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Analysis of the causes of poor electroplating of pogo pins

source:Industry News    Popular:pogo pin for moilble phone     release time:2022-02-23 09:01:44     Article author:sznbone

  Analysis of the causes of poor electroplating of pogo pins(图1)

  Pogo pins are generally used for precision connections in electronic products such as mobile phones, communications, automobiles, aerospace and other electronic products. Since the pogo pin is a very fine probe, the volume can be made very small, so it is used in the analysis of the reasons for poor electroplating of fine pogo pins. (Figure 1) In the dense connector, the weight of the connector can be reduced, space saving, and beautifying the appearance of products (such as ultra-thin mobile phones, smart wearables, drones, smart robots, etc.).

  In the pogo pin electroplating, due to the high electrical performance requirements of the contact pair, the gold plating process plays an obvious important role in the pogo pin electroplating. At present, except for some strip spring thimbles that use selective gold plating, the gold plating in the holes of a large number of pinhole parts is still carried out by barrel plating and vibration plating. In recent years, the size of connectors has become more and more miniaturized, and the quality of gold plating in the holes of pinhole parts has become increasingly prominent. Users have higher and higher quality requirements for the gold layer, and some users are concerned about the appearance quality of the gold layer. Even to the point of being very picky. In order to ensure the quality bonding force of the gold-plated layer of the connector, these common quality problems are always the key to improving the quality of the gold-plated layer of the connector. Below, the editor of Tyco Hanze manufacturer will analyze the causes of these quality problems one by one and provide you with discussion.

  1. The color of the gold layer is abnormal

  The color of the gold-plated layer of the pogo pin is inconsistent with the normal gold layer color, or the gold layer color of different parts in the same accessory product is different.

  2. Influence of raw material impurities

  When the impurities brought in by the chemical materials added to the plating solution exceed the tolerance level of the gold plating solution, the color and brightness of the gold layer will soon be affected. If it is affected by organic impurities, the gold layer will appear dark and flowery. The position of the dark and flowered pieces is not fixed. If the metal impurities interfere, the effective range of the current density will be narrowed. .Reflected to the plated parts, the coating is red or even black, and the color change in the hole is obvious.

  3. The current density is too large

  Due to the incorrect calculation of the total area of the plating tank parts, the value is larger than the actual surface area, the gold plating current is too large, or the amplitude of the gold plating is too small when the vibration plating is used, so that all or part of the gold plating in the tank has rough crystals, and the gold plating is visually impaired. layer redness.


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