... ISO,UL,TS16949 dertificate OSP PCB1) single-sided PCB with Lead-free HALS finished2) 1OZ copper finished3) ... UL certificate, RoHS compliant)2. 1-12 layers PCB board. and 1-8 layers mass prodcution.3. ... Technology CO.,LTD(LLT-PCB) which established in 2002, is a high-tech enterprise ,specialized in high-precision Double- ... of more than 12,000 square meters, LLT-PCB is able to produce 30,000 square meters ...