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Novel Nickel-Alloy Silicides for Source/Drain Contact Resistance Reduction in N-Channel Multiple-Gate Transistors with Sub-35nm Gate Length

In this work, we examined the Schottky-barrier height modulation of NiSi by the incorporation of aluminum (Al), titanium (Ti), erbium (Er), and ytterbium (Yb) in NiSi to form different NiSi-alloys. Among the NiSi-alloy candidates investigated, it was found that the NiAl-alloy silicide provides the m...

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Main Authors:	Lee, R.T.P., Tsung-Yang Liow, Kian-Ming Tan, Andy Eu-Jin Lim, Hoong-Shing Wong, Poh-Chong Lim, Lai, D.M.Y., Guo-Qiang Lo, Chih-Hang Tung, Samudra, G., Dong-Zhi Chi, Yee-Chia Yeo
Format:	Conference Proceeding
Language:	English
Subjects:	Aluminum Argon Contact resistance Erbium Microelectronics Nickel alloys Silicidation Silicides Silicon carbide Titanium
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creator	Lee, R.T.P. Tsung-Yang Liow Kian-Ming Tan Andy Eu-Jin Lim Hoong-Shing Wong Poh-Chong Lim Lai, D.M.Y. Guo-Qiang Lo Chih-Hang Tung Samudra, G. Dong-Zhi Chi Yee-Chia Yeo
description	In this work, we examined the Schottky-barrier height modulation of NiSi by the incorporation of aluminum (Al), titanium (Ti), erbium (Er), and ytterbium (Yb) in NiSi to form different NiSi-alloys. Among the NiSi-alloy candidates investigated, it was found that the NiAl-alloy silicide provides the most effective Schottky-barrier height lowering (~250 meV) on n-Si(001) substrates. Integration of NiAl-alloy silicides as the source and drain (S/D) silicide material for multiple-gate transistors (MuGFETs) was explored, and shown to deliver a drive current IDsat enhancement of 34% compared to MuGFETs employing NiSi S/D. We further showed that the novel NiAl-alloy silicidation process is compatible with lattice-mismatched silicon-carbon (SiC) S/D stressors. NiAl-alloy silicide is therefore a promising S/D silicide material for reducing the high parasitic series resistance in narrow fin MuGFETs for enhanced device performance
doi_str_mv	10.1109/IEDM.2006.346915
format	conference_proceeding
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subjects	Aluminum Argon Contact resistance Erbium Microelectronics Nickel alloys Silicidation Silicides Silicon carbide Titanium
title	Novel Nickel-Alloy Silicides for Source/Drain Contact Resistance Reduction in N-Channel Multiple-Gate Transistors with Sub-35nm Gate Length
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