Patent ID: 7816204

Claim:
A method of fabricating a semiconductor device, the method comprising steps of: forming a lower insulating film over a major surface of a semiconductor substrate, forming an upper insulating film over said lower insulating film, forming an opening through said upper insulating film and said lower insulating film, increasing a width of said opening at said lower insulating film by etching away a part of said lower insulating film exposed at said opening, forming a first conductor film along an inner side surface of said opening, and forming a second conductor film on said first conductor film with a dielectric film there between wherein said step of forming a first conductor film includes the step of forming said first conductor film so as to extend from an inner side surface of said opening to above an upper surface of said upper insulating film, further comprising the step of forming granular crystals on said first conductor film, the step of removing said first conductor film and said granular crystals located over the upper surface of said upper insulating film, and the step of removing said upper insulating film carried out after said step of forming a first conductor film and before said step of forming a second conductor film.