Design of Dual-Direction SCR With High Holding Voltage for High Voltage ESD Protection

An improved dual-direction silicon-controlled rectifier (IDDSCR) for high-voltage electrostatic discharge (ESD) protection applications has been proposed and verified in a
$0.18\ \mu m$
standard BCD process. Measured TLP results illustrated that the proposed IDDSCR has a high holding voltage of 29.81V and has good latch-up immunity.