Patent ID: 8193020

Claim:
A method for forming an N-polar group III-nitride layer, comprising: obtaining a growth surface of a substrate, wherein the growth surface has a misorientation angle between 0.5 and 10 degrees relative to a miller indexed crystallographic plane [h, i, k, l] of the substrate, where h, i, k, l are miller indices; growing a group III-nitride layer on the growth surface, wherein the group III-nitride layer has an orientation other than an N-polar [000-1] orientation; growing a transition layer on the group III-nitride layer, wherein the transition layer establishes an N-polar [000-1] orientation for one or more subsequent layers grown on the transition layer; and growing an N-polar group III-nitride layer on the transition layer, wherein the N-polar group III-nitride layer has the N-polar [000-1] orientation established by the transition layer.