Abstract
This paper presents a scalable method to generate close to minimal size test pattern sets for stuck-at faults in scan based circuits. The method creates sets of potentially compatible faults based on necessary assignments. It guides the justification and propagation decisions to create patterns that will accommodate most targeted faults. The technique presented achieves close to minimal test pattern sets for ISCAS circuits. For industrial circuits it achieves much smaller test pattern sets than other methods in designs sensitive to decision order used in ATPG.
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