Welding tool applied to insulating substrate of power device module

Abstract

The utility model discloses a welding tool applied to an insulating substrate of a power device module. The welding tool comprises a heat conducting plate; the bottom plate is arranged on the heat conducting plate, the bottom plate is suitable for placing a plurality of module insulating substrates, and the plurality of module insulating substrates are placed on the bottom plate at equal intervals; and the limiting mechanism is arranged on the bottom plate and sleeves the edges of the plurality of module insulating substrates so as to be suitable for separating the plurality of module insulating substrates, so that the plurality of module insulating substrates are not easy to deviate.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tools, in particular to a welding tool applied to an insulating substrate of a power device module. Background Art

[0002] The welding of semiconductor power device modules is mainly divided into welding between chip and module insulating substrate, welding between module insulating substrate and base plate, and welding between terminal and module insulating substrate. The welding quality between module insulating substrate and metal base plate has a great influence on product performance.

[0003] In the traditional module insulation substrate and the metal base plate, ink is printed on the base plate welding surface for solder mask. Due to the large size error of the ink printing, the solder mask effect is poor, and the module insulation substrate and the metal base plate are prone to offset. At present, the commonly used materials for the module metal base plate are aluminum silicon carbide and copper. The curvature of the copper base plate is much larger than that of the aluminum silicon carbide. During the welding process of the module insulation substrate and the metal base plate, the copper base plate deforms greatly, and the module insulation substrate will shrink toward the center of the metal base plate. Therefore, when multiple insulation substrates are welded at the same time, the insulation substrates at the edges will shrink inward and clamp the welding tooling. When the welding is completed, removing the fixture will cause the ceramic edge of the module insulation substrate to collapse, resulting in a decrease in the insulation performance of the product. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a welding tool for an insulating substrate of a power device module, comprising:

[0005] Heat conducting plate;

[0006] A bottom plate, the bottom plate is arranged on the heat conducting plate, the bottom plate is suitable for placing a plurality of module insulating substrates, and the plurality of module insulating substrates are placed on the bottom plate at equal intervals;

[0007] The limiting mechanism is arranged on the bottom plate to separate the plurality of module insulating substrates and is sleeved on the edges of the plurality of module insulating substrates to prevent the plurality of module insulating substrates from being easily displaced.

[0008] Preferably, two first copper pillars are provided on one end of the heat conducting plate, and the two first copper pillars are arranged at intervals.

[0009] Preferably, two second copper pillars are provided on the other end of the heat conducting plate, and the two second copper pillars are arranged at intervals and opposite to the two first copper pillars.

[0010] Preferably, two first positioning holes are provided at intervals at one end of the bottom plate, and the first positioning holes are provided through the bottom plate in the thickness direction and are plugged and matched with the first copper pillars.

[0011] Preferably, two second positioning holes are provided at intervals on the other end of the bottom plate. The second positioning holes are provided through the bottom plate in the thickness direction and are arranged opposite to the first positioning holes and are plug-fitted with the second copper pillars.

[0012] Preferably, the limiting mechanism comprises:

[0013] A first limiting plate, wherein the first limiting plate is arranged on one end of the bottom plate;

[0014] Two third positioning holes, which are spaced apart at the ends of the first limiting plate and are plugged and matched with the two first copper pillars;

[0015] A plurality of first protrusions, wherein the plurality of first protrusions are respectively arranged at equal intervals on the inner side of the first limiting plate;

[0016] Two first baffles are respectively arranged on the inner sides of the first limiting plate opposite to each other.

[0017] Preferably, the limiting mechanism further includes:

[0018] a second limiting plate, which is disposed on the other end of the bottom plate and is arranged opposite to the first limiting plate;

[0019] Two fourth positioning holes, which are arranged at intervals at the ends of the second limiting plate and are plugged and matched with the two second copper pillars;

[0020] A plurality of second protrusions, wherein the plurality of second protrusions are respectively arranged at equal intervals on the inner side of the second limiting plate;

[0021] Two second baffles are respectively arranged on the inner sides of the second limiting plate opposite to each other.

[0022] Preferably, grooves are respectively provided on both sides of the heat conducting plate and the bottom plate.

[0023] The above solution of the utility model includes at least the following beneficial effects:

[0024] Before welding, multiple module insulating substrates are placed on the bottom plate at intervals, and then the limiting mechanism is sleeved on the edges of the multiple module insulating substrates, and the inner side of the limiting mechanism is abutted against the multiple module insulating substrates to separate the multiple module insulating substrates, so that the module insulating substrates at the edge of the bottom plate will not shrink, rotate or shift toward the middle during welding, thereby ensuring the insulation performance of the product after welding.

[0025] 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

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a welding tool applied to an insulating substrate of a power device module provided in an embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of a bottom plate provided in an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a limiting mechanism provided in an embodiment of the utility model.

[0030] Description of Figure Numbers:

[0031] 1. Heat conducting plate, 2. Bottom plate, 3. Limiting mechanism;

[0032] 101, a first copper pillar, 102, a second copper pillar, 103, a groove;

[0033] 201, a first positioning hole, 202, a second positioning hole;

[0034] 301, a first limiting plate, 302, a third positioning hole, 303, a first protrusion, 304, a first baffle, 305, a second limiting plate, 306, a fourth positioning hole, 307, a second protrusion, 308, a second baffle.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0037] 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", "clockwise", "counterclockwise", "axial", "circumferential", "radial" 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 referred device or element 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.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection 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 specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The welding tool applied to the insulating substrate of a power device module according to an embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0042] See also Figures 1 to 3 In this embodiment, it includes: a heat conducting plate 1; a bottom plate 2, which is arranged on the heat conducting plate 1, and is suitable for placing a plurality of module insulating substrates on the bottom plate 2, and the plurality of module insulating substrates are placed on the bottom plate 2 at equal intervals; a limiting mechanism 3, which is arranged on the bottom plate 2, and is suitable for separating the plurality of module insulating substrates so that the plurality of module insulating substrates are not easily offset; before welding, the plurality of module insulating substrates are respectively placed on the bottom plate 2 at intervals, and then the limiting mechanism 3 is sleeved on the edges of the plurality of module insulating substrates, and the inner side of the limiting mechanism 3 is against the plurality of module insulating substrates to separate the plurality of module insulating substrates, so that the module insulating substrates at the edge of the bottom plate 2 will not shrink, rotate or offset toward the middle during welding, thereby ensuring the insulation performance of the product after welding.

[0043] In this embodiment, two first copper pillars 101 are provided at one end of the heat conducting plate 1, and the two first copper pillars 101 are arranged at intervals; two second copper pillars 102 are provided at the other end of the heat conducting plate 1, and the two second copper pillars 102 are arranged at intervals and opposite to the two first copper pillars 101; the above-mentioned heat conducting plate 1 is made of graphite; the first copper pillars 101 and the second copper pillars 102 are detachably plugged into the bottom plate 2 and the limiting mechanism 3, so that the bottom plate 2 and the limiting mechanism 3 can be replaced in time when they are damaged, or the limiting mechanism 3 can be disassembled to remove the module insulating substrate.

[0044] In this embodiment, two first positioning holes 201 are provided at one end of the base plate 2, and the first positioning holes 201 are arranged to penetrate along the thickness direction of the base plate 2, and are plugged and matched with the first copper column 101; two second positioning holes 202 are provided at the other end of the base plate 2, and the second positioning holes 202 are arranged to penetrate along the thickness direction of the base plate 2, and are arranged opposite to the first positioning holes 201, and are plugged and matched with the second copper column 102; the above-mentioned base plate 2 is a metal base plate 2; the first positioning holes 201 and the second positioning holes 202 are respectively plugged and matched with the first copper column 101 and the second copper column 102, so that the base plate 2 will not be offset during welding.

[0045] In this embodiment, the limiting mechanism 3 includes: a first limiting plate 301, the first limiting plate 301 is arranged at one end of the bottom plate 2; two third positioning holes 302, the two third positioning holes 302 are arranged at intervals at the ends of the first limiting plate 301, and are plugged and matched with the two first copper pillars 101; a plurality of first protrusions 303, the plurality of first protrusions 303 are arranged at equal intervals on the inner side of the first limiting plate 301; two first baffles 304, the two first baffles 304 are respectively arranged on the inner side of the first limiting plate 301 opposite to each other; the first limiting The plate 301 is plugged into and matched with the first copper column 101 through the third positioning hole 302, so that the first limiting plate 301 will not be offset during welding, thereby ensuring that the module insulating substrate in the first limiting plate 301 will not follow the displacement of the first limiting plate 301 during welding, and a module insulating substrate can be placed in the middle of the first limiting plate 301, and the module insulating substrate in the first limiting plate 301 is abutted against multiple first protrusions 303, so that the module insulating substrate will not be displaced and deformed toward the middle position of the base plate 2.

[0046] In the present embodiment, the limiting mechanism 3 also includes: a second limiting plate 305, the second limiting plate 305 is arranged at the other end of the base plate 2 and is arranged opposite to the first limiting plate 301; two fourth positioning holes 306, the two fourth positioning holes 306 are arranged at intervals at the end of the second limiting plate 305, and are plugged and matched with the two second copper pillars 102; a plurality of second protrusions 307, the plurality of second protrusions 307 are respectively and evenly spaced on the inner side of the second limiting plate 305; two second baffles 308, the two second baffles 308 are respectively and relatively arranged on the inner side of the second limiting plate 305; the second limiting plate 305 is plugged and matched with the fourth positioning holes 306 and the second copper pillars 102, so that the second limiting plate 305 will not deviate during welding, thereby ensuring that the module insulating substrate in the first limiting plate 301 will not follow during welding. The second limit plate 305 is displaced, and a module insulating substrate can be placed in the middle of the second limit plate 305, and the module insulating substrate in the second limit plate 305 is abutted against multiple second protrusions 307, so that the module insulating substrate will not be displaced and deformed to the middle position of the base plate 2, and a module insulating substrate can be placed between the first limit block and the second limit block, and the module insulating substrate is abutted against the first protrusion 303, the second protrusion 307, the first baffle 304 and the second baffle 308. The module insulating substrate will not be deformed and positioned by the first protrusion 303, the second protrusion 307, the first baffle 304 and the second baffle 308, thereby ensuring the insulation performance of the module insulating substrate after welding; the above-mentioned first limit plate 301 and the second limit block 305 are made of titanium alloy.

[0047] In this embodiment, grooves 103 are respectively provided on both sides of the heat conducting plate 1 and the bottom plate 2. The grooves 103 on both sides can facilitate manual or external removal of the heat conducting plate 1, so that the operator or external equipment can hold the heat conducting plate 1 steadily.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A welding tool for insulating substrate of power device module, characterized in that: include: Heat conducting plate; A bottom plate, the bottom plate is arranged on the heat conducting plate, the bottom plate is suitable for placing a plurality of module insulating substrates, and the plurality of module insulating substrates are placed on the bottom plate at equal intervals; The limiting mechanism is arranged on the bottom plate and sleeved on the edges of the plurality of module insulating substrates to separate the plurality of module insulating substrates so as to prevent the plurality of module insulating substrates from shifting easily.

2. A welding tool for insulating substrate of power device module according to claim 1, characterized in that: Two first copper pillars are disposed on one end of the heat conducting plate, and the two first copper pillars are spaced apart.

3. A welding tool for insulating substrate of power device module according to claim 2, characterized in that: Two second copper pillars are disposed on the other end of the heat conducting plate. The two second copper pillars are disposed at intervals and are disposed opposite to the two first copper pillars.

4. The welding tool for insulating substrate of power device module according to claim 3, characterized in that: Two first positioning holes are arranged at intervals at one end of the bottom plate. The first positioning holes are arranged through the thickness direction of the bottom plate and are plugged and matched with the first copper column.

5. The welding tool for insulating substrate of power device module according to claim 4, characterized in that: The other end of the bottom plate is provided with two second positioning holes arranged at intervals. The second positioning holes are arranged through the thickness direction of the bottom plate, are arranged opposite to the first positioning holes, and are plugged and matched with the second copper pillars.

6. The welding tool for insulating substrate of power device module according to claim 5, characterized in that: The limiting mechanism comprises: A first limiting plate, wherein the first limiting plate is arranged on one end of the bottom plate; Two third positioning holes, which are spaced apart at the ends of the first limiting plate and are plugged and matched with the two first copper pillars; A plurality of first protrusions, wherein the plurality of first protrusions are respectively arranged at equal intervals on the inner side of the first limiting plate; Two first baffles are respectively arranged on the inner sides of the first limiting plate opposite to each other.

7. A welding tool for insulating substrate of power device module according to claim 6, characterized in that: The limiting mechanism also includes: a second limiting plate, which is disposed on the other end of the bottom plate and is arranged opposite to the first limiting plate; Two fourth positioning holes, which are arranged at intervals at the ends of the second limiting plate and are plugged and matched with the two second copper pillars; A plurality of second protrusions, wherein the plurality of second protrusions are respectively arranged at equal intervals on the inner side of the second limiting plate; Two second baffles are respectively arranged on the inner sides of the second limiting plate opposite to each other.

8. The welding tool for insulating substrate of power device module according to claim 1, characterized in that: Grooves are respectively arranged on both sides of the heat-conducting plate bottom plate.

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