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Title:Investigation of system-level ESD-induced failures
Author(s):Vora, Sandeep Gautam
Director of Research:Rosenbaum, Elyse
Doctoral Committee Chair(s):Rosenbaum, Elyse
Doctoral Committee Member(s):Hanumolu, Pavan; Zhou, Jin; Schutt-Ainé, José
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Electrostatic Discharge
EM simulation
Abstract:Electrostatic discharge (ESD) is a phenomenon that can adversely impact the operation of systems. ESD is a short duration, high current stress which can cause the permanent failure of a system or temporary glitches in a system. Soft failures include any recoverable system malfunction, from resets to loss of stored data. They can be caused by noise entering signal pins or by supply voltage fluctuations. Soft failures have previously been studied by using test structures to identify failure mechanisms or actual products to identify the types of soft failures that occur. These models are either simplified or offer little to no insight into the cause of the soft failures. The first part of this dissertation addresses soft failures within a fully functional semi-custom microcontroller. This allows for both an understanding into the exact causes of soft failures as well as testing for effects of soft failures from ESD on operating software. The second part of this work focuses on latch-up in reverse body biased core circuitry. Latch-up is a phenomenon where parasitic devices within a CMOS structure turn on and stay on, shunting current from power to ground, often causing permanent failure. Latch-up has often been looked at from a substrate current injection point of view, however, measurement of a reverse body biased chip shows that latch-up can occur due to supply bounce. An analytic model and SPICE simulation verify the phenomenon, and with the help of simulation, methods of increasing robustness are discussed.
Issue Date:2020-09-04
Rights Information:Copyright 2020 Sandeep Vora
Date Available in IDEALS:2021-03-05
Date Deposited:2020-12

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