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Enhanced Hole Mobility in High Ge Content Asymmetrically Strained-SiGe p-MOSFETs

Author(s)
Chleirigh, C. Ni; Gomez, Leonardo; Hashemi, Pouya; Hoyt, Judy L.
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Abstract
The hole mobility characteristics of ⟨110⟩ /(100)-oriented asymmetrically strained-SiGe p-MOSFETs are studied. Uniaxial mechanical strain is applied to biaxial compressive strained devices and the relative change in effective hole mobility is measured. The channel Ge content varies from 0 to 100%. Up to −2.6% biaxial compressive strain is present in the channel and an additive uniaxial strain component of −0.06% is applied via mechanical bending. The hole mobility in biaxial compressive strained-SiGe is enhanced relative to relaxed Si. It is observed that this mobility enhancement increases further with the application of ⟨110⟩ longitudinal uniaxial compressive strain. The relative change in mobility with applied stress is larger for biaxial compressive strained-SiGe than for Si and increases with the amount of biaxial compressive strain present in the channel.
Date issued
2010-06
URI
http://hdl.handle.net/1721.1/69026
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
IEEE Electron Device Letters
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Gomez, Leonardo et al. “Enhanced Hole Mobility in High Ge Content Asymmetrically Strained-SiGe p-MOSFETs.” IEEE Electron Device Letters 31.8 (2010): 782-784. Web. 3 Feb. 2012. © 2010 Institute of Electrical and Electronics Engineers
Version: Final published version
Other identifiers
INSPEC Accession Number: 11433128
ISSN
0741-3106
1558-0563

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