Patent ID: 7378314

Claim:
A method for forming a storage device structure comprising: providing a substrate of a first conductivity type; forming overlying regions of sacrificial material; forming a charge storage layer overlying the regions of sacrificial material and removing portions of the charge storage layer overlying the regions of sacrificial material, the charge storage layer remaining along sidewalls of the regions of sacrificial material and between the regions of sacrificial material; forming conductive sidewall spacers adjacent to portions of the charge storage layer that are along sidewalls of the regions of sacrificial material, each of the conductive sidewall spacers respectively forming a control gate electrode of the storage device structure; ion implanting the storage device structure to form source and drain diffusion regions in the substrate underlying and between the conductive sidewall spacers; removing the regions of sacrificial material and removing portions of the charge storage layer along sidewalls of the conductive sidewall spacers to leave the conductive sidewall spacers freestanding; electrically isolating exposed surfaces of the conductive sidewall spacers, the charge storage layer and the substrate; and forming a conductive layer overlying and between the conductive sidewall spacers, the conductive layer forming a continuous select gate electrode of the storage device structure.