Patent ID: 6448132
Filing Date: 2002-09-10
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device, comprising:forming a first insulating film, a second insulating film, and a resist film, in order, on a principal surface of an underlying layer; forming a first opening, as a capacitor pattern, in said resist film using photolithography; forming an initial pocket in said first insulating film by anisotropic etching of said second and first insulating films, in order, until the principal surface of said underlying layer is exposed, said resist film with the capacitor pattern being used as a mask; forming a pocket, wider than said initial pocket, in said first insulating film by isotropic etching of inner walls of said initial pocket using the remaining second insulating film as a mask; forming a conductive film on a wall surface and a floor surface of said pocket; patterning said conductive film and forming a first electrode; and forming a dielectric layer and a second electrode, in order, on said first electrode, the method further comprising forming a third insulating film, before said first insulating film, as an interlayer insulating film and in said underlying layer; and removing by etching a principal surface side of said underlying layer, until said interlayer insulating film is exposed, said removing by etching occurring between said forming a first electrode and said forming a dielectric layer.