... years Experience in PCB Field-IPC-600 Class II and III Workmanship Standard-UL,TS16949,ISO9001,Rohs Certificated - ... space: 3.5mil/3.5mil7) Surface finishing/treatment: HASL/Lead free HASL, Immersion Gold, Gold plating,Immersion silver, immersion Tin, OSP ... Quality ensure: UL approval, TS16949:200214) Special requirements: Buried and Blind vias, impedance control, via plug, BGA soldering, Gold ...