... and Production 2.Over10 years in PCB field 3.Top quality with best price 4.ISO,UL, ... 40mil x 40mil) with PCB thickness FR-4 & CEM-3 1.2-3.00mm(47mil-120mil)Finished Board Size ... Position Tolerance+0.2mm(+8mil)Base Material Thickness0.2-3.5mmBase Material Copper Thickness18um, 35um, 70umElectrolytic ... of 20 to 48 micro inches05 to 1.2 micronOrganic solder ability PreservativesEntek Cu 106A HT, Prefulx ...