*.cmp  = Component side
*.ly2  = 1 Innenlage (unter Component side)
*.ly3  = 2 Innenlage (zwischen LY2 und solder side)
*.sol  = solder side
*.stc  = Solder stop mask component side
*.sts  = Solder stop mask solder side
*.drd  = drill data
*.drl  = drill tool data
*.prt  = Component print