Patent ID: 7507627
Filing Date: 2009-03-24
Classification: B82Y,H01L

Abstract:
1. A method of fabricating a nonvolatile memory device, comprising: forming a tunnel insulation film on a substrate; forming a charge storage film on the tunnel insulation film; forming a plurality of first metallic dots on the charge storage film, the plurality of first metallic dots comprising at least one first metallic element; forming a plurality of substitution dots on the charge storage film, the plurality of substitution dots comprising at least one substitution element; forming a plurality of second metallic dots on the charge storage film, the plurality of second metallic dots comprising at least one second metallic element, wherein forming the plurality of second metallic dots comprises substituting the at least one substitution element for the at least one second metallic element in a substitution reaction; forming a blocking insulation layer on the first and second plurality of metallic dots; and forming a gate electrode on the blocking insulation layer.