Advances in integrated circuit design and packaging techniques have introduced new ESD-susceptible (Electrostatic Discharge) circuit interfaces. This document will introduce these interfaces and the methods that were used to investigate their ESD robustness. Two test chips were designed to aid the analysis. The specialized design choices that allow for distinguishing between multiple failure locations are thoroughly illustrated. The testing plan is detailed and the test chip measurement results are analyzed. The results will compare different ESD protection techniques and illustrate the importance of having ESD protection at these interfaces. The results will also show how some interfaces are inherently more robust than others during a CDM(Charged Device Model) event. Finally, the effects on the intensity of the CDM stress based on single-die or stacked-die packages will be compared.
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Charged device model electrostatic discharge failures in system on a chip and system in a package designs