Solder Mask Expansion Settings with Altium

Hello there,

I’m currently working on a new PCB Layout, however when I uploaded it to Aisler every Pad which is connected to a Polygon is “bigger” / has less Soldermask around it:

I used the given Soldermask Rules from the Design Rules. Does anybody knows how to fix this?

The larger solder mask openings are a shortcoming of our soldermask opening adjustements as highlighted here: Soldermask Opening Adjustment

If you wish that we are processing your soldermask 1:1 as drawn, open up a feature reguest so the developers know that its a priotized feature. 👥 Feature Requests - AISLER Creative Community

Please also note that we do not check the soldermask layers in our PCB viewer, you thus have to ensure that your design complies with our design rules.

This part here looks like it violated the minimal soldermask width of 100µm. You can fix this by allowing solder mask on the annular rings of the via.

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