... PCBA manufacturer,and we do R&D and contract manufacturing for the medical,instrument, environmental, industrial, networking,automotive, aeronautics, ... Our services sell well in China, the European Union, North America, the Middle East, South Korea and other ... HASL), ENIG (ELectroless Nickel Immersion Gold), OSP, Immersion Silver,Immersion Tin, Immersion Nickel, Hard Gold, OtherCopper Weight0.5OZ ...