Screen adjusting mechanism and printing equipment

Abstract

The utility model discloses a screen adjusting mechanism and printing equipment, and belongs to the technical field of screen printing. The screen adjusting mechanism comprises a base, two screens horizontally arranged on the base at intervals, a first lifting piece and at least one second lifting piece. The output end of the first lifting part is in transmission connection with the base so as to drive the base to ascend and descend in the first direction, the second lifting part is arranged on the base, and the output end of the second lifting part is in transmission connection with one screen printing plate so as to drive one screen printing plate to ascend and descend in the first direction. According to the screen adjusting mechanism provided by the embodiment of the utility model, the height of each screen can be independently adjusted, so that the height difference between each screen and the corresponding half silicon wafer is the same, and the printing effects of the two half silicon wafers are consistent.

Description

Technical Field

[0001] This utility model belongs to the field of screen printing technology, specifically relating to a screen adjustment mechanism and printing equipment. Background Technology

[0002] In the screen printing process, the screen height needs to be adjusted to regulate the printing effect, thereby adjusting the height difference between the screen and the silicon wafer below. To increase production, when printing half-wafers, two printing mechanisms are set up to print two half-wafers simultaneously, that is, each printing mechanism prints one half-wafer, thus requiring two screens to be set up accordingly.

[0003] Currently, the existing method uses two screens mounted on the same lifting mechanism for synchronous lifting. However, due to processing or installation errors, the thickness or initial installation height of the two screens may differ, resulting in varying height differences between each screen and its corresponding half-wafer. While this synchronous lifting method allows for screen height adjustment, it cannot overcome this height difference issue, leading to inconsistent printing results on the two half-wafers. Another solution is to mount each screen on its own lifting mechanism, controlling their lifting independently, but this method requires a larger overall space. Utility Model Content

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a screen adjustment mechanism and printing equipment, the purpose of which is to independently adjust the height of each screen so that the height difference between each screen and the corresponding half of the silicon wafer is the same, thus ensuring that the printing effect of the two half of the silicon wafer is consistent.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a screen adjustment mechanism, the screen adjustment mechanism comprising a base, two screens horizontally and spaced apart on the base, a first lifting member and at least one second lifting member;

[0006] The output end of the first lifting member is connected to the base to drive the base to move up and down in a first direction. The second lifting member is disposed on the base, and the output end of the second lifting member is connected to one of the screens to drive one of the screens to move up and down in the first direction.

[0007] Optionally, the second lifting component includes a connecting strip, a guide shaft, and a driving unit. The connecting strip is slidably disposed on the base along a second direction, which is located in a horizontal plane. A screen is slidably disposed on the connecting strip relative to the connecting strip. The axial direction of the guide shaft extends along a first direction. One end of the guide shaft is fixedly connected to the base. A screen is slidably inserted into and connected to the other end of the guide shaft. The driving unit is disposed on the base and is used to drive the connecting strip to slide along the second direction.

[0008] Optionally, the screen adjustment mechanism further includes two displacement adjustment modules. Each displacement adjustment module includes a displacement adjustment component and an adjustment plate connected to the displacement adjustment component. Both displacement adjustment components are disposed on the base. Each displacement adjustment component is used to adjust the position of the corresponding adjustment plate on the horizontal plane. The second lifting member is disposed on the adjustment plate, and the screen is connected to the adjustment plate.

[0009] Optionally, a first sliding module extending in a second direction is provided between the connecting strip and the adjusting plate. The slide rail of the first sliding module is fixed on the adjusting plate, and the slider of the first sliding module is fixed on the connecting strip. A second sliding module extending in a second direction is provided between the connecting strip and the screen. The slide rail of the second sliding module is fixed on the connecting strip, and the slider of the second sliding module is fixed on the screen. The second sliding module is inclined.

[0010] Optionally, two of the first sliding modules are spaced apart along the second direction.

[0011] Optionally, the drive unit includes a motor, a lead screw, a lead screw mounting base, and a nut. The motor and the lead screw mounting base are both mounted on the adjustment plate. The output shaft of the motor is connected to the lead screw via a transmission. The lead screw is rotatably inserted into the lead screw mounting base. The nut is sleeved on the lead screw and is fixedly connected to the connecting strip.

[0012] Optionally, the screen adjustment mechanism further includes two screen mounting plates, each screen being mounted on a corresponding screen mounting plate, and the output end of the second lifting member being connected to one of the screen mounting plates in a transmission connection.

[0013] Optionally, there are two first lifting members, spaced apart along a third direction, wherein the third direction is a direction perpendicular to the second direction and lies in the horizontal plane.

[0014] Optionally, the screen adjustment mechanism further includes two screen mounting plates, each screen being located on a corresponding screen mounting plate, the output end of the second lifting member being connected to one of the screen mounting plates, and the other screen mounting plate being located on the base.

[0015] Secondly, this utility model provides a printing device, which includes two doctor blade mechanisms, a turntable, and a screen adjustment mechanism as described in the first aspect;

[0016] Each of the aforementioned scraper mechanisms is located on the base facing away from the screen. Each scraper mechanism is used to squeeze the slurry on the corresponding screen. The turntable has multiple support platform groups evenly spaced along the circumference of the turntable. Each support platform group includes two spaced support platforms for supporting two half-silicon wafers. Each support platform is parallel to the screen and can rotate to below the screen under the drive of the turntable. Each support platform is used to support the paper roll. Each support platform is provided with two spaced paper roll rollers for driving the paper roll to rotate and loading / unloading the half-silicon wafers.

[0017] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0018] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0019] In the stencil adjustment mechanism provided in this embodiment of the invention, two stencils are arranged horizontally and positioned above corresponding half-wafers of silicon wafer. Since the output end of the first lifting member is connected to the base, and the second lifting member is located on the base and its output end is connected to one stencil, the two stencils are arranged horizontally and spaced apart, with the other stencil located on the base. Thus, the first lifting member can drive the base to rise and fall, which in turn drives the second lifting member and the two stencils to rise and fall, thereby simultaneously adjusting the height of both stencils and ultimately adjusting the height between the second stencil and the half-wafer of silicon wafer.

[0020] In addition, the second lifting component can independently drive the first screen to lift, thus adjusting the height between the first screen and the half-wafer. This allows the two screens to independently adjust their heights with the cooperation of the two lifting components (i.e., after the first lifting component lifts the second screen to the appropriate height, the second lifting component drives the first screen to make fine adjustments to overcome the problems of inconsistent thickness and height difference between the two screens during initial installation, ultimately ensuring that the height difference between each screen and the corresponding half-wafer is consistent). This overcomes the problem of inconsistent screen thickness or initial installation height, which leads to different height differences between each screen and the corresponding half-wafer, ensuring consistent printing results for the two half-wafers.

[0021] In other words, the screen adjustment mechanism provided in this embodiment of the invention can independently adjust the height of each screen so that the height difference between each screen and the corresponding half of the silicon wafer is the same, thus ensuring that the printing effect of the two half of the silicon wafer is consistent.

[0022] This utility model provides a screen adjustment mechanism that, compared to independent lifting solutions, supports a symmetrical arrangement, ensuring better parallelism between the screen and the bottom processing table. It eliminates the need for two additional Z-axis lifting assemblies, resulting in lower cost, a compact structure, smaller footprint, and easier maintenance.

[0023] The present invention provides a screen adjustment mechanism that employs a second lifting component including a connecting bar, a guide shaft, and a drive unit. Through a set of horizontally arranged first sliding modules, a set of inclined second sliding modules, and a set of vertically arranged guide shafts, only one drive mechanism is needed to convert the horizontal movement of the connecting bar into the lifting movement of the screen. It occupies very little space, effectively achieves fine adjustment of the screen height, and ensures the parallelism of the screen during the lifting process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a screen adjustment mechanism provided in an embodiment of this utility model;

[0025] Figure 2 This is an exploded view of a screen adjustment mechanism provided in an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the connecting strip provided in an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of a printing device provided in an embodiment of this utility model.

[0028] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0029] 1. Base; 2. First lifting component; 3. Second lifting component; 31. Connecting bar; 311. First sliding module; 312. Second sliding module; 32. Guide shaft; 33. Drive unit; 331. Motor; 332. Lead screw; 333. Lead screw mounting base; 4. Screen; 5. Displacement adjustment module; 51. Adjustment plate; 52. Displacement adjustment assembly; 6. Distance sensor; 7. Screen mounting plate; 8. Scraper mechanism; 9. Turntable; 91. Support platform. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] In the description of this utility model, it should be understood that, unless otherwise stated, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] Example:

[0036] Figure 1 This is a schematic diagram of the structure of a screen adjustment mechanism provided in an embodiment of the present invention. Figure 2 This is an exploded view of a screen adjustment mechanism provided in an embodiment of this utility model. Figure 4This is a structural schematic diagram of a printing device provided in an embodiment of the present utility model, combined with... Figure 1 , Figure 2 and Figure 4 As shown, the screen adjustment mechanism includes a base 1, a first lifting component 2, a second lifting component 3, and two screens 4.

[0037] The output end of the first lifting member 2 is connected to the base 1 to drive the base 1 to rise and fall along the first direction (e.g., the Z-axis direction). The second lifting member 3 is installed on the base 1, and the output end of the second lifting member 3 is connected to a screen 4 to drive the screen 4 to rise and fall along the first direction. The two screens 4 are arranged horizontally and at intervals, and the other screen 4 is installed on the base 1.

[0038] In the stencil adjustment mechanism provided in this embodiment of the present invention, two stencils 4 are arranged horizontally and positioned above corresponding half-wafers of silicon wafer. Since the output end of the first lifting member 2 is connected to the base 1, and the second lifting member 3 is mounted on the base 1 and its output end is connected to one stencil 4, the two stencils 4 are arranged horizontally and at intervals, with the other stencil 4 mounted on the base 1. Thus, the first lifting member 2 can drive the base 1 to rise and fall, and the base 1 in turn drives the second lifting member 3 and the two stencils 4 to rise and fall, thereby simultaneously adjusting the height of the two stencils 4 and ultimately adjusting the height between the second stencil 4 and the half-wafer of silicon wafer. In addition, the second lifting component 3 can independently drive the first screen 4 to rise and fall, thereby adjusting the height between the first screen 4 and the half-wafer. This allows the two screens 4 to independently adjust their heights with the cooperation of the two lifting components (i.e., after the first lifting component 2 raises the second screen 4 to a suitable height, the second lifting component 3 drives the first screen 4 to make fine adjustments to overcome the problems of inconsistent thickness and height difference between the two screens 4 at the initial installation, ultimately ensuring that the height difference between each screen 4 and the corresponding half-wafer is consistent). This overcomes the problem of inconsistent thickness or initial installation height of the screens 4, which leads to different height differences between each screen 4 and the corresponding half-wafer, ensuring consistent printing effects on the two half-wafers.

[0039] In other words, the screen adjustment mechanism provided in this embodiment of the present invention can independently adjust the height of each screen 4 so that the height difference between each screen 4 and the corresponding half of the silicon wafer is the same, thus ensuring that the printing effect of the two half of the silicon wafer is consistent.

[0040] In addition, the screen adjustment mechanism integrates the two screens 4 together through the base 1, making the overall structure more compact and saving the space occupied by the entire mechanism.

[0041] It should be noted that in other embodiments of this utility model, the number of second lifting members 3 can also be two, that is, each second lifting member 3 adjusts the height of the corresponding screen plate 4. In this case, the first lifting member 2 can be regarded as simultaneously performing a large-range height adjustment on the two screen plates 4, while each second lifting member 3 can perform a small-range adjustment or fine adjustment on the corresponding screen plate 4.

[0042] For example, the screen adjustment mechanism also includes two screen mounting plates 7, with each screen 4 mounted on a corresponding screen mounting plate 7. The screen mounting plates 7 are used to connect to the second lifting member 3 or the base 1. For instance, the output end of the second lifting member 3 is connected to one screen mounting plate 7, and the other screen mounting plate 7 is located on the base 1. The screen mounting plates 7 serve to facilitate the installation of the screen 4.

[0043] In addition, both the base 1 and the screen mounting plate 7 are arranged horizontally, and both the base 1 and the screen mounting plate 7 are provided with clearance holes, which are arranged opposite to the screen fabric of the screen 4.

[0044] In this embodiment, there are two first lifting members 2, which are arranged at intervals. The output ends of the two first lifting members 2 are respectively connected to the two corresponding sides of the base 1. The two first lifting members 2 can support the two sides of the base 1 respectively and lift the base 1 simultaneously to achieve symmetrical support, ensuring the stability of the lifting of the base 1, and at the same time ensuring the parallelism between the stencil 4 and the corresponding half of the silicon wafer.

[0045] For example, two first lifting members 2 are spaced apart along a third direction (e.g., the Y direction), wherein the third direction is a direction in the horizontal plane that is perpendicular to the second direction.

[0046] For example, the first lifting component 2 can be a linear module.

[0047] Figure 3 This is a cross-sectional view of the connecting strip provided in an embodiment of this utility model, combined with... Figure 2 and Figure 3As shown, in one implementation of this utility model, the second lifting member 3 includes a connecting bar 31, a guide shaft 32, and a driving unit 33. The connecting bar 31 is slidably connected to the base 1 along a second direction (e.g., the X-axis direction), which is located in a horizontal plane. A screen 4 is obliquely and slidably disposed on the connecting bar 31. The guide shaft 32 extends axially along a first direction. One end of the guide shaft 32 is fixedly connected to the base 1, for example, by a fixed insertion connection. The screen 4 is slidably inserted into the other end of the guide shaft 32. Preferably, the other end of the guide shaft 32 is inserted into the screen mounting plate 7, so that the screen 4 can rise and fall along the guide shaft under its guidance. The driving unit 33 is mounted on the base 1 and is used to drive the connecting bar 31 to slide. The fact that the screen 4 is obliquely and slidably disposed on the connecting bar 31 means that the screen 4 can move simultaneously along the second direction and the vertical direction relative to the connecting bar.

[0048] A first sliding module 311 is provided between the connecting bar 31 and the base 1, and two second sliding modules 312 are provided between the connecting bar 31 and the screen 4. Specifically, the first sliding module 311 is horizontally arranged along the second direction, and its slide rail is fixed to the base 1 and the connecting bar 31. The second sliding module 312 is inclined along the second direction, its slide rail is fixed to the connecting bar 31, and its slider is fixed to the screen 4. Because there is a height difference between the two ends of the second sliding module 312, when the connecting bar 31 moves horizontally left and right, it will drive the screen 4 to move obliquely relative to the connecting bar 31. Under the guidance of the guide shaft 32, the screen 4 is converted into a lifting motion. The inclined arrangement of the second sliding module 312 means that while the second sliding module 312 extends in the second direction, there is a height difference between its two ends.

[0049] In a preferred embodiment, there are two first sliding modules 311, which are spaced apart along the second direction.

[0050] During setup, slots can be made on the connecting strip 31 and / or on the base or screen mounting plate 7 to accommodate the first sliding module 311 and the second sliding module 312.

[0051] In the above embodiment, the drive unit 33 can drive the connecting bar 31 to move horizontally (i.e., in the second direction). Under the vertical guidance of the guide shaft 32, the connecting bar 31 will drive the first screen plate 4 to rise and fall during its movement, ensuring the parallelism of the screen plate 4 during the rising and falling process and preventing displacement in the horizontal direction. In addition, the above configuration can effectively reduce the cost of the second lifting component 3.

[0052] For example, the number of connecting strips 31, guide shafts 32, and drive units 33 can all be two, spaced apart along a third direction perpendicular to the second direction in the horizontal plane, thereby ensuring the stability of the screen 4's lifting and lowering. Preferably, the number of drive units 33 can be one, driving the movement of two connecting strips 31.

[0053] It should be noted that the guide shaft 32 can be implemented using a spline or a linear bearing.

[0054] For example, the screen mounting plate 7 is slidably fitted to the other end of the guide shaft 32, which avoids the need to open a corresponding through hole on the first screen 4. The screen mounting plate 7 is also provided with clearance holes. As one possible implementation, the guide shaft is splined, resulting in a more compact structure. During installation, the spline nut is fixed to the base 1, and the spline shaft is fixed to the screen mounting plate 7, enabling the screen 4 to move up and down relative to the base 1 without horizontal displacement.

[0055] In one implementation of this utility model, the drive unit 33 includes a motor 331, a lead screw 332, a lead screw mounting base 333, and a nut. The motor 331 and the lead screw mounting base 333 are both located on the base 1. The output shaft of the motor 331 is connected to the lead screw 332 for transmission. The lead screw 332 is rotatably inserted into the lead screw mounting base 333. The nut is sleeved on the lead screw 332 and is fixedly connected to the connecting strip 31.

[0056] In the above embodiment, the output shaft of motor 331 rotates, driving lead screw 332 to rotate. The rotation of lead screw 332 is converted into linear motion of nut and connecting bar 31, thereby ultimately driving the left and right movement of connecting bar 31.

[0057] It should be noted that in other embodiments of this utility model, the driving unit 33 can also be a set screw and a spring. The set screw can manually drive the connecting bar 31 to move to the left, while the spring can pull the connecting bar 31 to reset.

[0058] The second lifting component of this utility model, which includes a connecting strip, a guide shaft, and a drive unit, uses a set of horizontally arranged first sliding modules, a set of inclined second sliding modules, and a set of vertically arranged guide shafts. Only one drive mechanism is needed to convert the horizontal movement of the connecting strip into the lifting movement of the screen. It occupies very little space, effectively realizes fine adjustment of the screen height, and ensures the parallelism of the screen during the lifting process.

[0059] In other embodiments of this utility model, the second lifting member 3 may also be a linear module.

[0060] See also Figure 2 and Figure 3To achieve alignment between the stencil and the solar cell, the horizontal position and angle of the stencil also need to be adjusted. The stencil adjustment mechanism of this invention also includes two displacement adjustment modules 5, each comprising an adjustment plate 51 and a displacement adjustment component 52. Both displacement adjustment components 52 are located on the base 1, and the adjustment plate 51 is connected to the base 1 via the displacement adjustment component 52. The displacement adjustment component 52 adjusts the position of the corresponding adjustment plate 51 on the horizontal plane. In one embodiment, a second lifting member 3 is provided on one adjustment plate 51, while the other does not have a second lifting member, and the stencil 4 is provided on the other adjustment plate 51. The adjustment plate 51 provides support for the corresponding stencil 4, and the displacement adjustment component 52 adjusts the horizontal position of the stencil 4 by driving the adjustment plate 51 to adjust its horizontal position. This ensures that each stencil 4 is aligned with its corresponding half-wafer, compensating for errors during the arrangement of the half-wafers.

[0061] For example, each adjustment plate 51 is equipped with three displacement adjustment components 52.

[0062] In addition, the displacement adjustment component 52 is an adjustment component for the UVW positioning platform, thereby enabling horizontal movement along the X and Y axes and rotation along the θ axis, ensuring adjustment accuracy.

[0063] Correspondingly, the second lifting member 3 is disposed on the adjusting plate 51. At this time, the second lifting member 3 is disposed on the base 1 through the adjusting plate 51. More specifically, the connecting strip 31 is slidably connected to the adjusting plate 51 along the second direction, one end of the guide shaft 32 is fixedly connected to the adjusting plate 51, a screen mounting plate 7 is slidably inserted into the other end of the guide shaft 32, and the drive unit 33 is mounted on the adjusting plate 51.

[0064] More specifically, the slide rail of the first sliding module 311 is fixed on the adjustment plate 51, and its slider is fixed on the connecting bar 31. The slide rail of the second sliding module is fixed on the connecting bar, and its slider is fixed to the screen mounting plate 7.

[0065] The motor 331 and the lead screw mounting base 333 of the drive unit 33 are both located on the adjustment plate 51. The output shaft of the motor 331 is connected to the lead screw 332. The lead screw 332 is rotatably inserted into the lead screw mounting base 333. The nut is sleeved on the lead screw 332 and is fixedly connected to the connecting bar 31.

[0066] The second lifting component 3 is set on the adjustment plate 51, which effectively utilizes the space on both sides of the screen to symmetrically arrange the sliding module. It occupies little space, has stable parallelism, and while satisfying the independent height adjustment, it does not occupy the front and rear maintenance space, making it easy to assemble and maintain.

[0067] In this embodiment, the screen adjustment mechanism also includes two distance sensors 6. Each distance sensor 6 is used to detect the height of the corresponding screen 4 in the first direction, so that the height of the corresponding screen 4 can be measured in real time by the distance sensor 6, so that the first lifting member 2 and the second lifting member 3 can compensate for the height of the two screens 4.

[0068] Figure 4 This is a schematic diagram of the structure of a printing device provided in an embodiment of this utility model, as shown below. Figure 4 As shown, the printing equipment includes two squeegee mechanisms 8, a turntable 9, and a screen adjustment mechanism as described above.

[0069] Each squeegee mechanism 8 is located on the base 1, specifically on the base 1 and the other side of the screen 4. Each squeegee mechanism 8 is used to squeeze the paste on the corresponding screen 4 to complete the printing. The turntable 9 is rotatably arranged below the screen 4 and is parallel to the screen 4. The turntable 9 is used to support half of the silicon wafer.

[0070] Specifically, a printing position and a loading / unloading position are formed above the turntable 9 (the loading / unloading position can also be set separately, forming a loading position and an unloading position), and the printing position corresponds to the screen adjustment mechanism. During printing, firstly, two half-wafers are loaded onto the turntable 9 at the loading / unloading position. As the turntable 9 rotates, it moves the two half-wafers to below the two screens 4. The first lifting component 2 and the second lifting component 3 adjust the two screens 4 to the corresponding heights, and the displacement adjustment component 52 adjusts the horizontal position and angle of the screens. Then, the squeegee mechanism 8 applies the paste to the corresponding screen 4 by squeezing it with the corresponding squeegee, thereby completing the printing of the corresponding half-wafer. Finally, the turntable 9 continues to rotate and moves the printed half-wafer to the loading / unloading position for unloading. After unloading, loading is performed again, and the above steps are repeated to complete the printing of the other half-wafers in sequence.

[0071] Furthermore, the turntable 9 has multiple carrier platform groups evenly spaced along the circumference of the turntable 9. Each carrier platform group includes two spaced carrier platforms 91. Each carrier platform 91 is parallel to the screen 4 and located below the screen 4. Each carrier platform 91 is used to support the paper roll. Each carrier platform 91 is provided with two spaced paper roll rollers (not shown) to drive the paper roll to rotate, thereby driving the upper half of the silicon wafer to be loaded and unloaded.

[0072] For example, the carrier group can have 4 or 6 units, etc.

[0073] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screen printing adjustment mechanism, characterized in that, The screen adjustment mechanism includes a base, two screens horizontally and spaced apart on the base, a first lifting component, and at least one second lifting component; The output end of the first lifting member is connected to the base to drive the base to move up and down in a first direction. The second lifting member is disposed on the base, and the output end of the second lifting member is connected to one of the screens to drive one of the screens to move up and down in the first direction.

2. The screen printing adjustment mechanism according to claim 1, characterized in that, The second lifting component includes a connecting strip, a guide shaft, and a driving unit. The connecting strip is slidably disposed on the base along a second direction, which is located in a horizontal plane. A screen is obliquely and slidably disposed on the connecting strip relative to the connecting strip. The axial direction of the guide shaft extends along a first direction. One end of the guide shaft is fixedly connected to the base. The other end of the screen is slidably inserted into the guide shaft. The driving unit is disposed on the base and is used to drive the connecting strip to slide along the second direction.

3. The screen printing adjustment mechanism according to claim 2, characterized in that, The screen adjustment mechanism further includes two displacement adjustment modules. Each displacement adjustment module includes a displacement adjustment component and an adjustment plate connected to the displacement adjustment component. Both displacement adjustment components are disposed on the base. Each displacement adjustment component is used to adjust the position of the corresponding adjustment plate on the horizontal plane. The second lifting member is disposed on the adjustment plate, and the screen is connected to the adjustment plate.

4. The screen printing adjustment mechanism according to claim 3, characterized in that, A first sliding module extending in a second direction is provided between the connecting strip and the adjusting plate. The slide rail of the first sliding module is fixed on the adjusting plate, and the slider of the first sliding module is fixed on the connecting strip. A second sliding module extending in a second direction is provided between the connecting strip and the screen. The slide rail of the second sliding module is fixed on the connecting strip, and the slider of the second sliding module is fixed on the screen. The second sliding module is inclined.

5. The screen printing adjustment mechanism according to claim 4, characterized in that, Two of the first sliding modules are spaced apart along the second direction.

6. The screen printing adjustment mechanism according to claim 4, characterized in that, The drive unit includes a motor, a lead screw, a lead screw mounting base, and a nut. The motor and the lead screw mounting base are both mounted on the adjustment plate. The output shaft of the motor is connected to the lead screw via a transmission. The lead screw is rotatably inserted into the lead screw mounting base. The nut is sleeved on the lead screw and is fixedly connected to the connecting strip.

7. The screen printing adjustment mechanism according to claim 1, characterized in that, The screen adjustment mechanism also includes two screen mounting plates, each screen being mounted on a corresponding screen mounting plate, and the output end of the second lifting component being connected to one of the screen mounting plates in a transmission connection.

8. The screen printing adjustment mechanism according to claim 2, characterized in that, The first lifting component consists of two parts, which are spaced apart along a third direction, where the third direction is a direction perpendicular to the second direction and lies in the horizontal plane.

9. The screen printing adjustment mechanism according to claim 1, characterized in that, The screen adjustment mechanism also includes two screen mounting plates, with each screen located on a corresponding screen mounting plate. The output end of the second lifting component is connected to one of the screen mounting plates, and the other screen mounting plate is located on the base.

10. A printing apparatus, characterized in that, The printing equipment includes two doctor blade mechanisms, a turntable, and a screen adjustment mechanism as described in any one of claims 1-9; Each of the aforementioned scraper mechanisms is located on the base facing away from the screen. Each scraper mechanism is used to squeeze the slurry on the corresponding screen. The turntable has multiple support platform groups evenly spaced along the circumference of the turntable. Each support platform group includes two spaced support platforms for supporting two half-silicon wafers. Each support platform is parallel to the screen and can rotate to below the screen under the drive of the turntable. Each support platform is used to support the paper roll. Each support platform is provided with two spaced paper roll rollers for driving the paper roll to rotate and loading / unloading the half-silicon wafers.

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