摘要:
Method for producing nanostructures comprising: a step of providing a substrate (100) having a buried barrier layer (2) and above said barrier layer (2) a crystalline film (5) provided with a network of crystalline defects and/or stress fields (12) in a crystalline zone (13), one or several steps of attacking the substrate (100), of which a preferential attack either of the crystalline defects and/or the stress fields, or the crystalline zone (13) between the crystalline defects and/or the stress fields, said attack steps enabling the barrier layer (2) to be laid bared locally and protrusions (7) to be formed on a nanometric scale, separated from each other by hollows (7.1) having a base located in the barrier layer, the protrusions leading to nanostructures (7, 8).
摘要:
This invention relates to a process for controlling the orientation of secondary structures (A1, A2) with at least a crystalline part during the transfer of secondary structures from a primary structure (A) on which the secondary structures have an initial crystalline orientation identical to the orientation of the primary structure, onto at least one support structure (B), the process comprising: a) the formation of at least one orientation mark (Va, Va1, Va2) when the secondary structures are fixed to the primary structure (A), the mark having an arbitrary orientation with respect to the said initial crystalline orientation, but identical for each secondary structure, and b) when a set of secondary structures is transferred onto at least one support structure (B), an arrangement of the secondary structures so that their orientation marks can be oriented in a controlled manner.
摘要:
The invention relates to a sealing process for two wafers (2, 12) made of semiconducting materials, comprising: a step for implantation of metallic species (4) in at least the first wafer, a step for assembly of the first and second wafer, an annealing step.
摘要:
The invention concerns a method of making a complex microelectronic structure by assembling two substrates through two respective linking surfaces, the structure being designed to be dissociated at a separation zone. The invention is characterized in that is consists, prior to assembly, in producing a state difference in the tangential stresses between the two surfaces to be assembled, said difference being selected so as to obtain in the assembled structure a predetermined stress state at the time of dissociation.
摘要:
The invention relates to a method of producing a complex microelectronic structure, in which two basic microelectronic structures (1, 3) are assembled at the two respective connecting faces (3) thereof. The invention is characterised in that, before assembly, a difference is created in the tangential stress state between the two faces to be assembled, said difference being selected such as to produce a pre-determined stress state within the assembled structure under given conditions in relation to the assembly conditions.
摘要:
The invention relates to a process for making a thin film starting from a substrate (1) of a solid material with a plane face (2) comprising: the implantation of gaseous compounds in the substrate (1) to make a layer of micro-cavities (4) at a depth from the said plane face (2) corresponding to the thickness of the required thin film, the gaseous compounds being implanted under conditions that could weaken the substrate at the layer of micro-cavities, partial or total separation of the thin film from the rest of the substrate (1), this separation comprising a step in which thermal energy is added and pressure is applied to the said plane face (2).
摘要:
The aim of the invention is a method for producing a layer (2) of a first material embedded in a substrate (1) comprising at least one second material. The method comprises the following stages: formation in the substrate (1), at the level of the desired embedded layer, of a layer of microcavities intended to serve as centers of nucleation to produce said first material in said second material, formation of precipitate embryos from the nucleation centers formed, the precipitate embryos corresponding to the first material, growth of the precipitates from the embryos through species concentration corresponding to the first material and carried to the microcavity layer.
摘要:
A process for the selective transfer of elements from a transfer support to a reception support, the elements bonding through a first face to the transfer support according to a defined bonding energy, the elements each having a second face configured to contact with the reception support. Elements to be transferred are transferred by applying a bonding energy between them and the reception support that exceeds the bonding energy between their first face and the transfer support. Elements not to be transferred onto the transfer support are retained.
摘要:
A method for producing of at least one photovoltaic cell includes successively the anisotropic etching of a surface of a crystalline silicon substrate and the isotropic etching treatment of said surface. The isotropic etching treatment includes at least two successive operations respectively consisting in forming a silicon oxide thin film with a controlled average thickness, ranging between 10 nm and 500 nm and in removing said thin film thus-formed. The operation consisting in forming a silicon oxide thin film on the face of the substrate is carried out by a thermally activated dry oxidation. Such a method makes it possible to improve the surface quality of the surface of the substrate once said surface is etched in an anisotropic way.
摘要:
A method for obtaining a film made out of a first material on a polymer support, said method comprising bonding a first wafer to a second wafer, thereby defining a bonding interface between said first wafer and said second wafer, at least one of said first and second wafers comprising a layer of said first material situated in proximity to said bonding interface, in said first wafer, hollowing out a cavity, said cavity comprising a bottom parallel to said bonding interface that defines, in said first wafer, a bottom zone at a controlled distance relative to said second wafer, forming, in said cavity, a polymer layer on a thickness controlled from a bottom thereof to obtain a combined wafer portion, said combined wafer portion comprising a bottom zone formed by said polymer layer on said bottom and a peripheral zone, and eliminating said second wafer on a major portion of a thickness thereof, thereby releasing, beneath said polymer layer, a film comprising said layer of said first material.