Gerber file requirement
The following layers are needed:
- Top layer: pcbname.GTL
- Bottom layer: pcbname.GBL
- Solder Stop Mask top: pcbname.GTS
- Solder Stop Mask Bottom: pcbname.GBS
- Silk Top: pcbname.GTO
- Silk Bottom: pcbname.GBO
- NC Drill: pcbname.TXT
Note: Board outline must be included at least in one layer. The Gerber file must be RS-274x format.