Fastening device for CQFP shell in packaging process

Abstract

The utility model belongs to the technical field of integrated circuit packaging, and particularly relates to a fastening device for a CQFP shell in the packaging process. Comprising a main objective table and a detachable positioning frame. Wherein the detachable positioning frame is installed on the main objective table and connected through a plurality of positioning adsorption structures, a plurality of positioning grooves used for installing CQFP shells are formed in the detachable positioning frame in an array mode, and the positioning adsorption structures are located in the positioning grooves respectively and adsorb and fix the CQFP shells; the positioning adsorption structure comprises a bearing boss arranged on the front face of the main objective table and a combination hole formed in the positioning groove of the detachable positioning frame, the bearing boss is embedded in the combination hole, and an air guide hole penetrating through the main objective table and an adsorption groove located in the end of the air guide hole are formed in the center of the bearing boss. The CQFP shell fixing device is specially used for fixing a CQFP shell, the fixing position is accurate, automatic equipment identification is facilitated, the switching process of materials on different fastening devices is omitted, time is saved, and efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of integrated circuit packaging technology, and specifically relates to a fastening device for CQFP housings during the packaging process. Background Technology

[0002] CQFP (Ceramic QFlap) housings are a commonly used type of ceramic housing, primarily used for high-reliability packaged integrated circuits. The integrated circuit packaging process generally includes several typical steps: wafer dicing, dispensing, die bonding, bonding, and sealing. Dispensing, die bonding, and bonding all require securing and precisely positioning the integrated circuit housing.

[0003] In traditional packaging processes, because the structures of the materials fixed by the equipment used in each step are different, unique fastening devices need to be customized for each process to accurately position the casing. If each piece of equipment has its own separately designed and manufactured fastening device, materials will need to be frequently changed between different types of fastening devices during process flow, resulting in low work efficiency. If a fastening device that is compatible with different equipment in the same sequence is designed, the loading and unloading time can be eliminated, thus improving efficiency. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a fastening device for CQFP housings during the packaging process, thereby solving the problems of low work efficiency and high production costs caused by the need for customized unique fastening devices for each process in traditional packaging to accurately position the housing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a fastening device for CQFP housings during the packaging process, including a main stage and a detachable positioning frame; wherein the detachable positioning frame is mounted on the main stage and connected by multiple positioning adsorption structures, and the detachable positioning frame has multiple positioning slots for mounting CQFP housings, and the multiple positioning adsorption structures are located in each positioning slot and adsorb and fix the CQFP housings.

[0007] The positioning and adsorption structure includes a bearing boss on the front of the main stage and a combination hole at the bottom of the positioning groove of the detachable positioning frame. The bearing boss passes through the combination hole and is placed in the positioning groove. An air guide hole penetrating the main stage and an adsorption groove located at the end of the air guide hole are provided at the center of the bearing boss.

[0008] The diameter of the air guide hole is 2-3 mm.

[0009] The center of the adsorption tank coincides with the center of the air guide hole; the wall thickness of the adsorption tank is at least 0.2 mm;

[0010] The adsorption tank can be any shape among square, circular, triangular, and rhomboid.

[0011] The supporting boss is a cubic structure with chamfered edges.

[0012] The main platform has height limiting sections on both long sides, and the detachable positioning frame is located between the two height limiting sections; the main platform has chamfered handles on both short sides to facilitate the disassembly of the detachable positioning frame.

[0013] The thickness of the detachable positioning frame is 3-6mm.

[0014] The back of the main stage is provided with a bottom limiting platform embedded in the vacuum suction worktable. The bottom limiting platform is provided with an air guide groove, and the air guide hole is located in the air guide groove. The air guide groove connects the air guide holes in each of the positioning adsorption structures.

[0015] The positioning groove is recessed into the surface of the detachable positioning frame, and the positioning groove is surrounded by a connecting groove for placing the tube shell connecting rib.

[0016] The main platform and the detachable positioning frame are made of any one of copper, aluminum, and steel.

[0017] This utility model has the following beneficial effects and advantages:

[0018] This utility model provides a fastening device for CQFP housings during the packaging process. The fastening device is designed for different equipment stage structures and has a certain degree of versatility; it is also compatible with dispensing, bonding, and assembly equipment.

[0019] This utility model is specifically designed for fixing CQFP housings. The fixing position is precise, which is conducive to the identification of automated equipment. It eliminates the need for material switching between different fastening devices, saving time and improving efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a fastening device for a CQFP housing during the packaging process according to the present invention.

[0021] Figure 2 This is one of the isometric views of the main stage in this utility model;

[0022] Figure 3 This is the second isometric view of the main stage in this utility model;

[0023] Figure 4 This is a structural schematic diagram of the detachable positioning frame in this utility model.

[0024] Among them, 1 is the main stage, 11 is the bearing boss, 111 is the air duct, 112 is the adsorption groove, 113 is the air duct groove, 12 is the height limit part, 13 is the handle chamfer, 14 is the bottom limiting stage, 2 is the detachable positioning frame, 21 is the positioning groove, 22 is the combination hole, and 23 is the connecting groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] See Figures 1 to 4 As shown, this utility model provides a fastening device for CQFP housings during the packaging process, including a main stage 1 and a detachable positioning frame 2; wherein the detachable positioning frame 2 is mounted on the main stage 1 and connected by multiple positioning adsorption structures, and the detachable positioning frame 2 has multiple positioning slots 21 for mounting CQFP housings arrayed on it, and the multiple positioning adsorption structures are respectively located in each positioning slot 21 and support and adsorb and fix the bottom of the CQFP housing.

[0027] In this embodiment of the invention, the positioning and adsorption structure includes a support boss 11 disposed on the front side of the main platform 1 and a combination hole 22 disposed at the bottom of the positioning groove 21 of the detachable positioning frame 2. The support boss 11 passes through the combination hole 22 and is placed in the positioning groove 21. An air guide hole 111 penetrating the main platform 1 and an adsorption groove 112 located at the end of the air guide hole 111 are provided at the center of the support boss 11. The size of the combination hole 2 is nested and matched with the side length of the support boss 11.

[0028] See Figure 2 As shown in the embodiment of this utility model, the upper surface of the main stage 1 is arrayed with multiple main stages 1, and the supporting boss 11 is a cubic structure with chamfered edges. The air guide hole 111 on the supporting boss 11 is connected at its upper end to the adsorption groove 112 and at its lower end directly to the back surface, providing a vacuum suction source. The diameter of the air guide hole 111 is generally between 2-3 mm. In this embodiment, the diameter of the air guide hole 111 is 3 mm. The center of the adsorption groove 112 coincides with the center of the air guide hole 111; the wall thickness of the adsorption groove 112 is at least 0.2 mm. The adsorption groove 112 is used to increase the vacuum contact area and enhance the adsorption force for fixing the CQFP shell. Its shape can be square, circular, triangular, rhomboid, etc. In this embodiment, a circular shape is preferred, with its center overlapping the center of the air guide hole 11. In this embodiment, the diameter of the adsorption groove 112 is set to 4 mm.

[0029] Furthermore, the main platform 1 has height limiting sections 12 on both long sides, and the detachable positioning frame 2 is located between the two height limiting sections 12; the thickness of the detachable positioning frame 2 is 3-6mm, and the top surface area of ​​the main platform 1 between the two height limiting sections 12 is the same as the area of ​​the detachable positioning frame 2. The main platform 1 has chamfered handles 13 on both short sides to facilitate the removal of the detachable positioning frame 2.

[0030] See Figure 3 As shown in the embodiment of this utility model, the back of the main stage 1 is provided with a bottom limiting platform 14 embedded in the vacuum suction stage. The bottom limiting platform 14 is provided with a gas guide groove 113, and the gas guide hole 111 is located in the gas guide groove 113. The gas guide groove 113 connects the gas guide holes 111 in each positioning and adsorption structure. The gas guide groove 113 on the bottom limiting platform 14 is connected to the vacuum hole on the worktable of the dispensing, bonding, and bonding equipment in the packaging process, providing vacuum suction for the main stage 1 and the CQFP shell located on the main stage 1. The vacuum degree is -25mBar to 70mBar. Too small a vacuum will cause the entire main stage 1 or the CQFP shell to move during the process due to lack of fixation. In this embodiment, -50mBar is preferred.

[0031] Furthermore, the bottom limiting stage 14 is a flat plate structure. The bottom limiting stage 14 matches the size of the stage on the worktable of the dispensing, die bonding, and bonding equipment in the packaging process. Its area is consistent with the size of the stage and it has a certain thickness, at least 3 mm, for embedding into the stage with a guard. The flatness of the bottom surface of the bottom limiting stage 14 does not exceed 0.2 to ensure vacuum suction.

[0032] See Figure 4 As shown in the embodiment of this utility model, the positioning groove 21 is recessed on the surface of the detachable positioning frame 2, and the positioning groove 21 is provided with a connecting groove 23 for placing the tube shell connecting rib around its perimeter.

[0033] Specifically, the main stage 1 and the detachable positioning frame 2 are made of any one of copper, aluminum, and steel, with aluminum being the preferred material in this embodiment. In this embodiment, the main stage 1 is equipped with support bosses 11 arranged in a 5*7 array. The upper surface of the support bosses 11 contacts the back of the CQFP tube shell, and their size and area are smaller than the flat ceramic part on the back of the tube shell, with one side being at least 0.5mm smaller. The four sides are chamfered to prevent scratching the shell, with a chamfer of 0.1mm. The height limiting parts 12 on both sides of the main stage 1 are required to ensure that when the CQFP tube shell is placed on the support bosses 11, the height of the plane of the height limiting part 12 is consistent with the height of the marking plane inside the CQFP shell cavity. This ensures that for equipment using a rising extrusion fixing clamp, the focal length of the equipment lens behind the fixing clamp falls on the identification mark inside the CQFP tube shell cavity. This is a special design for equipment using this type of fixing clamp structure.

[0034] This invention provides a fastening device for CQFP housings during the packaging process, where CQFP stands for Quad-QF Flat Ceramic Package. The working principle of this device is as follows:

[0035] Preparation process: Assemble the detachable positioning frame 2 and install the detachable positioning frame 2 on the main stage 1.

[0036] After assembling the detachable positioning frame 2, place the CQFP housing on the support boss 11, with the lower surface of the CQFP housing in contact with the upper surface of the support boss 11, and all CQFP housings facing the same direction.

[0037] Place the main stage 1 on the equipment workbench, turn on the equipment vacuum, run the equipment working program, provide vacuum suction to the adsorption tank 112 through the air guide hole 111 to adsorb the CQFP shell, and after completing the process operation on the CQFP shell, turn off the equipment vacuum and remove the main stage 1.

[0038] Place the main stage 1 on the equipment workbench, and connect the vacuum hole of the workbench to the air guide groove 113 of the main stage after it is placed.

[0039] This invention provides a fastening device for CQFP housings during the packaging process. Designed for different equipment stage structures, it possesses a certain degree of versatility; it is also compatible with dispensing, surface mount, and bonding equipment. This invention is specifically designed for fixing CQFP housings, providing precise positioning, facilitating automated equipment identification, eliminating the need for material switching between different fastening devices, saving time, and improving efficiency.

[0040] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, extensions, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A fastening device for a CQFP housing during the packaging process, characterized in that, It includes a main stage (1) and a detachable positioning frame (2); wherein the detachable positioning frame (2) is installed on the main stage (1) and connected by multiple positioning adsorption structures. The detachable positioning frame (2) has multiple positioning slots (21) for installing the CQFP shell, and the multiple positioning adsorption structures are located in each positioning slot (21) and adsorb and fix the CQFP shell.

2. The fastening device for a CQFP housing during the packaging process according to claim 1, characterized in that, The positioning and adsorption structure includes a bearing boss (11) on the front of the main stage (1) and a combination hole (22) at the bottom of the positioning groove (21) of the detachable positioning frame (2). The bearing boss (11) passes through the combination hole (22) and is placed in the positioning groove (21). The bearing boss (11) has an air guide hole (111) that penetrates the main stage (1) and an adsorption groove (112) located at the end of the air guide hole (111).

3. The fastening device for a CQFP housing during the packaging process according to claim 2, characterized in that, The diameter of the air guide hole (111) is 2-3 mm.

4. The fastening device for a CQFP housing during the packaging process according to claim 3, characterized in that, The center of the adsorption tank (112) coincides with the center of the air guide hole (111); the wall thickness of the adsorption tank (112) is at least 0.2 mm; The adsorption tank (112) can be any shape among square, circular, triangular and rhomboid.

5. The fastening device for a CQFP housing during the packaging process according to claim 2, characterized in that, The supporting boss (11) is a cubic structure with chamfered corners.

6. The fastening device for a CQFP housing during the packaging process according to claim 2, characterized in that, The main platform (1) has height limiting parts (12) on both long sides, and the detachable positioning frame (2) is located between the two height limiting parts (12); the main platform (1) has handle chamfers (13) on both short sides to facilitate the disassembly of the detachable positioning frame (2).

7. The fastening device for a CQFP housing during the packaging process according to claim 6, characterized in that, The thickness of the detachable positioning frame (2) is 3-6mm.

8. The fastening device for a CQFP housing during the packaging process according to claim 2, characterized in that, The back of the main stage (1) is provided with a bottom limiting stage (14) embedded in the vacuum suction stage. The bottom limiting stage (14) is provided with an air guide groove (113). The air guide hole (111) is located in the air guide groove (113). The air guide groove (113) connects the air guide holes (111) in each of the positioning adsorption structures.

9. The fastening device for a CQFP housing during the packaging process according to claim 1, characterized in that, The positioning groove (21) is recessed on the surface of the detachable positioning frame (2), and the positioning groove (21) is provided with a connecting groove (23) around it for placing the tube shell connecting rib.

10. The fastening device for a CQFP housing during the packaging process according to claim 1, characterized in that, The main platform (1) and the detachable positioning frame (2) are made of any one of copper, aluminum and steel.

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