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File Naming Conventions

Gerber Foil Layers *.TOP = Top or Component Side
*.BOT = Bottom or Solder Side
Gerber Mask Layers *.TSS = Component Legend
*.TSM = Solder Mask
Legend and Mask Layers can be unique for top and bottom causing an alteration to the file suffix.
Aperature File sample *.LST (is the most common)
RS274-X sample Gerber should be generated in 2.4 format
NC or Excellon Drills *.DRL = Drill file
*.LST = Tool Report - Sizes are also in NC file header
NC Drill file sample 2.4 Trailing Zeros

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