Slicing clamp for copper-clad ceramic substrate

Abstract

The utility model discloses a fragmentation clamp of copper clad ceramic substrate, including mounting seat and clamping mechanism, mounting seat: its bottom wall middle part is equipped with evenly distributed chute, clamping mechanism: clamping piece, extrusion block, notch, top ring, connecting rod and drive assembly, and the clamping piece is connected between every two horizontal adjacent chute in sliding mode, and the extrusion block is equipped with the notch, the top ring, connecting rod and drive assembly. The fragmentation clamp of the copper-clad ceramic substrate is provided with the clamping mechanism, the clamping pieces are extruded by the extrusion blocks moving inwards, fragmentation clamping of the copper-clad ceramic substrate is achieved, the top ring moves along with the extrusion blocks when the extrusion blocks move, the clamping pieces are clamped, and the clamping pieces are clamped by the clamping mechanism. The left part, the right part and the middle part of the clamping piece can be stressed at the same time, so that the stress distribution of the clamping piece is more uniform, and the conditions that the edge of the copper-clad ceramic substrate is cracked, a copper layer is stripped and a ceramic layer is slightly cracked due to non-uniform stress are avoided.

Description

Technical Field

[0001] This utility model relates to the field of copper-clad ceramic substrate production technology, specifically a slitting fixture for copper-clad ceramic substrates. Background Technology

[0002] Copper-clad ceramic substrates (CCLs) are high-performance electronic packaging materials made by laminating copper foil onto the surface of a ceramic substrate (such as alumina or aluminum nitride). They combine the high thermal conductivity, insulation, and high-temperature resistance of ceramics with the excellent electrical conductivity of copper. Core processes include direct copper cladding (DBC) or thin-film copper cladding (DPC) technologies, which create a stable bond between the copper layer and the ceramic substrate. These substrates are suitable for high-power semiconductor devices, LED lighting, new energy vehicles, aerospace, and other fields, performing particularly well in scenarios requiring efficient heat dissipation and stable circuit connections. They also effectively match the thermal expansion coefficients of materials, improving device reliability. In the production process of CCLs, the substrate is typically metallized and has its circuitry fabricated as a single board. It then needs to be diced into smaller pieces using mechanical or laser cutting methods to meet device packaging requirements. These diced pieces require clamping and transport, necessitating the use of CCL dicing fixtures. Existing slitting fixtures for copper-clad ceramic substrates (CCLs) mostly achieve slitting and clamping of CCLs through three methods: hydraulic, pneumatic, and mechanical extrusion. Among these, mechanical extrusion is particularly common due to its low failure rate. It achieves slitting and clamping of CCLs by moving the clamping pieces with limiting blocks on one or both sides, making the clamping pieces contact the reference surface of the CCL. Traditional slitting fixtures for CCLs mostly use single-sided or double-sided extrusion and limiting, resulting in high stress in the limiting areas and low stress in the unlimited areas. Uneven stress can lead to edge cracking, copper layer peeling, and micro-cracks in the ceramic layer of the CCL. To address this, we propose a slitting fixture for CCLs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a slitting fixture for copper-clad ceramic substrates. It is equipped with a clamping mechanism, which achieves slitting clamping of copper-clad ceramic substrates by pressing the clamping pieces by moving the pressing block inward. When the pressing block moves, the top ring also moves accordingly, so that the left, right and middle parts of the clamping pieces are simultaneously stressed, thereby making the stress distribution of the clamping pieces more uniform. This avoids the occurrence of edge cracking, copper layer peeling and micro-cracks in the ceramic layer of the copper-clad ceramic substrate caused by uneven stress, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a slitting fixture for copper-clad ceramic substrates, comprising a mounting base and a clamping mechanism;

[0005] Mounting base: Its bottom wall has evenly distributed grooves in the middle;

[0006] Clamping mechanism: It includes clamping pieces, pressing blocks, notches, top rings, connecting rods, and a drive assembly. Clamping pieces are slidably connected between two horizontally adjacent slides. The pressing blocks are slidably connected to the left and right sides of the bottom wall of the mounting base. Notches are evenly opened on the side of the pressing blocks near the middle of the mounting base. The inner walls of the notches are fitted with the horizontally adjacent clamping pieces. Two clamping pieces in the horizontally adjacent slides form a group. A movable top ring is provided between two adjacent groups of clamping pieces. The top ring and the pressing block are rotatably connected by a connecting rod, providing a basis for the segmented clamping of the copper-clad ceramic substrate. The drive assembly is located in the middle of the bottom wall of the mounting base and is equipped with a clamping mechanism. The segmented clamping of the copper-clad ceramic substrate is achieved by pressing the clamping pieces by moving the pressing blocks inward. When the pressing blocks move, the top ring also moves, which can make the left, right, and middle parts of the clamping pieces bear force at the same time, so that the stress distribution of the clamping pieces is more uniform, avoiding the occurrence of edge cracking, copper layer peeling, and micro-cracks in the ceramic layer caused by uneven stress.

[0007] Furthermore, the clamping mechanism also includes a hexagonal prism, which is disposed in the middle of the interior of the mounting base. A through hole is provided in the middle of the interior of the clamping piece. The inner wall of the top ring and the through hole are slidably connected to the outer surface of the hexagonal prism, providing a limiting effect for the movement of the clamping piece and the top ring.

[0008] Furthermore, the driving assembly includes a limiting plate, a limiting groove, and limiting posts. The limiting plate is rotatably connected to the middle of the bottom wall of the mounting base. The limiting grooves are respectively opened on the left and right sides inside the limiting plate. The limiting posts are all set in the middle of the lower end of the extrusion block. The outer surface of the limiting posts is slidably connected to the inner wall of the vertically adjacent limiting groove, providing a basis for the movement of the extrusion block.

[0009] Furthermore, the drive assembly also includes a motor, which is located at the lower center of the mounting base. The input end of the motor is electrically connected to the output end of the microcontroller, and the upper end of the motor's output shaft is fixedly connected to the lower end of the limiting plate, providing stable drive for the segmentation and clamping of the copper-clad ceramic substrate.

[0010] Furthermore, it also includes guide posts and return springs. The guide posts are all set inside the slide groove. A partition is provided in the middle of the slide groove. The partition is fixedly connected to the middle of the outer surface of the vertically adjacent guide post. The lower end of the clamp is slidably connected to the outer surface of the vertically adjacent guide post. A return spring is provided between the partition and the clamp located inside the same slide groove. The return spring is sleeved on the outer surface of the guide post to provide a stable return effect for the clamp.

[0011] Furthermore, it also includes a cover plate and a silicone pad. The cover plate is located in the middle of the interior of the mounting base, and the silicone pad is evenly distributed in the middle of the interior of the cover plate. The upper ends of the relative inner sides of the two clamping pieces inside the two horizontally adjacent sliding grooves are provided with silicone pads, which provide buffering and limiting effects for the segmented clamping of the copper-clad ceramic substrate.

[0012] Furthermore, it also includes a microcontroller, which is located on the lower front side of the mounting base. The input terminal of the microcontroller is electrically connected to an external power supply to provide control for the slicing and clamping of the copper-clad ceramic substrate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This copper-clad ceramic substrate slitting fixture has the following advantages:

[0014] The copper-clad ceramic substrate is clamped in sections by two pressing blocks moving inward synchronously to press the clamping pieces. With the pressing of the connecting rod and the top ring, the pressing blocks press the left and right sides of the clamping pieces, and the top ring presses the middle area of ​​the clamping pieces. The left, right and middle areas of the clamping pieces are pressed at the same time, which makes the stress distribution of the clamping pieces more uniform and avoids the occurrence of edge cracking, copper layer peeling and micro-cracks in the ceramic layer caused by uneven stress. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the clamping mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the extrusion block of this utility model;

[0018] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model;

[0019] Figure 5 This is a schematic diagram of the limiting disc structure of this utility model.

[0020] In the diagram: 1 Mounting base, 2 Slide groove, 3 Clamping mechanism, 31 Clamping plate, 32 Extrusion block, 33 Notch, 34 Top ring, 35 Connecting rod, 36 Hexagonal prism, 37 Drive assembly, 371 Limiting plate, 372 Limiting groove, 373 Limiting post, 374 Motor, 38 Guide post, 39 Return spring, 4 Cover plate, 5 Silicone pad one, 6 Silicone pad two, 7 Microcontroller. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-5This embodiment provides a technical solution: a slitting fixture for copper-clad ceramic substrates, including a mounting base 1 and a clamping mechanism 3;

[0023] Mounting base 1: It has evenly distributed sliding grooves 2 in the middle of its bottom wall, and also includes a microcontroller 7. The microcontroller 7 is located on the lower front side of the mounting base 1. The input terminal of the microcontroller 7 is electrically connected to an external power supply to provide control for the segmentation and clamping of the copper-clad ceramic substrate.

[0024] Clamping mechanism 3: It includes clamping plates 31, pressing blocks 32, notches 33, top rings 34, connecting rods 35, and drive components 37. Clamping plates 31 are slidably connected between two adjacent sliding grooves 2. Stackable dust covers are provided between two adjacent clamping plates 31. When the clamping plates 31 move, the dust covers will extend and retract with the movement of the clamping plates 31 to prevent debris from entering the clamp. The pressing blocks 32 are slidably connected to the left and right sides of the bottom wall of the mounting base 1. The notches 33 are evenly opened on the side of the pressing blocks 32 near the middle of the mounting base 1. The front and rear side walls of the notches 33 are both inclined. The inner walls of the notches 33 are all fitted with the adjacent clamping plates 31. The inner walls of the notches 33 are all in contact with the edges of the adjacent clamping plates 31. The clamping mechanism 3 consists of two clamping pieces 31 forming a group. A movable top ring 34 is provided between each pair of adjacent clamping pieces 31. The end of the top ring 34 near the notch 33 is in contact with the vertically adjacent clamping piece 31. A connecting rod 35 is rotatably connected between the top ring 34 and the pressing block 32, providing a basis for the segmented clamping of the copper-clad ceramic substrate. The clamping mechanism 3 also includes a hexagonal prism 36, which is located in the center of the mounting base 1. A through hole is opened in the center of the clamping piece 31. The top ring 34 and the inner wall of the through hole are slidably connected to the outer surface of the hexagonal prism 36, providing a limiting effect for the movement of the clamping piece 31 and the top ring 34. The driving assembly 37 is located in the middle of the bottom wall of the mounting base 1. The driving assembly 37 includes a limiting plate 371, a limiting groove 372, and a limiting post 373. The positioning plate 371 is rotatably connected to the middle of the bottom wall of the mounting base 1. Limiting grooves 372 are respectively formed on the left and right sides inside the positioning plate 371. The arc-shaped grooves of the limiting grooves 372 and the limiting posts 373 are all located at the lower middle of the extrusion block 32. The outer surfaces of the limiting posts 373 are slidably connected to the inner walls of the vertically adjacent limiting grooves 372. The limiting grooves 372 are all deflected inwards about the end closest to the limiting post 373. The distance between the end of the limiting groove 372 near the limiting post 373 and the outer surface of the positioning plate 371 is less than the distance between the end of the limiting groove 372 away from the limiting post 373 and the outer surface of the positioning plate 371, providing a basis for the movement of the extrusion block 32. The drive assembly 37 also includes a motor 374, which is located at the lower middle of the mounting base 1. The input terminal of motor 374 is electrically connected to the output terminal of microcontroller 7. The upper end of the output shaft of motor 374 is fixedly connected to the lower end of limit plate 371, providing stable drive for the segmentation and clamping of copper-clad ceramic substrates. It also includes guide posts 38 and return springs 39. The guide posts 38 are all located inside the slide groove 2. A partition is provided in the middle of each slide groove 2. The partition is fixedly connected to the middle of the outer surface of the vertically adjacent guide post 38. The lower end of the clamping piece 31 is slidably connected to the outer surface of the vertically adjacent guide post 38. A return spring 39 is provided between the partition and the clamping piece 31 located within the same slide groove 2. The return spring 39 is sleeved on the outer surface of the guide post 38, providing a stable reset effect for the clamping piece 31. It also includes a cover plate 4 and a silicone pad 5.Cover plate 4 is located in the center of the mounting base 1. Silicone pad 5 is evenly distributed in the center of cover plate 4. Silicone pad 6 is provided on the upper ends of the opposite inner surfaces of the two clamping pieces 31 inside the two laterally adjacent sliding grooves 2, providing buffering and limiting effects for the segmented clamping of the copper-clad ceramic substrate. A clamping mechanism 3 is provided, which clamps the copper-clad ceramic substrate by pressing the clamping pieces 31 inward with the pressing block 32. When the pressing block 32 moves, the top ring 34 also moves accordingly, allowing the left, right, and center parts of the clamping pieces 31 to be stressed simultaneously. This results in a more uniform stress distribution on the clamping pieces 31, preventing edge chipping, copper layer peeling, and micro-cracks in the ceramic layer caused by uneven stress.

[0025] The working principle of the copper-clad ceramic substrate segmentation clamp provided by this utility model is as follows: When performing segmentation clamping of the copper-clad ceramic substrate, the mounting base 1 is connected to the robotic arm through external bolts and mounting holes. The microcontroller 7 controls the motor 374 to operate. The output shaft of the motor 374 drives the limiting plate 371 to rotate, and the limiting groove 372 also moves accordingly. The limiting groove 372 squeezes the limiting post 373, causing the two squeezing blocks 32 to move inward synchronously. As the squeezing blocks 32 move, the inner wall of the notch 33 squeezes the left and right sides of the clamping piece 31. With the guidance of the guide post 38, the two clamping pieces 31 in the same group move inward synchronously. The return spring 39 is compressed by force, forming a squeezing effect on the left and right sides of the clamping piece 31 until the silicone pad 6 contacts the surface of the copper-clad ceramic substrate. At the same time, as the squeezing blocks 32 move inward, the inner wall of the notch 33 squeezes the left and right sides of the clamping piece 31 to form a squeezing effect on the left and right sides of the clamping piece 31. The pressing block 32 presses the connecting rod 35, causing the end of the connecting rod 35 that is vertically adjacent to the top ring 34 to deflect outward. With the limiting of the hexagonal prism 36, the two top rings 34 also move synchronously in the direction of the clamping piece 31. The top rings 34 are close to the clamping piece 31, forming a pressing effect on the middle area of ​​the clamping piece 31. At this time, the left, right and middle areas of the clamping piece 31 are simultaneously compressed, making the stress distribution of the clamping piece 31 more uniform. This avoids the occurrence of edge cracking, copper layer peeling and micro-cracks in the ceramic layer caused by uneven stress. When the copper-clad ceramic substrate is released, the motor 374 drives the limiting plate 371 to reverse, and the pressing block 32 and the top ring 34 return to their original positions synchronously. The clamping piece 31 is not under force, and the return spring 39 expands without force, driving the clamping piece 31 back to its original position and quickly releasing the copper-ceramic substrate.

[0026] It is worth noting that the microcontroller 7 disclosed in the above embodiments is an STM32F103RCT6 microcontroller, and the motor 374 is a Z2D15-24A-13S motor. The microcontroller 7 controls the operation of the motor 374 using methods commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dicing chuck for a copper clad ceramic substrate, characterized by: Includes a mounting base (1) and a clamping mechanism (3); Mounting base (1): Its bottom wall has evenly distributed grooves (2) in the middle; Clamping mechanism (3): It includes clamping pieces (31), extrusion blocks (32), notches (33), top rings (34), connecting rods (35) and drive components (37). Clamping pieces (31) are slidably connected between two adjacent sliding grooves (2). Extrusion blocks (32) are slidably connected to the left and right sides of the bottom wall of the mounting base (1). Notches (33) are evenly opened on the side of the extrusion block (32) near the middle of the mounting base (1). The inner wall of the notches (33) is fitted with the adjacent clamping pieces (31). Two clamping pieces (31) in the adjacent sliding grooves (2) are a group. A movable top ring (34) is provided between two adjacent groups of clamping pieces (31). A connecting rod (35) is rotatably connected between the top ring (34) and the extrusion block (32). The drive components (37) are located in the middle of the bottom wall of the mounting base (1).

2. The copper clad ceramic substrate dicing jig according to claim 1, wherein: It also includes a microcontroller (7), which is located on the lower front side of the mounting base (1), and the input terminal of the microcontroller (7) is electrically connected to an external power supply.

3. The copper clad ceramic substrate dicing jig of claim 1, wherein: The clamping mechanism (3) also includes a hexagonal prism (36), which is located in the middle of the mounting base (1). A through hole is provided in the middle of the clamping piece (31), and the top ring (34) and the inner wall of the through hole are slidably connected to the outer surface of the hexagonal prism (36).

4. The copper clad ceramic substrate dicing jig of claim 2, wherein: The drive assembly (37) includes a limiting plate (371), a limiting groove (372), and a limiting post (373). The limiting plate (371) is rotatably connected to the middle of the bottom wall of the mounting base (1). The limiting groove (372) is respectively opened on the left and right sides inside the limiting plate (371). The limiting posts (373) are all set in the middle of the lower end of the extrusion block (32). The outer surface of the limiting post (373) is slidably connected to the inner wall of the vertically adjacent limiting groove (372).

5. The copper clad ceramic substrate dicing jig of claim 4, wherein: The drive assembly (37) also includes a motor (374), which is located at the lower middle part of the mounting base (1). The input end of the motor (374) is electrically connected to the output end of the microcontroller (7), and the upper end of the output shaft of the motor (374) is fixedly connected to the lower end of the limiting plate (371).

6. The copper clad ceramic substrate dicing jig of claim 1, wherein: It also includes guide posts (38) and return springs (39). The guide posts (38) are all located inside the slide groove (2). Each slide groove (2) has a partition in the middle. The partition is fixedly connected to the middle of the outer surface of the vertically adjacent guide post (38). The lower end of the clamp (31) is slidably connected to the outer surface of the vertically adjacent guide post (38). Each partition and clamp (31) located inside the same slide groove (2) is provided with a return spring (39). The return springs (39) are all sleeved on the outer surface of the guide post (38).

7. The copper clad ceramic substrate dicing jig of claim 1, wherein: It also includes a cover plate (4) and a silicone pad (5). The cover plate (4) is located in the middle of the interior of the mounting base (1). The silicone pad (5) is evenly distributed in the middle of the interior of the cover plate (4). The upper ends of the relative inner sides of the two clips (31) inside the two horizontally adjacent slide grooves (2) are provided with silicone pads (6).

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