RELAXATION OF A THIN LAYER AFTER ITS TRANSFER

摘要

The invention relates to a method of forming a relaxed or pseudo-relaxed layer on a substrate, the relaxed layer (2') being in a material selected from semiconductior materials, characterized in that the method comprises the following steps: (a) growing on a donor substrate (1) an elastically strained layer (2) consisting of at least a material selected among the semiconductor materials; (b) forming on the strained layer (2) or on a receiving substrate (7), a vitreous layer (4) made of a material viscous from a viscosity temperature; (c) bonding the receiving substrate (7), to the strained layer (2) via the vitreous layer (4); (d) removing a portion of the donor substrate (1), so as to form a structure comprising the receiving substrate (2), the vitreous layer (4), the strained layer (2) and the unremoved portion of the donor substrate (1) which thereby forms a surface layer (1B); (e) heat treating the structure at a temperature close to or higher than the viscosity temperature. The invention further relates to structures obtained during the method of forming a relaxed or pseudo-relaxed layer on a substrate.