Calibre PERC LDL for ESD/TVS Reliability Verification
1. ESD Discharge Path Validation
Topology-based verification of actual discharge paths beyond pure geometry checks.
- IO → Clamp → GND path completeness validation
- Cross-domain discharge path analysis
- Detection of floating clamps or missing protection
- Pre-identification of potential current density hotspots
2. P2P Resistance-Based ESD Robustness Analysis
Identifies resistance imbalance leading to non-uniform snapback turn-on and insufficient ballasting.
- Bulk resistance mismatch → latch-up risk detection
- High discharge path resistance → clamping degradation prediction
- Finger resistance imbalance → current crowding risk
- Support for ballasting validation in TVS design
3. Cross-Domain Latch-Up Risk Verification
Simultaneous well spacing and resistance checks to prevent latch-up-prone structures.
- Combined spacing + resistance criteria
- Domain-crossing net risk identification
- Power domain isolation validation
4. Voltage-Dependent Spacing Checks
Dynamic spacing verification based on pin voltage information.
- High-voltage TVS clamp environment validation
- Voltage-difference-based metal spacing rules
- ESD pulse scenario-driven layout validation
5. Source-Based Simulation Alignment
Ensures that protection network intent in simulation matches physical implementation.
- Clamp topology intent verification
- Automated simulation net to layout mapping
- Protection network completeness validation
Strategic Positioning for TVS Roles
- LDL does not directly simulate snapback physics, but eliminates structural causes such as resistance imbalance and incomplete discharge paths.
- Strengthens ESD robustness structurally before physical testing.
- Adds topology-aware sign-off layer to TVS development flow.
- Enables automation of ESD/TVS reliability verification at design stage.
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