Bonding equipment support structure for preventing lead frame from sinking downwards

Abstract

The utility model discloses a bonding equipment support structure for preventing a lead frame from sinking downwards, which comprises a heating block for heating the lead frame and a plurality of detachable support seats on the heating block, the support seats are rotatably provided with support rollers, the support rollers are used for supporting the lead frame, and the outer circular surfaces of the upper ends of the support rollers protrude out of the upper surface of the heating block. According to the utility model, the middle part of the lead frame is supported by using the supporting roller, so that the middle part of the lead frame can be prevented from being sunken in the heating process, the lead frame is kept flat, and the bonding precision and quality are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor equipment, in particular to a bonding equipment lead frame anti-sag support structure. Background Art

[0002] As the chip carrier of the integrated circuit, the lead frame is a key structural component that uses bonding materials (metal wires) to achieve electrical connection between the internal circuit lead ends of the chip and the external leads to form an electrical circuit.

[0003] The process of welding the two ends of a metal wire to a lead frame and a chip respectively by means of a bonding device is called bonding. During the bonding process, the lead frame is heated by means of a heating block on the bonding device, thereby facilitating the bonding of the metal wire. However, during the heating process, some lead frames with a larger width and a softer material may have the problem of the middle portion of the lead frame sag downward due to thermal expansion, thereby affecting the bonding accuracy and quality. Utility Model Content

[0004] The utility model aims at solving the deficiencies in the prior art and provides a support structure for preventing the lead frame of a bonding device from sinking. The support roller is used to support the middle part of the lead frame, so as to avoid the middle part of the lead frame from sinking during the heating process, thereby keeping the lead frame flat and ensuring the accuracy and quality of bonding.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bonding equipment lead frame anti-sag support structure comprises a heating block for heating the lead frame, at least one supporting roller is rotatably provided on the heating block, the supporting roller is used to support the lead frame, the outer circular surface of the upper end of the supporting roller protrudes from the upper surface of the heating block, and when working, the outer circular surface of the upper end of the supporting roller rolls in contact with the lower surface of the middle part of the lead frame.

[0007] At least one supporting roller for supporting the lead frame is arranged on the heating block, and the outer cylindrical surface of the upper end of the supporting roller protrudes from the upper surface of the heating block. When working, the outer cylindrical surface of the upper end of the supporting roller rolls with the lower surface of the middle part of the lead frame, so that the middle part of the lead frame is supported by the supporting roller, which can avoid the middle part of the lead frame from sinking during the heating process, so that the lead frame remains flat, and the bonding accuracy and quality are guaranteed.

[0008] As a preferred solution, at least one detachable support seat is further provided on the heating block, and the support roller is rotatably disposed on the support seat.

[0009] As a preferred solution, a movable groove is provided on the support seat, and the support roller is rotatably disposed in the movable groove via a rotating shaft. Shaft holes are provided on both sides of the movable groove, and both ends of the rotating shaft are rotatably disposed in corresponding shaft holes.

[0010] As a preferred solution, the movable groove passes through the upper and lower surfaces of the support seat, the axial hole passes through the lower surface of the support seat, and a removable baffle is provided on the lower surface of the support seat, and the baffle is blocked below the axial hole to limit the rotating shaft from disengaging from the axial hole downward.

[0011] As a preferred solution, a notch corresponding to the movable groove is provided on the baffle, and the outer circumferential surface of the lower end of the supporting roller can extend downward through the notch.

[0012] As a preferred solution, the support seat includes a mounting portion and a connecting portion which are integrally formed, the mounting portion is detachably mounted on the heating block, the movable groove is arranged on the connecting portion, and the baffle is detachably mounted on the lower surface of the connecting portion.

[0013] As a preferred solution, the upper surface of the heating block is provided with a positioning installation groove corresponding to the support seat one by one, and the support seat can be detachably installed in the positioning installation groove.

[0014] As a preferred solution, a avoidance groove is provided at the bottom of the positioning and mounting groove, and the outer cylindrical surface of the lower end of the supporting roller can extend into the avoidance groove.

[0015] As a preferred solution, the support roller is formed of a high-strength and high-rigidity metal material.

[0016] As a preferred solution, a plurality of the support rollers are provided, and the plurality of support rollers are arranged in a straight line and spaced apart in the middle of the heating block.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, at least one supporting roller for supporting the lead frame is arranged on the heating block, and the outer cylindrical surface of the upper end of the supporting roller protrudes from the upper surface of the heating block. When working, the outer cylindrical surface of the upper end of the supporting roller rolls in contact with the lower surface of the middle part of the lead frame, so that the middle part of the lead frame is supported by the supporting roller, which can avoid the middle part of the lead frame from sinking during the heating process, so that the lead frame remains flat, and the bonding accuracy and quality are guaranteed.

[0018] In order to more clearly explain the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly structure of an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the heating block structure of an embodiment of the utility model;

[0021] Figure 3 It is a side view of the assembly of the support seat and the support roller of the embodiment of the utility model;

[0022] Figure 4 It is an exploded schematic diagram of the support base and the support roller of the embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of the state in which the support roller supports the lead frame according to the embodiment of the utility model.

[0024] Description of the accompanying drawings:

[0025] 10-heating block 11-positioning installation groove 12-avoidance groove

[0026] 20-support roller 21-support seat 211-installation part

[0027] 212-connecting part 22-movable groove 23-rotating shaft

[0028] 24- shaft hole 25- baffle 251- notch

[0029] 26-first screw 30-lead frame DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] like Figure 1-5As shown, the utility model discloses a bonding equipment anti-concave support structure of the lead frame 30, including a heating block 10 for heating the lead frame 30, at least one supporting roller 20 is rotatably provided on the heating block 10, and the supporting roller 20 is used to support the lead frame 30. The outer circular surface of the upper end of the supporting roller 20 protrudes from the upper surface of the heating block 10. When working, the outer circular surface of the upper end of the supporting roller 20 rolls in contact with the lower surface of the middle part of the lead frame 30.

[0033] The heating block 10 is also provided with at least one detachable support seat 21, and the support roller 20 is rotatably provided on the support seat 21; by providing the detachable support seat 21, the support roller 20 can be installed on the support seat 21 first, and then the support seat 21 can be installed on the heating block 10, which is convenient for assembly.

[0034] The support seat 21 is provided with a movable groove 22 , and the support roller 20 is rotatably disposed in the movable groove 22 via a rotating shaft 23 . Both sides of the movable groove 22 are provided with shaft holes 24 , and both ends of the rotating shaft 23 are rotatably disposed in the corresponding shaft holes 24 .

[0035] The movable groove 22 passes through the upper and lower surfaces of the support seat 21, the shaft hole 24 passes through the lower surface of the support seat 21, and a removable baffle 25 is provided on the lower surface of the support seat 21. The baffle 25 is blocked below the shaft hole 24 to limit the shaft 23 from disengaging downward from the shaft hole 24; by setting the shaft hole 24 to pass through the lower surface of the support seat 21, and setting the removable baffle 25, during assembly, the support roller 20 can be first sleeved on the shaft 23, so that the support roller 20 remains stable relative to the shaft 23, and then the two ends of the shaft 23 are installed from bottom to top into the corresponding shaft holes 24, and the support roller 20 is installed in the movable groove 22, and then the baffle 25 is assembled to the lower surface of the support seat 21, and the support roller 20 is easy to assemble and disassemble.

[0036] The baffle plate 25 is provided with a notch 251 corresponding to the movable groove 22, and the outer cylindrical surface of the lower end of the support roller 20 can extend downward through the notch 251; by providing the notch 251 corresponding to the movable groove 22 on the baffle plate 25, the outer cylindrical surface of the lower end of the support roller 20 can extend downward through the notch 251, thereby reducing the height of the support roller 20 relative to the support seat 21, and further making the assembly structure of the support roller 20 and the support seat 21 more compact and small in size.

[0037] The support seat 21 includes an integrally formed mounting portion 211 and a connecting portion 212, the mounting portion 211 is detachably mounted on the heating block 10, the movable groove 22 is arranged on the connecting portion 212, and the baffle 25 is detachably mounted on the lower surface of the connecting portion 212. Specifically, the baffle 25 is mounted on the connecting portion 212 by a first screw 26, and the mounting portion 211 is detachably mounted on the heating block 10 by a second screw (not shown). It can be understood that the mounting portion 211 can also be detachably mounted on the heating block 10 by a snap-fit ​​manner, and the baffle 25 can also be detachably mounted on the lower surface of the connecting portion 212 by a snap-fit ​​manner; by adopting the integrally formed mounting portion 211 and the connecting portion 212, the support seat 21 is detachably mounted on the heating block 10 by the mounting portion 211, the movable groove 22 and the baffle 25 are arranged on the connecting portion 212, the structural layout is reasonable, the integrally formed structure is stable, and it can be processed and formed in one go.

[0038] The upper surface of the heating block 10 is provided with a positioning installation groove 11 corresponding to the support seat 21, and the support seat 21 can be detachably installed in the positioning installation groove 11; by setting the positioning installation groove 11 and utilizing the positioning function of the positioning installation groove 11, the installation accuracy of the support seat 21 is provided, and the installation of the support seat 21 is also facilitated, thereby improving the installation efficiency.

[0039] An avoidance groove 12 is provided at the bottom of the positioning and mounting groove 11, and the outer cylindrical surface of the lower end of the support roller 20 can extend into the avoidance groove 12; by setting the avoidance groove 12, during assembly, the outer cylindrical surface of the lower end of the support roller 20 extends into the avoidance groove 12, thereby reducing the height of the support roller 20, making the assembly structure of the support roller 20, the support seat 21 and the heating block 10 more compact and occupying less space.

[0040] The support roller 20 is formed of a high-strength and high-rigidity metal material. Exemplarily, the support roller 20 can be made of aluminum alloy or stainless steel. By using the support roller 20 formed of a high-strength and high-rigidity metal material, the support roller 20 has sufficient strength and rigidity. During the process of heating the lead frame 30, the support roller 20 can resist deformation caused by temperature changes, thereby stably supporting the lead frame 30.

[0041] A plurality of the supporting rollers 20 are provided, and the plurality of supporting rollers 20 are arranged in a straight line and spaced apart in the middle of the heating block 10 along the moving direction of the lead frame 30 .

[0042] It should be noted that the support rollers 20 of the present invention are arranged in a single row. It is understandable that the support rollers 20 may also be arranged in multiple rows.

[0043] The working principle of the utility model is as follows: an external material moving device (not shown) drives the lead frame 30 to pass over the heating block 10. During the movement of the lead frame 30, the heating block 10 heats the lead frame 30. At the same time, the outer cylindrical surface of the upper end of the supporting roller 20 abuts against the lower surface roller in the middle of the lead frame 30.

[0044] In summary, the utility model provides at least one supporting roller 20 for supporting the lead frame 30 on the heating block 10, and the outer cylindrical surface of the upper end of the supporting roller 20 protrudes from the upper surface of the heating block 10. When working, the outer cylindrical surface of the upper end of the supporting roller 20 rolls with the lower surface of the middle part of the lead frame 30, so that the middle part of the lead frame 30 is supported by the supporting roller 20, which can avoid the middle part of the lead frame 30 from sinking during the heating process, so that the lead frame 30 remains flat, and the bonding accuracy and quality are guaranteed.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical practice of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A bonding equipment lead frame anti-sag support structure, comprising a heating block for heating the lead frame, characterized in that: At least one supporting roller is rotatably provided on the heating block, and the supporting roller is used to support the lead frame. The outer circular surface of the upper end of the supporting roller protrudes from the upper surface of the heating block. When working, the outer circular surface of the upper end of the supporting roller rolls in contact with the lower surface of the middle part of the lead frame.

2. The bonding equipment lead frame anti-sag support structure according to claim 1, characterized in that: The heating block is also provided with at least one detachable support seat, and the support roller is rotatably disposed on the support seat.

3. The bonding equipment lead frame anti-sag support structure according to claim 2, characterized in that: The support seat is provided with a movable groove, the support roller is rotatably arranged in the movable groove via a rotating shaft, shaft holes are arranged on both sides of the movable groove, and both ends of the rotating shaft are rotatably arranged in the corresponding shaft holes.

4. The bonding equipment lead frame anti-sag support structure according to claim 3, characterized in that: The movable groove passes through the upper and lower surfaces of the support seat, the shaft hole passes through the lower surface of the support seat, and a detachable baffle is provided on the lower surface of the support seat. The baffle is blocked below the shaft hole to limit the rotating shaft from disengaging from the shaft hole downward.

5. The bonding equipment lead frame anti-sag support structure according to claim 4, characterized in that: The baffle is provided with a notch corresponding to the movable groove, and the outer circumferential surface of the lower end of the supporting roller can extend downward through the notch.

6. The bonding equipment lead frame anti-sag support structure according to claim 4, characterized in that: The support seat comprises an integrally formed mounting portion and a connecting portion, the mounting portion is detachably mounted on the heating block, the movable groove is arranged on the connecting portion, and the baffle is detachably mounted on the lower surface of the connecting portion.

7. The bonding equipment lead frame anti-sag support structure according to claim 1, characterized in that: The upper surface of the heating block is provided with a positioning installation groove corresponding to the support seat one by one, and the support seat can be detachably installed in the positioning installation groove.

8. The bonding equipment lead frame anti-sag support structure according to claim 7, characterized in that: The bottom of the positioning installation groove is provided with an avoidance groove, and the outer circular surface of the lower end of the supporting roller can extend into the avoidance groove.

9. The bonding equipment lead frame anti-sag support structure according to claim 1, characterized in that: The supporting roller is formed of a high-strength and high-rigidity metal material.

10. The bonding equipment lead frame anti-sag support structure according to any one of claims 1 to 9, characterized in that: A plurality of the supporting rollers are provided, and the plurality of supporting rollers are arranged in a straight line and spaced apart in the middle of the heating block.

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