Patent ID: 9196614
Filing Date: 2015-11-24
Classification: H01L

Abstract:
1. An inverted P-channel III-nitride field effect transistor with hole carriers in the channel comprising: a gallium-polar III-Nitride barrier material layer grown epitaxially on a substrate; a p-type layer or region in the barrier material layer; a second material layer; a two-dimensional hole gas in the second material at the heterointerface of the barrier material layer; and wherein the p-type region in the barrier material layer supplies hole carriers to the two-dimensional hole gas in the second material layer at the heterointerface of the barrier material layer; wherein the gallium-polar III-Nitride material comprises one or more III-Nitride epitaxial material layers grown in such a manner that when GaN is epitaxially grown the top surface of the epitaxial layer is gallium-polar; wherein p-type doped layers optimize the band diagram within the III-nitride material so that the valence band maximum at the heterointerface where the two dimensional hole gas is located is at a potential that is higher than the quasi-Fermi level for zero bias applied to a gate electrode; wherein the two-dimensional hole gas is at a heterointerface on the side of the second layer closest to the barrier material layer; and further including a p-type dopant hole carrier generation layer; wherein the p-type dopant hole carrier generation layer is a delta doped p-type layer within the second material or is within one or more of the epitaxial layers within the barrier material or is an ion implanted p-type layer.