... ,FR-1,FR-2,Aluminum3Board thickness0.2mm-7mm4Max.finished board side500mm*500mm5Min.drilled hole size0.25mm6Min.line width0.075mm ... spaceing0.075mm(3mil)8Surface finish/treatmentHALS/HALS lead free,Chemical tin,Chemical Gold,Immersion gold Inmersion Silver/Gold,Osp,Gold ... CUT,Beveling16Assembly ServiceProviding OEM service to all sorts of printed circuit board assembly LED Board with SMD LED