Wafer detection device convenient for screening and used for light emitting diode processing

Abstract

The utility model discloses a light emitting diode processing wafer detection device convenient to screen, which comprises a detection box and a circuit case, the circuit case is integrally formed at the top of the detection box, a conveyor belt is arranged in the detection box in a penetrating manner, chip grooves are formed in the conveyor belt at equal intervals, and the chip grooves are connected with the circuit case. A touch control screen is embedded in the top of the circuit case; the screening assembly is arranged on the right side of the detection box and located on the lower right portion of the conveying belt, the screening assembly further comprises a base arranged on the right side of the detection box, and a flow guide plate is fixed to the left portion in the base through a supporting column, obliquely arranged and located on the lower right side of the conveying belt. And connecting pieces are rotationally connected to the positions, on the front side and the rear side of the supporting column, of the base, two U-shaped positioning blocks are welded and fixed to the right side of the detection box, the ends of the connecting pieces are clamped into the positioning blocks, detected crystal chips can be effectively subdivided, and meanwhile the detection efficiency of the chips is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of light-emitting diode (LED) testing equipment, and more specifically, to a wafer testing device for LED processing that facilitates screening. Background Technology

[0002] A diode is an electronic device made of semiconductor materials (silicon, selenium, germanium, etc.). It has unidirectional conductivity; that is, when a forward voltage is applied to the anode and cathode, the diode conducts. When a reverse voltage is applied to the anode and cathode, it conducts. In various electronic circuits, diodes are used in conjunction with resistors, capacitors, inductors, and other components to form circuits with different functions. These circuits can perform various functions such as AC rectification, modulation signal detection, limiting and clamping, and voltage regulation. Currently, during the manufacturing and assembly of LEDs, the internal wafer needs to be inspected to check for quality problems in the finished product.

[0003] A search revealed a Chinese patent (CN217595212U) that discloses a wafer inspection device for LED processing. The device includes an inspection box with a conveyor belt running through it. The conveyor belt is externally connected to a driving mechanism, and a chip slot is located at the top of the conveyor belt. A circuit chassis is located at the top of the inspection box, and an image analysis system is located at the top of the circuit chassis. A first inspection module is located on one side of the image analysis system, and a second inspection module is located below the image analysis system. This novel chip inspection device, composed of an inspection box, conveyor belt, first inspection module, second inspection module, image analysis system, flip motor, suction cup, and rotary motor, enables continuous inspection and sorting of LED crystal chips. It filters out finished chips that do not meet process requirements, replacing manual microscopic inspection, improving inspection efficiency, and facilitating the efficient production of LEDs.

[0004] The inventors discovered that while the aforementioned technology achieves continuous detection and sorting of LED crystal chips, in actual operation, when a chip detected by the first detection module fails and flows downwards, it needs to be removed by a robotic arm consisting of a flipping motor, a suction cup, and a rotating motor, placed in a sorting trough for discharge, and then reset. Chips that pass through the first detection module without problems are then gripped, flipped, and inspected on the reverse side. If a problem is found, the chip is discharged through the sorting trough again, and the robotic arm resets to continue the operation. Overall efficiency is low, and it cannot perform fine screening of problematic chips, making it inconvenient to use. Therefore, this utility model proposes a convenient chip detection device for LED processing. Utility Model Content

[0005] The purpose of this invention is to provide a convenient screening device for LED wafer inspection, which can solve the problems mentioned in the background art.

[0006] The embodiments of this utility model are implemented as follows:

[0007] A convenient wafer inspection device for processing light-emitting diodes includes: an inspection box and a circuit box. The circuit box is integrally formed on the top of the inspection box. A conveyor belt is installed through the inside of the inspection box. Chip slots are evenly spaced on the conveyor belt. A touch control screen is embedded on the top of the circuit box.

[0008] The screening assembly is located on the right side of the detection box and below the right side of the conveyor belt. The screening assembly also includes a base located on the right side of the detection box. A guide plate is fixed to the left side of the base by a support column. The guide plate is inclined and located below the right side of the conveyor belt. Connectors are rotatably connected to the base on the front and rear sides of the support column. Two sets of U-shaped positioning blocks are welded and fixed to the right side of the detection box. The end of the connector is engaged with the inside of the positioning block, and a positioning pin passes through the outside of the positioning block. The positioning pin passes through the end of the connector.

[0009] As a further preferred embodiment of this technical solution, brackets are welded and fixed on both the left and right sides of the testing box, and a conveyor roller is rotatably connected between the brackets located inside the testing box. The conveyor belt is fitted onto the conveyor roller, and a conveyor motor is fixed on the side of the bracket on one side of the testing box. The output shaft of the conveyor motor is fixedly connected to the corresponding conveyor roller.

[0010] As a further preferred embodiment of this technical solution, a rotating shaft is rotatably connected to the upper rear side of the circuit chassis, and a transparent protective plate is fixedly mounted on the rotating shaft. The transparent protective plate is located above the touch control screen, and a rubber pad is adhered and fixed to the circuit chassis behind the touch control screen. The rubber pad is in contact with the inner side of the transparent protective plate.

[0011] As a further preferred embodiment of this technical solution, the screening assembly further includes a screw rotatably connected to the right side of the base via a bearing. A guide rod is fixed on the base above the screw. A connecting seat is threaded onto the screw and slidably mounted on the guide rod. A moving motor is fixed to the left side of the base via a fixing block. A sprocket is mounted on both the output shaft of the moving motor and the end of the screw. The two sets of sprockets are connected by a chain.

[0012] As a further preferred embodiment of this technical solution, a collection box is welded and fixed to the side of the connecting seat. The collection box is provided with four sets of placement slots, and each of the four sets of placement slots contains a collection vessel. A limit block is welded and fixed to the top of the collection vessel. The collection box is located on the lower right side of the guide plate.

[0013] As a further preferred embodiment of this technical solution, the guide plate is provided with a Y-shaped guide groove, and the bottom of the collection box is equipped with pulleys.

[0014] The beneficial effects of this utility model embodiment are:

[0015] The base features guide plates and channels to guide the crystal chips discharged from the conveyor belt after testing. Positioning blocks, pins, and connectors facilitate connection between the base and the testing box, ensuring stability during screening and collection. A moving motor and screw drive the collection box via pulleys, adjusting the positions of different collection containers. This allows for finer collection of the tested crystal chips, avoiding the need for multiple actions required in existing technologies, such as using a robotic arm with a flip motor, suction cups, and a rotary motor to move defective products to the sorting trough, thus improving work efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a side view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the rear view structure of this utility model.

[0020] In the diagram: 1. Detection box; 2. Conveyor belt; 3. Chip slot; 4. Circuit chassis; 5. Touch control screen; 6. Transparent protective plate; 7. Flow guide plate; 8. Collection box; 9. Base; 10. Connector; 11. Positioning block; 12. Flow guide channel; 13. Connecting seat; 14. Collection container; 15. Placement slot; 16. Pulley; 17. Screw; 18. Guide rod; 19. Positioning pin; 20. Sprocket; 21. Moving motor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] This utility model provides a technical solution: such as Figures 1-3 As shown in this embodiment, a convenient screening device for LED processing wafer inspection includes: an inspection box 1 and a circuit box 4. The circuit box 4 is integrally formed on the top of the inspection box 1. A conveyor belt 2 is installed through the inside of the inspection box 1. Chip slots 3 are equally spaced on the conveyor belt 2. A touch control screen 5 is embedded on the top of the circuit box 4.

[0028] The screening assembly is located on the right side of the detection box 1 and below the right side of the conveyor belt 2. The screening assembly also includes a base 9 located on the right side of the detection box 1. A guide plate 7 is fixed to the left side of the base 9 by a support column. The guide plate 7 is inclined and located on the lower right side of the conveyor belt 2. Connectors 10 are rotatably connected to the base 9 on the front and rear sides of the support column. Two sets of U-shaped positioning blocks 11 are welded and fixed to the right side of the detection box 1. The end of the connector 10 is engaged inside the positioning block 11, and a positioning pin 19 passes through the outside of the positioning block 11. The positioning pin 19 passes through the end of the connector 10.

[0029] like Figure 1 and Figure 2 As shown, brackets are welded and fixed on both the left and right sides of the test box 1, and a conveyor roller is rotatably connected between the brackets located inside the test box 1. The conveyor belt 2 is fitted onto the conveyor roller, and a conveyor motor is fixed on the side of the bracket on one side of the test box 1. The output shaft of the conveyor motor is fixedly connected to the corresponding conveyor roller. The bracket facilitates the installation of the conveyor roller, and the conveyor motor facilitates the driving of the conveyor roller, thereby facilitating the movement of the conveyor belt 2 and realizing the movement of the chip.

[0030] like Figure 1 and Figure 2 As shown, a rotating shaft is rotatably connected to the upper rear side of the circuit chassis 4. A transparent protective plate 6 is fixedly mounted on the rotating shaft. The transparent protective plate 6 is located above the touch control screen 5. A rubber pad is glued and fixed to the circuit chassis 4 behind the touch control screen 5. The rubber pad is in contact with the inner side of the transparent protective plate 6. The transparent protective plate 6 connected by the rotating shaft can be rotated easily, thereby protecting the touch control screen 5 when it is not in use. The rubber pad can also limit the movement of the transparent protective plate 6 to prevent the end of the transparent protective plate 6 from contacting the touch control screen 5.

[0031] like Figure 2 and Figure 3As shown, the screening assembly also includes a screw 17 rotatably connected to the right side of the base 9 via a bearing. A guide rod 18 is fixed on the base 9 above the screw 17. A connecting seat 13 is threaded onto the screw 17 and slidably fitted onto the guide rod 18. A moving motor 21 is fixed to the left side of the base 9 via a fixing block. Sprockets 20 are fitted onto the output shaft of the moving motor 21 and the end of the screw 17. The two sets of sprockets 20 are connected by a chain. The moving motor 21 facilitates the driving of the screw 17. When the screw 17 rotates, the connecting seat 13 threaded to it can move along the guide rod 18, thereby facilitating the movement of the collection box 8.

[0032] like Figures 1-3 As shown, a collection box 8 is welded and fixed to the side of the connecting seat 13. The collection box 8 is provided with four sets of placement slots 15, and each of the four sets of placement slots 15 contains a collection container 14. A limit block is welded and fixed to the top of the collection container 14. The collection box 8 is located on the lower right side of the guide plate 7. The guide plate 7 has a guide groove 12 with a Y-shaped cross section. A pulley 16 is installed at the bottom of the collection box 8. The collection container 14 can be placed in the placement slots 15 provided on the collection box 8. The limit block makes it easy for personnel to remove the collection container 14 from the placement slot 15. At the same time, a label can be attached to the limit block to distinguish the collected chips. It should be noted that in order to accurately control the position of the collection box 8, a position sensor can be embedded in the collection box 8 at the bottom of the placement slot 15, so as to ensure that the touch control screen 5 can accurately control the position of the collection container 14 by controlling the moving motor 21.

[0033] This utility model provides a convenient screening device for LED processing wafer inspection. The specific working principle is as follows: During normal use, personnel place the crystal chips in the same direction, i.e., front or back, and transport them using conveyor belt 2. It should be noted that the circuit box 4 contains a first inspection module, a second inspection module, and a robotic arm (not shown) for inspecting the crystal chips. The robotic arm is composed of a flip motor, a suction cup, and a rotary motor. For details regarding the inspection of the crystal chips and the specific structure of the robotic arm, refer to existing technology (patent publication number CN217595212U), and therefore will not be disclosed here. The first inspection module inspects the front of the chip and records the inspection results. As the chip is transported by conveyor belt 2, it is then transported by the robotic arm... The chip is flipped over and inspected by the second detection module, and the detection structure is recorded. Then the chip is reset. During the process, if a chip has a problem during the first inspection, the control system will not control the robot to remove it. During the second inspection, the robot will not remove the problematic chip. It should be noted that the four sets of collecting containers 14 in the collection box 8 collect chips damaged on the front, chips damaged on the back, chips damaged on both sides, and qualified chips, respectively. When the conveyor belt 2 delivers the inspected chips and they fall into the guide trough 12, the moving motor 21 is controlled to move the collection box 8, thereby moving the four sets of collecting containers 14. This allows for the storage of chips with different detection structures, achieving fine screening. At the same time, it can reduce the operation process of the robot and further improve the detection efficiency.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A convenient wafer inspection device for light-emitting diode processing, characterized in that, include: The test box (1) and the circuit box (4) are integrally formed on the top of the test box (1). A conveyor belt (2) is installed inside the test box (1). Chip slots (3) are equally spaced on the conveyor belt (2). A touch control screen (5) is embedded on the top of the circuit box (4). The screening assembly is located on the right side of the detection box (1) and below the right side of the conveyor belt (2). The screening assembly also includes a base (9) located on the right side of the detection box (1). A guide plate (7) is fixed to the left side of the base (9) by a support column. The guide plate (7) is inclined and located below the right side of the conveyor belt (2). Connectors (10) are rotatably connected to the base (9) on the front and rear sides of the support column. Two sets of U-shaped positioning blocks (11) are welded and fixed to the right side of the detection box (1). The end of the connector (10) is engaged inside the positioning block (11), and a positioning pin (19) passes through the outside of the positioning block (11). The positioning pin (19) passes through the end of the connector (10).

2. The convenient screening wafer inspection device for light-emitting diode processing according to claim 1, characterized in that, The detection box (1) is welded and fixed with brackets on both the left and right sides, and a conveyor roller is rotatably connected between the brackets located inside the detection box (1). The conveyor belt (2) is fitted onto the conveyor roller, and a conveyor motor is fixed on the side of the bracket on one side of the detection box (1). The output shaft of the conveyor motor is fixedly connected to the corresponding conveyor roller.

3. The convenient screening wafer inspection device for light-emitting diode processing according to claim 1, characterized in that, The circuit chassis (4) is rotatably connected to the upper rear side of the rotating shaft, and a transparent protective plate (6) is fixedly mounted on the rotating shaft. The transparent protective plate (6) is located above the touch control screen (5), and a rubber pad is glued and fixed on the circuit chassis (4) behind the touch control screen (5). The rubber pad is in contact with the inner side of the transparent protective plate (6).

4. The convenient screening wafer inspection device for light-emitting diode processing according to claim 1, characterized in that, The screening assembly also includes a screw (17) rotatably connected to the right side of the base (9) via a bearing. A guide rod (18) is fixed on the base (9) above the screw (17). A connecting seat (13) is threaded onto the screw (17) and slidably mounted on the guide rod (18). A moving motor (21) is fixed on the left side of the base (9) via a fixing block. A sprocket (20) is mounted on the output shaft of the moving motor (21) and the end of the screw (17). The two sets of sprockets (20) are connected by a chain.

5. A convenient screening device for detecting light-emitting diode (LED) wafers according to claim 4, characterized in that, A collection box (8) is welded and fixed to the side of the connecting seat (13). The collection box (8) is provided with four sets of placement slots (15), and each of the four sets of placement slots (15) contains a collection vessel (14). A limit block is welded and fixed to the top of the collection vessel (14). The collection box (8) is located on the lower right side of the guide plate (7).

6. The convenient screening wafer inspection device for light-emitting diode processing according to claim 5, characterized in that, The guide plate (7) has a Y-shaped guide groove (12) on its surface, and the bottom of the collection box (8) is equipped with a pulley (16).

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