Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9830094 | Journal of Crystal Growth | 2005 | 8 Pages |
Abstract
We have investigated bulk growth of 6H-SiC crystals along the [011¯5] direction. The (011¯5) facet was obtained in a natural way during growth experiments using close-to-equilibrium conditions which facilitate facets appearance. Seeded growth using (011¯5)-oriented seeds was demonstrated. The occurrence of the (011¯5) facet depended strongly on the thermal field geometry. When tailoring a flat thermal field a big facet of 15 mm in diameter was obtained. Hollow micropipe defects propagating along the c-axis of the seed were vanished in the grown crystal leading to a completely micropipe-free region. Polytype information seemed to be transmitted along the c-axis whereas hollow cores propagated along the usual growth direction due to voids migration. Growth along the [011¯5] direction is considered to be very promising for preparation of micropipe-free SiC crystals.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Z.G. Herro, B.M. Epelbaum, M. Bickermann, C. Seitz, A. Magerl, A. Winnacker,