Patent ID: 7763511
Filing Date: 2010-07-27
Classification: B82Y,H01L

Abstract:
1. An apparatus comprising: a substrate; a dielectric stack formed over the substrate, the dielectric stack including a first dielectric material with a first element and a second dielectric material with a second element; and a non-insulating nanocrystal disposed on the second dielectric material, the non-insulating nanocrystal to store electric charge, wherein the first dielectric material and the second dielectric material are configured to have a gradual composition change to provide a one-sided triangle type of band offset across the first dielectric material and the second dielectric material of the dielectric stack with a highest energy at an interface of the first dielectric material and the substrate such that concentrations of the first and second elements continuously vary to result in a graded composition with a graded energy band from the substrate to the non-insulating nanocrystal.