Patent ID: 8906780

Claim:
A method for transferring a thin layer of monocrystalline silicon from a free face of a donor substrate that is made of monocrystalline silicon having a thickness that is greater than that of the thin layer to be transferred, the method comprising implanting ions of at least one given species through said free face so as to form a buried brittle layer in said monocrystalline silicon, using a polymer layer, bonding said donor substrate, by said free face, to a receiver substrate, and prompting a fracture of said thin layer off of said donor substrate at said buried brittle layer by thermal fracture processing, said method further comprising selecting conditions of implantation such that a thickness of said thin layer is smaller than 10 micrometers, and a thickness of said polymer layer is below a critical threshold defined as a function of energy and dose of said implantation, said critical threshold being less than or equal to the lesser of 500 nanometers and a thickness of said thin layer.