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everyone. I have a problem with one of my designed boards. I submitted my order to PCBWay for checking my files before ordering and I was informed that there is no bottom Soldermask layer. This confused me since I have not encountered any layer named as such in the EAGLE layers list. Maybe this is a layer that exists in that list? I have browsed online and found that the areas on tStop and bStop are where the solder mask is not applied. Since I do not have any components or pads in the bottom only a few traces as I used vias, how do I enable or incorporate this layer into my design?

Some of the suggestions that PCBWay was kind enough to give are:

  1. Cover with the solder mask ink all
  2. Do solder mask opening all
  3. Or you can add the layer and resubmit the file.

I am not sure how to do this task related to the solder mask. If you have anything to share a link to a tutorial or video (I tried finding to no avail), please do share. I thank you for taking your time to read, looking forward to learning from everyone.

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They mean bStop. The layer is missing because it is empty: no pads on the bottom layer means no openings in the soldermask.

The answer is (1): you want the whole bottom side covered in soldermask.

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  • \$\begingroup\$ Thank you. I have discussed the same thing and they've confirmed that the bottom side will be completely covered in soldermask. \$\endgroup\$ Apr 10 at 12:58

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