Performing statistical ESD tests using the new ANSI C63.1 6-1991 guide for ESD test methodologies

Mean Time Between Undesired Response (MTBUR) is a statistically based figure of merit that quantitatively defines how well a product will perform in a given operating environment. It represents a fundamental departure from the more traditional methods of interpreting ESD test results (e.g. IEC 801-2) where a fixed number of simulated discharges are used to determine compliance. This paper examines how the probabilistic aspects of ESD events, variations in product responses to ESD events, and statistical sampling methods are used in Method B of the new ANSI C63.16-1991 ESD test guide to obtain a product's MTBUR. Examples of results from actual product tests are used to show how Method B is used to find MTBUR.