摘要:
The present invention relates to a method for relaxing a strained material layer by providing a strained material layer and a low-viscosity layer formed on a first face of the strained material layer; forming a stiffening layer on at least one part of a second face of the strained material layer opposite to the first face thereby forming a multilayer stack; and subjecting the multilayer stack to a heat treatment thereby at least partially relaxing the strained material layer.
摘要:
The invention relates to a process for fabricating a heterostructure. This process is noteworthy in that it comprises the following steps: a) a strained crystalline thin film is deposited on, or transferred onto, an intermediate substrate; b) a strain relaxation layer, made of crystalline material capable of being plastically deformed by a heat treatment at a relaxation temperature at which the material constituting the thin film deforms by elastic deformation is deposited on the thin film; c) the thin film and the relaxation layer are transferred onto a substrate; and d) a thermal budget is applied at least the relaxation temperature, so as to cause the plastic deformation of the relaxation layer and the at least partial relaxation of the thin film by elastic deformation, and thus to obtain the final heterostructure.
摘要:
The invention relates to a process for making a GaN substrate (60), characterized in that it comprises the following steps: (a) transferring a first monocrystal GaN layer (50) onto a supporting substrate (40); (b) applying crystal growth for a second monocrystal GaN layer on the first layer (50); the first and second GaN layers thereby forming together said GaN substrate (60), said GaN substrate (60) having a thickness of at least 10 micrometers, (c) removing at least one portion of the supporting substrate (40).
摘要:
The invention relates to a method of re-forming a useful layer on a donor wafer after taking off a useful layer formed of a material chosen from among semiconductor materials. The donor wafer includes in succession a substrate and a taking-off structure, the taking-off structure includes the taken-off useful layer before taking-off. The method includes a removal of material involving a portion of the donor wafer on the side where the useful layer has been taken off. The material is removed by mechanical means so as to preserve a portion of the taking-off structure to form at least one other useful layer which can be taken off after re-forming, without adding additional material to the wafer.
摘要:
A method for making substrates for use in optics, electronics, or opto-electronics. The method may include transferring a seed layer onto a receiving support and depositing a useful layer onto the seed layer. The thermal expansion coefficient of the receiving support may be identical to or slightly larger than the thermal expansion coefficient of the useful layer and the thermal expansion coefficient of the seed layer may be substantially equal to the thermal expansion coefficient of the receiving support. Preferably, the nucleation layer and the intermediate support have substantially the same chemical composition.
摘要:
An efficient method of fabricating a high-quality heteroepitaxial microstructure having a smooth surface. The method includes detaching a layer from a base structure to provide a carrier substrate having a detached surface, and then forming a heteroepitaxial microstructure on the detached surface of the carrier substrate by depositing an epitaxial layer on the detached surface of a carrier substrate. Also included is a heteroepitaxial microstructure fabricated from such method.
摘要:
The invention relates to a method of re-forming a useful layer on a donor wafer after taking off a useful layer formed of a material chosen from among semiconductor materials. The donor wafer includes in succession a substrate and a taking-off structure, the taking-off structure includes the taken-off useful layer before taking-off. The method includes a removal of material involving a portion of the donor wafer on the side where the useful layer has been taken off. The material is removed by mechanical means so as to preserve a portion of the taking-off structure to form at least one other useful layer which can be taken off after re-forming, without adding additional material to the wafer.
摘要:
The invention relates to a process for fabricating a heterostructure. This process comprises heating an intermediate heterostructure. The intermediate heterostructure comprises a crystalline strain relaxation layer interposed directly between a first substrate and a strained layer of crystalline semiconductor material. The process further comprises causing plastic deformation of the crystalline strain relaxation layer and elastic deformation of the strained layer of crystalline semiconductor material to at least partially relax the strained layer of crystalline semiconductor material.
摘要:
The invention relates to a process for fabricating a heterostructure. This process is noteworthy in that it comprises the following steps: a) a strained crystalline thin film is deposited on, or transferred onto, an intermediate substrate; b) a strain relaxation layer, made of crystalline material capable of being plastically deformed by a heat treatment at a relaxation temperature at which the material constituting the thin film deforms by elastic deformation is deposited on the thin film; c) the thin film and the relaxation layer are transferred onto a substrate; and d) a thermal budget is applied at at least the relaxation temperature, so as to cause the plastic deformation of the relaxation layer and the at least partial relaxation of the thin film by elastic deformation, and thus to obtain the final heterostructure.
摘要:
A method of forming an epitaxially grown layer by forming a region of weakness in a support substrate to define a support portion and a remainder portion on opposite sides of the region of weakness, epitaxially growing an epitaxially grown layer on the support portion after forming the region of weakness but prior to detachment of the support portion from the remainder portion; bonding the epitaxially grown layer to an acceptor substrate before detaching the remainder portion from the support portion; and detaching the remainder portion from the support portion at the region of weakness. The epitaxially grown layer may be removed from the support portion as a free-standing structure.