POLYSILICON TRANSPORTATION DEVICE AND A REACTOR SYSTEM AND METHOD OF POLYCRYSTALLINE SILICON PRODUCTION THEREWITH
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United States of America Patent
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Apr 16, 2015
app pub date -
Oct 11, 2013
filing date -
Oct 11, 2013
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Abstract
A method and system for reduction or mitigation of metal contamination of polycrystalline silicon are disclosed. A conveyance device comprising a flexible synthetic resin tube having an inner surface at least partially coated with an inner layer comprising elastomeric microcellular polyurethane is disclosed for use in fluidized bed reactor operations associated with manufacture and product handling procedures for ultra pure granular polysilicon. Use of the conduit to effect passage of the polysilicon mitigates foreign metal contact contamination from sources otherwise typically present in such manufacturing units.
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