Patent ID: 8501139
Filing Date: 2013-08-06
Classification: B22F,C01B,C22C,C30B

Abstract:
1. A method for producing a silicon (Si) and/or germanium (Ge) foil, said method comprises: dissolving Si and/or Ge source material in a molten metallic bath to form a molten solution, wherein a density of solid Si and/or Ge is lower than a density of the molten metallic bath by at least 1 g/cm cooling at least a portion of the molten solution from a saturation temperature through an initial precipitation temperature to a lower temperature T and separating at least a portion of the floating Si and/or Ge foil from the interfacial area when a thickness of the at least a portion of the floating foil, which thickness is measured along a direction perpendicular to the interfacial area, is in a range from about 10 micrometers to about 200 micrometers.