Estimating a life expectancy of high-density recordable optical disks

摘要

We examine a lifetime estimation method for high-density recordable optical disks. It is based on the Eyring acceleration model and statistical analysis. The statistical distribution of life data for the optical disk assumed a lognormal distribution. The standardized life expectancy of an optical disk is defined as the minimum lifetime of 95% survival probability at 25°C/50%RH with a 95% confidence level. An acceleration test was conducted under stress conditions of temperature and relative humidity. Results have demonstrated that the statistical distribution of lifetime data using the digital error criterion item can be applied to a lognormal distribution. Thereby, we can estimate a standard life expectancy of high-density recordable optical disks as the minimum lifetime of 95% survival probability at a 95% confidence level.