Patent ID: 6350647
Filing Date: 2002-02-26
Classification: H01L

Abstract:
A method of manufacturing a semiconductor memory device, comprising:forming a first insulating film on an interlayer insulating film which is formed on a semiconductor substrate; forming a second insulating film on the first insulating film; forming a plurality of openings in the first insulating film and the second insulating film; forming a plurality of charge storage electrodes on the interlayer insulating film by arranging an electric conductor in each of the openings; removing the second insulating film; forming a plurality of sidewalls surrounding the charge storage electrodes on the first insulating film; etching the first insulating film using the sidewalls as etching masks, and removing the first insulating film except under the sidewalls, so as to form, on the interlayer insulating film, a plurality of insulating members which surround periphery of the charge storage electrodes and which are separated from each other; removing each of the sidewalls; forming a capacitance insulating film which covers the charge storage electrodes and the insulating members; and forming a plate electrode on the capacitance insulating film.