Annular Ring Calculator
Calculate via and pad annular ring width
Input Parameters
Drill
Pad
Ring
Results
IPC Class 2: PASS
Minimum required: 0.050 mm (2.0 mil)
Nominal Annular Ring
0.200 mm
7.9 mil
Worst Case Ring
0.100 mm
3.9 mil
IPC Requirements
Class 1 (General)
Min: 0.05 mm (2 mil)
Class 2 (Dedicated)
Min: 0.05 mm (2 mil)
Class 3 (High Rel)
Min: 0.05 mm (2 mil)
Per IPC-6012 standard
Best Practices
- Design for worst-case tolerances
- Add margin for manufacturing variation
- Consider pad size early in design