Push-pull force equipment

Abstract

The utility model discloses push-pull force equipment which comprises a base, a carrier plate, a carrier and a pressing plate, the carrier plate is arranged on one side of the base in the thickness direction, a groove is formed in the carrier plate, and the groove is suitable for placing a frame and a substrate of a power chip; the carrier is connected with the base, the carrier is located on the side, away from the base, of the carrier plate, and the carrier can be switched between an ascending position and a descending position relative to the carrier plate; the pressing plate is connected with the carrier, the pressing plate is located between the carrier and the carrier plate, the pressing plate comprises a body and at least one extending part which are connected with each other, and the extending part extends in the direction towards the carrier; when the carrier is located at the rising position, the pressing plate is suitable for being separated from the frame and the substrate; when the carrier is located at the descending position, the body is suitable for abutting against the frame, and the extending part is suitable for abutting against the substrate. According to the push-pull force equipment provided by the utility model, the risk of warping of the frame and the substrate can be reduced, so that the tensile strength of the aluminum wire can be accurately detected, and the measurement precision can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of push-pull force equipment, in particular to a push-pull force equipment. Background Art

[0002] In the related art, the frame of the power chip is bonded to the power chip by using aluminum wire to achieve electrical interconnection between the power chip and the frame. However, after the aluminum wire is bonded, a push-pull force meter is required to test the bonding strength of the aluminum wire. Due to the high structural strength of the aluminum wire, the frame will be severely warped under the tensile force during the break test, which will affect the measurement accuracy. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a push-pull force device that can reduce the risk of warping of the frame and the substrate, so as to accurately detect the tensile strength of the aluminum wire and thus improve the measurement accuracy.

[0004] According to the push-pull force device of the embodiment of the utility model, it includes: a base and a carrier plate, the carrier plate is arranged on one side of the base in the thickness direction, a groove is formed on the carrier plate, and the groove is suitable for placing the frame and substrate of the power chip; a carrier, the carrier is connected to the base, and the carrier is located on the side of the carrier plate away from the base, and the carrier can be switched between an ascending position and a descending position relative to the carrier plate; a pressure plate, the pressure plate is connected to the carrier, the pressure plate is located between the carrier and the carrier, the pressure plate includes a main body connected to each other and at least one extension part, and the extension part extends in a direction toward the carrier; wherein, when the carrier is in the ascending position, the pressure plate is suitable for separating from the frame and the substrate; when the carrier is in the descending position, the main body is suitable for abutting against the frame, and the extension part is suitable for abutting against the substrate.

[0005] According to the push-pull force device of the embodiment of the utility model, the pressing plate includes a main body and at least one extension part connected to each other, and in the tensile test of the aluminum wire, the main body abuts against the frame, and the extension abuts against the substrate. Thus, compared with the traditional push-pull force meter, the risk of warping of the frame and the substrate can be reduced, so that the tensile strength of the aluminum wire can be accurately detected, and the measurement accuracy can be improved.

[0006] According to some embodiments of the present invention, the cross-sectional area of ​​the extension portion gradually decreases along a direction toward the carrier plate.

[0007] According to some embodiments of the utility model, the extension portion includes: a first extension section, the first extension section is connected to the main body, and the first extension section extends toward the center of the main body in the length direction of the base; and a second extension section, the second extension section is connected to the first extension section, and the second extension section extends along the thickness direction of the base.

[0008] According to some embodiments of the present invention, an end surface of the second extension segment at an end away from the first extension segment is a plane.

[0009] According to some embodiments of the present invention, the first extension section includes a first sub-segment and a second sub-segment connected to each other, the first sub-segment is located above the main body and connected to the main body in the thickness direction of the base, and the side surface of the second sub-segment away from the carrier plate is flush with the side surface of the main body away from the carrier plate in the thickness direction of the base.

[0010] According to some embodiments of the present invention, the second extension segment is an arc segment.

[0011] According to some embodiments of the utility model, the main body includes: two first connecting sections, the two first connecting sections are spaced apart along the width direction of the base and connected to the carrier, and when the carrier is in the lowered position, the two first connecting sections are suitable for stopping with the frame; two second connecting sections, each of the two ends of the second connecting sections is respectively connected to the two first connecting sections, and the extension portion is connected to the second connecting sections.

[0012] According to some embodiments of the present invention, each of the first connecting segments includes a first sub-connecting segment and a second sub-connecting segment connected to each other, the first sub-connecting segment extends along the length direction of the base, the second sub-connecting segment extends along the thickness direction of the base, and the second sub-connecting segment is located on a side of the first sub-connecting segment adjacent to the second connecting segment.

[0013] According to some embodiments of the present invention, there are multiple extension parts, and the multiple extension parts are respectively arranged on both sides of the main body in the length direction of the base.

[0014] According to some embodiments of the present invention, the carrier is formed with an opening, and the opening is opposite to the pressing plate in the thickness direction of the base.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a cross-sectional view of a push-pull force device according to an embodiment of the utility model;

[0018] Figure 2 is a top view of a push-pull force device according to an embodiment of the utility model;

[0019] Figure 3 is a schematic diagram of a pressure plate and a carrier of a push-pull force device according to an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of a pressure plate of a push-pull force device according to an embodiment of the utility model.

[0021] Reference numerals:

[0022] 100: Push and pull equipment;

[0023] 1: base; 2: carrier plate; 3: carrier; 31: opening; 4: pressure plate; 41: body; 411: first connecting section; 412: first sub-connecting section; 413: second sub-connecting section; 414: second connecting section; 42: extension; 421: first extending section; 422: first sub-section; 423: second sub-section; 424: second extending section; 5: hook knife; 6: adjustment knob;

[0024] 200: frame; 300: substrate; 400: power chip; 500: aluminum wire;. DETAILED DESCRIPTION

[0025] Reference below Figure 1-Figure 4 The push-pull force device 100 according to an embodiment of the present invention is described, wherein the push-pull force device 100 is used to measure the bonding strength of the aluminum wire 500 between the power chip 400 and the frame 200 of the power module as an example for description, but the invention is not limited thereto.

[0026] The power module includes a frame 200, a substrate 300, a power chip 400 and a driving chip. The frame 200 is located on one side of the substrate 300 in the thickness direction. The power chip 400 is arranged on the substrate 300. The frame 200 includes a control pin, a base island and a power pin. The driving chip is arranged on the base island. The driving chip is electrically connected to the control pin. The power chip 400 is electrically connected to the power pin through a thick aluminum wire 500. The power chip 400 is electrically connected to the control pin through a thin aluminum wire 500.

[0027] like Figure 1-Figure 4 As shown, the push-pull force device 100 according to the embodiment of the utility model includes: a base 1, a carrier plate 2, a carrier 3 and a pressure plate 4.

[0028] Specifically, the carrier plate 2 is disposed in the thickness direction of the base 1 (for example, Figure 2 A groove is formed on the carrier 2 on one side (in the up and down direction), and the groove is suitable for placing the frame 200 and the substrate 300 of the power chip 400. The carrier 3 is connected to the base 1, and the carrier 3 is located on the side of the carrier 2 away from the base 1, and the carrier 3 can be switched between the ascending position and the descending position relative to the carrier 2. The pressing plate 4 is connected to the carrier 3, and the pressing plate 4 is located between the carrier 3 and the carrier 2. The pressing plate 4 includes a main body 41 and at least one extension 42 connected to each other, and the extension 42 extends in the direction toward the carrier 3. Among them, when the carrier 3 is in the ascending position, the pressing plate 4 is suitable for separating from the frame 200 and the substrate 300; when the carrier 3 is in the descending position, the main body 41 is suitable for abutting against the frame 200, and the extension 42 is suitable for abutting against the substrate 300.

[0029] For example, in Figure 1 and Figure 2 In the example, part of the carrier plate 2 is recessed toward the base 1 to form a groove, and the shape of the groove is adapted to the shape of the frame 200 and the substrate 300. Both ends of the carrier 3 in the length direction are respectively connected to the base 1 to connect the carrier 3 to the base 1. An adjustment knob 6 can be installed on the base 1, and the carrier 3 is moved along the thickness direction of the base 1 by turning the adjustment knob 6. The pressing plate 4 is located below the carrier 3, and the body 41 of the pressing plate 4 is connected to the carrier 3 to fix the pressing plate 4 on the carrier 3, so that when the carrier 3 moves along the thickness direction of the base 1, the pressing plate 4 can also move along the thickness direction of the base 1.

[0030] The process of the push-pull force device 100 measuring the bonding strength of the aluminum wire 500 between the power chip 400 and the frame 200 is as follows: first, rotate the adjustment knob 6 to switch the carrier 3 to the rising position, at which time the carrier 3 is separated from the carrier 2; then place the frame 200 and the substrate 300 in the groove of the carrier 2, and then push the carrier 2 to move the carrier 2 to the bottom of the pressure plate 4; then rotate the adjustment knob 6 to switch the carrier 3 to the lowering position, at which time the body 41 stops against the frame 200, and the extension part 42 stops against the substrate 300; finally, operate the hook knife 5 of the push-pull force device 100 to hook the aluminum wire 500, and stretch the aluminum wire 500 to measure the tensile strength of the aluminum wire 500.

[0031] Among them, in the tensile test of the aluminum wire 500, the frame 200 and the substrate 300 can be stopped on the carrier 2 by the pressure plate 4, so that the frame 200 and the substrate 300 can be evenly stressed during the stretching process of the aluminum wire 500, thereby reducing the risk of warping of the frame 200 and the substrate 300, and then the tensile strength of the aluminum wire 500 can be accurately detected.

[0032] According to the push-pull force device 100 of the embodiment of the utility model, the pressing plate 4 includes a main body 41 and at least one extension 42 connected to each other, and in the tensile test of the aluminum wire 500, the main body 41 abuts against the frame 200, and the extension 42 abuts against the substrate 300. Therefore, compared with the traditional push-pull force meter, the risk of warping of the frame 200 and the substrate 300 can be reduced, so that the tensile strength of the aluminum wire 500 can be accurately detected, and the measurement accuracy can be improved.

[0033] According to some embodiments of the present invention, the cross-sectional area of ​​the extension portion 42 gradually decreases along the direction toward the carrier plate 2. Figure 1 and Figure 4 As shown, the cross-section of the extension 42 is roughly triangular, and the cross-sectional area of ​​one end of the extension 42 adjacent to the body 41 is larger, which increases the contact area between the extension 42 and the body 41, and can improve the connection reliability between the extension 42 and the body 41. The cross-sectional area of ​​one end of the extension 42 adjacent to the carrier 3 (i.e., the end of the extension 42 suitable for abutting against the substrate 300) is smaller, which can reduce the material usage of the pressing plate 4 while ensuring that the substrate 300 can be abutted against the carrier 3 during the tensile test of the aluminum wire 500, which is conducive to the lightweight design of the pressing plate 4 and reduces the cost of the push-pull force device 100.

[0034] Further, refer to Figure 3 and Figure 4 The extension portion 42 includes a first extension section 421 and a second extension section 424. The first extension section 421 is connected to the body 41. For example, the first extension section 421 can be connected to the body 41 by a fastener such as a screw to securely fix the extension portion 42 to the body 41. The first extension section 421 is disposed in the length direction of the base 1 (for example, Figure 2 The second extension section 424 is connected to the first extension section 421, and the second extension section 424 extends along the thickness direction of the base 1. At this time, the shape of the extension section 42 is roughly L-shaped. In this way, while ensuring the structural strength of the extension section 42, the structure of the pressing plate 4 is simpler, which is easy to process.

[0035] Furthermore, if Figure 4 As shown, the end surface of the second extension section 424 away from the first extension section 421 is a plane. In other words, the second extension section 424 is in surface contact with the substrate 300. Thus, the contact area between the extension portion 42 and the substrate 300 can be increased, thereby increasing the force-bearing area of ​​the substrate 300, and avoiding stress concentration on the substrate 300 and damaging the substrate 300.

[0036] According to some specific embodiments of the present invention, the first extension section 421 includes a first subsection 422 and a second subsection 423 connected to each other. In the thickness direction of the base 1, the first subsection 422 is located above the body 41 and connected to the body 41. Figure 3 and Figure 4 In the example, the first subsection 422 is rectangular in shape, is disposed on one side of the thickness direction of the body 41, and is connected to the body 41 by a fastener such as a bolt. The second subsection 423 is disposed on one side of the first subsection 422 adjacent to the center of the body 41 and extends along the length direction of the base 1.

[0037] Among them, in the thickness direction of the base 1, the surface of the second sub-segment 423 on one side away from the carrier plate 2 is flush with the surface of the body 41 on one side away from the carrier plate 2. Such an arrangement ensures the connection reliability between the extension portion 42 and the body 41, makes the surface of the push-pull force device 100 smoother, and can reduce the thickness of the second sub-segment 423 and the weight of the pressing plate 4.

[0038] In some optional embodiments, such as Figure 4 As shown, the second extension section 424 is an arc section. With such a configuration, the length of the extension portion 42 can be increased within a limited space, thereby enhancing the structural strength of the extension portion 42 and preventing the extension portion 42 from deforming.

[0039] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the body 41 includes two first connecting segments 411 and two second connecting segments 414. The two first connecting segments 411 extend along the width direction of the base 1 (for example, Figure 1 The two first connecting sections 411 are spaced apart in the middle and upper directions and connected to the carrier 3. When the carrier 3 is in the lowered position, the two first connecting sections 411 are suitable for abutting against the frame 200. Both ends of each second connecting section 414 are respectively connected to the two first connecting sections 411, and the extension portion 42 is connected to the second connecting section 414.

[0040] Reference Figure 3 and Figure 4 The first connecting section 411 extends along the length direction of the base 1, the second connecting section 414 extends along the width direction of the base 1, and the two second connecting sections 414 are spaced apart along the length direction of the first connecting section 411. One end of the extension portion 42 is connected to the middle of the first connecting section 411, so that the center of the pressing plate 4 coincides with the center of gravity, avoiding the pressing plate 4 from tilting during the tensile test, thereby further preventing the frame 200 and the base plate 300 from warping.

[0041] Further, each first connection segment 411 includes a first sub-connection segment 412 and a second sub-connection segment 413 connected to each other, the first sub-connection segment 412 extends along the length direction of the base 1, the second sub-connection segment 413 extends along the thickness direction of the base 1, and the second sub-connection segment 413 is located on a side of the first sub-connection segment 412 adjacent to the second connection segment 414. In other words, the shape of the first connection segment 411 is L-shaped. During the tensile test, the second sub-connection segment 413 abuts against the frame 200, while ensuring the structural strength of the body 41, the contact area between the second sub-connection segment 413 and the frame 200 is increased, so that the frame 200 can be more stably abutted on the carrier 2, avoiding the frame 200 from warping during the tensile test.

[0042] According to some embodiments of the present invention, there are multiple extension parts 42, and the multiple extension parts 42 are respectively arranged on both sides of the body 41 in the length direction of the base 1. In the description of the present invention, the meaning of "multiple" is two or more. Figure 1-Figure 4 As shown, there are two extension parts 42, which are respectively located on both sides of the width direction of the body 41, that is, the two extension parts 42 are respectively connected to the two second connecting sections 414. Therefore, during the tensile test, the surface of the substrate 300 is stopped against the two extension parts 42 on both sides of the length direction of the base 1, so that the substrate 300 is stopped on the carrier 2 more stably, avoiding the substrate 300 from warping, and ensuring the measurement accuracy.

[0043] Figure 1 Two extensions 42 are shown for illustrative purposes, but after reading the technical solution of the present application, an ordinary technician can obviously understand that the solution can be applied to a technical solution with three or more extensions 42, which also falls within the protection scope of the present utility model.

[0044] According to some embodiments of the present invention, Figure 3 and Figure 4 As shown, the carrier 3 is formed with an opening 31, for example, the shape of the opening 31 can be rectangular, and the opening 31 is opposite to the pressing plate 4 in the thickness direction of the base 1. In this way, during the tensile test, the operator can directly observe the stop condition of the pressing plate 4, the frame 200 and the base plate 300 through the opening 31, and at the same time, the weight of the carrier 3 can be reduced, which is conducive to the lightweight design of the push-pull force device 100.

[0045] Other structures and operations of the push-pull force device 100 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, 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 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 this application can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A push-pull force device, characterized in that: include: A base and a carrier, wherein the carrier is arranged on one side of the base in the thickness direction, and a groove is formed on the carrier, wherein the groove is suitable for placing a frame and a substrate of a power chip; A carrier, the carrier is connected to the base and is located on a side of the carrier plate away from the base, and the carrier is switchable between a raised position and a lowered position relative to the carrier plate; A pressing plate, the pressing plate is connected to the carrier, the pressing plate is located between the carrier and the carrier, the pressing plate comprises a main body and at least one extension portion connected to each other, the extension portion extends in a direction toward the carrier; Wherein, when the carrier is located at the raised position, the pressing plate is adapted to be separated from the frame and the substrate; When the carrier is located at the descending position, the main body is suitable for abutting against the frame, and the extending portion is suitable for abutting against the substrate.

2. The push-pull force device according to claim 1, characterized in that: The cross-sectional area of ​​the extension portion gradually decreases along a direction toward the carrier plate.

3. The push-pull force device according to claim 2, characterized in that: The extension portion comprises: A first extension section, the first extension section is connected to the body, and the first extension section extends toward the center of the body in the length direction of the base; A second extension section, wherein the second extension section is connected to the first extension section, and the second extension section extends along a thickness direction of the base.

4. The push-pull force device according to claim 3, characterized in that: An end surface of the second extending section away from the first extending section is a plane.

5. The push-pull force device according to claim 4, characterized in that: The first extension section includes a first sub-section and a second sub-section connected to each other, the first sub-section is located above the main body and connected to the main body in the thickness direction of the base, and the side surface of the second sub-section away from the carrier is flush with the side surface of the main body away from the carrier in the thickness direction of the base.

6. The push-pull force device according to claim 3, characterized in that: The second extension section is an arc-shaped section.

7. The push-pull force device according to any one of claims 1 to 6, characterized in that: The body comprises: Two first connecting sections, the two first connecting sections are spaced apart along the width direction of the base and connected to the carrier, and when the carrier is in the descending position, the two first connecting sections are suitable for abutting against the frame; Two second connecting sections, two ends of each of the second connecting sections are respectively connected to the two first connecting sections, and the extending portion is connected to the second connecting section.

8. The push-pull force device according to claim 7, characterized in that: Each of the first connecting segments includes a first sub-connecting segment and a second sub-connecting segment connected to each other, the first sub-connecting segment extends along the length direction of the base, the second sub-connecting segment extends along the thickness direction of the base, and the second sub-connecting segment is located on a side of the first sub-connecting segment adjacent to the second connecting segment.

9. The push-pull force device according to claim 1, characterized in that: There are a plurality of extension parts, and the plurality of extension parts are respectively arranged on both sides of the main body in the length direction of the base.

10. The push-pull force device according to claim 1, characterized in that: The carrier is formed with an opening, and the opening is opposite to the pressing plate in the thickness direction of the base.

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