Pogo pins are usually used for precision connections in electronic products such as mobile phones, communications, automobiles, aerospace, etc. . Because pogo pin is a very thin probe, the volume can be very small, so it can be used for precision connectors to reduce the weight of the connector, save space, beautify the appearance of products (such as: ultra-thin mobile phones, smart wearable devices), unmanned Machines, intelligent robots and other products.
In the plating of pogo pins connectors, due to the high electrical performance requirements of the contacts, gold plating The craft obviously occupies an important position in the electroplating of the pogo pin connector. At present, in addition to the selective gold plating process used in some pogo pin connectors, barrel plating and vibration plating are still used for gold plating in the holes of a large number of pinhole parts. In recent years, the size of connectors has become more and more miniaturized, and the quality of gold plating at pinholes has become more and more important. Users have higher and higher requirements for quality. Some users are worried about the appearance of connectors. The gold layer has even reached a very critical level. In order to ensure the quality of the connector gold plating, these common quality problems are always the key to improving the connector gold plating quality.
1. The color of the gold layer is abnormal
The color of the gold-plated layer of the pogo pin connector is inconsistent with the normal color of the gold layer, or the color of the gold layer of different parts in the same accessory product is different.
2. The impact of raw material impurities
When the impurity brought by the chemical material added to the plating solution exceeds the tolerance of the plating solution, it will quickly affect the color and brightness of the gold layer. If it is affected by organic impurities, gold will appear For the phenomenon of layer dullness and blooming, the location of the darkening and blooming on the Haul slot test piece is not fixed. If the interference of metal impurities will cause the effective range of the current density to narrow, the Haul slot test shows that the current density of the test piece is the low end It is not bright or the high-end plating is not bright and the low-end plating is not bright. It is reflected that the plating layer is reddish or even black on the plated parts, and the color changes in the holes are more obvious.
3, the current density is too large
Due to the calculation error of the total area of the plating tank parts, the value is greater than the actual surface area, which makes the plating current too large, or the amplitude is too small when vibrating plating is used, so the tank is All or part of the gold plating of the plated parts has rough crystals, and the gold layer is reddish visually.