Reliability modeling method of electronic products considering failure mechanism dependence

There are varieties of failure mechanisms in electronic product, and they show a very strong dependence between each other. Understanding and describing the dependence of failure mechanism is the basis for product reliability prediction and assessment based on physics of failure. Starting from the characteristic of failure mechanism, this paper studies the classification of failure mechanism correlations, derives the mathematical model of reliability of each single failure mechanism correlation, and studies system reliability modeling method of electronic product considering failure mechanisms dependence based on reliability block diagram. Taking a voltage protection module as example, failure correlation between different components and dependence between mechanisms in one component are both discussed, their reliability models are built, and reliability parameters of the voltage protection module are obtained eventually.