... , low cost&fast delivery. Welcome To Rigao ElectronicsShenzhen hasl lead free double-sided FR4 pcb board - Contract Manufacturing- Engineering Services- ... Copper Weight Outer Cu weight 0.5oz ~ 3.0ozInner Cu wight 0.5oz ~ 3.0oz Laminate MaterialsFR-4,FR-1,,FR ... Arlon,Taconic,Isola,PTFE, Bergquist2). Surface Treatment: HASL,HASL lead-free,HAL,Flash gold,immersion gold,OSP,Gold Finger Palting,Selective ...