... 4.100% e-test double side CEM-3 material PCB, flash gold platingWhat we can do for you, ... One-stop services from PCB manufacture to components supply, assembly services offer.1 ... -12 layer PCB board,1-2 layer Aluminum base PCB1/3oz ... PCB board,CEM-1,CEM-3, FR4, FR4 High TG, High CTI, PTFE, Ceramics, Aluminum based etc. double side CEM-3 material PCB ...