Analysis of charge/discharge processes for the basic ESD models

The human body model (HBM), charged device model and field induced model have been developed to simulate the electrostatic discharge (ESD) event. The author develops system equations to characterize these basic ESD models. The charge/discharge processes for the models are analyzed, using Maxwell´s technique and a sphere model. Body potentials, energies and the charge transfer during a discharge are calculated as a function of the charge on the source conductor and the capacitance coefficients for the conductors used. Approximate solutions for the HBM are proposed. Measurements made with a system of conductors and a ground plane are used to determine the accuracy of these solutions