SMD Neck-Down

Rule category: SMT

Rule classification: Unary


This rule specifies the maximum ratio of the track width to the SMD pad width, expressed as a percentage.


Default constraints for the SMD Neck-Down rule.

  • Neck-Down – the percentage value for the maximum permissible ratio of track width to SMD pad width. Entering a larger value will allow for the use of greater width track.

How Duplicate Rule Contentions are Resolved

All rules are resolved by the priority setting. The system goes through the rules from highest to lowest priority and picks the first one whose scope expression matches the object(s) being checked.

Rule Application

Online DRC and Batch DRC.


You are reporting an issue with the following selected text and/or image within the active document: