# \#solder-mask-expansio **URL:** https://sierraconnect.protoexpress.com/tag/solder-mask-expansio/262.md [Latest](https://sierraconnect.protoexpress.com/latest.md) · [Categories](https://sierraconnect.protoexpress.com/categories.md) · [Tags](https://sierraconnect.protoexpress.com/tags.md) --- ## [PCB Solder Mask Clearance Every Engineer Should Know](https://sierraconnect.protoexpress.com/t/pcb-solder-mask-clearance-every-engineer-should-know/3704)
**Author:** [@Mohamed\_Faheemuddin](https://sierraconnect.protoexpress.com/u/Mohamed_Faheemuddin)\ **Replies:** 0\ **Last updated:** [November 18, 2025, 2:04pm UTC](https://sierraconnect.protoexpress.com/t/pcb-solder-mask-clearance-every-engineer-should-know/3704 "2025-11-18T14:04:54Z")
Originally published at: https://www.protoexpress.com/blog/pcb-solder-mask-clearance-every-engineer-should-know/ PCB solder mask clearance is the space between a copper pad and the surrounding solder resist. It typic…