... PCB in higher quality, more competitive price, quicker delivery and better logistic service…Welcome to send us RFQ! This form ... 105um),+/-8um(tolerance),purity 99.5%Impedance Control±10%Bow and Twist MAX.0.75%(SMT)Anti-strip 0.88N/ ... Finish HALtin height≤0.05mmENIGNickel 3-7um,gold:0.5-0.7umOSP/flash gold 0.2-0.5umPealable maskcover all on ... ,UL, Welcome to visit WALBOND ! 4L PCB with BGA and gold finger