A hybrid (logic+I/sub DDQ/) testing strategy using an iterative bridging fault filtering scheme

In this paper we propose a new hybrid (logic+I/sub DDQ/) testing strategy for efficient bridging fault (BF) detection. In our strategy, logic and I/sub DDQ/ testings are applied in sequence so that BFs that can be detected by the logic testing need not be targeted by the I/sub DDQ/ testing. The logic test generation is done via an iterative BF filtering in which fault coverage is maximized through test set augmentation. As a result only a small number of BFs need to be targeted by the I/sub DDQ/ test generator. Experiments show that this approach is capable of reaching very high BF coverage with a composite (logic+I/sub DDQ/) test set with very few I/sub DDQ/ vectors.