A customer inquired that during the production process using acid copper brightener, the concentration of chloride ions in the plating solution was too low, and the coating in the low current area of the workpiece showed a lack of luster. After adding hydrochloric acid, the chloride ion concentration could reach the normal range, and the coating could regain its luster. However, chloride ions are consumed quickly, and a large amount of hydrochloric acid needs to be added. Such an operation may lead to other consequences and increase production costs.
Based on on-site experience and the characteristics of the product, acid copper brightener Cu-510, Bigely Technology conducted an analysis. By adding a large amount of hydrochloric acid to maintain the concentration of chloride ions within the normal range, it indicates that the consumption of chloride ions in the plating solution is high. However, if the concentration of chloride ions is too high, it will increase the consumption of brighteners, which indicates that chloride ions will react with brighteners, and excessive chloride ions will be consumed. Excessive brightener in the plating solution will also consume chloride ions. This is because either too low chloride ions or too much brightener in the plating solution can cause the fault phenomenon of the coating not being bright in the low current area. Therefore, the main reason for the rapid consumption of chloride ions in the plating solution is that the concentration of the brightener is too high.
Therefore, during the production process, the addition of brightener can be controlled by using a hull bath for wafer making, and the principle of adding frequently but in small amounts should be followed to avoid excessive brightener in the plating solution. Regular use of activated carbon to treat the plating solution can prevent the rapid accumulation of organic decomposition products in the plating solution and can reduce the amount of brightener used. In this way, if the brightener in the plating solution is replenished and maintained properly, as long as the chloride ion concentration is within the process range, the phenomenon of large chloride ion consumption and non-brightness in the low current area will not occur.
Therefore, in the production process of using acid copper brightener, we must strictly control the concentration of chloride ions and brightener within the normal range to maintain the stability of the plating solution, which can effectively reduce the occurrence of faults and save production costs. If you are interested in acid copper brightener, please contact Bigely customer service to get free samples and detailed technical data.
