Patent ID: 8318555

Claim:
A method of producing a hybrid substrate, the method comprising: preparing a first substrate comprising a mixed layer and an underlying electrically insulating continuous layer, the mixed layer comprising first monocrystalline zones of at least a first crystalline material and second adjacent amorphous zones of a second material, the second zones forming at least part of a free surface of the first substrate; bonding a second substrate to the first substrate by hydrophobic molecular bonding over at least the amorphous zones, the second substrate comprising a surface reference layer having a given crystallographic orientation; applying a heat treatment to at least to the mixed layer, the heat treatment adapted to induce the recrystallization in solid phase of at least part of the amorphous zones following the crystallographic orientation of the reference layer, the reference layer acting as a recrystallization seed through a molecular bonding interface; and inducing a separation at the molecular bonding interface between the reference layer of the second substrate and the at least partly recrystallized amorphous zones of the first substrate.