Novel diode-triggered SCR with suppressed multiple triggering for ESD applications

摘要

In this paper, the multiple triggering effect of the conventional DTSCR is explained minutely. To alleviate the multiple triggering effect, two novel diode-triggered SCRs with low trigger current (LTC-DTSCR) structures are proposed, which have lower trigger current by employing the branch current from parasitic SCR to assist the main SCR's conduction. TCAD simulations indicate that the proposed LTC-DTSCRs possess a lower trigger voltage as well as a lower trigger current, which can depress the multiple triggering effect efficiently.