Patent ID: 6809044
Filing Date: 2004-10-26
Classification: H01L,Y10S

Abstract:
A process for making a thin film starting from a substrate of a solid material having a plane face comprising:the implantation of gaseous compounds in the substrate to make a layer of micro-cavities at a depth from the plane face corresponding to the thickness of the required thin film, the gaseous compounds being implanted under conditions that could weaken the substrate at the layer of micro-cavities; and partial or total separation of the thin film from the rest of the substrate, this separation comprising a step in which thermal energy is added to provoke coalescence of at least part of the micro-cavities while a pressure is applied to the plane face, said applied pressure being adjusted during said coalescence to remain above a pressure called the limiting pressure, below which blisters appear on the plane face and above which blisters do not wear on the plane face.