... ,ROHS,ISO9000. We can manufacture PCB in higher quality, more competitive price, quicker delivery and better logistic service…Welcome to send us ... /±0.2mm Solder Mask Pad no Open soldermask must cover all on both side, reject tin on pad Pad Open reject ... % pass for the first time,+/-2%(tolerance) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! 4L PCB with BGA and gold finger ...