The study of activation energy(Ea) by aging and high temperature storage for quartz resonator's life evaluation

This paper studied the mechanisms and models of activation energy(Ea) based on the experiment data from quartz resonator long-term aging and high temperature storage. Furthermore, the product's life could be forecasted under the thermal and bias accelerated environment. 5.0 mm × 3.2 mm metal sealed quartz resonators were used for case study, it indicated the activation energy of high temperature storage which only effected by thermal acceleration factor is higher than aging one. The activation energy of long-term aging shows cube decay tendency when thermal and bias accelerators both exist, that would dramatically reduce the predicted accuracy of product life. The activation energy of current manufactured 5.0 mm × 3.2 mm metal sealed quartz resonator was confirmed as 0.578 eV by regress verification according to the Arrhenius accelerated theory, 85°C for 7 days accelerated aging can predict and guarantee which is equivalent as continue operation for 0.83 year at 25°C without fail.