The commonly accepted file format for printed circuit board designs is the Extended Gerber RS-274X with drilling files in Excellon format.
Most of PCB manufacturers also accept the following file formats:
- Gerber RS-274X2
- Eagle BRD (up to 4 layers)
- Mania-Barco DPF
- GraphiCode GWK
- Gerber RS-274D + separate file(s) with apertures.