A Method for In Situ Characterization of Human-Induced ESD

Abstract

The probability of electronic products being affected by electrostatic discharge (ESD) depends on the probability of the device being subjected to ESD and the voltage level. By determining this statistical probability, product risk assessment, and the selection of appropriate ESD test levels can be performed to ensure the targeted field reliability is reached. Obtaining the necessary statistical information about ESD requires methods that can detect and quantify its parameters. Traditional ESD detection methods are predominantly stationary, requiring reference potential, and lack adaptability for portable devices and wearables. This article demonstrates a novel, portable in situ detection method based on on-body electric and magnetic field measurements. The proposed method integrates a wearable ESD sensor, capable of detecting discharge events, estimating voltage and current levels, and differentiating between human skin and human metal discharges. This sensor's design allows the characterization of the complex ESD environments of a person, offering a significant improvement over existing methods. Additionally, integration with a mobile application enables detailed analysis of the discharge scenario through user questionnaires for the first time.