Impacts of work function variation and line-edge roughness on TFET and FinFET devices and 32-bit CLA circuits

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Title:	Impacts of work function variation and line-edge roughness on TFET and FinFET devices and 32-bit CLA circuits
Authors:	胡璧合;Chen, Yin-Nien;Chen, Chien-Ju;Fan, Ming-Long;Hu, Vita;Su, Pin;Chuang, Ching-Te
Contributors:	資訊電機學院電機工程學系
Keywords:	carry-lookahead adder (CLA);Circuits;Computer simulation;Delay;Devices;FinFET;line-edge-roughness (LER);Roughness;Tables (data);tunnel FET (TFET);Voltage;work function variation (WFV);Work functions
Date:	2015-05-21
Issue Date:	2026-04-23 14:14:05 (UTC+8)
Publisher:	MDPI Multidisciplinary Digital Publishing Institute;Basel: MDPI AG
Abstract:	摘要： In this paper, we analyze the variability of III-V homojunction tunnel FET (TFET) and FinFET devices and 32-bit carry-lookahead adder (CLA) circuit operating in near-threshold region. The impacts of the most severe intrinsic device variations including work function variation (WFV) and fin line-edge roughness (fin LER) on TFET and FinFET device Ion, Ioff, Cg, 32-bit CLA delay and power-delay product (PDP) are investigated and compared using 3D atomistic TCAD mixed-mode Monte-Carlo simulations and HSPICE simulations with look-up table based Verilog-A models calibrated with TCAD simulation results. The results indicate that WFV and fin LER have different impacts on device Ion and Ioff. Besides, at low operating voltage (<0.3 V), the CLA circuit delay and power-delay product (PDP) of TFET are significantly better than FinFET due to its better Ion and Cg,ave and their smaller variability. However, the leakage power of TFET CLA is larger than FinFET CLA due to the worse Ioff variability of TFET devices. 出版者： Basel: MDPI AG 出版日期： 2015-05-21 出處： Journal of low power electronics and applications, 2015-05, Vol.5 (2), p.101-115 資源來源： ProQuest Open Access Content Collection 版權： Copyright MDPI AG 2015 識別號： ISSN: 2079-9268 識別號： EISSN: 2079-9268 識別號： DOI: 10.3390/jlpea5020101
Appears in Collections:	[Department of Electrical Engineering] journal & Dissertation

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