Patent ID: 7492001
Filing Date: 2009-02-17
Classification: G11C,H01L

Abstract:
1. A structure for use in a semiconductor device, comprising: a substrate; source, drain and channel regions formed within the substrate; a first oxide layer having a first dielectric constant formed over the source, drain, and channel regions of the substrate; a charge storage layer formed upon the first oxide layer, wherein the charge storage layer is configured to store two bits of information; a second oxide layer formed upon the charge storage layer and having a thickness ranging from about 30 Å to about 100 Å; a single layer comprising one dielectric material formed directly on the second oxide layer, the one dielectric material having a second dielectric constant greater than the first dielectric constant and where the second dielectric constant is greater than 7.0, wherein the one dielectric material comprises hafnium aluminate, and wherein a thickness of the single layer comprising the one dielectric material ranges from about 40 Å to about 200 Å; and a gate electrode formed directly upon the single layer comprising one dielectric material.