rigid pcb with 2layers immersion gold surface

rigid pcb 1.semi-ring board with 2layers 2.surfaced by immersion gold 3.Transportation by air,by ship ,by express,up to you 4.Normally package:inner packaged by Vaccum ,out by the carton 5.high quality and best price Relative products specification for your reference: DescriptionDetailsSpecificationBaseMaterialFR-4,Aluminium-backedboard,Halogen-free,Lead-freecompatible,HighTg,HighCTI,CEM-1,CEM-3etc.MassproductionSampleMaxDimension630x530mm630x530mmCopperthicknessofinnerlayer18-140um18-210umCopperthicknessofouterlayer12-210um12-210umMin.Annularring0.10mm0.08mmMin.soldermaskclearance0.05mm0.05mmMin.soldermaskclearance0.045mm0.03mmImpedancetolerance±10%±8%Finishedboardthickness0.25mm-3.5mm0.20mm-4.0mmOutlineprecision±0.1mm±0.08mmLayersNo.2-12layers2-14layersInnerlayercircuit4/4mil4/3milor3/4milOutlayercircuitwidth/spacing4/4mil4/3milor3/4milBoardThickness0.1-1.6mm0.075-1.6mmMin.drillbitsize0.2mm0.15mmAspectratio8:0110:01SurfaceFinishedtypeHASL,Flashgolds,ENIG,OSP(leadfreecompatible),Carbonink,PeelableS/M,HASL(leadfree),Immersionsilver/tin,Goldfingerplating,ENIG+goldfingerplating,ImmersionSilver+goldfingerplatingProductiontypeHighprecisionmulti-layerboard,Blindholeboard,Buyerdholeboard,Highfrequencyboard,AluminiumbackedboardCertificateISO9001.ULetcWelcometo:http://www.fkxpcb.en.alibaba.com/http://www.fkxpcb.com