Sodium persulphate serves as a potent oxidising and bleaching agent. A notable application of this compound is in the production of printed circuit boards, where it plays a pivotal role in cleaning and etching the boards in preparation for the currentless copper deposition process. The core benefit of sodium persulphate in this context is its ability to enhance the roughness of the wafer's surface. This increased texture ensures a robust bond between the applied copper and the wafer, all while maintaining the integrity of the wafer's plastic material.