Patent ID: 7977257

Claim:
A method of manufacturing a semiconductor device, comprising: forming a lower electrode on a semiconductor substrate; forming a first zirconium oxide layer on the lower electrode by performing a first deposition process using a first zirconium source and a first oxidizing gas; forming a zirconium carbo-oxynitride layer on the first zirconium oxide layer by performing a second deposition process using a second zirconium source, a second oxidizing gas and a nitriding gas; forming a second zirconium oxide layer on the zirconium carbo-oxynitride layer by performing a third deposition process using a third zirconium source and a third oxidizing gas under an oxidation atmosphere sufficiently weak to reduce oxidization of the zirconium carbo-oxynitride layer; and then forming an upper electrode on the second zirconium oxide layer.