Current-Leakage Kinetics Across Tinned Cr/Cu Lands Having Epoxy Overlay

A leakage current between Cr/Cu conductors on a ceramic vehicle coated with an epoxy layer is described. The leakage is measured under stress conditions of temperature, relative humidity (RH), and voltage. A model is developed to project the leakage results to field conditions as a function of the stress, gap, and diffusion properties.