Yes, the solder mask opening (the violet area) is in your case defined to be much larger by the pad. They’re large enough to collide with the opening of the adjacent pads.
The problem will be that you won’t have soldermask between the pads, which might not be much of a problem, but can make solder bridges between the pads more likely.
You can either ignore the error or reduce the solder mask opening size for these pads.
thanks a lot i hope it will get resolve
@Prashant_Andhale
What is the question?
I could guess, but I don’t like guessing. It’s your job to ask questions
I’ve read this argument many times, but never understood it. Solder does not adhere to a bare PCB, I do not understand what would be the difference between bare FR4 or solder mask. It does become very much different if copper from another net becomes exposed because of solder mask expansion. For example if narrow tracks were in between those pads. In such cases it is essential to have those tracks covered by solder mask.
Solder mask has a thickness, so it creates an additional barrier wall. Also the surfaces likely have a different surface tension with solder. I could be wrong, but solder mask feels more “hydrophobic” to liquid solder than raw PCB material.
Why you think that?
Let us assume that someone uses minimum clearance of 0.2mm and PCB without solder mask at all.
If he has pads with distance between them being 0.2mm the risk of bridging them by solder is bigger compared to situation when he has track going between pads with 0.2mm clearance from track to pads (pads of course have to have bigger distance between them to let track go there).
Risk is bigger as soldering paste is placed at both pads with 0.2mm distance between them and paste is placed only on pad if it is the track that is in 0.2mm distance from it.
So it is not as essential to cover track with solder mask as you think, I think.
@Jonathan_Haas @paulvdh @Prashant_Andhale @Piotr
I face the same issue with a component that I downloaded from EDA website.
Here’s the reason and solution (that I used).
Reason: As @Jonathan_Haas mentioned, the issue came from the fact that the adjacent pads overlaps.
Solution: Go to the editer of the component’s foot-print (=Edit Footprint). Then select each pad and open property editing window. When we see 2nd tab (=Clearance overrides and Settings), solder mask expansion would be not zero. So I set it to zero and solved the issue.
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