... 3.UL,RoHS,SGS, ISO9001:2000 4.Approved HASL PCB; PCB Boards Capability Material: FR4, High TG FR4,Halogen ... across blind/buried vias, characteristic impedance control, Rigid-flex board etc. Reliability Test: flying probe test/fixture test, impedance ... test, hole resistance test, and micor metallographic section analysis, etc. Wrap and twist: ≤0.7% Flammability: 94V-0 Phone PCB Circuit Board Blank PCB