High-performance nMOSFETs using a novel strained Si/SiGe CMOS architecture

被引：73
|
作者：
Olsen, SH [1 ]
O'Neill, AG
Driscoll, LS
Kwa, KSK
Chattopadhyay, S
Waite, AM
Tang, YT
Evans, AGR
Norris, DJ
Cullis, AG
Paul, DJ
Robbins, DJ
机构：
[1] Univ Newcastle, Sch Elect Elect & Comp Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[2] Univ Southampton, Dept Elect & Comp Sci, Southampton SO17 1BJ, Hants, England
[3] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England
[4] QinetiQ, Malvern WR14 3PS, Worcs, England
[5] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
IEEE TRANSACTIONS ON ELECTRON DEVICES | 2003年 / 50卷 / 09期
基金：
英国工程与自然科学研究理事会;
关键词：
CMOS; drain-current enhancement; nMOSFETs; self-heating; SiGe; strained silicon; thermal budget; transconductance enhancement; virtual substrate;
D O I：
10.1109/TED.2003.815603
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Performance enhancements of up to 170% in drain current, maximum transconductance, and field-effect mobility are presented for nMOSFETs fabricated with strained-Si channels compared with identically processed bulk Si MOSFETs. A novel layer structure comprising Si/Si0.7Ge0.3 on an Si0.85Ge0.15 virtual substrate (VS) offers improved performance advantages and a strain-compensated structure. A high thermal budget process produces devices having excellent on/off-state drain-current characteristics, transconductance, and subthreshold characteristics. The virtual substrate does not require chemical-mechanical polishing and the same performance enhancement is achieved with and without a titanium salicide process.
引用
收藏
页码：1961 / 1969
页数：9
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