... )Surface Finishing:HASL/lead-free HASL,immersion gold/silver/tin,chemical gold,plated gold,OSP,carbon ink,gold finger10)Hole Plating Tolerance PTH Thickness ... Abrasion:>5H 20)Inflammability:94vo21)Certificate:ISO9002,UL,SGS22)Special Technology:blind and buried vias,impedance control,BGA,semiconductor vias,silver ...