Here is the list of technical specification of PCB we manufacture at Printwell.

 Specifications  Standard  Prototype
 Minimum conductor width  5 mils( 0.127 mm)  5 mils( 0.127 mm)
 Minimum conductor Spacing  5 mils( 0.127 mm)  5 mils( 0.127 mm)
 Mimimum Plated hole size  10 mils( 0.254mm  10 mils( 0.254mm)
 Maximum board size  850 mm x 400 mm  850 mmx 400 mm
 Maximum number of layers  6  12
 Maximum outer layer copper thickness  4Oz( 140 microns)  4Oz( 140 microrns)
 maximum inner layer copper thickness  2Oz(70 MICRONS)  2Oz( 70 microrns)
 Board Thickness tolerence  10%
 SMD testing  20 mils( 0.5 mm)  12 Mils ( 0.3 mm)
 Aspect Ratio  1:8
 Drill tolerences  
 0.5-2.5 mm  (+/-) 0.05  mm
 > 2.5 mm  (+/-) 0.10mm
 Size Tolerence
 <150 mm  (+/- )  0.10mm
 >150 mm  (+/_)0.20mm
 Other tolerences
 PCB thickness  (+/-) 10%
 track width and spacing  (+/-) 10%
 Minimum PTH thickness  > 20 microns
 Product finish.
 Single side  HAL, Lead Free HAL, ENIG, Lacquer
 Double Sided  HAL, Lead Free HAL,  ENIG, TIN, Electroplated Gold &  Nickel
 Solder Mask Finish  PISM, Liquid Solder  Mask
 Solder Mask colour  Green, White, Black,  Blue ,Red
 Ident colour  White, Black,  yellow,Green
 Product Raw Material
 Single Side  FR4, CEM1,  PP
 Double Side  FR4,