Patent ID: 8283227

Claim:
A method for manufacturing a semiconductor memory device including a capacitor, comprising: forming a lower electrode made of a titanium nitride film above a semiconductor substrate; forming a dielectric film on the lower electrode; and forming an upper electrode including a titanium nitride film on the dielectric film, wherein at least the dielectric film contacting with the upper electrode is formed by atomic layer deposition (ALD) at a first temperature, a first titanium nitride film is formed in contact with the dielectric film at a second temperature that is greater than the first temperature by not more than 70° C., in forming the upper electrode, the first titanium nitride film is converted into a first upper electrode including a first polycrystalline titanium nitride film by a heat treatment, and a second upper electrode including a polycrystalline titanium nitride film is formed on a surface of the first upper electrode.