Patent ID: 9437430
Filing Date: 2016-09-06
CPC Classification: H01L

Claim Text:
1. A semiconductor heterostructure comprising: an aluminum nitride single-crystal substrate; and at least one strained layer epitaxially grown thereover, the layer comprising at least one of AlN, GaN, InN, or any binary or tertiary alloy combination thereof, wherein a thickness of the strained layer exceeds a predicted critical thickness associated therewith by at least a factor of 5, as calculated with the Matthews-Blakeslee theory, where h c is the predicted critical thickness, b is the magnitude of the Burgers vector of a dislocation formed between the layer and the substrate, f is the lattice mismatch between the layer and the substrate, υ is the Poisson's ratio of the layer, λ is the angle between the slip direction of the layer and the direction in the plane of the layer perpendicular to the line of intersection of the slip plane of the layer and the interface between the layer and the substrate, and α is the angle between the dislocation and the Burgers vector of the dislocation.