Solarworld Aktiengesellschaft

Matthias Pfaffelhuber

Leslaw Mleczko

Heiko Herold

Günter Holdenried

Theo König

Karl-Theodor König

H Günter Holdenried

The present invention relates to a method for producing highly pure, granular silicon with a narrow particle-size distribution by decomposing silanes or halosilanes in a fluidised bed and epitaxially growing silicon on silicon seed particles, which method is characterised in that the gas containing silicon is supplied to the reaction chamber in an upward flow and the contents of the fluidised bed are separated in a continuous or discontinuous manner, whereby a particle stream from the fluidised bed is supplied to a separator mounted outside the fluidised bed, particles of the desired size are separated and undersized particles are returned to the fluidised bed. The invention also relates to a device and the use thereof for carrying out said method.

Method for producing highly pure, granular silicon in a fluidised bed

A device for electrically heating a vertically erect chamber comprising several heating zones arranged vertically one above the other. The components of the device, with the exception of the insulating components, are made from graphite materials. Each zone (Z) comprises a number of supports (), arranged in an essentially even distribution around the chamber for heating, which simultaneously serve as electrical supplies for the heater, and the heater for each zone (Z) is fixed at one end and longitudinally displaceable at the other end.

Device for electrically heating a vertically erect chamber

The invention relates to a method for producing hyper-pure, granular silicon by decomposing a gas containing silicon in a reactor consisting of a silicon carbide-based, carbon-fiber reinforced material; to a corresponding reactor; and to the use of said reactor for producing silicon.

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League City, TX, United States of America

Matthias Pfaffelhuber