Abstract
Role of 3C-SiC intermediate layer (3C-SiC IL) and a propagation of crystal defects from 3C-SiC IL to III-nitride epilayers has been investigated by observing the interface between the 3C-SiC IL and III-nitride epilayers. We found that better quality epilayers were obtained by using such intermediate layers than by direct growth on Si substrates. In the case of III-nitride epilayers grown directly on Si, the layers grown at the initial stage are not flat. The 3C-SiC IL grown on Si (111) substrates has many stacking faults (SFs) that form along the 3C-SiC {111} planes. The initial III-nitride films have V-shaped trenches due to the SFs of the 3C-SiC IL. However, some SFs do not lead to the V-shaped defects.
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