Patent ID: 7960227

Claim:
A manufacturing method of a semiconductor device, comprising: forming a capacitor structure, which is constructed by sandwiching a capacitor film made of a ferroelectric between a lower electrode and an upper electrode, above a semiconductor substrate; forming a hydrogen diffusion preventing film so that the capacitor structure is covered therewith; forming an interlayer insulating film which covers the capacitor structure with the hydrogen diffusion preventing film therebetween; and forming an opening in the interlayer insulating film and the hydrogen diffusion preventing film so that at least part of the capacitor structure is exposed in order to perform wiring connection of the capacitor structure, wherein said process of forming the opening includes: a first process of forming a first opening in the interlayer insulating film by dry etching until a part of a surface of the hydrogen diffusion preventing film is exposed; and a second process of forming a second opening in a portion of the hydrogen diffusion preventing film aligned with the first opening by wet etching, the opening constructed by the first opening and the second opening communicating with each other is formed.