Chip lead bonding process head
By using a combination of a grating encoder and a voice coil motor in the wire bonding process head, precise control of the welding wire is achieved, and by adjusting the position of the movable and fixed parts of the wire clip to adapt to the chopping knife of different lengths, the problems of inaccurate distance control and poor matching in the prior art are solved, and the welding quality and equipment versatility and flexibility are improved.
Patent Information
- Application Number
- CN202422008645.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-19
AI Technical Summary
In the existing wire bonding technology, the distance between the clamp tip and the cutting knife tip is not accurate, which makes it difficult for the welding wire to control in the process of manufacturing different shapes of arch arcs, affecting the welding quality; lack of a high-precision displacement detection system, and it is impossible to monitor and adjust the position of the welding wire in real time, which is prone to welding deviations; the matching of the clamp and the cutting knife is poor, making it difficult to adapt to cutting knife of different lengths, limiting the versatility and flexibility of the equipment; the welding wire is easily scratched and contaminated when passing through the equipment, affecting the welding effect and the maintenance of the equipment.
A chip wire bonding process head is designed, and a grating encoder is used to detect the displacement of the end of the elastic cantilever, and combined with the voice coil motor to drive the elastic cantilever movement to achieve precise control of the welding wire; by adjusting the position of the moving and fixed parts of the wire clip, it is suitable for cutting knives of different lengths; a wire hose is used to protect the welding wire to prevent scratches and contamination.
It realizes precise control of welding wire in the process of manufacturing arcs of different shapes, improves welding quality and equipment versatility and flexibility; through high-precision displacement detection and adaptive design, it reduces welding deviation and equipment maintenance difficulties.
Smart Images
Figure CN222953030U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chip wire bonding packaging, in particular to a chip wire bonding process head. Background Art
[0002] Wire bonding is a technique for connecting metal pads on a chip to external pins or leads, commonly used in integrated circuit packaging.
[0003] The existing wire bonding technology has the following problems: the distance between the tip of the wire clamp and the tip of the splitter is not accurately controlled, which makes it difficult to control the welding wire in the process of manufacturing arch arcs of different shapes, affecting the welding quality; there is a lack of a high-precision displacement detection system, which makes it impossible to monitor and adjust the position of the welding wire in real time, and welding deviations are prone to occur; the matching of the wire clamp and the splitter is poor, and it is difficult to adapt to splitters of different lengths, which limits the versatility and flexibility of the equipment; the welding wire is easily scratched and contaminated when passing through the equipment, affecting the welding effect and the maintainability of the equipment. Utility Model Content
[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide a chip wire bonding process head to solve the problem of inaccurate distance control between the tip of the wire clamp and the tip of the wedge knife mentioned in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A chip wire bonding process head, comprising:
[0007] A base, a cavity is arranged on the lower surface of the base, an elastic cantilever is fixedly connected to the base, a grating encoder is arranged on the lower surface of the base, a grating encoder is arranged on the end of the elastic cantilever, a voice coil motor is arranged on the front end of the base, a transducer is fixedly connected to the end of the elastic cantilever, a splitter is arranged on the end of the transducer, a wire clamp is fixedly connected to the end of the elastic cantilever, a wire clamp motor is arranged on one side of the wire clamp, an active wire feeder is fixedly connected to the upper surface of the base, an optical fiber sensor is fixedly connected to the active wire feeder, a stepper motor is fixedly connected to the active wire feeder, and the stepper A welding wire spool is fixedly connected to the rotating shaft of the motor, a heating wire is fixedly connected to the right side of the base, a chopper is arranged inside the heating wire, a welding wire 1 is arranged inside the voice coil motor, a wire clamp motor is arranged on one side of the wire clamp, a wire clamp movable part is arranged on one side of the wire clamp, a wire clamp fixed part is arranged on one side of the wire clamp movable part, a wire passing hose part is arranged on one side of the wire clamp movable part, a wire passing hose lower end fixing part is arranged on the side of the wire clamp movable part, a wire passing hose upper end fixing part is arranged on one side of the wire passing hose part, and welding wire 2 is arranged on the side of the wire passing hose lower end fixing part.
[0008] Preferably: the end of the elastic cantilever can move up and down a small distance, the reading head of the grating encoder is fixedly connected to the small surface of the base, the grating scale of the grating encoder is fixedly connected to the end of the elastic cantilever, the grating encoder is used to detect the displacement of the end of the elastic cantilever, the front end of the base is provided with a through hole, and the base is fixedly connected to the stator of the voice coil motor through the through hole, the end of the elastic cantilever is fixedly connected to the mover of the voice coil motor, the voice coil motor is used to drive the end of the elastic cantilever to move, the end of the transducer is provided with a through hole, and the transducer is fixedly connected to the chopper through the through hole, the wire clamp is fixedly connected to the mover of the wire clamp motor, the left side of the base is fixedly connected to the stator of the wire clamp motor, the end of the heating wire is spiral, and the chopper passes through the spiral hole of the heating wire.
[0009] Preferably, the displacement amplitude of the end of the elastic cantilever is one millimeter.
[0010] Preferably, the grating encoder detects the end displacement of the elastic cantilever in a ratio of 1:1.
[0011] Preferably, the driving force of the voice coil motor acts in a direction coaxial with the chopper, and the welding wire passes vertically through the center of the voice coil motor.
[0012] Preferably: the wire clamp and the mover of the wire clamp motor are fixedly connected at the end of the elastic cantilever, the stator of the wire clamp motor is fixedly connected to the left side of the base, the heating wire is fixedly connected to the right side of the base, the wire-passing hose passes through the transducer, the vertical distance between the tip of the wire clamp and the tip of the chopper is less than 0.5 mm, and the horizontal distance is less than 0.2 mm, and the position of the wire clamp movable part and the wire clamp fixed part of the wire clamp can adapt to a chopper with a length of sixteen to twenty-five mm.
[0013] Preferably: the angle between the welding wire 2 at the tip of the wire clamp and the tip of the splitter is forty-five degrees, the angle of the welding wire 2 at the tip of the wire clamp is constrained by the wire clamp movable part of the wire clamp, the upper end of the wire passing hose part is fixedly connected to the wire clamp fixed part position of the wire clamp through the wire passing hose upper end fixing part, the lower end of the wire passing hose part is fixedly connected to the wire clamp movable part position of the wire clamp through the wire passing hose lower end fixing part, and the wire passing hose part is used for convenient disassembly, assembly and maintenance.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] The invention relates to a process head for chip wire bonding. In the wire bonding process, the closer the tip of the wire clamp is to the tip of the splitter, the easier it is to control the welding wire in the process of manufacturing arched arcs of different shapes. The design of the device makes the vertical distance between the tip of the wire clamp and the tip of the splitter less than 0.5 mm, and the horizontal distance less than 0.2 mm. Combined with a high-precision grating encoder, precise control of the welding wire is achieved. By adjusting the position of the movable part and the fixed part of the wire clamp, the device can adapt to splitters with a length of 16-25 mm, covering the needs of a full range of splitters. On the path where the welding wire passes, a wire hose is used to effectively protect the welding wire from being scratched. At the same time, the wire hose design is easy to disassemble and clean and maintain, prevents the welding wire from being dirty, and ensures the long-term stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the overall two-dimensional structure of the utility model from a side view;
[0018] Figure 3 It is a schematic diagram of the overall main two-dimensional structure of the utility model;
[0019] Figure 4 For the utility model Figure 1 The structural diagram at A in the middle;
[0020] Figure 5 For the utility model Figure 2 Schematic diagram of the structure at B in the figure.
[0021] In the figure: 1. base; 2. elastic cantilever; 3. grating encoder; 4. voice coil motor; 5. splitter; 6. transducer; 7. wire clamp; 8. active wire feeder; 9. heating wire; 10. welding wire spool; 11. welding wire one; 12. stepping motor; 13. optical fiber sensor; 14. wire clamp motor; 15. wire clamp movable part; 16. wire clamp fixed part; 17. welding wire two; 18. wire passing hose part; 19. wire passing hose upper end fixing part; 20. wire passing hose lower end fixing part. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] See also Figure 1-5The utility model provides an embodiment: a process head for chip wire bonding, comprising: a base 1, a cavity is arranged on the lower surface of the base 1, an elastic cantilever 2 is fixedly connected to the base 1, a grating encoder 3 is arranged on the lower surface of the base 1, a grating encoder 3 is arranged on the end of the elastic cantilever 2, a voice coil motor 4 is arranged on the front end of the base 1, a transducer 6 is fixedly connected to the end of the elastic cantilever 2, a splitter 5 is arranged on the end of the transducer 6, a wire clamp 7 is fixedly connected to the end of the elastic cantilever 2, a wire clamp motor 14 is arranged on one side of the wire clamp 7, an active wire feeder 8 is fixedly connected to the upper surface of the base 1, an optical fiber sensor 13 is fixedly connected to the active wire feeder 8, a stepper is fixedly connected to the active wire feeder 8 A motor 12, a welding wire spool 10 is fixedly connected to the rotating shaft of the stepper motor 12, a heating wire 9 is fixedly connected to the right side of the base 1, a splitter 5 is arranged inside the heating wire 9, a welding wire 11 is arranged inside the voice coil motor 4, a wire clamp motor 14 is arranged on one side of the wire clamp part 7, a wire clamp movable part 15 is arranged on one side of the wire clamp part 7, a wire clamp fixed part 16 is arranged on one side of the wire clamp movable part 15, a wire passing hose part 18 is arranged on one side of the wire clamp movable part 15, a wire passing hose lower end fixing part 20 is arranged on the side of the wire clamp movable part 15, a wire passing hose upper end fixing part 19 is arranged on one side of the wire passing hose part 18, and a welding wire 2 17 is arranged on the side of the wire passing hose lower end fixing part 20.
[0024] The end of the elastic cantilever 2 can move up and down a small distance, the reading head of the grating encoder 3 is fixedly connected to the small surface of the base 1, the grating scale of the grating encoder 3 is fixedly connected to the end of the elastic cantilever 2, the grating encoder 3 is used to detect the displacement of the end of the elastic cantilever 2, the front end of the base 1 is provided with a through hole, and the base 1 is fixedly connected to the stator of the voice coil motor 4 through the through hole, the end of the elastic cantilever 2 is fixedly connected to the mover of the voice coil motor 4, the voice coil motor 4 is used to drive the end of the elastic cantilever 2 to move, the end of the transducer 6 is provided with a through hole, and the transducer 6 is fixedly connected to the splitting knife 5 through the through hole, the wire clamp 7 is fixedly connected to the mover of the wire clamp motor 14, the left side of the base 1 is fixedly connected to the stator of the wire clamp motor 14, the end of the heating wire 9 is spiral, and the splitting knife 5 passes through the spiral hole of the heating wire 9.
[0025] The displacement amplitude of the end of the elastic cantilever 2 is one millimeter.
[0026] The ratio of the grating encoder 3 to the end displacement detection of the elastic cantilever 2 is 1:1.
[0027] The driving force of the voice coil motor 4 acts in a direction coaxial with the chopper 5 , and the welding wire 11 vertically passes through the center of the voice coil motor 4 .
[0028] The wire clamp 7 and the mover of the wire clamp motor 14 are fixedly connected to the end of the elastic cantilever 2, the stator of the wire clamp motor 14 is fixedly connected to the left side of the base 1, the heating wire 9 is fixedly connected to the right side of the base 1, the wire hose 18 passes through the transducer 6, the vertical distance between the tip of the wire clamp 7 and the tip of the splitting knife 5 is less than 0.5 mm, and the horizontal distance is less than 0.2 mm. The position of the wire clamp movable part 15 and the wire clamp fixed part 16 of the wire clamp 7 can adapt to the splitting knife 5 with a length of sixteen to twenty-five mm.
[0029] The angle between the welding wire 17 at the tip of the wire clamp 7 and the tip of the splitter 5 is forty-five degrees. The angle of the welding wire 17 at the tip of the wire clamp 7 is constrained by the wire clamp movable part 15 of the wire clamp 7. The upper end of the wire-passing hose part 18 is fixedly connected to the wire clamp fixed part 16 of the wire clamp 7 through the wire-passing hose upper end fixing part 19, and the lower end of the wire-passing hose part 18 is fixedly connected to the wire clamp movable part 15 of the wire clamp 7 through the wire-passing hose lower end fixing part 20. The wire-passing hose part 18 is used for convenient disassembly and maintenance.
[0030] Working principle: base 1, used to install other components; elastic cantilever 2, to achieve up and down displacement of a small distance; grating encoder 3, to detect the displacement of elastic cantilever 2; voice coil motor 4, to drive elastic cantilever 2 to move up and down; splitting knife 5, to press the welding wire on the chip and can transmit ultrasonic vibration to the welding wire; transducer 6, to output ultrasonic wave to splitting knife 5; wire clamp 7, to control the activity state of welding wire at the tip of splitting knife 5; active wire feeder 8, to control the rotation of welding wire shaft according to the tension state of welding wire and output welding wire to wire clamp; heating wire 9, to heat the welding wire inside splitting knife 5. An active wire feeder 8 is fixedly connected to the upper surface of the base 1, a cavity is provided on the lower surface of the base 1, and an elastic cantilever 2 is fixedly connected thereto. The end of the elastic cantilever 2 can move freely. A reading head of a grating encoder 3 is fixedly connected to the lower surface of the base 1. The end of the elastic cantilever 2 is fixedly connected to a grating scale of the grating encoder 3. The grating encoder 3 detects the displacement of the end of the elastic cantilever 2. A through hole is provided at the front end of the base 1, and a stator of a voice coil motor 4 is fixedly connected thereto. The end of the elastic cantilever 2 is fixedly connected to a mover of the voice coil motor 4. The voice coil motor 4 drives the end of the elastic cantilever 2 to move. The end of the elastic cantilever 2 is fixedly connected to a transducer 6. A through hole is provided at the end of the transducer 6, and a chopper 5 is fixedly connected thereto. The end of the elastic cantilever 2 is fixedly connected to a wire clamp 7, and the wire clamp 7 is fixedly connected to the wire clamp motor The movable member 14 is fixedly connected to the stator of the wire clamp motor 14 on the left side of the base 1, and the optical fiber sensor 13 is fixedly connected to the active wire feeder 8 to detect the tension state of the welding wire. The active wire feeder 8 is fixedly connected to the stepper motor 12, and the rotating shaft of the stepper motor 12 is fixedly connected to the welding wire spool 10. The path of the welding wire 11: passes through the voice coil motor 4, the wire hose component 18, and the wire clamp component 7 in sequence, so as to accurately control the welding wire; by adjusting the position of the movable part and the fixed part of the wire clamp, it can adapt to the splitting knife 5 with a length of sixteen to twenty-five millimeters, covering the whole series of splitting knives 5; on the path where the welding wire passes, a wire hose is used, which can effectively protect the welding wire from being scratched, and the wire hose can be easily disassembled for cleaning and maintenance to avoid the welding wire from being dirty.
[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A chip wire bonding process head, characterized in that: include: A base (1), wherein a cavity is provided on the lower surface of the base (1), the base (1) is fixedly connected to an elastic cantilever (2), a grating encoder (3) is provided on the lower surface of the base (1), the end of the elastic cantilever (2) is provided with a grating encoder (3), a voice coil motor (4) is provided at the front end of the base (1), a transducer (6) is fixedly connected to the end of the elastic cantilever (2), a chopper (5) is provided at the end of the transducer (6), a wire clamp (7) is fixedly connected to the end of the elastic cantilever (2), a wire clamp motor (14) is provided on one side of the wire clamp (7), an active wire feeder (8) is fixedly connected to the upper surface of the base (1), an optical fiber sensor (13) is fixedly connected to the active wire feeder (8), a stepping motor (12) is fixedly connected to the active wire feeder (8), and the stepping motor ( A welding wire spool (10) is fixedly connected to the rotating shaft of the base (12), a heating wire (9) is fixedly connected to the right side of the base (1), a splitting knife (5) is arranged inside the heating wire (9), a welding wire one (11) is arranged inside the voice coil motor (4), a wire clamp motor (14) is arranged on one side of the wire clamp member (7), a wire clamp movable part (15) is arranged on one side of the wire clamp member (7), a wire clamp fixed part (16) is arranged on one side of the wire clamp movable part (15), a wire passing hose member (18) is arranged on one side of the wire clamp movable part (15), a wire passing hose lower end fixing member (20) is arranged on the side of the wire passing hose member (15), a wire passing hose upper end fixing member (19) is arranged on one side of the wire passing hose member (18), and welding wire two (17) is arranged on the side of the wire passing hose lower end fixing member (20).
2. A chip wire bonding process head according to claim 1, characterized in that: The end of the elastic cantilever (2) can move up and down a small distance, the reading head of the grating encoder (3) is fixedly connected to the small surface of the base (1), the grating scale of the grating encoder (3) is fixedly connected to the end of the elastic cantilever (2), the grating encoder (3) is used to detect the displacement of the end of the elastic cantilever (2), the front end of the base (1) is provided with a through hole, and the base (1) is fixedly connected to the stator of the voice coil motor (4) through the through hole, and the end of the elastic cantilever (2) is fixedly connected to the stator of the voice coil motor (4). The voice coil motor (4) is fixedly connected to a mover of the voice coil motor (4), the voice coil motor (4) is used to drive the end of the elastic cantilever (2) to move, the end of the transducer (6) is provided with a through hole, and the transducer (6) is fixedly connected to a chopper (5) through the through hole, the wire clamp (7) is fixedly connected to the mover of the wire clamp motor (14), the left side of the base (1) is fixedly connected to the stator of the wire clamp motor (14), the end of the heating wire (9) is spiral, and the chopper (5) passes through the spiral hole of the heating wire (9).
3. A chip wire bonding process head according to claim 1, characterized in that: The displacement amplitude of the end of the elastic cantilever (2) is one millimeter.
4. A chip wire bonding process head according to claim 1, characterized in that: The ratio of the grating encoder (3) to the end displacement detection of the elastic cantilever (2) is 1:
1.
5. The chip wire bonding process head according to claim 1, characterized in that: The driving force of the voice coil motor (4) acts in a direction coaxial with the splitter (5), and the welding wire (11) vertically passes through the center of the voice coil motor (4).
6. A chip wire bonding process head according to claim 5, characterized in that: The wire clamp (7) and the mover of the wire clamp motor (14) are fixedly connected to the end of the elastic cantilever (2), the stator of the wire clamp motor (14) is fixedly connected to the left side of the base (1), the heating wire (9) is fixedly connected to the right side of the base (1), the wire-passing hose (18) passes through the transducer (6), the vertical distance between the tip of the wire clamp (7) and the tip of the splitter (5) is less than 0.5 mm, and the horizontal distance is less than 0.2 mm, and the position of the wire clamp movable part (15) and the wire clamp fixed part (16) of the wire clamp (7) can adapt to the splitter (5) with a length of 16 to 25 mm.
7. A chip wire bonding process head according to claim 5, characterized in that: The angle between the welding wire 2 (17) at the tip of the wire clamp (7) and the tip of the splitter (5) is forty-five degrees. The angle of the welding wire 2 (17) at the tip of the wire clamp (7) is constrained by the wire clamp movable part (15) of the wire clamp (7). The upper end of the wire passing hose part (18) is fixedly connected to the wire clamp fixed part (16) of the wire clamp (7) through the wire passing hose upper end fixing part (19). The lower end of the wire passing hose part (18) is fixedly connected to the wire clamp movable part (15) of the wire clamp (7) through the wire passing hose lower end fixing part (20). The wire passing hose part (18) is used for convenient disassembly, assembly and maintenance.