Ultra-low-leakage power-rail ESD clamp circuit in nanoscale low-voltage CMOS process

A new power-rail ESD clamp circuit with ultra-low-leakage design is presented and verified in a 65-nm CMOS process with a leakage current of only 116 nA at 25degC, which is much smaller than that (613 muA) of traditional design. Moreover, it can achieve ESD robustness of over 8 kV in HBM and 800 V in MM ESD tests, respectively.