Physics-based Compact Model of N-Well ESD Diodes

This work presents a compact model for N-Well ESD diodes, including the parasitic PNP. A schematic representation of the model is similar to the SPICE Gummel-Poon model, but the implementation differs. The proposed model uses a non-quasi-static description of the stored charge, which facilitates accurate simulation of the diode’s transient response to ESD. The very high-level injection which occurs during ESD is modeled in a manner suitable for the parasitic PNP with its relatively large base width.