Abstract:
A method of producing a layer of cavities in a structure (100) comprises at least one substrate (101) formed from a material that can be oxidized or nitrided, the method comprising the following steps: implanting ions (10) into said substrate (101) in order to form an implanted ion concentration zone (102) at a predetermined mean depth; heat treating the implanted substrate to form a layer of cavities (103) at the implanted ion concentration zone (102); and forming an insulating layer (105) in said substrate by thermochemical treatment from one surface of said substrate, said insulating layer that is formed extending at least partially into the layer of cavities (103).
Abstract:
The present invention notably concerns a method to fabricate and treat a structure of semiconductor-on-insulator type, successively comprising a carrier substrate (1), an oxide layer (3) and a thin layer (2) of semiconducting material, according to which: 1) a mask is formed on said thin layer (2) so as to define exposed regions (20), on the surface of said layer, which are not covered by the mask; 2) heat treatment is applied so as to urge at least part of the oxygen of the oxide layer (3) to diffuse through the thin layer (2), leading to controlled removal of the oxide in the regions (30) of the oxide layer (3) corresponding to the desired pattern; characterized in that said carrier substrate (1) and thin layer (2) are arranged relative to each other so that their crystal lattices, in a plane parallel to their interface (I), together form an angle called a "twist angle" of no more than 1°, and in a plane perpendicular to their interface (I) an angle called a "tilt angle" of no more than 1°, and in that a thin layer (2) is used whose thickness is less than 1100 Å.
Abstract:
The present invention relates to a method for making a structure notably intended for applications in the fields of electronics, optics or optoelectronics, which comprises a thin layer (1) of semiconducting material on a supporting substrate (3), according to which: a) said thin layer (1) is adhesively bonded on said supporting substrate (3) by molecular adhesion; b) said thereby obtained structure is heat-treated in order to stabilize the adhesive bonding interface (2), characterized by the fact that prior to step b), it is proceeded with an implantation of ions at said interface (2), so as to transfer atoms from the thin layer (1) to the supporting substrate (3), and/or from the supporting substrate (3) to the thin layer (1).
Abstract:
The invention relates to a method for fabricating a mixed orientation substrate comprising the steps of providing a donor substrate with a first crystalline orientation, forming a predetermined splitting area in the donor substrate, providing a handle substrate, in particular of a second crystalline orientation, attaching the donor substrate to the handle substrate and detaching the donor substrate at the predetermined splitting area thereby transferring a layer of the donor substrate onto the handle substrate to form a mixed orientation substrate. In order to cope with stress introduced during ion implantation, a stiffening layer is provided on the donor substrate prior to forming the predetermined splitting area.
Abstract:
The invention concerns a process to treat a structure of semiconductor-on-insulator type, successively comprising a carrier substrate, an oxide layer (2) and a thin layer of a semiconductor material (3), said structure having a peripheral ring in which the oxide layer (2) is exposed, said process comprising application of a main thermal treatment in a neutral or controlled reducing atmosphere. It comprises a step to cover at least an exposed peripheral part of the oxide layer (2), prior to said main thermal treatment, this latter treatment being conducted under controlled time and temperature conditions so as to urge at least part of the oxygen in the oxide layer (2) to diffuse through the thin semiconductor layer (3), leading to controlled reduction of the thickness of the oxide layer (2).
Abstract:
Method for producing stacked UTBOX-like semi-conductor structures, said method comprising: a) the formation of an electrical insulator layer on a donor substrate, b) the introduction of elements into the donor substrate through the insulator layer, c) the formation of an electrical insulator layer, on a second substrate known as final substrate, d) the bonding of the two substrates, the two insulator layers limiting the diffusion of water and forming an insulator layer buried between the two substrates, of thickness less than 50 nm, the donor oxide layer having, during the bonding, a thickness at least equal to that of the bonding oxide layer.
Abstract:
The present invention relates to a process for manufacturing a structure comprising a germanium layer (3) on a support substrate (1), characterised in that it comprises the following steps: (a) formation of an intermediate structure (10) comprising said support substrate (1), a silicon oxide layer (20) and said germanium layer (3), the silicon oxide layer (20) being in direct contact with the germanium layer (3), (b) application to said intermediate structure (10) of a heat treatment, in a neutral or reducing atmosphere, at a defined temperature and for a defined time, to diffuse at least part of the oxygen from the silicon oxide layer (20) through the germanium layer (3).
Abstract:
L'invention concerne un procédé de fabrication d'une structure semi-conductrice comprenant les étapes suivantes : a) la fourniture d'une couche utile en un matériau semi- conducteur, b) la fourniture d'un substrat support en un matériau semi- conducteur, c) le dépôt d'un film composé d'un matériau semi-conducteur différent de celui ou ceux de la couche utile et du substrat support, présentant une épaisseur inférieure à 50 nm, sur la face libre à assembler de la couche utile et/ou sur la face libre à assembler du substrat support, d) la formation d'une structure intermédiaire, comprenant un assemblage direct, le long d'une interface de collage s'étendant selon un plan principal, des faces libres à assembler respectivement de la couche utile et du substrat support, la structure intermédiaire comprenant un film encapsulé issu du ou des film(s) déposés lors de l'étape c), e) le recuit de la structure intermédiaire à une température supérieure ou égale à une température critique, de manière à provoquer la segmentation du film encapsulé et à former la structure semi-conductrice comprenant une zone d'interface entre la couche utile et le substrat support, ladite zone d'interface comportant : - des régions de contact direct entre la couche utile et le substrat support, et - des agglomérats comprenant le matériau semi-conducteur du film, et présentant une épaisseur, selon un axe normal au plan principal, inférieure ou égale à 250 nm; les régions de contact direct et les agglomérats étant adjacents dans le plan principal.
Abstract:
L'invention concerne un procédé de fabrication d'une structure composite (1) comprenant une couche mince (10) en carbure de silicium monocristallin disposée sur un substrat support (20) en carbure de silicium. Le procédé comprend : a) une étape de fourniture d'un substrat initial (11) en carbure de silicium monocristallin, b) une étape de croissance par épitaxie d'une couche donneuse (110) en carbure de silicium monocristallin sur le substrat initial (11), pour former un substrat donneur (111), c) une étape d'implantation ionique d'espèces légères dans la couche donneuse (110), pour former un plan fragile enterré (12) délimitant la couche mince (10), d) une étape de formation d'un substrat support (20) en carbure de silicium sur la surface libre de la couche donneuse (110), comprenant un dépôt à une température comprise entre 400°C et 1100°C, e) une étape de séparation le long du plan fragile enterré (12), pour former d'une part la structure composite (1) et d'autre part le reste du substrat donneur (111'), f) une étape de traitement(s) mécano-chimique(s) de la structure composite (1).
Abstract:
L'invention concerne un procédé de fabrication d'une structure (S) par assemblage d'au moins deux substrats (S1, S2), I'un au moins de ces deux substrats étant destiné à être utilisé dans I'électronique, I'optique, I'optoélectronique et/ou le photovoltaïque, la structure comprenant au moins deux interfaces de séparation (11, I2) s'étendant parallèlement aux faces principales de ladite structure, en vue d'une séparation de ladite structure (S) le long d'une interface (11) choisie parmi lesdites interfaces, ladite séparation étant réalisée par I'insertion d'une lame (B) entre lesdits substrats (S1, S2) et l'application par ladite lame d'un effort d'écartement des deux substrats, caractérise en ce qu'il comprend la formation de I'interface (11) choisie pour la séparation de sorte a ce qu'elle soit plus sensible que la(les) autre(s) interface(s) (12) a la corrosion sous contrainte, c'est-à-dire à l'action combinée dudit effort d'écartement et d'un fluide susceptible de rompre des liaisons siloxane (Si-O-Si) présentes à ladite interface (l1). L'invention concerne également un procédé de séparation d'une structure (S) susceptible d'être obtenue par ledit procédé.