Vol.1, No.1, 2005, pp.33-44, doi:10.3970/fdmp.2005.001.033
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ARTICLE
Effects of Rotation on Heat Flow, Segregation, and Zone Shape in a Small-scale Floating-zone Silicon Growth under Axial and Transversal Magnetic Fields
  • C. W. Lan1, B. C. Yeh
Department of Chemical Engineering National Taiwan University, Taipei 10617, Taiwan, ROC Email: cwlan@ntu.edu.tw Fax: 8862-2363-3917.
Abstract
The suppression of unstable Marangoni convection in floating-zone crystal growth by magnetic fields has enjoyed over recent years a widespread use as a reliable and useful strategy. A transversal direction of the field is particularly efficient, but asymmetric zone shapes and thus segregation are induced. Counter-rotation of the feed and of the crystal rods is a common way to improve dopant homogeneity. However, its effects under magnetic fields are complex and have not yet been studied in detail. In the present analysis, three-dimensional (3D) simulations based on a finite-volume/multigrid method are used to illustrate the effects of rotation on the heat flow, dopant segregation, and the zone shape for a small-scale floating-zone silicon growth under both axial and transversal magnetic fields. The role of electrical conductivity of the crystal is also taken into account.
Keywords
Rotation, Convection, Segregation, Magnetic field, Lorentz force, Floating-zone method.
Cite This Article
Lan, C. W., Yeh, B. C. (2005). Effects of Rotation on Heat Flow, Segregation, and Zone Shape in a Small-scale Floating-zone Silicon Growth under Axial and Transversal Magnetic Fields. FDMP-Fluid Dynamics & Materials Processing, 1(1), 33–44.