Patent ID: 9431526
Filing Date: 2016-08-30
CPC Classification: H01L

Claim Text:
1. A heterostructure on a silicon substrate comprising: a single crystal silicon substrate; a single crystal rare earth oxide template positioned on the silicon substrate, the template being substantially crystal lattice matched to the surface of the silicon substrate; a heterostructure positioned on the template and defining at least one heterojunction at an interface between a III-N layer and a III-III-N layer, the template and the heterostructure being crystal matched to reduce stress/strain in the heterostructure; and a single crystal rare earth oxide dielectric layer grown on the heterostructure so as to induce compressive stress in the dielectric layer and tensile strain at the at least one heterojunction, the compressive stress in the dielectric layer and the tensile strain in the III-III-N layer combining to induce a piezoelectric field leading to higher carrier concentration in 2DEG at the heterojunction.