Carrier and clamp for producing same

Abstract

The utility model discloses a carrier. The carrier comprises a carrier body; a plurality of holes are formed in the bearing face of the carrier body in an array mode, a soft coating is formed on the bearing face of the carrier body, and the soft coating has elasticity. The elastic soft coating is formed on the bearing surface of the carrier body, so that generation of carrier pits and DBC mother board pits can be effectively reduced, and the polyurethane coating is adopted, so that holes can be reserved for vacuum suction, and pits can be prevented from being formed in the DBC mother board.

Description

TECHNICAL FIELD

[0001] The utility model relates to DBC mother board production technical field, concretely relates to a carrier and the clamp for producing the carrier. BACKGROUND

[0002] In the IGBT (English full name: Insulate-Gate Bipolar Transistor, for short: IGBT, Chinese: Insulated Gate Bipolar Transistor) module tin paste process production process, it is divided into patch, bonding, cleaning, glue filling, shell sealing and so on. When patching, tin paste needs to be printed on DBC (English full name: Direct Bond Copper, for short: DBC, Chinese: Copper Clad Ceramic Substrate) mother board, in order to ensure the accuracy of printing, the DBC mother board needs to be tightly adsorbed on the carrier in the printing machine by vacuum, and then the doctor blade is used to press the steel mesh by scraping to make the tin paste stay on the DBC mother board to facilitate the subsequent chip welding.

[0003] Due to the reasons of cost saving and production practice, the carrier is generally made of aluminum alloy material which is cheap and light in quality. The carrier is often bumped during carrying and conveying, which inevitably leads to various pits and protrusions in the carrier. Since the material of the back of the DBC mother board is mainly copper (Cu), and the Cu material is relatively soft, when the Cu material meets the protruding aluminum carrier, pits are easily produced due to the vacuum suction force from below and the pressure of the doctor blade from above.

[0004] Therefore, it is urgent to find a method to solve the above problems. INVENTION CONTENTS

[0005] In view of the above problems existing in the prior art, a carrier and a clamp for producing the carrier are provided.

[0006] The specific technical solutions are as follows:

[0007] A carrier mainly comprises a carrier body.

[0008] A plurality of holes are arranged on the bearing surface of the carrier body in an array, and the bearing surface of the carrier body is formed with a soft coating layer, and the soft coating layer has elasticity.

[0009] In the above-mentioned carrier, the carrier body has a bearing groove, and the groove bottom surface of the bearing groove is the bearing surface.

[0010] In the above-mentioned carrier, the soft coating layer is a polyurethane coating layer.

[0011] The aforementioned vehicle also has the characteristic that the thickness of the polyurethane coating is 0 to 0.1 mm.

[0012] One of the aforementioned vehicles also has the characteristic that the vehicle body is made of a rigid material.

[0013] A clamp for manufacturing the aforementioned vehicle, the clamp comprising a clamp body having a plurality of protrusions adapted to the holes of the vehicle body, the protrusions being extendable into the holes.

[0014] One of the aforementioned clamps also has the feature that the clamp body can be inserted into the carrier body.

[0015] The positive effects of the above technical solution are:

[0016] The present invention provides a carrier in which the bearing surface of the carrier body is formed with an elastic soft coating, which can effectively reduce the generation of pits in the carrier and DBC motherboard. The polyurethane coating can retain pores for vacuuming and can also prevent pits from forming in the DBC motherboard. Attached Figure Description

[0017] Fig. 1 A structural schematic diagram of a vehicle provided by this utility model;

[0018] Fig. 2 A schematic diagram of the structure of a clamp provided by this utility model;

[0019] Fig. 3 This is a schematic diagram of the assembly structure of the carrier and clamp provided by this utility model.

[0020] In the attached diagram: 1. Carrier body; 11. Bearing groove; 111. Bearing surface; 12. Hole; 2. Clamp body; 21. Protruding column. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figs. 1 to 3 This utility model first discloses a vehicle, including: a vehicle body 1;

[0025] The bearing surface 111 of the vehicle body 1 is provided with a plurality of holes 12 arranged in an array, and the bearing surface 102 of the vehicle body 1 is formed with a soft coating layer, which is elastic.

[0026] The vehicle body 1 has a bearing groove 11, and the bottom surface of the bearing groove 11 is the bearing surface 111.

[0027] Optionally, in this embodiment, the soft coating is a polyurethane coating.

[0028] Optionally, in this embodiment, the thickness of the polyurethane coating is 0 to 0.1 mm (excluding 0).

[0029] Optionally, the vehicle body 1 is made of a rigid material. For example, the vehicle body 1 is made of aluminum.

[0030] The flexible coating is molded from waterborne polyurethane (WPU), a novel polyurethane system that uses water as a solvent. It is characterized by being pollution-free, safe, reliable, possessing excellent mechanical properties, good compatibility, and easy modification. Not only is it environmentally friendly, but it also exhibits excellent adhesion and waterproofing properties, making it suitable for various substrates, such as mortar, cementitious surfaces, stone, and metal products. Furthermore, waterborne polyurethane has wide applications in leather finishing agents, coatings, and adhesives, due to its low viscosity, non-flammability, chemical resistance, and environmental friendliness.

[0031] The specific molding method of this carrier is as follows: First, the holes 12 inside the carrier body 1 used for vacuum suction are plugged with a clamp (described later). Then, an appropriate amount of WPU is poured into the rigid carrier body 1. Subsequently, the rigid carrier body 1 is placed on a heating plate at 60°C and heated for 20 minutes to dry the solution-based waterborne polyurethane into a soft polyurethane coating. The thickness of this coating is only about 0-1.0 mm, so it will not affect the printing process. At the same time, because the polyurethane coating has a certain degree of elasticity, it can effectively reduce the pitting of the rigid carrier body 1 itself and the pitting of the DBC motherboard. Because the waterborne polyurethane has a certain degree of adhesion to the rigid carrier body 1 during the drying process, it is not easy to peel off from the rigid carrier body 1. Also, because the dried polyurethane has low viscosity, it is not easy to adhere to the DBC motherboard. If replacement is required, the rigid carrier body 1 can be placed in an ultrasonic cleaner and ultrasonically cleaned for 10 minutes to completely peel off the polyurethane coating for replacement.

[0032] In use, the DBC motherboard is placed into the carrier slot 11 of the carrier. After it is placed, it is put into the conveyor belt and then into the printing press. The printing press is then started to complete the stencil printing.

[0033] The present invention provides a carrier in which the bearing surface 111 of the carrier body 1 is formed with an elastic soft coating, which can effectively reduce the generation of pits in the carrier and DBC motherboard. The polyurethane coating can retain pores for vacuuming and can also prevent pits from forming in the DBC motherboard.

[0034] This utility model also discloses a clamp for manufacturing the aforementioned vehicle. The clamp includes a clamp body 2, which has a plurality of protrusions 21 that are adapted to the holes 12 of the vehicle body 1. The protrusions 21 can extend into the holes 12.

[0035] Furthermore, the clamp body 2 can be inserted into the carrier body 1.

[0036] like Fig. 3 As shown, Fig. 3This is a schematic diagram of the assembly structure of the carrier and clamp provided by this utility model. The clamp body 2 is inserted into the bearing groove 11 of the carrier body 1, the protrusion 21 is inserted into the hole 12 and the protrusion 21 blocks the hole 12, and then an appropriate amount of water-based polyurethane solution is poured in so that the surface of the carrier body 1 is evenly coated with a layer of water-based polyurethane solution, and then placed on a 60°C heating plate to dry for 20 minutes to form an extremely thin polyurethane coating.

[0037] The clamp provided by this utility model can easily and simply manufacture the carrier provided by this utility model.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A vehicle, characterized in that, include: Vehicle body; The bearing surface of the vehicle body is provided with a plurality of holes arranged in an array, and the bearing surface of the vehicle body is formed with a soft coating, the soft coating being elastic; The soft coating is a polyurethane coating.

2. The vehicle according to claim 1, characterized in that, The vehicle body has a bearing groove, and the bottom surface of the bearing groove is the bearing surface.

3. The vehicle according to claim 2, characterized in that, The thickness of the polyurethane coating is 0 to 0.1 mm.

4. The vehicle according to claim 1, characterized in that, The vehicle body is made of a rigid material.

5. A clamp for manufacturing a vehicle according to any one of claims 1 to 4, characterized in that, The clamp includes a clamp body having a plurality of protrusions adapted to the holes of the carrier body, the protrusions being able to extend into the holes.

6. The clamp according to claim 5, characterized in that, The clamp body can be inserted into the vehicle body.

Images