![footprint - How does Altium designer decide the size of the solder mask? - Electrical Engineering Stack Exchange footprint - How does Altium designer decide the size of the solder mask? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Sl2GBl.png)
footprint - How does Altium designer decide the size of the solder mask? - Electrical Engineering Stack Exchange
![Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 17.1 User Manual | Documentation Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 17.1 User Manual | Documentation](https://www.altium.com/documentation/sites/default/files/wiki_attachments/263971/DefaultDesignRule_Mask_SolderMaskExpansion_16_0_AD.png)
Working with the Solder Mask Expansion Design Rule on a PCB in Altium Designer | Altium Designer 17.1 User Manual | Documentation
![Schematic diagrams of top and side view of solder on Cu substrate, (a)... | Download Scientific Diagram Schematic diagrams of top and side view of solder on Cu substrate, (a)... | Download Scientific Diagram](https://www.researchgate.net/publication/360532352/figure/fig6/AS:1156229795721218@1652678073944/Schematic-diagrams-of-top-and-side-view-of-solder-on-Cu-substrate-a-and-c-before.png)
Schematic diagrams of top and side view of solder on Cu substrate, (a)... | Download Scientific Diagram
![Solder Mask Expansion Enhancements (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation Solder Mask Expansion Enhancements (New Feature Summary) | Altium Designer 15.1 User Manual | Documentation](https://www.altium.com/documentation/sites/default/files/wiki_attachments/263476/PCB-Dlg_Rules-SolderExpansion2.png)