Patent ID: 8679946

Claim:
A process for manufacturing a stacked structure comprising at least one thin layer bonded to a target substrate, comprising the steps of: a) forming a thin layer by introduction of gaseous species into an initial substrate, to form a weakened layer separating a film from the rest of the initial substrate, the thin layer having a free face called the first contact face, b) bonding the first contact face of the thin layer with a face of an intermediate substrate by molecular adhesion, c) fracturing the initial substrate at the weakened layer so as to expose a free face of the thin layer called the second contact face and opposite the first contact face, wherein said fracturing comprises subjecting the assembly consisting of the initial substrate and the intermediate substrate to a heat treatment, d) bonding a face of a target substrate with at least part of the second contact face, and e) removing of at least part of the intermediate substrate in order to obtain the said stacked structure by separating at a second weakened layer formed by introduction of gaseous species through the free face of the thin layer after step c) and before step d, wherein said heat treatment causes bonding defects when steps b) and c) are performed using the target substrate rather than the intermediate substrate, said bonding defects resulting from the difference between the coefficients of thermal expansion of the material of the first contact face of the thin layer and of the material of the face of the target substrate.