A novel design concept to turn on the SCR device by applying the substrate-triggered method is first proposed in the literature for effective on-chip ESD protection design. To avoid the transient-induced latch-up issue, the substrate-triggered SCR devices are stacked in the ESD protection circuits. The turn-on efficiency of SCR can be greatly improved by applying the substrate-triggered method. The on-chip ESD protection circuits designed with the substrate-triggered SCR devices for input pad, output pad, and power pad have been successfully verified in a 0.25-μm CMOS process. The substrate-triggered SCR device with a smaller layout area of only 40μm×20μm can sustain the HBM ESD stress of higher than 7kV.
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|State||Published - 1 Jan 2002|
|Event||2002 IEEE International Symposium on Circuits and Systems - Phoenix, AZ, United States|
Duration: 26 May 2002 → 29 May 2002