Tip Top Printed Circuits Ltd is the PCB manufacturer located in South China. We can provide the high quality PCB basing on competitive price and good delivery period. The specification of the called Immersion GoldPCB *Mobile phone PCB *Line Width/space: 4mil/4mil *Smallest holes size: 0. 3mm(drill bit) * 100% Electrical Test, *ISO-9002, QS-9000 and TS/ISO-16949 approved.