Patent ID: 8569737

Claim:
A III-Nitride based semiconductor device comprising: a polarization field management template of a first GaN-based material having a first conduction type, said polarization field management template comprising a patterned surface defining a plurality of concave cavities; a quantum well layer formed on and substantially conforming to said patterned surface of said polarization field management template, said quantum well layer comprising a plurality of quantum well stages, each quantum well stage comprising: an inner layer of a first nitride-based material having a first bandgap characteristic; and a pair of outer layers of a second nitride-based material different from said first nitride-based material, said pair of outer layers sandwiching said inner layer, said second nitride-based material having a second bandgap characteristic greater than said first bandgap characteristic; and a conduction layer of a second GaN-based material having a second conduction type opposite to said first conduction type, said conduction layer covering at least substantially all of said quantum well layer.