文档介绍：Analyse of Protection Devices' Speed Performance
against ESD under CDM Using TCAD
Qiang Cui, Yan Han, Juin J. Liou, Senior Member, IEEE, and Shurong Dong
frequently during the simulation with existing TCAD
Abstract-Speed performance plays a critical role in methods. [3] 3) Even if the convergent problem can be
protection devices against ESD (Electro-Static avoided fortunately, the I-V characteristic obtained in the
Discharge) overstress under CDM (Charged Device existing methods can't evaluate the speed performance.
Model). It is too demanding to obtain speed This is because speed evaluation can only by measured by
performance of protection devices under CDM transient simulation methods rather than DC simulation. [4]
accurately by testing. Therefore we have to resort to The problems mentioned above make it stubborn to
TCAD (puter Aided Design) method evaluate ESD protection devices through simulations, and
to evaluate speed performance under CDM. This therefore raise the blindness and risk ofthe design. Against
TCAD methodology is based on mix-mode transient this problem, a novel TCAD methodology to evaluate
circuit simulation, which depicts ESD events better. speed performance of ESD protection device will be
Two time constants, Ttrigger and Trecover, and two key presented in this paper. We are going to take SCR (Fig. la)
coefficients, Ftrigger and Crecoverg