The connector, an electrical device is used for transmission of current or signal. To use this technology does not need to weld the end of two parts together, it makes more efficiency and convenience on manufacturing and operating. There are three major performance of connectors, mechanical part, such like plug times; in electrical properties such as resistance, and the resistance to environment like temperature, humidity. These performances have a great relationship with the manufacturing process and design. There are four main processes in the production: stamping, plating, injection molding and assembly. SST provides chemicals and additive for pre-treatment and plating.