Decription about printed circuit board, 1.Product: printed circuit board 2.material: FR4 3.Layer:4 layer 4.solder mask: Green 6.Surface finish: HSAL Lead Free 7.Min. hole size: 0.2mm 8.Min. line width/space: 3 mil/3mil. Other information. 1.MOQ:1pcs 2.Certificate:ISO,UL,RoHS 3.100% E-testing. Reference our production capability for kartain pcb: 1) Layer:1-30layer 2) PCB board finished thickness:0.1mm-7.0mm 3) Material:FR-4,High TG,FR-4 Halogen Free,Rogers,Teflon 4) Min. Drilled hole size:3mil(0.075mm) 5) Min.Line width:3mil(0.075mm) 6) Min.Line spacing:3mil(0.075mm) 7) Surface finish:HASL/HASL lead free,HAL, Chemical tin,Chemical Gold,Immersion Silver/Gold,OSP,Gold plating 8) Copper thickness:0.5-7.0OZ 9) Solder mask color:green,yellow,black,white,red,blue 10)Inner packing:Vacuum packing/Plastic bag Outer packing:Standard carton packing 11)Shape tolerance:+-0.13 Hole tolerance:PTH +-0.075, NPTH +-0.05 12)Certificate:UL,ISO 9000,SGS,RoHS 13)Special requirements:Buried and blind vias + controlled impedance + BGA 14)Profiling:Punching,Routing,V-cut,Beveling 15)Provides OEM services to all sorts of printed circuit board(PCB) assembly as well as electronic encased products. Package: Inner package: Vaccum packing , plastic bag Outer package: standard carton packing.