Copper column convenient to weld

Abstract

The utility model relates to a copper column convenient to weld, which comprises a copper column body, and an annular wave disc base is coaxially arranged at the lower end of the copper column body. Firstly, the contact area of the circular-ring-shaped wave disc base is increased by more than 40% through a multi-peak-valley structure (wave crests and wave troughs are alternated), the solder attachment area is remarkably increased, and the welding firmness is improved; in addition, the wave-shaped outline forms a capillary effect, the welding flux is promoted to be evenly spread along wave crests, air holes or welding flux accumulation is avoided, and the metallurgical bonding quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of copper pillar technology, and in particular to a copper pillar that is easy to weld. Background Technology

[0002] In the field of electronic equipment manufacturing, copper pillars are a common conductive connection element widely used in the soldering processes of printed circuit boards (PCBs), power modules, and high-frequency devices. Traditional copper pillars typically employ a cylindrical body and a flat base design. Due to the limited contact area between the flat base and the substrate, solder wettability is poor, leading to problems such as incomplete soldering or insufficient solder strength. They are particularly prone to loosening and failure under vibration or temperature cycling conditions, and in severe cases, the copper pillar may even detach. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a copper pillar that is easy to weld.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A copper column that is easy to weld includes a copper column body, and a circular wave plate base is coaxially disposed at the lower end of the copper column body.

[0006] In some embodiments, the annular wave plate base is sleeved on the copper column body, and the bottom end of the copper column body extends out of the annular wave plate base to form a step. The bottom wall of the step is recessed into the bottom end of the annular wave plate base, or is flush with the bottom end of the annular wave plate base.

[0007] In some embodiments, the annular wave plate base includes a plurality of wave crests and troughs connected sequentially along the circumference, and a notch is provided at the connection between the wave crests and troughs.

[0008] In some embodiments, four crests and four troughs are provided.

[0009] In some embodiments, the copper pillar body is provided with an internal threaded hole, or the copper pillar body is provided with an external thread.

[0010] In some embodiments, a positioning post is coaxially disposed at the lower end of the step.

[0011] In some embodiments, the lower corner of the positioning post is beveled.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the circular wave plate base increases the contact area by more than 40% through the multi-peak and valley structure (alternating peaks and valleys), significantly increasing the solder adhesion area and improving the welding firmness; in addition, the wave-shaped contour forms a capillary effect, promoting the uniform spread of solder along the peaks, avoiding porosity or solder accumulation, and ensuring the quality of metallurgical bonding. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a front view schematic diagram of the present invention;

[0016] Figure 3 This is a top view of the present invention. Detailed Implementation

[0017] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of this utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0018] like Figures 1-3 The copper column shown is easy to weld and includes a copper column body 1, with a circular wave plate base 2 coaxially arranged at the lower end of the copper column body 1.

[0019] Based on the above structure, firstly, the circular wave plate base 2 increases the contact area by more than 40% through the multi-peak and valley structure (alternating peaks and valleys), significantly increasing the solder adhesion area and improving the welding strength; in addition, the wave-shaped contour forms a capillary effect, promoting the uniform spread of solder along the peaks, avoiding porosity or solder accumulation, and ensuring the quality of metallurgical bonding.

[0020] Specifically, the annular wave plate base 2 is sleeved on the copper column body 1, and the bottom end of the copper column body 1 extends out of the annular wave plate base 2 to form a step 3. The bottom wall of the step 3 is recessed into the bottommost end of the annular wave plate base 2, that is, the bottommost end of the trough portion 22. When the copper column is welded and fixed, it is supported and fixed on the circuit board by the trough portion 22, which increases the solder adhesion area.

[0021] Alternatively, step 3 can be flush with the bottom of the circular wave plate base 2, which can improve the stability when the copper column is fixed.

[0022] The annular wave plate base 2 includes several wave crests 21 and wave troughs 22 connected sequentially along the circumference. A notch 23 is provided at the connection between the wave crests 21 and the wave troughs 22. The wave crests 21 and wave troughs 22 of the annular wave plate base 2 are integrally formed by stamping.

[0023] Preferably, there are four crests 21 and four troughs 22.

[0024] In this utility model, the copper column body 1 is provided with an internal threaded hole 51, or the copper column body 1 is provided with an external thread. The purpose of providing an internal threaded hole 51 or an external thread is to enable the copper column body 1 to cooperate with bolts or nuts for connecting external electronic components, etc.

[0025] In this utility model, a positioning post 61 is coaxially provided at the lower end of the step 3. By setting the positioning post 61, not only can the positioning and installation of the copper column be facilitated, but the stability of the copper column can also be further increased.

[0026] Furthermore, the lower corner of the positioning post 61 is beveled at an angle 71, which facilitates the insertion of the positioning post 61 into the corresponding connection hole on the circuit board.

[0027] Based on the accompanying drawings and the foregoing display and description of the basic principles, main features, and advantages of this utility model, those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A copper pillar that is easy to weld, characterized in that: It includes a copper column body (1), and a circular wave plate base (2) is coaxially arranged at the lower end of the copper column body (1). The circular wave plate base (2) is sleeved on the copper column body (1), and the bottom end of the copper column body (1) extends out of the circular wave plate base (2) to form a step (3). The bottom wall of the step (3) is recessed into the bottom end of the circular wave plate base (2), or is flush with the bottom end of the circular wave plate base (2).

2. The copper pillar that is easy to weld according to claim 1, characterized in that: The circular wave plate base (2) includes several wave crests (21) and wave troughs (22) connected in sequence along the circumference, and a notch (23) is provided at the connection between the wave crests (21) and wave troughs (22).

3. A copper pillar that is easy to weld according to claim 2, characterized in that: The crest (21) and trough (22) are each provided with four.

4. A copper pillar that is easy to weld according to claim 1, characterized in that: The copper pillar body (1) is provided with an internal threaded hole (51), or the copper pillar body (1) is provided with an external thread.

5. A copper pillar that is easy to weld according to claim 1, characterized in that: A positioning post (61) is coaxially provided at the lower end of the step (3).

6. A copper pillar that is easy to weld according to claim 5, characterized in that: The lower corner of the positioning post (61) is beveled (71).

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