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- W2103408478 abstract "In this letter, we present a comprehensive study on longterm reliability of ultrathin TaN-gated chemical vapor deposition gate stack with EOT=8.5-10.5. It is found that, due to the asymmetric band structure of HfO/sub 2/ gate stack with an interfacial layer, the HfO/sub 2/ gate stack shows polarity-dependent leakage current, critical defect density, and defect generation rate, under gate and substrate injection. However, no such polarity dependence of time-to-breakdown (T/sub BD/) is observed when T/sub BD/ is plotted as a function of gate voltage. The 10-year lifetime of an HfO/sub 2/ gate stack is projected to be Vg=-1.63 V for the equivalent oxide thickness (EOT) =8.6 and Vg=-1.88 V for EOT=10.6 at 25/spl deg/C. These excellent reliability characteristics are attributed to reduced leakage current of HfO/sub 2/ gate stack with physically thicker films that result in larger critical defect density and Weibull slope to that of SiO/sub 2/ for the same EOT. However, at 150/spl deg/C, and with area scaling to 0.1 cm/sup 2/ and low percentile of 0.01%, the maximum allowed voltages are projected to Vg=-0.6 V and -0.75 V for EOT of 8.6, and 10.6, respectively." @default.
- W2103408478 created "2016-06-24" @default.
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- W2103408478 date "2004-01-01" @default.
- W2103408478 modified "2023-09-27" @default.
- W2103408478 title "TDDB and Polarity-Dependent Reliability of High-Quality, Ultrathin CVD>tex<$hbox HfO_2$>/tex<Gate Stack With TaN Gate Electrode" @default.
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- W2103408478 doi "https://doi.org/10.1109/led.2003.821590" @default.
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