Semiconductor chip screening device

Abstract

The utility model discloses a kind of semiconductor chip screening devices, it includes: workbench, the workbench upper end right side two ends are equipped with sliding slot, the workbench right side rear end is fixedly connected with motor two, the screw rod is rotatably connected in the sliding slot inside, the sliding rod is fixedly connected in the sliding slot inside, the U-shaped frame is slidably connected in the sliding slot inside, the U-shaped frame is threadedly connected with screw rod, the U-shaped frame is slidably connected with sliding rod, the coupling of motor two output shaft passes through workbench and is fixedly connected with screw rod, the right side upper end central position of the U-shaped frame is fixedly connected with fixed block, the lower end of the fixed block is fixedly connected with industrial camera, the rotation of motor two makes screw rod synchronous rotation, under the effect of threadedly connected, U-shaped frame moves forward along the sliding slot inside, so that the industrial camera of rear end fixed block lower end can be photographed scanning to chip, to complete screening to chip.

Description

Technical Field

[0001] This utility model relates to the field of screening technology, and in particular to a semiconductor chip screening device. Background Technology

[0002] Semiconductor chip sorting equipment is an automated system used in the later stages of chip manufacturing to perform performance testing, functional verification, yield screening, and grade classification of wafers or packaged chips. Its core function is to ensure that chips meet design specifications, reject defective products, and classify them according to performance parameters to meet different application requirements.

[0003] A search revealed Chinese Patent Publication No. CN221414067U, which discloses a semiconductor chip screening device for automatic screening of semiconductor chips. The device includes a screening box with a screening space and a discharge port, the screening space being connected to the discharge port; a storage platform installed in the screening space, on which the semiconductor chips are detachably mounted; and a screening device installed on the storage platform to screen the semiconductor chips on the storage platform. This invention offers the advantages of saving manpower and reducing error rates. However, the device uses a gripping method during use, which may damage the semiconductor chips, resulting in a lower yield rate after screening and increasing the workload of subsequent screening. Utility Model Content

[0004] The purpose of this invention is to provide a semiconductor chip sieving device that uses a suction cup in conjunction with an air pump to remove the chip after it has been sieved, thus avoiding damage to the chip during handling after sieving.

[0005] To achieve the above objectives, a semiconductor chip screening device is provided, comprising: a worktable, with grooves at both ends of the upper right side of the worktable, a motor II fixedly connected to the rear end of the right side of the worktable, a screw rotatably connected to the inner side of the grooves, a slide rod fixedly connected to the inner side of the grooves, a U-shaped frame slidably connected to the inner side of the grooves, the U-shaped frame being threadedly connected to the screw, the U-shaped frame being slidably connected to the slide rod, and a coupling of the output shaft of the motor II passing through the worktable and fixedly connected to the screw.

[0006] A fixing block is fixedly connected to the upper right side of the U-shaped frame at the center position, and an industrial camera is fixedly connected to the lower end of the fixing block.

[0007] According to the semiconductor chip screening device, a conveyor belt is provided on the left side of the upper end of the worktable, and a motor is fixedly connected to the left side of the front end of the conveyor belt. The coupling of the output shaft of the motor passes through the conveyor belt and is fixedly connected to the transmission wheel inside the conveyor belt.

[0008] According to the semiconductor chip screening device, a motor is fixedly connected to the upper end of the fixed block, a partition is fixedly connected to the middle position of the upper end of the U-shaped frame, and a gear is fixedly connected to the coupling of the front output shaft of the motor through the partition.

[0009] According to the semiconductor chip screening device, a rack is slidably connected to the inner side of the upper end of the U-shaped frame, and a hole is opened at the upper end of the U-shaped frame. The lower end of the gear passes through the hole on the inner side of the U-shaped frame and is engaged with the rack.

[0010] According to the semiconductor chip screening device, a fixed frame is fixedly connected to the lower end of the rack, a hydraulic cylinder is fixedly connected to the center of the inner side of the fixed frame, a hydraulic rod is slidably connected to the lower end of the hydraulic cylinder, and the hydraulic rod is slidably connected to the inner side of the fixed frame.

[0011] According to the semiconductor chip screening device, a hollow block is fixedly connected to the lower end of the hydraulic rod. The inner side of the hollow block adopts a hollow structure. A suction cup is fixedly connected to the lower end of the hollow block, and the top of the suction cup communicates with the hollow block.

[0012] According to the semiconductor chip screening device, an air pump is fixedly connected to the left end of the inner side of the fixed frame, and a hose is fixedly connected to the lower end of the air pump. The hose passes through the fixed frame and is fixedly connected to the hollow block, and the hose communicates with the hollow block.

[0013] According to the semiconductor chip screening device, a placement frame is fixedly connected to the upper end of the worktable, a protruding frame is fixedly connected to the inner side of the upper end of the placement frame, and table legs are fixedly connected to the lower end of the worktable.

[0014] The above-mentioned solution has the following beneficial effects:

[0015] 1. By setting up a second motor, a slide bar, a screw, a U-shaped frame, a fixing block, and an industrial camera, when the second motor rotates, it can drive the screw to rotate. Under the action of the threaded connection, the U-shaped frame moves back and forth along the slide bar in the sliding groove. The movement of the U-shaped frame causes the fixing block at the rear end of the U-shaped frame and the industrial camera at the lower end to move synchronously, so that the industrial camera can take pictures and compare each row of chips at the lower end, thereby distinguishing qualified products from defective products.

[0016] 2. By installing an air pump inside the fixed frame, with a flexible hose connected to the lower end of the pump, and the hose connected to the cutout block, a suction cup is installed at the lower end of the cutout block. The suction cup, cutout block, and flexible hose are interconnected. By pumping air, a vacuum is created inside the cutout block, allowing the suction cup to hold the chip. When the chip needs to be placed down, simply stop the air pump and start it again. External air enters the cutout block through the flexible hose along the air pump. When the internal and external atmospheric pressures are equal, the chip will fall. The chip is placed down by controlling the pick-up and drop of the chip through the suction cup, avoiding damage to the chip pins.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the overall structure of a semiconductor chip screening device according to the present invention;

[0020] Figure 2 This is a schematic diagram of some components of a semiconductor chip screening device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the lateral movement component of a semiconductor chip screening device according to the present invention;

[0022] Figure 4 This is a schematic diagram of the lifting assembly of a semiconductor chip screening device according to the present invention.

[0023] Legend:

[0024] 1. Workbench; 2. Conveyor belt; 3. Motor 1; 4. U-shaped frame; 5. Fixing block; 6. Motor 2; 7. Table leg; 8. Motor 3; 9. Placement frame; 10. Screw; 11. Slide rod; 12. Protruding frame; 13. Slide groove; 14. Gear; 15. Fixing frame; 16. Rack; 17. Partition; 18. Industrial camera; 19. Air pump; 20. Hose; 21. Suction cup; 22. Hydraulic cylinder; 23. Hydraulic rod; 24. Hollow block. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] Reference Figure 1-4This utility model discloses a semiconductor chip screening device, which includes: a workbench 1, with slide grooves 13 at both ends of the upper right side of the workbench 1, a motor 6 fixedly connected to the rear right side of the workbench 1, a screw 10 rotatably connected to the inner side of the slide grooves 13, a slide rod 11 fixedly connected to the inner side of the slide grooves 13, a U-shaped frame 4 slidably connected to the inner side of the slide grooves 13, the U-shaped frame 4 being threadedly connected to the screw 10, the U-shaped frame 4 being slidably connected to the slide rod 11, and a coupling of the output shaft of the motor 6 passing through the workbench 1 and fixedly connected to the screw 10;

[0027] A fixing block 5 is fixedly connected to the upper right side of the U-shaped frame 4 at the center position. An industrial camera 18 is fixedly connected to the lower end of the fixing block 5. The industrial camera 18 can take pictures of the chip, and the qualified products and defective products can be distinguished by comparing the pictures.

[0028] A conveyor belt 2 is provided on the upper left side of the workbench 1. A motor 3 is fixedly connected to the left front end of the conveyor belt 2. The coupling of the output shaft of the motor 3 passes through the conveyor belt 2 and is fixedly connected to the transmission wheel on the inner side of the conveyor belt 2. The rotation of the motor 3 can drive the rotating surface on the inner side of the conveyor belt 2 to rotate, thereby completing the conveying of the surface object.

[0029] The upper end of the fixed block 5 is fixedly connected to the motor 8, and the upper end of the U-shaped frame 4 is fixedly connected to the partition 17 at the center position. The coupling of the front output shaft of the motor 8 passes through the partition 17 and is fixedly connected to the gear 14. The rotation of the motor 8 can drive the gear 14 to rotate.

[0030] A rack 16 is slidably connected to the inner side of the upper end of the U-shaped frame 4. A hole is opened at the upper end of the U-shaped frame 4. The lower end of the gear 14 passes through the hole on the inner side of the U-shaped frame 4 and engages with the rack 16. The rotation of the gear 14 can cause the rack 16 at the lower end to slide left and right on the inner side of the U-shaped frame 4, thereby driving the fixed block 15 at the lower end to move.

[0031] The lower end of the rack 16 is fixedly connected to a fixed frame 15. A hydraulic cylinder 22 is fixedly connected to the center of the inner side of the fixed frame 15. A hydraulic rod 23 is slidably connected to the lower end of the hydraulic cylinder 22. The hydraulic rod 23 is slidably connected inside the fixed frame 15. When the hydraulic cylinder 22 is activated, the hydraulic rod 23 can slide upward or downward.

[0032] The lower end of the hydraulic rod 23 is fixedly connected to a hollow block 24. The inner side of the hollow block 24 adopts a hollow structure. The lower end of the hollow block 24 is fixedly connected to a suction cup 21. The top of the suction cup 21 communicates with the hollow block 24. When the hydraulic rod 23 is pushed downward, the lower hollow block 24 and the suction cup 21 can move downward, thereby making the suction cup 21 contact the semiconductor chip.

[0033] An air pump 19 is fixedly connected to the left end of the inner side of the fixed frame 15. A hose 20 is fixedly connected to the lower end of the air pump 19. The hose 20 passes through the fixed frame 15 and is fixedly connected to the hollow block 24 and communicates with the hollow block 24. When the suction cup 21 contacts the semiconductor chip, the air pump 19 is activated. Under the operation of the air pump 19, the air pressure inside the hollow block 24 decreases, so that the suction cup 21 at the lower end can adsorb the semiconductor chip.

[0034] The upper end of the workbench 1 is fixedly connected to a placement frame 9, and the inner side of the upper end of the placement frame 9 is fixedly connected to a protruding frame 12. The lower end of the workbench 1 is fixedly connected to a table leg 7. The protruding frame 12 allows the semiconductor chip to be placed around it. The lower end of the semiconductor chip pin is hollowed out, which avoids damage to the semiconductor chip pin.

[0035] Working Principle: During operation, the semiconductor chip is placed on the upper end of the protruding bracket 12 inside the placement frame 9. The protruding bracket 12 keeps the lower end of the semiconductor chip pins in a hollowed-out state, avoiding damage to the semiconductor chip pins. After the chip is placed, motor 6 is started. The rotation of motor 6 causes the front screw 10 to rotate synchronously. Under the threaded connection, the U-shaped bracket 4 moves forward. The forward movement of the U-shaped bracket 4 causes the rear fixing block 5 to move forward synchronously, thereby causing the industrial camera 18 at the lower end of the fixing block 5 to move synchronously. The industrial camera 18 can take intermittent pictures during movement. The size of the chip can be identified through the pictures taken by the industrial camera 18. After all pictures are taken and compared, motor 6 will rotate in the opposite direction, causing the U-shaped bracket 4 to move backward to the frontmost position. At this time, motor 3 is started. The rotation of motor 3 causes the front gear 14 to rotate synchronously. The rotation of gear 14 causes the lower rack 16 to slide. The sliding of rack 16 drives the lower placement frame 9 to move. At this time, the inner side of the placement frame 9... Hydraulic cylinder 22 is activated, causing the lower hydraulic rod 22 to push the cutout block 24 and the lower suction cup 21 to contact the top of the chip. When the suction cup 21 contacts the chip, the vacuum pump 19 is activated. Under the action of the vacuum pump 21, the gas inside the cutout block 24 and the suction cup 21 is drawn out along the inside of the hose 20. Under atmospheric pressure, the chip is able to be adsorbed. At this time, hydraulic cylinder 22 pumps the internal liquid, causing hydraulic cylinder 22 to move upward, thereby causing the chip to move upward. Motor 6 is then activated, causing... The chip moves forward along the placement frame 9 until it reaches the upper end of the conveyor belt 2. Upon arrival, the vacuum pump 19 stops working, and external gas enters the hollow block 24 and the inside of the suction cup 21 through the hose 20, so that the internal and external pressures are balanced, allowing the chip to fall gently to the upper end of the conveyor belt 2. The rotation of motor 3 on the left side of the conveyor belt 2 causes the chip to move to the next working area. Through the cooperation of motor 2, motor 3, hydraulic cylinder and suction pump, the good chips at the upper end of the placement frame 9 are gradually transferred to the conveyor belt 2 to reach the next area.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A semiconductor chip screening device, comprising: The workbench (1) is characterized in that the upper right side of the workbench (1) is provided with sliding grooves (13) at both ends, the rear right side of the workbench (1) is fixedly connected to a motor (6), the inner side of the sliding groove (13) is rotatably connected to a screw (10), the inner side of the sliding groove (13) is fixedly connected to a slide rod (11), the inner side of the sliding groove (13) is slidably connected to a U-shaped frame (4), the U-shaped frame (4) is threadedly connected to the screw (10), the U-shaped frame (4) is slidably connected to the slide rod (11), and the coupling of the output shaft of the motor (6) passes through the workbench (1) and is fixedly connected to the screw (10). A fixing block (5) is fixedly connected to the upper right side of the U-shaped frame (4) at the center position, and an industrial camera (18) is fixedly connected to the lower end of the fixing block (5).

2. The semiconductor chip screening device according to claim 1, characterized in that, A conveyor belt (2) is provided on the upper left side of the workbench (1). A motor (3) is fixedly connected to the left front end of the conveyor belt (2). The coupling of the output shaft of the motor (3) passes through the conveyor belt (2) and is fixedly connected to the transmission wheel inside the conveyor belt (2).

3. The semiconductor chip screening device according to claim 1, characterized in that, The upper end of the fixed block (5) is fixedly connected to the motor three (8), the upper end of the U-shaped frame (4) is fixedly connected to the partition plate (17) at the center position, and the coupling of the front output shaft of the motor three (8) passes through the partition plate (17) and is fixedly connected to the gear (14).

4. The semiconductor chip screening device according to claim 3, characterized in that, A rack (16) is slidably connected to the inner side of the upper end of the U-shaped frame (4). A hole is opened at the upper end of the U-shaped frame (4). The lower end of the gear (14) passes through the hole on the inner side of the U-shaped frame (4) and engages with the rack (16).

5. A semiconductor chip screening device according to claim 4, characterized in that, The lower end of the rack (16) is fixedly connected to a fixed frame (15), and a hydraulic cylinder (22) is fixedly connected to the center of the inner side of the fixed frame (15). The lower end of the hydraulic cylinder (22) is slidably connected to a hydraulic rod (23), and the hydraulic rod (23) is slidably connected to the inner side of the fixed frame (15).

6. A semiconductor chip screening device according to claim 5, characterized in that, The lower end of the hydraulic rod (23) is fixedly connected to a hollow block (24). The inner side of the hollow block (24) adopts a hollow structure. The lower end of the hollow block (24) is fixedly connected to a suction cup (21). The top of the suction cup (21) is connected to the hollow block (24).

7. A semiconductor chip screening device according to claim 5, characterized in that, An air pump (19) is fixedly connected to the left side of the inner side of the fixed frame (15). A hose (20) is fixedly connected to the lower end of the air pump (19). The hose (20) passes through the fixed frame (15) and is fixedly connected to the hollow block (24), and the hose (20) communicates with the hollow block (24).

8. A semiconductor chip screening device according to claim 1, characterized in that, The workbench (1) is fixedly connected to a placement frame (9) at its upper end, and a protruding frame (12) is fixedly connected to the inner side of the upper end of the placement frame (9). The workbench (1) is fixedly connected to a table leg (7) at its lower end.

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