Patent ID: 7511321
Filing Date: 2009-03-31
Classification: H01L

Abstract:
1. A device comprising: a substrate made of a semiconductor material; a dielectric layer, having a final thickness, formed on an upper surface of the substrate, wherein the dielectric layer comprises an initial dielectric layer of intermediate thickness, which is less than the final thickness; and a final dielectric layer, wherein the initial dielectric layer comprises nitrogen distributed non-uniformly throughout the initial dielectric layer, wherein the concentration profile of nitrogen within the dielectric layer having a final thickness comprises a bell-shaped curve with a substantial higher peak concentration of nitrogen within a central core of the initial dielectric layer, wherein the concentration of nitrogen at an interface between the initial dielectric layer and the final dielectric layer is substantially reduced, and the concentration of nitrogen at an interface between the initial dielectric layer and the substrate is also substantially reduced; and an electrical lead in communication with the dielectric layer to provide an electrical field to the substrate through the dielectric field.