Removing impurities from a melt, comprises providing a crucible with a melt of non-ferrous metal or semiconductor material, directionally solidifying the melt to form solidified block, and removing a portion of residual melt from crucible

摘要

Removing impurities from a melt, comprises: providing at least a first crucible (1) with a melt of a non-ferrous metal, preferably a semiconductor material; directionally solidifying the melt to form a solidified block (15), which is adjoined in a region of a solidification front of a liquid phase of the residual me and removing at least a portion of the residual melt from the crucible. The flow of the solidification font during the solidification is affected by an asymmetric temperature field in such a manner that the residual melt is collected in a predetermined area in the crucible. Removing impurities from a melt, comprises: providing at least a first crucible (1) with a melt of a non-ferrous metal, preferably a semiconductor material, where the crucible exhibits a base (3) and at least one side wall (4), and is partially surrounded with a temperature-regulating device (27); directionally solidifying the melt to form a solidified block (15) in the crucible, which is adjoined in a region of a solidification front of a liquid phase of the residual me and removing at least a portion of the residual melt from the crucible. The flow of the solidification font during the solidification of the melt is affected by an asymmetric temperature field in such a manner that the residual melt is collected in a predetermined area in the crucible. An independent claim is also included for a device for removing impurities from a concentrated melt, comprising: (a) a crucible for receiving a melt of a semiconductor material, and for solidifying the melt, with a base vertically extending in a vertical direction, and at least one adjoining side wall, where the side wall is extended from the base in the vertical direction to an upper end; (b) at least one temperature-regulating device for controlling the solidification process of the me and (c) a removing device for removing a portion of the melt from the crucible, where at least one temperature-regulating device is arranged and/or controlled in such a manner that the heat input is increased in a predetermined partial-area of the crucible for producing an asymmetric temperature field locally in the crucible.