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Forming Gas Annealing Characteristics of Germanium-on-Insulator Substrates

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2 Author(s)
Hai-Yan Jin ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA ; Cheung, Nathan W.

Large-area layer transfer of germanium-on-insulator (GeOI) substrates has been fabricated by ion-cut processes. Pseudo-MOSFET structure was employed to characterize interface trap density, interface fixed charge density, interface carrier mobility, and bulk carrier mobility of these GeOI substrates with various annealing conditions in forming gas ambient. High-temperature annealing in the vicinity of 500degC-600degC has shown the best carrier mobilities, with the interface trap density and the interface fixed charge density as low as 1010 q/cm2. The extracted bulk hole mobility of the annealed GeOI is near 500 cm2/( V middots), which is higher than that of silicon [300 cm2/(V middots)] at the same doping concentration level.

Published in:

Electron Device Letters, IEEE  (Volume:29 ,  Issue: 7 )

Date of Publication:

July 2008

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