Patent ID: 9379178
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. A method for manufacturing a semiconductor device comprising a capacitor element in which a capacitance dielectric film is provided between an upper electrode film and a lower electrode film, comprising steps of: (a) forming the lower electrode film over the semiconductor substrate; (b) forming the capacitance dielectric film over the lower electrode film; and (c) forming the upper electrode film over the capacitance dielectric film, wherein, at the step (a), an entire surface layer of the lower electrode film is formed of a polycrystalline titanium nitride, wherein, at the step (b), a portion of the capacitance dielectric film where directly contacting the entire surface layer of the lower electrode is formed of a polycrystalline metal oxide, and wherein the polycrystalline metal oxide is formed by an ALD method and inherits a crystallinity of the polycrystalline titanium nitride.