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- W2003449218 abstract "Direct comparison of ZrO 2 and HfO 2 on Ge substrates was performed in terms of the realization of an ultrathin gate stack with low leakage current. Changes in the interfacial layer thickness, film dielectric constant and leakage current upon postdeposition annealing were investigated. Considerable thinning of the interfacial layer due to interdiffusion with ZrO 2 was observed after annealing. Moreover, the high dielectric constant of ZrO 2 was retained even after Ge incorporation by interdiffusion. These phenomena resulted in a small capacitance equivalent thickness (CET) of 1.2 nm. On the other hand, the interfacial layer under the high-permittivity (high-κ) film remained almost the same for HfO 2 on Ge stack, resulting in a relatively large CET of 1.6 nm. Together with the fact that the leakage current is lower for the ZrO 2 stack than that for the HfO 2 stack, ZrO 2 is considered to be preferable to HfO 2 ." @default.
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- W2003449218 date "2005-04-01" @default.
- W2003449218 modified "2023-09-26" @default.
- W2003449218 title "Direct Comparison of ZrO<sub>2</sub> and HfO<sub>2</sub> on Ge Substrate in Terms of the Realization of Ultrathin High-κ Gate Stacks" @default.
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- W2003449218 doi "https://doi.org/10.1143/jjap.44.2323" @default.
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