4 layers Fr4 pcb board Minimum order quantity: 5piece Supply Ability: 30000 Square Meters per Month UL, ISO9001,ISO14000 ,ROH SpecificationsDetails Layer counting2-20 layersProcess the area the most largely550*1000mmMinimum board thickness4layers 0.40mm6layers 0.80mm8layers 1.0mm10layers 1.2mmMinimum line space0.10mmHole and wall copper thickness0.025mmMetallization aperture public errand± 0. ...