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I need top create a footprint with only one top layer pad (no bottom pad).

To create a through hole pad and remove the solder mask on the bottom side will not work, because the hole needs to be none-plated.

With Eagle 9.6.2 I tried with polygons but I can't control the isolation gap around the polygon or the hole.

Any ideas?

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  • \$\begingroup\$ are you referring to a SMT pad ? \$\endgroup\$
    – Rahmany
    Commented Oct 28, 2022 at 13:03
  • \$\begingroup\$ Please show a picture or screenshot of the pad you created using a polygon. \$\endgroup\$
    – Andy aka
    Commented Oct 28, 2022 at 14:39

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Just use an SMT pad on the top (roundness set to 100%), and a drill hole in the centre. Because there is then no pad on the bottom side the hole will end up basically a non-PTH.

Eagle will give a DRC error due to the drill being in the pad, but you can safely ignore the error as it is intentional.

I use the same approach for solder standoffs whereby a large pad is needed on one side, and an unplated hole in the middle. Had no issue with PCB fabs understanding what I needed.

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