Patent ID: 7510949

Claim:
A method for producing a multilayer semiconductor structure, which comprises: providing a support substrate made of a first semiconductor material having a first lattice parameter; depositing a layer of a second semiconductor material having a second lattice parameter that is substantially different than the first lattice parameter onto the support substrate to form an intermediate structure having an interface between the first and second semiconductor materials, the depositing being conducted such that most of the defects in the deposited layer are confined to an adaptation layer of the second semiconductor material layer that is located in a region adjacent to the interface; creating a zone of weakness in the intermediate structure; bonding the second semiconductor material layer to a target substrate; detaching the support substrate at the zone of weakness to obtain a multilayer semiconductor structure having an exposed surface where detached; and treating the exposed surface to assure that the adaptation layer is fully removed in order to obtain a relaxed thin layer of the second semiconductor material having a high quality surface.