Laser transfer printing device

Abstract

The utility model discloses a laser transfer printing device which comprises a filling structure, the filling structure is used for filling a transfer printing film with materials and comprises a shell assembly, a first scraper assembly and a second scraper assembly, a first flow channel cavity and a second flow channel cavity which are separated from each other are defined in the shell assembly, the first flow channel cavity is provided with a first feeding port, and the second flow channel cavity is provided with a second feeding port; the first runner cavity is provided with a first feeding port, the second runner cavity is provided with a second feeding port, the first feeding port and the second feeding port are suitable for feeding different materials, the first scraper assembly and the second scraper assembly are arranged at the bottom end of the shell assembly in a spaced mode in the first horizontal direction, and a first material cavity with the bottom open is defined by the first scraper assembly and the shell assembly; the first material cavity is communicated with the first flow channel cavity, the second scraper assembly and the shell assembly define a second material cavity with the bottom open, and the second material cavity is communicated with the second flow channel cavity. According to the laser transfer printing device, the material filling efficiency can be improved, the transfer printing efficiency can be improved, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to a laser transfer device. Background Art

[0002] At present, photovoltaic cell metallization schemes include screen printing, laser transfer, electroplating and other methods. Among them, laser transfer has the advantages of saving slurry and narrow grid line width. Laser transfer is a process in which the printing slurry filled in the groove of the transfer film is irradiated by laser. The surface of the printing slurry dries instantly, and the organic matter evaporates, causing the printing slurry to fall on the surface of the silicon wafer to form grid lines, thereby forming electrodes. Laser transfer has a significant effect on improving the efficiency of solar cells and also has the effect of reducing costs.

[0003] In the related technology, the research on laser transfer of high aspect ratio grid lines mainly focuses on the improvement of printing paste formula. The research is difficult and the transfer efficiency is low. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a laser transfer device, which can improve material filling efficiency, and is conducive to improving transfer efficiency and production efficiency.

[0005] According to the laser transfer device of the embodiment of the present application, it includes a filling structure, which is used to fill the material onto the transfer film, and the filling structure includes: a shell component, the shell component defines a first flow channel cavity and a second flow channel cavity separated from each other, the first flow channel cavity has a first feed port, the second flow channel cavity has a second feed port, the first feed port and the second feed port are suitable for respectively passing different materials; a first scraper component and a second scraper component, the first scraper component and the second scraper component are arranged at the bottom end of the shell component at intervals along a first horizontal direction, the first scraper component and the shell component define a first material cavity with an open bottom, the first material cavity is connected to the first flow channel cavity, the second scraper component and the shell component define a second material cavity with an open bottom, and the second material cavity is connected to the second flow channel cavity.

[0006] According to the laser transfer device of the embodiment of the present application, a plurality of separated flow channel cavities are arranged in the filling structure, and the first flow channel cavity and the second flow channel cavity are suitable for respectively realizing the filling of different materials, so that the filling structure can especially realize the sequential filling of different types of materials. During the production process, there is no need to replace different structures to realize the filling of different materials, which is beneficial to improving the material filling efficiency, thereby facilitating the improvement of the transfer efficiency and the improvement of the production efficiency.

[0007] In some embodiments, the flow area of ​​the first flow channel cavity is smaller than the flow area of ​​the second flow channel cavity; and / or, the first flow channel cavity is indirectly connected to the first material cavity via a throttle valve, and the second flow channel cavity is directly connected to the second material cavity.

[0008] In some embodiments, the shell assembly includes a shell, a first sealing assembly and a second sealing assembly, the first flow channel cavity and the second flow channel cavity are both formed in the shell, the first sealing assembly and the second sealing assembly are both arranged in the shell and protrude downward from the shell, the first scraper assembly protrudes downward from the shell and cooperates with the first sealing assembly and the shell to define the first material cavity, and the second scraper assembly protrudes downward from the shell and cooperates with the second sealing assembly and the shell to define the second material cavity.

[0009] In some embodiments, each of the first scraper assembly and the second scraper assembly includes two scrapers spaced apart along the first horizontal direction, each of the scrapers extends along the second horizontal direction, each of the first sealing assembly and the second sealing assembly includes two sealing members spaced apart along the second horizontal direction, the two scrapers are enclosed by the corresponding two sealing members, and the second horizontal direction intersects with the first horizontal direction.

[0010] In some embodiments, the blocking member is fixed to the shell, or the blocking member can move up and down relative to the shell.

[0011] In some embodiments, the laser transfer device further includes a bearing structure and a horizontal moving structure, wherein the bearing structure is used to bear the transfer film, and the horizontal moving structure is used to drive the bearing structure and the filling structure to move relative to each other along a first horizontal direction.

[0012] In some embodiments, the first feed port is suitable for introducing a coating solution, and the second feed port is suitable for introducing a printing paste, the coating solution is configured to be coated in the grooves of the transfer film and form a coating after drying, and the coating is configured to decompose or vaporize when irradiated with a laser.

[0013] In some embodiments, the first flow channel cavity also has a first return material port, and the second flow channel cavity also has a second return material port, and the filling structure also includes: a first storage tank, the first storage tank is arranged at the first feed port and is used to feed materials into the first feed port; a second storage tank, the second storage tank is arranged at the second feed port and is used to feed materials into the second feed port, and the first storage tank and the second storage tank are suitable for respectively holding different materials; a first connecting pipe, the first connecting pipe connects the first return material port and the first feed port; a second connecting pipe, the second connecting pipe connects the second return material port and the second feed port.

[0014] In some embodiments, the first storage tank and the second storage tank are respectively provided with pneumatic control valves for controlling the air pressure in the tanks, and the first connecting pipe and the second connecting pipe are respectively provided with material circulation devices.

[0015] In some embodiments, the first return port and the second storage tank are arranged opposite to each other along the first horizontal direction, and the second return port and the second storage tank are arranged opposite to each other along the first horizontal direction, so that the first storage tank and the second storage tank are staggered in the first horizontal direction.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a filling structure according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 Another schematic diagram of the packing structure shown in;

[0020] Figure 3 yes Figure 1 Another schematic diagram of the filling structure shown in ;

[0021] Figure 4 is a schematic diagram of a transfer process of a laser transfer device according to an embodiment of the present application;

[0022] Figure 5 It is a schematic diagram of the transfer process of a laser transfer device according to an embodiment of the present application.

[0023] Reference numerals:

[0024] Filling structure 100, first material cavity 100a, second material cavity 100b, transfer film 101, groove 101a, coating 102, printing paste 103,

[0025] Shell assembly 1, first flow channel cavity 11, first feed port 11a, first return port 11b, second flow channel cavity 12, second feed port 12a, second return port 12b, shell 13,

[0026] The first scraper assembly 2, the first scraper 21,

[0027] The second scraper assembly 3, the second scraper 31,

[0028] The throttle valve 4 , the first storage tank 5 , the second storage tank 6 , the first connecting pipe 7 , the second connecting pipe 8 , the pneumatic control valve 91 , the material circulation device 92 , the first valve body 93 , and the second valve body 94 . DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0030] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can appreciate the applicability of other processes and / or the use of other materials.

[0031] The laser transfer device according to the embodiment of the present application is described below with reference to the accompanying drawings, wherein the laser transfer device comprises a filling structure 100, and the filling structure 100 is used to fill the material onto the transfer film 101, so as to achieve the filling of the material.

[0032] like Figure 1-Figure 3As shown, the filling structure 100 includes a shell component 1, and the shell component 1 defines a first flow channel cavity 11 and a second flow channel cavity 12 separated from each other. The first flow channel cavity 11 and the second flow channel cavity 12 are not connected, and the material in the first flow channel cavity 11 will not flow into the second flow channel cavity 12, and the material in the second flow channel cavity 12 will not flow into the first flow channel cavity 11; the first flow channel cavity 11 has a first feed port 11a, and the second flow channel cavity 12 has a second feed port 12a. The first feed port 11a and the second feed port 12a are suitable for respectively introducing different materials. The first flow channel cavity 11 and the second flow channel cavity 12 are respectively arranged for flowing different materials, and the two different materials will not mix in the first flow channel cavity 11 or the second flow channel cavity 12.

[0033] The filling structure 100 also includes a first scraper assembly 2, which is arranged at the bottom end of the shell assembly 1. The first scraper assembly 2 and the shell assembly 1 define a first material chamber 100a with an open bottom. The first material chamber 100a is connected to the first flow channel chamber 11, and the material flowing into the first flow channel chamber 11 can flow into the first material chamber 100a, and then flow out through the outlet of the first material chamber 100a and fill to the corresponding position, thereby realizing the filling of the corresponding material.

[0034] The filling structure 100 also includes a second scraper assembly 3, which is arranged at the bottom end of the shell assembly 1, and the second scraper assembly 3 and the first scraper assembly 2 are spaced apart along the first horizontal direction. The second scraper assembly 3 and the shell assembly 1 define a second material chamber 100b with an open bottom, and the second material chamber 100b is connected to the second flow channel chamber 12, so that the material flowing into the second flow channel chamber 12 can flow to the second material chamber 100b, and then flow out through the outlet of the second material chamber 100b and fill to the corresponding position, so as to achieve the filling of the corresponding material. Obviously, the second material chamber 100b and the first material chamber 100a are both located at the lower side of the shell assembly 1, and the second material chamber 100b and the first material chamber 100a are spaced apart along the first horizontal direction.

[0035] In the description of the present application, a horizontal direction (the first horizontal direction described above, the second horizontal direction described below) is perpendicular to a vertical direction (ie, an up-down direction).

[0036] It can be seen that in the laser transfer device, the filling structure 100 can realize the filling of different types of materials, especially the filling structure 100 can realize the sequential filling of different types of materials. In the production process, there is no need to replace different structures to realize the filling of different materials, which is conducive to improving the material filling efficiency, thereby facilitating the improvement of production efficiency. In addition, the bottom of the first material chamber 100a is open, and the bottom of the second material chamber 100b is open. When the filling structure 100 is used for printing, the lower end of the filling structure 100 can stop on the upper surface of the transfer film 101, so as to close the first material chamber 100a and the second material chamber 100b through the transfer film 101, so as to realize the stable progress of the printing process, so as to improve the material leakage caused by the poor sealing and affect the printing.

[0037] During the transfer process of the laser transfer device, it is necessary to distribute and fill the grooves 101a on the transfer film 101 with different materials. Taking the filling of each groove 101a on the transfer film 101 with the first material and the second material in turn as an example: the first material is suitable for passing into the first flow channel cavity 11 through the first feed port 11a, and the second material is suitable for passing into the second flow channel cavity 12 through the second feed port 12a. The filling structure 100 can move along the arrangement direction of the multiple grooves 101a (for example, the first horizontal direction). For a single groove 101a, if it is necessary to fill the first material first and then the second material, the first scraper assembly 2 is located upstream of the second scraper assembly 3 in the moving direction to realize the first material filling first. Similarly, if it is necessary to fill the second material first and then the first material, the moving direction of the filling structure 100 can be changed so that the second scraper assembly 3 is located upstream of the first scraper assembly 2 in the moving direction.

[0038] Taking the first horizontal direction as the left and right direction as an example, multiple grooves 101a are arranged in sequence at intervals along the left and right directions, and the first scraper assembly 2 is arranged on the right side of the second scraper assembly 3. When the first material is first filled in the groove 101a and then the second material is filled, the filling structure 100 can move from left to right, so that the first scraper assembly 2 is located upstream of the second scraper assembly 3 in the moving direction, so that the first material and the second material in multiple grooves 101a can be filled in sequence by moving the filling structure 100 once, which is conducive to further improving production efficiency; but not limited to this, in other embodiments, the filling structure 100 can also be constructed to move multiple times to achieve sequential filling of multiple different materials.

[0039] Of course, those skilled in the art will appreciate that the shell component 1 of the filling structure 100 may further define separated third to nth flow channel cavities, where n ≥ 3 and is a positive integer. That is to say, in the embodiment of the present application, m separated flow channel cavities may be defined in the shell component 1, where m ≥ 2 and is a positive integer. For example, m may be 2, 3, 4, 5, and so on.

[0040] According to the laser transfer device of the embodiment of the present application, by setting a plurality of separated flow channel cavities in the filling structure 100, the first flow channel cavity 11 and the second flow channel cavity 12 are suitable for respectively realizing the filling of different materials, so that the filling structure 100 can especially realize the sequential filling of different types of materials. During the production process, there is no need to replace different structures to realize the filling of different materials, which is beneficial to improving the material filling efficiency, thereby facilitating the improvement of transfer efficiency and production efficiency.

[0041] In some embodiments, Figure 2 As shown, the flow area of ​​the first flow channel cavity 11 is smaller than the flow area of ​​the second flow channel cavity 12, then the first flow channel cavity 11 is suitable for realizing the flow of materials with relatively low viscosity, and the second flow channel cavity 12 is suitable for realizing the flow of materials with relatively high viscosity, that is, the first feed port 11a and the second feed port 12a are suitable for respectively introducing materials with different viscosities, and the viscosity of the material corresponding to the first feed port 11a is smaller than the viscosity of the material corresponding to the second feed port 12a; and / or, the first flow channel cavity 11 is indirectly connected to the first material cavity 100a through the throttle valve 4, then the material in the first flow channel cavity 11 flows to the first material cavity 100a after passing through the throttle valve 4, and the throttle valve 4 can control the flow rate of the material flowing from the first flow channel cavity 11 to the first material cavity 100a, so as to realize the first material cavity 1 00a can control the material pressure in the first material chamber 100a to improve, to a certain extent, the problem of easy leakage of the material in the first material chamber 100a due to excessive material pressure, and the second flow channel chamber 12 is directly connected to the second material chamber 100b, so that the material in the second flow channel chamber 12 flows directly to the second material chamber 100b, and the above-mentioned arrangement can make the first flow channel chamber 11 and the second flow channel chamber 12 respectively suitable for passing materials with different viscosities, and the first flow channel chamber 11 is suitable for passing materials with relatively low viscosity, which are prone to leakage when the pressure of the material is high, and the second flow channel chamber 12 is suitable for passing materials with relatively high viscosity, which are not prone to leakage, thereby facilitating targeted arrangements according to the properties of different materials, so as to simplify the structure of the filling structure 100 and reduce costs under the premise of achieving reliable operation of the filling structure 100.

[0042] The flow area of ​​the first flow channel cavity 11 can be understood as the minimum cross-sectional area of ​​the first flow channel cavity 11 or the average cross-sectional area of ​​the first flow channel cavity 11 . The cross-sectional area of ​​the first flow channel cavity 11 is perpendicular to the flow direction of the material in the first flow channel cavity 11 .

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] Of course, in other embodiments of the present application, the second flow channel chamber 12 and the second material chamber 100b can also be connected through another throttle valve, which can control the flow rate of material flowing from the second flow channel chamber 12 to the second material chamber 100b so as to control the material filling amount.

[0045] In some embodiments, Figure 1 and Figure 2 As shown, the shell assembly 1 includes a shell 13, a first plugging assembly and a second plugging assembly, the first flow channel cavity 11 and the second flow channel cavity 12 are both formed in the shell 13, the first plugging assembly and the second plugging assembly are both arranged in the shell 13, and the first plugging assembly and the second plugging assembly both protrude downward from the shell 13, the first scraper assembly 2 protrudes downward from the shell 13, and the first scraper assembly 2 cooperates with the first plugging assembly and the shell 13 to define a first material cavity 100a, the second scraper assembly 3 protrudes downward from the shell 13, and the second scraper assembly 3 cooperates with the second plugging assembly and the shell 13 to define a second material cavity 100b. It can be seen that the first scraper assembly 2, the first plugging assembly and the shell 13 are enclosed, so that the bottom of the first material cavity 100a is open, and the second scraper assembly 3, the second plugging assembly and the shell 13 are enclosed, so that the bottom of the second material cavity 100b is open, and the filling structure 100 has a simple structure and is easy to implement.

[0046] In addition, the first blocking component can be an integral part with the shell 13, or the first blocking component and the shell 13 can be separate parts; similarly, the second blocking component can be an integral part with the shell 13, or the second blocking component and the shell 13 can be separate parts.

[0047] It can be understood that in the embodiment of the present application, the number of flow channel cavities and the number of blocking components can be equal, and each flow channel cavity corresponds to a scraper component and a blocking component respectively. Therefore, when there are three or more flow channel cavities, there are also three or more blocking components.

[0048] Optionally, in Figure 1-Figure 3 In the example, the first feed port 11a and the second feed port 12a are arranged at intervals and are both formed on the upper side of the shell 13, then the first flow channel cavity 11 and the second flow channel cavity 12 both penetrate the upper surface and the lower surface of the shell 13 in the up-down direction, the first material cavity 100a is connected to the lower end of the first flow channel cavity 11, and the second material cavity 100b is connected to the lower end of the second flow channel cavity 12. Of course, the first feed port 11a and the second feed port 12a can also be arranged on other sides of the shell 13, for example, the first feed port 11a and the second feed port 12a are both arranged on the left side of the shell 13, or the first feed port 11a and the second feed port 12a are respectively arranged on the left and right sides of the shell 13, etc.

[0049] Optionally, at least part of the first flow channel cavity 11 extends in the up-down direction, and at least part of the second flow channel cavity 12 extends in the up-down direction, so as to facilitate the smooth flow of materials. Of course, a driving device (such as the material circulation device 92 described later) can also be provided to drive the corresponding material flow.

[0050] In some embodiments, Figure 1 and Figure 2 As shown, each of the first scraper assembly 2 and the second scraper assembly 3 includes two scrapers spaced apart along a first horizontal direction, each scraper extends along a second horizontal direction, each of the first sealing assembly and the second sealing assembly includes two sealing members spaced apart along the second horizontal direction, the two scrapers are enclosed with the corresponding two sealing members, and the second horizontal direction intersects with the first horizontal direction.

[0051] It can be seen that in the above scheme, the first scraper assembly 2 includes two first scrapers 21 spaced apart along the first horizontal direction, each first scraper 21 extends along the second horizontal direction, the second scraper assembly 3 includes two second scrapers 31 spaced apart along the first horizontal direction, each second scraper 31 extends along the second horizontal direction, the first blocking assembly includes two first blocking members spaced apart along the second horizontal direction, and the second blocking assembly includes two second blocking members spaced apart along the second horizontal direction; wherein, the two first scrapers 21 are enclosed with the two first blocking members, at which time the two first scrapers 21 and the two first blocking members can define the side walls of the first material chamber 100a, and the shell 13 can define the top wall of the first material chamber 100a, and the two second scrapers 31 are enclosed with the two second blocking members, at which time the two second scrapers 31 and the two second blocking members can define the side walls of the second material chamber 100b, and the shell 13 can define the top wall of the second material chamber 100b.

[0052] For example, taking the first horizontal direction as the left-right direction and the second horizontal direction as the front-back direction as an example, for the first material chamber 100a, two first scrapers 21 are arranged at intervals along the left-right direction, each first scraper 21 extends along the front-back direction, two first blocking members are arranged at intervals along the front-back direction, and the lower end of each first scraper 21 and each first blocking member extends to the bottom of the housing 13; similarly, for the second material chamber 100b, two second scrapers 31 are arranged at intervals along the left-right direction, each second scraper 31 extends along the front-back direction, two second blocking members are arranged at intervals along the front-back direction, and the lower end of each second scraper 31 and each second blocking member extends to the bottom of the housing 13. Of course, the first horizontal direction and the second horizontal direction can also form any non-zero angle other than a right angle.

[0053] In some embodiments, the blocking member is fixed to the housing 13, or the blocking member can move up and down relative to the housing 13, so as to realize flexible setting of the blocking member under the premise of enclosing the first material chamber 100a and the second material chamber 100b, so as to make the filling structure 100 suitable for different usage scenarios. Exemplarily, the blocking member can be an end plate fixed to the end of the housing 13, or the blocking member can be a piston that can move up and down relative to the housing 13.

[0054] In some embodiments, the laser transfer device further includes a bearing structure and a horizontal moving structure, the bearing structure is used to bear the transfer film 101, the horizontal moving structure is used to drive the bearing structure and the filling structure 100 to move relative to each other along the first horizontal direction, and the filling structure 100 is used to fill the material onto the transfer film 101. For example, the horizontal moving structure is used to drive the filling structure 100 to move relative to the bearing structure, or to drive the bearing structure to move relative to the filling structure 100, and during the relative movement of the bearing structure and the filling structure 100, the transfer film 101 and the filling structure 100 move relative to each other, and at the same time, the transfer film 101 can seal the bottom of the first material chamber 100a and the bottom of the second material chamber 100b.

[0055] It can be seen that the configuration of the bearing structure and the horizontal moving structure can better cooperate with the filling structure 100 to achieve effective filling of the material into the multiple grooves 101 a on the transfer film 101 .

[0056] The inventors found that in laser transfer, the line width and height of the gate line are limited by the groove size of the transfer film. The printing paste is difficult to fall off from the inside of the groove with a large aspect ratio due to the excessive adhesion between the printing paste and the transfer film, making it difficult to form an electrode with a large aspect ratio.

[0057] To this end, in some embodiments of the present application, the laser transfer device is constructed as follows: the first feed port 11a is suitable for passing a coating solution, the second feed port 12a is suitable for passing a printing paste 103, the coating solution is configured to be coated in the groove 101a of the transfer film 101 and to form a coating 102 after drying, and the coating 102 is configured to decompose or vaporize when irradiated with a laser to generate a local space pressure between the wall of the groove 101a and the printing paste 103, and the local space pressure can be greater than 1 standard atmospheric pressure, thereby giving the printing paste 103 a thrust, so that the printing paste 103 can be more easily transferred to a preset position.

[0058] It can be seen that Figure 4 and Figure 5As shown, in the transfer process, the coating solution is first filled in each groove 101a using the filling structure 100, and the printing paste 103 is filled after the coating solution forms the coating 102, so that the coating 102 separates at least part of the groove wall of the groove 101a from the printing paste 103, and then irradiated by the laser device, the coating 102 is thermally decomposed or gasified, and a gas is generated to apply a thrust to the printing paste 103, so that the printing paste 103 is easily separated from the transfer film 101, and the printing paste 103 is released, that is, the desorption ability of the printing paste 103 is enhanced, so as to improve the printing defects such as the slurry residue and the grid line waviness, so as to realize the grid line with a large aspect ratio and improve the transfer quality. Wherein, the coating 102 is thinner than the printing paste 103, and a lower laser power is required to realize the decomposition or gasification of the coating 102. For example, the laser transfer device in the present application can be applied to the contactless printing of the electrode grid line in the process of solar cell processing, so as to improve the processing efficiency of solar cells.

[0059] In other words, in the above scheme, the laser transfer device can adopt a step-by-step filling method, first filling the groove 101a of the transfer film 101 with an appropriate amount (for example, the amount of material can be controlled by the throttle valve 4 mentioned above) of a coating solution matching the printing paste 103, the coating solution is dried to form a coating 102, and then filled with the low-temperature printing paste 103 to be transferred. The coating 102 is between the transfer film 101 and the printing paste 103, which can reduce the viscosity between the low-temperature printing paste 103 and the transfer film 101, so as to further enhance the decomposition or gasification of the coating 102 to promote the shedding of the printing paste 103, so as to realize the transfer of large aspect ratio grid lines.

[0060] Exemplarily, when performing laser transfer, the filling structure 100 is first used to scrape in the groove 101a of the transfer film 101 to fill the coating solution, and after the coating solution dries to form the coating layer 102, the printing paste 103 is filled into the groove 101a, and then the transfer film 101 is turned upside down on the receiving substrate (the open side of the groove 101a carrying the printing paste 103 is arranged toward the receiving substrate), the receiving substrate is fixed on the stage and keeps a certain distance from the transfer film 101, the laser device of the laser transfer device is located on the side of the transfer film 101 away from the receiving substrate, the laser device emits a laser beam and irradiates the groove 101 of the transfer film 101, the coating layer 102 decomposes or vaporizes to promote the printing paste 103 to separate from the transfer film 101, the printing paste 103 detaches from the groove 101a and is transferred to the receiving substrate, completing the electrode printing of the receiving substrate.

[0061] It can be seen that in the above scheme, the laser transfer device facilitates the stable and reliable transfer of the grid lines with a large aspect ratio, which is beneficial to further improve the transfer efficiency.

[0062] Optionally, the multiple grooves 101a of the transfer film 101 can be arranged at intervals along the first horizontal direction, and the cross-sectional shape of each groove 101a is rectangular, trapezoidal, or U-shaped; the horizontal spacing between the first scraper assembly 2 and the second scraper assembly 3 is greater than the horizontal spacing between two adjacent grooves 101a, so that when the filling structure 100 moves along the first horizontal direction and begins to fill the printing paste 103 into the first groove 101a, the solution in the first groove 101a has formed a coating 102, and at this time the filling structure 100 has completed the filling of the solution in p grooves 101a, where p is any positive integer greater than or equal to 2.

[0063] Optionally, the coating 102 includes at least a release component. As a non-limiting embodiment, the laser beam is a near-infrared laser beam (e.g., 1064 nm), and the release component is a near-infrared (NIR) absorbing dye. The NIR absorbing dye is at least partially decomposed under laser irradiation, and forms an air gap layer pressure in a local space when decomposed. It can be seen that the solution includes the above-mentioned release component, and the release component adheres to the groove wall of the groove 101a after the solution dries. The solution also includes a solvent. By adjusting the cost ratio of the release component and the solvent, the internal air gap pressure can be adjusted when the release layer is at least partially decomposed or vaporized, without increasing the laser power to increase the air gap pressure; optionally, the solvent can be an organic solvent, such as acetone, ethylene glycol ether and other solvents.

[0064] In some embodiments, Figure 1-Figure 3 As shown, the first flow channel cavity 11 also has a first return material port 11b, and the first return material port 11b is spaced apart from the first feed port 11a, and the second flow channel cavity 12 also has a second return material port 12b, and the second return material port 12b is spaced apart from the second feed port 12a; the filling structure 100 also includes a first connecting pipe 7 and a second connecting pipe 8, the first connecting pipe 7 connects the first return material port 11b and the first feed port 11a, and the second connecting pipe 8 connects the second return material port 12b and the second feed port 12a. After the material in the first material cavity 100a is filled, the excess material can overflow through the first return material port 11b, and the overflowed material is returned to the first flow channel cavity 11 for circulation through the first connecting pipe 7. Similarly, after the material in the second material cavity 100b is filled, the excess material can overflow through the second return material port 12b, and the overflowed material is returned to the second flow channel cavity 12 for circulation through the second connecting pipe 8, so as to reduce material waste and improve material utilization.

[0065] like Figure 1-Figure 3As shown, the filling structure 100 also includes a first storage tank 5 and a second storage tank 6. The first storage tank 5 is arranged at the first feed port 11a and is used to feed materials into the first feed port 11a. The second storage tank 6 is arranged at the second feed port 12a and is used to feed materials into the second feed port 12a. The first storage tank 5 and the second storage tank 6 are suitable for respectively containing different materials. The material in the first storage tank 5 flows into the first flow channel cavity 11 through the first feed port 11a, and the material in the second storage tank 6 flows into the second flow channel cavity 12 through the second feed port 12a.

[0066] It can be seen that the first feed port 11a is not only connected to the first storage tank 5, but also connected to the end of the first connecting pipe 7 away from the first return port 11b, and the second feed port 12a is not only connected to the second storage tank 6, but also connected to the end of the second connecting pipe 8 away from the second return port 12b. Figure 1 and Figure 2 In the example, a first valve body 93 is provided at the first feed port 11a, and the first valve body 93 has a first valve port, a second valve port and a third valve port, the first valve port is connected to the first feed port 11a, the second valve port is connected to the first storage tank 5, and the third valve port is connected to the first connecting pipe 7; a second valve body 94 is provided at the second feed port 12a, and the second valve body 94 has a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port is connected to the second feed port 12a, the fifth valve port is connected to the second storage tank 6, and the sixth valve port is connected to the second connecting pipe 8.

[0067] Optionally, the first material return port 11b and the second material return port 12b are both disposed on the top side of the housing assembly 1 , but not limited thereto.

[0068] In some embodiments, Figure 1As shown, the first storage tank 5 and the second storage tank 6 are respectively provided with a pneumatic control valve 91 for controlling the air pressure in the tank, and the first connecting pipe 7 and the second connecting pipe 8 are respectively provided with a material circulation device 92. It can be seen that in this scheme, the pneumatic control valve 91 on the first storage tank 5 is used to control the air pressure in the first storage tank 5, and the pneumatic control valve 91 on the second storage tank 6 is used to control the air pressure in the second storage tank 6. The two pneumatic control valves 91 can be used to apply appropriate pressure to the first storage tank 5 and the second storage tank 6 respectively, so that the material in the first storage tank 5 can flow more smoothly to the first material chamber 100a, and the material in the second storage tank 6 can flow more smoothly to the second material chamber 100b, and at the same time, the pressure in the first material chamber 100a and the second material chamber 100b that are not easy to use is too high; the material circulation device 92 on the first connecting pipe 7 can transport the material at the first return port 11b back to the first feed port 11a, so as to increase the power source for the material and accelerate the pressure of excess material back to the first flow channel chamber 11. Similarly, the material circulation device 92 on the second connecting pipe 8 can transport the material at the second return port 12b back to the second feed port 12a, so as to increase the power source for the material and accelerate the pressure of excess material back to the second flow channel chamber 12.

[0069] Thus, the material can be driven by air pressure and material circulation device 92.

[0070] Optionally, the material circulation device 92 may be a material circulation pump or a screw conveying device. The screw conveying device has a certain stirring effect on the material and realizes the transportation of the material at the same time.

[0071] In some embodiments, Figure 1-Figure 3 As shown, the first return material port 11b and the second storage tank 6 are arranged opposite to each other along the first horizontal direction, and the second return material port 12b and the second storage tank 6 are arranged opposite to each other along the first horizontal direction, so that the first storage tank 5 and the second storage tank 6 are staggered in the first horizontal direction, and the first return material port 11b and the second return material port 12b are also staggered in the first horizontal direction, so that the first storage tank 5 and the second storage tank 6 are arranged at intervals in the first horizontal direction and are also arranged at intervals in the horizontal direction perpendicular to the first horizontal direction. As a result, the arrangement of the first storage tank 5 and the second storage tank 6 is relatively dispersed, reducing the installation interference between the first storage tank 5 and the second storage tank 6.

[0072] Exemplarily, the first return port 11b, the second return port 12b, the first feed port 11a, and the second feed port 12a are all formed on the upper side of the shell 13, the first return port 11b is opposite to the first storage tank 5 front to back, the first return port 11b is opposite to the second storage tank 6 left to right, the second return port 12b is opposite to the second storage tank 6 front to back, and the second return port 12b is opposite to the first storage tank 5 left to right, so that the first return port 11b and the second return port 12b are arranged diagonally, and the first storage tank 5 and the second storage tank 6 are also arranged diagonally.

[0073] Other structures and operations of the laser transfer device according to the embodiment of the present application are known to ordinary technicians in the field and will not be described in detail here.

[0074] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not further explain various possible combinations. In addition, the various different embodiments of the present application can also be combined arbitrarily, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application.

[0075] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0076] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A laser transfer device, characterized in that: The invention comprises a filling structure, wherein the filling structure is used to fill the material onto the transfer film, and the filling structure comprises: A shell component, wherein a first flow channel cavity and a second flow channel cavity separated from each other are defined in the shell component, the first flow channel cavity has a first feed port, the second flow channel cavity has a second feed port, and the first feed port and the second feed port are suitable for respectively introducing different materials; A first scraper assembly and a second scraper assembly, the first scraper assembly and the second scraper assembly are arranged at the bottom end of the shell assembly at intervals along a first horizontal direction, the first scraper assembly and the shell assembly define a first material chamber with an open bottom, the first material chamber is communicated with the first flow channel chamber, the second scraper assembly and the shell assembly define a second material chamber with an open bottom, the second material chamber is communicated with the second flow channel chamber.

2. The laser transfer device according to claim 1, characterized in that: The flow area of ​​the first flow channel cavity is smaller than the flow area of ​​the second flow channel cavity; and / or, The first flow channel cavity is indirectly connected to the first material cavity via a throttle valve, and the second flow channel cavity is directly connected to the second material cavity.

3. The laser transfer device according to claim 1, characterized in that: The shell assembly includes a shell, a first sealing assembly and a second sealing assembly. The first flow channel cavity and the second flow channel cavity are both formed in the shell. The first sealing assembly and the second sealing assembly are both arranged in the shell and protrude downward from the shell. The first scraper assembly protrudes downward from the shell and cooperates with the first sealing assembly and the shell to define the first material cavity. The second scraper assembly protrudes downward from the shell and cooperates with the second sealing assembly and the shell to define the second material cavity.

4. The laser transfer device according to claim 3, characterized in that: Each of the first scraper assembly and the second scraper assembly includes two scrapers spaced apart along the first horizontal direction, each of the scrapers extends along the second horizontal direction, each of the first sealing assembly and the second sealing assembly includes two sealing members spaced apart along the second horizontal direction, the two scrapers are enclosed by the corresponding two sealing members, and the second horizontal direction intersects with the first horizontal direction.

5. The laser transfer device according to claim 4, characterized in that: The blocking member is fixed to the shell, or the blocking member can move up and down relative to the shell.

6. The laser transfer device according to claim 1, characterized in that: It also includes a bearing structure and a horizontal moving structure, wherein the bearing structure is used to bear the transfer film, and the horizontal moving structure is used to drive the bearing structure and the filling structure to move relative to each other along a first horizontal direction.

7. The laser transfer device according to claim 1, characterized in that: The first feed port is suitable for introducing a coating solution, and the second feed port is suitable for introducing a printing paste. The coating solution is configured to be coated in the grooves of the transfer film and form a coating after drying. The coating is configured to decompose or vaporize when irradiated with laser.

8. The laser transfer device according to any one of claims 1 to 7, characterized in that: The first flow channel cavity also has a first return port, and the second flow channel cavity also has a second return port. The filling structure further comprises: A first storage tank, the first storage tank is arranged at the first feed inlet and is used to feed materials into the first feed inlet; a second storage tank, the second storage tank being disposed at the second feed port and used for feeding materials into the second feed port, the first storage tank and the second storage tank being suitable for respectively containing different materials; a first connecting pipe, the first connecting pipe connecting the first return port and the first feed port; A second connecting pipe is provided, wherein the second connecting pipe is connected with the second return port and the second feed port.

9. The laser transfer device according to claim 8, characterized in that: The first storage tank and the second storage tank are respectively provided with a pneumatic control valve for controlling the air pressure in the tank, and the first connecting pipe and the second connecting pipe are respectively provided with a material circulation device.

10. The laser transfer device according to claim 8, characterized in that: The first return port and the second storage tank are arranged opposite to each other along the first horizontal direction, and the second return port and the second storage tank are arranged opposite to each other along the first horizontal direction, so that the first storage tank and the second storage tank are staggered in the first horizontal direction.

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