Patent ID: 7059711

Claim:
A dielectric film structure having a substrate and a dielectric film provided on said substrate, wherein said dielectric film has (001) face orientation with respect to said substrate; and a value u in the following equation (1) regarding said dielectric film is a real number greater than 2: u =( C c /C a )×( W a /W c ) (1) where, C c is a count number of a peak of a (00l′) face of said dielectric film in an Out-of-plane X ray diffraction measurement (here, l′ is a natural number selected so that C c becomes maximum); C a is a count number of a peak of a (h′00) face of said dielectric film in an In-plane X ray diffraction measurement (here, h′ is a natural number selected so that C c becomes maximum); W c is a half-value width of a peak of the (00l′) face of said dielectric film in an Out-of-plane rocking curve X ray diffraction measurement; and W a is a half-value width of a peak of the (h′00) face of said dielectric film in an In-plane rocking curve X ray diffraction measurement.