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Wafer level reliability (WLR) issues of DRAM cell and peripheral transistors are discussed. Since the 70 nm technology node, recessed transistors have been accepted for assuring data retention time of DRAM cell transistors. Various recessed transistor structures suggest that the most important issue in reliability, in addition to optimizing data retention time, is the elimination of local regions...
Screening latent defects in a wafer test process is very important task in both reducing memory manufacturing cost and enhancing the reliability of emerging package products such as SIP, MCP, and WSP. In terms of the package assembly cost, these package products are required to adopt the KGD (known good die) quality level. However, the KGD requires a long burn-in time, added testing time, and high...
NBTI has been extensively studied to understand physics of degradation in recent years. However, little has been done to find out the lifetime distributions of NBTI at both transistor and product level, which are important in reliability prediction and improvement. In this paper, Monte-Carlo simulation is carried out to study the NBTI lifetime distribution at transistor level. Lognormal distribution...
3D contactless technology based on capacitive coupling represents a promising solution for high-speed and low power signaling in vertically integrated chips. AC coupled interconnects do not suffer from mechanical stress, and the parasitic load is much reduced when compared to standard DC solutions, such as wire bonding and micro bumps. Communication system based on wireless interconnection scheme...
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