Hello,
I sent my PCB file to two different companies and they produced my PCB boards. But after getting them back, I see some additional lines which are not covered by the solder mask. I checked my PCB file and I didn't see anything on other masks. what is my mistake?



I sent my PCB file to two different companies and they produced my PCB boards. But after getting them back, I see some additional lines which are not covered by the solder mask. I checked my PCB file and I didn't see anything on other masks. what is my mistake?
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