I cant understand what this DRC error means.

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Especially I do not understand this box. Does it mean that the Soldermask will cover part of the pad? How to correct it?


1 Answer 1


It's due to the fact that your reference designator font is "proportional", not "vector".

Proportional fonts in eagle are collision detected with a rectangular box which is what the DRC is erroring about - the bounding box of the ref-des intersects the stop mask.

Vector font converts to a series of lines so collision detects the actual lines rather than the bounding box.

I'd recommend always using vector font. In fact there is a setting in the layout editor options for converting all fonts to vector.

  • \$\begingroup\$ Great answer. Thank you. I would never guess myself. \$\endgroup\$ Sep 7, 2019 at 19:07
  • \$\begingroup\$ @P__J__ confused me for a while when I first started using Eagle too. \$\endgroup\$ Sep 7, 2019 at 19:14

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