Patent ID: 7273798

Claim:
A method of forming a gallium nitride device substrate, comprising: providing a first sacrificial substrate; forming a layer of gallium nitride over the first sacrificial substrate; forming a first layer of gallium nitride containing an additional lattice parameter altering element over the layer of gallium nitride, the additional lattice parameter altering element causing the first layer of gallium nitride containing the lattice parameter altering element to grow strained so that a lattice parameter of the first layer of gallium nitride containing the lattice parameter altering element conforms to a lattice parameter of the layer of gallium nitride; attaching a substitute substrate to the first layer of gallium nitride containing an additional lattice parameter altering element; and removing the sacrificial substrate and the layer of gallium nitride, causing the lattice parameter of the first layer of gallium nitride containing the lattice parameter altering element to relax, and revealing the first layer of gallium nitride containing the lattice parameter altering element.