Patent ID: 7211486
Filing Date: 2007-05-01
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a floating gate on a semiconductor substrate so that the floating gate is insulated from the semiconductor substrate by a first insulation film; forming a tunnel insulation film to cover part of the floating gate and part of the semiconductor substrate; forming a first semiconductor film to cover the tunnel insulation film; forming a second insulation film to cover the first semiconductor film; etching the first semiconductor film and the second insulation film so as to form a lower electrode of a capacitor element and a capacitor insulation film disposed on the lower electrode and to keep the floating gate covered by the first semiconductor film; forming a second semiconductor film to cover the capacitor insulation film and part of the semiconductor substrate; etching the second semiconductor film so as to form an upper electrode disposed on the capacitor insulation film; and etching the first semiconductor film covering the floating gate electrode to form a control gate.