Evaluation of VDMOS Storage Failure Rate Based on Accelerated Factor
The method of evaluation of VDMOS storage failure rate is presented and explained in this paper. To obtain a large number of devices working hours in a short time, the accelerated factor k is brought into the failure rate test, from which the test time can be reduced to 1/k. In this paper, the failure rate test of VDMOS is carried out at 270 °C about 1500 hours with the accelerator factor k=21.73079. The storage lifetime of VDMOS was calculated over 10 years. The key parameters have been measured and reliability of VDMOS in ten years storage time has been evaluated.
N. Wan et al., "Evaluation of VDMOS Storage Failure Rate Based on Accelerated Factor", Advanced Materials Research, Vols. 317-319, pp. 1149-1152, 2011