Dielectric film structure, piezoelectric actuator using dielectric element film structure and ink jet head

摘要

The present invention provides a dielectric film structure having a substrate and a dielectric film provided on the substrate and in which the dielectric film has (001) face orientation with respect to the substrate, and in which a value u in the following equation (1) regarding the dielectric film is a real number greater than 2: u=(Cc/Ca)×(Wa/Wc)  (1) where, Cc is a count number of a peak of a (001′) face of the dielectric film in an Out-of-plane X ray diffraction measurement (here, 1′ is a natural number selected so that Cc becomes maximum); Ca is a count number of a peak of a (h′00) face of the dielectric film in an In-plane X ray diffraction measurement (here, h′ is a natural number selected so that Cc becomes maximum); Wc is a half-value width of a peak of the (001′) face of the dielectric film in an Out-of-plane rocking curve X ray diffraction measurement; and Wa is a half-value width of a peak of the (h′00) face of the dielectric film in an In-plane rocking curve X ray diffraction measurement.