The inadequacy of the stuck-at fault model for testing mos lsi circuits: a review of mos failure mechanisms and some implications for computer-aided design and test of mos lsi circuits

The stuck-at fault model is widely used as the basis for automatic test pattern generation in digital circuit testing, for example the D-algorithm. However, there have been growing doubts over the ability of the model to cover faults that occur in MOS LSI circuits. The paper consists of a review of the failure mechanisms that produce faults in MOS LSI circuits, a discussion of the problems that arise when using the stuck-at fault model to test MOS LSI circuits and a set of guidelines for the future development of computer-aided design and test of such circuits.