![Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly. Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly.](https://i1.wp.com/www.wellpcb.com/sites/default/files/solder%20mask%2011.jpg)
Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly.
![Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly. Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly.](https://i1.wp.com/www.streamlinedpcbdesigns.com/wp-content/uploads/2019/12/Paste_Mask_Expamsion_of_Pad.png)
Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly.
![Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly. Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly.](https://i1.wp.com/www.altium.com/documentation/sites/default/files/wiki_attachments/248561/DefaultDesignRule_Mask_SolderMaskExpansion_AD.png)
Solder Mask Expansion - Secrets For Mastering The Art Of Choosing The Right Solder M Backup Board And Aluminium Entry Sheet For Pcb Drill - In practice, things never align perfectly.
![From Idea to Manufacture - Driving a PCB Design through PCBWorks | Online Documentation for Altium Products From Idea to Manufacture - Driving a PCB Design through PCBWorks | Online Documentation for Altium Products](http://documentation.pcbworks.com/sites/default/files/wiki_attachments/242156/SolderMaskExpansion.gif)