A Hybrid (Logic+IDDQ) Testing Strategy Using An Iterative Bridging Fault Filtering Scheme

In this paper we propose a new hybrid (logic+I DDQ ) testing strategy for efficient bridging fault (BF) detection. In our strategy, logic and I DDQ testings are applied in sequence so that BFs that can be detected by the logic testing need not be targeted by the I 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 DDQ test generator. Experiments show that this approach is capable of reaching very high BF coverage with a composite (logic+I DDQ ) test set with very few I DDQ vectors. 1 Introduction Due to the high integration density of VLSI circuits, bridging faults (a physical defect that cause a faulty resistive short between two nodes in the circuit), have become one of the most frequently occurring physical faults. In order to achieve high IC manufacturability, testing for BF with high BF coverage is necessary. Logic and ..