Methods for preparing a melt of silicon powder for silicon crystal growth
Methods for preparing a melt from silicon powder for use in growing a single crystal or polycrystalline silicon ingot in accordance with the Czochralski method that include removal of silicon oxides from the powder; application of a vacuum to remove air and other oxidizing gases; controlling the pos...
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Main Authors | , |
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Format | Patent |
Language | English French German |
Published |
26.02.2014
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Subjects | |
Online Access | Get full text |
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Summary: | Methods for preparing a melt from silicon powder for use in growing a single crystal or polycrystalline silicon ingot in accordance with the Czochralski method that include removal of silicon oxides from the powder; application of a vacuum to remove air and other oxidizing gases; controlling the position of the charge relative to the heater during and after melting of the powder and maintaining the charge above its melting temperature for a period of time to allow oxides to dissolve; and use of a removable spacer between the crucible sidewall and the silicon powder charge to reduce oxides and silicon bridging. |
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Bibliography: | Application Number: EP20130174922 |