Mechanism of Sequential Finger Triggering of Multi-Finger Floating-Base SCRs due to Inherent Substrate Currents

Hasan Karaca,Clément Fleury,Steffen Holland,Hans-Martin Ritter,Guido Notermans,Dionyz Pogany

2019 41st Annual EOS/ESD Symposium (EOS/ESD)（2019）

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摘要

Successive voltage drops near the holding voltage associated with sequential finger triggering (SFT) are observed in multi-finger floating-base SCRs. A time delay between the triggering of neighboring fingers is in the 3–150ns range and it is observed only for long pulse rise times (10ns). TCAD simulation explains that SFT is due to lateral carrier diffusion-limited processes.

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关键词

multifinger floating-base SCRs,long pulse rise times,sequential finger triggering,successive voltage drops,holding voltage,inherent substrate currents,lateral carrier diffusion-limited processes,time 3.0 ns to 150.0 ns,time 10.0 ns

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