Abstract:
The invention relates to a process for fabricating a hybrid substrate (6) that can be used in the fields of optics, electronics or optoelectronics. This process is noteworthy in that it comprises the following steps consisting in: a) forming or depositing a first insulator layer (2) on a first substrate chosen from two substrates, a donor substrate and a receiver substrate, which are made of semiconductor material; b) carrying out a treatment for increasing the roughness of the free surface of said first insulator layer (2); c) depositing a second insulator layer (3) thereon so as to form, between them, a trapping zone (4); d) bonding the substrate that has not been used in step a) onto said second insulator layer (3) by molecular adhesion (wafer bonding); and e) transferring an active layer (14) formed by the implantation of atomic species into said donor substrate, said trapping zone (4) being able to retain the gaseous species possibly present at the various interfaces of the hybrid substrate and to limit the formation of defects on the surface of the active layer.
Abstract:
L'invention concerne un procédé de transfert d'une couche (4) d'un substrat donneur (1) sur un substrat receveur (6) comprenant: a) une étape (S2) d'implantation ionique d'au moins une espèce dans Ie substrat donneur (1) destinée à former une couche de microcavités ou platelets, b) une étape (S3) de collage de la face (7) du substrat donneur (1) avec une face (8) du substrat receveur (6) par adhésion moléculaire, c) une étape de détachement à haute température pour détacher la couche (4) en contact avec le substrat receveur (6) par clivage au niveau de la couche de microcavités ou platelets formée dans le substrat donneur (1). Le procédé comprend en outre, une étape de traitement (Sl) du substrat donneur (1) pour piéger les atomes de l'espèce implantée lors de l'étape a) jusqu'à une température de libération atteinte lors de l'étape c) de manière à bloquer ou limiter la formation des microcavités ou platelets en dessous de la température de libération.
Abstract:
The present invention relates to a method for making a structure comprising at least one thin layer on a supporting substrate, remarkable in that it includes at least steps for forming from said supporting substrate a so-called intermediate structure comprising an amorphous layer, a first crystalline layer containing point defects and located immediately underneath said amorphous layer, a second crystalline layer located in the lower portion of the intermediate structure; bonding a receiving substrate on the upper face of said intermediate structure; removing the layer of the intermediate structure in which point defects have formed so that amorphous layer forms the upper layer of the intermediate structure. Another object of the invention relates to a substrate comprising at least one thin layer in an amorphous material on a supporting substrate, remarkable in that it comprises a receiving substrate, a central crystalline layer and an amorphous layer, said receiving substrate, the crystalline layer and the amorphous layer not having any EOR type point defect.
Abstract:
The invention relates to a method for making a substrate of the semiconductor on insulator (SeOI) type, comprising an integrated ground plane (5) under the insulating layer (3, 4), this substrate being intended to be used in making electronic components. This method is remarkable in that it comprises the steps of : implanting atoms and/or ions of a metal, in at least one portion of a semiconducting receiver substrate (D, carrying out a heat treatment of said receiver substrate (1) in order to obtain an integrated ground plane (5) on or in at least one portion of said receiver substrate (1), transferring an active layer (23) stemming from a semiconducting donor substrate onto said receiver substrate (1), an insulating layer (3, 4) being inserted in between said donor and receiver (1) substrates, so as to obtain said substrate with an integrated ground plane (5).
Abstract:
L'invention concerne un de fabrication d'une hétérostructure du type "semi-conducteur sur isolant", comprenant au moins une couche d'isolant (3, 6) intercalée entre un substrat receveur (2) et une couche active (14), issue d'un substrat donneur (1), au moins l'une desdites couches d'isolant comprenant une couche de piégeage (61), apte à retenir les espèces gazeuses présentes au niveau des différentes interfaces de l'hétérostructure et à limiter la formation de défauts à la surface de ladite couche active (14), ce procédé comprenant des étapes de collage et de transfert de couche. Conformément à l'invention, avant le collage, on procède à la formation de ladite couche de piégeage (61) par une l'implantation d'au moins une catégorie d'espèces atomiques à l'intérieur d'au moins l'une des couches d'isolant (3, 6), ces espèces atomiques étant choisies de façon à être soit identiques à l'une de celles constituant ladite couche d'isolant (3, 6), soit à appartenir à la même colonne du tableau de la classification périodique que l'une de celles-ci.
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.