Automatic sorting and pushing mechanism for semiconductor chips
By using a polyurethane elastic sheet in an automated semiconductor chip sorting and pushing mechanism, the problem of chip damage caused by rigid contact is solved, achieving efficient and safe chip sorting and pushing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING JIUTANG INFORMATION TECH CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-07-21
AI Technical Summary
The pushing components of existing automatic semiconductor chip sorting and pushing mechanisms are mostly made of rigid materials. When they come into direct contact with chips that are not resistant to damage, they are prone to scratches, damage to the packaging, and breakage due to improper force, and cannot effectively buffer the impact force.
Polyurethane elastic sheets are used as the contact parts of the chip pusher blocks. Combined with pneumatic drive and elastic protection pusher, the pusher force is buffered by elastic deformation to avoid hard contact and uneven force, thus ensuring safe chip sorting.
It significantly improves the safety and flexibility of chip sorting and pushing, avoids chip surface scratches and package damage, improves sorting accuracy and adaptability, and reduces maintenance costs.
Smart Images
Figure CN224529922U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of semiconductor manufacturing technology, specifically relating to an automatic sorting and pushing mechanism for semiconductor chips. Background Technology
[0002] The automated sorting and pushing mechanism for semiconductor chips is a key automated equipment component in the back-end (packaging and testing) stage of semiconductor chip manufacturing. It is mainly used to automatically classify and screen bare chips after wafer dicing and finished packaged chips, and to accurately push chips of different specifications and yields to target workstations (such as testing platforms, storage boxes, and packaging molds) through pneumatic or electric drive. It replaces traditional manual sorting and pushing, greatly improving chip sorting efficiency and pushing accuracy. It is a core piece of equipment to ensure the continuity of large-scale chip mass production and reduce labor costs. It is widely used in chip production processes in consumer electronics, automotive electronics, industrial control and other fields.
[0003] However, existing automatic semiconductor chip sorting and pushing mechanisms mostly use rigid materials (such as metal push plates or hard plastic blocks) to directly contact the chips. Since chips (especially bare chips and thin-packaged chips) have extremely weak resistance to damage, the silicon-based surface of bare chips is easily scratched due to hard contact, leading to circuit failure. Thin-packaged chips are prone to cracking of the package shell due to uneven pushing force, which seriously affects the chip yield. Furthermore, the impact force of rigid pushing components cannot be buffered. If the pushing force is not properly controlled (such as pneumatic drive pressure fluctuations), it can easily lead to chip breakage. Utility Model Content
[0004] The purpose of this invention is to provide an automatic sorting and pushing mechanism for semiconductor chips, in order to solve the problems mentioned in the background art, where the pushing components of existing mechanisms are mostly made of rigid materials, directly contact chips with weak resistance to damage, the bare silicon-based chips are easily scratched and fail, and the rigid components cannot buffer the impact force, causing the chips to break due to improper force, resulting in a large loss of high-value chips.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic semiconductor chip sorting and pushing mechanism, comprising a sorting and pushing cylinder and a U-shaped mounting bracket disposed at the front end of the sorting and pushing cylinder. The U-shaped opening of the U-shaped mounting bracket faces rearward and is horizontally disposed at the front end of the sorting and pushing cylinder. A cylinder shaft is disposed in the sorting and pushing cylinder, and a fixing plate fixing flange is disposed at the front end of the cylinder shaft. A pushing block fixing plate is fixed to the front end of the fixing plate fixing flange by screws. A chip pushing block is disposed at the bottom front end of the pushing block fixing plate, and an elastic protective pushing device is disposed at the front end of the chip pushing block.
[0006] Preferably, the elastic protection pushing device includes a bracket mounting plate and a strip bracket. The strip bracket is laterally attached to the front outer wall of the chip pushing block and is flush with the bottom outer wall of the chip pushing block. The left and right sides of the center of the rear outer wall of the strip bracket are fixed with bracket mounting plates. The two bracket mounting plates are respectively attached to the left and right outer walls of the chip pushing block, and the two bracket mounting plates are fixedly connected to the chip pushing block by screws.
[0007] Preferably, the elastic protection pushing device further includes a metal connecting block A, a metal connecting block B, and a T-shaped disassembly slot. The metal connecting block A and the metal connecting block B are fixed at the left and right ends of the strip bracket and on the outer wall of the front end, respectively. The metal connecting block A and the metal connecting block B are flush with the outer wall of the bottom end of the strip bracket. The metal connecting block A and the metal connecting block B are vertically penetrated by a T-shaped disassembly slot, and the end of the two T-shaped disassembly slots facing the center of the strip bracket is also open.
[0008] Preferably, the elastic protective pushing device further includes a strip-shaped elastic pushing piece, a T-shaped disassembly and fixing block, and a metal fixing top piece. There are two T-shaped disassembly and fixing blocks, which are respectively inserted into the T-shaped disassembly and fixing slots inside the metal connecting block A and the metal connecting block B. The strip-shaped elastic pushing piece is connected between the two T-shaped disassembly and fixing blocks, and a metal fixing top piece is provided at the top of each of the two T-shaped disassembly and fixing blocks.
[0009] Preferably, after the T-shaped disassembly and fixing block is fully inserted into the T-shaped disassembly and fixing slot from top to bottom, the metal fixing top plate is attached to the top outer wall of the metal connecting block A and the metal connecting block B, so as to make the bottom outer wall of the T-shaped disassembly and fixing block and the strip elastic push plate flush with the bottom outer wall of the strip bracket and the chip push block. The metal fixing top plate is provided with fixing screws near the four corners, and the metal fixing top plate is fixedly connected to the metal connecting block A and the metal connecting block B by fixing screws.
[0010] Preferably, the strip-shaped elastic push piece is positioned laterally in front of the strip-shaped bracket and is parallel to the strip-shaped bracket. After the two T-shaped disassembly and assembly fixing blocks are respectively inserted into the two T-shaped disassembly and assembly slots, the strip-shaped elastic push piece is in a taut state.
[0011] Preferably, the sorting and pushing cylinder includes a front end cover, a cylinder body, a metal reinforcing connecting rod, a rear end cover, and a pressure supply port. The cylinder body is provided with a front end cover and a rear end cover at its front and rear ends, respectively, and the front end cover and the rear end cover are fixedly connected to each other near the four corners with metal reinforcing connecting rods.
[0012] Preferably, a pressure supply hole is provided inside the center of the top of the rear end cover, and the pressure supply hole is connected to the inside of the cylinder body. The pressure supply hole is connected to an external pressure supply pipe through a connector.
[0013] Preferably, the U-shaped mounting bracket has a pre-drilled hole at its center, and a protective guide sleeve is provided in the hole. The front end of the cylinder shaft passes through the protective guide sleeve, and the cylinder shaft can move back and forth in the protective guide sleeve. The rear end of the cylinder shaft is fixedly connected to the plunger inside the cylinder body.
[0014] Compared with the prior art, the present invention provides an automatic sorting and pushing mechanism for semiconductor chips, which has the following advantages:
[0015] This invention adds a novel elastic protective pushing device to the chip pushing block used for pushing semiconductor chips. This device uses a polyurethane elastic sheet as the core contact component, replacing the chip pushing block to directly contact the semiconductor chip. While completing the sorting and pushing task, it effectively avoids chip damage due to hard contact or uneven pushing force. It also features convenient disassembly and assembly, strong adaptability, and significantly improves the safety and flexibility of chip sorting and pushing. The core component of the elastic protective pushing device is a strip-shaped elastic pushing sheet, preferably made of polyurethane material with a Shore hardness of 50-70D. This material has both excellent elastic deformation capability and resistance to compression permanent deformation. When the device contacts and pushes the chip, the polyurethane elastic sheet can transform the pushing impact force from the point force of traditional rigid contact to the surface force through its own micro-elastic deformation. This can effectively avoid the surface scratches caused by hard contact between traditional metal or hard plastic pushing blocks and chips (especially for the silicon-based surface of bare chips). At the same time, the stress distribution of the polyurethane material is uniform, which can ensure that the pushing force is evenly transmitted along the chip contact surface and prevent local stress from exceeding the chip's tolerance threshold. It is particularly suitable for chips with weak damage resistance or high-value precision chips.
[0016] After the two T-shaped mounting and disassembly blocks of the device are inserted into the T-shaped mounting and disassembly slots, the polyurethane elastic sheet is in a taut state. When taut, it can provide stable pushing support force to ensure that the chip moves along the preset trajectory without shaking, so as to meet the high-precision sorting requirements of semiconductor chips. When the elastic sheet loses elasticity or wears in some areas due to long-term use, you only need to remove the screws of the metal fixing plate to take out the T-shaped mounting and disassembly block and replace the new polyurethane elastic sheet. There is no need to disassemble the chip pushing block or the sorting pushing cylinder. Compared with the traditional method of replacing the entire pushing component, its maintenance efficiency is higher, thereby reducing equipment downtime costs. Attached Figure Description
[0017] Figure 1 This is a left-side three-dimensional structural diagram of an automatic semiconductor chip sorting and pushing mechanism according to the present invention.
[0018] Figure 2 This is a top-view planar structural diagram of an automatic semiconductor chip sorting and pushing mechanism according to the present invention.
[0019] Figure 3This is a front-view three-dimensional structural diagram of the elastic protective pushing device of this utility model.
[0020] Figure 4 This is a three-dimensional disassembly diagram of the elastic protective pushing device of this utility model.
[0021] In the diagram: 1. Front end cover; 2. Cylinder body; 3. Metal reinforcing connecting rod; 4. Rear end cover; 5. Pressure supply port; 6. U-shaped mounting bracket; 7. Cylinder shaft; 8. Elastic protective pushing device; 9. Chip pushing block; 10. Pushing block fixing plate; 11. Fixing plate fixing flange; 12. Metal connecting block A; 13. Bracket mounting piece; 14. Strip bracket; 15. Strip elastic pushing piece; 16. Metal connecting block B; 17. T-shaped disassembly and assembly fixing block; 18. Metal fixing top piece; 19. T-shaped disassembly and assembly slot. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] This utility model provides, for example Figure 1-4The diagram illustrates an automated semiconductor chip sorting and pushing mechanism. This mechanism is designed with a core of pneumatic drive combined with elastic protective pushing. Through precise structural adaptation and material selection, it achieves efficient and safe chip sorting and pushing. The core of the sorting and pushing cylinder is the cylinder body 2, with a front cover 1 and a rear cover 4 mounted at its front and rear ends, respectively, forming a sealed cylinder chamber. The principle of this sealing structure is to ensure a stable air pressure inside the cylinder, providing a power basis for the plunger movement and preventing insufficient driving force due to air pressure leakage. Metal reinforcing connecting rods 3 (in a rectangular arrangement) are fixedly connected near the four corners of the front cover 1 and the rear cover 4. The principle is that the connecting rods provide rigid support to the front and rear covers 4, preventing deformation of the cylinder body 2 due to internal and external pressure differences during high-pressure air supply, while simultaneously reinforcing the cylinder. The overall structural strength is enhanced to prevent loosening of the connection between the end cap and the cylinder body due to long-term reciprocating motion, thus extending the service life of the cylinder. A pressure supply port 5 is located inside the center of the top of the rear end cap 4. This port 5 is connected to the inside of the cylinder body 2 and is connected to an external pressure supply pipe via a connector. The working principle is that external compressed air enters the cylinder body 2 through the pressure supply port 5, pushing the plunger inside the cylinder body to move back and forth along the cylinder axis. Since the rear end of the cylinder shaft 7 is fixedly connected to the plunger, the movement of the plunger directly drives the cylinder shaft 7 to synchronously extend and retract, converting pneumatic energy into mechanical linear motion. This provides a stable driving force for chip pushing. Compared to electric drive, pneumatic drive has a faster response speed and convenient driving force adjustment (the thrust can be controlled by adjusting the air supply pressure), adapting to the high-frequency and high-precision requirements of chip sorting.
[0024] like Figure 1 and Figure 2 As shown, the U-shaped opening of the U-shaped mounting bracket 6 faces backward and is laterally positioned at the front end of the sorting and pushing cylinder. Its core function is to provide front-end support and motion guidance for the cylinder shaft 7. A through hole is pre-drilled at the center of the U-shaped mounting bracket 6, into which a protective guide sleeve (made of wear-resistant copper) is installed. The front end of the cylinder shaft 7 passes through the protective guide sleeve and can move back and forth within it. The protective guide sleeve restricts the radial wobble of the cylinder shaft 7, ensuring that the cylinder shaft 7 moves only axially back and forth, preventing the front-end pushing component from shifting due to cylinder shaft 7 wobble, thus affecting the chip pushing accuracy. Simultaneously, the protective guide sleeve reduces the contact area between the cylinder shaft 7 and the U-shaped mounting bracket. The direct friction of the perforated frame 6 reduces the wear on the surface of the cylinder shaft 7 and extends the service life of the shaft. The front end of the cylinder shaft 7 is equipped with a fixing plate fixing flange 11, which is fixedly connected to the rear end of the push block fixing plate 10 by screws. The bottom front end of the push block fixing plate 10 is fixed to the chip push block 9 (the two are connected by screws). This multi-stage fixing structure of flange and fixing plate ensures that the driving force of the cylinder shaft 7 can be transmitted to the chip push block 9 through a rigid transmission path, avoiding loosening or deformation of components during force transmission, and ensuring that the push block can move synchronously with the cylinder shaft 7 to achieve stable chip pushing.
[0025] like Figure 1 , Figure 3 and Figure 4 As shown, the elastic protective pusher 8 is connected to the front end of the chip pusher block 9 and is the core component that directly contacts the chip. Its structural design and functional principle are closely integrated. The strip-shaped support 14 of the elastic protective pusher 8 is horizontally attached to the front outer wall of the chip pusher block 9, and the bottom end of the strip-shaped support 14 is flush with the bottom outer wall of the chip pusher block 9. The principle of the flush design is to ensure that the subsequent elastic pusher is in a horizontal state when it contacts the chip, and to avoid tilting or jamming of the chip during push due to height difference. On both sides of the center of the rear outer wall of the strip-shaped support 14... Each component is fixed with a bracket mounting plate 13. Two bracket mounting plates 13 are respectively attached to the outer walls of the left and right ends of the chip push block 9 and are connected by screws. This method of attaching to both sides and fixing with screws increases the contact area between the bracket and the push block, disperses the pushing force, avoids excessive force at a single point causing bracket deformation, and ensures a stable connection between the entire device and the push block. Metal connecting blocks A12 and B16 are respectively fixed to the front outer walls of the left and right ends of the strip bracket 14. The bottom ends of both are flush with the bottom end of the strip bracket 14. A T-shaped disassembly slot 19 is vertically inserted (the slot opens at one end facing the center of the strip-shaped bracket 14). The T-shaped slot is designed to provide a precise positioning and quick insertion channel for the T-shaped disassembly fixing block 17. The T-shaped structure prevents the fixing block from moving up and down during the pushing process, ensuring the relative position stability of the fixing block and the connecting block. Two T-shaped disassembly fixing blocks 17 are respectively inserted into the T-shaped disassembly slot 19, and a strip-shaped elastic push plate 15 connects the two. The strip-shaped elastic push plate 15 is made of polyurethane material with a Shore hardness of 50-70D. When the T-shaped mounting and disassembling block 17 is fully inserted into the slot from top to bottom, its top metal fixing plate 18 fits against the top outer wall of the metal connecting block A12 and the metal connecting block B16, and is locked by the fixing screws at the four corners. The principle of this structure combining insertion and screw fixing is that it facilitates the quick replacement of the elastic push plate (the fixing block and elastic plate can be removed by removing the screws), and ensures that the position of the elastic plate is accurate after installation. At the same time, the metal fixing plate 18 can further restrict the axial movement of the fixing block and prevent the fixing block from falling out during the pushing process.
[0026] like Figure 1 , Figure 3 and Figure 4As shown, the strip-shaped elastic pusher 15 is positioned laterally in front of the strip-shaped support 14 and parallel to the support. After the two T-shaped mounting and dismounting blocks 17 are inserted, the elastic sheet is in a taut state. The principle of the taut state is to ensure that the elastic sheet has initial support force, avoiding ineffective contact with the chip during push due to the elastic sheet being loose. The elastic properties of the polyurethane material can buffer the push impact force through micro-deformation when contacting the chip (buffering amplitude 0.1-0.3mm), transforming rigid contact into elastic contact, avoiding scratches on the chip surface or damage to the package. At the same time, the horizontal taut design of the elastic sheet ensures that the push force is applied evenly. To prevent chip breakage due to excessive local force at the chip contact surface, the strip-shaped elastic pusher 15 achieves both safe pushing and precise positioning. Its elastic properties can adapt to chips of different thicknesses and materials. Whether it is a thin bare chip or a finished chip with a package, the elastic sheet can conform to the chip contact surface through its own deformation, ensuring effective contact during pushing. The strip-shaped elastic pusher 15 of the corresponding length can be replaced according to the chip size, without replacing the entire pushing device. It adapts to the sorting and pushing needs of chips of various specifications, reduces the procurement cost of dedicated pushing components, and improves the flexibility of the device.
[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic semiconductor chip sorting and pushing mechanism, comprising a sorting and pushing cylinder and a U-shaped mounting bracket (6) disposed at the front end of the sorting and pushing cylinder, wherein the U-shaped opening of the U-shaped mounting bracket (6) faces rearward and is horizontally disposed at the front end of the sorting and pushing cylinder, wherein a cylinder shaft (7) is disposed in the sorting and pushing cylinder, and a fixing plate fixing flange (11) is disposed at the front end of the cylinder shaft (7), wherein a pushing block fixing plate (10) is fixed to the front end of the fixing plate fixing flange (11) by screws, and a chip pushing block (9) is disposed at the bottom front end of the pushing block fixing plate (10), characterized in that: The chip push block (9) is provided with an elastic protective push device (8) at its front end; The elastic protective push device (8) includes a bracket mounting piece (13) and a strip bracket (14). The strip bracket (14) is horizontally attached to the front outer wall of the chip push block (9), and the strip bracket (14) is flush with the bottom outer wall of the chip push block (9). The left and right sides of the center of the rear outer wall of the strip bracket (14) are fixed with bracket mounting pieces (13). The two bracket mounting pieces (13) are respectively attached to the left and right outer walls of the chip push block (9), and the two bracket mounting pieces (13) are fixedly connected to the chip push block (9) by screws.
2. The semiconductor chip automatic sorting and pushing mechanism according to claim 1, characterized in that: The elastic protective push device (8) also includes a metal connecting block A (12), a metal connecting block B (16) and a T-shaped disassembly slot (19). The metal connecting block A (12) and the metal connecting block B (16) are fixed at the left and right ends of the strip bracket (14) and at the front outer wall respectively. The metal connecting block A (12) and the metal connecting block B (16) are flush with the bottom outer wall of the strip bracket (14). The metal connecting block A (12) and the metal connecting block B (16) are both vertically penetrated by a T-shaped disassembly slot (19). The two T-shaped disassembly slots (19) are also open at one end facing the center of the strip bracket (14).
3. The semiconductor chip automatic sorting and pushing mechanism according to claim 2, characterized in that: The elastic protective push device (8) further includes a strip-shaped elastic push piece (15), a T-shaped disassembly and fixing block (17), and a metal fixing top piece (18). There are two T-shaped disassembly and fixing blocks (17). The two T-shaped disassembly and fixing blocks (17) are respectively inserted into the T-shaped disassembly and fixing slots (19) inside the metal connecting block A (12) and the metal connecting block B (16). The strip-shaped elastic push piece (15) is connected between the two T-shaped disassembly and fixing blocks (17). The top of each of the two T-shaped disassembly and fixing blocks (17) is provided with a metal fixing top piece (18).
4. The semiconductor chip automatic sorting and pushing mechanism according to claim 3, characterized in that: After the T-shaped disassembly and fixing block (17) is fully inserted into the T-shaped disassembly and fixing slot (19) from top to bottom, the metal fixing top plate (18) is attached to the top outer wall of the metal connecting block A (12) and the metal connecting block B (16) so that the bottom outer wall of the T-shaped disassembly and fixing block (17) and the strip elastic push plate (15) is flush with the bottom outer wall of the strip bracket (14) and the chip push block (9). The metal fixing top plate (18) is provided with fixing screws near the four corners, and the metal fixing top plate (18) is fixedly connected to the metal connecting block A (12) and the metal connecting block B (16) by fixing screws.
5. The semiconductor chip automatic sorting and pushing mechanism according to claim 4, characterized in that: The strip-shaped elastic push piece (15) is located laterally in front of the strip-shaped bracket (14) and is parallel to the strip-shaped bracket (14). After the two T-shaped disassembly and assembly fixing blocks (17) are respectively inserted into the two T-shaped disassembly and assembly slots (19), the strip-shaped elastic push piece (15) is in a taut state.
6. The semiconductor chip automatic sorting and pushing mechanism according to claim 1, characterized in that: The sorting and pushing cylinder includes a front cover (1), a cylinder body (2), a metal reinforcing connecting rod (3), a rear cover (4), and a pressure supply port (5). The cylinder body (2) is provided with a front cover (1) and a rear cover (4) at its front and rear ends, respectively, and the front cover (1) and the rear cover (4) are fixedly connected with metal reinforcing connecting rods (3) near the four corners.
7. The semiconductor chip automatic sorting and pushing mechanism according to claim 6, characterized in that: The rear end cover (4) has a pressure air hole (5) inside the center of the top, and the pressure air hole (5) is connected to the inside of the cylinder body (2). The pressure air hole (5) is connected to the external pressure supply pipe through a connector.
8. The semiconductor chip automatic sorting and pushing mechanism according to claim 7, characterized in that: The U-shaped mounting bracket (6) has a pre-drilled hole at its center, and a protective guide sleeve is provided in the hole. The front end of the cylinder shaft (7) passes through the protective guide sleeve, and the cylinder shaft (7) can move back and forth in the protective guide sleeve. The rear end of the cylinder shaft (7) is fixedly connected to the plunger inside the cylinder body (2).