Title

Growth of Binary Alloyed Semiconductor Crystals by the Vertical Bridgman-Stockbarger Process with a Strong Magnetic Field

Document Type

Article

Publication Date

1-2005

Publication Source

Journal of Fluids Engineering

Volume

127

Issue

3

Inclusive pages

523-528

DOI

10.1115/1.1899169

Publisher

The American Society of Mechanical Engineers

Place of Publication

United States

ISBN/ISSN

00982202

Abstract

This paper presents a model for the unsteady species transport for the growth of alloyed semiconductor crystals during the vertical Bridgman-Stockbarger process with a steady axial magnetic field. During growth of alloyed semiconductors such as germanium-silicon (GeSi) and mercury-cadmium-telluride (HgCdTe), the solute’s concentration is not small, so that density differences in the melt are very large. These compositional variations drive compositionally driven buoyant convection, or solutal convection, in addition to thermally driven buoyant convection. These buoyant convections drive convective transport, which produces nonuniformities in the concentration in both the melt and the crystal. This transient model predicts the distribution of species in the entire crystal grown in a steady axial magnetic field. The present study presents results of concentration in the crystal and in the melt at several different stages during crystal growth.

Keywords

mueller, ma, lapointe, heat transfer, crystals, brigdman-stockbarger process

Disciplines

Engineering

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