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Electronic-Grade Potassium Monopersulfate

• Hydrometallurgy for PCBs is divided into acidic and alkaline methods：

-The acidic method is more precise and cost-effective but time-consuming. This method is suitable for inner layers because acids do not react with photoresists and will not damage the required parts.

-The alkaline method is used for etching the outer layers of PCBs. It is a fast process but more expensive, and it is essential to carefully follow the process parameters because prolonged contact with the solvent can damage the circuit board.

Existing Etching Solutions

Existing etching solutions typically use hydrogen peroxide or sodium persulfate as the oxidizing agents to remove excess graphite, carbon black, and metal impurities in the processes of wiring printing, micro-etching, and circuit board cleaning. Hydrogen peroxide oxidizes the metals, partially decomposes them, and then converts them into soluble compounds. For instance, products based on sodium persulfate can be combined with sufficient sulfuric acid to create a micro-bath, with 100-300 grams of sodium persulfate per liter of deionized water, containing approximately 1% to 10% by weight of sulfuric acid. However, technicians have recently discovered that Potassium Monopersulfate can serve as an excellent alternative because it contains both the necessary oxidizing agent and sulfuric acid.

James Chem, Your Trusted Partner

We not only have standardized products but also provide a one-on-one customized solution. No matter what challenges we meet, we solve them together. Should you have any questions or needs related to PCB etching, please do not hesitate to contact our domain experts.