DEVICE AND METHOD FOR PRODUCING SELF-SUSTAINED PLATES OF SILICON OR OTHER CRYSTALLINE MATERIALS
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United States of America Patent
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Issued Date -
Apr 15, 2010
app pub date -
Mar 7, 2008
filing date -
Mar 8, 2007
priority date (Note) -
Abandoned
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Abstract
The device for producing a sheet of crystalline material by directional solidification of a material in liquid phase composed of a crucible provided with a bottom, side walls and at least one horizontal outlet slot arranged on a bottom part of a side wall. On its external surface in immediate proximity to the slot, the crucible presents electromagnetic means for creating magnetic repulsion forces on the material in liquid phase, at least at the level of the slot. An alternating current with a frequency comprised between 10 kHz and 300 kHz flows through the electromagnetic means. To foster stirring of the material in liquid phase, a low frequency can be used in addition to the above frequencies.
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