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Structure and Characteristics of Strained-Si-On-Insulator (Strained-SOI) MOSFETs

Published online by Cambridge University Press:  15 March 2011

Shin-ichi Takagi ,
Tsutomu Tezuka ,
Naoharu Sugiyama ,
Tomohisa Mizuno  and
Atsushi Kurobe
Shin-ichi Takagi
Affiliation:
Advanced LSI Technology Laboratory, Corporate Research & Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 210-8582, Japan
Tsutomu Tezuka
Affiliation:
Advanced LSI Technology Laboratory, Corporate Research & Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 210-8582, Japan
Naoharu Sugiyama
Affiliation:
Advanced LSI Technology Laboratory, Corporate Research & Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 210-8582, Japan
Tomohisa Mizuno
Affiliation:
Advanced LSI Technology Laboratory, Corporate Research & Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 210-8582, Japan
Atsushi Kurobe
Affiliation:
Advanced LSI Technology Laboratory, Corporate Research & Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 210-8582, Japan
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Abstrct:

Strained-Si MOSFET is an attractive device structure to be able to relax several fundamental limitations of CMOS scaling, because of high electron and hole mobility and compatibility with Si CMOS standard processing. In this paper, we present a new device structure including strained-Si channel, strained-SOI MOSFET, applicable to CMOS under sub-100 nm technology nodes. The main feature of this device is that thin strained-Si channel/relaxed SiGe hetero-structures are formed on buried oxides. The principle and the advantages are described in detail. The strained-SOI MOSFETs, whose electron and hole mobility is 1.6 and 1.3 times, respectively, higher than in conventional MOSFETs, have successfully been fabricated by combining the SIMOX technology with re-growth of strained Si films. We also present novel fabrication techniques to realize ultra-thin SiGe-on-Insulator (SGOI) virtual substrates with high Ge content, including Ge condensation due to oxidation of SGOI with lower Ge content. Strained-Si/SGOI structures with total thickness of 21 nm and Ge content of 56 % have been fabricated by oxidizing SiGe films on conventional SOI substrates and re-growing strained-Si films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 686: Symposium A – Materials Issues in Novel Si-Based Technology , 2001 , A1.3
Copyright
Copyright © Materials Research Society 2002

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