C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
C30B 25/18 (2006.01) C30B 29/40 (2006.01) H01L 21/20 (2006.01)
Patent
CA 2540245
The invention relates to a method for the production of self-supporting substrates comprising element III nitrides. More specifically, the invention relates to a method of producing a self-supporting substrate comprising a III-nitride, in particular, gallium nitride (GaN), which is obtained by means of epitaxy using a starting substrate. The invention is characterised in that it consists in depositing a single-crystal silicon-based intermediary layer by way of a sacrificial layer which is intended to be spontaneously vaporised during the III-nitride epitaxy step. The inventive method can be used, for example, to produce a flat, self-supporting III-nitride layer having a diameter greater than 2''.
La présente invention concerne l'élaboration de substrats autosupportés de nitrures d'éléments III. L'invention a plus particulièrement pour objet un procédé de réalisation d'un substrat autosupporté de nitrure d'élément III, et en particulier de nitrure de gallium (GaN) , obtenu par épitaxie à partir d'un substrat de départ caractérisé en ce qu'il comporte un dépôt d'une couche intermédiaire à base de silicium monocristalline à titre de couche sacrificielle destinée à être vaporisée spontanément lors de l'étape d'épitaxie du nitrure d'élément III. Ce procédé permet notamment l'obtention d'une couche autosupportée de nitrure d'élément III, plane et de diamètre supérieur à 2".
Bougrioua Zahia
Feltin Eric Pascal
Nataf Gilles
Centre National de La Recherche Scientifique (cnrs)
Robic
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