Semiconductor device and method of manufacturing same

A method of manufacturing a semiconductor device comprising:

• preparing a semiconductor substrate;
• forming a capacitor above the semiconductor substrate, the capacitor comprising a lower electrode containing metal, a multilayer dielectric film, and an upper electrode smaller than the lower electrode and containing metal;
• forming the capacitor comprising:
• forming a first conductive film to be processed into the lower electrode;
• forming a first dielectric film containing tantalum oxide or niobium oxide, a second dielectric film, and a third dielectric film, the second dielectric film being formed on the first conductive film, the first dielectric film being formed on the second dielectric film, the third dielectric film being formed on the first film, the second dielectric film and the third dielectric film each having a permittivity lower than the first dielectric film;
• forming a second conductive film to be processed into the upper electrode on the third dielectric film;
• etching the second conductive film, and forming the upper electrode;
• etching the third dielectric film, and removing a portion of the third dielectric film, the portion extending outwardly further than a sidewall of the upper electrode;
• and
• etching the first dielectric film, and removing a portion of the first dielectric film, the portion extending from an upper surface of the first dielectric film to a midway depth of the first dielectric film and extending outwardly further than a sidewall of the upper electrode.