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|Title:||Probing the SiGe virtual substrate by high-resolution channeling contrast microscopy|
|Authors:||Seng, H.L. |
|Citation:||Seng, H.L., Osipowicz, T., Sum, T.C., Tok, E.S., Breton, G., Woods, N.J., Zhang, J. (2002-04-22). Probing the SiGe virtual substrate by high-resolution channeling contrast microscopy. Applied Physics Letters 80 (16) : 2940-2942. ScholarBank@NUS Repository. https://doi.org/10.1063/1.1474597|
|Abstract:||Relaxed, epitaxial SiGe layers with low densities of threading dislocations are grown by linearly grading the Ge composition. However, such compositionally graded SiGe layers (virtual substrates) often result in a cross hatch surface morphology which affects subsequent device processing. Here, we report on high-resolution channeling-contrast-microscopy (CCM) measurements on such virtual substrates grown by gas-source molecular-beam epitaxy and low-pressure chemical vapor deposition. A two-MeV He+ beam focused to a submicron spot is used in these CCM measurements to obtain both lateral and depth-resolved information on the cross hatch features observed and their association with a slight lattice tilt. © 2002 American Institute of Physics.|
|Source Title:||Applied Physics Letters|
|Appears in Collections:||Staff Publications|
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