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Overview of on-chip electrostatic discharge protection design with SCR-based devices in CMOS integrated circuits

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2 Author(s)
Ming-Dou Ker ; Nanoelectronics & Gigascale Syst. Lab., Nat. Chiao-Tung Univ., Hsinchu, Taiwan ; K. -C. Hsu

An overview on the electrostatic discharge (ESD) protection circuits by using the silicon controlled rectifier (SCR)-based devices in CMOS ICs is presented. The history and evolution of SCR device used for on-chip ESD protection is introduced. Moreover, two practical problems (higher switching voltage and transient-induced latchup issue) limiting the use of SCR-based devices in on-chip ESD protection are reported. Some modified device structures and trigger-assist circuit techniques to reduce the switching voltage of SCR-based devices are discussed. The solutions to overcome latchup issue in the SCR-based devices are also discussed to safely apply the SCR-based devices for on-chip ESD protection in CMOS IC products.

Published in:

IEEE Transactions on Device and Materials Reliability  (Volume:5 ,  Issue: 2 )