An automatic film expansion frame structure for a die bonder

Abstract

This utility model relates to the field of die bonder technology, and in particular to an automatic film expansion die frame structure for a die bonder, including a mounting plate and a synchronous belt. Multiple first ball screws are rotatably connected to the top of the mounting plate. First synchronous pulleys are fixedly connected to the ends of the first ball screws. Two limiting rings are fixedly connected to the ends of the first ball screws. The first synchronous pulleys are located between the two limiting rings. Multiple rotating shafts are fixedly connected between the two limiting rings. Positioning rollers are rotatably connected to the outer walls of each rotating shaft. The multiple first synchronous pulleys are connected via a synchronous belt drive. In this utility model, the positioning rollers between the two limiting rings roll into contact with the synchronous belt, providing lateral support and limiting its lateral deviation. The limiting rings also prevent axial movement of the synchronous belt, avoiding detachment and ensuring that the synchronous belt always runs on a preset track. This reduces transmission lag caused by synchronous belt slack, keeps the film expansion action synchronized with chip positioning, and prevents chip misalignment during bonding.

Description

Technical Field

[0001] This utility model relates to the field of die bonder technology, and more specifically, to an automatic film expansion crystal frame structure for a die bonder. Background Technology

[0002] A die bonder, also known as a die attacher, is a core piece of equipment in semiconductor packaging processes. It is used to precisely pick up chips from wafers and fix them at designated positions on substrates or lead frames, achieving mechanical connection and electrical conduction between the chip and the substrate. In the chip packaging process of a die bonder, the stable transmission of the automatic film expansion frame structure is crucial to ensuring precise chip positioning. The tension and transmission accuracy of its synchronous belt directly affect the film expansion effect and the quality of die bonding.

[0003] For example, in the Chinese patent with announcement number CN209912891U, most die bonders use a synchronous belt and synchronous pulley transmission method for the expansion frame. However, the synchronous belt is prone to loosening or shifting due to tension fluctuations during long-term operation. The loosening of the synchronous belt will cause transmission lag, making the expansion action and chip positioning asynchronous, resulting in chip misalignment. Utility Model Content

[0004] Based on the aforementioned technical problems regarding the synchronous belt of the traditional die bonder's film expansion frame being prone to loosening or shifting due to tension fluctuations during long-term operation, resulting in transmission lag, asynchronous film expansion and chip positioning, and causing chip misalignment, this utility model proposes an automatic film expansion frame structure for the die bonder.

[0005] This utility model proposes an automatic film expansion crystal frame structure for a die bonder, including a mounting plate and a synchronous belt. Multiple first ball screws are rotatably connected to the top of the mounting plate. A first synchronous wheel is fixedly connected to the end of each first ball screw. Two limiting rings are fixedly connected to the end of each first ball screw. The first synchronous wheel is located between the two limiting rings. Multiple rotating shafts are fixedly connected between the two limiting rings. Positioning rollers are rotatably connected to the outer wall of each rotating shaft. The multiple first synchronous wheels are connected via a synchronous belt drive, and the outer wall of the positioning rollers makes rolling contact with the synchronous belt.

[0006] Preferably, the top of the mounting plate has a mounting groove, and two sliding rods are fixedly connected to the inner wall of the mounting groove. Each sliding rod has a slider slidably connected to its outer wall.

[0007] Preferably, a frame is fixedly connected between the two sliders, and a first servo motor is fixedly connected to the inner wall of the frame.

[0008] Preferably, a second synchronous pulley is fixedly connected to the output end of the first servo motor, and the second synchronous pulley meshes with a synchronous belt for transmission.

[0009] Preferably, the output end of the first servo motor is fixedly connected to two limiting sleeves, and the synchronous belt is located between the two limiting sleeves.

[0010] Preferably, a movable block is fixedly connected to the bottom of the frame, and two shaft support plates are fixedly connected to the bottom of the mounting plate.

[0011] Preferably, a second ball screw is rotatably connected between the two shaft support plates, and the ball nut on the second ball screw is fixedly connected to the moving block.

[0012] Preferably, a second servo motor is fixedly connected to the bottom of the mounting plate, and the output end of the second servo motor is fixedly connected to a second ball screw.

[0013] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0014] 1. The positioning roller between the two limiting rings makes rolling contact with the timing belt, providing lateral support to the timing belt and limiting its left and right deviation; the limiting rings block the axial movement of the timing belt to prevent it from falling off, ensuring that the timing belt always runs on the preset track, reducing transmission lag caused by the loosening of the timing belt, keeping the film expansion action synchronized with the chip positioning, and preventing misalignment of the chip bonding.

[0015] 2. When it is necessary to adjust the tension of the timing belt, the second servo motor drives the second ball screw to rotate, which in turn moves the moving block and the frame along the slide bar, changing the distance between the second timing pulley and the first timing pulley, thereby adjusting the tension of the timing belt and ensuring stable transmission.

[0016] 3. The limiting sleeves are located on both sides of the synchronous belt, further restricting the lateral offset of the synchronous belt. Together with the positioning rollers, they form multiple positioning, which can maintain the transmission stability of the synchronous belt even during long-term operation and reduce transmission lag caused by offset. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the mounting structure of the frame of this utility model;

[0019] Figure 3 This is a partial structural schematic diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the installation structure of the positioning roller of this utility model.

[0021] In the diagram: 1. Mounting plate; 2. First ball screw; 3. Limiting ring; 4. Rotating shaft; 5. Positioning roller; 6. Synchronous belt; 7. First synchronous pulley; 8. Mounting groove; 9. Slide bar; 10. Frame; 11. First servo motor; 12. Limiting sleeve; 13. Second synchronous pulley; 14. Slider; 15. Second ball screw; 16. Shaft support plate; 17. Second servo motor; 18. Moving block. Detailed Implementation

[0022] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. In this utility model, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, "fixed connection" can mean fixed installation, detachable connection, or integral; it can mean mechanical connection or electrical connection; it can mean direct connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] like Figures 1-4 As shown, an automatic film expansion frame structure for a die bonder includes a mounting plate 1 and a synchronous belt 6. Multiple first ball screws 2 are rotatably connected to the top of the mounting plate 1. First synchronous pulleys 7 are fixedly connected to the ends of the first ball screws 2. Two limiting rings 3 are fixedly connected to the ends of the first ball screws 2. The first synchronous pulleys 7 are located between the two limiting rings 3. Multiple rotating shafts 4 are fixedly connected between the two limiting rings 3. Positioning rollers 5 are rotatably connected to the outer walls of the rotating shafts 4. The multiple first synchronous pulleys 7 are connected by a synchronous belt 6. The outer walls of the positioning rollers 5 are in rolling contact with the synchronous belt 6.

[0024] The timing belt 6 is bidirectionally constrained by the limiting ring 3 and the positioning roller 5. The rolling support of the positioning roller 5 reduces the timing belt offset, and the limiting ring 3 restricts axial displacement, which solves the problem of easy loosening or offset of traditional timing belts, ensures that the film expansion action is synchronized with the chip positioning, and avoids chip pasting misalignment.

[0025] like Figure 2 As shown, the top of the mounting plate 1 has a mounting groove 8, and two sliding rods 9 are fixedly connected to the inner wall of the mounting groove 8. Sliding sliders 14 are slidably connected to the outer wall of each sliding rod 9.

[0026] The slide bar 9 in the mounting groove 8 provides guidance for the slider 14, making the movement of the frame 10 smoother, ensuring the meshing accuracy of the second synchronous pulley 13 and the synchronous belt 6, and indirectly improving the transmission stability.

[0027] like Figure 2 As shown, a frame 10 is fixedly connected between the two sliders 14, and a first servo motor 11 is fixedly connected to the inner wall of the frame 10.

[0028] The frame 10 fixes the slider 14 and installs the first servo motor 11, integrating the transmission structure of the motor and the synchronous belt 6, reducing component swaying, and facilitating overall movement and tension adjustment.

[0029] like Figure 2 As shown, the output end of the first servo motor 11 is fixedly connected to the second synchronous pulley 13, and the second synchronous pulley 13 meshes with the synchronous belt 6 for transmission.

[0030] like Figure 2 As shown, the output end of the first servo motor 11 is fixedly connected to two limit sleeves 12, and the synchronous belt 6 is located between the two limit sleeves 12.

[0031] The limiting sleeve 12 is located on both sides of the synchronous belt 6, further restricting the lateral offset of the synchronous belt. Together with the positioning roller 5, it forms multiple positioning, which can maintain the transmission stability of the synchronous belt even during long-term operation and reduce transmission lag caused by offset.

[0032] like Figure 2 As shown, a movable block 18 is fixedly connected to the bottom of the frame 10, and two shaft support plates 16 are fixedly connected to the bottom of the mounting plate 1.

[0033] like Figure 2 As shown, a second ball screw 15 is rotatably connected between the two shaft support plates 16, and the ball nut on the second ball screw 15 is fixedly connected to the moving block 18.

[0034] The movable block 18 connects the frame 10 and the second ball screw 15, and the shaft support plate 16 provides support for the second ball screw 15, making the tension adjustment structure stable and reliable, and ensuring the accuracy of the tension adjustment of the synchronous belt 6.

[0035] like Figure 2 As shown, a second servo motor 17 is fixedly connected to the bottom of the mounting plate 1, and the output end of the second servo motor 17 is fixedly connected to the second ball screw 15.

[0036] The second ball screw 15 drives the frame 10 to move via the moving block 18. It has high transmission accuracy and can achieve micro-adjustment of the tension of the synchronous belt 6, avoiding excessive tension that would cause wear of the synchronous belt or insufficient tension that would cause slack.

[0037] When the automatic film expansion frame structure of the die bonder is working, the first servo motor 11 drives the second synchronous wheel 13 to rotate, which drives multiple first synchronous wheels 7 and the first ball screw 2 to rotate synchronously through the synchronous belt 6, thereby realizing the transmission of the film expansion action.

[0038] During the operation of the synchronous belt 6, the positioning roller 5 between the two limiting rings 3 rolls in contact with the synchronous belt 6, providing lateral support to the synchronous belt 6 and preventing it from shifting; the limiting rings 3 restrict the axial displacement of the synchronous belt 6 to prevent it from falling off.

[0039] When it is necessary to adjust the tension of the timing belt 6, the second servo motor 17 drives the second ball screw 15 to rotate, which in turn moves the moving block 18 and the frame 10 along the slide bar 9, changing the distance between the second timing pulley 13 and the first timing pulley 7, thereby adjusting the tension of the timing belt 6 and ensuring stable transmission.

[0040] The limiting sleeve 12 at the output end of the first servo motor 11 further constrains the position of the synchronous belt 6 to prevent it from deviating during transmission.

[0041] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A structure of automatic expanding film die frame of die bonder, comprising a mounting plate (1) and a synchronous belt (6), characterized in that: The mounting plate (1) is rotatably connected to a plurality of first ball screws (2), and a first synchronous wheel (7) is fixedly connected to the end of the first ball screw (2). Two limiting rings (3) are fixedly connected to the end of the first ball screw (2). The first synchronous wheel (7) is located between the two limiting rings (3). A plurality of rotating shafts (4) are fixedly connected between the two limiting rings (3). Positioning rollers (5) are rotatably connected to the outer wall of each rotating shaft (4). The plurality of first synchronous wheels (7) are connected by a synchronous belt (6). The outer wall of the positioning roller (5) is in rolling contact with the synchronous belt (6).

2. The automatic die expansion frame structure of the die bonder of claim 1, wherein: The mounting plate (1) has a mounting groove (8) on its top. Two sliding rods (9) are fixedly connected to the inner wall of the mounting groove (8), and sliders (14) are slidably connected to the outer wall of each sliding rod (9). 3.The automatic die expanding structure of a die bonder according to claim 2, wherein: A frame (10) is fixedly connected between the two sliders (14), and a first servo motor (11) is fixedly connected to the inner wall of the frame (10).

4. The automatic die bonder according to claim 3, wherein: The output end of the first servo motor (11) is fixedly connected to a second synchronous pulley (13), and the second synchronous pulley (13) meshes with the synchronous belt (6) for transmission.

5. The automatic die bonder according to claim 4, wherein: The output end of the first servo motor (11) is fixedly connected to two limiting sleeves (12), and the synchronous belt (6) is located between the two limiting sleeves (12).

6. The automatic film expansion frame structure for a die bonder according to claim 5, characterized in that: The bottom of the frame (10) is fixedly connected to a movable block (18), and the bottom of the mounting plate (1) is fixedly connected to two shaft support plates (16).

7. The automatic film expansion frame structure for a die bonder according to claim 6, characterized in that: A second ball screw (15) is rotatably connected between the two shaft support plates (16), and the ball nut on the second ball screw (15) is fixedly connected to the moving block (18).

8. The automatic film expansion frame structure for a die bonder according to claim 7, characterized in that: The bottom of the mounting plate (1) is fixedly connected to a second servo motor (17), and the output end of the second servo motor (17) is fixedly connected to a second ball screw (15).

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