Device, useful for producing silicon blocks from a melt by directional solidification, comprises growth chamber with melt absorbable rectangular melt container surrounded from mantle- and cover heating devices, and floor-heating device

摘要

Device for producing silicon blocks from a melt by a directional solidification comprises: at least one growth chamber (14), in which a melt absorbable rectangular melt container (1) is arranged, and the container is surrounded from at least a mantle heating device (2) and/or a cover heating device; and a floor-heating device. The mantle heating device and/or the cover heating device and the floor-heating device are respectively formed as a heater-magnet module for heating the melt and simultaneous production of a moving magnetic field. An independent claim is also included for producing the silicon blocks from the melt by the directional solidification in a rectangular melt container, comprising melting the starting material into a melt in the melt container, generating a temperature gradient in the melt by a defined heat supply running in a vertical direction, and thus triggering the directional solidification of the melt from a melt container floor to a melt container edge, where additionally at least a moving magnetic field is allowed to act on the melt. A downward migrating or inversely migrating magnetic moving field is generated in the melt from the melt container edge to the melt container floor, and/or additionally a downward migrating or inversely migrating magnetic moving field is generated from the melt container center for a melt container inner wall.