Compatibility of HfN Metal Gate Electrodes With Hf0.5Zr0.5O2 Ferroelectric Thin Films for Ferroelectric Field-Effect Transistors
Compatibility of HfN Metal Gate Electrodes With Hf0.5Zr0.5O2 Ferroelectric Thin Films for Ferroelectric Field-Effect Transistors
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HfN金属栅电极与铁电场效应晶体管Hf0.5Zr0.5O2铁电薄膜的兼容性
DOI:
10.1109/led.2018.2868275
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发表时间:
2018-09
影响因子:
4.9
通讯作者:
Yichun Zhou
中科院分区:
文献类型:
--
作者:
Binjian Zeng;Wenwu Xiao;Jiajia Liao;Heng Liu;Min Liao;Qiangxiang Peng;Shuaizhi Zheng;Yichun Zhou
Compatibility of hafnium nitride (HfN) electrodes with Hf0.5Zr0.5O2 (HZO) ferroelectric thin films was investigated for ferroelectric field-effect transistor (FeFET) applications. It was found that HZO thin films capped by HfN top electrodes offer improved ferroelectric properties and lower leakage current densities compared to HZO thin films capped by TiN top electrodes. Moreover, FeFETs with HfN/HZO (10 nm)/SiO2 gate-stacks showed a fast write speed of 100 ns, a large 10-year extrapolated memory window (MW) of 0.92 V, and a moderate MW of 0.5 V after 104 program/erase cycles. This letter represents a first attempt to fabricate high-performance FeFET memory devices with a fully hafnium-based gate-stack.
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