Seed Production and Melt Replenishment for the Czochralski Growth of Silicon Germanium

• Authors: N. Armour , S. Dost
• Languages of publication: EN

Abstracts

EN

The silicon transport in a silicon-germanium melt has been studied to address the issues of melt replenishment and seed production for the Czochralski growth of silicon germanium (SiGe) crystals. The growth of SiGe single crystals by the Czochralski method requires that the melt be replenished with silicon during the growth process due to the rejection of germanium into the melt during solidification. To facilitate the replenishment of the melt, an accurate knowledge of the dissolution rate of silicon into the melt and its transport through the melt is required. To address these issues, a number of experiments have been carried out on the dissolution of silicon into a germanium melt. Liquid phase diffusion growth experiments were also conducted for insight into transport and as a possible method for seed crystal production. The experiments encompassed various temperatures, crucible geometries, crucible translation, and magnetic field levels to determine optimum conditions for the most favorable dissolution rates and mass transport in the melt. Results have shown that replenishment from bottom of the crucible is most effective due to the enhanced silicon transport by buoyancy. The application of magnetic fields may also provide an effective mean to control the replenishment rate (mass transport rate) in the melt.

Keywords

EN

61.82.Fk; 81.10.Dn; 66.10.C-

Discipline

• 66.10.C-: Diffusion and thermal diffusion(for osmosis in biological systems, see 82.39.Wj in physical chemistry; for cellular transport, see 87.16.dp and 87.16.Uv in biological physics)
• 81.10.Dn: Growth from solutions
• 61.82.Fk: Semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 2
• Pages: 198-212

Dates

published

2013-08

Contributors

author

N. Armour

• Crystal Growth Laboratory, University of Victoria, Victoria, BC, V8W 3P6, Canada

author

S. Dost

• Crystal Growth Laboratory, University of Victoria, Victoria, BC, V8W 3P6, Canada

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Identifiers

DOI

10.12693/APhysPolA.124.198