Patent ID: 7348239

Claim:
A method of manufacturing a semiconductor device, the method comprising the steps of: forming a dielectric film on a semiconductor substrate and stripping the dielectric film of a predetermined region; forming an interlayer insulating film on the region from which a portion of the dielectric film has been stripped; forming a first conductive film on the entire structure, and blank etching the first conductive film to form first and second gate electrodes, which are insulated from the semiconductor substrate through the dielectric film, on sidewalls of the interlayer insulating film; stripping the dielectric film exposed between the first and second gate electrodes; forming an oxide film and a second conductive film on the entire structure, and then performing a blanket etch process to form a third gate electrode, which is insulated from the semiconductor substrate and the first and second gate electrodes by means of the oxide film between the first and second gate electrodes; forming a third conductive film on the entire structure, and then performing a blanket etch process to form a fourth gate electrode connected to the first, second, and third gate electrodes; and stripping the interlayer insulating film and then forming a source and drain at given regions of the semiconductor substrate.