... free Materials(RoHS Compliant)/CEM-3/CEM-1/AluminiumLayersingle layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm ... Thickness0.7mil,raised H≤0.05Colour green,blue,red,yellow,black,white(LPI/MATT.,UL 94 V0 approved) Surface Finish HALtin ... percent97% pass for the first time,+/-2%(tolerance) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! 4 Layer PCB for dvd decoder ...