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

Lookup NU author(s): Dr Sarah Olsen, Professor Anthony O'Neill, Luke Driscoll, Dr Kelvin Kwa, Dr Sanatan Chattopadhyay, Dr David Robbins



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.

Publication metadata

Author(s): Olsen SH, O'Neill AG, Driscoll LS, Kwa KSK, Chattopadhyay S, Waite AM, Tang YT, Evans AGR, Norris DJ, Cullis AG, Paul DJ, Robbins DJ

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Electron Devices

Year: 2003

Volume: 50

Issue: 9

Pages: 1961-1969

Print publication date: 01/09/2003

ISSN (print): 0018-9383

ISSN (electronic): 1557-9646

Publisher: IEEE


DOI: 10.1109/TED.2003.815603


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