The performance and reliability of printed circuit boards (PCBs) are inseparable from precise control over each link in the manufacturing process. Among these, surface treatment is a particularly critical step—its process level directly affects the PCB’s conductivity, corrosion resistance, and interlayer adhesion. As core processes in surface treatment, roughening and micro-etching aim to lay a solid foundation for subsequent plating, soldering, and other processes. However, the long-standing technical challenges in these two steps have always been major obstacles to the industry’s efforts to improve manufacturing quality. The application of Sodium Persulfate provides an effective technical solution to address this core challenge.
Ⅰ. Core Demands and Pain Points of PCB Surface Treatment
The surface treatment of PCBs aims to optimize the substrate surface state through specific processes. The core goals of roughening and micro-etching are to remove impurities and oxide layers from the substrate surface, while forming a uniform and appropriate micro-roughness. This enhances the adhesion between subsequent plating layers and the substrate, avoiding issues such as plating peeling and poor contact.
However, in actual production, traditional micro-etching processes struggle to precisely control treatment uniformity, often leading to local over-corrosion or incomplete treatment. Over-corrosion damages circuits and substrates, affecting electrical performance; incomplete treatment results in insufficient surface cleanliness, reducing plating adhesion and埋下 quality hazards. In addition, some traditional treatment agents suffer from poor stability and high environmental pressure.
Ⅱ. Sodium Persulfate: A Key Solution for Roughening/Micro-Etching Needs
As a neutral oxidant, Sodium Persulfate demonstrates unique value in chlorine-free requirement scenarios, small-to-medium batch production, and flexible PCB processing. Its operational safety is superior to strong acid systems.
In the roughening process, under appropriate process conditions, Sodium Persulfate can effectively remove oxide layers and impurities from the substrate surface. Through controllable etching, it forms a uniform micro-rough surface. The reaction process is stable and controllable, helping to reduce common problems such as over-corrosion or incomplete treatment in traditional methods. In micro-etching, Sodium Persulfate also effectively removes tiny oxidative impurities on the board surface, improving surface cleanliness and activity, and providing stable support for subsequent processes. In the production of Sodium Persulfate, Fujian Zhanhua Chemical always places product quality at the core. The Sodium Persulfate developed and produced by the company excels in key dimensions such as purity and stability, ensuring the treatment effect of roughening and micro-etching processes.
Ⅲ. Reflections of Sodium Persulfate’s Application Compatibility
The advantages of Sodium Persulfate in PCB surface treatment also lie in its excellent process compatibility. It has good versatility—by adjusting parameters such as concentration, temperature, and treatment time, it can adapt to PCBs of various specifications and materials. This reduces the complexity of developing brand-new treatment solutions for different substrates. At the same time, it has good compatibility with a variety of auxiliary treatment materials, which helps ensure the stability of the entire surface treatment process. This characteristic allows it to quickly integrate into existing production systems, eliminating the need for enterprises to conduct large-scale equipment modifications and lowering the application threshold. As an enterprise deeply engaged in the persulfate field, Fujian Zhanhua Chemical’s Sodium Persulfate performs outstandingly in adapting to different process scenarios, providing strong support for enterprises to achieve efficient and stable surface treatment.
The challenges of roughening and micro-etching processes have long restricted the improvement of PCB manufacturing quality. With its stable treatment effect and good process compatibility, Sodium Persulfate offers a reliable choice for optimizing surface treatment. However, to achieve good application results, selecting high-purity, stable Sodium Persulfate products is crucial. As an enterprise with the "7th Batch of Manufacturing Single Champion Product (Sodium Persulfate)" certified by the Ministry of Industry and Information Technology, Fujian Zhanhua Chemical has mature production processes and strict quality control systems. It can provide stable material guarantees for the industry and promote quality upgrading in the PCB manufacturing link—backed by the professional strength of Fujian Zhanhua Chemical and high-performance Sodium Persulfate products.