Patent ID: 7875534
Filing Date: 2011-01-25
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure, the method comprising: providing a substrate; forming a buffer/nucleation layer over the substrate; after the step of forming the buffer/nucleation layer, performing a first nitridation step on the buffer/nucleation layer; forming a first group-III nitride (III-nitride) layer over the buffer/nucleation layer, wherein the first III-nitride layer is of p-type, and wherein no nitridation step is performed on the first III-nitride layer; forming a second III-nitride layer over the first III-nitride layer, wherein the second III-nitride layer is of n-type; and after the step of forming the second group-III nitride layer, performing a second nitridation step on the second group-III nitride layer.