Overview
Definition
Routing is the process of creating physical copper connections between components according to schematic connectivity and design rules. Routing is not simply connecting two points — good routing must support signal integrity, power integrity, EMI/EMC performance, thermal performance, manufacturability, and reliability.
Objective
Create clean, efficient, manufacturable routing while meeting electrical and mechanical requirements.
Why it matters
Poor routing can cause signal reflections, EMI failures, crosstalk, voltage drop, ground noise, routing congestion, and prototype failures. Good routing significantly improves product performance.
Inputs
- Approved Placement
- Approved Stack-up
- Design Rules
- Net Classes
- Critical Net List
- Critical Component List
Outputs
- Completed Routing
- Power Routing
- High-Speed Routing
- Differential Pair Routing
- Clean PCB Connectivity
Common mistakes
- Routing randomly
- Ignoring return paths
- Excessive vias
- Long clock traces
- Poor differential pair routing
- Routing before placement stabilization
- Crossing split planes
Detailed Workflow
Detailed implementation workflow
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- Practical workflow
- Engineer checklist
- Standards
- Industry examples
- Engineer tips
- Common mistakes
Interactive Checklist
Trackable engineer checklist
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Standards
Industry standards reference
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Industry Examples
Industry-specific implementation
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- Automotive
- Industrial
- Medical
- Defense
- Aerospace
- Consumer
- Telecom
- ATE
Board Type Examples
Per board-type guidance
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- Rigid
- Flex
- Rigid-Flex
- RF
- High-Speed
- Metal Core
- HDI
Practical Design Considerations
Lessons learned from real projects
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- Lessons learned
- Real projects
- Case studies
- Design reviews
Tools & Resources
PCB Routing Tool
Altium Interactive Router
PCB Routing Tool
Allegro Route Editor
PCB Routing Tool
Xpedition Router
PCB Routing Tool
KiCad Router
Calculator
Saturn PCB Toolkit
Signal Integrity
Polar SI Tools
Signal Integrity
HyperLynx
Signal Integrity
SIwave
Step Tool
Routing Progress & Quality Tool
Routing Progress & Quality Tool
Track routing completion, return paths, and layer-change discipline.
Knowledge Check
Optional self assessment — no pass/fail, no mandatory completion.
1. Which should generally be routed first?
2. Why are return paths important?
3. What is a common differential pair requirement?
4. Why should via count be minimized on critical nets?
5. When should routing baseline be frozen?
Completion
Mark Step 7 as complete
Finish the checklist or self-assess, then mark complete.