Patent ID: 7977732

Claim:
A method of forming a nonvolatile memory device, comprising: forming a device isolation layer including an upper device isolation layer that protrudes upward from an active region, the device isolation layer defining the active region; forming a first insulating layer on the active region; forming a nonconductive charge storage pattern on the first insulating layer, the charge storage pattern including a horizontal portion and a protrusion on an edge of the horizontal portion; forming a second insulating layer on the charge storage pattern; forming a control gate line on the second insulating layer; and wherein forming the charge storage pattern comprises: uniformly forming a nonconductive charge storage layer along a profile of the first insulating layer and the upper device isolation layer; forming a sacrificial pattern on the charge storage layer between the upper device isolation layer and an adjacent upper device isolation layer; and etching the charge storage layer using the sacrificial pattern as an etching mask.