FR-2 Single Sided Board (SSB) 1L, FR-2, 1.5mm, 1OZ, Green solder mask, White silkscreen, ... Punching, OSP. E-test SERIALITEMTECHNICAL DATA1Layers1-16 Layers2Base-materalFR-2, CEM-1, FR-4, Metal base, Rogers...3Board ... 2mil (0.05mm)15HASL(HAL)40u"~1000u"16OSP(Entek)2-5um17Gold fingerNi: 80~250u", Au: 1~5u"18Immersion ... ENIG)Ni: 80~200u", Au: 1~8u"19Warp and twist≤0.75%20Outline Tolerance±6mil (0.15mm) ...