Patent ID: 8022468
Filing Date: 2011-09-20
Classification: H01L

Abstract:
1. A memory device, comprising: a substrate; a first dielectric layer formed over the substrate; a charge storage element formed over the first dielectric layer; a second dielectric layer formed over the charge storage element; a control gate formed over the second dielectric layer; a single layer formed over the control gate and the substrate and physically contacting an upper surface of the substrate, the single layer comprising a first interlayer dielectric comprising a silicon-rich silicon nitride having a refractive index ranging from 2.2 to 2.5, where the silicon-rich silicon nitride has a thickness ranging from about 250 Å to about 650 Å; at least one conductive layer formed over the single layer; at least one second interlayer dielectric formed over the at least one conductive layer, the at least one second interlayer dielectric comprising a material that blocks at least 95 percent of ultraviolet radiation; and another conductive layer formed over the at least one second interlayer dielectric, where the at least one second interlayer dielectric includes a contact hole that is filled by a metal layer that connects to the at least one conductive layer and the another conductive layer.