... covers an area of 8, 000 square meters and has more than 300 employees, among whom 80% are senior staff members. Since ... 2.Provide PCB &PCBA prototype, and medium&low volume quick board services. 3.Compoent purchasing, SMT/PCBA one-stop source, with the professional ... HALS lead free,Chemical tin,Chemical Gold,Immersion gold Inmersion Silver/Gold,Osp,Gold Plating9Copper thickness0.5-4.0oz10Solder mask ...