Patent ID: 8933532
Filing Date: 2015-01-13
Classification: H01L

Abstract:
1. A method of fabricating a diode in gallium nitride (GaN) materials, the method comprising: providing a n-type GaN substrate having a first surface and a second surface; forming a first n-type GaN epitaxial layer coupled to the first surface of the n-type GaN substrate; forming a p-type GaN epitaxial layer coupled to the first n-type GaN epitaxial layer; removing at least a portion of the p-type GaN epitaxial layer to form a plurality of p-type device structures; forming a second n-type GaN epitaxial layer coupled to the plurality of p-type device structures; removing at least a portion of the second n-type GaN epitaxial layer to expose a portion of at least one p-type device structure; and forming a first metallic structure electrically coupled to the exposed portion of the at least one p-type device structure and a remaining portion of the second n-type GaN epitaxial layer, wherein the first metallic structure is not in direct contact with the first n-type GaN epitaxial layer, and wherein a portion of the exposed portion of the at least one p-type device structure remains exposed.