International Conference ''Mechanisms and Nonlinear Problems of Nucleation, Growth of Crystals and Thin Films'' dedicated to the memory of the outstanding theoretical physicist Professor V.V. Slezov (Proceedings) St. Petersburg, July 1-5, 2019 Semiconductors
A new method of growing AlN, GaN, and AlGaN bulk crystals using hybrid SiC/Si substrates
Abstract:
The main principles of a new method of growing bulk single-crystal AlN, AlGaN, and GaN films with thickness from 100 $\mu$m and more on silicon substrates with a buffer silicon carbide layer with its subsequent detachment from Si substrates are presented. The main substance of this method is a combination of the method of chloride-hydride epitaxy that determines high growth rates of III nitride layers and the use a Si substrate with a buffer layer of nanoscale SiC film grown by the atomic substitution method as the growth substrate. The Si substrate with a SiC layer grown by the atomic substitution method has a number of structural, physical, and chemical features as compared to SiC layers grown on Si by the standard methods. It is shown that it is precisely this feature that enables the growth on their surfaces of thick crack-free AlN, AlGaN, and GaN layers with subsequent and quite simple their detachment from the substrate. The single-crystal crack-free AlN layers with thickness to 300 $\mu$m, AlGaN layers with thickness to 400 $\mu$m, GaN layers with thickness to 200 $\mu$m, and GaN films of the semipolar (11$\bar{2}$4) orientations with thickness to 30 $\mu$m have been grown.
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