Patent ID: 9018056
Filing Date: 2015-04-28
Classification: H01L

Abstract:
1. A method of making complementary non-inverted P-channel and non-inverted N-channel III-Nitride field effect transistors on a substrate comprising: growing III-nitride epitaxial layers on a substrate wherein the nitrogen-polar ( depositing an oxide on the substrate; defining an opening in the oxide wherein the opening approaches the substrate; growing epitaxially a first nitrogen-polar III-Nitride material; utilizing the opening to selectively grow epitaxial layers; growing epataxially a GaN buffer layer, a AlGaN back barrier, a channel layer, a spacer layer, a barrier layer, a cap layer, and a carrier enhancement epitaxial layer for the source drain access region; depositing an oxide material on the substrate such that the oxide material protects the first nitrogen-polar III-Nitride from additional epitaxial growth; growing an AlN nucleation layer/polarity inversion layer; growing a gallium-polar III-Nitride second material including epitaxial layers such as a GaN buffer layer, a AlGaN back barrier, a channel layer, a spacer layer, a barrier layer, a cap layer, and a carrier enhancement epitaxial layer for the source drain access region; depositing a dielectric; planarizing the dielectric and thereby reducing the topography at the edge of the first and second nitrogen-polar III-Nitride material to facilitate photolithography operation; fabricating a normally-off non-inverted P-channel III-Nitride Field Effect transistor in the first nitrogen-polar III-Nitride; and fabricating a normally-off non-inverted N-channel III-Nitride Field Effect transistor in the second gallium-polar III-Nitride.