Bonding head capable of avoiding threading

Abstract

The utility model relates to the technical field of bonding equipment, in particular to a bonding head capable of avoiding threading, which comprises a bonding seat, a chopper, a rotating arm and a wire feeding arm, the chopper is mounted on the bonding seat, the tail end of the rotating arm is rotatably mounted on the bonding seat, and the wire feeding arm is mounted on the rotating arm; the wire feeding arm is provided with a wire clamp driving mechanism and a wire clamp which are connected with each other, and when the bonding head works, the clamping position of the wire clamp is located right above the chopper; and before threading the cleaver, the wire feeding arm is rotated to enable the wire clamp to be far away from the cleaver. According to the utility model, the rotating arm is rotatably arranged on the bonding seat, and the rotating arm is rotated before wire threading operation, so that the wire clamp is far away from the chopper, the wire clamp gives way for wire threading of the chopper, and the wire threading operation space is increased, so that high-efficiency wire threading can be carried out, a metal wire can be prevented from being bent, and the bonding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bonding equipment, in particular to a bonding head capable of avoiding wire threading. Background Art

[0002] Bonding equipment is a key equipment for chip packaging. The bonder bonds metal wires to the chip and the substrate in the form of ball bonding or wedge bonding. The metal wire is threaded through the capillary and extends from the end of the capillary. During bonding, the capillary moves down to weld the metal wire to the chip, and then the capillary moves to drive the metal wire to weld the metal wire to the substrate, and the capillary rises to break the metal wire. During the bonding process, the wire clamp feeds the wire to the capillary and provides the force to break the metal wire. Therefore, the clamping position of the wire clamp is directly above the capillary and the distance between the wire clamp and the capillary is very small. Before bonding, it is necessary to install the metal wire on the capillary, that is, wire threading. The wire clamp above the capillary makes the wire threading operation space small, affecting the wire threading action, resulting in slow wire threading speed and easy bending of the metal wire, affecting the bonding quality. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bonding head capable of avoiding wire threading, in which the wire clamp can give way for the capillary to thread the wire, increasing the operation space for wire threading, and having the characteristics of high wire threading efficiency and no damage to the metal wire.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A bonding head capable of avoiding wire threading includes a bonding seat, a capillary, a rotating arm and a wire feeding arm. The capillary is installed on the bonding seat. The tail end of the rotating arm is rotatably installed on the bonding seat, and the wire feeding arm is installed on the rotating arm;

[0006] The wire feeding arm is provided with a connected wire clamp driving mechanism and a wire clamp. When the bonding head works, the clamping position of the wire clamp is directly above the capillary; before threading the wire to the capillary, rotate the wire feeding arm to make the wire clamp away from the capillary.

[0007] Further, a rotating mounting seat is arranged on the side of the bonding seat, and the tail end of the rotating arm is rotatably arranged on the rotating mounting seat;

[0008] The rotating arm is provided with a locking member, and the bonding seat is provided with a positioning hole corresponding to the position of the locking member; when the clamping position of the wire clamp is directly above the capillary, the locking member cooperates with the positioning hole to lock the position of the rotating arm.

[0009] Further, the rotating mounting seat is provided with an installation groove. The top and bottom of the installation groove are respectively provided with bearings. A hinge pin penetrates through the two bearings. The tail end of the rotating arm extends into the installation groove, and the hinge pin penetrates through the bearings and the tail end of the rotating arm.

[0010] Further, a setscrew is provided at the tail end of the rotating arm, and after the setscrew is inserted into the rotating arm, it abuts against the hinge pin.

[0011] Further, the front end of the wire feeding arm is rotatably connected to the front end of the rotating arm. The bonding seat is provided with a front swing head for limiting the tail end of the wire feeding arm, and the wire feeding arm is further provided with a wire feeding push rod.

[0012] The bonding seat is provided with a wire feeding driving member for pushing the wire feeding push rod, and the wire feeding driving member pushes the wire feeding push rod to swing the wire feeding arm.

[0013] Further, a return spring is connected to the tail end of the wire feeding arm, and one end of the return spring is detachably connected to the bonding seat.

[0014] Further, the wire feeding push rod is fixedly connected to the wire feeding arm through a wire feeding swing arm, and the end of the return spring is positioned at the wire feeding swing arm.

[0015] Further, a bearing is provided at the end of the wire feeding driving member, the wire feeding push rod is provided with a transmission surface, and the wheel surface of the bearing is attached to the transmission surface.

[0016] The transmission surface is perpendicular to the pushing direction of the wire feeding driving member, and the wire feeding push rod is an inclined rod.

[0017] Further, the bonding seat is further provided with a wire passing tube, and the wire passing tube is located above the split blade. During bonding, the wire clamp is located between the wire passing tube and the split blade.

[0018] The technical solution provided by the present utility model may include the following beneficial effects:

[0019] In the present utility model, the rotating arm is rotatably installed on the bonding seat. Before the wire threading operation, the rotating arm is rotated to move the wire clamp away from the split blade, so that the wire clamp gives way for the split blade to thread the wire, increasing the operation space for wire threading. Thus, efficient wire threading can be carried out, and the metal wire can be prevented from being bent, improving the bonding quality. The bonding head of the present utility model also has the characteristics of being structurally compact and simple. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a bonding head according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the bonding head from another perspective;

[0022] Figure 3 is a schematic diagram of the bonding head after removing the rotating arm;

[0023] Figure 4It is a schematic diagram of the cooperation between the wire feeding arm and the wire feeding driving part;

[0024] Reference numerals:

[0025] Bonding seat 1, rotating mounting seat 11, mounting groove 111, hinge pin 112, front swing head 12, bonding tool 2,

[0026] Rotating arm 3, locking member 31, set screw 32, wire feeding arm 4, wire feeding push rod 41, transmission surface 411, return spring 42, wire feeding swing arm 43, wire clamp driving mechanism 5, wire clamp 6, wire feeding driving part 7, bearing 71, wire passing tube 8. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0028] Below in conjunction with Figures 1 to 4 , a bonding head capable of avoiding wire threading is described for the embodiments of the present utility model.

[0029] A bonding head capable of avoiding wire threading according to an embodiment of the present utility model includes a bonding seat 1, a bonding tool 2, a rotating arm 3 and a wire feeding arm 4. The bonding tool 2 is installed on the bonding seat 1. The tail end of the rotating arm 3 is rotatably installed on the bonding seat 1. The wire feeding arm 4 is installed on the rotating arm 3. A wire clamp driving mechanism 5 and a wire clamp 6 are connected and installed on the wire feeding arm 4. When the bonding head works, the clamping position of the wire clamp 6 is directly above the bonding tool 2. Before threading the wire into the bonding tool 2, rotate the wire feeding arm 4 to make the wire clamp 6 away from the bonding tool 2.

[0030] In this technical solution, the rotating arm 3 is rotatably installed on the bonding seat 1. Before the wire threading operation, rotate the rotating arm 3 to make the wire clamp 6 away from the bonding tool 2, so that the wire clamp 6 gives way for the wire threading of the bonding tool 2, increasing the operation space for wire threading, enabling efficient wire threading, and avoiding bending of the metal wire, improving the bonding quality. When a spark generator is installed on the bonding seat 1, the wire clamp 6 and the spark generator are respectively arranged on both sides of the bonding seat 1, and the rotating arm 3 drives the wire clamp 6 to rotate towards the outside of the bonding seat 1 for wire threading to give way. Specifically, the bonding seat 1 is further provided with a wire passing tube 8. The wire passing tube 8 is located above the bonding tool 2. During bonding, the wire clamp 6 is located between the wire passing tube 8 and the bonding tool 2. The metal wire passes through the wire passing tube 8, the wire clamp 6 and the bonding tool 2 in sequence. The wire passing tube 8 is used for guiding the metal wire and improving the wire feeding accuracy of the metal wire.

[0031] In order to facilitate the installation of the rotating arm 3 and ensure the bonding stability, in an embodiment of the present utility model, a rotating mounting seat 11 is provided on the side of the bonding seat 1, and the tail end of the rotating arm 3 is rotatably arranged on the rotating mounting seat 11; the rotating arm 3 is provided with a locking member 31, and the bonding seat 1 is provided with a positioning hole corresponding to the position of the locking member 31; when the clamping position of the wire clamp 6 is directly above the bonding tool 2, the locking member 31 cooperates with the positioning hole to lock the position of the rotating arm 3.

[0032] By arranging the rotating mounting seat 11 on the side of the bonding seat 1 instead of using a bracket to mount the rotating arm 3 on the bonding seat 1, when the rotating arm 3 rotates, it will not interfere with other components on the bonding seat 1, which is beneficial to the smooth rotation of the rotating arm 3. Based on the arrangement of the locking member 31 and the positioning hole, the rotating arm 3 can be reliably positioned before bonding, that is, the reliable positioning of the wire clamp 6 is realized, ensuring the bonding effect. Exemplarily, the locking member 31 is a knurled locking screw, and the positioning hole is a threaded hole. The knurled locking screw passes through the rotating arm 3 and then is screwed into the threaded hole to lock the position of the rotating arm 3. This locking structure is simple and easy to operate.

[0033] Preferably, the rotating mounting seat 11 is provided with an installation groove 111, the top and bottom of the installation groove 111 are respectively provided with bearings, and a hinge pin 112 passes through the two bearings. The tail end of the rotating arm 3 extends into the installation groove 111, and the hinge pin 112 passes through the bearing and the tail end of the rotating arm 3. The rotating arm 3 is arranged in the installation groove 111 through the bearing and the hinge pin 112, making the rotation process of the rotating arm 3 smooth and stable.

[0034] Further preferably, a set screw 32 is provided at the tail end of the rotating arm 3, and the set screw 32 abuts against the hinge pin 112 after being inserted into the rotating arm 3. The set screw 32 is used to relatively fix the rotating arm 3 and the hinge pin 112, making the connection between the rotating arm 3 and the hinge pin 112 stable. The rotating arm 3 will not shake when rotating, preventing the wire clamp 6 from touching the bonding tool 2 when the rotating arm 3 rotates.

[0035] In order to realize wire feeding for bonding, in an embodiment of the present utility model, the front end of the wire feeding arm 4 is rotatably connected to the front end of the rotating arm 3, the bonding seat 1 is provided with a front swing head 12 for limiting the tail end of the wire feeding arm 4, and the wire feeding arm 4 is further provided with a wire feeding push rod 41;

[0036] The bonding seat 1 is provided with a wire feeding driving member 7 for pushing the wire feeding push rod 41, and the wire feeding driving member 7 pushes the wire feeding push rod 41 to swing the wire feeding arm 4.

[0037] Based on the setting of the front swing head 12, the wire feeding push rod 41 can only push the wire feeding arm to swing in one direction. Cooperating with the wire clamp driving mechanism 5, the wire can be fed to the bonding tool 2 through the wire clamp 6. The front swing head 12 is also used to define the reset position of the wire feeding arm, and this wire feeding structure is simple. Specifically, the top surface of the front swing head 12 cooperates with the bottom surface of the wire feeding arm 4, so that the wire feeding arm 4 and the wire clamp 6 can only swing downward. When feeding the wire, the wire clamp 6 swings downward while clamping the wire, and feeds the wire to the bonding tool 2. After the wire feeding is completed, the wire feeding push rod 41 retracts to reset the wire feeding arm 4, and then the next wire feeding action starts.

[0038] Preferably, a reset spring 42 is connected to the tail end of the wire feeding arm 4, and one end of the reset spring 42 is detachably connected to the bonding seat 1. The reset spring 42 is used to restore the wire feeding arm 4 to the state of abutting against the front swing head, that is, to realize the reset of the wire clamp 6. Making the reset spring 42 detachably connected to the bonding seat 1 can facilitate the rotation of the rotating arm 3. Exemplarily, the bonding seat 1 is provided with a hook, and the end of the reset spring 42 has a connecting ring, and the hook can hook the connecting ring to realize the detachable installation of the reset spring 42.

[0039] Further, the wire feeding push rod 41 is fixedly connected to the wire feeding arm 4 through a wire feeding rocker arm 43, and the end of the reset spring 42 is positioned on the wire feeding rocker arm 43, making the structure of the wire feeding arm 4 compact, which is beneficial to simplifying the structure of the bonding head and reducing the volume.

[0040] In an embodiment of the present invention, a bearing 71 is provided at the end of the wire feeding driving member 7, the wire feeding push rod 41 is provided with a transmission surface 411, and the wheel surface of the bearing 71 abuts against the transmission surface 411;

[0041] The transmission surface 411 is perpendicular to the pushing direction of the wire feeding driving member 7, and the wire feeding push rod 41 is an inclined rod.

[0042] Through the setting of the transmission surface 411, the horizontal movement of the wire feeding push rod 41 can be transmitted into the swing of the wire feeding arm 4, and then the downward movement of the wire clamp 6 is realized. The wire feeding driving member 7 can be horizontally arranged on the bonding seat 1, making the structure of the bonding head more compact. Exemplarily, the wire feeding driving member 7 is a cylinder, a voice coil motor or a linear motor.

[0043] For those of ordinary skill in the art, other components and operations of a bonding head capable of avoiding wire threading according to the embodiments of the present invention are known, and will not be described in detail here.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe the features, without order or importance.

[0045] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0046] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0047] In the description of this specification, the descriptions referring to the terms "embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A wire bonding head capable of avoiding wire threading, characterized in that, It includes a bonding base, a bonding tool, a rotating arm and a wire feeding arm. The bonding tool is installed on the bonding base. The tail end of the rotating arm is rotatably installed on the bonding base. The wire feeding arm is installed on the rotating arm. The wire feeding arm is equipped with a connected wire clamp driving mechanism and a wire clamp. When the bonding head is working, the clamping position of the wire clamp is directly above the bonding tool. Before threading the wire through the bonding tool, rotate the wire feeding arm to move the wire clamp away from the bonding tool.

2. The bond head capable of avoiding wire threading according to claim 1, characterized in that, A rotating mounting seat is arranged on the side of the bonding base. The tail end of the rotating arm is rotatably arranged on the rotating mounting seat. The rotating arm is provided with a locking member. The bonding base is provided with a positioning hole corresponding to the position of the locking member. When the clamping position of the wire clamp is directly above the bonding tool, the locking member cooperates with the positioning hole to lock the position of the rotating arm.

3. The bond head capable of avoiding wire threading according to claim 2, wherein, The rotating mounting seat is provided with a mounting groove. The top and bottom of the mounting groove are respectively provided with bearings. A hinge pin passes through the two bearings. The tail end of the rotating arm extends into the mounting groove, and the hinge pin passes through the bearings and the tail end of the rotating arm.

4. The bond head capable of avoiding wire threading according to claim 3, wherein A setscrew is arranged at the tail end of the rotating arm. After the setscrew is inserted into the rotating arm, it abuts against the hinge pin.

5. The bond head capable of avoiding wire threading according to claim 1, characterized in that The front end of the wire feeding arm is rotatably connected to the front end of the rotating arm. The bonding base is provided with a front swing head for limiting the tail end of the wire feeding arm. The wire feeding arm is also provided with a wire feeding push rod. The bonding base is provided with a wire feeding driving member for pushing the wire feeding push rod. The wire feeding driving member pushes the wire feeding push rod to swing the wire feeding arm.

6. The bond head capable of avoiding wire threading according to claim 5, characterized in that, The tail end of the wire feeding arm is connected with a return spring. One end of the return spring is detachably connected to the bonding base.

7. The bond head capable of avoiding wire threading according to claim 6, wherein The wire feeding push rod is fixedly connected to the wire feeding arm through a wire feeding rocker arm. The end of the return spring is positioned on the wire feeding rocker arm.

8. The bond head capable of avoiding wire threading according to claim 6, wherein A bearing is arranged at the end of the wire feeding driving member. The wire feeding push rod is provided with a transmission surface. The wheel surface of the bearing is attached to the transmission surface. The transmission surface is perpendicular to the pushing direction of the wire feeding driving member. The wire feeding push rod is an inclined rod.

9. The bond head capable of avoiding wire threading according to any one of claims 1 to 8, characterized in that, The bonding base is also provided with a wire passing tube. The wire passing tube is located above the bonding tool. During bonding, the wire clamp is located between the wire passing tube and the bonding tool.

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