Dislocation Formation in Epitaxial Film by Propagation of Shallow Dislocations on 4H-SiC Substrate

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Abstract:

Shallow defects, which were induced by mechanical treatment, on 4H-SiC wafers were investigated. The density and the distribution in depth of shallow defects on the wafers were depended on wafer venders. Most of serious defects such as dislocation array (DA), triangular stacking fault (TRSF) and triangular defect (TRD) in epitaxial film were demonstrated to be caused by shallow dislocations on the surface of the wafers. Revised mechanical polish can reduce the densities of DA, TRSF and TRD in epitaxial film.

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Materials Science Forum (Volumes 717-720)

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383-386

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May 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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