... supply PCB production and PCB assembling, including material purchasing, test, 2 Layers pcb,packing ... and quick delivery 12 Layers pcb Technical requirements:Material: FR-4Layer: 2 layerSurface treatment: Immersion goldSoldermask ... ,TACONIC ,ARLON) Halogen-free Material19Other test Impedance,,Testing,Resistance,,Testing, Microsection etc., 20Special technological requirementBlind & Buried Vias ...