Silicon wafer printing machine suitable for double-half-wafer printing

Abstract

The utility model discloses a silicon wafer printing machine suitable for double-half-wafer printing, which comprises a working platform, a turntable assembly, a front section conveying rail, a left side calibration module and a right side calibration module, and a calibration vision camera is arranged above the tail end of the front section conveying rail; the left linear module is connected with a left motor module, and the left motor module is connected with a left adsorption module; the right linear module is connected with a right motor module, the right motor module is connected with two calibration cylinders, the calibration cylinders are connected with calibration bearings, and the two calibration bearings are jointly connected with a right adsorption module. According to the silicon wafer printing machine suitable for double-half-wafer printing, visual positioning is conducted at the tail end of the conveying rail, the positions and angles of the double half wafers are judged, the left half wafer serves as the reference, the right half wafer is controlled to adjust the angle, the alignment time of the double half wafers is greatly shortened, double-head double-half-wafer printing is improved into single-head double-half-wafer printing, a front-back printing mode is adopted, and the printing efficiency is greatly improved. The size of the index plate is reduced, and the efficiency of printing on the rotary disc assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon wafer production, in particular to a silicon wafer printer suitable for double-half wafer printing. Background Art

[0002] Photovoltaic solar silicon wafers (hereinafter referred to as wafers) are the core and most valuable component of solar power generation systems. The wafers convert solar energy into electricity, which is stored in batteries or used directly as loads. In the existing double-wafer printing process, the wafer halves are first transferred from two front conveyor rails to a turntable assembly. Cameras are then used to position the wafers and the printing module is adjusted to ensure the screen is accurately aligned with the wafer halves on the turntable assembly. However, the slow adjustment speed of the printing module results in a slow alignment process, which affects printing efficiency. Utility Model Content

[0003] One purpose of the present utility model is to provide a silicon wafer printer suitable for double-half wafer printing. Before the double-half wafers are transferred to the turntable assembly, two calibration modules are used for alignment. The left calibration module serves as a reference, and the right calibration module performs angle correction, thereby saving subsequent alignment time and improving printing efficiency.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A silicon wafer printer suitable for double-half wafer printing, comprising a work platform, a turntable assembly, a front-end conveyor rail, a left calibration module, and a right calibration module. The turntable assembly is located in the middle of the work platform, the front-end conveyor rail is located on one side of the work platform, the left calibration module and the right calibration module are respectively located on either side of the front-end conveyor rail, and a calibration vision camera is installed above the end of the front-end conveyor rail.

[0006] The left calibration module includes a left linear module, a driving end of the left linear module is connected to a left motor module, and the driving end of the left motor module is connected to a left adsorption module along a vertical direction;

[0007] The right calibration module includes a right linear module, the driving end of the right linear module is connected to the right motor module, the driving end of the right motor module is connected to two calibration cylinders, the two calibration cylinders are placed in parallel, the driving end of the calibration cylinder is downwardly connected to a calibration bearing, and the two calibration bearings are commonly connected to the right adsorption module.

[0008] As an optimal technical solution, a snapping motor is installed on the front conveyor rail, the driving end key of the snapping motor is connected to the snapping synchronous wheel, the snapping synchronous wheel is connected to the snapping synchronous belt, and a snapping rod is fixed on the snapping synchronous belt.

[0009] As a preferred technical solution, it includes a rear-section conveyor rail, on which a fragment lifting cylinder is installed, and the driving end of the fragment lifting cylinder is upwardly connected to a fragment lifting plate, and both sides of the fragment lifting plate are located on the outside of the rear-section conveyor rail, and a detection bracket is installed at the rear end of the rear-section conveyor rail, and a sensor is installed on the top of the detection bracket. The sensor is located above the rear-section conveyor rail, and the sensor is used to sense whether there is a fragment blockage in the rear reflow furnace.

[0010] As a preferred technical solution, it includes a printing module, wherein a group of X-axis modules and two groups of Y-axis modules are installed at the lower end of the printing module, and the group of X-axis modules and the two groups of Y-axis modules are connected together on a screen mounting frame.

[0011] As a preferred technical solution, lifting modules are installed on both sides of the rear end of the working platform, and the lifting modules include side brackets. A lifting servo motor is installed on the upper end of the side bracket, and a driving end of the lifting servo motor is connected to a lifting ball screw. Both sides of the printing module are connected to a lifting plate, and a lifting ball nut is fixed to the outer side of the lifting plate. The lifting ball screw is threadedly connected to the lifting ball nut, and the lifting plate slides on the side bracket in a vertical direction. A lifting guide rail is installed on the side bracket, and a lifting slider is fixed to the outer side of the lifting plate, and the lifting slider slides on the lifting guide rail.

[0012] As a preferred technical solution, a scraper linear module is installed on the printing module, and the scraper linear module includes a profile base, an adapter plate and an electrical installation plate. Electrical components and drag chains are installed on the electrical installation plate. The lower end of the adapter plate slides along the front and rear directions between the two sides and the profile base through guide rails and sliders. The adapter plate is fixed on one side of the electrical installation plate, and the adapter plate is locked with a printing kit.

[0013] As a preferred technical solution, the driving end of the scraper linear module is connected to the scraper forward and backward moving plate, the printing kit is fixed on one side of the scraper forward and backward moving plate, the lower end of the printing kit is connected to the slurry scraper, and the upper end of the printing kit is equipped with a scraper motor. The scraper motor controls the slurry scraper to move in the vertical direction through a ball screw and a ball nut. The lower end of the printing kit is also connected to an ink return knife, and the upper end of the printing kit is also equipped with an ink return motor. The ink return motor also controls the ink return knife seat with the ink return knife to move in the vertical direction through a ball screw and a ball nut, and the two ends of the ink return knife are respectively locked on the two ends of the ink return knife seat.

[0014] As a preferred technical solution, the X-axis module and the Y-axis module both have a module mechanism, which includes a module base plate, a module motor, an adjustment screw and an adjustment slide. The driving end of the module motor is transmission-connected to the adjustment screw, and the adjustment screw is threadedly connected to the adjustment nut under the adjustment slide. The adjustment slide slides along the length direction of the adjustment screw, and the adjustment slide has a connecting bearing, which slides on the adjustment slide. The moving direction of the connecting bearing is perpendicular to the moving direction of the adjustment slide, and the edge of the wire mesh mounting frame is locked in the connecting bearing.

[0015] As a preferred technical solution, the turntable assembly includes a circular turntable, an integrated electrical slip ring and a turntable motor. Four groups of workstations are installed around the circular turntable, and each group of workstations is provided with two half-sheet printing positions. The driving end of the turntable motor is vertically connected to the integrated electrical slip ring, and the middle part of the circular turntable is connected to the integrated electrical slip ring. The lower end of the circular turntable is rotatably connected to a paper roll transport component, and the paper roll transport component includes a unwinding shaft and a rewinding shaft. A paper roll is transmission-connected between the unwinding shaft and the rewinding shaft. The paper roll passes through the half-sheet printing position and carries the silicon wafer, thereby transporting the silicon wafer. The paper roll is air permeable. The paper roll transport component transports the silicon wafer to the workstation of the circular turntable, as well as to the printing position where the double-half-sheet precision screen printing machine outputs the silicon wafer.

[0016] As a preferred technical solution, the positions between the four groups of workstations of the circular turntable form a fan-shaped area, which stores the discharger elements and control components together with the middle position of the circular turntable, and then covered with a protective cover. Each half-sheet printing position has a breathable negative pressure plate, and the breathable negative pressure plate is provided with a number of air holes. The air holes pass through the roll of paper to adsorb and fix the silicon wafer on the half-sheet printing position.

[0017] The beneficial effects of the utility model are as follows: providing a silicon wafer printer suitable for double-half-wafer printing, the silicon wafer printer suitable for double-half-wafer printing performs visual positioning at the end of the conveyor rail to judge the position and angle of the double half-wafers, and controls the angle adjustment of the right half-wafer with the left half-wafer as a reference, and after being aligned with the left half-wafer, moves the right half-wafer together onto the turntable assembly for printing, thereby greatly shortening the alignment time of the double half-wafers, saving the action of screen correction, and accelerating the efficiency of printing on the turntable assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 A top view of a silicon wafer printer suitable for double-half wafer printing according to an embodiment;

[0020] Figure 2 This is a first combined structural diagram of the front conveyor rail, the left calibration module, and the right calibration module according to the embodiment;

[0021] Figure 3 A second structural diagram of the front conveyor rail, the left calibration module, and the right calibration module according to the embodiment;

[0022] Figure 4 Schematic diagram of the structure of the right calibration module according to the embodiment;

[0023] Figure 5 Schematic diagram of the structure of the left calibration module according to the embodiment;

[0024] Figure 6 is a front perspective view of the turntable assembly according to the embodiment;

[0025] Figure 7 It is a front view of the turntable assembly according to the embodiment;

[0026] Figure 8 A diagram showing a middle portion of a turntable assembly according to an embodiment of the present invention;

[0027] Figure 9 A front perspective view of the printing module according to the embodiment;

[0028] Figure 10 A bottom view of the printing module according to an embodiment;

[0029] Figure 11 This is an exploded view of the X-axis module / Y-axis module described in the embodiment;

[0030] Figure 12 This is a three-dimensional structural diagram of the lifting module described in the embodiment;

[0031] Figure 13This is a schematic structural diagram of the printing kit according to an embodiment;

[0032] Figure 14 An exploded view of the printing kit according to an embodiment;

[0033] Figure 15 Schematic diagram of the structure of the rear conveyor rail described in the embodiment.

[0034] Figures 1 to 15 middle:

[0035] 1. Working platform; 2. Turntable assembly; 3. Front conveyor rail; 4. Calibration module on the left; 5. Calibration module on the right; 6. Calibration vision camera; 7. Clamping motor; 8. Clamping synchronous wheel; 9. Clamping rod; 10. Linear module on the left; 11. Motor module on the left; 12. Adsorption module on the left; 13. Linear module on the right; 14. Motor module on the right; 15. Calibration cylinder; 16. Calibration bearing; 17. Adsorption module on the right; 18. Circular turntable; 19. Electrical integrated slip ring; 20. Turntable motor; 21. Half-sheet printing position; 22. Unwinding shaft; 23. Rewinding shaft; 24. Paper roll; 25. Protective cover; 26. Breathable negative pressure plate; 27. Printing module; 28. X-axis module; 29. ​​Y Shaft module; 30. Screen mounting frame; 31. Module base plate; 32. Module motor; 33. Adjustment screw; 34. Adjustment slide; 35. Connecting bearing; 36. Lifting module; 37. Side bracket; 38. Lifting servo motor; 39. Lifting ball screw; 40. Lifting plate; 41. Lifting guide rail; 42. Scraper linear module; 43. Profile base; 44. Drag chain; 45. Printing kit; 46. Scraper forward and backward moving plate; 47. Slurry scraper; 48. Scraper motor; 49. Ink return knife; 50. Ink return motor; 51. Ink return knife holder; 52. Slurry knife holder; 53. Rear conveyor rail; 54. Fragment lifting cylinder; 55. Fragment lifting plate; 56. Detection bracket; 57. Sensor. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0037] like Figures 1 to 15 As shown, in this embodiment, a silicon wafer printer suitable for double half-wafer printing includes a working platform 1, a turntable assembly 2, a front-end conveyor rail 3, a left calibration module 4 and a right calibration module 5. The turntable assembly 2 is located in the middle of the working platform 1, the front-end conveyor rail 3 is located on one side of the working platform 1, the left calibration module 4 and the right calibration module 5 are respectively located on both sides of the front-end conveyor rail 3, and a calibration vision camera 6 is installed above the end of the front-end conveyor rail 3.

[0038] The front conveyor track 3 conveys the two half sheets backward from the two sections of the track respectively. When the two half sheets move to the end of the track, the calibration visual camera 6 on the camera frame takes pictures of the two half sheets on the two sections of the track. After determining the position of the two half sheets, the left calibration module 4 directly absorbs the half sheet on the left, and the right calibration module 5 adjusts the angle of the absorbed half sheet based on the left half sheet, and then puts the left and right sides into the turntable assembly 2 synchronously. There is no need to adjust the printing scraper part, which effectively improves the printing efficiency and quality.

[0039] A snapping motor 7 is installed on the front conveyor rail 3, and the driving end key of the snapping motor 7 is connected to the snapping synchronous wheel 8, and the snapping synchronous wheel 8 is transmission-connected to the snapping synchronous belt, and a snapping rod 9 is fixed on the snapping synchronous belt.

[0040] When the silicon wafers transported from the front are uneven, the snapping motor 7 controls the snapping synchronous wheel 8 to rotate, and the snapping synchronous belt transmission is linked to make the snapping rods 9 on both sides of the front conveying rail 3 move closer to the middle, and the silicon wafers are flattened in the middle position of the front conveying rail 3.

[0041] Then, the left calibration module 4 includes a left linear module 10, the driving end of the left linear module 10 is connected to the left motor module 11, and the driving end of the left motor module 11 is connected to the left adsorption module 12 along the vertical direction; the right calibration module 5 includes a right linear module 13, the driving end of the right linear module 13 is connected to the right motor module 14, and the driving end of the right motor module 14 is connected to two calibration cylinders 15, the two calibration cylinders 15 are placed in parallel, and the driving end of the calibration cylinder 15 is downwardly connected to the calibration bearing 16, and the two calibration bearings 16 are jointly connected to the right adsorption module 17.

[0042] The left motor module 11 on the left linear module 10 controls the left adsorption module 12 to descend, adsorbs the left half-piece on the left track, and moves it to the loading station of the turntable assembly 2 under the drive of the left linear module 10. The right motor module 14 on the right linear module 13 controls the right adsorption module 17 to descend, adsorbs the right half-piece on the right track, and according to the positions of the left and right half-pieces captured by the calibration vision camera 6, with the left half-piece as the reference, the two calibration cylinders 15 extend and retract the driving end to rotate the angle of the right adsorption module 17, and the calibration bearing 16 assists in steering so that the right half-piece is aligned with the position of the left half-piece. The right linear module 13 also synchronizes the left linear module 10 to move the right half-piece to the loading station of the turntable assembly 2.

[0043] The turntable assembly 2 includes a circular turntable 18, an electrical integrated slip ring 19 and a turntable motor 20. Four groups of workstations are installed around the circular turntable 18, and each group of workstations is provided with two half-sheet printing positions 21. The driving end of the turntable motor 20 is vertically connected to the electrical integrated slip ring 19, and the middle part of the circular turntable 18 is connected to the electrical integrated slip ring 19. The lower end of the circular turntable 18 is rotatably connected to a paper roll 24 transport component. The paper roll 24 transport component includes a unwinding shaft 22 and a rewinding shaft 23. The unwinding shaft 22 and the rewinding shaft 23 are connected by a paper roll 24. The paper roll 24 passes through the half-sheet printing position 21 and carries the silicon wafer, playing the role of transporting the silicon wafer. The paper roll 24 is air permeable. The paper roll 24 transport component transports the silicon wafer to the workstation of the circular turntable 18, as well as to the printing position where the double half-sheet precision screen printing machine outputs the silicon wafer.

[0044] On the circular turntable 18, the positions between the four groups of workstations form a fan-shaped area, which stores the discharger elements and control components together with the middle position of the circular turntable 18, and then covered with a protective cover 25. Each of the half-sheet printing positions 21 has a breathable negative pressure plate 26, and the breathable negative pressure plate 26 is provided with a plurality of breathable holes. The breathable holes pass through the roll paper 24 to adsorb and fix the silicon wafer on the half-sheet printing position 21.

[0045] The silicon wafer on the front conveyor rail 3 is placed on the half-sheet printing position 21. The turntable motor 20 provides power to control the electrical integrated slip ring 19 to link the circular turntable 18 to rotate horizontally, driving the silicon wafer to move to the bottom of the screen mounting frame 30. At the same time, the printed silicon wafer is moved from the bottom of the screen mounting frame 30 to the front of the rear conveyor rail 53. The reel 23 and the unreel 22 rotate synchronously to wipe the half-sheet printing position 21 with the clean roll of paper 24.

[0046] The silicon wafer printer suitable for double-half wafer printing includes a printing module 27. A group of X-axis modules 28 and two groups of Y-axis modules 29 are installed at the lower end of the printing module 27. The group of X-axis modules 28 and the two groups of Y-axis modules 29 are connected together to a screen mounting frame 30. The X-axis module 28 and the Y-axis module 29 both have a module mechanism, which includes a module base plate 31, a module motor 32, an adjustment screw 33 and an adjustment slide 34. The driving end of the module motor 32 is transmission-connected to the adjustment screw 33. The adjustment screw 33 is threadedly connected to the adjustment nut under the adjustment slide 34. The adjustment slide 34 slides along the length direction of the adjustment screw 33. The adjustment slide 34 has a connecting bearing 35. The connecting bearing 35 slides on the adjustment slide 34. The moving direction of the connecting bearing 35 is perpendicular to the moving direction of the adjustment slide 34. The edge of the screen mounting frame 30 is locked in the connecting bearing 35.

[0047] The printing module 27 controls a set of X-axis modules 28 and two sets of Y-axis modules 29 through visual positioning according to the position and angle of the left half sheet, so that the screen mounting frame 30 with the screen is aligned with the position of the two half sheets. After it is lowered onto the turntable assembly 2, the printing operation can be carried out.

[0048] A lifting module 36 is installed on both sides of the rear end of the working platform 1. The lifting module 36 includes a side bracket 37. A lifting servo motor 38 is installed on the upper end of the side bracket 37. The driving end of the lifting servo motor 38 is connected to a lifting ball screw 39. A lifting plate 40 is connected to both sides of the printing module 27. A lifting ball nut is fixed to the outer side of the lifting plate 40. The lifting ball screw 39 is threadedly connected to the lifting ball nut. The lifting plate 40 slides on the side bracket 37 in the vertical direction. A lifting guide rail 41 is installed on the side bracket 37. A lifting slider is fixed to the outer side of the lifting plate 40. The lifting slider slides on the lifting guide rail 41.

[0049] When controlling the lifting of the printing module 27, the lifting servo motor 38 controls the rotation of the lifting ball screw 39, and the lifting plate 40 with the lifting ball nut drives the printing module 27 to move along the direction of the lifting guide rail 41, thereby improving the accuracy and moving speed.

[0050] A scraper linear module 42 is installed on the printing module 27. The scraper linear module 42 includes a profile base 43, an adapter plate and an electrical installation plate 44. Electrical components and a drag chain 45 are installed on the electrical installation plate 44. The lower end of the adapter plate slides along the front and rear directions between the two sides and the profile base 43 through guide rails and sliders. The adapter plate is fixed on one side of the electrical installation plate 44, and the adapter plate is locked with a printing kit 46.

[0051] The driving end of the scraper linear module 42 is connected to the scraper forward and backward moving plate 47, the printing kit 46 is fixed on one side of the scraper forward and backward moving plate 47, the lower end of the printing kit 46 is connected to the slurry scraper 48, and the upper end of the printing kit 46 is equipped with a scraper motor 49. The scraper motor 49 controls the slurry knife seat with the slurry scraper 48 to move in the vertical direction through a ball screw and a ball nut. The lower end of the printing kit 46 is also connected to the ink return knife 50, and the upper end of the printing kit 46 is also equipped with an ink return motor 51. The ink return motor 51 also controls the ink return knife seat 52 with the ink return knife 50 to move in the vertical direction through a ball screw and a ball nut. The two ends of the ink return knife 50 are respectively locked on the two ends of the ink return knife seat 52.

[0052] When scraping the slurry, the scraper motor 49 controls the slurry scraper 48 to move down to the screen, and the scraper linear module 42 moves the printing kit 46 through the forward and backward movement of the scraper forward and backward moving plate 47, so that the slurry scraper 48 scrapes the slurry from the screen to the silicon wafer when moving back and forth.

[0053] The silicon wafer printer suitable for double-half wafer printing includes a rear-section conveyor rail 53, on which a fragment lifting cylinder 54 is installed. The driving end of the fragment lifting cylinder 54 is upwardly connected to a fragment lifting plate 55, and both sides of the fragment lifting plate 55 are located on the outside of the rear-section conveyor rail 53. A detection bracket 56 is installed at the rear end of the rear-section conveyor rail 53, and a sensor 57 is installed on the top of the detection bracket 56. The sensor 57 is located above the rear-section conveyor rail 53 and is used to sense whether there is a fragment blockage in the rear reflow furnace.

[0054] When the silicon wafer needs to be transferred or inspected on the rear conveyor rail 53, the wafer lifting plate 55 can be lifted by the wafer lifting cylinder 54 to operate the silicon wafer independently. The sensor 57 at the end of the rear conveyor rail 53 senses the presence of the silicon wafer in preparation for subsequent docking.

[0055] It should be stated that the above-mentioned specific implementation methods are only preferred embodiments of the present invention and the technical principles used. Within the technical scope disclosed by the present invention, any changes or replacements that can be easily thought of by technicians familiar with this technical field should be included in the scope of protection of the present invention.

Claims

1. A silicon wafer printer suitable for double half wafer printing, characterized in that: It includes a working platform, a turntable assembly, a front conveyor rail, a left calibration module and a right calibration module. The turntable assembly is located in the middle of the working platform, the front conveyor rail is located on one side of the working platform, the left calibration module and the right calibration module are respectively located on both sides of the front conveyor rail, and a calibration vision camera is installed above the end of the front conveyor rail. The left calibration module includes a left linear module, a driving end of the left linear module is connected to a left motor module, and the driving end of the left motor module is connected to a left adsorption module along a vertical direction; The right calibration module includes a right linear module, the driving end of the right linear module is connected to the right motor module, the driving end of the right motor module is connected to two calibration cylinders, the two calibration cylinders are placed in parallel, the driving end of the calibration cylinder is downwardly connected to a calibration bearing, and the two calibration bearings are commonly connected to the right adsorption module.

2. A silicon wafer printer suitable for double half wafer printing according to claim 1, characterized in that: A snapping motor is installed on the front conveying rail, a driving end key of the snapping motor is connected to a snapping synchronous wheel, the snapping synchronous wheel is transmission-connected to a snapping synchronous belt, and a snapping rod is fixed on the snapping synchronous belt.

3. The silicon wafer printer suitable for double half wafer printing according to claim 1, characterized in that: It includes a rear conveyor rail, on which a fragment lifting cylinder is installed, the driving end of the fragment lifting cylinder is upwardly connected to a fragment lifting plate, both sides of the fragment lifting plate are located on the outside of the rear conveyor rail, and a detection bracket is installed at the rear end of the rear conveyor rail. A sensor is installed on the top of the detection bracket, and the sensor is located above the rear conveyor rail. The sensor is used to sense whether there is a fragment blockage in the rear reflow furnace.

4. The silicon wafer printer suitable for double half wafer printing according to claim 1, characterized in that: It comprises a printing module, wherein a group of X-axis modules and two groups of Y-axis modules are installed at the lower end of the printing module, and the group of X-axis modules and the two groups of Y-axis modules are connected to a screen installation frame.

5. The silicon wafer printer suitable for double half wafer printing according to claim 4, characterized in that: Lifting modules are installed on both sides of the rear end of the working platform, and the lifting modules include side brackets. A lifting servo motor is installed on the upper end of the side bracket, and a driving end of the lifting servo motor is connected to a lifting ball screw. Lifting plates are connected on both sides of the printing module, and a lifting ball nut is fixed on the outer side of the lifting plate. The lifting ball screw is threadedly connected to the lifting ball nut, and the lifting plate slides on the side bracket in a vertical direction. A lifting guide rail is installed on the side bracket, and a lifting slider is fixed on the outer side of the lifting plate, and the lifting slider slides on the lifting guide rail.

6. The silicon wafer printer suitable for double-half wafer printing according to claim 5, characterized in that: A scraper linear module is installed on the printing module, and the scraper linear module includes a profile base, an adapter plate and an electrical installation plate. Electrical components and a drag chain are installed on the electrical installation plate. The lower end of the adapter plate slides along the front and rear directions between the two sides and the profile base through guide rails and sliders. The adapter plate is fixed on one side of the electrical installation plate, and the adapter plate is locked with a printing kit.

7. The silicon wafer printer suitable for double half wafer printing according to claim 6, characterized in that: The driving end of the scraper linear module is connected to the scraper forward and backward moving plate, the printing kit is fixed on one side of the scraper forward and backward moving plate, the lower end of the printing kit is connected to the slurry scraper, the upper end of the printing kit is equipped with a scraper motor, the scraper motor controls the slurry scraper to move in the vertical direction through a ball screw and a ball nut, the lower end of the printing kit is also connected to an ink return knife, the upper end of the printing kit is also equipped with an ink return motor, the ink return motor also controls the ink return knife seat with the ink return knife to move in the vertical direction through a ball screw and a ball nut, and the two ends of the ink return knife are respectively locked on the two ends of the ink return knife seat.

8. The silicon wafer printer suitable for double half wafer printing according to claim 4, characterized in that: The X-axis module and the Y-axis module both have a module mechanism, which includes a module base plate, a module motor, an adjustment screw and an adjustment slide. The driving end of the module motor is transmission-connected to the adjustment screw, and the adjustment screw is threadedly connected to the adjustment nut under the adjustment slide. The adjustment slide slides along the length direction of the adjustment screw, and the adjustment slide has a connecting bearing, which slides on the adjustment slide. The moving direction of the connecting bearing is perpendicular to the moving direction of the adjustment slide, and the edge of the wire mesh mounting frame is locked in the connecting bearing.

9. The silicon wafer printer suitable for double half wafer printing according to claim 1, characterized in that: The turntable assembly includes a circular turntable, an electrical integrated slip ring and a turntable motor. Four groups of workstations are installed around the circular turntable, and each group of workstations is provided with two half-sheet printing positions. The driving end of the turntable motor is vertically connected to the electrical integrated slip ring, and the middle part of the circular turntable is connected to the electrical integrated slip ring. The lower end of the circular turntable is rotatably connected to a paper roll transport component, and the paper roll transport component includes a unwinding shaft and a rewinding shaft. A paper roll is transmission-connected between the unwinding shaft and the rewinding shaft. The paper roll passes through the half-sheet printing position and carries the silicon wafer, thereby transporting the silicon wafer. The paper roll is air permeable. The paper roll transport component transports the silicon wafer to the workstation of the circular turntable and to the printing position where the double-half-sheet precision screen printer outputs the silicon wafer.

10. The silicon wafer printer suitable for double half wafer printing according to claim 9, characterized in that: The positions between the four groups of workstations of the circular turntable form a fan-shaped area, which stores the discharger elements and control components together with the middle position of the circular turntable, and then covered with a protective cover. Each half-sheet printing position has a breathable negative pressure plate, and the breathable negative pressure plate is provided with a number of breathable holes. The breathable holes pass through the roll of paper to adsorb and fix the silicon wafer on the half-sheet printing position.

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