標題: Experimental Study of 1/f(1+alpha) Noise in Transient Leakage Current of Metal-Insulator-Metal With Stacked High-k Polycrystalline Films
作者: Lin, Hsin-Jyun
Akiyama, Koji
Hirota, Yoshihiro
Akasaka, Yasushi
Nakamura, Genji
Nagai, Hiroyuki
Morimoto, Tamotsu
Watanabe, Hiroshi
電機工程學系
Department of Electrical and Computer Engineering
關鍵字: 1/f noise;grain boundary;high-k;leakage current;metal-insulator-metal (MIM) capacitor;polycrystalline;random telegraph noise (RTN);ZrO2
公開日期: 1-Jun-2020
摘要: We have observed and analyzed the 1/f(1+alpha) noise in transient leakage current through a metal-insulator-metal stacked high-k capacitor of TiN-ZrO2-TiO2-TiN. The ZrO2 and TiO2 films, formed by atomic layer deposition, are polycrystalline and show geometrical variety at interfaces (i.e., grain boundaries). Two types of transient leakage current are observed: 1) the monotonically decreasing component with power law dependence and 2) the uneven component having power law dependence. To analyze the uneven component in time domain, we assumed that the power law decay occurs due to a gradual change in the redistribution of electrons between interfaces of ZrO2-TiN and ZrO2-TiO2. The frequency-domain analysis shows that the 1/f(1+alpha) noise comes from the transient leakage of direct tunneling and trap-assisted tunneling (alpha > 0). In particular, the noise in the uneven component, the random telegraph noise part (alpha similar to 1), relates to local trap states in a grain boundary affected by phonon scattering. In addition, the analytical method we developed in this article shows an excellent agreement with variousmeasurements of the transient gate leakage current.
URI: http://dx.doi.org/10.1109/TED.2020.2988440
http://hdl.handle.net/11536/154509
ISSN: 0018-9383
DOI: 10.1109/TED.2020.2988440
期刊: IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume: 67
Issue: 6
起始頁: 2503
結束頁: 2509
Appears in Collections:Articles