Calibre PERC LDL as a Structural Reliability Firewall for TVS & ESD Design
System Architecture Overview
Project Context
In advanced SoC designs, ESD robustness depends not only on spacing
and connectivity but also on resistance balance, discharge topology,
and voltage-aware structural integrity.
Traditional sign-off validates correctness.
LDL validates robustness before silicon stress testing.
Architectural Layers Explained
1. Geometry Layer (DRC)
Spacing and enclosure rules
Polygon integrity checks
No topology awareness
2. Connectivity Layer (LVS)
Netlist-to-layout matching
Pin mapping validation
No resistance qualification
3. LDL Topology Layer
IO → Clamp → GND path completeness
Point-to-point resistance imbalance detection
Cross-domain latch-up prevention
Voltage-dependent spacing rules
Source-based schematic alignment
4. Structural Reliability Sign-off
LDL functions as a structural firewall between layout completion
and silicon ESD qualification.
Concrete Impact
Prevention of current crowding in TVS fingers
Detection of floating clamps
Elimination of latch-up-prone structures
Reduced ESD failure iteration cycles
Strategic Positioning
LDL transforms ESD verification from reactive failure analysis
to proactive structural robustness engineering.
For high-voltage TVS and advanced nodes,
topology-driven verification is a competitive reliability enabler.