ESD in integrated circuits

Abstract
A review of the effects of electrostatic discharge (ESD) on semiconductor integrated circuits is presented. The principles of the human body model (HBM), the machine model (MM) and the charged device model (CDM) test methods are outlined, and their relative merits and drawbacks are discussed. Techniques, such as the transmission line pulse method, which may be used to characterise ESD protection circuit elements are also presented. The concept of ESD protection circuit designs and some typical ESD protection circuit elements are presented. The main design and process parameters are identified, and the main categories of damage under ESD conditions are shown. Models of the behaviour of the protection circuit elements under high current conditions are presented, and the boundary conditions for damage are discussed. The issues that will influence ESD protection circuit behaviour in the future are discussed.

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