... HASL,HASL lead-free,HAL,Flash gold,immersion gold,OSP,Gold Finger Palting,Selective thick gold plating, immersion silver,immersion tin, Carbon ... and blind vias, impedance control, thick Cu PCB,selectivity plating gold 30 microinch18). Profiling: Punching, Routing, V-CUT, Beveling19 ... have a sound quality management system,Ensure the quality of all productsLow cost (100USD) Prototype PCB:Qty: 10pcsBoard ...