... lead time. 3. OEM pcba,SMT,DIP and final Assembly. High Standard SMT 4 layers PCBA manufacturingDetails for your check: Material: FR4 ... , High TG FR4, Halogen Free material, CEM-3, Rogers HF material, ... metallographic section analysis, etc.Wrap and twist: ≤0Flammability: 94V-0 High Standard SMT PCBA manufacturing