Device for controlling radian of bonding lead

Abstract

The utility model relates to a device for controlling the radian of a bonding lead, which comprises a supporting seat and a supporting mechanism arranged on the supporting seat, the supporting seat comprises two same long-strip-shaped upright posts, a space is arranged between the long-strip-shaped upright posts for installing the supporting mechanism, the supporting mechanism consists of two connecting rods, a height adjusting device and a limiting strip, and the height adjusting device is arranged on the limiting strip. The two connecting rods are transversely installed on the top faces of the two long-strip-shaped stand columns respectively, a limiting strip is arranged between the two connecting rods, the two ends of the limiting strip are connected with the two connecting rods through height adjusting devices respectively, and the vertical height of the limiting strip is adjusted through the height adjusting devices. Therefore, the radian required by the bonding lead placed on the limiting strip is controlled, and the two ends of the bonding lead are installed on the bonding area. The device provided by the utility model can effectively control the radian of the lead wire, so that each aluminum wire reaches an ideal radian, thereby prolonging the service life and improving the function of a packaging module, and reducing the module failure caused by short circuit between different electrodes at the same time.

Description

Technical Field

[0001] The utility model belongs to the field of semiconductor packaging, relates to power semiconductor packaging, and in particular to a device for controlling the curvature of a bonding lead. Background Art

[0002] Wire bonding is a process technology that uses heat, pressure, and ultrasonic energy to connect the pins of semiconductor chips to the I / O leads of electronic packaging shells or technical wiring on substrates with metal filaments. The curvature of the lead after bonding plays a key role in the life and function of the packaging module. The existing bonding equipment has a poor control effect on the curvature of the lead. After bonding, the ideal curvature of the lead cannot be obtained, resulting in a short life and poor function of the packaging module, and even failure problems such as conduction and short circuit between different poles. To this end, a device for controlling the curvature of the bonding lead is designed to overcome the above problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a device for controlling the curvature of bonding leads which has a simple and reasonable structure and is easy to use. The device can effectively control the curvature of the leads so that each aluminum wire reaches an ideal curvature, thereby improving the life and function of the packaging module and reducing module failures caused by short circuits between different poles.

[0004] The utility model is realized through the following technical scheme: a device for controlling the curvature of a bonding lead, comprising a support base and a support mechanism installed on the support base, wherein the support base is two identical long strip columns, a spacing is provided between the long strip columns for installing the support mechanism, the support mechanism is composed of two connecting rods, a height adjustment device and a limit bar, the two connecting rods are respectively installed horizontally on the top surfaces of the two long strip columns, a limit bar is provided between the two connecting rods, the two ends of the limit bar are respectively connected to the two connecting rods through the height adjustment device, the vertical height of the limit bar is adjusted by the height adjustment device, so as to control the curvature required for the bonding lead placed on the limit bar, and the two ends of the bonding lead are respectively installed on the bonding area.

[0005] Preferably, the height adjustment device consists of a height adjustment structure shell, a fixed rod and a movable rod, one end of the height adjustment structure shell is fixedly connected to the limit bar through the fixed rod, the other end of the height adjustment structure shell is inserted and installed with a movable rod, and a through hole is provided on the side of the height adjustment structure shell, an adjusting screw is inserted and installed in the through hole, the end of the movable rod away from the height adjustment structure shell is connected to the connecting rod, when the adjusting screw is loosened, the movable rod can move up and down in the height adjustment structure shell to realize the vertical height adjustment of the limit bar, and when the adjusting screw is tightened, the adjusting screw presses against the movable rod, so that the movable rod is fixed.

[0006] Preferably, the length of the movable rod is greater than the length of the height adjustment structure shell, so that after the movable rod is inserted into the height adjustment structure shell, part of it is exposed outside the height adjustment structure shell, and the end of the movable rod inserted into one side of the height adjustment structure shell is an inverted trapezoidal structure, thereby facilitating the installation and disassembly of the movable rod.

[0007] Preferably, the movable rod and the height adjustment structure housing, the movable rod and the connecting rod, and the fixed rod and the limiting strip are fixed by bolts, so as to facilitate installation and disassembly.

[0008] Preferably, the limiting strip is made of plastic or rubber.

[0009] Preferably, the bonding wire is aluminum wire bonding or copper wire bonding.

[0010] The beneficial effects of the utility model are as follows:

[0011] The device for controlling the curvature of the bonding lead of the utility model horizontally arranges a limit bar in the path crossed by the bonding lead. When the bonding lead falls, it will contact the limit bar. By changing the height of the limit bar, the required curvature of the bonding lead can be controlled. The curvature of the lead can be effectively controlled by the device so that each aluminum wire reaches an ideal curvature, thereby improving the life and function of the packaging module and reducing module failure caused by short circuits between different poles. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a front structural schematic diagram of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the height adjustment device in the utility model. DETAILED DESCRIPTION

[0015] In order to enable ordinary technicians in the field to more clearly understand the purpose, technical solutions and advantages of the utility model, the utility model is further explained below in conjunction with the accompanying drawings and embodiments.

[0016] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal" and "vertical" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or component referred to must have a specific direction and therefore should not be understood as a limitation on the present invention.

[0017] The utility model will be described in detail below with reference to the accompanying drawings: Figure 1 As shown, a device for controlling the curvature of a bonding lead comprises a support base 1 and a support mechanism installed on the support base 1, wherein the support base 1 is two identical long strip columns 3, and a spacing 4 is provided between the long strip columns 3 for installing the support mechanism, and the support mechanism is composed of two connecting rods 5, a height adjustment device and a limit bar 6, the two connecting rods 5 are respectively installed horizontally on the top surfaces of the two long strip columns 3, and a limit bar 6 is provided between the two connecting rods 5, and the two ends of the limit bar 6 are respectively connected to the two connecting rods 5 through the height adjustment device 2, and the vertical height of the limit bar 6 is adjusted by the height adjustment device 2, so as to control the curvature required for the bonding lead 7 placed on the limit bar 6, and the two ends of the bonding lead 7 are respectively installed on the bonding area 8.

[0018] The height adjustment device 2 is composed of a height adjustment structure shell 9, a fixed rod 10 and a movable rod 11. One end of the height adjustment structure shell 9 is fixedly connected to the limit bar 6 through the fixed rod 10, and the movable rod 11 is inserted and installed in the other end of the height adjustment structure shell 9, and a through hole 12 is provided on the side of the height adjustment structure shell 9, and an adjusting screw 13 is inserted and installed in the through hole 12. The end of the movable rod 11 away from the height adjustment structure shell 9 is connected to the connecting rod 5. When the adjusting screw 13 is loosened, the movable rod 11 can move up and down in the height adjustment structure shell 9 to realize the vertical height adjustment of the limit bar 6. When the adjusting screw 13 is tightened, the adjusting screw 13 presses against the movable rod 11, so that the movable rod 11 is fixed.

[0019] The length of the movable rod 11 is greater than the length of the height adjustment structure housing 9, so that after the movable rod 11 is inserted into the height adjustment structure housing 9, part of it is exposed outside the height adjustment structure housing 9, and the end of the movable rod 11 inserted into the height adjustment structure housing 9 is an inverted trapezoidal structure 14, so as to facilitate the installation and removal of the movable rod 11. The movable rod 11 and the height adjustment structure housing 9, the movable rod 11 and the connecting rod 5, and the fixed rod 10 and the limiting strip 6 are all fixed by bolts, which is convenient for installation and removal.

[0020] The limiting strip 6 is made of soft materials such as plastic or rubber, and its appearance shape is not fixed and changes with the required lead curvature. The surface must be smooth to ensure that the lead is not damaged when it contacts with the lead.

[0021] The bonding wire 7 is aluminum wire bonding or copper wire bonding, etc. The bonding wire may also include but is not limited to wire bonding between DBC and chip, wire bonding between chips, wire bonding between terminals and DBC, and wire bonding between terminals and chips, which is adjusted according to actual conditions.

[0022] The device for controlling the curvature of the bonding lead of the utility model horizontally arranges a limit bar in the path crossed by the bonding lead. When the bonding lead falls, it will contact the limit bar. By changing the height of the limit bar, the required curvature of the bonding lead can be controlled. The curvature of the lead can be effectively controlled by the device so that each aluminum wire reaches an ideal curvature, thereby improving the life and function of the packaging module and reducing module failure caused by short circuits between different poles.

[0023] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A device for controlling the curvature of a bonding wire, comprising a support base (1) and a support mechanism mounted on the support base (1), characterized in that: The support seat (1) is two identical long strip columns (3), and a spacing (4) is provided between the long strip columns (3) for installing a support mechanism. The support mechanism is composed of two connecting rods (5), a height adjustment device and a limit bar (6). The two connecting rods (5) are respectively installed horizontally on the top surfaces of the two long strip columns (3). A limit bar (6) is provided between the two connecting rods (5). The two ends of the limit bar (6) are respectively connected to the two connecting rods (5) through the height adjustment device (2). The vertical height of the limit bar (6) is adjusted through the height adjustment device (2), thereby controlling the required curvature of the bonding lead (7) placed on the limit bar (6), and the two ends of the bonding lead (7) are respectively installed on the bonding area (8).

2. The device for controlling the curvature of a bonding wire according to claim 1, characterized in that: The height adjustment device (2) is composed of a height adjustment structure shell (9), a fixed rod (10) and a movable rod (11). One end of the height adjustment structure shell (9) is fixedly connected to the limit bar (6) through the fixed rod (10), and the movable rod (11) is inserted and installed in the other end of the height adjustment structure shell (9). A through hole (12) is provided on the side of the height adjustment structure shell (9), and an adjusting screw (13) is inserted and installed in the through hole (12). The end of the movable rod (11) away from the height adjustment structure shell (9) is connected to the connecting rod (5). When the adjusting screw (13) is loosened, the movable rod (11) can move up and down in the height adjustment structure shell (9) to achieve vertical height adjustment of the limit bar (6). When the adjusting screw (13) is tightened, the adjusting screw (13) abuts against the movable rod (11), so that the movable rod (11) is fixed.

3. The device for controlling the curvature of a bonding wire according to claim 2, characterized in that: The length of the movable rod (11) is greater than the length of the height adjustment structure housing (9), so that after the movable rod (11) is inserted into the height adjustment structure housing (9), a portion of the movable rod (11) is exposed outside the height adjustment structure housing (9), and the end of the movable rod (11) inserted into one side of the height adjustment structure housing (9) is in an inverted trapezoidal structure (14), thereby facilitating installation and removal of the movable rod (11).

4. The device for controlling the curvature of a bonding wire according to claim 3, characterized in that: The movable rod (11) and the height adjustment structure housing (9), the movable rod (11) and the connecting rod (5), and the fixed rod (10) and the limiting strip (6) are all fixed by bolts, which facilitates installation and disassembly.

5. The device for controlling the curvature of a bonding wire according to claim 4, characterized in that: The limiting strip (6) is made of plastic or rubber.

6. The device for controlling the curvature of a bonding wire according to claim 1, characterized in that: The bonding wire (7) is aluminum wire bonding or copper wire bonding.

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