Altium Designer 文档
Retired Documentation No Longer Applicable to a Later Version of Altium Designer
Retired Documentation - Design Rules
Working with the Vias Under SMD Design Rule on a PCB in Altium Designer
Created: 三月 23, 2017 | Updated: 九月 27, 2019
| Applies to versions: 18.0, 18.1, 19.0, 19.1, 20.0, 20.1 and 20.2
您正在阅读的是 20. 版本。关于最新版本，请前往 Working with the Vias Under SMD Design Rule on a PCB in Altium Designer 阅读 21 版本
Rule category: High Speed
Rule classification: Unary
Summary
This rule specifies whether vias can be placed under SMD pads.
Constraints
Default constraints for the Vias Under SMD rule.
- Allow Vias under SMD Pads - specifies whether vias can be placed under the pads of surface mount components.
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, Batch DRC, interactive routing, and autorouting.