Patent ID: 9679904
Date: 2017-06-13
CPC Classifications: H01L

Claim:
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 containing iridium and ruthenium over the first ferroelectric film; forming a first conductive metal oxide film which is made of an iridium oxide and is in contact with the second ferroelectric film; 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.