, on the stainless steel core even coating one deck light-sensitive surface; By exposure machine, the electrode mask ground floor figure of solar cell is transferred to above photosensitive dry film; The series of processes such as cleaning, drying of developing after exposure, unexposed place dry film is cleaned dissolve, stay the electrode mask graph of solar cell, the thin grid line of electrode of solar battery mask ground floor is all to be connected by the bridging between grid line with the main grid line, and mask graph is corresponding with it; The core of making figure is put into carries out the electro-deposition moulding in electroforming solution, take out the core that one deck electroformed layer is arranged when reaching expection thickness from electroforming solution.Figure 1 shows that electroforming electrode of solar battery mask ground floor floor map, 1 is the enlarged diagram of ground floor electroformed layer main grid line and thin grid line.
C, taking-up have the core of electroformed layer through operations such as pre-treatment sandblast, cleanings; Core cast layer surface uniform coating one deck light-sensitive surface of electroformed layer is being arranged; Again with exposure machine, the figure of the electrode mask second layer of solar cell is transferred to above photosensitive dry film, connect without bridging between the thin grid line of the electrode of solar battery mask second layer and main grid line, it is complete hollow out, mask graph is corresponding with it, repeat the electroforming process, when electroformed layer reaches expection thickness, take out the core film.Figure 2 shows that electroforming electrode of solar battery mask second layer floor map, 2 is the enlarged diagram of second layer electroformed layer main grid line and thin grid line.
D, utilize ultrasonic washing and other related process to take off film to process, and will move back the complete multilayer electroforming mask of film from core film sur-face peeling.
E, the mask of making directly are fixed on screen frame by welding manner; Described screen frame is solid metal aluminium frame.Figure 5 shows that the electrode of solar battery mask that directly is welded on screen frame.(mask of making also can be tightened by polyester webs and be fixed on hollow stainless steel screen frame with the gluing method of glue afterwards.Be fixed on electrode of solar battery mask on screen frame after Figure 6 shows that the net that stretches tight)
Embodiment 2:
Be provided with the array point that conductive silver paste can't see through on the main grid line of mask, the graphics shape of array point can be any shape, as circle, rhombus, rectangle, square, triangle, polygon etc., is preferably circle; Described array point be shaped as circle the time, circular diameter is 50um～1mm, described array point be shaped as rectangle the time, the length of side of circle is 50um～1mm, described array point be shaped as triangle the time, the leg-of-mutton length of side is 50um～1mm; Described array dot center spacing is 50um～1mm; Described array point be expert at (perhaps row) and main grid line parallel, vertical or at an angle.Fig. 3 is the mask that is provided with array point; 3 is the enlarged diagram of main grid line and thin grid line, and the graphics shape of array point 4 is circular, and diameter is 50um, and the center of circle spacing of any two adjacent circles is 125um; 4 of described array points are expert at and are 60 ° of angles with main grid line parallel, column and main grid line main body.
Embodiment 3:
Figure 4 shows that a kind of lateral opening mask schematic diagram that is provided with.This mask edge is provided with arrange according to certain rules lateral opening; The lateral opening of mask can be any shape, is preferably circle; Being parallel to the limit near every limit of described mask has two rows lateral opening, and every row equidistantly disperses; Described lateral opening be to be fixed in frame for mask is fixed on frame or by silk screen with glue.
Above embodiment purpose is to illustrate the present invention, and unrestricted protection scope of the present invention, all application that come by simple change of the present invention all drop in protection scope of the present invention.
Claims (14)
1. an electrode of solar battery printing mask board, is characterized in that, comprises sandwich construction, is made of ground floor and second layer electroformed layer at least, is provided with main grid line and thin grid line on described electroformed layer.
2. electrode of solar battery printing mask board according to claim 1, is characterized in that, the main grid line of ground floor electroformed layer connects by bridging with the grid line of being connected.
3. electrode of solar battery printing mask board according to claim 2, is characterized in that, is provided with the array point that conductive silver paste can't see through on the main grid line bridging connection network of ground floor electroformed layer.
4. electrode of solar battery printing mask board according to claim 3, is characterized in that, the graphics shape of described array point is circle, rhombus, rectangle, square, triangle or polygon.
5. electrode of solar battery printing mask board according to claim 1, is characterized in that, the main grid line of second layer electroformed layer connects without bridging with the grid line of being connected.
6. electrode of solar battery printing mask board according to claim 5, is characterized in that, also comprises the 3rd layer of electroformed layer, and the main grid line of the 3rd layer of electroformed layer connects without bridging with the grid line of being connected.
7. electrode of solar battery printing mask board according to claim 6, is characterized in that, also comprises the 4th layer of electroformed layer, and the main grid line of the 4th layer of electroformed layer connects without bridging with the grid line of being connected.
8. according to claim 1-7 described electrode of solar battery printing mask boards of any one, is characterized in that, the width of described thin grid line is less than 70 microns.
9. according to claim 1-7 described electrode of solar battery printing mask boards of any one, is characterized in that, described mask is nickel metallic mask, nickel based metal mask or other metallic mask.
10. according to claim 1-7 described electrode of solar battery printing mask boards of any one, is characterized in that, be provided with in described mask edge arrange according to certain rules lateral opening.
11. according to claim 1-7 described electrode of solar battery printing mask boards of any one is characterized in that described mask directly is fixed on screen frame.
12. according to claim 1-7 described electrode of solar battery printing mask boards of any one is characterized in that, described mask is fixed on screen frame after by screen tension.
13. the preparation method of an electrode of solar battery printing mask board is characterized in that, comprises the following steps:
The first step: core film pre-treatment;
Second step: ground floor electroformed layer moulding;
The 3rd step: second layer electroformed layer moulding;
The 4th step: the above electroformed layer moulding of the second layer;
The 5th step: move back film;
The 6th step: fixing.
14. the preparation method of a kind of electrode of solar battery printing mask board according to claim 13 is characterized in that, described first step technique: core is carried out pre-treatment, make core film surface cleaning smooth; Described second step technique: evenly be coated with one deck light-sensitive surface on the core of a light face, by exposure machine, the electrode mask ground floor figure of solar cell is transferred to above photosensitive dry film, the series of processes such as cleaning, drying of developing after exposure, unexposed place dry film is cleaned dissolve, stay the electrode mask graph of solar cell, the core of making figure is put into carries out the electro-deposition moulding in electroforming solution, take out the core that one deck electroformed layer is arranged when reaching expection thickness from electroforming solution; Described three step process: taking out has the core of electroformed layer through operations such as pre-treatment sandblast, cleanings, core cast layer surface uniform coating one deck light-sensitive surface of electroformed layer is being arranged, again with exposure machine, the figure of the electrode mask second layer of solar cell is transferred to above photosensitive dry film, repeat the electroforming process, when electroformed layer reaches expection thickness, take out the core film; Described the 4th step process: carry out two-layer above electroformed layer as need, repeated for the 3rd step, wherein each exposure figure is done certain change with the needs of electroformed layer, and the thickness of every layer of electroformed layer also adjusts according to the related process parameter; Described the 5th step process: utilize ultrasonic washing and other related process to take off film and process, and will move back the complete multilayer electroforming mask of film from core film sur-face peeling; Described the 6th step process: directly be fixed on screen frame on by methods such as welding or glue the mask that strips down, can be also by being fixed on screen frame with methods such as welding or glue after screen tension, described screen frame is metal frame or nonmetal frame, described metal frame is aluminium frame or rust steel framework, and described silk screen is woven wire or polyester net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110436110.9A CN103171256B (en) | 2011-12-23 | 2011-12-23 | Electrode of solar battery printing mask board and manufacture method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110436110.9A CN103171256B (en) | 2011-12-23 | 2011-12-23 | Electrode of solar battery printing mask board and manufacture method thereof |
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| CN103171256A true CN103171256A (en) | 2013-06-26 |
| CN103171256B CN103171256B (en) | 2015-09-23 |
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Cited By (3)
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| CN103770452A (en) * | 2014-01-26 | 2014-05-07 | 昆山允升吉光电科技有限公司 | Metal wire mesh |
| CN104029469A (en) * | 2014-06-04 | 2014-09-10 | 浙江尖山光电股份有限公司 | Screen printing plate for solar battery and method of manufacturing solar battery |
| CN104275915A (en) * | 2014-10-31 | 2015-01-14 | 英利集团有限公司 | Production method of solar battery screen printing plate and solar battery screen printing plate |
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