Patent ID: 8183616

Claim:
A semiconductor device including a capacitor, comprising: a lower electrode of the capacitor made of a metal film; a first interlayer insulating film having a first opening portion and formed over the lower electrode, a top surface of the lower electrode being exposed from the first interlayer insulating film through the first opening portion, and the lower electrode being partially covered by the first interlayer insulating film; a first sidewall made of a first insulating film and formed over a side surface of the first opening portion; a first capacitor insulating film of the capacitor formed over the first interlayer insulating film and inside the first opening portion, wherein the first sidewall is formed between the first capacitor insulating film and the first interlayer insulating film, and wherein, in the first opening portion, the first capacitor insulating film is directly formed on the lower electrode and the first side wall; an intermediate electrode of the capacitor formed over the first capacitor insulating film; a second interlayer insulating film having a second opening portion and formed over the intermediate electrode, a top surface of said intermediate electrode being exposed from the second interlayer insulating film through the second opening portion; a second sidewall made of a second insulating film and formed over a side surface of the second opening portion; a second capacitor insulating film of the capacitor formed over the second interlayer insulating film and inside the second opening portion, wherein the second sidewall is formed between the second capacitor insulating film and the second interlayer insulating film, and wherein, in the second opening portion, the second capacitor insulating film is directly formed on the intermediate electrode and the second side wall; and an upper electrode of the capacitor formed over the second capacitor insulating film.