... and competitive price 1. 2-layer TG140 PCB;2. Hard Gold (Au: 50u")3. Blue SolderMask;4. High quality&competitive price5 ... . Gold plating, electroless plating6. ROHS,UL,SGS,ISO9000, ISO 14000, TS169497. ... -precision printed circuit boards. We have more than 10,000 square meters,with more than 500 professional employees,monthly capability is ...