What is the activation energy for Nitronex’s NRF1 process and is it valid at lower temperatures?
A 3-tempature DC life-test is used to determine the activation energy for the process. In this test, devices were stressed at junction temperatures of 260, 285, and 310°C. A failure criteria of 15% drift in in-situ drain current was applied. Data was fit to a cumulative failure plot showing a lognormal distribution. Finally the MTTFs (mean-time-to-failures) for each group were plotted on an Arrhenius plot and revealed activation energy of 2.0eV. For more details… While the fit is excellent in the 260-310°C range, Nitronex is aware that another activation energy can exist at lower temperatures.
