Patent ID: 6693321
Filing Date: 2004-02-17
Classification: H01L

Abstract:
A semiconductor device formed on a semiconductor substrate having an active region, the semiconductor device comprising:a gate dielectric layer disposed on the semiconductor substrate; a floating gate formed on the gate dielectric layer defining a channel interposed between a source and a drain formed within the active region of the semiconductor substrate; a control gate formed above the floating gate; and an intergate dielectric layer interposed between the floating gate and the control gate, the intergate dielectric layer comprising: a first layer formed on the floating gate; a second layer formed on the first layer; and a third layer formed on the second layer; wherein each of the first, second and third layers has a dielectric constant greater than SiO2, wherein the first and third layers each have a dielectric constant greater than the dielectric constant of the second layer, and wherein the second layer has a dielectric constant greater tan the dielectric constant of silicon nitride.