... (0.050mm) NPTH hole tolerance ±0.002” (0.050mm) Plating Min. hole size 0.0008” (0.02mm) Aspect ratio 20 ... (5:1) Solder Mask Color green,light green,white,black,dark brown,yellow,red,blue ... 0.0005”-0.0007”(0.012mm-0.017mm) Silkscreen Color White,black,yellow,red,blue,green Min. Size 0. ... immersion tin,O.S.P (Entek),S/G plating,ENEPIG,G/F plating,carbon… Gold Finger angle 15° 30° 45° ...