... Accepted HDI pcb, 8 Layers PCB, Impedance pcb,pcb exporter,PCB Manufacturer, Printed Circuit Board, Immersion Silver pcb,Prompt Delivery,Quickly Quotation,Excellent Service RoHS PCB, PCB Material1.Base ... Material:FR-42.Number of Layers:8-layers3.Copper Thickness:35um4.Board Thickness ...