You can get around this by creating a ‘Bottom Silkscreen‘ plot when you make the gerbers. If you want to test the file, companies like have an online Gerber checker – but this can be fiddly as they usually look for bottom silkscreen even if you don‘t have any print on the underside. zip file whatever you want, ideally the board name. Drill data – Through Hole.drl Drill data – Through Hole.Bottom Solder Mask.gbr Bottom Solder Mask.Now, the file extensions for these files need to be changed to make them board house friendly. DesignSpark PCB DesignSpark PCB is a free PCB software option thats best suited for. A text file log will appear, just close that and head to the folder that you selected the files to be saved in – you should have a file for each plot we just made. Even though the software is free to download, donations are accepted. Click ‘Run‘ and give it a minute to export the Gerber files. Also set the output path whilst you‘re here, to tell the application where to save your gerber files. Click ‘Options‘ (bottom right) and un-tick ‘Include design name in plot file name‘.
Un-tick ‘Separate files for plated and unplated holes‘ if already ticked.
Click ‘Add Plot‘ and select ‘Gerber‘ on the pop-up box.Delete ‘Top Copper (Paste)‘, ‘Bottom Copper (Paste)‘ and ‘Drill Ident Data – Through Hole‘ (click to select, then click ‘Delete Plot‘ on each).
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