Patent ID: 7781863
Filing Date: 2010-08-24
Classification: H01L

Abstract:
1. A semiconductor device comprising: a lower electrode made of a metallic material; a capacitance film made of an insulating material and laminated on the lower electrode, wherein the capacitance film has a relatively thin area and a relatively thick area; an upper electrode made of a metallic material, opposed to the lower electrode with the capacitance film sandwiched there between, and having an outline smaller than that of the lower electrode in plan view along the opposed direction; and a protective film made of the same material as that of the capacitance film and laminated on the upper electrode, wherein said relatively thick area of the capacitance film is opposed to the upper electrode and, said relatively thin area of the capacitance film is not opposed to the upper electrode, and wherein a thickness of said relatively thin area of the capacitance film is smaller than a thickness of the protective film, and wherein the thickness of the protective film and a thickness of said relatively thick area of the capacitance film are substantially the same, and an opening is provided in at least part of said relatively thin area of the capacitance film.