Chip wire bonding wire stretcher

Abstract

This utility model discloses a wire tensioner for chip wire bonding. By drawing air through the vent, and due to the gap between the bottom of the vent groove and the end face of the second end of the wire tube, the vent connects to the interior of the wire tube. The welding wire at the first end of the wire tube is drawn into the tube under suction and, under inertia, enters the outlet tube assembly, where it extends out at the second end, thus completing the wire threading operation. By blowing air into the vent, gas enters the wire tube and exits from the first end. The welding wire floats under the airflow, preventing it from contacting the inner wall of the wire tube and ensuring it remains taut. This also reduces friction between the wire and the inner wall of the wire tube. Therefore, the wire threading operation is more convenient and work efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of chip processing technology, specifically to a wire tensioner for chip wire bonding. Background Technology

[0002] Wire bonding uses solder wire as a bridge to achieve metal-to-metal connection between chip pads and substrate pads through hot pressing, ultrasonic waves, or thermo-ultrasonic energy, thus completing the transmission of electrical signals.

[0003] In wire bonding, the welding wire is usually wound on a spool. After the welding wire extends from the spool, it needs to pass through a tensioner. The function of the tensioner is to tighten the welding wire and ensure that the welding is carried out smoothly.

[0004] Existing wire tensioners have complex structures, and the operation of passing the welding wire through the tensioner is cumbersome and inefficient. Utility Model Content

[0005] The purpose of this invention is to provide a wire tensioner for chip wire bonding, which effectively solves the technical problems of cumbersome operation and low efficiency in passing the wire through the tensioner.

[0006] To address the aforementioned issues, this utility model discloses a wire tensioner for chip wire bonding, comprising an air passage tube, a wire passage tube, a pad tube, and an outlet tube assembly.

[0007] The gas passage tube is sleeved outside the welding wire passage tube, and the length of the gas passage tube is longer than the length of the welding wire passage tube. The first end of the gas passage tube is aligned with the first end of the welding wire passage tube, and the welding wire enters from the first end of the welding wire passage tube. The pad tube is located at the aligned end of the gas passage tube and the welding wire passage tube. The outlet tube assembly is located at the second end of the welding wire passage tube, and the first end of the outlet tube assembly is inserted into the welding wire passage tube. The outer diameter of the welding wire passage tube is smaller than the inner diameter of the gas passage tube. The outer diameter of the pad tube is equal to the inner diameter of the gas passage tube and is a transition fit. The inner diameter of the cable is equal to the outer diameter of the welding wire tube and is a transition fit; the outer diameter of the cable outlet assembly is equal to the inner diameter of the air passage pipe and is a transition fit; the inner diameter of the first end of the cable outlet assembly is equal to the outer diameter of the welding wire tube and is a transition fit; a venting groove is provided on the side wall of the first end of the cable outlet assembly; there is a gap between the bottom of the venting groove and the end face of the second end of the welding wire tube; a vent is provided on the air passage pipe; the vent is located between the pad tube and the second end of the air passage pipe; the vent is used for blowing or evacuating air; and the second end of the cable outlet assembly is used to extend the welding wire.

[0008] Optionally, the outlet pipe assembly includes a welding wire outlet pipe and a branch pipe;

[0009] The inner diameter of the branch pipe is the same as the inner diameter of the first end of the outlet pipe assembly, and the inner diameter of the welding wire outlet pipe is the same as the inner diameter of the second end of the outlet pipe assembly. The outer diameters of the branch pipe and the welding wire outlet pipe are the same as the outer diameter of the outlet pipe assembly. The outlet end of the welding wire outlet pipe is a tapered structure, and the inner diameter of the welding wire outlet pipe passes through the axis of the tapered structure. The other end of the welding wire outlet pipe is fixedly connected to the end face of one end of the branch pipe, and the other end of the branch pipe is provided with the vent groove.

[0010] Optionally, multiple ventilation slots are provided, and the multiple ventilation slots are evenly arranged along the circumferential direction of the branch pipe. The opening of the ventilation slot faces the end face of the other end of the branch pipe, and the distance from which the branch pipe is inserted into the welding wire pipe is less than the length of the ventilation slot.

[0011] Optionally, the welding wire outlet pipe and the branch pipe are fixedly connected by adhesive, and the air passage pipe and the gasket pipe are fixedly connected by adhesive.

[0012] Optionally, the first end of the welding wire conduit has a flared opening structure.

[0013] Optionally, the second end of the gas pipe at least partially covers the welding wire outlet pipe, and the second end of the gas pipe is provided with an injection port. The injection port is opened on the gas pipe and corresponds to the connection between the welding wire outlet pipe and the branch pipe. The injection port is used to inject adhesive at the connection between the welding wire outlet pipe and the branch pipe.

[0014] Optionally, a protective tube is also included, which is sleeved on the outside of the air passage pipe. The inner diameter of the protective tube is equal to the outer diameter of the air passage pipe and is clearance-fitted. The length of the protective tube is less than the length of the air passage pipe. The protective tube is provided with a clearance opening to avoid the air vent on the air passage pipe. The protective tube and the air passage pipe are fixed by adhesive bonding.

[0015] Beneficial effects:

[0016] This utility model discloses a wire tensioner for chip wire bonding, comprising a gas path tube, a wire passage tube, a pad tube, and an outlet tube assembly. The gas path tube is sleeved outside the wire passage tube, and its length is longer than that of the wire passage tube. The first end of the gas path tube is aligned with the first end of the wire passage tube, and the wire enters through the first end of the wire passage tube. The pad tube is located at the aligned end of the gas path tube and the wire passage tube. The outlet tube assembly is located at the second end of the wire passage tube, and its first end is inserted into the wire passage tube. The outer diameter of the wire passage tube is smaller than the inner diameter of the gas path tube. The outer diameter of the pad tube is... The inner diameter of the gas pipe is equal to the outer diameter of the welding wire tube and is a transition fit; the inner diameter of the pad tube is equal to the outer diameter of the welding wire tube and is a transition fit; the outer diameter of the outlet tube assembly is equal to the inner diameter of the gas pipe and is a transition fit; the inner diameter of the first end of the outlet tube assembly is equal to the outer diameter of the welding wire tube and is a transition fit; a vent groove is provided on the side wall of the first end of the outlet tube assembly; there is a gap between the bottom of the vent groove and the end face of the second end of the welding wire tube; a vent is provided on the gas pipe; the vent is located between the pad tube and the second end of the gas pipe; the vent is used for blowing or evacuating air; the second end of the outlet tube assembly is used to extend the welding wire.

[0017] By drawing air through the vent, a gap exists between the bottom of the vent groove and the end face of the second end of the welding wire tube, connecting the vent to the interior of the welding wire tube. The welding wire at the first end of the welding wire tube is drawn into the tube under suction and, due to inertia, enters the outlet tube assembly, extending out at the second end of the assembly, thus completing the wire threading operation of the welding wire tensioner. Blowing air into the vent allows gas to enter the welding wire tube and exit from the first end. The welding wire floats under the airflow, preventing it from contacting the inner wall of the tube and ensuring it remains taut. This also reduces friction between the wire and the inner wall of the tube. Therefore, the wire threading operation of the tensioner is more convenient and work efficiency is improved. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is an exploded schematic diagram of the welding wire tensioner disclosed in this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure disclosed in this utility model;

[0021] Figure 3 This is a schematic diagram of the welding wire conduit and cable outlet assembly disclosed in this utility model;

[0022] Figure 4 This is a schematic diagram of the branch pipe structure disclosed in this utility model;

[0023] Figure 5 This is a schematic diagram of the welding wire outlet tube structure disclosed in this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Gas pipe; 11. Vent; 12. Glue injection port; 2. Welding wire pipe; 3. Gasket; 4. Outlet pipe assembly; 41. Vent groove; 42. Welding wire outlet pipe; 43. Branch pipe; 5. Protective pipe; 51. Clearance opening. Detailed Implementation

[0026] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solution of this utility model will be further illustrated below through specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The content of the embodiments does not constitute a limitation on this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figures 1-5As shown, this utility model discloses a wire tensioner for chip wire bonding. The function of the wire tensioner is to tighten the wire. It includes an air passage pipe 1, a wire passage pipe 2, a pad pipe 3, and an outlet pipe assembly 4.

[0030] Among them, such as Figure 1 As shown, the gas pipe 1 is sleeved outside the welding wire passage pipe 2, and the length of the gas pipe 1 is longer than the length of the welding wire passage pipe 2. The first end of the gas pipe 1 is aligned with the first end of the welding wire passage pipe 2. The gasket 3 is located between the gas pipe 1 and the welding wire passage pipe 2, specifically at the aligned ends of the gas pipe 1 and the welding wire passage pipe 2. The outlet pipe assembly 4 is located at the second end of the welding wire passage pipe 2, and the first end of the outlet pipe assembly 4 is inserted into the welding wire passage pipe 2. The outer diameter of the welding wire passage pipe 2 is smaller than the inner diameter of the gas pipe 1. The outer diameter of the gasket 3 is equal to the inner diameter of the gas pipe 1 and is a transition fit. The inner diameter of the gasket 3 is equal to the outer diameter of the welding wire passage pipe 2 and is a transition fit. The outer diameter of the outlet pipe assembly 4 is equal to the inner diameter of the gas pipe 1 and is a transition fit. The inner diameter of the first end of the outlet pipe assembly 4 is equal to the outer diameter of the welding wire passage pipe 2 and is a transition fit. A vent groove 41 is provided on the side wall of the first end of the cable outlet assembly 4. There is a gap between the bottom of the vent groove 41 and the end face of the second end of the welding wire tube 2, so that the airflow between the gas passage pipe 1 and the welding wire tube 2 can enter and exit into the welding wire tube 2. A vent 11 is provided on the gas passage pipe 1. The vent 11 is located between the pad pipe 3 and the second end of the gas passage pipe 1, that is, the radial projection of the vent 11 does not intersect with the pad pipe 3. The vent 11 is used for blowing or evacuating air. The airflow does not flow to the first end of the gas passage pipe 1 due to the obstruction of the pad pipe 3, but flows to the second end of the gas passage pipe 1, and enters and exits into the welding wire tube 2 through the bottom of the vent groove 41.

[0031] The second end of the outlet tube assembly 4 is the welding wire outlet end, and the inner diameter of the second end of the outlet tube assembly 4 ranges from 0.01mm to 1mm.

[0032] This application utilizes air extraction through the vent 11. Due to the gap between the bottom of the vent groove 41 and the end face of the second end of the welding wire tube 2, the vent 11 connects to the interior of the welding wire tube 2. The welding wire at the first end of the welding wire tube 2 is drawn into the tube under suction and, under inertia, enters the outlet tube assembly 4, extending from the second end of the assembly 4, thus completing the wire threading operation of the welding wire tensioner. By blowing air into the vent 11, gas enters the welding wire tube 2 and exits from the first end. The welding wire floats under the airflow, preventing it from contacting the inner wall of the welding wire tube 2, ensuring the wire remains taut, and reducing friction between the wire and the inner wall of the tube 2. This makes the wire threading operation of the welding wire tensioner more convenient and improves work efficiency.

[0033] Preferred, such as Figures 3-5As shown, the outlet pipe assembly 4 includes a welding wire outlet pipe 42 and a branch pipe 43. The inner diameter of the branch pipe 43 is the inner diameter of the first end of the outlet pipe assembly 4, that is, the inner diameter of the branch pipe 43 is equal to the outer diameter of the welding wire through pipe 2 and is a transition fit. The inner diameter of the welding wire outlet pipe 42 is the inner diameter of the second end of the outlet pipe assembly 4, that is, the inner diameter of the welding wire outlet pipe 42 is in the range of 0.01mm-1mm.

[0034] The wire exit tube 42 has a tapered end, with its inner diameter extending through the axis of the tapered structure. The other end of the wire exit tube 42 is fixedly connected to the end face of one end of the branch pipe 43. The other end of the branch pipe 43 is provided with the aforementioned venting groove 41. Multiple venting grooves 41 are evenly arranged along the circumferential direction of the branch pipe 43. In this application, four venting grooves 41 are provided, evenly arranged along the circumferential direction of the branch pipe 43. The opening of the venting groove 41 faces the end face of the other end of the branch pipe 43, and the venting groove 41 extends axially along the branch pipe 43. The distance between the bottom of the venting groove 41 and its opening is not specifically limited in this application. The distance from the branch pipe 43 to the wire passage tube 2 is less than the length of the venting groove 41, thus creating a gap between the bottom of the wire passage tube 2 and the venting groove 41, allowing gas to enter and exit normally.

[0035] Furthermore, the welding wire outlet tube 42 and the branch tube 43 are connected and fixed by adhesive. In some other embodiments, they can also be connected and fixed by welding, or the welding wire outlet tube 42 and the branch tube 43 can be integrally formed.

[0036] In this application, the gas pipe 1 and the gasket 3 are also fixedly connected by adhesive. Specifically, adhesive is applied to the inner wall of the gas pipe 1 and / or the outer wall of the gasket 3 to bond the gas pipe 1 and the gasket 3 together.

[0037] The welding wire tube 2 is directly inserted into the gas line tube 1 without using adhesive or other fixing methods. Furthermore, by not using adhesive or other fixing methods, the welding wire tube 2 can be easily removed as needed. Since the welding wire tube 2 passes through the welding wire during actual production, it will accumulate dust and other dirt over time, requiring frequent cleaning. Quick removal facilitates cleaning of the welding wire tube 2.

[0038] Preferably, the first end of the welding wire tube 2 has a flared opening structure, that is, the diameter of the opening at the first end of the welding wire tube 2 is larger than the inner diameter of the welding wire tube 2, so that the welding wire can enter the welding wire tube 2 more quickly and accurately.

[0039] Preferably, the second end of the gas pipe 1 is provided with an adhesive injection port 12, which is used to inject adhesive at the connection between the welding wire outlet pipe 42 and the branch pipe 43, so that the connection is adhesively bonded. The sum of the lengths of the welding wire through pipe 2 and the outlet pipe assembly 4 is greater than the length of the gas pipe 1. The second end of the gas pipe 1 partially covers the welding wire outlet pipe 42, and the adhesive injection port 12 is opened on the gas pipe 1 and corresponds to the connection between the welding wire outlet pipe 42 and the branch pipe 43.

[0040] This invention first inserts the welding wire passage tube 2, the branch pipe 43, and the welding wire outlet tube 42 into the gas line pipe 1, and then applies adhesive to the connection between the welding wire outlet tube 42 and the branch pipe 43. This ensures the coaxiality of the welding wire outlet tube 42 and the branch pipe 43, avoiding poor coaxiality caused by pre-gluing the welding wire outlet tube 42 and the branch pipe 43, which would affect subsequent operations.

[0041] Preferably, this application further includes a protective tube 5, which is sleeved on the outside of the air passage pipe 1. The inner diameter of the protective tube 5 is equal to the outer diameter of the air passage pipe 1 and is clearance-fitted. The length of the protective tube 5 is less than the length of the air passage pipe 1. The protective tube 5 has a clearance opening 51 to avoid the air vent 11 on the air passage pipe 1. The clearance opening 51 and the air vent 11 overlap radially. The protective tube 5 and the air passage pipe 1 are fixed together by adhesive bonding. The protective tube 5 does not overlap with the glue injection port 12, that is, the protective tube 5 does not cover the glue injection port 12.

[0042] The applicant declares that the above are only specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model fall within the protection and disclosure scope of this utility model.

Claims

1. A wire tensioner for chip wire bonding, characterized in that, It includes a gas pipe (1), a welding wire tube (2), a gasket (3), and an outlet pipe assembly (4). The gas pipe (1) is sleeved outside the welding wire tube (2), and the length of the gas pipe (1) is longer than the length of the welding wire tube (2). The first end of the gas pipe (1) is aligned with the first end of the welding wire tube (2). The welding wire enters from the first end of the welding wire tube (2). The pad tube (3) is located at the end of the gas pipe (1) and the welding wire tube (2) that are aligned. The wire outlet assembly (4) is located at the second end of the welding wire tube (2), and the first end of the wire outlet assembly (4) is inserted into the welding wire tube (2). The outer diameter of the welding wire tube (2) is smaller than the inner diameter of the gas pipe (1). The outer diameter of the pad tube (3) is equal to the inner diameter of the gas pipe (1) and is a transition fit. The inner diameter of the wire passage tube (2) is equal to the outer diameter of the wire passage tube (2) and is a transition fit. The outer diameter of the wire outlet tube assembly (4) is equal to the inner diameter of the air passage tube (1) and is a transition fit. The inner diameter of the first end of the wire outlet tube assembly (4) is equal to the outer diameter of the wire passage tube (2) and is a transition fit. A ventilation groove (41) is provided on the side wall of the first end of the wire outlet tube assembly (4). There is a gap between the bottom of the ventilation groove (41) and the end face of the second end of the wire passage tube (2). A ventilation port (11) is provided on the air passage tube (1). The ventilation port (11) is located between the pad tube (3) and the second end of the air passage tube (1). The ventilation port (11) is used for blowing or evacuating air. The second end of the wire outlet tube assembly (4) is used to extend the wire.

2. The wire tensioner for chip wire bonding according to claim 1, characterized in that, The outlet pipe assembly (4) includes a welding wire outlet pipe (42) and a branch pipe (43). The inner diameter of the branch pipe (43) is the inner diameter of the first end of the outlet pipe assembly (4), the inner diameter of the welding wire outlet pipe (42) is the inner diameter of the second end of the outlet pipe assembly (4), the outer diameter of the branch pipe (43) and the outer diameter of the welding wire outlet pipe (42) are the same as the outer diameter of the outlet pipe assembly (4), the outlet end of the welding wire outlet pipe (42) is a conical structure, and the inner diameter of the welding wire outlet pipe (42) passes through the axis of the conical structure; the other end of the welding wire outlet pipe (42) is fixedly connected to the end face of one end of the branch pipe (43), and the other end of the branch pipe (43) is provided with the ventilation groove (41).

3. The wire tensioner for chip wire bonding according to claim 2, characterized in that, The ventilation groove (41) is provided in multiple ways. The multiple ventilation grooves (41) are evenly arranged along the circumferential direction of the branch pipe (43). The opening of the ventilation groove (41) faces the end face of the other end of the branch pipe (43). The distance from which the branch pipe (43) is inserted into the welding wire pipe (2) is less than the length of the ventilation groove (41).

4. The wire tensioner for chip wire bonding according to claim 2, characterized in that, The welding wire outlet pipe (42) and the branch pipe (43) are fixedly connected by adhesive, and the air pipe (1) and the pad pipe (3) are fixedly connected by adhesive.

5. The wire tensioner for chip wire bonding according to claim 1, characterized in that, The first end of the welding wire tube (2) has a trumpet-shaped opening structure.

6. The wire tensioner for chip wire bonding according to claim 4, characterized in that, The second end of the gas pipe (1) at least partially covers the welding wire outlet pipe (42). The second end of the gas pipe (1) is provided with an injection port (12). The injection port (12) is opened on the gas pipe (1) and corresponds to the connection between the welding wire outlet pipe (42) and the branch pipe (43). The injection port (12) is used to inject glue at the connection between the welding wire outlet pipe (42) and the branch pipe (43).

7. The wire tensioner for chip wire bonding according to claim 1, characterized in that, It also includes a protective tube (5), which is sleeved on the outside of the air passage pipe (1). The inner diameter of the protective tube (5) is equal to the outer diameter of the air passage pipe (1) and is clearance fit. The length of the protective tube (5) is less than the length of the air passage pipe (1). The protective tube (5) is provided with a clearance opening (51) to avoid the air inlet (11) on the air passage pipe (1). The protective tube (5) and the air passage pipe (1) are fixed by adhesive bonding.

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