... pcb assembly manufacturers, Rigao Electronics is a professional hasl lead free for led pcba and led pcb assembly supplier and factory, ... -30 layer2MaterialFR-4,CEM-3,Hight TG,FR4 Halogen Free,FR-2,Aluminum3Board thickness0.2mm-7mm4Max.finished board side500mm* ... 7Min. line spaceing0.075mm(3mil)8Surface finish/treatmentHASL/HASL pb free, Immersion gold, Immersion Sliver, Immersion tine,OSP(Entek),S ...