Arrhenius Acceleration Factor

Thermal Sensitivity

Activation energy values define how sensitive a specific failure mode is to changes in temperature. The arrhenius acceleration factor depends on this energy level, which is unique to processes like electromigration or dielectric breakdown. A higher activation energy means that a small temperature increase leads to a much larger acceleration of the aging process.

Reliability Prediction

Calculated lifespan estimates for electronic assemblies rely on these factors to connect laboratory results and field performance. An arrhenius acceleration factor allows for the conversion of hours spent in a high temperature oven into equivalent years of service at room temperature. Without this conversion, a manufacturer would need to wait decades to confirm the durability of a new product.

Calculation Method

Standard formulas for this metric involve the Boltzmann constant and the absolute temperature in Kelvin. The arrhenius acceleration factor is determined by taking the exponential of the ratio of activation energy to the product of the constant and temperature. Scientists compare the result for the stress temperature against the result for the use temperature to find the final ratio.

This value represents a linear multiplier applied to the test time to find the actual life. In a scenario where the factor is 50, a test duration of 1000 hours equates to 50000 hours of real world operation. This logic holds only as long as the failure mechanism remains the same at both temperatures.