Selecting device for chip crystal grains

Abstract

The utility model discloses a picking device for chip crystal grains, which comprises a picking conveying belt and a chip body, the chip body is positioned on the picking conveying belt, a rotating support is arranged on the outer side of the picking conveying belt, an upper conveying belt is rotatably mounted on the rotating support, the upper conveying belt is positioned above the picking conveying belt, and the chip body is positioned above the upper conveying belt. According to the selecting device for the chip crystal grains, in the moving process of the upper conveying belt, a second conductive block can be driven to move and make contact with a first conductive block, at the moment, an electromagnetic plate is powered on, a magnetic field is generated, the crystal grains mixed with magnetic powder ink dots are sucked out, and the crystal grains are made to be separated from a chip body; after the electromagnetic plate is powered on to absorb the crystal grains, along with continuous conveying of the upper conveying belt, after conveying, the second conductive block is separated from the first conductive block, the electromagnetic plate is powered off, the absorbed crystal grains fall down and fall into the collecting frame, and the collecting operation is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor processing, in particular to a device for selecting chip grains. Background Art

[0002] In the process of manufacturing chips, there is a process for selecting defective dies. After the unqualified dies are found in the test, an ink dot is put on the unqualified dies as a failure mark. The tested wafers can be directly shipped to the downstream packaging manufacturers. The packaging manufacturers need to select the unqualified dies. Currently, they are manually selected one by one. Due to the large daily chip output, the labor required to select the defective dies is huge.

[0003] After searching, the patent with application number CN201711301635.5 discloses a fully automatic grain sorting machine, which uses an electromagnetic plate to generate a magnetic field by energizing the electromagnetic plate to suck the wafer mixed with magnetic powder ink dots from the wafer and separate it from the wafer. During the sorting process, the electromagnetic plate needs to move back and forth to absorb and scrape, and the back and forth movement repeats the moving path. It takes a long time to wait for the chip to be placed, which will increase the sorting time and slow the picking speed of chip grains. For this reason, a sorting device for chip grains is proposed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a device for selecting chip grains to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for selecting chip grains comprises a selecting conveyor belt and a chip body, wherein the chip body is located on the selecting conveyor belt, a rotating bracket is provided on the outer side of the selecting conveyor belt, an upper conveyor belt is rotatably mounted on the rotating bracket, the upper conveyor belt is located above the selecting conveyor belt, a plurality of rubber connecting blocks are fixedly mounted on one side of the upper conveyor belt, an electromagnetic plate is fixedly mounted on one side of the plurality of rubber connecting blocks, a mobile triggering assembly is provided on the rotating bracket, a collecting frame is provided below the upper conveyor belt, the collecting frame is located on one side of the selecting conveyor belt, a scraping assembly is provided on the collecting frame, and the scraping assembly is adapted to the electromagnetic plate.

[0007] Preferably, the mobile trigger assembly includes an insulating plate fixedly installed below the rotating bracket, the insulating plate is located above the selecting conveyor belt, the bottom side of the insulating plate is connected to a first conductive block, an insulating bracket is fixedly installed on one side of the upper conveyor belt, one side of the insulating bracket is connected to a second conductive block, the insulating bracket is located on one side of the electromagnetic plate, and the first conductive block and the second conductive block are adapted to each other.

[0008] Preferably, a fixed cylinder is fixedly installed on the bottom side of the rotating bracket, a movable column is fixedly installed on the top side of the insulating plate, the top end of the movable column extends into the fixed cylinder and is fixedly installed with one end of an extrusion spring, and the other end of the extrusion spring is fixedly installed on the top inner wall of the fixed cylinder.

[0009] Preferably, an arc-shaped guide block is fixedly mounted on one side of the insulating plate, the arc-shaped guide block is arranged in an inclined direction and is adapted to the second conductive block.

[0010] Preferably, the scraping assembly includes two support blocks fixedly mounted on the top side of the collecting frame, U-shaped blocks are fixedly mounted on the top sides of the two support blocks, and the same scraper is fixedly mounted on the top sides of the two U-shaped blocks, and the scraper is adapted to the electromagnetic plate.

[0011] Preferably, an arc-shaped contact block is fixedly mounted on one side of the U-shaped block, and an opening of the arc-shaped contact block is tilted downward and matched with the electromagnetic plate.

[0012] Preferably, the selection conveyor belt and the upper conveyor belt are both provided with conveyor rollers, and one side of the conveyor rollers is connected to a driving motor.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the device for selecting chip grains, when the upper conveyor belt moves, will drive the second conductive block to move and contact the first conductive block. At this time, the electromagnetic plate is energized to generate a magnetic field, which absorbs the grains mixed with magnetic powder and ink dots and separates them from the chip body, thereby completing the selection operation. After the electromagnetic plate is energized to absorb the grains, it will be continuously conveyed by the upper conveyor belt. After the conveying, the second conductive block will separate from the first conductive block, the electromagnetic plate will be powered off, and the absorbed grains will fall and fall into the collection frame, completing the collection operation. At the same time, a scraping component is set, and the scraper can scrape the grains that have not fallen on the electromagnetic plate and remove them cleanly. Multiple electromagnetic plates are arranged on the upper conveyor belt, and they are transported by rotation. There is no need to wait for a single electromagnetic plate to work, and it takes a lot of time to move back and forth, which greatly saves the selection time and improves the work speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the utility model in cross section;

[0016] Figure 3 It is a schematic diagram of the structure of the utility model in partial section;

[0017] Figure 4 It is a schematic diagram of a partially exploded structure of the utility model;

[0018] Figure 5 For this utility model Figure 2 Schematic diagram of the structure of part A.

[0019] In the figure: 1. Selection conveyor belt; 2. Chip body; 3. Rotating bracket; 4. Upper conveyor belt; 5. Rubber connecting block; 6. Electromagnetic plate; 7. Fixed cylinder; 8. Movable column; 9. Extrusion spring; 10. Insulating plate; 11. First conductive block; 12. Arc guide block; 13. Insulating bracket; 14. Second conductive block; 15. Collecting frame; 16. Support block; 17. U-shaped block; 18. Scraper; 19. Arc contact block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: Refer to Figure 1-5 , a device for selecting chip grains, comprising a selecting conveyor belt 1 and a chip body 2, the chip body 2 is located on the selecting conveyor belt 1, a rotating bracket 3 is provided on the outer side of the selecting conveyor belt 1, an upper conveyor belt 4 is rotatably installed on the rotating bracket 3, the upper conveyor belt 4 is located above the selecting conveyor belt 1, a plurality of rubber connecting blocks 5 are fixedly installed on one side of the upper conveyor belt 4, an electromagnetic plate 6 is fixedly installed on one side of the plurality of rubber connecting blocks 5, the setting of the rubber connecting blocks 5 can be insulated, and at the same time, when the upper conveyor belt 4 rotates at the end, it will not affect the movement of the electromagnetic plate 6, a moving trigger component is provided on the rotating bracket 3, a collecting frame 15 is provided below the upper conveyor belt 4, the collecting frame 15 is located on one side of the selecting conveyor belt 1, a scraping component is provided on the collecting frame 15, the scraping component is adapted to the electromagnetic plate 6, the selecting conveyor belt 1 and the upper conveyor belt 4 are provided with conveying rollers, and one side of the conveying rollers is connected to a driving motor.

[0022] Specifically, the mobile trigger assembly includes an insulating plate 10 fixedly installed below the rotating bracket 3, the insulating plate 10 is located above the selection conveyor belt 1, the bottom side of the insulating plate 10 is connected to the first conductive block 11, and an insulating bracket 13 is fixedly installed on one side of the upper conveyor belt 4, and a second conductive block 14 is connected to one side of the insulating bracket 13. The insulating bracket 13 is located on one side of the electromagnetic plate 6, and the first conductive block 11 and the second conductive block 14 are adapted to each other. During the movement of the upper conveyor belt 4, the insulating bracket 13 will be driven to move, and the second conductive block 14 will be driven to move at the same time. After moving to the top of the selection conveyor belt 1, the electromagnetic plate 6 will be located above the chip body 2. At this time, the second conductive block 14 on one side of the electromagnetic plate 6 will contact the first conductive block 11. At this time, the electromagnetic plate 6 is energized to generate a magnetic field to absorb the grains mixed with magnetic powder ink dots, so that they are separated from the chip body 2, thereby completing the selection operation.

[0023] Specifically, a fixed cylinder 7 is fixedly installed on the bottom side of the rotating bracket 3, and a movable column 8 is fixedly installed on the top side of the insulating plate 10. The top end of the movable column 8 extends into the fixed cylinder 7 and is fixedly installed with one end of an extrusion spring 9. The other end of the extrusion spring 9 is fixedly installed on the inner wall of the top side of the fixed cylinder 7. An arc guide block 12 is fixedly installed on one side of the insulating plate 10. The arc guide block 12 is inclined and matched with the second conductive block 14. The arc guide block 12 is arranged to facilitate path guidance of the movement of the second conductive block 14. The extrusion spring 9 can provide a certain driving force so that the first conductive block 11 and the second conductive block 14 are in contact and energized.

[0024] Specifically, the scraping assembly includes two support blocks 16 fixedly mounted on the top side of the collecting frame 15, the top sides of the two support blocks 16 are fixedly mounted with U-shaped blocks 17, the top sides of the two U-shaped blocks 17 are fixedly mounted with the same scraper 18, the scraper 18 is adapted to the electromagnetic plate 6, and one side of the U-shaped block 17 is fixedly mounted with an arc-shaped contact block 19, the opening of the arc-shaped contact block 19 is tilted downward and adapted to the electromagnetic plate 6, after the electromagnetic plate 6 is energized to absorb the grains, it will be continuously transported by the upper conveyor belt 4, after the conveying, the second conductive block 14 is separated from the first conductive block 11, the electromagnetic plate 6 will be powered off, and the absorption The grains will fall and land in the collection frame 15 to complete the collection operation. At the same time, a scraping component is provided. The scraper 18 on the scraping component can scrape the grains that have not fallen on the electromagnetic plate 6 and remove them cleanly. The arc-shaped contact block 19 is provided to better guide the scraper 18 to scrape the electromagnetic plate 6. The scraper 18 will not block one side of the electromagnetic plate 6, thereby causing damage to the electromagnetic plate 6. A plurality of electromagnetic plates 6 are provided on the upper conveyor belt 4. Through rotation and transportation, there is no need to wait for a single electromagnetic plate 6 to work. It takes more time to move back and forth, which greatly saves the picking time and improves the working speed.

[0025] During use: when selecting the grains on the chip body 2, the chip body 2 to be selected is placed on the selection conveyor belt 1 and slowly conveyed. At this time, the upper conveyor belt 4 runs at the same time, driving the electromagnetic plate 6 to rotate and convey. A rubber connecting block 5 is connected between the electromagnetic plate 6 and the upper conveyor belt 4, which can be insulated. At the same time, when the upper conveyor belt 4 rotates at the end, it will not affect the movement of the electromagnetic plate 6. During the movement of the upper conveyor belt 4, it will drive the insulating bracket 13 to move and drive the second conductive block 14 to move. After moving to the top of the selection conveyor belt 1, the electromagnetic plate 6 will be located above the chip body 2. At this time, the second conductive block 14 on one side of the electromagnetic plate 6 will contact the first conductive block 11. At this time, the electromagnetic plate 6 is energized to generate a magnetic field, which absorbs the grains mixed with magnetic powder ink dots and separates them from the chip body 2, thereby completing the selection operation. The arc-shaped guide block 12 is provided to facilitate the movement of the second conductive block 14 Path guidance, the extrusion spring 9 is set, which can provide a certain driving force, so that the first conductive block 11 and the second conductive block 14 are in contact and energized. After the electromagnetic plate 6 is energized to absorb the grains, it will be continuously transported by the upper conveyor belt 4. After transportation, the second conductive block 14 is separated from the first conductive block 11, and the electromagnetic plate 6 will be powered off. The absorbed grains will fall and fall into the collection frame 15 to complete the collection operation. At the same time, a scraping component is set, and the scraper 18 on the scraping component can scrape the grains that have not fallen on the electromagnetic plate 6 and remove them cleanly. The arc-shaped contact block 19 is set to better guide the scraper 18 to scrape the electromagnetic plate 6. The scraper 18 will not block one side of the electromagnetic plate 6, thereby causing damage to the electromagnetic plate 6. A plurality of electromagnetic plates 6 are provided on the upper conveyor belt 4. Through rotation and transportation, there is no need to wait for a single electromagnetic plate 6 to work. It takes a lot of time to move back and forth, which greatly saves the picking time, improves the working speed, and is easy to use.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for selecting chip dies, comprising a selection conveyor belt (1) and a chip body (2), characterized in that: The chip body (2) is located on the selection conveyor belt (1); a rotating bracket (3) is provided on the outer side of the selection conveyor belt (1); an upper conveyor belt (4) is rotatably mounted on the rotating bracket (3); the upper conveyor belt (4) is located above the selection conveyor belt (1); a plurality of rubber connecting blocks (5) are fixedly mounted on one side of the upper conveyor belt (4); an electromagnetic plate (6) is fixedly mounted on one side of each of the plurality of rubber connecting blocks (5); a mobile triggering component is provided on the rotating bracket (3); a collecting frame (15) is provided below the upper conveyor belt (4); the collecting frame (15) is located on one side of the selection conveyor belt (1); a scraping component is provided on the collecting frame (15); and the scraping component is compatible with the electromagnetic plate (6).

2. A chip die selection device according to claim 1, characterized in that: The mobile trigger assembly comprises an insulating plate (10) fixedly mounted below a rotating bracket (3), the insulating plate (10) being located above the selection conveyor belt (1), the bottom side of the insulating plate (10) being connected to a first conductive block (11), an insulating bracket (13) being fixedly mounted on one side of the upper conveyor belt (4), one side of the insulating bracket (13) being connected to a second conductive block (14), the insulating bracket (13) being located on one side of the electromagnetic plate (6), and the first conductive block (11) and the second conductive block (14) being adapted to each other.

3. The device for selecting chip dies according to claim 2, characterized in that: A fixed cylinder (7) is fixedly mounted on the bottom side of the rotating bracket (3), a movable column (8) is fixedly mounted on the top side of the insulating plate (10), the top end of the movable column (8) extends into the fixed cylinder (7) and is fixedly mounted on one end of a compression spring (9), and the other end of the compression spring (9) is fixedly mounted on the inner wall of the top side of the fixed cylinder (7).

4. The device for selecting chip dies according to claim 2, characterized in that: An arc-shaped guide block (12) is fixedly mounted on one side of the insulating plate (10); the arc-shaped guide block (12) is arranged in an inclined direction and is adapted to the second conductive block (14).

5. The device for selecting chip dies according to claim 1, characterized in that: The scraping assembly comprises two support blocks (16) fixedly mounted on the top side of the collecting frame (15), a U-shaped block (17) fixedly mounted on the top side of the two support blocks (16), and a same scraper (18) fixedly mounted on the top side of the two U-shaped blocks (17), the scraper (18) being compatible with the electromagnetic plate (6).

6. The device for selecting chip dies according to claim 5, characterized in that: An arc-shaped contact block (19) is fixedly mounted on one side of the U-shaped block (17); the opening of the arc-shaped contact block (19) is tilted downward and is adapted to fit the electromagnetic plate (6).

7. The device for selecting chip dies according to claim 1, characterized in that: The selection conveyor belt (1) and the upper conveyor belt (4) are both provided with conveyor rollers, and one side of the conveyor rollers is connected to a driving motor.

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