Table 5.
Maximum value of the failure rate vs. parameters of the lognormal distribution and activation energy
| Variant | Median time of the lognormal distribution tm(h) | Standard deviation of the lognormal distribution σ | Activation energy with temperature of the failure mechanism EA(eV) | Maximum value of the failure rate λ (h-1) | Time moment of the maximum value for the failure rate (h) |
|---|---|---|---|---|---|
| 1 | 2 × 107 | 1.2 | 1.0 | 3.5 × 10-8 | 1.5 × 107 |
| 2 | 6 × 107 | 2.0 | 1.0 | 10-8 | 107 |
| 3 | 2 × 106 | 1.2 | 0.8 | 3.5 × 10-7 | 1.5 × 106 |
| 4 | 8 × 106 | 2.0 | 0.8 | 8 × 10-8 | 2 × 106 |