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Reliabilities of high-k stacked gate dielectrics are discussed from the viewpoint of the impact of initial traps in high-k layer. TDDB reliability can be explained by the generated subordinate carrier injection (GSCI) model. While initial traps increase the leakage current, they do not degrade the TDDB reliability. In contrast, the BTI reliability is strongly degraded by initial traps.
Continuous scaling, necessary for enhanced performance and cost reduction, has pushed existing CMOS materials much closer to their intrinsic reliability limits, forcing reliability engineers to get a better understanding of circuit failure. This requires that designers will have to be very careful with phenomena such as high current densities or voltage overshoots. In addition to the reliability issues,...
The electric field and temperature dependencies of time-dependent dielectric breakdown (TDDB) degradation in Cu/low-k damascene structures are investigated using Cu/SiOC and Cu/SiCN damascene structures. A field-dependent activation energy analysis of TDDB lifetimes demonstrates that there are multiple TDDB degradation mechanisms for a Cu/SiOC structure and that the dominant TDDB degradation mechanism...
The write/erase cyclability of Co-rich Pt/Co disks was studied, along with factors limiting the cyclability. Annealing experiments suggested that a decrease in CNR results from degradation of the perpendicular magnetic anisotropy in a Pt/Co film heated by an erasing laser beam. The main mechanism of degradation is atomic intermixing at the interface in Pt/Co multilayers. In the case of a Pt/Co film...
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