Patent ID: 6492227
Filing Date: 2002-12-10
Classification: H01L

Abstract:
A method for fabricating memory devices on a common semiconductor substrate, comprising the steps of:(a) forming at least one dummy gate structure for at least one memory device on the common semiconductor substrate; (b) depositing dielectric material surrounding the at least one dummy gate structure on the common semiconductor substrate; (c) etching the dielectric material and the at least one dummy gate structure to form at least one control gate void and at least one floating gate void for the at least one memory device; (d) forming a gate dielectric layer on a bottom surface of the at least one floating gate void; (e) depositing floating gate material on the gate dielectric layer in the at least one floating gate void to form a floating gate of the at least one memory device; (f) depositing a dielectric layer on the floating gate; and (g) depositing control gate material on the dielectric layer in the at least one control gate void to form a control gate of the at least one memory device.