We(Topscom Electronics) are a china bigger anufacturer of components and circuit boards. now we have the high employees over 2300 in china, circiut boards include: flexible circuit boards(FPC), rigid circuit boards(Rigid PCB). and also provide the PCBA Or EMS service for our clients. our products exports to all the world, our products have received many certification, for example: TUV(ISO9000: 14000), UL, CE, VDE, 3C, Nemko etc. especially our price is so competitive and our quality is guarantee, and the lead time is timely. you are always my god-my friend, and really welcome to visit our factory any time! FPC Products parameter: layers: 1--- 6 Flexible Printed Circuit Board Panel size: max-250*400 -12288; Drilling diameter size: max diameter -6. 5mm min diameter-0. 25mm Base material cupper thickness: max-0. 070mm min-0. 012mm Insulate layer thickness: max-0. 05mm(PI thickness) min-0. 0125mm(PI thickness) Electronic plating Sn/Pb thickness: 3um --- 20um -12288; Electronic plating Au thickness: above0. 05um -12288; Chemical immersion Ni/Au thickness: 0. 05um --- 0. 1um -12288; Electronic plating Sn thickness: 3um --- 20um -12288; Etching width&space: S: 3mil (0. 076mm) D F M: 4mil (0. 100mm) the same mould.