Patent ID: 9136116
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A method of forming a lateral p-n junction in III-nitride materials, the method comprising: providing an n-type III-nitride substrate; forming an n-type epitaxial layer coupled to the n-type III-nitride substrate; forming an etch/regrowth mask coupled to a surface of the n-type III-nitride substrate; removing at least a portion of the n-type epitaxial layer to define a recessed region; diffusing an acceptor into the recessed region to form a doped region extending from the recessed region into the substrate, wherein the doped region of the substrate and the substrate adjacent to the doped region collectively form a p-n junction spaced apart from the recessed region and extending along an entire depth of the recessed region; loading the substrate into an MOCVD reactor; removing a portion of the doped region using an in-situ etch process to undercut the etch/regrowth mask; and regrowing a p-type epitaxial layer coupled to the doped region, wherein the surface of the n-type III-nitride substrate is free from the regrown p-type epitaxial layer.