Patent ID: 8034208

Claim:
A method of transferring one layer in a first material onto a second substrate of a second material, the method comprising: a) forming a first embrittlement plane in a first substrate of first material, by a first ion implantation or atom implantation, or both, through a first face of the first substrate; b) forming a second embrittlement plane in the first substrate, by a second ion implantation or atom implantation, or both, either before or after the first ion or atom implantation, through a second face of the first substrate, in order to reduce a curvature of the first substrate; c) assembling the first face of the first substrate with the second substrate, or depositing the second substrate on the first face of the first substrate; and d) separating a layer from the first substrate at the level of the first embrittlement plane, without separation at the level of the second embrittlement plane.