Patent ID: 6960800

Claim:
A semiconductor device comprising: a lower electrode formed on a substrate; a capacitive insulating film made of a ferroelectric film on the lower electrode; an upper electrode formed on the capacitive insulating film; a contact layer formed directly on the upper electrode so as not to be in contact with the capacitive insulating film; an insulating film made of silicon dioxide or nitride formed directly on the contact layer to cover the lower electrode, the capacitive insulating film, the upper electrode and the contact layer, and wherein the contact layer is provided on a surface of the upper electrode and in a region other than the region where a metal interconnect is connected to the upper electrode, and wherein the contact layer is a single layer film or a multilayer structure, the single-layer film being made of a metal oxide or a metal nitride, the multilayer structure being made up of metal oxide and metal nitride films.