Patent ID: 8980647
Filing Date: 2015-03-17
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming an insulating film over a semiconductor substrate; forming a conductive film over the insulating film; forming a first ferroelectric film over the conductive film; forming an amorphous second ferroelectric film over the first ferroelectric film; forming a transition metal oxide material film containing ruthenium over the second ferroelectric film; forming a first conductive metal oxide film over the transition metal oxide material film without exposing the transition metal oxide material film to an air; annealing and crystallizing the second ferroelectric film after forming the first conductive metal oxide film; patterning the first conductive metal oxide film to form a top electrode of a ferroelectric capacitor; patterning the first ferroelectric film and the second ferroelectric film to form a capacitor dielectric film of the ferroelectric capacitor; and patterning the conductive film to form a bottom electrode of the ferroelectric capacitor.