A single sided flexible circuit construction with a polyimide cover film laminated to copper allowing access from one side only. Application of sigle sided flex circuits: Optical pick-up for a/v & computer ( or cdp & dvdp) Camera Capstan motor for camcoder & vcr Vibration motor for mobile phone Stepping motor. Parameter of flexible circuits: Board thickness:0.2-6.5mm Minimum conductor spacing/width:0.1/0.1mm 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) . Please contact us now for more information about flexible circuits & flexible printed circuits.