... preferred274-X,274-D,DPF,ODB++Drill fileX & Y coordinates, with tool sizes includedSizeMax. finished dimensions580mm x 800mm – Single/ Double-sided550mm ... space from drilling to inner pattern0.1mmMin. space from annular ring to inner pattern0.1mmLayer-to-layer registration±0.003”(0 ... (0.004”)Semi-holeYSurface FinishHASL,HASL pb free,immersion gold,immersion silver,immersion tin,O.S.P (Entek),S/G plating ...