... 3.5mil7) Surface finishing/treatment: HASL/Lead free HASL, Immersion Gold, Gold plating, Immersion silver, immersion Tin, OSP.8) Copper thickness ... Buried and Blind vias, impedance control, via plug, BGA soldering, Gold finger.15) Profiling: punching, Routing, V-cut, Beveling.16 ... ) Provides OEM services to all sorts of printed circuit board assembly as well as Electronic encased products ...