Patent ID: 9029210
Filing Date: 2015-05-12
Classification: H01L,Y10S

Abstract:
1. A method for fabricating a vertical superjunction device, the method comprising: providing a III-nitride substrate of a first conductivity type; forming a first III-nitride epitaxial layer of the first conductivity type coupled to the III-nitride substrate; forming a second III-nitride epitaxial layer coupled to the first III-nitride epitaxial layer; forming a third III-nitride epitaxial layer of the first conductivity type coupled to the second III-nitride epitaxial layer; removing a portion of the third III-nitride epitaxial layer and a portion of the second III-nitride epitaxial layer to expose a sidewall of the second III-nitride epitaxial layer and an exposed surface of the first III-nitride epitaxial layer; forming a masking material coupled to a surface of a remaining portion of the third III-nitride epitaxial layer; forming a fourth III-nitride epitaxial layer of the first conductivity type coupled to the sidewall of the second III-nitride epitaxial layer and the exposed surface of the first III-nitride epitaxial layer; forming a fifth III-nitride epitaxial layer of a second conductivity type coupled to the fourth III-nitride epitaxial layer; removing at least a portion of the masking material to expose: forming one or more insulating structures coupled to the fifth III-nitride epitaxial layer.