Patent ID: 8716716

Claim:
A semiconductor structure comprising: a GaN substrate having a first surface and a second surface opposing the first surface, wherein the GaN substrate is characterized by a first conductivity type and a first dopant concentration; a first GaN epitaxial layer of the first conductivity type coupled to the second surface of the GaN substrate; and a second GaN epitaxial layer of a second conductivity type coupled to the first GaN epitaxial layer, wherein the second GaN epitaxial layer comprises: an active device region; a first junction termination region in contact with the active device region of the second GaN epitaxial layer, characterized by an implantation region having a first implantation profile; and a second junction termination region in contact with the first junction termination region of the second GaN epitaxial layer, characterized by an implantation region having a second implantation profile.