A wedge bonding head apparatus

Abstract

The application relates to the field of special equipment manufacturing for semiconductor devices, in particular to a wedge bonding head device. The wedge bonding head device is applied to lead welding of semiconductor devices and comprises a driving main body, a welding head, a winding wheel and a conveying assembly arranged on the driving main body. An adjusting mechanism for adjusting the tightness of the lead during the conveying process is arranged on the driving main body. The adjusting mechanism is provided with a tensioning wheel. The conveying assembly comprises two conveying wheels arranged on the two sides of the lead and capable of moving close to or away from each other. A linkage assembly is arranged between the adjusting mechanism and the two conveying wheels. The linkage assembly comprises a synchronous structure connecting the two conveying wheels and a connecting piece capable of driving the synchronous structure to move in cooperation with the tensioning wheel. The lead tension is adjusted by the tensioning wheel, and the two conveying wheels are synchronously driven by the linkage assembly to pre-relax the lead, so that the welding points are prevented from falling off due to the action force of the lead during the continuous welding process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of semiconductor device manufacturing, in particular to a wedge bonding head device. BACKGROUND

[0002] The wedge bonding head device is a key equipment for realizing the electrical connection between the chip and the substrate or lead frame in the semiconductor packaging process. The traditional wedge bonding technology directly stretches the lead through the welding head to complete the welding. When the first welding point is formed, the welding head moves or lifts, which easily applies additional traction to the first welding point, causing the welding point to be subjected to unnecessary pressure, increasing the risk of welding point deformation or fracture, and affecting the welding quality and long-term reliability of the device.

[0003] The currently disclosed Chinese patent CN115116916B discloses a lead welding device for semiconductor packaging. The device uses two first rollers to transport the lead outward from the welding head, so that the descent of the welding head is proportional to the transportation of the lead. Then, the welding head is completely reset from the inside of the support rod to stretch the first welding point. During the time when the welding head is not completely reset, the first welding point will not be directly stretched, preventing the problem of the first welding point of the lead and the chip falling off due to the large traction force of the support rod and the welding head lifting, which affects the welding quality. However, the descent of the welding head and the transportation of the lead may have a certain response delay, especially in high-speed welding process, which leads to the delay of lead transportation, affecting the welding efficiency and quality. Therefore, there is a need for a wedge bonding head device that can quickly respond without affecting the welding point. SUMMARY

[0004] In view of the problems existing in the prior art, a wedge bonding head device is provided. The device adjusts the lead tension through a tensioning wheel and uses a linkage assembly to make the two conveying wheels move synchronously, ensuring that the lead is relaxed in advance before the first welding point is welded, avoiding excessive traction force on the first welding point when moving to the second welding point.

[0005] In order to solve the prior art problems, the application provides a wedge bonding head device applied to lead welding of a semiconductor device, comprising a driving body, a welding head, a winding wheel and a conveying assembly arranged on the driving body, the welding head has a channel for the lead wire to pass through, the driving body is provided with an adjusting mechanism for adjusting the tightness of the lead wire during the conveying of the lead wire, the adjusting mechanism has a tensioning wheel, the conveying assembly comprises two conveying wheels arranged on both sides of the lead wire and capable of moving close to or away from each other, a linkage assembly is arranged between the adjusting mechanism and the two conveying wheels, the linkage assembly comprises a synchronous structure connected with the two conveying wheels and a connecting piece capable of driving the synchronous structure to move the two conveying wheels away from each other to release the clamping state of the lead wire when the tensioning wheel loosens the lead wire, so as to avoid the welding point from falling off due to the action force of the lead wire during the continuous welding process.

[0006] Preferably, the first sliding block is arranged on the driving body and used for rotatingly connecting the corresponding conveying wheel, the synchronous structure has a second sliding block and a connecting rod connected between the second sliding block and each first sliding block, and the driving body is provided with a guide rail in which the second sliding block is arranged to slide.

[0007] Preferably, the driving block is arranged on the driving body and used for rotatingly connecting the tensioning wheel, the connecting piece is arranged between the driving block and the second sliding block, and when the driving block drives the tensioning wheel to move to loosen the lead wire, the second sliding block is in a pulled state under the driving of the connecting piece, so that the two conveying wheels gradually move away from each other.

[0008] Preferably, the connecting piece is a pull rope fixedly connected between the driving block and the second sliding block.

[0009] Preferably, the driving body is provided with a guide wheel set for maintaining the pull rope to pull the second sliding block.

[0010] Preferably, the driving body is provided with a first reset spring connected with each first sliding block, and when the two conveying wheels move away from each other, the first reset spring is in a compressed state.

[0011] Preferably, the driving body is provided with a second reset spring connected with the driving block, and when the driving block moves in the direction of loosening the lead wire, the second reset spring is in a compressed state.

[0012] Preferably, the conveying wheel is of a rubber structure, and when the two conveying wheels abut against the lead wire, the lead wire is in a tightly clamped state, so that the lead wire can be stably conveyed.

[0013] The application has the following beneficial effects compared with the prior art:

[0014] 1. The present application adjusts the tension of the lead wire by the tensioning wheel and synchronizes the movement of the two conveying wheels by the linkage assembly, so that the lead wire is pre-relaxed before the welding of the first soldering point on the semiconductor device, the lead wire is kept in a relaxed state, the response speed is improved, and the first soldering point is prevented from falling off due to the force of the lead wire when the welding head moves towards the second soldering point after the welding of the first soldering point is completed.

[0015] Until the welding of the second soldering point is completed, the tensioning wheel and the conveying wheel are reset for the next operation, and the continuous welding effect is improved. Not only the structural integrity and electrical connection reliability of the soldering point are protected, but also the overall welding quality is improved, and efficient and accurate lead wire welding of the semiconductor device is realized.

[0016] 2. The present application realizes the synchronous movement of the two conveying wheels and the tensioning wheel through the synergistic effect of the tensioning wheel, the synchronous structure and the connecting piece. During the relaxation of the lead wire, the driving block moves the tensioning wheel and pulls the second sliding block through the pull rope, so that the two first sliding blocks drive the two conveying wheels away from each other under the action of the connecting rod, reducing the pressure of the lead wire.

[0017] During this process, the first reset spring and the second reset spring are compressed when the conveying wheel and the driving block move, respectively, and provide reverse thrust to help reset after the external force is removed. Not only the stability of the lead wire during the conveying process is ensured, but also the phenomenon of slipping or overstretching is avoided, and the automatic reset function is realized, preparing for the next operation.

[0018] 3. The present application makes the lead wire turn at a suitable angle after contacting the guide wheel, and directly extend to the entrance of the welding head along a straight path, avoiding unnecessary friction between the lead wire and the upper end of the welding head, and reducing the risk of potential damage.

[0019] At the same time, it ensures that the lead wire is in the best straight state when entering the welding area, ensuring that the lead wire between the guide wheel and the welding head remains straight and does not overbend. Even if the lead wire needs to be stretched during the movement of the welding head and the welding process, no additional traction force is applied to the first soldering point, effectively protecting the structural integrity of the first soldering point. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective structural schematic of a wedge bonding head device of the present application Figure 1 .

[0021] Figure 2 is a perspective structural schematic of a wedge bonding head device of the present application Figure 2 .

[0022] Figure 3 is a partial perspective structural sectional view of a wedge bonding head device of the present application Figure 1 .

[0023] Figure 4 is a partial perspective view of a wedge bonding head device according to the present application. Figure 2 .

[0024] Figure 5 is a partial perspective view of a wedge bonding head device according to the present application.

[0025] Figure 6 is a schematic view of a state in which a lead wire is actively tensioned in a wedge bonding head device according to the present application.

[0026] Figure 7 is a schematic view of a state in which a lead wire is actively relaxed in a wedge bonding head device according to the present application.

[0027] Figure 8 is a partial perspective view of a conveying wheel and linkage assembly of a wedge bonding head device according to the present application. Figure 1 .

[0028] Figure 9 is a partial perspective view of a conveying wheel and linkage assembly of a wedge bonding head device according to the present application. Figure 2 .

[0029] Figure 10 is a plan view of a conveying wheel and synchronization structure of a wedge bonding head device according to the present application.

[0030] Figure 11 is a schematic view of a state in which a lead wire is continuously welded in a wedge bonding head device according to the present application.

[0031] In the drawing: 1, lead wire; 2, bonding head; 3, winding wheel; 4, conveying assembly; 41, mounting frame; 411, first sliding block; 412, first return spring; 42, conveying wheel; 5, adjusting mechanism; 51, guide frame; 511, driving block; 512, second return spring; 52, tensioning wheel; 53, guide wheel; 6, linkage assembly; 61, synchronization structure; 611, second sliding block; 6111, guide rail; 612, connecting rod; 62, connecting member; 621, guide wheel set. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means and achieved specific purposes and functions of the present application, the present application is described in further detail below in conjunction with the drawings and specific embodiments.

[0033] Reference is made to Figures 1-7 and Figure 11As shown, a wedge bonding head device is applied to the wire 1 welding of a semiconductor device, which comprises a driving body, a welding head 2 arranged on the driving body, a channel for the wire 1 to pass through being arranged along the axial direction of the welding head 2, a winding wheel 3 and a conveying assembly 4 for conveying the wire 1 being arranged on the driving body, an adjusting mechanism 5 for adjusting the tightness of the wire 1 during the conveying process being arranged on the driving body, the conveying assembly 4 comprising a mounting frame 41 arranged on the driving body and two conveying wheels 42 symmetrically arranged on both sides of the wire 1, the two conveying wheels 42 being capable of rotating relative to each other and moving away from or close to each other, the adjusting mechanism 5 and the two conveying wheels 42 being connected through a linkage assembly 6, when the adjusting mechanism 5 loosens the wire 1, the two conveying wheels 42 move away from each other under the action of the linkage assembly 6 to release the clamping state of the wire 1, so as to avoid the welding point from falling off due to the action force of the wire 1 during the continuous welding process.

[0034] The semiconductor device is not shown in the figure.

[0035] The driving body is not shown in the figure.

[0036] The driving source for driving the conveying wheels 42 to rotate is not shown in the figure.

[0037] During the wire 1 welding process of the semiconductor device, first, when the wedge bonding head is ready for welding, the two conveying wheels 42 rotate relative to each other as the conveying assembly 4 is started, so that the wire 1 is pulled out from the winding wheel 3, and the effect of conveying the wire 1 is achieved in the initial stage, at this time, the winding wheel 3 on the driving body rotates to accurately send the wire 1 to the welding position through the channel arranged on the welding head 2. In this initial stage, the adjusting mechanism 5 ensures that the tightness of the wire 1 during the entire conveying process is moderate, so that the wire 1 will not be broken due to being too tight, and the welding will not be inaccurate due to being too loose.

[0038] As the driving body moves along the preset path, the welding head 2 gradually approaches the first welding point and performs welding operation. Before the driving body starts to move to the second welding point, the adjusting mechanism 5 actively loosens the wire 1, and at the same time, the two conveying wheels 42 move away from each other through the action of the linkage assembly 6, so as to release their clamping state to the wire 1. The pre-adjustment effectively avoids the excessive tension of the wire 1 to the first welding point, protects the first welding point from external force, and ensures the structural integrity and electrical connection reliability. During the entire movement process, even if the driving body is adjusted in position, the first welding point will not be damaged due to the stretching of the wire 1.

[0039] After the first welding point is completed, the driving body starts to move to the second welding point. During this process, the two conveying wheels 42 are also in a state of moving away from each other under the driving of the linkage assembly 6, so as to reduce the pressure on the lead wire 1 and prevent excessive traction on the first welding point during the stretching process. When the welding head 2 moves to the second welding point, the lead wire 1 is already in a relaxed state. Finally, after reaching the second welding point, the welding head 2 performs a second welding operation to complete the entire lead wire 1 welding process.

[0040] When the welding head 2 completes the welding task of the second welding point and lifts up, the driving body continues to move to the predetermined cutting position according to the preset path, and the driving body is provided with a cutting mechanism, which is not shown in the figure.

[0041] Subsequently, the cutting mechanism is started to perform a cutting operation. The adjustment mechanism 5 continues to start, so that the two conveying wheels 42 press the lead wire 1, and through the synchronous rotation of the two conveying wheels 42, the lead wire 1 on the winding wheel 3 is conveyed out of the specified position of the welding head 2, and the adjustment mechanism 5 is re-established to provide appropriate tension for the next welding cycle. Subsequently, the adjustment mechanism 5 relaxes the lead wire 1 again, and the linkage assembly 6 moves the two conveying wheels 42 away from each other to release the clamping state of the lead wire 1 and restore it to a low-tension relaxed state, preparing for the movement and welding of the subsequent welding points. The automatic adjustment and release of the tension of the lead wire 1 not only ensures the independence and stability of each welding operation, but also effectively avoids damage to the welded points caused by the pulling of the lead wire 1, improving the welding quality and the level of equipment automation.

[0042] Referring to Figures 1-7 As shown, the adjustment mechanism 5 includes a guide frame 51 provided on the driving body and a tensioning wheel 52 provided on the guide frame 51 for the lead wire 1 to wind out from the outside, and the tensioning wheel 52 can move towards or away from the winding wheel 3 on the guide frame 51. When the tensioning wheel 52 gradually moves towards the winding wheel 3, the lead wire 1 is in a gradually relaxed state.

[0043] The driving source for driving the movement of the tensioning wheel 52 is not shown in the figure.

[0044] When the lead wire 1 is loosened in advance before the lead wire 1 welding of the second welding point, the tensioning wheel 52 gradually moves towards the winding wheel 3, so that the tensioning wheel 52 gradually moves away from the lead wire 1, thereby reducing the tension on the lead wire 1 and making it in a gradually relaxed state.

[0045] After the first soldering point welding operation is completed, as the driving body moves, since the wire 1 part between the wire winding wheel 3 and the soldering head 2 is in a slack state, it is ensured that the soldering head 2 does not suffer excessive traction force during the movement to the position of the second soldering point, thereby ensuring that the first soldering point is not damaged and improving the welding quality.

[0046] After the second soldering point welding operation is completed, the tensioning wheel 52 is reset, the original tensioning force on the wire 1 is restored, and the two conveying wheels 42 return to the original position, so that the wire 1 can continue to be conveyed and preparation is made for the next operation of loosening the wire 1.

[0047] Specifically, after the second soldering point welding operation is completed, the wire is first accurately cut off by the cutting mechanism, and then the tensioning wheel 52 and the two conveying wheels 42 move synchronously. The tensioning wheel 52 moves away from the wire winding wheel 3 to reestablish the tension of the wire 1, and at the same time the conveying wheels 42 gradually contact the wire 1, and the wire 1 on the wire winding wheel 3 is actively conveyed by the rotation of the two conveying wheels 42.

[0048] For the continuous welding process, since the distance between adjacent soldering points on the semiconductor device is short, the length of the wire 1 loosened by the tensioning wheel 52 in front of the first soldering point is sufficient to cover the entire continuous welding process, so that the wire 1 between the soldering points is always in a slack state, avoiding the influence of excessive tension on the welding quality. As the continuous welding process progresses, the slack wire 1 is gradually used, and until the last soldering point is completed, the wire 1 naturally returns to the tensioning state. At this time, the wire is cut off again, and preparation is made for the next welding task in the region. Then the tensioning wheel 52 is reset to tighten the new wire 1 output from the wire winding wheel 3, and the conveying wheels 42 accurately send it to the specified position of the soldering head 2, preparing for the next welding cycle. In the entire process, the conveying wheels 42 do not need to fix the wire before the tensioning wheel 52 is reset, and the two are kept in synchronous motion to ensure the welding quality and process stability.

[0049] Referring to Figures 1-7 As shown, the guide frame 51 is provided with a guide wheel 53 above the soldering head 2 for the wire 1 to pass from the outside, and the part of the wire 1 between the guide wheel 53 and the soldering head 2 is kept in a straight state to prevent the wire 1 from rubbing against the upper end of the soldering head 2.

[0050] When the wire 1 is conveyed to the position of the soldering head 2 by the conveying assembly 4, the wire 1 first passes through the guide wheel 53 provided on the guide frame 51. This allows the wire 1 to turn at an appropriate angle after contacting the guide wheel 53 and directly extend along a straight path to the entrance of the soldering head 2. This avoids unnecessary friction between the wire 1 and the upper end of the soldering head 2, reducing the risk of potential damage.

[0051] At the same time, the lead wire 1 is kept in the best straight state when entering the welding area, so that the first welding point is not subjected to additional traction force even when the lead wire 1 is stretched during the movement of the welding head 2 and the welding process, because the lead wire 1 is kept straight and not excessively bent between the guide wheel 53 and the welding head 2. The structural integrity of the first welding point is effectively protected, ensuring that it is not damaged in any way, thereby ensuring the welding quality.

[0052] Referring to Figures 1-7 As shown, the linkage assembly 6 includes a synchronization structure 61 connecting the two conveying wheels 42 and a connecting piece 62 driving the synchronization structure 61 in cooperation with the tensioning wheel 52. When the tensioning wheel 52 moves, the two conveying wheels 42 are kept in a synchronous motion state under the drive of the synchronization structure 61.

[0053] When it is necessary to adjust the tightness of the lead wire 1, the tensioning wheel 52 starts to move and transmits the movement to the synchronization structure 61 through the connecting piece 62. With the movement of the tensioning wheel 52, the synchronization structure 61 ensures that the two conveying wheels 42 can be kept in a synchronous motion state, i.e., if the tensioning wheel 52 moves in a direction to loosen the lead wire 1, the synchronization structure 61 will drive the two conveying wheels 42 to move away from each other, thereby reducing the pressure on the lead wire 1 and loosening the lead wire 1.

[0054] Conversely, if it is necessary to increase the tension of the lead wire 1, the movement of the tensioning wheel 52 will cause the synchronization structure 61 to drive the two conveying wheels 42 to move closer to each other, thereby strengthening the clamping force on the lead wire 1. Throughout the process, the movement of the two conveying wheels 42 always remains coordinated due to the presence of the synchronization structure 61, ensuring that the tension of the lead wire 1 is uniform and stable during the conveying process, avoiding the phenomenon of lead wire 1 slipping or being excessively stretched due to the asynchronization of the conveying wheels 42.

[0055] Referring to Figures 3-10 As shown, the mounting frame 41 is respectively provided with a first sliding block 411 for rotationally connecting the corresponding conveying wheel 42 thereon, the synchronization structure 61 has a second sliding block 611 and a connecting rod 612 connected between the second sliding block 611 and each first sliding block 411, and the mounting frame 41 is provided with a guide rail 6111 for slidingly arranging the second sliding block 611 thereon.

[0056] When it is necessary to adjust the tightness of the lead wire 1, the second sliding block 611 slides along the guide rail 6111 provided on the mounting frame 41 and transmits the movement to the two first sliding blocks 411 through the connecting rod 612. Since the two ends of the connecting rod 612 are respectively connected to the second sliding block 611 and the first sliding block 411, the movement of the second sliding block 611 can accurately control the position change of the two first sliding blocks 411, thereby causing the corresponding conveying wheels 42 to move closer to or away from each other. It is ensured that the two conveying wheels 42 can keep a synchronous motion state at all times when the tension of the lead wire 1 is adjusted, realizing accurate regulation and control of the tightness of the lead wire 1.

[0057] Referring to Figures 3-10 As shown, the guide frame 51 is provided with a driving block 511 on which the tensioning wheel 52 is rotatably connected. The connecting member 62 is specifically a pull rope connected between the driving block 511 and the second sliding block 611. When the driving block 511 drives the tensioning wheel 52 to move to relax the lead wire 1, the second sliding block 611 is in a pulled state under the driving of the pull rope, so that the two conveying wheels 42 gradually move away from each other.

[0058] When it is necessary to relax the lead wire 1, the driving block 511 drives the tensioning wheel 52 to move, which is transmitted to the second sliding block 611 through the pull rope. With the movement of the driving block 511, the pull rope pulls the second sliding block 611 to slide along the guide rail 6111. The movement of the second sliding block 611 drives the two first sliding blocks 411 to gradually move away from each other, respectively.

[0059] When the driving block 511 drives the tensioning wheel 52 to move to relax the lead wire 1, it ensures that the two conveying wheels 42 respond synchronously, reducing the pressure on the lead wire 1, so as to realize the stable relaxation of the lead wire 1.

[0060] Referring to Figures 3-10 As shown, the guide frame 51 is rotatably provided with a set of guide wheels 621 for maintaining the pull rope to pull the second sliding block 611 powerfully.

[0061] The set of guide wheels 621 is composed of a plurality of guide wheels. In the cooperative working state of all the guide wheels, the second sliding block 611 can be effectively pulled by the driving block 511 through the support and guidance of the pull rope.

[0062] Specifically, the plurality of guide wheels are arranged on the path of the pull rope, helping to maintain the direction and tension of the pull rope, so that when the driving block 511 drives the tensioning wheel 52 to move to relax the lead wire 1, the pull rope can pull the second sliding block 611 stably and powerfully. Not only does it ensure the accurate movement of the second sliding block 611, but also it promotes the synchronous movement of the two conveying wheels 42 through the connecting rod 612, so as to realize the effective relaxation of the lead wire 1. In the process of moving the welding head 2 from the first welding point to the second welding point, the unnecessary traction force on the first welding point is reduced, improving the welding quality and stability.

[0063] Referring to Figures 2-4 and Figures 8-10 As shown, a first return spring 412 is arranged between the mounting frame 41 and each first sliding block 411. When the two conveying wheels 42 move away from each other, the first return spring 412 is in a compressed state.

[0064] When the driving block 511 moves to loosen the lead wire 1, the second slider 611 is pulled through the action of the pull rope and the synchronization structure 61, and then the two first sliders 411 respectively drive the corresponding conveying wheels 42 to move away from each other. In this process, the first reset spring 412 between the mounting frame 41 and each first slider 411 is compressed due to the movement of the first slider 411.

[0065] It is ensured that when the driving block 511 no longer exerts a loosening force on the lead wire 1, the first reset spring 412 in the compressed state can provide a reverse pushing force to help the first slider 411 and the conveying wheel 42 connected thereto to return to the original position. Not only does it achieve the function of flexibly adjusting the distance between the conveying wheels 42 as needed, but it also ensures that it can automatically reset after the operation is completed, preparing for the next time the lead wire 1 is conveyed.

[0066] Referring to Figure 2 As shown, the guide frame 51 is provided with a second reset spring 512 connected with the driving block 511. When the driving block 511 moves towards the direction of loosening the lead wire 1, the second reset spring 512 is in a compressed state.

[0067] When it is necessary to loosen the lead wire 1, the driving block 511 moves towards the direction of loosening the lead wire 1. With the movement of the driving block 511, the two conveying wheels 42 are gradually moved away from each other through the pull rope driving the synchronization structure 61, thereby achieving the loosening of the lead wire 1. In this process, the second reset spring 512 is in a compressed state due to the movement of the driving block 511, storing elastic potential energy.

[0068] Once the operation of loosening the lead wire 1 is completed and the driving block 511 is no longer subjected to external force, the second reset spring 512 in the compressed state releases the stored energy and can push the driving block 511 to gradually return to its original position, and then the tensioning wheel 52 also returns to the initial set position. Through the action of the second reset spring 512, the automatic reset function of the driving block 511 and the tensioning wheel 52 controlled thereby is achieved, preparing for the next operation of loosening the lead wire 1.

[0069] Referring to Figures 2-4 and Figures 8-10 As shown, the conveying wheel 42 is of a rubber structure, and when the two conveying wheels 42 abut against the lead wire 1, the lead wire 1 is in a tightly clamped state, so that the lead wire 1 can be stably conveyed.

[0070] When it is necessary to convey the lead wire 1, the two conveying wheels 42 move close to each other through the action of the synchronization structure 61, and the surface of the conveying wheel 42 made of rubber material contacts and slightly deforms due to pressure. Due to the high friction coefficient and good elastic deformation ability of the rubber material, the lead wire 1 can be tightly clamped. The contact area and friction force with the lead wire 1 are increased.

[0071] With the rotation of the conveying wheels 42, the lead wire 1 is firmly clamped between the two conveying wheels 42, ensuring that it can be smoothly and accurately pushed forward under precise control, avoiding any factors that may cause the lead wire 1 to lose control, ensuring the smooth progress of the entire welding process, and providing basic support for high-quality welding.

[0072] The present application adjusts the tension of the lead wire 1 by the tensioning wheel 52, and synchronizes the action of the two conveying wheels 42 by the linkage assembly 6, ensuring that the lead wire 1 is pre-loosened before welding at the first welding point, avoiding excessive pulling force on the first welding point when moving to the second welding point.

[0073] During the stretching of the lead wire 1, the guide wheel 53 allows the lead wire 1 to turn at an appropriate angle and remain straight to the welding head 2, reducing friction and the risk of damage, ensuring the optimal straightness of the lead wire 1, preventing additional pulling force from affecting the integrity of the welding point, and ensuring the stability of the lead wire 1 delivery and the welding quality.

[0074] The above embodiments only express one or several embodiments of the present application, which are described in detail and specifically, but cannot be understood as limiting the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A wedge bonding head device for bonding leads (1) of semiconductor devices, comprising a drive body, wherein the drive body is provided with a bonding head (2), a winding reel (3) and a conveying assembly (4), the bonding head (2) having a channel for the lead (1) to pass through; Its features are, The drive body is provided with an adjustment mechanism (5) for adjusting the tension of the lead wire (1) during the conveying process, and the adjustment mechanism (5) has a tensioning wheel (52); The conveying assembly (4) includes two conveying wheels (42) arranged on both sides of the lead wire (1) that can move closer or further apart from each other; A linkage component (6) is provided between the adjustment mechanism (5) and the two conveying wheels (42). The linkage component (6) includes a synchronization structure (61) connecting the two conveying wheels (42) and a connecting piece (62) that can cooperate with the tensioning wheel (52) to drive the synchronization structure (61) to move. As the tensioning wheel (52) loosens the lead wire (1), the synchronization structure (61) drives the two conveying wheels (42) to move away from each other under the action of the connector (62) to release the clamping state of the lead wire (1) and prevent the welding point from falling off due to the force of the lead wire (1) during continuous welding.

2. The wedge welding key head device according to claim 1, characterized in that, The drive body is provided with a first slider (411) for the corresponding conveying wheel (42) to rotate and be connected thereon. The synchronization structure (61) has a second slider (611) and a connecting rod (612) connecting the second slider (611) and each first slider (411). The drive body is provided with a guide rail (6111) for the second slider (611) to slide thereon.

3. The wedge welding key head device according to claim 2, characterized in that, A drive block (511) is slidably provided on the drive body for the tension wheel (52) to rotate and be connected thereon. The connecting member (62) is provided between the drive block (511) and the second slider (611). When the drive block (511) drives the tension wheel (52) to move and loosen the lead wire (1), the second slider (611) is pulled under the drive of the connecting member (62), so that the two conveying wheels (42) gradually move away from each other.

4. The wedge welding key head device according to claim 3, characterized in that, The connector (62) is specifically a pull rope that is fixedly connected between the drive block (511) and the second slider (611).

5. A wedge welding key head device according to claim 4, characterized in that, The drive body is equipped with a guide wheel assembly (621) for maintaining the strong traction of the second slider (611) by the pull rope.

6. The wedge welding key head device according to claim 2, characterized in that, The drive body is provided with a first return spring (412) that is connected to each first slider (411). When the two conveyor wheels (42) move away from each other, the first return spring (412) is in a compressed state.

7. A wedge welding key head device according to claim 3, characterized in that, The drive body is provided with a second return spring (512) connected to the drive block (511). When the drive block (511) moves in the direction of the release lead (1), the second return spring (512) is in a compressed state.

8. The wedge welding key head device according to claim 1, characterized in that, The conveyor wheel (42) is made of rubber. When the two conveyor wheels (42) come into contact with the lead wire (1), the lead wire (1) is tightly clamped, so that the lead wire (1) can be conveyed stably.

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