Patent ID: 8303745

Claim:
A process for forming a layer on a host substrate, the process comprising: a) depositing a monocrystalline layer onto a deposition substrate to form a deposited layer, comprising a superficial portion having a first defect density, the defects comprising crystalline defects or composition homogeneity defects, and a buried portion, having fewer defects than the superficial portion; b) thinning the deposited layer by removing the superficial portion and allowing the buried portion to remain to form a thinned layer, wherein thinning the deposited layer comprises removing at least 500 nm of material from the monocrystalline layer, and wherein the thinned layer has a second defect density that is less than the first defect density; c) implanting ions or atoms in the deposition substrate after thinning the deposited layer to form an implantation zone; d) transferring the thinned layer onto the host substrate; and e) fracturing the deposition substrate along the implantation zone.