Failure mode-key factor of a failure analysis' success

Failure mode is behavior of a component after failure. The confirmation of failure mode is the first and the most important step in a failure analysis. Many symptoms may appear when a component fails, but which are substantial and can be defined as failure modes should be made clear, for failure mode is the direction of a failure analysis and is the key factory of its success, an inaccurate failure mode may bring a completely different conclusion. A failure case is presented in this paper to expatiate the importance of failure mode on failure analysis.