Patent ID: 8039869

Claim:
A gallium nitride device substrate, comprising a first layer of gallium nitride containing a first concentration of indium located over a substitute substrate, where the first concentration of indium causes strain in the first layer of gallium nitride containing the first concentration of indium so that a lattice parameter of the first layer of gallium nitride containing the first concentration of indium conforms to a lattice parameter of an underlying layer of gallium nitride, and where absence of a sacrificial substrate and the underlying layer of gallium nitride results in a strain relieved first layer of gallium nitride containing the first concentration of indium that forms a surface of the gallium nitride device substrate in which the first layer of gallium nitride containing a first concentration of indium has a composition of In x Ga 1-x N, where 0.1≦x≦0.5.