Positioning and clamping tool for protecting a DBC substrate

Abstract

The utility model relates to a positioning and bonding tool for protecting DBC substrate, which comprises a main plate body, a sink groove part provided on the main plate body, a plurality of hollow parts provided on the sink groove part, and an intermediate horizontal plate provided between adjacent hollow parts. The one-way hinge and the intermediate horizontal plate are made of metal. Side plates are provided on both sides of the hollow parts, and the surfaces of the side plates are flush with the bottom surface of the sink groove part. The DBC substrate is placed in the sink groove part. The utility model has reasonable design, compact structure and convenient use.

Description

Technical Field

[0001] This utility model relates to a positioning and bonding fixture for protecting DBC substrates, suitable for bonding processes of ceramic copper-clad laminates, ceramic substrates and high-power MOS or IGBT modules. Background Technology

[0002] Because the module base plate and frame of the DBC substrate are designed separately, and the frame is mostly made of plastic, it cannot withstand the high temperature of over 200°C in the lamination process. The separate base plate and DBC lamination will easily cause errors in the positioning of the DBC substrate during the lamination process, which will cause the DBC substrate to collide with the ceramic and be damaged or even cracked, reducing the first-pass yield and increasing the product rework rate.

[0003] The existing DBC substrate module is inconvenient to remove; it needs to be cooled before it can be taken out, and clamping it is also inconvenient. Utility Model Content

[0004] In general, the technical problem this invention aims to solve is to provide a positioning and assembly fixture for protecting the DBC substrate. Addressing the current issues with misalignment during the assembly of the DBC substrate and the power module baseplate, this invention uses a metal frame to position the DBC substrate, ensuring proper subsequent assembly; it also incorporates rectangular strips between the DBC substrates for accurate positioning, preventing collisions that could cause ceramic cracking; and the fixture is made of aluminum alloy, preventing soldering during assembly and improving the reusability of the material in high-temperature environments.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A positioning and assembly fixture for protecting a DBC substrate includes a main board body; a recessed portion is provided on the main board body; and a plurality of cutout portions are provided on the recessed portion.

[0007] A middle horizontal plate is set between adjacent hollow sections.

[0008] As a further improvement to the above technical solution:

[0009] The one-way hinges and the middle crossbar are made of metal.

[0010] Side plates are provided on both sides of the hollow section; the surface of the side plates is flush with the bottom surface of the groove section;

[0011] The DBC substrate is placed in the settling tank.

[0012] The four corners of the settling tank are rounded.

[0013] Bases are provided on both sides of the lower part of the motherboard body;

[0014] The base is supported by columns on both sides;

[0015] A movable frame is slidably mounted on the column;

[0016] A connecting plate connects the two movable frames on both sides;

[0017] Several protruding pillars are provided on the upper surface of the connecting plate;

[0018] The raised column is located below the hollowed-out section;

[0019] A handle is provided on the outside of the movable frame;

[0020] A spring is connected between the movable frame and the main board.

[0021] Rotating pillars are connected to the four corners of the upper part of the main body;

[0022] A pressure rod is fitted onto the rotating column;

[0023] The lower surface of the pressure rod is provided with a guide slope for pressing down the four corners of the DBC substrate.

[0024] A one-way hinge is hinged to the side of the motherboard body;

[0025] A groove is provided on the main body on the lower outer side of the one-way hinge.

[0026] When in operation, the protruding column is located below the hollowed-out section;

[0027] When picking up the package, the protruding column moves upward, pushing the DBC substrate upward and mounting it on the one-way hinge;

[0028] A torsion spring is provided in the one-way hinge.

[0029] This invention positions the DBC substrate by adding a metal frame and prevents collisions between DBCs by adding rectangular strips. This invention is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving, labor-saving, cost-effective, compact in structure, and easy to use. The following detailed embodiments further illustrate the technical effects of this invention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the motherboard structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the deformable structure of the motherboard body of this utility model.

[0032] The components include: 1. Main body; 2. Slotted section; 3. Hollowed-out section; 4. Middle horizontal plate; 5. Side plate; 6. Base; 7. Movable frame; 8. Connecting plate; 9. Handle; 10. Spring component; 11. Protruding column; 12. Rotating column; 13. Pressing rod component; 14. Guide slope; 15. One-way hinge; 16. Process groove. Detailed Implementation

[0033] like Figure 1 , Figure 2 The positioning and assembly fixture for protecting the DBC substrate in this embodiment includes a main body 1, which is preferably rectangular in structure, so as to facilitate processing and manufacturing and have a stable structure; a groove 2 is provided on the main body 1; a plurality of hollow parts 3 are provided on the groove 2, which are milled to ensure the uniformity of the flatness of the substrate.

[0034] A middle horizontal plate 4 is provided between adjacent hollow sections 3 to enhance structural stability.

[0035] The one-way hinge 15 and the middle cross plate 4 are made of metal to ensure uniform heating.

[0036] Side plates 5 are provided on both sides of the hollow part 3; the surface of the side plates 5 is flush with the bottom surface of the sink 2;

[0037] The DBC substrate is placed in the settling tank 2.

[0038] The four corners of the settling tank 2 are rounded to facilitate processing and ensure that the substrate is completely placed in the settling tank.

[0039] like Figure 1 Its entirety, as the point of invention, solves the shortcomings of existing technologies.

[0040] As a further improvement, to facilitate the removal of the substrate and ensure its secure fixation.

[0041] Bases 6 are provided on both sides of the lower part of the main body 1; they serve as guide supports and base supports, thereby facilitating connection and fixation with other tooling.

[0042] The base 6 has columns on both sides; a movable frame 7 is slidably mounted on the columns; it can be used with conventional track sliders to facilitate lifting and lowering.

[0043] As a technical feature of the invention, a connecting plate 8 is connected between the two movable frames 7; and several protruding columns 11 are provided on the upper surface of the connecting plate 8.

[0044] The protruding column 11 is located below the hollowed-out part 3;

[0045] A handle 9 is provided on the outside of the movable frame 7;

[0046] A spring 10 is connected between the movable frame 7 and the main board 1.

[0047] It can lift the substrate off the sink, which is convenient, quick, and reduces cooling time.

[0048] As an innovation, rotating pillars 12 are connected to the four corners of the upper part of the motherboard body 1;

[0049] A downward pressure rod 13 is fitted onto the rotating column 12;

[0050] The lower surface of the pressing rod 13 is provided with a guide slope 14 for pressing down the four corners of the DBC substrate.

[0051] It achieves fixation and separation of the substrate by rotating the column, and the inclined surface can achieve better contact with the substrate surface.

[0052] As a further improvement, when the hand is released, the movable frame 7 slides down under the action of spring and gravity, and since one person's two hands are already occupied, another person is needed to help to pick up the substrate.

[0053] To reduce the need for human intervention, a one-way hinge 15 is hinged to the side of the main body 1. When the protruding post 11 is pushed up, it folds upward, allowing the substrate to pass through. After passing through, the hinge returns to a horizontal position, lifting the substrate. Under the action of springs and gravity, the protruding post falls down, allowing one person to complete the task.

[0054] A process groove 16 is provided on the lower outer side of the one-way hinge 15 on the main board 1. When the hinge is flipped 90 degrees, it can be easily reset through the groove, and the hinge is unidirectionally limited by the upper surface of the main board.

[0055] When in operation, the protruding column 11 is located below the hollowed-out part 3;

[0056] When picking up the item, the protruding post 11 moves upward and pushes the DBC substrate upward, and it is mounted on the one-way hinge 15 through the one-way hinge 15;

[0057] Preferably, a torsion spring is provided in the one-way hinge 15 to achieve automatic reset.

[0058] like Figure 1 , Figure 2 The working principle is as follows: after slightly tilting the substrate, it is placed into the sink 2. The rotating column 12 is rotated, and the pressing rod 13 is fixed by the guide inclined surface 14. After the operation is completed, the pressing rod 13 is opened, and the handle 9 is lifted by a robot or by hand to overcome the preferred spring 10 and its own weight. The connecting plate 8 drives the protruding column 11 to push up the lower surface of the substrate, so that the substrate leaves the sink. When the substrate rises above the one-way hinge 15, the one-way hinge 15 resets to support it, and the protruding column falls down by itself, so as to facilitate the removal of the substrate.

[0059] This utility model is described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed one by one.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of this utility model can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. All technical contents not described in detail in this utility model are publicly known technologies.

Claims

1. A positioning and assembly fixture for protecting a DBC substrate, characterized in that: Includes a main board body (1); a recessed part (2) is provided on the main board body (1); and a plurality of hollow parts (3) are provided on the recessed part (2); A middle horizontal plate (4) is provided between adjacent hollow sections (3).

2. The positioning and assembly fixture for protecting the DBC substrate according to claim 1, characterized in that: The one-way hinge (15) and the middle cross plate (4) are made of metal.

3. The positioning and assembly fixture for protecting the DBC substrate according to claim 1 or 2, characterized in that: Side plates (5) are provided on both sides of the hollow part (3); the surface of the side plates (5) is flush with the bottom surface of the sink (2); The DBC substrate is placed in the sink (2).

4. The positioning and assembly fixture for protecting the DBC substrate according to claim 3, characterized in that: The four corners of the settling tank (2) are rounded.

5. The positioning and assembly fixture for protecting the DBC substrate according to claim 4, characterized in that: Bases (6) are provided on both sides of the lower part of the main body (1); The base (6) has columns on both sides; A movable frame (7) is slidably installed on the column; A connecting plate (8) is connected between the two movable frames (7); Several protruding columns (11) are provided on the upper surface of the connecting plate (8); The protruding column (11) is located below the hollowed-out part (3); A handle (9) is provided on the outside of the movable frame (7); A spring (10) is connected between the movable frame (7) and the main body (1).

6. The positioning and assembly fixture for protecting the DBC substrate according to claim 5, characterized in that: Rotating pillars (12) are connected to the four corners of the upper part of the main body (1); A pressing rod (13) is fitted onto the rotating column (12); The lower surface of the pressing rod (13) is provided with a guide slope (14) for pressing down the four corners of the DBC substrate.

7. The positioning and assembly fixture for protecting the DBC substrate according to claim 6, characterized in that: A one-way hinge (15) is hinged to the side of the main body (1); A process groove (16) on the main body (1) is provided on the lower outer side of the one-way hinge (15).

8. The positioning and assembly fixture for protecting the DBC substrate according to claim 7, characterized in that: When in operation, the protruding column (11) is located below the hollow part (3); When picking up the item, the protruding post (11) moves upward and pushes the DBC substrate upward, and it is mounted on the one-way hinge (15) through the one-way hinge (15); A torsion spring is provided in the one-way hinge (15).

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