Cover opening tool for power module

Abstract

The utility model discloses a cover opening tool for a power module, and relates to the technical field of semiconductor manufacturing tools. The uncovering tool for the power module comprises an operating handle and an uncovering head, the uncovering head is detachably connected to the first end of the operating handle, the uncovering head is of a crotch-shaped structure, a working tip of the uncovering head is used for stretching into the position between a shell and an upper cover of the power module, and the operating handle is driven to drive the uncovering head to move so that the shell can be separated from the upper cover. The uncovering tool used for the power module can carry out lossless uncovering operation on the power module, plastic packaging of the power module and packaging gel in the module cannot be damaged, and therefore the influence on the production and manufacturing process and invalid analysis results of the power module is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor manufacturing tools, in particular to a cover opening tool for a power module. Background Art

[0002] As a power semiconductor device, the IGBT (Insulated Bipolar Transistor) boasts energy-saving features, easy installation and maintenance, and stable heat dissipation. It is widely used in rail transit, smart grids, industrial energy conservation, electric vehicles, and new energy equipment. The IGBT is a core device for energy conversion and transmission. Simply put, it is a combination of the MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) and the BJT (Bipolar Junction Transistor). It combines the gate-voltage-controlled transistor (high input impedance) of the MOSFET with the dual-carrier charge transfer of the BJT (voltage-controlled bipolar device) to achieve high current. Therefore, IGBT modules typically integrate multiple chips. To ensure stable operation of these chips, an external packaging structure is placed around the IGBT chip. However, during the actual IGBT module production process, failures such as poor bonding and overvoltage and overcurrent can occur. To more directly observe these phenomena and facilitate further failure analysis, the IGBT module must be non-destructively removed from the packaging.

[0003] To non-destructively open the module, the plastic housing of the encapsulated module must first be removed. In currently used IGBT modules, the plastic housing consists of a plastic housing and a plastic cover. Because the housing has a row of pins, the plastic cover slides into the pins on the housing, making it difficult to open directly by hand. Furthermore, the bottom of the plastic cover is equipped with a hook structure. When the plastic cover is pressed against the plastic housing, the hooks at both ends engage the housing, securing it to the housing without the need for additional mechanical structures. However, when opening the IGBT module to inspect the internal bond wires, the hook structure connects the plastic cover to the housing, making it impossible to open the cover directly by hand. Therefore, other tools are required. For convenience, a flat-blade screwdriver is often used to insert the flat head of the screw into the gap between the plastic cover and the housing. Leverage is then used to forcibly lift the cover, thereby opening it. However, this method of opening the cover has many disadvantages. Since the blades of general screwdrivers are relatively thick, they cannot smoothly fit into the gap between the plastic upper cover and the plastic shell, which can easily damage the IGBT module and cause the IGBT plastic shell to crack. Common tools can easily poke into the packaging gel inside the IGBT power module when opening the cover, destroying the failure phenomenon and affecting the failure analysis results. Utility Model Content

[0004] The purpose of the utility model is to provide a cover opening tool for a power module, which can perform a non-destructive cover opening operation on the power module without damaging the plastic packaging of the power module and the packaging gel inside the module, thereby avoiding affecting the production process of the power module and invalidating the analysis results.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] The present invention provides a power module cover removal tool comprising an operating handle and a cover removal head. The cover removal head is detachably connected to the first end of the operating handle and has a branch-like structure. The tip of the cover removal head is configured to extend between the outer shell and the upper cover of the power module. The operating handle is driven to move the cover removal head to separate the outer shell and the upper cover. This power module cover removal tool allows for non-destructive cover removal of the power module without damaging the plastic package of the power module or the encapsulating gel inside the module, thereby preventing any impact on the power module's manufacturing process and invalidating analytical results.

[0007] As an implementation method, the connecting end of the opener head is provided with a first thread, and the first end of the operating handle is provided with a second thread, and the first thread and the second thread cooperate with each other to threadably connect the opener head to the operating handle.

[0008] As an implementation method, the connecting end of the opener is provided with a protrusion, the first thread is arranged along the outer peripheral wall of the protrusion, the first end of the operating handle is provided with a groove, and the second thread is arranged along the inner peripheral wall of the groove.

[0009] As an implementable embodiment, the thickness of the working tip of the decapping head gradually increases along the direction of the line connecting the working tip of the decapping head to the first end of the operating handle.

[0010] As an implementable embodiment, a protective cover is further provided on the side of the operating handle close to the opening head.

[0011] As an implementable embodiment, the protective cover is a disc-shaped structure or an umbrella-shaped structure.

[0012] As an embodiment, it further includes a prying head, which is fixedly connected to the second end of the operating handle and is arranged opposite to the first end. The thickness of the working tip of the prying head is less than the thickness of the working tip of the opening head. The working tip of the prying head is used to extend between the outer shell and the upper cover. The operating handle is driven to drive the prying head to move to separate the outer shell and the upper cover.

[0013] As an implementable embodiment, the pry cover head has a tree branch-like structure.

[0014] As an implementable embodiment, the thickness of the working tip of the prying head gradually increases along the direction of the line connecting the working tip of the prying head to the second end of the operating handle.

[0015] As an implementable embodiment, the extending direction of the pry cover head and the extending direction of the operating handle are perpendicular or approximately perpendicular to each other.

[0016] The beneficial effects of the embodiments of the present utility model include:

[0017] The cover-opening tool for a power module comprises an operating handle and a cover-opening head. The cover-opening head is detachably connected to the first end of the operating handle. The cover-opening head has a branch-like structure. The working tip of the cover-opening head is used to extend between the outer shell and the upper cover of the power module. The operating handle is driven to drive the cover-opening head to move so as to separate the outer shell and the upper cover. Compared with the ordinary flat-blade screwdriver used in the prior art, the present application provides a cover-opening tool specifically for power modules, including an operating handle and a cover-opening head, which is detachably connected to the first end of the operating handle. During actual use, the operator only needs to insert the working tip of the cover-opening head between the outer shell and the upper cover of the power module, and then drive the operating handle to drive the cover-opening head to move relative to the power module (for example, lift it up or press it down, using the lever principle), so that the outer shell and the upper cover can be successfully separated, thereby realizing a non-destructive cover-opening operation on the power module; not only that, the cover-opening head provided in the present application adopts a special design of a tree-branch structure, which can increase the force area of ​​the cover-opening head, thereby avoiding damage to the plastic shell and plastic upper cover of the power module and the packaging gel inside the module, thereby avoiding affecting the production process of the power module and invalid analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a cover opening tool for a power module provided in an embodiment of the present utility model;

[0020] Figure 2 A schematic structural diagram of a cover opening head of a cover opening tool for a power module provided in an embodiment of the present utility model;

[0021] Figure 3 A schematic structural diagram of a cover opening head of a cover opening tool for a power module provided by an embodiment of the present utility model in a working state;

[0022] Figure 4 A schematic structural diagram of a cover-opening tool for a power module provided by an embodiment of the present invention, wherein the cover-opening head is in a working state;

[0023] Figure 5 This is a schematic diagram of the assembly of the housing and upper cover of the power module provided in an embodiment of the present utility model.

[0024] Icons: 101-upper cover; 102-housing; 201-opening head; 202-protective cover; 203-operating handle; 204-prying head. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0030] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections, indirect connections through an intermediate medium, or connections within two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Please refer to Figures 1 to 5 The present invention provides a power module decapping tool comprising an operating handle 203 and a decapping head 201. The decapping head 201 is detachably connected to the first end of the operating handle 203 and has a branch-like structure. The working tip of the decapping head 201 is configured to extend between the housing 102 and the upper cover 101 of the power module. The operating handle 203 is driven to move the decapping head 201 to separate the housing 102 and the upper cover 101. This power module decapping tool allows for non-destructive decapping of power modules without damaging the plastic packaging of the power module or the encapsulating gel inside the module, thereby preventing any impact on the power module's manufacturing process and invalidating analytical results.

[0032] It should be noted that if Figure 1 and Figure 2 As shown, the opening tool includes an operating handle 203 and an opening head 201, wherein the opening head 201 is detachably connected to the first end of the operating handle 203. In this way, during the production, packaging and transportation stage, the opening head 201 and the operating handle 203 can be manufactured separately, the production process is simpler, and the packaging and transportation product is smaller. During actual use, it is only necessary to connect the opening head 201 and the operating handle 203. The operator can operate the opening head 201 by holding the operating handle 203 to perform non-destructive opening of the power module through the opening head 201. In addition, the operator can also replace opening heads 201 of different sizes to adapt to power modules of different sizes and models, thereby improving the adaptability of the opening tool.

[0033] Specifically, if Figure 3As shown, in actual use, it is only necessary to extend the working tip of the decapping head 201 between the housing 102 and the upper cover 101 of the power module, and then drive the operating handle 203 to drive the decapping head 201 to move relative to the power module (for example, lift it up or press it down, using the lever principle), so that the housing 102 and the upper cover 101 can be successfully separated. On this basis, as shown in FIG. Figure 1 and Figure 2 As shown, the opening head 201 is in a tree-branch structure to increase the force-bearing area of ​​the opening head 201 , thereby avoiding damage to the plastic housing 102 and the plastic upper cover 101 of the power module.

[0034] To sum up, compared with the ordinary flat-blade screwdriver used in the prior art, the present application provides a cover-opening tool specifically for power modules, including an operating handle 203 and a cover-opening head 201. The cover-opening head 201 is detachably connected to the first end of the operating handle 203. During actual use, the operator only needs to insert the working tip of the cover-opening head 201 between the outer shell 102 and the upper cover 101 of the power module, and then drive the operating handle 203 to drive the cover-opening head 201 to move relative to the power module (for example, lift it up or press it down, based on the lever principle), so that the outer shell 102 and the upper cover 101 can be successfully separated, thereby realizing a non-destructive cover-opening operation on the power module; not only that, the cover-opening head 201 provided in the present application adopts a special design of a tree-branch structure, which can increase the force area of ​​the cover-opening head 201, thereby avoiding damage to the plastic shell 102 and the plastic upper cover 101 of the power module and the packaging gel inside the module, thereby avoiding affecting the production process of the power module and invalid analysis results.

[0035] As an implementable method, Figure 2 As shown, the connecting end of the opening head 201 is provided with a first thread, and the first end of the operating handle 203 is provided with a second thread. The first thread and the second thread cooperate with each other to threadably connect the opening head 201 to the operating handle 203. The threaded connection method is used to achieve a detachable connection between the opening head 201 and the operating handle 203, which has the advantages of easy installation and disassembly and a stable and reliable connection.

[0036] As an implementable method, Figure 2 As shown, the connecting end of the decapping head 201 is provided with a protrusion, and the first thread is arranged along the outer peripheral wall of the protrusion. In this case, the first thread is an external thread. The first end of the operating handle 203 is provided with a groove, and the second thread is arranged along the inner peripheral wall of the groove. In this case, the second thread is an internal thread. Of course, in other embodiments, the connecting end of the decapping head 201 can also be provided with a groove, and the first thread is arranged along the inner peripheral wall of the groove. In this case, the first thread is an internal thread. The first end of the operating handle 203 is provided with a protrusion, and the second thread is arranged along the outer peripheral wall of the protrusion. In this case, the second thread is an external thread.

[0037] Regardless of which structural design is adopted, the first thread and the second thread can cooperate with each other, and the cover opening head 201 is threadedly connected to the operating handle 203. Those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here.

[0038] As an implementable method, Figure 1 and Figure 2 As shown, along the line from the working tip of the decapping head 201 to the first end of the operating handle 203 , the thickness of the working tip of the decapping head 201 gradually increases, so that the working tip of the decapping head 201 can be easily inserted into the gap between the shell 102 and the upper cover 101 .

[0039] Since a PIN pin is provided at the junction of the housing 102 and the upper cover 101, there is a certain clamping force that blocks the cover opening operation. Therefore, the operator needs to exert a certain amount of force on the operating handle 203 to use the cover opening head 201 to open the cover. In order to prevent the operator from slipping and hitting the PIN pin and getting injured, as an implementation method, Figure 1 and Figure 3 As shown, a protective cover 202 is further provided on one side of the operating handle 203 close to the decapping head 201 , so as to block and protect the operator's hands through the protective cover 202 .

[0040] As an implementation method, the protective cover 202 is a disc-shaped structure or an umbrella-shaped structure. Those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific limitations are given here.

[0041] As an implementable method, Figure 1 and Figure 4 As shown, the cover opening tool also includes a prying head 204, which is fixedly connected to the second end of the operating handle 203 and is arranged opposite to the first end. The thickness of the working tip of the prying head 204 is less than the thickness of the working tip of the cover opening head 201. The working tip of the prying head 204 is used to extend between the shell 102 and the upper cover 101. The operating handle 203 is driven to drive the prying head 204 to move to separate the shell 102 and the upper cover 101.

[0042] It should be noted that, considering that the gap between the housing 102 and the upper cover 101 of some power modules is small, the working tip of the decapping head 201 may be difficult to extend between the housing 102 and the upper cover 101. Figure 1 and Figure 4The cover opening tool 201 is inserted into the gap between the housing 102 and the upper cover 101, and the cover opening tool 201 is moved relative to the power module 201 to separate the housing 102 and the upper cover 101 to a certain extent.

[0043] Similar to the structural design of the opening head 201, as an implementable embodiment, the prying head 204 has a tree-branch structure to increase the force-bearing area of ​​the prying head 204, thereby avoiding damage to the plastic shell 102 and the plastic upper cover 101 of the power module and the packaging gel inside the module, thereby avoiding affecting the production process of the power module and invalid analysis results.

[0044] Similar to the design of the working tip of the opening head 201, as an implementable embodiment, the thickness of the working tip of the prying head 204 gradually increases along the line connecting the working tip of the prying head 204 to the second end of the operating handle 203, so that the working tip of the prying head 204 can be easily inserted into the gap between the shell 102 and the upper cover 101.

[0045] As an implementable method, Figure 1 and Figure 4 As shown, the extending direction of the prying cover head 204 and the extending direction of the operating handle 203 are perpendicular or approximately perpendicular to each other, so that the cover opening operation is more labor-saving.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A cover opening tool for a power module, characterized in that: It includes an operating handle and an opening head, the opening head is detachably connected to the first end of the operating handle, the opening head has a tree-branch structure, the working tip of the opening head is used to extend between the outer shell and the upper cover of the power module, and the operating handle is driven to drive the opening head to move to separate the outer shell and the upper cover.

2. The cover opening tool for a power module according to claim 1, characterized in that: The connecting end of the opener head is provided with a first thread, and the first end of the operating handle is provided with a second thread. The first thread and the second thread cooperate with each other to threadably connect the opener head to the operating handle.

3. The cover opening tool for power module according to claim 2, characterized in that: The connecting end of the opener is provided with a protrusion, the first thread is arranged along the outer peripheral wall of the protrusion, the first end of the operating handle is provided with a groove, and the second thread is arranged along the inner peripheral wall of the groove.

4. The cover opening tool for a power module according to claim 1, characterized in that: Along the direction of a line from the working tip of the decapping head to the first end of the operating handle, the thickness of the working tip of the decapping head gradually increases.

5. The cover opening tool for a power module according to claim 1, characterized in that: A protective cover is also provided on one side of the operating handle close to the cover opening head.

6. The cover opening tool for a power module according to claim 5, characterized in that: The protective cover is in a disc-shaped structure or an umbrella-shaped structure.

7. The cover opening tool for a power module according to claim 1, characterized in that: The cover-lifting device further comprises a prying head, which is fixedly connected to the second end of the operating handle and is arranged opposite to the first end. The thickness of the working tip of the prying head is less than the thickness of the working tip of the opening head. The working tip of the prying head is used to extend between the outer shell and the upper cover. The operating handle is driven to drive the prying head to move so as to separate the outer shell and the upper cover.

8. The cover opening tool for a power module according to claim 7, characterized in that: The pry cover head is in a tree branch type structure.

9. The cover opening tool for a power module according to claim 7, characterized in that: Along the direction of the line from the working tip of the prying head to the second end of the operating handle, the thickness of the working tip of the prying head gradually increases.

10. The cover opening tool for a power module according to claim 7, characterized in that: The extending direction of the pry cover head and the extending direction of the operating handle are perpendicular or approximately perpendicular to each other.

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