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Journal Article 1/f noise in Si/sub 0.8/Ge/sub 0.2/ pMOSFETs under Fowler-Nordheim stress
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Authors
Young-Joo Song, Jung-Wook Lim, Bongki Mheen, Sang-Hoon Kim, Hyun-Chul Bae, Jin-Young Kang, Jeong-Hoon Kim, Jong-In Song, Kyung-Wan Park, Kyu-Hwan Shim
Issue Date
2003-04
Citation
IEEE Transactions on Electron Devices, v.50, no.4, pp.1152-1156
ISSN
0018-9383
Publisher
IEEE
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1109/TED.2003.812477
Abstract
The 1 / f noise in Si0.8Ge0.2 pMOSFETs was found to be lower than in all-silicon (Si) pMOSFETs, before and after Fowler-Nordheim (F-N) stress. The minimum noise in the Si0.8Ge0.2 pMOSFET occurred at the thinnest unconsumed Si-cap of approximately 2 nm, because of the reduced-oxide trap density (Not) near the Fermi level (EF) in the device. However, all samples in this study, including the Si control and the Si0.2Ge0.2 pMOSFETs with different unconsumed Si-cap thicknesses of 21-64 횇, revealed almost identical relative changes in 1 / f noise due to the stress, despite the relatively wide range of initial noise values. This suggests identical relative changes in Not at the EF in the devices during F-N stress.
KSP Keywords
1/f Noise, Fermi level, Fowler-Nordheim (F-N) stress, Fowler-Nordheim stress, Minimum Noise, Oxide trap density, Si-CaP, Wide range