From System Zap to Silicon Improvement: Advanced Fault Isolation of USB2 Electrostatic Discharge Failures

This case study traces the full fault isolation and failure analysis workflow applied to a USB2 interface failure in an Intel H310 platform controller hub following a system-level −2 kV electrostatic discharge event. Beginning with a critical methodological distinction between electrical overstress and ESD — and the different isolation strategies each demands — the article walks through a five-phase workflow: IV curve parametric characterization to confirm resistive shorts on the D+ and D− data lines, confocal scanning acoustic microscopy to rule out gross package damage, lock-in thermography for coarse spatial localization, thermally induced voltage alteration (TIVA) laser probing for transistor-level precision, and CAD overlay correlation to pinpoint the damage site. The findings demonstrate how rigorous hierarchical fault isolation translates a system-level failure into actionable silicon improvement.