Patent ID: 9293327
Filing Date: 2016-03-22
CPC Classification: C30B,H01L

Claim Text:
1. A method for producing semiconductor thin films, characterized by the combination of the following steps: a) on a foreign substrate, a thin layer of polycrystalline semiconductor material is applied; b) the foreign substrate is heated to such an extent that the semiconductor thin film melts at a temperature above the melting temperature of the semiconductor thin film, whereafter the temperature is slowly decreased to below the melting temperature of the semiconductor thin film and until solidification of the semiconductor thin film, and then further down to normal temperature; c) when the temperature is decreased to below the melting temperature of the semiconductor thin film, the foreign substrate is heated, wherein a heat source is attached in a planar fashion directly to the uncoated surface of the foreign substrate, or wherein the foreign substrate is heated by direct electric current passage, so that the temperature, starting from the contact surface of the foreign substrate with the thin film, continuously decreases in the vertical direction straight through the semiconductor thin film up to the surface of the thin film.