still for the commission of the european a asked of purified kiselkristaller

摘要

A method for purifying silicon comprises extracting heat from an impure silicon in a metal solvent to provide a solid phase containing silicon in crystal form and to concentrate impurities in a molten phase. After a desired amount of heat has been extracted, a substantial part of the molten phase is separated from the solid phase. A fraction or portion of the solid phase is remelted for purposes of removing solvent metal, including impurities, from the crystals, end et least one fraction of the remelted material is separated from the crystals.