摘要:
Two wafers, each having on a surface thereof a thin silicon or silicon oxide film, are bonded by subjecting the thin film of at least one wafer to a surface treatment forming a thin silicon oxynitride surface film with a thickness of less than 5 nm. The thin film is formed by means of a nitrogen-based plasma, generated by an inductively coupled plasma source. In addition, the potential difference between the plasma and a substrate holder supporting said wafer, during the surface treatment, is less than 50 V, advantageously less than 15 V and preferably zero. This makes it possible to obtain a defect-free bonding interface irrespective of the temperature of any heat treatment carried out after the contacting step.
摘要:
Process for producing a structure by direct adhesive bonding of two elements comprising the production of the elements to be assembled and the assembly of said elements, in which the production of the elements to be assembled comprises the steps: - deposition on a substrate of a TiN layer by physical vapour deposition, - deposition of a copper layer on the TiN layer, and in which the assembly of said elements comprises the steps: - polishing the surfaces of the copper layers intended to come into contact so that they have a roughness of less than 1 nm RMS and hydrophilic properties, - bringing said surfaces into contact, - storing said structure at atmospheric pressure and at ambient temperature.
摘要:
The invention relates to a method for transferring a single-crystal silicon thin film (3) from a donor substrate (1) made of single-crystal silicon, in which: the implantation conditions are such that the thickness of the thin film (3) is less than 10 μm; and the thickness of a polymer layer (5) for gluing the thin film to a receiving substrate is less than a critical threshold defined in accordance with the energy and amount of the implantation, said critical threshold being less than or equal to the smallest of the following two quantities: 500 nm; and the thickness of the future thin film.
摘要:
The invention relates to a method for determining a minimum tension compensation stress for a membrane with a thickness no higher than one micron, secured to a frame having, in the absence of external stress, a desired deflection, in which: a°) the length, width and thickness of the membrane are selected, as well as the material and a residual stress thereof; b°) the weight of the membrane is calculated; c°) β, C and C* are calculated using suitable software; d°) the calculated deflection h is deduced; e°) the deflection is compared with the desired deflection; f°) if said calculated deflection is greater than the desired deflection, the residual stress is adjusted so that the calculated deflection is no higher than the desired deflection; g°) when the calculated deflection is no higher than the desired deflection, the minimum tension compensation stress is calculated.
摘要:
The invention concerns a device consisting of microstructures or nanostructures on a support. The invention is characterised in that the support comprises: a substrate (1) including at least a part made of crystalline material, said part having a surface (2) exhibiting a stress field or a topology associated with a stress field, the stress field being associated with dislocations; an intermediate layer (3) integral with said surface (2) and having a thickness and/or a composition and/or a state enabling transmission of said stress field through said layer up to its free surface which bears the microstructures or nanostructures (4).
摘要:
The invention concerns a method for treating a substrate comprising a semi-conducting layer (4) on at least one of its surfaces. Said method comprises a step for annealing the substrate and a step for forming an oxide layer (6) at the semi-conducting layer (4) surface, carried out before the end of the annealing step, protecting the remainder of the semi-conducting layer (4).