The copper plating of printed circuit boards can be divided into two stages: primary copper plating and secondary copper plating. Among them, primary copper plating is divided into through-hole treatment and thickening. The through-hole treatment is carried out by using a chemical copper plating solution to metallize the holes. During the hole metallization process, some faults may occur, such as no copper layer deposition on the hole wall. Let's analyze the causes and troubleshooting methods of this fault.
Failure of the components of the chemical copper plating solution
The components of the chemical copper plating solution are numerous. But which components can affect the deposition of the coating? According to our experience, they are copper salts and alkaline solutions.
Copper salts can provide the copper ions required for chemical copper plating. If the concentration is too low, it will affect the normal plating process. Therefore, it needs to be maintained within a certain range. As the concentration increases, the deposition rate of chemical copper plating also increases. However, when the concentration exceeds a certain level, the increase in the deposition rate gradually slows down or even stops. In this case, it may cause incomplete plating on the hole wall.
It should be noted that excessively high copper salt content may cause side reactions, intensify the side reactions of the plating solution, affect the stability of the plating solution, and lead to premature decomposition of the plating solution.
Therefore, when using Bigely chemical copper plating solution, you can consult our engineers on how to analyze and replenish the copper salts.
About us
Guangdong Bigely Technology Co., Ltd. ,founded in 2003, is a high-tech enterprise integrating R & D，production, sales and service, specializing in the production of electroplating chemicals. As a fast growing electroplating chemicals supplier in China, Bigely has over 20 years' experience in electroplating additives production and own production base of 5000 square meters. We can produce 15,000 tons of electroplating additives every year, which can fully meet the needs of customers.
If you need our high-quality electroplating additives, please contact us. We can provide you samples for test, and also provide a series of services.
