... Certificate: UL, ROHS, T/S16949 3.Short lead time 4.good Price pcb manufacturer china: ·Blind and Buried via ... mask PCB ·PCB Bwith Bridge Connecting ·RoHS MaterialFR-4 / Hi Tg FR-4 / Lead free Materials (RoHS Compliant) /CEM-3 ... ) Min Space Width (b)0.1mm (4 mil)Min Annular Ring0.1mm (4 mil) SMD Pitch (a)0.2 mm ... Clearance (b)0.1mm (4 mil)Min SMT Pad spacing (c)0.1mm (4 mil)Solder Mask Thickness0.0007"( ...