Patent ID: 7663177
Filing Date: 2010-02-16
Classification: H01L

Abstract:
1. A non-volatile memory device, comprising: a substrate; a tunneling dielectric layer provided on the substrate; a composite charge trapping layer provided on the tunneling dielectric layer and having an energy band structure to construct a composition gradient energy band structure with a quantum-well-like energy level structure, wherein the composite charge trapping layer includes a plurality of different materials, the different materials including a first material that includes at least one element and a second material that includes at least one element which is not present in the first material, the first and second materials being disposed in different layers; a block dielectric layer provided on the composite charge trapping layer; and a conductor layer provided on the block dielectric layer; wherein energy band gaps of the tunneling dielectric layer and the block dielectric layer are higher than energy band gap of the charge trapping layer; wherein the materials of the tunneling dielectric layer, the composite charge trapping layer and the block dielectric layer are changed gradually in the sequence of SiO wherein x and y are doping quantities of Hf and Al, respectively, and x and y are not zero; and wherein an energy band gap of SiO