Methodology for ensuring high reliability of VLSI systems

As the complexity and density of VLSI systems increase, the logical test of systems based on stuck-at fault model is not sufficient to guarantee the high reliability of the system. Recently, a new test approach based on current monitoring, called I ddq test, becomes very important since it can overcome limitations of the conventional logic test. In this work, intra-gate bridge fault is defined and analyzed, and a theorem for full detection of the intra-gate bridge faults is presented. The proposed algorithm can be used effectively for testing highly reliable systems such as ATM switches and electronic equipments of automobiles and airplanes.