--- title: PCB updated: 2022-01-11 08:36:07Z created: 2022-01-08 13:18:07Z --- ==1mm=39.37mils== # JLC 丝印工艺 最小宽度6mil(0.2mm),最小高度1mm 50欧姆线宽,常规板厚10mil(0.254mm),20mil(0.508mm) # FR4 Er=4.4,板厚0.508mm,W=0.93mm;板厚1mm,W=1.87mm;板厚0.254mm,W=0.45mm; # RO4350 # RO4003 Er=3.55,板厚0.508mm,W=1.1mm; 7136 S1055 S1155