  We present a method to produce in-plane polarized piezo films with a freely
adjustable ratio of the strains in orthogonal in-plane directions. They can be
used in piezo bending actuators with a tunable curvature profile. The strains
are obtained as mean strains from a periodic polarization pattern produced by a
suitable doubly interdigitated electrode structure. This mechanism is
demonstrated for several examples using PZT sheets. We further discuss how this
tuning and the parameters of the electrode layout affect the overall magnitude
of the displacement.
