An optimized diagnostic procedure for pre-bond TSV defects

Based on a recent pre-bond TSV probing technique, this paper proposes an iterative greedy procedure to sort the order of test sessions for reducing pre-bond TSV test time. We then combine that session sorting procedure with two existing methods to develop a 3-Step test time Optimization Simulator named “SOS3”. SOS3 consists of an ILP (integer linear programming) model for session generation, the greedy procedure for session sorting, and a TSV identification algorithm for early test termination. Experiments are done for various TSV networks and two observations are made. First, session sorting plays an important role within SOS3 as it helps to further reduce pre-bond test time expectation and thus reduces pre-bond TSV test cost. Second, SOS3 as a framework greatly speeds up the pre-bond TSV test.