Plating is a surface treatment technology that forms a thin film of metal or non-metal on the surface of a substrate. This complements and enhances the properties of the substrate, imparting functionalities and aesthetics such as rust prevention, wear resistance, electrical conductivity, heat resistance, and decorative appeal. Its applications are extensive, including automotive parts, electronic components, building materials, and decorative items. Representative processing methods include electroplating, electroless plating, and hot-dip plating (e.g., hot-dip galvanizing), while vacuum plating methods like PVD (Physical Vapor Deposition) and CVD (Chemical Vapor Deposition) are also recognized as broad categories of plating technology. It is a fundamental technology essential for improving product reliability and increasing added value.