Laser transfer apparatus and photovoltaic cell production line

Abstract

The application relates to a laser transfer printing device and a photovoltaic cell production line. The laser transfer printing device can comprise a horizontal conveying mechanism, a printing device, a laser processing device and a surface processing device. The laser transfer printing device comprises at least one bearing structure, each bearing structure is used for bearing a transfer substrate and driving the transfer substrate to convey on a horizontal plane. The transfer substrate comprises a front surface with a planar side surface and a back surface with a light-transmitting side surface. The surface processing device is arranged at a surface processing station and is used for performing surface processing on the transfer substrate when the transfer substrate needs to be processed. Because the transfer substrate is planar, the paste on the transfer substrate is not easy to remain after transfer, cleaning is convenient, and recycling is facilitated. The surface processing device can process the transfer substrate, so that the transfer substrate can be processed in time when there is residue after transfer, and then the transfer substrate can be continuously used, the utilization rate of the transfer substrate is improved, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of solar cell production equipment technology, and in particular to a laser transfer printing device and a photovoltaic cell production line. Background Technology

[0002] In the solar cell manufacturing process, after the core functional layer is fabricated, electrode grid lines need to be further fabricated on its surface. This step directly affects the photoelectric conversion efficiency and current collection capability of the cell. Currently, the mainstream grid line fabrication technologies are printing (such as screen printing) and electroplating. Among them, screen printing occupies a high market share in global photovoltaic metallization due to its mature technology and low cost. However, due to the characteristics of the solar cell substrate and the process principle, the grid lines prepared by these traditional methods are difficult to overcome the high aspect ratio bottleneck. For example, the aspect ratio of screen-printed grid lines is usually below 24%, and grid breakage is prone to occur when the line width is reduced to below 30μm, resulting in an increased shading area and higher silver paste consumption, which restricts the improvement of cell performance.

[0003] To overcome this limitation, the industry has developed a composite process of "printing pre-placement - laser transfer": first, conductive paste is printed into a substrate with a grooved pattern, and then laser scanning is used to precisely transfer the paste to the surface of the solar cell. This technology can break through the linewidth limit of traditional screen printing, achieving fine grid lines below 25μm, significantly optimizing the aspect ratio and reducing paste consumption. However, existing solutions have significant drawbacks: regardless of whether glass, flexible film, or polymer substrates are used, the grooved structure on the surface is prone to paste residue after transfer, and the residue is difficult to clean thoroughly. This not only leads to low substrate reusability, but also causes material fatigue in flexible film substrates due to long-term use, further reducing process precision and ultimately increasing production costs. Utility Model Content

[0004] Therefore, it is necessary to provide a laser transfer device to address the above problems, such as excessive substrate residue, inconvenient cleaning, and low reusability in existing technologies.

[0005] On one hand, this application provides a laser transfer device, comprising:

[0006] A horizontal conveying mechanism includes at least one supporting structure, each of which carries a transfer substrate and drives the transfer substrate to be conveyed on a horizontal plane; the horizontal conveying mechanism has a transfer station, a surface treatment station and a printing station along the conveying direction; wherein the transfer substrate includes a front surface with one side being a flat surface and a back surface with the other side being a light-transmitting surface;

[0007] A printing device, located at the printing station, is used to print paste on the front side of the transfer substrate;

[0008] A laser processing device, disposed at the transfer station, is used to irradiate the back side of the transfer substrate and transfer the paste on the transfer substrate to the substrate when the transfer substrate is transported to the transfer station; and

[0009] A surface treatment apparatus is provided at the surface treatment station for performing surface treatment on the transfer substrate when the transfer substrate requires treatment.

[0010] Optionally, the surface treatment apparatus includes:

[0011] A nozzle, disposed at the surface treatment station, is used to spray cleaning liquid or gas onto the transfer substrate; and / or

[0012] A scraper, located at the surface treatment station, is used to scrape off any residual slurry on the transfer substrate.

[0013] Optionally, the horizontal conveying mechanism further includes a first shooting station, which is located between the surface treatment station and the transfer station;

[0014] A first imaging component is also provided at the first imaging station. The first imaging component is used to photograph the transfer substrate after the transfer is completed, and to determine whether the slurry of the transfer substrate can be transferred again.

[0015] Optionally, the horizontal conveying mechanism further includes a second shooting station, which is located between the printing station and the transfer station, and in the rotation direction of the horizontal conveying mechanism, the second shooting station is located downstream of the printing station. A second shooting component is provided at the second shooting station, which is used to capture the quality of the paste printed on the front side of the transfer substrate.

[0016] Optionally, it also includes:

[0017] A first conveyor line is used to convey the unprinted transfer substrate;

[0018] At least one first transfer mechanism is disposed between the first conveyor line and the horizontal conveyor mechanism for transferring the transfer substrate on the first conveyor line to the printing station of the horizontal conveyor mechanism.

[0019] Optionally, it further includes a substrate transport line, the substrate transport line comprising:

[0020] A second conveyor line is located in front of the transfer station to transport the unprinted substrate to the front of the transfer station.

[0021] The third conveyor line is located behind the transfer station to convey the substrate that has been transferred out from the rear of the transfer station.

[0022] At least one second transfer mechanism, each of which reciprocates between the rear end of the second conveyor line and the front end of the third conveyor line to transfer the substrate from the second conveyor line to the transfer station for transfer, and then transports the substrate after transfer to the third conveyor line, and adjusts the position of the substrate according to the position of the slurry.

[0023] Optionally, each of the first transfer mechanism and each of the second transfer mechanisms includes:

[0024] At least one support platform is provided for supporting the substrate and the transfer substrate;

[0025] A first drive mechanism is connected to the support platform to drive the support platform to rotate;

[0026] The second drive mechanism is connected to the first drive mechanism to drive the first drive mechanism and the support platform to move along the direction perpendicular to the conveying direction of the conveying line on the horizontal plane;

[0027] A third drive mechanism, connected to the second drive mechanism, drives the second drive mechanism, the first drive mechanism, and the support platform to move vertically; and

[0028] The fourth drive mechanism is connected to the third drive mechanism to drive the third drive mechanism, the second drive mechanism, the first drive mechanism and the support platform to move between the first conveyor line and the printing station and between the second conveyor line and the transfer station, respectively.

[0029] Optionally, the horizontal conveying mechanism further includes an adjustment mechanism, which corresponds to the position of the transfer station and is connected to the laser processing device, for adjusting the position of the laser processing device according to the position of the slurry at the transfer substrate and the position of the substrate.

[0030] Optionally, each of the carrier structures includes a rotating mechanism that drives the transfer substrate to rotate relative to the horizontal conveying mechanism, such that when the transfer substrate is at the printing station, it rotates to face the printing device, and when the transfer substrate reaches the transfer station, the face of the transfer substrate faces the substrate.

[0031] On the other hand, this application also provides a photovoltaic cell production line, including the laser transfer equipment described above.

[0032] The transfer substrate of this application has a flat front side. The paste is directly printed onto the front side of the transfer substrate using a printing device, and then transferred to the substrate using a laser processing device. Because the transfer substrate is flat, paste residue is less likely to remain after transfer, making cleaning easier and facilitating recycling. Furthermore, the laser transfer equipment of this application is equipped with a surface treatment device. This surface treatment device can treat the transfer substrate, allowing any residue to be promptly removed and reused, thus improving the utilization rate of the transfer substrate and reducing costs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a laser transfer device provided in one embodiment of this application.

[0034] Figure 2 This is a partially enlarged schematic diagram of a laser transfer device provided in one embodiment of this application.

[0035] Figure 3 This is a schematic diagram of the structure of a surface treatment apparatus provided in one embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the structure of a first transfer mechanism or a second transfer mechanism provided in one embodiment of this application.

[0037] Figure 5 This is a schematic diagram of the laser processing apparatus and adjustment structure provided in one embodiment of this application.

[0038] Explanation of reference numerals in the attached figures

[0039] 100. Laser transfer equipment; 110. Horizontal conveying mechanism; 111. Bearing structure; 112. Rotating mechanism; 120. Printing device; 130. Laser processing device; 131. Adjusting mechanism;

[0040] 140. Surface treatment device; 141. Spray head; 142. Scraper; 143. First driving component; 144. Second driving component;

[0041] 150. First transfer mechanism; 151. Support platform; 152. First drive mechanism; 153. Second drive mechanism; 154. Third drive mechanism; 155. Fourth drive mechanism;

[0042] 200. Substrate;

[0043] 300, substrate conveying line; 310, second conveying line; 320, third conveying line; 330, second transfer mechanism;

[0044] A. Transfer station; B. Surface treatment station; C. Printing station; D. First shooting station; E. Second shooting station; F. Third shooting station; G. Fourth shooting station. Detailed Implementation

[0045] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0046] As a specific embodiment of this application, such as Figure 1 and Figure 2 As shown, this embodiment provides a laser transfer printing device 100. The laser transfer printing device 100 may include a horizontal conveying mechanism 110, a printing device 120, a laser processing device 130, and a surface treatment device 140. The horizontal conveying mechanism 110 may include at least one supporting structure 111, each supporting structure 111 for carrying a transfer substrate and driving the transfer substrate to be conveyed horizontally. The horizontal conveying mechanism 110 has a transfer station A, a surface treatment station B, and a printing station C along the conveying direction. The transfer substrate includes a front surface with one planar surface and a back surface with the other surface being translucent. The printing device 120 is disposed at printing station C for printing paste onto the front surface of the transfer substrate. The laser processing device 130 is disposed at transfer station A for irradiating the back surface of the transfer substrate and transferring the paste on the transfer substrate to a substrate 200 located below the transfer substrate when the transfer substrate is conveyed to transfer station A. The surface treatment device 140 is disposed at surface treatment station B for performing surface treatment on the transfer substrate when surface treatment is required.

[0047] Specifically, in this embodiment, the front side of the transfer substrate is flat. The paste is directly printed onto the front side of the transfer substrate by the printing device 120, and then transferred to the substrate 200 by the laser processing device 130. Because the transfer substrate is flat, the paste on the transfer substrate is less likely to remain after transfer, making cleaning convenient and facilitating recycling. In addition, the laser transfer equipment in this embodiment is also equipped with a surface treatment device, which can treat the transfer substrate so that any residue can be treated in time after transfer and reused, improving the utilization rate of the transfer substrate and reducing costs.

[0048] Specifically, the transfer substrate in this embodiment can be a glass substrate, with the front side capable of printing the paste and the back side transparent. To ensure a high aspect ratio of the paste printed on the front side of the glass substrate, the front side of the glass substrate can be treated to guarantee that the water droplet angle on the front side of the glass substrate is greater than 100°. Specific treatment methods include preparing an exceptionally hydrophobic and oleophobic film on the front side of the glass substrate, or texturing the front side of the glass substrate to form a textured layer.

[0049] Specifically, the horizontal conveying mechanism 110 in this embodiment can be a horizontal turntable structure, on which multiple (e.g., 4, 6, or 8) support structures 111 can be installed. Each support structure 111 can support one transfer substrate. The turntable structure rotates around a center, causing the support structures 111 to drive the transfer substrate in a cyclical motion between printing station C and transfer station A. Furthermore, the surface treatment station B is located between printing station C and transfer station A, and is downstream of printing station C. This ensures that after the transfer substrate is completed, it is processed by the surface treatment station B before reaching printing station C, keeping the transfer substrate clean during printing.

[0050] As a specific embodiment of this application, such as Figure 3 As shown, the surface treatment apparatus 140 of this embodiment may include a nozzle 141 and / or a scraper 142. The nozzle 141 is disposed at the surface treatment station B and is used to spray cleaning liquid or gas onto the transfer substrate. The scraper 142 is disposed at the surface treatment station B and is used to scrape off residual slurry on the transfer substrate.

[0051] The residual slurry on the transfer substrate is cleaned with a cleaning solution, while the scraper 142 directly scrapes off the slurry on the transfer substrate. When both are used simultaneously, the cleaning solution is first sprayed onto the front of the transfer substrate through the nozzle 141, and then the scraper 142 is used to scrape it off. This allows for faster removal of the slurry from the transfer substrate 200.

[0052] Of course, in other embodiments, the slurry can also be removed by laser.

[0053] The surface treatment device 140 may also include a first driving member 143 and a second driving member 144, which drive the nozzle 141 and the scraper 142 to move in the vertical and horizontal directions respectively, ensuring that the cleaning is carried out smoothly.

[0054] As a specific embodiment of this application, the horizontal conveying mechanism 110 of this embodiment also has a first imaging station D, which is located between the surface treatment station B and the transfer station A. A first imaging component (not shown in the figure, generally one or more CCD cameras) is also provided at the first imaging station D. The first imaging component is used to photograph the transfer substrate after the transfer is completed and to determine whether the slurry of the transfer substrate can be transferred again.

[0055] Specifically, in this embodiment, the first imaging component at the first imaging station D can image the slurry on the transfer substrate. This first imaging station D can coincide with the transfer station A. After the transfer substrate completes its transfer at transfer station A, the first imaging component directly images the slurry on the transfer substrate. When the slurry can still be transferred again, only the substrate 200 already containing slurry is transported away, followed by a clean substrate 200. The slurry on the transfer substrate is then used again to transfer the next substrate 200. This process is repeated until no more slurry needs to be transferred, or the slurry on the transfer substrate can no longer be transferred, at which point the transfer substrate is output from transfer station A.

[0056] In another embodiment, the first imaging station D can be located downstream of the transfer station A. After the transfer substrate is completed, the horizontal conveying mechanism 110 transports the transfer substrate to the first imaging station D. When the slurry at the transfer substrate can still be transferred again, the transfer substrate is then transported to the transfer station A for transfer. This action is repeated until it can no longer be transferred.

[0057] Of course, after the first imaging component images the transfer substrate, it can determine whether there is any slurry remaining on the transfer substrate, and whether there is any slurry residue on the transfer substrate. When there is slurry residue on the transfer substrate, the horizontal conveying mechanism 110 is used to transport the transfer substrate to the surface treatment station B, and the surface treatment device 140 is used to treat the slurry on the transfer substrate.

[0058] The first imaging component in this embodiment may be one or more cameras to capture images of the transfer substrate in real time.

[0059] As another specific embodiment of this application, the horizontal conveying mechanism 110 of this embodiment also has a second shooting station E. The second shooting station E is located between the printing station C and the transfer station A, and in the rotation direction of the horizontal conveying mechanism 110, the second shooting station E is located downstream of the printing station C. A second shooting component (not shown in the figure, similar to the first shooting component, it can be a group or multiple CCD rubbers) is provided at the second shooting station E. The second shooting component is used to shoot the quality of the paste printed on the front side of the transfer substrate.

[0060] The second shooting station E is located downstream of the printing station C, and can determine whether the printing quality of the paste on the transfer substrate by the printing device 120 meets the requirements. When it meets the requirements, the transfer substrate can be conveyed by the horizontal conveying mechanism 110 to the next station (which can be another shooting station or transfer station A). When the printing quality of the transfer substrate does not meet the requirements, it can be directly conveyed to the surface treatment station B for treatment and then reprinted, or it can be directly rejected and cleaned before loading.

[0061] In the laser transfer process, the quality of the paste on the transfer substrate is strongly correlated with the quality of the paste finally transferred to the substrate 200. Its state directly determines the accuracy and performance of subsequent gate line fabrication, thus becoming a core node in process quality control. This embodiment achieves precise control of paste quality by adding a pre-inspection step for the transfer substrate paste, ensuring the fabrication quality of the gate lines on the substrate 200 from the source.

[0062] Compared to the traditional process where inspection is only performed after grid line formation, this embodiment inspects the quality of the paste at the transfer substrate before the transfer process. This avoids rework of the substrate due to defects in the transfer substrate paste, reducing the loss of valuable materials such as silver paste. Furthermore, by ensuring the stability of the grid line's aspect ratio and the consistency of its conductivity, it lays the foundation for the reliability of end products such as photovoltaic cells and semiconductor devices.

[0063] As a specific embodiment of this application, the laser transfer printing equipment 100 of this embodiment may further include a first conveyor line (not shown in the figure, the substrate 200 is an existing conveyor line capable of conveying transfer substrates, such as a belt conveyor line or any other conveying device) and at least one first transfer mechanism 150. The first conveyor line is used to convey unprinted transfer substrates. At least one first transfer mechanism 150 is disposed between the first conveyor line and the horizontal conveyor mechanism 110, and is used to convey the transfer substrate on the first conveyor line to the printing station C of the horizontal conveyor mechanism 110.

[0064] Specifically, in this embodiment, after the transfer substrate is conveyed to the horizontal conveyor mechanism 110, it may be rejected if the printing quality is poor or the cleaning is incomplete. Therefore, it is necessary to replenish the transfer substrate to the horizontal conveyor mechanism 110 to improve the overall production efficiency of the equipment. The first conveyor line in this embodiment is used to convey clean transfer substrates. When the transfer substrate is conveyed to the vicinity of the horizontal conveyor mechanism 110, the first transfer mechanism 150 transfers the substrate to the printing station C of the horizontal conveyor line.

[0065] In this embodiment, there can be one first transfer mechanism 150, which transfers the transfer substrate on the first conveyor line to the horizontal conveyor line and then returns to transfer the next transfer substrate.

[0066] Preferably, the number of first transfer mechanisms 150 in this embodiment can be two or more, which can alternately transport and transfer substrates, thereby improving the overall production efficiency.

[0067] As a specific embodiment of this application, the laser transfer equipment 100 of this embodiment may further include a substrate transport line 300. The substrate transport line 300 may include a second transport line 310, a third transport line 320, and at least one second transfer mechanism 330. The second transport line 310 is located in front of transfer station A to transport the unprinted substrate 200 to the front of transfer station A. The third transport line 320 is located behind transfer station A to transport the transferred substrate 200 out from the rear of transfer station A. Each transfer mechanism reciprocates between the rear end of the second transport line 310 and the front end of the third transport line 320 to transfer the substrate 200 from the second transport line 310 to transfer station A for paste transfer, and then transports the transferred substrate 200 to the third transport line 320, adjusting the position of the substrate 200 according to the paste position.

[0068] Specifically, the substrate transport line 300 in this embodiment is mainly used for transporting the substrate 200 and conveying it to the transfer station A. This transport line innovatively adopts a segmented design, consisting of a second transport line 310, a third transport line 320, and a second transfer mechanism 330. The second transfer mechanism 330 can move flexibly between the two transport lines and can precisely adjust the position of the substrate 200, significantly improving the flexibility and adaptability of the overall transport system.

[0069] This segmented structural design breaks through the layout limitations of traditional integrated conveyor lines. Through the dynamic scheduling capability of the transfer mechanism, it can not only ensure the smooth transition of the substrate 200 in different conveyor sections, but also flexibly adjust the posture of the substrate 200 according to the actual working conditions, providing a more accurate positioning basis for subsequent transfer processes, and effectively improving the overall production line's operating efficiency and process adaptability.

[0070] As a specific embodiment of this application, such as Figure 4As shown, each first transfer mechanism 150 and each second transfer mechanism 330 in this embodiment may include at least one support platform 151, a first drive mechanism 152, a second drive mechanism 153, a third drive mechanism 154, and a fourth drive mechanism 155. At least one support platform 151 is used to support the substrate 200 and the transfer substrate. The first drive mechanism 152 is connected to the support platform 151 to drive the support platform 151 to rotate. The second drive mechanism 153 is connected to the first drive mechanism 152 to drive the first drive mechanism 152 and the support platform 151 to move along the direction of the vertical conveying line in the horizontal plane. The third drive mechanism 154 is connected to the second drive mechanism 153 to drive the second drive mechanism 153, the first drive mechanism 152, and the support platform 151 to move in the vertical direction. The fourth drive mechanism 155 is connected to the third drive mechanism 154 to drive the third drive mechanism 154, the second drive mechanism 153, the first drive mechanism 152 and the support platform 151 to move between the first conveyor line and the printing station C and between the second conveyor line 310 and the transfer station A, respectively.

[0071] In this embodiment, the support platform 151 can be driven to move in three directions and rotate through the first drive mechanism 152, the second drive mechanism 153, the third drive mechanism 154 and the fourth drive mechanism 155, so that the position of the substrate 200 placed on the platform can be well adjusted to meet the requirements of slurry transfer.

[0072] As a specific embodiment of this application, such as Figure 5 As shown, the horizontal conveying mechanism 110 of this embodiment also includes an adjustment mechanism 131. The adjustment mechanism 131 corresponds to the position of the transfer station A and is connected to the laser processing device 130. It is used to adjust the position of the laser processing device 130 according to the position of the slurry and the position of the substrate 200.

[0073] The laser processing device 130 in this embodiment is equipped with an adjustment mechanism 131. During the process of transferring the paste on the transfer substrate to the substrate 200 using laser transfer technology, bidirectional position control between the substrate 200 and the laser processing device 130 can be achieved, providing a core guarantee for the accuracy and stability of the transfer process.

[0074] From a technical perspective, the core of laser transfer is to apply laser pulses to the slurry, causing it to heat up and form droplets or vaporize, which are then precisely deposited on the surface of the substrate 200. This process requires extremely high precision in the relative alignment between the laser focal point and the substrate 200. The adjustment mechanism 131 in this solution can perform multi-dimensional position calibration of the substrate 200, ensuring that the area to be processed is precisely aligned with the laser path. It can also correct the direction and landing point deviation of the laser beam by adjusting the spatial orientation of the laser processing device 130 (e.g., through the coordinated control of the reflector assembly and piezoelectric screws), enabling the laser energy to precisely act on the target slurry area on the substrate. This bidirectional adjustment mechanism effectively solves the problem of traditional single-adjustment methods being susceptible to equipment vibration and thermal deformation, significantly improving the beam positioning stability and substrate 200 alignment accuracy.

[0075] In practical applications, this design can be flexibly adapted to different slurry characteristics (such as viscosity differences) and substrate 200 specifications. By optimizing the relative position of the laser and the substrate 200, it can ensure that the slurry fully absorbs laser energy to form uniform droplets or uniform vaporization, while avoiding damage to the transfer substrate or carbonization of the slurry caused by excessive energy concentration. Ultimately, it achieves a highly efficient and stable transfer effect, laying a high-quality foundation for subsequent processes.

[0076] As a specific embodiment of this application, each carrier structure 111 of this embodiment includes a rotating mechanism 112. The rotating mechanism 112 drives the transfer substrate to rotate relative to the horizontal conveying mechanism 110, so that when the transfer substrate is at the printing station C, it rotates to face the printing device 120, and when the transfer substrate reaches the transfer station A, it rotates to face the substrate 200.

[0077] Specifically, before the transfer substrate reaches the printing station C after being processed at the surface treatment station B, the rotating mechanism 112 can be used to rotate the transfer substrate so that its front side faces the printing device 120. In this embodiment, the printing device 120 is generally located at the printing station C and above the transfer substrate, so the transfer substrate faces upwards at the printing station C. After the transfer substrate has been printed with paste and the paste quality meets the requirements, since the substrate 200 is below the transfer substrate and the laser printing device 120 is above the transfer substrate during transfer, the rotating mechanism 112 will rotate the transfer substrate 180 degrees before it reaches the printing station C, so that the front side of the transfer substrate faces downwards.

[0078] Specifically, the rotating mechanism 112 in this embodiment can be any structure that can drive the transfer base or the supporting structure 111 to rotate, and it is controlled by the driving mechanism.

[0079] As a specific embodiment of this application, the laser transfer equipment 100 of this embodiment is further provided with a third shooting station F between the surface treatment station B and the printing station C, and a third shooting component (not shown in the figure, the third shooting component in this embodiment is also a group or more CCD cameras) is provided at the third shooting station F to shoot whether the transfer substrate is clean. If it is clean, it is then transported to the printing station C. If it is not clean, it needs to be processed again.

[0080] As a specific embodiment of this application, this embodiment also includes a fourth imaging station G between the second imaging station E and the transfer station A. A fourth imaging component (not shown in the figure; in this embodiment, the fourth imaging component is also one or more CCD cameras) is provided at the fourth imaging station G. Once the quality of the slurry at the transfer substrate meets the requirements, the transfer substrate is transported to the fourth imaging station G, where the position of the slurry is captured by the fourth imaging component, providing support for subsequent adjustments to the position of the laser processing device 130 and / or the substrate 200.

[0081] Specifically, the structure and operating principle of the entire laser transfer equipment 100 in this embodiment are as follows:

[0082] The laser transfer equipment 100 may include a first conveyor line for transporting the transfer substrate, a first transfer mechanism 150, and a horizontal conveyor mechanism 110. The first conveyor line transports the clean transfer substrate to the first transfer mechanism 150, which then transfers the substrate from the first conveyor line to the printing station C of the horizontal conveyor mechanism 110. The printing device 120 prints paste on the front side of the transfer substrate. After completion, the horizontal conveyor mechanism 110 transfers the transfer substrate to the second imaging station E, where the second imaging component images the quality of the paste on the transfer substrate. If the quality does not meet the requirements, the substrate is reprinted or rejected. When the quality meets the requirements, the horizontal conveyor mechanism 110 transfers the substrate to the fourth imaging station G, where the fourth imaging component images the position of the paste. The horizontal conveyor mechanism 110 continues to transport the substrate. Before reaching the transfer station A, the rotating mechanism 112 rotates the transfer substrate 180 degrees. Upon reaching the transfer station A, the laser transfer device is activated to transfer the paste from the transfer substrate to the substrate 200. After one paste transfer is completed, the first imaging component detects the paste on the transfer substrate to determine if it can be transferred again. If so, the next transfer continues at the transfer station. If not, it checks for any residual paste on the substrate. If there is no residual paste, the horizontal conveyor 110 directly transfers the substrate to the printing station C. If there is residual paste, the horizontal conveyor 110 transports the substrate to the surface treatment station B, where the surface treatment device 140 treats the surface of the substrate. After treatment, the third imaging component checks whether the substrate is clean. If not, the treatment is repeated or the substrate is rejected. Once clean, the substrate is transported to the printing station C for printing.

[0083] Specifically, the laser transfer equipment 100 in this embodiment further includes a substrate transport line 300, which may include a second transport line 310, a third transport line 320, and a second transfer mechanism 330. The second transport line 310 transports the substrate 200 to the vicinity of the transfer station A. The second transfer mechanism 330 transports the substrate 200 to the transfer station and adjusts the position of the substrate 200. After the transfer is completed, the substrate 200 is transported to the third transport line 320, where it is output. The mechanisms for transporting the transfer substrate and the substrate 200 cooperate with each other so that when the slurry is transferred at the transfer station A, both the transfer substrate and the substrate 200 are transported to the transfer station A, thereby completing the slurry transfer.

[0084] As a specific embodiment of this application, this embodiment provides a photovoltaic cell production line, which may include the laser transfer equipment 100 described above.

[0085] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0086] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0087] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0089] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A laser transfer printing device, characterized in that, include: A horizontal conveying mechanism includes at least one supporting structure, each of which carries a transfer substrate and drives the transfer substrate to be conveyed on a horizontal plane; the horizontal conveying mechanism has a transfer station, a surface treatment station and a printing station along the conveying direction; wherein the transfer substrate includes a front surface with one side being a flat surface and a back surface with the other side being a light-transmitting surface; A printing device, located at the printing station, is used to print paste on the front side of the transfer substrate; A laser processing device, disposed at the transfer station, is used to irradiate the back side of the transfer substrate and transfer the paste on the transfer substrate to the substrate when the transfer substrate is transported to the transfer station; and A surface treatment apparatus is provided at the surface treatment station for performing surface treatment on the transfer substrate when the transfer substrate requires treatment.

2. The laser transfer equipment according to claim 1, characterized in that, The surface treatment apparatus includes: A nozzle, disposed at the surface treatment station, is used to spray cleaning liquid or gas onto the transfer substrate; and / or A scraper, located at the surface treatment station, is used to scrape off any residual slurry on the transfer substrate.

3. The laser transfer equipment according to claim 1, characterized in that, The horizontal conveying mechanism also has a first shooting station, which is located between the surface treatment station and the transfer station. A first imaging component is also provided at the first imaging station. The first imaging component is used to photograph the transfer substrate after the transfer is completed, and to determine whether the slurry of the transfer substrate can be transferred again.

4. The laser transfer equipment according to claim 3, characterized in that, The horizontal conveying mechanism also has a second shooting station, which is located between the printing station and the transfer station. In the rotation direction of the horizontal conveying mechanism, the second shooting station is located downstream of the printing station. A second shooting component is provided at the second shooting station, which is used to capture the quality of the paste printed on the front side of the transfer substrate.

5. The laser transfer equipment according to claim 1, characterized in that, Also includes: A first conveyor line is used to convey the unprinted transfer substrate; At least one first transfer mechanism is disposed between the first conveyor line and the horizontal conveyor mechanism for transferring the transfer substrate on the first conveyor line to the printing station of the horizontal conveyor mechanism.

6. The laser transfer equipment according to claim 5, characterized in that, It also includes a substrate transport line, the substrate transport line comprising: A second conveyor line is located in front of the transfer station to transport the unprinted substrate to the front of the transfer station. The third conveyor line is located behind the transfer station to convey the substrate that has been transferred out from the rear of the transfer station. At least one second transfer mechanism, each of which reciprocates between the rear end of the second conveyor line and the front end of the third conveyor line to transfer the substrate from the second conveyor line to the transfer station for transfer, and then transports the substrate after transfer to the third conveyor line, and adjusts the position of the substrate according to the position of the slurry.

7. The laser transfer equipment according to claim 6, characterized in that, Each of the first transfer mechanism and each of the second transfer mechanisms includes: At least one support platform is provided for supporting the substrate and the transfer substrate; A first drive mechanism is connected to the support platform to drive the support platform to rotate; The second drive mechanism is connected to the first drive mechanism to drive the first drive mechanism and the support platform to move along the direction perpendicular to the conveying direction of the conveying line on the horizontal plane; A third drive mechanism, connected to the second drive mechanism, drives the second drive mechanism, the first drive mechanism, and the support platform to move vertically; and The fourth drive mechanism is connected to the third drive mechanism to drive the third drive mechanism, the second drive mechanism, the first drive mechanism and the support platform to move between the first conveyor line and the printing station and between the second conveyor line and the transfer station, respectively.

8. The laser transfer equipment according to claim 1, characterized in that, The horizontal conveying mechanism also includes an adjustment mechanism, which corresponds to the position of the transfer station and is connected to the laser processing device. The adjustment mechanism is used to adjust the position of the laser processing device according to the position of the slurry at the transfer substrate and the position of the substrate.

9. The laser transfer equipment according to claim 1, characterized in that, Each of the carrier structures includes a rotating mechanism that drives the transfer substrate to rotate relative to the horizontal conveying mechanism, such that when the transfer substrate is at the printing station, it rotates to face the printing device, and when the transfer substrate reaches the transfer station, the face of the transfer substrate faces the substrate.

10. A photovoltaic cell production line, characterized in that, The laser transfer device includes any one of claims 1-9.

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