Patent ID: 6812517
Filing Date: 2004-11-02
Classification: H01L

Abstract:
A dielectric storage memory cell comprising:a substrate; a first dielectric layer overlying the substrate and having a first relative permittivity a charge storage layer overlying the first dielectric layer the charge storage layer storing charge representative of a data value; a second dielectric layer overlying the charge storage layer, the second dielectric layer having a second relative permittivity greater than the first relative permittivity; an oxynitride interfacial layer interposed between the charge storage layer and the second dielectric layer having a thickness less than ten Angstroms for stabilizing dangling bonds in the second dielectric layer; a gate electrode overlying the second dielectric layer and forming a control electrode of the dielectric storage memory cell; and first and second current electrodes formed within the substrate in close proximity to an area underlying the gate electrode, wherein higher relative permittivity of the second dielectric as compared to the first dielectric increases capacitive coupling between the gate electrode and locations within the charge storage layer containing stored charge while reducing charge leakage from the gate electrode to the charge storage layer.