An improved model of man for ESD applications

Abstract

Abstruct -Human-generated ESD current waveshapes are predicted under contact discharge and arc discharge conditions. The uncertainties connected to man's posture and proximity to the victim are carellly examined. The adopted human body model is devised to be composed by 11 elemental blocks and treated by the diakoptic method in analogy with network theory. The set of given leakage capacitances, in conjunction with the resistances and inductances as serial parameters, forms a complex RLC network. The assembly includes the grounded or ungrounded victim and image elements due to the presence of the plane and a nearby vertical wall. A PSPICE sqftware allows the discharge scenario to be evaluated. New insight into the complex charge transfer is thus gained, which have been combined with arc derived performances. This carell analytical interpretation of the ESD phenomenon could contribute to in-progress standardization.

Human Identification from Walking Signal based on Measurement of Current Generated by Electrostatic Induction

“…The human body is electrically charged during walking [26][27][28][29][30]. In the case of a subject standing or walking, we assume that there are two highly resistive layers between the feet of the subject and the floor, as shown in Figure 1.…”

Electromagnetism of a Semi-Infinite Filament. A Brief Resume

“…Therefore, the orientation of each filament is dictated by the conical cavity while the opposite end of the filament itself is envisaged being connected to a common zero-potential reference placed at infinity. Consider that each monopole can be considered as being in isolation since the capacitance of the loaded monopole takes into account the electrostatic influence of the surrounding spheres, image included (see [15] and [16] for details). The current impressed to the monopole represents the elemental discharge of one of the blocks in which a discharging human body is ideally partitioned during an ESD event.…”

Electrostatic Discharge Current Linear Approach and Circuit Design Method

“…To determine z i 's, the coefficients of ψ(z) are determined from (9) if N is replaced by n. Having obtained the roots of ψ(z), A i 's are determined from (10) if N is replaced by n.…”

“…A modified ESD generator with a reference waveform very close to the one defined by the IEC Standard [6], as well as an equation for the reference waveform, have been proposed in [8]. In another work [9], the adopted human body model (HBM) is divided into 11 elemental blocks and is treated by the diakoptic method in analogy with network theory, using PSpice software. A recent publication [10] clarifies the parameters that govern the discharge current waveforms of ESD generators, proposing an equivalent circuit model based on the structure and dimensions of the ESD generator.…”

“…There have been various publications which propose improved circuits for ESD generators [8][9][10][11]. A modified ESD generator with a reference waveform very close to the one defined by the IEC Standard [6], as well as an equation for the reference waveform, have been proposed in [8].…”