Patent ID: 7633097

Claim:
A structure comprising: a textured substrate, wherein: a textured surface of the substrate is a non-III-nitride surface; the texture on the substrate comprises a pattern of repeating features; the features have a length of at least 1 micron; and the features have a height between 0.1 micron and 1 micron; a first III-nitride region formed directly on the textured surface of the substrate, the first III-nitride region being substantially free of voids and having a defect density greater than 10 9 cm −2 ; a second III-nitride region disposed on the first III-nitride region, the second III-nitride region having an average defect density less than the first III-nitride region; and a light emitting region disposed between an n-type region and a p-type region, the light emitting region overlying the second III-nitride region; wherein the first III-nitride region comprising: a defect reduction layer and a coalescence layer; and wherein a surface of the coalescence layer is smoother than a surface of the defect reduction layer.