An Experiment on Intermittent-Failure Mechanisms.

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Abstract:

Intermittent failures are studied by stressing temperature, supply voltage and extra loading good parts. The behavior of the chips under stress is similar to that of a marginal chip under normal operating conditions. The experiments show that most intermittent failures are pattern-sensitive for both sequential and combinational circuits. The stuck-at fault model is shown to be inappropriate to describe intermittent failures. This paper presents a case where a single intermittent failure is not detected by a test set with 100 single stuck-at fault coverage. A stress-strength analysis is presented to explain the experimental results. Keywords Intermittent failures, Pattern sensitive faults, Soft failures, Integrated circuit reliability, Intermittent fault model.

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