Patent ID: 8841202
Filing Date: 2014-09-23
Classification: H01L

Abstract:
1. A method of producing a hybrid substrate comprising: preparing a first substrate having at least one monocrystalline layer of a first material; separating the first substrate into first and second substrate parts, such that each of the first and second substrate parts has a surface, and such that a crystalline axis of each surface substantially coincides upon separation; preparing a temporary substrate by forming, directly on the surface of the first substrate part, a mixed layer comprising first areas of at least one second material, the first areas having a difference of composition or crystallographic form with respect to the first material, and adjacent second areas of an amorphous third material, the second areas having one or both of a different composition or crystallographic form with respect to the first areas and form at least part of a free surface of the temporary substrate; bonding the temporary substrate, by molecular bonding over at least the second areas of the free surface of the temporary substrate, to the surface of the second substrate part, so that the second areas are in contact with the first and second substrate parts and the surface of the second substrate part has the same crystal orientation as the surface of the first substrate part; and applying a heat treatment to at least the mixed layer that is adapted to cause, selectively with respect to the first areas, a solid phase recrystallization of at least part of the second areas according to the common crystal orientation of the two surfaces of the first and second substrate parts.