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Etude expérimentale et thermodynamique du procédé de démouillage appliqué aux semiconducteurs

Abstract : The "dewetting" process is a modified Vertical Bridgman process that allows avoiding solid-crucible contacts thanks to the formation of a gap during the crystal growth of semiconductor materials. This process reduces drastically the density of crystalline defects (dislocations and secondary nucleation). It depends mainly on the capillary phenomena and especially on the wetting properties of the melt on the crucible walls. In this work, we have shown experimentally that the dewetting results from the displacement of a stable meniscus along the walls during the solidification of the indium and gallium antimonides in sealed fused silica crucibles. Equilibrium thermodynamics computations have been carried out in order to explain the role of the chemical pollution in this experimental configuration.
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https://tel.archives-ouvertes.fr/tel-00368731
Contributor : Yannick Champion <>
Submitted on : Tuesday, March 17, 2009 - 2:42:27 PM
Last modification on : Thursday, November 19, 2020 - 3:54:17 PM
Long-term archiving on: : Saturday, November 26, 2016 - 6:34:19 AM

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  • HAL Id : tel-00368731, version 1

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Lamine Sylla. Etude expérimentale et thermodynamique du procédé de démouillage appliqué aux semiconducteurs. Matériaux. Institut National Polytechnique de Grenoble - INPG, 2008. Français. ⟨tel-00368731⟩

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