Robust Protection Device for Electrostatic Discharge/Electromagnetic Interference in Industrial Interface Applications

摘要

A new silicon-controlled rectifier (SCR) fabricated in a 30-V mixed-signal CDMOS (CMOS/DMOS) technology is presented. This device allows for robust electromagnetic interference (EMI) and electrostatic discharge (ESD) voltage clamp for high-speed industrial interface applications operating in variable voltage swing range (e.g., from -7 to + 12 V). The device robustness is demonstrated under different pulsewidths, stress, and temperature. Analysis of the device physics is complemented via mixed-mode numerical simulations. The 200 x 200 mu m(2) device designed in an annular configuration achieves > +/- 8 kV IEC robustness and low clamping voltage at +/- 20 A.