US Patent 8410525 Compound semiconductor substrate and device therewith

A semiconductor device is formed on a semiconductor substrate, which is comprised of: a base substrate; and a multilayer being formed on the base substrate and having a surface serving for an interface with the semiconductor device, the multilayer including alternating layers of a first compound semiconductor and a second compound semiconductor materially distinguishable from the first compound semiconductor, one selected from the group consisting of the first compound semiconductor and the second compound semiconductor being doped with one selected from the group consisting of carbon and transition elements.