PCB News - What material is the component pin

What material is the component pin

PCB factory: Pins, also called pins, are the wiring that connects the internal and peripheral circuits of the integrated circuit. Interface is the collective name for all pins. Physically, we divide the pins into parts such as the toe and the bottom of the foot. What material is the pin of the component? Take a capacitor as an example. Today, I will focus on the composition of the pin of the capacitor!

capacitance

Under normal circumstances, the lead materials of electronic components generally use copper feet, tin-plated copper-clad steel wires, etc. According to the function and quality of the capacitor, the material of the pin will change accordingly.

1. The level of quality
High-quality capacitor pins will be electroplated tin to form the pins, more accurately cold-plated tin. Cold tinned pins are very easy to adsorb tin atoms after energizing, so that the tin layer is easy to control, and the solderability is good; it is not easy to oxidize during production and produces less tin dust; compared with hot tinning, The adhesion and continuity of cold tin plating are much better. The only disadvantage of such cold-tinned capacitor feet is that the price is relatively high.
Low-quality capacitor pins generally use hot tinning, and the price of hot tinning materials is particularly friendly, but there are some obvious shortcomings that follow. Hot-dip tinning, as the name implies, immersing tin on the surface of a conductor after being melted at a high temperature is a physical process. The stability of the tin layer of such a wire is poor; it is not easy to control the thickness of the dipping tin layer, which leads to the rough surface of the wire body; the continuity and adhesion cannot be compared with cold tin plating; and there will be comparisons during processing. A lot of tin dust; there is one of the most fatal shortcomings, the capacitor feet are prone to black oxidation.

2. Large current, high frequency capacitor
Capacitors have many uses, including use in high-voltage, high-frequency, and high-flow situations. In order to achieve a better connection effect, the capacitor in this case will be made of copper pins as the lead material. Similar to cold tinning, the copper pins have a stable effect as a lead material, but they have the same disadvantage: expensive.

What material is the component pin

It is not difficult to see from this article that traditional technicians have compared and studied the pin materials of a small component in both vertical and horizontal directions. Combining the considerations of physics and engineering, the technicians can choose the pin material. Optimal solution. The editor also hopes that this article will give you a certain understanding of the pin materials.

iPCB is a high-tech manufacturing enterprise focusing on the development and production of high-precision PCBs. iPCB is happy to be your business partner. Our business goal is to become the most professional prototyping PCB manufacturer in the world. Mainly focus on microwave high frequency PCB, high frequency mixed pressure, ultra-high multi-layer IC testing, from 1+ to 6+ HDI, Anylayer HDI, IC Substrate, IC test board,rigid flexible PCB, ordinary multi-layer FR4 PCB, etc. Products are widely used in industry 4.0, communications, industrial control, digital, power, computers, automobiles, medical, aerospace, instrumentation, Internet of Things and other fields.