METHOD FOR PRODUCING SEMI-CONDUCTING MATERIAL WAFER BY MOLDING AND DIRECTIONAL CRYSTALLIZATION

摘要

PROBLEM TO BE SOLVED: To provide a method for producing semi-conducting material wafers, the method being easy to implement while at the same time ensuring a good crystallographic quality and enabling high solidification rates to be achieved. SOLUTION: Wafers of a semi-conducting material are formed by molding and directional crystallization from a liquid mass 9 of this material. A seed 8, situated at the bottom of the crucible, presents an orientation along non-dense crystallographic planes. A mold 5 is filled with the molten semi-conducting material 9 by means of a piston 7 or by creation of a pressure difference in the device. The mold 5 is preferably coated with an anti-adhesive deposit. COPYRIGHT: (C)2009,JPO&INPIT