... copper:1ozSolder mask:green;Material:FR4.7 group impedance control,3BGA;Certificates:CQC,ISO.TS16949,SGS,ISO9001,UL,ISO. ... pcb board production;6--"5S"and ISO.TS16949 quality system control manufacture;7--professional,high communication,trustworthy;8--all kinds ... electronics,such as Central Server electronics device ,smart home control servers electronics,security control electronics and others;