Patent ID: 7655091

Claim:
A device for forming in the single-crystal state a compound, having an incongruent evaporation and existing in single-crystal or polycrystalline form, comprising: a first sublimation enclosure containing a single-crystal germ of said compound; a second supply enclosure; a substrate arranged between the first sublimation and second supply enclosures and separating the second supply enclosure from the first sublimation enclosure; means for supplying gas precursors of said compound into the second supply enclosure, said gas precursors causing the deposition of said compound in polycrystalline form on the substrate in said second supply enclosure; and heating means for maintaining the substrate at a temperature greater than the germ temperature to cause the sublimation of the polycrystalline source formed by said gas precursors and the deposition on the germ of said compound in single-crystal form, wherein the substrate is permeable to the gases originating from the sublimation of the polycrystalline source or allows the diffusion therethrough of the polycrystalline source.