Patent ID: 8642443

Claim:
A method of forming islands of at least partially relaxed strained material on a target substrate which comprises: forming islands of strained material over one face of a first substrate; forming a seed layer on the first substrate before forming the islands of strained material; implanting ionic species in a region within the seed layer on the first substrate, or in the first substrate, to form a weakened layer prior to bonding; bonding the face of the first substrate to a target substrate; and thereafter, detaching the first substrate from the target substrate and at least partially relaxing the islands of the strained material by a first heat treatment, wherein the heat treatment for relaxing the strained layer causes the detachment of the first substrate at the weakened layer such that the detachment and relaxation occurs simultaneously with the islands of at least partially relaxed strained material bonded to the target substrate detached and physically moved away from the first substrate.